JPH11248096A - Insulation gas recovery and filling device, insulation gas recovery device and insulation gas filling device - Google Patents

Abstract

(57) [Summary] [Problem] To be able to collect insulating gas well and to be portable.
Provided are an insulating gas collecting and filling apparatus, an insulating gas collecting apparatus, and an insulating gas filling apparatus which are excellent in operability. SOLUTION: A vacuum pump unit A for sucking and sending an insulating gas from an insulating gas filling device, a compression unit B for compressing the collected gas sent out, and a liquefaction unit C for cooling and condensing and liquefying the compressed collected gas. And a storage tank D for enclosing and storing the liquefied collected liquid, a vaporizing unit E for heating and vaporizing the collected liquid sent from the enclosed storage tank D and sending it to the insulating gas encapsulating device. And a control unit F for controlling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating gas recovery and filling device for recovering and filling an insulating gas such as SF6 gas from an insulating gas filling device such as a transformer, an insulating gas collecting device, and an insulating gas filling device. It is.

[0002]

2. Description of the Related Art SF6 (sulfur hexafluoride) gas has excellent heat resistance and electrical insulation properties and is sealed as an insulating gas in sealing equipment such as a transformer. Must be recovered from the encapsulation equipment.

[0003] In the conventional SF6 gas recovery apparatus, since the pressure of the insulating gas in the transformer is relatively high, recovery is performed using the pressure or suction is performed using a pump.

[0004]

However, if the gas is recovered at the pressure of the insulating gas, the recovery of the gas is not sufficient.
Further, at normal temperature and normal pressure, SF6 gas remains as a gas, and the capacity of gas to be recovered is large. Therefore, there is a problem that the recovery device itself becomes large, the carrying weight is large, and the portability is poor.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide an insulating gas collecting and filling apparatus, an insulating gas collecting apparatus and an insulating gas filling apparatus which are capable of satisfactorily collecting an insulating gas and which are excellent in portability and operability. Is to do.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a vacuum pump unit for sucking and sending an insulating gas from an insulating gas filling device, and compressing the sent recovered gas. A compression unit, a liquefaction unit for cooling and condensing and liquefying the compressed recovery gas, a storage tank for enclosing and storing the liquefied recovery liquid, and an insulating gas for heating and vaporizing the recovery liquid sent from the sealed storage tank. This is an insulating gas recovery and filling device comprising a vaporizing unit for sending out to a sealed device and a control unit for controlling the devices of these units.

According to a second aspect of the present invention, there is provided a main circuit for sending an insulating gas from an inlet side to an outlet side via a vacuum pump, a bypass circuit for the vacuum pump, and detecting a gas pressure on the inlet side, An insulating gas recovery apparatus comprising a vacuum pump unit including: a flow path switching unit that bypasses a main circuit to switch to a bypass circuit when the pressure is higher than a predetermined value and switches to a vacuum pump of the main circuit when the pressure is lower than a predetermined value.

According to a third aspect of the present invention, a vacuum pump is connected between an inlet-side connection port for connecting a connection hose to an insulating gas sealing device and an outlet-side connection port for connecting a connection hose to a compressor unit. And a bypass circuit that bypasses the vacuum pump of the main circuit, detects the gas pressure on the inlet side, and switches the flow to the bypass circuit when the pressure is higher than a predetermined value, and to switch to the main circuit of the vacuum pump when the pressure is lower than a predetermined value. 2. The insulating gas recovery device according to claim 1, wherein the vacuum pump unit is provided with a path switching unit.

According to a fourth aspect of the present invention, an inlet side connection port is provided between an inlet side connection port connecting a connection hose to an insulating gas filling device and an outlet side connection port connecting a connection hose to a compressor unit side. Main circuit to which valve, pressure regulating valve, vacuum pump, cushion tank, outlet side main valve are connected, bypass circuit to bypass pressure regulating valve and vacuum pump of main circuit, gas from inlet side to main circuit or bypass A flow path switching valve for switching to flow to one side of the circuit, and a pressure detecting means for detecting a gas pressure on the circuit inlet side and controlling the flow path switching valve for switching to a bypass circuit when the pressure is higher than a predetermined pressure and to a main circuit when the pressure is lower than a predetermined pressure. And an insulating gas recovery device comprising a vacuum pump unit.

According to a fifth aspect of the present invention, a pressure switch is provided on the circuit inlet side, and a solenoid valve is provided at each of the inlets of the main circuit and the bypass circuit, and control means for controlling opening and closing of both solenoid valves by the pressure switch is provided. An insulating gas recovery device according to any one of claims 2 to 4.

According to a sixth aspect of the present invention, a safety valve for releasing an insulating gas is provided between the flow path switching valve and the pressure regulating valve.
It is an insulating gas recovery device of the description.

According to a seventh aspect of the present invention, the main circuit of the inlet side and the outlet side is branched from the main circuit, respectively, and the vacuum pump connection port for evacuating the main circuit is connected to the manually operated stop valve. An insulating gas recovery device according to claim 5.

