JPH07293735A - Vacuum valve controller - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate the water level detection pipe, prevent malfunction of the control device when the valve body is closed, and operate the valve body smoothly. In a control device 5 for controlling the vacuum valve 1, a throttle valve 32 is provided in the middle of a gas pressure introduction pipe 31 communicating with the pressure detection chamber 6, and the gas pressure introduction pipe 31 is connected to a vacuum downstream of the vacuum valve