[0013] The invention according to claim 8 is that the inlet-side connection port for connecting the connection hose to the insulating gas filling device and the outlet-side connection port for connecting the connection hose to the compressor unit side. A main circuit that communicates the valve, pressure regulating valve, vacuum pump, cushion tank, and outlet side main valve, a bypass circuit that bypasses the main circuit of the pressure regulating valve and the vacuum pump, and an inlet side from the gas pressure at the main circuit inlet side Switching valve for switching the gas from the main circuit or the bypass circuit to flow to one of the main circuit and the bypass circuit, and connecting the inlet side and the outlet side of the main circuit at the inlet side and the outlet side, respectively. An insulating gas recovery device comprising a vacuum pump unit that is connected to a port and a manually operated stop valve and is installed in a casing configured to be able to convey these components.

According to a ninth aspect of the present invention, an inlet-side connection port and an inlet-side main valve and a section provided adjacent to the inlet-side vacuum pump connection port and its stop valve are provided on one side surface of the casing. 9. The insulating gas recovery device according to claim 8, wherein a section is provided on the other side of the casing, the section being provided with an outlet-side connection port and an outlet-side main valve, and an outlet-side vacuum pump connection port and its stop valve disposed adjacent to each other. It is.

According to a tenth aspect of the present invention, an inlet-side main valve is provided in a circuit between an inlet-side connection port for connecting a connection hose on a vacuum pump unit side and an outlet-side connection port for connecting a connection hose on a liquefaction unit. 2. The insulating gas recovery device according to claim 1, wherein a compressor unit is configured by providing a pressure reducing device, a gas compressor, and an outlet side valve.

According to the eleventh aspect of the present invention, a suction-side pressure switch is provided on the inlet side of the gas compressor in the circuit, and a discharge-side pressure switch is provided on the outlet side, and control means for controlling the operation of the compressor by the pressure switch is provided. The insulating gas recovery device according to claim 10.

According to a twelfth aspect of the present invention, there is provided a vacuum pump connecting port branched from a pipe between an outlet side main valve and an outlet side connecting port of the circuit and a manually operated stop valve. Is an insulating gas recovery device.

According to a thirteenth aspect of the present invention, the circuit between the inlet connection port connecting the connection hose on the vacuum pump unit side and the outlet connection port connecting the connection hose on the liquefaction unit side has an inlet side main valve. , The decompression device, the gas compressor, and the outlet side valve are connected, and the vacuum pump connection port branched from the piping between the circuit outlet side valve and the outlet side connection port is connected to the manually operated stop valve. And an insulating gas recovery apparatus in which a compressor unit is configured by installing them in a casing configured to be transportable.

According to a fourteenth aspect of the present invention, a section in which an inlet-side connection port and an inlet-side main valve are arranged adjacent to one side surface of a casing is provided on the other side surface of the casing. 14. The insulating gas recovery apparatus according to claim 13, wherein a section is provided in which a valve, a pump connection port for evacuation on the outlet side, and a stop valve thereof are disposed adjacent to each other.

According to a fifteenth aspect of the present invention, the circuit between the inlet connection port for connecting the connection hose to the compressor unit side and the outlet connection port for connecting the connection hose to the storage tank side is provided on the inlet side. 2. The insulating gas recovery apparatus according to claim 1, wherein a liquefaction unit is configured by connecting a main valve, a gas liquefaction heat exchanger, and a pressure holding on / off valve.

According to a sixteenth aspect of the present invention, there is provided a pressure switch for detecting the pressure at the outlet of the gas liquefaction heat exchanger in the circuit, and the pressure switch is opened when the pressure is higher than a predetermined value and closed when the pressure is lower than a predetermined value. The insulating gas recovery device according to claim 15, further comprising control means for controlling the on-off valve.

According to a seventeenth aspect of the present invention, the heat exchanger for gas liquefaction is constituted by a shell-and-coil type heat exchanger, and includes a refrigerator having a coil of the heat exchanger as an evaporator. 16. The insulating gas recovery apparatus according to claim 15, further comprising control means for controlling operation by a pressure switch on a cycle low pressure side.

According to the invention of claim 18, the insulating gas recovery according to claim 15, wherein the circuit is branched from a circuit between the outlet side main valve and the outlet side connection port, and a vacuum pump connection port and a manually operated stop valve are provided. Device.

According to the nineteenth aspect of the present invention, the circuit between the inlet connection port for connecting the connection hose to the compressor unit side and the outlet connection port for connecting the connection hose to the storage tank side is provided on the inlet side. Connect the main valve, heat exchanger for gas liquefaction, and on-off valve for pressure holding, branch from the circuit of the outlet side main valve and the outlet side connection port, connect the vacuum pump connection port and its stop valve, and further liquefy gas This is an insulating gas recovery device in which a refrigerator is connected to a heat exchanger for use and a liquefaction unit is configured by installing the components in a casing configured to be able to transport these components.

According to a twentieth aspect of the present invention, a section in which an inlet-side connection port and an inlet-side valve are arranged adjacent to one side surface of a casing, and an outlet-side connection port and an outlet side valve are provided on the other side surface of the casing. 20. The insulating gas recovery apparatus according to claim 19, wherein a section is provided in which the valve, the vacuum-evacuation pump connection port on the outlet side, and the stop valve are disposed adjacent to each other.

According to a twenty-first aspect of the present invention, there is provided a storage device for storing a liquid in a pipe between an inlet connecting port connecting a connecting hose to a liquefaction unit and an outlet connecting port connecting a connecting hose to a vaporizing unit. This is an insulating gas recovery device that connects storage tanks to form a storage tank.

According to a twenty-second aspect of the present invention, there is provided a circuit between an inlet-side connection port for connecting a connection hose to a storage tank unit side and an outlet-side connection port for connecting a connection hose to a device side for filling insulating gas. Is an insulating gas filling device that connects an inlet-side main valve, an inlet-side open / close control valve, a carburetor, an outlet-side open / close control valve, a pressure regulating valve for charging pressure adjustment, and an outlet-side main valve to form a vaporizing unit. .

According to a twenty-third aspect of the present invention, there is provided an insulating gas filling apparatus according to the twenty-second aspect, wherein the opening / closing control valve on the inlet side of the vaporizer is controlled to open / close in accordance with the liquid level in the vaporizer provided in the vaporizer. It is.

According to a twenty-fourth aspect of the present invention, the opening / closing control valve on the outlet side of the vaporizer is controlled by a gas gauge in the vaporizer and a pressure gauge and a pressure switch provided on the recovered vaporized gas outlet side of the vaporizer. An insulating gas filling apparatus according to claim 22.

According to a twenty-fifth aspect of the present invention, there is provided the insulating gas filling apparatus according to the twenty-second aspect, wherein a dryer and a filter are connected to a circuit downstream of the pressure regulating valve for regulating the filling pressure.

According to a twenty-sixth aspect of the present invention, the vaporizer includes a vaporization tank for introducing a stored recovery liquid, and a heat transfer coil provided in the tank, and the hot water is supplied to and circulated through the heat transfer coil. 23. The insulating gas filling apparatus according to claim 22, wherein a vessel is connected.

According to a twenty-seventh aspect of the present invention, an operation panel for operating a vacuum pump unit, a compression unit, a liquefaction unit, a vaporization unit and the like is provided on the front side of the casing.
The operation panel is provided with operation switches and display lamps for displaying the operation status, and a wiring connection port for connecting and controlling the wiring cables from the above units collectively is provided. It is a filling device.

According to a twenty-eighth aspect of the present invention, a lower part of the casing of the control unit is provided with an accommodating portion for guiding the wiring cable from the rear side to the front side and accommodating a connection hose for connecting the units. 28. An insulating gas recovery and filling device according to Item 27.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

First, the insulating gas recovery and filling apparatus of the present invention
As shown in FIGS. 1 and 5, a vacuum pump unit A for sucking and sending out the collected gas from the insulating gas charging device, and FIGS.
As shown in FIG. 6, a compression unit B for compressing the recovered gas sent from the vacuum pump unit A, and as shown in FIGS. 3 and 7, liquefaction for cooling and condensing and liquefying the recovered gas compressed by the compression unit B. A unit C and a storage tank D for enclosing and storing a liquefied collected gas as shown in FIG.
And a vaporizing unit E that heats and vaporizes the recovered gas delivered from the sealed storage tank D and sends it to the insulating gas filling equipment. Further, as shown in FIG. 8, these units A, B, C, and And a control unit F for controlling the devices D and E, which are divided and accommodated in the casings 10A to 10F and used by connecting them with connection hoses or cables when used. It is.

The units A, B, C, E, D,
F will be described sequentially.

(A) Vacuum pump unit A As shown in FIG. 1, the inlet side connection port 12A connected to the connection hose 11A connected to the insulating gas filling device is connected to the connection hose 11B to the compressor unit B side. Between the inlet side main valve 13A and the pressure regulating valve 1
4. Oil-free vacuum pump 15, cushion tank 1
6. A main circuit 17 to which the outlet-side main valve 13B is connected is provided, and a bypass 18 is connected between the inlet-side main valve 13A and the cushion tank 16 in parallel with the main circuit 17 of the vacuum pump 13.

Flow passage switching solenoid valves 19a and 19b are connected to branch portions of the main circuit 17 and the bypass 18, respectively, to constitute flow passage switching means 19, and a pressure for detecting the pressure of SF6 gas is provided upstream of the passage switching means 19. A pressure switch 21 for opening and closing the flow path switching solenoid valves 19a and 19b for switching the bypass 18 and the main circuit 17 based on the detected gas pressure is provided.

Main circuit 1 on the upstream side of the flow path switching solenoid valve 19a
7 is connected to a protection electromagnetic valve 22 which is turned off in the event of a power failure, and a downstream side thereof is connected to a safety valve 23 which is opened when the main circuit 17 becomes abnormally high pressure.
A check valve 24 is connected to the downstream side of.

The vacuum pump 15 is connected to a pressure balancing solenoid valve 25, and is opened in parallel with the pressure regulating valve 14 and the vacuum pump 15 when the pressure of the gas sent to the vacuum pump 15 becomes higher than a predetermined value. A bypass pressure regulating valve 26 for bypassing the gas is connected.

The pressure regulating valve 14 on the inlet side of the vacuum pump 15
Is for reducing the flow rate of gas sent to the vacuum pump 15, and a pressure gauge 27 is connected to an inlet side of the vacuum pump 15, and a pressure gauge 28 is connected to an inlet side of the cushion tank 16. .

The vacuum pump unit A shown in FIG.
Is housed in a casing 10A as shown in FIG.

In FIG. 5, (b) is a front view,
(A) is a left side view, and (c) is a right side view.

As shown in FIG. 5B, the casing 10
On the front surface of A, the various pressure gauges 20, 28,
27, and a main valve 29 for introducing gas pressure into the pressure gauges 20, 28, 27. As shown in FIG. 5A, the left side of the casing 10A is connected to an insulating gas sealing device. 30A in which an inlet-side connection port 12A for opening and closing, and an inlet-side main valve 13A which is manually opened / closed, are provided, and the main circuit 17 shown in FIG. Connection port 31A and its stop valve 32
5A, and an outlet-side connection port 12B for connection to the compression unit B and an outlet-side main valve 13B that is manually opened and closed, as shown in FIG. 5C. Section 30B is provided, and the section 3
0B, a main circuit 17 shown in FIG. 1 and a branching pump connection port 31B branched from the main circuit 17 and a stop valve 32B thereof are arranged, and a wiring connection port 35 for connection to the control unit F is provided.
F is provided.

Casters 36 for transport are provided at the bottom of the casing 10A, and eyebolts 37 for lifting with wires or the like are provided at the four corners of the top surface.

In the vacuum unit A shown in FIGS. 1 and 5, when recovering the insulating gas from the insulating gas sealing device such as a transformer, the connection hose 11A is connected to the sealing device, and the evacuation pump connection port 31A is connected. , 31B are connected to a small vacuum pump (not shown) to evacuate the main circuit 17 and the bypass 18, and then stop valves 32A, 32B.
Then, by opening the inlet side main valve 13A, the control power is turned on, and the insulating gas flows into the main circuit 17 from the inlet side connection port 12. In the initial stage of the inflow, since the gas pressure in the sealed device is high, the gas is switched to the bypass 18 by the flow path switching means 19, and then, when the gas pressure decreases to near the atmospheric pressure, the flow is switched by the flow path switching means 19. Then, the operation is switched to the main circuit 17 side, and the suction gas of the vacuum pump 15 recovers the insulating gas in the sealed device.

The recovered gas enters the cushion tank 16 and is supplied to the compression unit B from the outlet connection port 12B.

(B) Compression unit B As shown in FIG. 2, the inlet side connection port 42B for connecting the connection hose 11B on the vacuum pump unit A side and the outlet side connection port for connecting the connection hose 41C on the liquefaction unit C side. 42
C, an inlet side main valve 43 for manual operation.
B, pressure reducing device 44, strainer 45, gas compressor 46,
The after-strainer 47 and the outlet-side main valve 43C are connected in order to form the compression unit B.

The gas compressor 46 comprises a low-pressure stage compression section 48a and a high-pressure stage compression section 48b, between which an intercooler 49 is connected and an aftercooler 50 is connected to the discharge side of the high-pressure stage compression section 48b. You.

A pressure gauge 51 and a low pressure side pressure switch 52 are provided on the downstream side of the pressure reducing device 44 of the circuit 40, a pressure gauge 53 is provided on the discharge side of the low pressure stage compression section 48a, and a high pressure gauge is provided on the after strainer 47. A side pressure gauge 54 and a high pressure side switch 55 are provided.

Reference numeral 56 is a safety valve, and 57 is a drain valve.

The compression unit B shown in FIG.
Is accommodated in the casing 10B as shown in FIG.

In FIG. 6, (b) is a front view,
(A) is a left side view, and (c) is a right side view.

As shown in FIG. 6B, the casing 10
On the front surface of B, various pressure gauges 51, 53, and 53 described in FIG.
54, and a main valve 59 for introducing gas pressure to the pressure gauges 51, 53, 54, and a left side of the casing 10B is connected to the vacuum pump unit A as shown in FIG. 60B in which an inlet-side connection port 42B and an inlet-side main valve 43B are arranged. Further, as shown in FIG. 6C, on the right side surface of the casing 10B,
An outlet-side connection port 42C for connecting to the liquefaction unit C,
A section 60C where the outlet side main valve 43C is arranged is provided,
In the section 60C, a pump connection port 61C for evacuation branched from the circuit 40 shown in FIG. 2 and its stop valve 62C are arranged, and a wiring connection port 65F for connecting to the control unit F is provided.

As in the case of the vacuum pump unit A, a caster 36 for transport is provided at the bottom of the casing 10B, and eyebolts 37 for lifting with wires or the like are provided at the four corners of the top surface.

In the compression unit B shown in FIGS. 2 and 6, after the inside of the circuit 40 is evacuated from the evacuation pump connection port 61C, the recovered gas from the vacuum unit A is supplied to the inlet side connection port 42B and the inlet side. Circuit 40 via side valve 43B
After being compressed by the gas compressor 46, the outlet side main valve 4
The compressed recovery gas is supplied to the liquefaction unit C via the connection hose 41C from the outlet side connection port 42C via 3C.

(C) Liquefaction unit As shown in FIG. 3, an inlet side connection port 72C for connecting a connection hose 41C to the compressor unit B side and an outlet side connection for connecting a connection hose 71D to the storage tank unit D. A circuit 70 between the port 72D and the inlet 72D includes an inlet-side main valve 73C, an inlet-side check valve 74, a heat exchanger 75 for gas liquefaction, a pressure-holding on-off valve 76 for holding the pressure at a predetermined pressure or higher, and an outlet side. The liquefaction unit C is configured by connecting the check valve 77 and the outlet-side main valve 73D.

The gas liquefaction heat exchanger 75 is composed of a shell and tube heat exchanger. The compressed recovery gas is introduced from the upper part of the body part 78, the liquefied recovery liquid is discharged from the bottom part, and the body part 78 is discharged. The heat transfer tube 79 in the inside is connected to the refrigerator 80, and the low-temperature refrigerant from the refrigerator 80 flows through the heat transfer tube 79 to condense and liquefy the collected gas passing through the body 78.

Circuit 7 Downstream of Gas Liquefaction Heat Exchanger 75
At 0, a pressure gauge 82 and a pressure switch 83 are provided to control the opening and closing of the pressure holding on-off valve 76.

An electromagnetic valve 81 for controlling the circulation of the refrigerant is connected to the refrigerator 80 and the heat transfer tube 79, and the pressure switch (not shown) in the refrigerator 80 controls the refrigerator 80 ON-OFF. Has become.

The liquefaction unit C shown in FIG.
Is accommodated in the casing 10C as shown in FIG.

In FIG. 7, (b) is a front view,
(A) is a left side view, and (c) is a right side view.

As shown in FIG. 7B, the casing 10
On the front surface of C, the pressure gauge 83 described in FIG. 3 and a main valve 84 for introducing gas pressure to the pressure gauge 83 are arranged.
As shown in FIG. 7A, an inlet-side connection port 7 for connecting to the compression unit B is provided on the left side surface of the casing 10C.
2C, a section 90C is provided in which an inlet-side main valve 73C that is opened and closed by manual operation is arranged, and an outlet for connecting to the storage tank unit D is provided on the right side surface of the casing 10C as shown in FIG. A section 90D is provided in which a side connection port 72D and an outlet side main valve 73D which is manually opened and closed are provided. In the section 90D, a vacuum pump connection port 91D branched from the circuit 70 shown in FIG. A valve 92D is provided, and a wiring connection port 95F for connecting to the control unit F is provided.

Casters 36 for transport are provided at the bottom of the casing 10C, and eyebolts 37 for lifting with wires or the like are provided at the four corners of the top surface.

(D) Storage Tank Unit D As shown in FIG. 4, the storage tank unit D has an inlet-side connection port 102D for connecting a connection hose 71D with the liquefaction unit C side, and a connection hose 111E on the vaporization unit E side. And a storage tank 105 that insulates and stores the recovered liquid is connected to a pipe 100 that connects the outlet side connection port 102 </ b> E.

(E) Evaporation unit E As also shown in FIG. 4, the inlet side connection port 112E for connecting the connection hose 111E to the storage tank unit D side.
Connecting hose 111A to the device side for filling the insulating gas
In the circuit 110 between the outlet side connection port 112A and the inlet side main valve 113E, the inlet side opening / closing control valve 114, the check valve 115, the carburetor 116, the outlet side opening / closing control valve 117, the pressure for charging pressure adjustment. The regulating valve 118, the dryer 119, the filter 120, and the outlet side main valve 113A are connected to form the vaporizing unit E.

The vaporizer 116 is connected to the circuit 110,
A vaporizing tank 122 for introducing a recovered liquid from an upstream side and sending out a vaporized gas to a downstream side, and a water heater 124 for supplying hot water of brine to a heat transfer coil 123 provided in the vaporizing tank 122 are provided. A hot water circulation pump 125 for circulating the hot water in the water heater 124 by connecting the heat coil 123 and the water heater 124 is provided.

The vaporization tank 122 is connected to a float switch 126 for controlling the liquid level and is provided with a level switch 127, so that the inlet side opening / closing control valve controls the collected liquid level in the vaporization tank 112 to a predetermined level or more. 114 is controlled to open and close.

The water heater 124 is provided with a heater 130, and the heater 130 is controlled by a thermostat 131 so that the hot water maintains a predetermined temperature (30 to 40 ° C.).

Further, the air release pipe 1 is connected to the water heater 124.
32 and a liquid level switch 133 are provided so that the brine is appropriately changed from the heat transfer coil 123 of the vaporization tank 122.
Can be supplied.

The vaporization tank 122 has a thermometer 135
A pressure gauge 136 and a pressure switch 137 are provided in the circuit 110 on the downstream side of the vaporization tank 122 so that the pressure of the vaporized recovered gas is 10 kg / cm ² or more and the tank 1
The outlet side opening / closing control valve 117 is controlled so that the temperature in the inside 22 becomes 30 ° C. or more, and the amount of heat input into the vaporization tank 122 per unit time is controlled.

Further, the pressure reducing valve 118 adjusts the pressure on the downstream side in accordance with the filling pressure into the sealing device. On the downstream side of the filter 120, a pressure gauge 140 for detecting a filling pressure into the sealing device is provided.

The storage tank unit D and the vaporizing unit E described in FIG. 4 are housed in the casing 10 as described in FIGS. In this case, the storage tank 1 of the storage tank unit D depends on the amount of insulating gas to be recovered.
Since the capacity of the unit 05 changes, both units D and E may be either integral or split, and may not be housed in the casing. This casing 10D,
Although 10E (not shown) is not described in the present embodiment, it is needless to say that the casing 10E has the same configuration as the casing 10 described with reference to FIGS.

(F) Control Unit In FIGS. 1 to 7, the vacuum pump unit A, the compression unit B, the liquefaction unit C, the storage tank unit D, and the vaporization unit E have been described.
The electronic components such as switches, solenoid valves, and motors for controlling the operation of these units A to E are collectively controlled.

In FIG. 8, (b) is a front view,
(A) is a left side view, and (c) shows the control panel 152 when the panel 151 of the operation panel 150 is opened.

First, as shown in FIG. 8 (b), the casing 10F has a lower front surface extending from the wiring connection ports 35F, 65F, 95F, etc. of the units A to E described with reference to FIGS. And a power supply wiring port 156 for introducing a main power cable are provided.

Although not described in detail, a sequence circuit incorporating a relay switch, a timer, and the like for operating each unit is provided in the casing 10F to control the operation of the motors, solenoid valves, etc. of the units A to E. It has become.

In order to allow anyone to easily operate the operation control status, a panel 151 of the operation panel 150 is provided with a lamp 158 for displaying the operation status and an operation button 160.

First, the operation button 160 includes a recovery operation button, a reset button, a stop button, and the like. A lamp 158 includes a power supply lamp, a lamp indicating that the insulating gas is being recovered at positive pressure / negative pressure, and a vacuum. For warning the operation status of each of the units A to E, such as a pulling operation lamp, a vacuum pump overload lamp of the unit A, a compressor overload lamp of the unit B, a refrigerator overload lamp of the unit C, and a vaporizer abnormality lamp of the unit E. Ramp 158
The normal or abnormal status can be identified by blinking lights or lighting of different colors.

When the panel 151 is opened, FIG.
The control panel 152 shown in FIG.
52 includes various breakers 161, switches 162, and timers 16.
3. A connection terminal 164 and the like are arranged.

Although not shown in FIG. 8A, the above-described wiring cable and main power supply cable are extended from the rear surface of the casing 10F to the front surface, and are connected to the front wiring connection port 155F and the power supply wiring port. A housing 166 is formed at the rear in the casing 10F so that the cable can be connected to the cable 156, so that the cable does not become an obstacle when a person operates on the front. In addition, since each of the units A to E is a split type, these cables are configured such that the back surface of the casing 10F is opened so that the cables can be collectively stored in the storage unit 166 of the control unit F, and the connection hoses 11A, B, 41C, 71D, 111
E and A can be stored in the storage section 166 to enhance the transportability of the units A to F.

[0082]

In summary, according to the present invention, in recovering insulating gas from an insulating gas filling device such as a transformer, the device is divided into a vacuum pump unit, a compression unit, a liquefaction unit, and a vaporization unit, and the operation of these units is controlled. By providing the control unit independently, each unit can be made compact and excellent in transportability, and the collection operation can be performed easily by monitoring only the control unit. I can do it.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a vacuum pump unit A showing one embodiment of the present invention.

FIG. 2 is a circuit diagram of a compression unit B showing one embodiment of the present invention.

FIG. 3 is a circuit diagram of a liquefaction unit C showing one embodiment of the present invention.

FIG. 4 is a circuit diagram of a storage tank D and a vaporization unit E showing one embodiment of the present invention.

FIG. 5 is an external view of a vacuum pump unit A of FIG.

FIG. 6 is an external view of a compression unit B of FIG.

FIG. 7 is an external view of the liquefaction unit C of FIG.

FIG. 8 is an external view of a control unit F showing one embodiment of the present invention.

[Explanation of symbols]

 A vacuum pump unit B compression unit C liquefaction unit D storage tank E vaporization unit F control unit

Continued on the front page (72) Inventor Takashi Matsuzaka 336 Tatehara, Fuji City, Shizuoka Prefecture Toshiba FEC Corporation (72) Inventor Noriaki Inoue 336 Tatehara Field, Fuji City, Shizuoka Prefecture Toshiba FEC Corporation ( 72) Inventor Ryoichi Sato 336 Tatehara, Fuji City, Shizuoka Prefecture Toshiba FEC Corporation

Claims (28)

[Claims] 1. A vacuum pump unit for sucking and sending an insulating gas from an insulating gas filling device, a compression unit for compressing the collected gas sent, a liquefaction unit for cooling and condensing and liquefying the compressed collected gas, A storage tank for enclosing and storing the liquefied collected liquid, a vaporizing unit for heating and vaporizing the collected liquid sent from the enclosed storage tank and sending it to an insulating gas sealing device, and a control unit for controlling the devices of these units. An insulating gas recovery and filling device characterized by comprising: 2. A main circuit for sending an insulating gas from an inlet side to an outlet side via a vacuum pump, and a bypass circuit for the vacuum pump. The gas pressure on the inlet side is detected, and the pressure is higher than a predetermined value. An insulating gas recovery device comprising a vacuum pump unit including: a flow path switching unit that bypasses the main circuit when the main circuit is bypassed and switches to the bypass circuit, and when low, switches to the vacuum pump of the main circuit. 3. A main circuit having a vacuum pump connected between an inlet-side connection port for connecting a connection hose to an insulating gas charging device and an outlet-side connection port for connecting a connection hose to a compressor unit. A bypass circuit for bypassing the vacuum pump of the main circuit, a flow path switching means for detecting the gas pressure on the inlet side and switching to the main circuit of the vacuum pump when the pressure is higher than a predetermined value. Gas recovery device comprising a vacuum pump unit. 4. An inlet-side main valve and a pressure-regulating valve between an inlet-side connecting port for connecting a connecting hose to an insulating gas filling device and an outlet-side connecting port for connecting a connecting hose to a compressor unit side. , A main circuit to which a vacuum pump, a cushion tank, and an outlet side main valve are connected, a bypass circuit that bypasses a pressure regulating valve and a vacuum pump of the main circuit, and a flow of gas from an inlet side to one of the main circuit or the bypass circuit. And a pressure detecting means for controlling a flow path switching valve that detects a gas pressure on the circuit inlet side and switches to a bypass circuit when the pressure is higher than a predetermined pressure, and switches to a main circuit when the pressure is lower than a predetermined pressure. Insulating gas recovery device comprising a pump unit. 5. A pressure switch on the circuit inlet side, and a solenoid valve at each of the inlets of the main circuit and the bypass circuit, and control means for controlling the opening and closing of both solenoid valves by the pressure switch. The insulating gas recovery device according to any one of the above. 6. The insulating gas recovery device according to claim 5, wherein a safety valve for releasing the insulating gas is provided between the flow path switching valve and the pressure regulating valve. 7. A vacuum pump connection port for evacuating the main circuit and a manually operated stop valve, each of which is branched from a main circuit of an inlet side and an outlet side connection port.
An insulating gas recovery device as described in the above. 8. An inlet-side main valve and a pressure-regulating valve between an inlet-side connecting port for connecting a connecting hose to an insulating gas filling device and an outlet-side connecting port for connecting a connecting hose to a compressor unit side. A main circuit that communicates with the vacuum pump, cushion tank, and outlet side main valve, a bypass circuit that bypasses the main circuit of the pressure adjustment valve and the vacuum pump, A flow path switching valve for switching to flow to one of a circuit and a bypass circuit, and a vacuum pump connection port on an inlet side and an outlet side branched from a main circuit of an inlet side connection port and an outlet side connection port, respectively, and a manual operation. An insulating gas recovery device configured with a vacuum pump unit connected to a stop valve and installed in a casing configured to transport these components. 9. On one side surface of the casing, a section provided adjacent to the inlet side connection port and the inlet side main valve and the inlet side vacuum pump connection port and its stop valve are provided on the other side surface of the casing. 9. The insulating gas recovery apparatus according to claim 8, wherein a section is provided in which an outlet side connection port and an outlet side main valve and an outlet side vacuum evacuation pump connection port and its stop valve are arranged adjacent to each other. 10. A circuit between an inlet-side connection port for connecting a connection hose on the vacuum pump unit side and an outlet-side connection port for connecting a connection hose on the liquefaction unit side. Gas recovery device with compressor and outlet unit provided with compressor and compressor unit. 11. A suction pressure switch is provided on the inlet side of the gas compressor in the circuit, and a discharge pressure switch is provided on the outlet side of the gas compressor.
The insulating gas recovery device according to claim 10, further comprising control means for controlling operation of the compressor by the pressure switch. 12. The insulating gas recovery apparatus according to claim 10, wherein a vacuum pump connection port branched from a pipe between the outlet side main valve and the outlet side connection port of the circuit and a manually operated stop valve are constituted. . 13. A circuit between an inlet-side connection port for connecting a connection hose on the vacuum pump unit side and an outlet-side connection port for connecting a connection hose on the liquefaction unit side;
The decompression device, the gas compressor, and the outlet side main valve are connected, and the vacuum pump connection port branched from the piping between the outlet side main valve and the outlet side connection port and the manually operated stop valve are connected, An insulating gas recovery device in which a compressor unit is configured by installing them in a casing configured to be transportable. 14. A section in which an inlet-side connection port and an inlet-side main valve are arranged adjacent to one side surface of a casing, and an outlet-side connection port and an outlet side main valve, and an outlet side, on the other side surface of the casing. 14. The insulating gas recovery apparatus according to claim 13, further comprising a section in which the vacuum pump connection port and the stop valve thereof are disposed adjacent to each other. 15. A circuit between an inlet connection port for connecting a connection hose to the compressor unit side and an outlet connection port for connecting a connection hose to the storage tank unit side has an inlet side main valve and a gas. An insulating gas recovery device that forms a liquefaction unit by connecting a liquefaction heat exchanger and a pressure holding on-off valve. 16. A pressure switch for detecting a pressure at an outlet side of a gas liquefaction heat exchanger in a circuit, and the pressure switch controls a pressure holding opening / closing valve to open when the pressure is higher than a predetermined value and close when the pressure is lower than a predetermined value. 2. A control device comprising:
5. The insulating gas recovery device according to 5. 17. The heat exchanger for gas liquefaction is constituted by a shell-and-coil type heat exchanger, provided with a refrigerator having a coil of the heat exchanger as an evaporator, and the refrigerator having a pressure on a low pressure side of a refrigeration cycle. The insulating gas recovery device according to claim 15, further comprising control means for controlling operation by a switch. 18. The insulating gas recovery apparatus according to claim 15, wherein a circuit is diverged from a circuit between the outlet side main valve and the outlet side connection port, and a vacuum pump connection port and a manually operated stop valve are provided. 19. A circuit between an inlet-side connection port for connecting a connection hose to the compressor unit side and an outlet-side connection port for connecting a connection hose to the storage tank side; Heat exchanger, pressure on / off valve connected, branch from the outlet side main valve and outlet side connection circuit, connect the vacuum pump connection port and its stop valve, and further to the gas liquefaction heat exchanger An insulating gas recovery device connected to a refrigerator and installed in a casing that can transport these components to form a liquefaction unit. 20. A section in which an inlet-side connection port and an inlet-side main valve are arranged adjacent to one side surface of a casing, and an outlet-side connection port and an outlet side main valve, and an outlet side, on the other side surface of the casing. 20. The insulating gas recovery apparatus according to claim 19, further comprising a section in which the vacuum pump connection port and its stop valve are disposed adjacent to each other. 21. A storage tank for storing liquid is connected to a pipe between an inlet connection port connecting a connection hose to the liquefaction unit and an outlet connection port connecting a connection hose to the vaporization unit. An insulating gas recovery device that constitutes a storage tank. 22. An inlet-side main valve is provided in a circuit between an inlet-side connection port for connecting a connection hose to a storage tank side and an outlet-side connection port for connecting a connection hose to a device side to be filled with insulating gas. , Inlet side open / close control valve, vaporizer, outlet side open / close control valve,
An insulating gas filling device that comprises a vaporization unit by connecting a pressure adjusting valve for adjusting the filling pressure and an outlet side main valve. 23. The insulating gas filling apparatus according to claim 22, wherein the opening / closing control valve on the inlet side of the vaporizer is controlled to open / close according to the level of the recovered liquid in the vaporizer provided in the vaporizer. 24. An open / close control valve of an outlet side of a vaporizer is controlled to be opened and closed by a temperature gauge and a pressure switch provided on a vaporized gas temperature inside the vaporizer and a recovered vaporized gas outlet side of the vaporizer. Insulation gas filling equipment. 25. The insulating gas filling apparatus according to claim 22, wherein a dryer and a filter are connected to a circuit downstream of the pressure regulating valve for regulating the filling pressure. 26. A vaporizer comprising: a vaporization tank for introducing a stored recovery liquid; and a heat transfer coil provided in the tank, wherein a water heater for supplying and circulating hot water is connected to the heat transfer coil. Item 23. An insulating gas filling device according to Item 22. 27. An operation panel for operating a vacuum pump unit, a compression unit, a liquefaction unit, a vaporization unit and the like is provided on the front side of the casing, and the operation panel has
An operation switch and a display lamp for displaying the operation status are provided,
An insulating gas recovery and filling apparatus comprising a control unit provided with a wiring connection port for connecting and controlling wiring cables from each of the above units collectively. 28. The insulating gas according to claim 27, further comprising a storage portion for guiding a wiring cable from a rear side to a front side and housing a connection hose connecting between the units at a lower portion of a casing of the control unit. Collection and filling equipment.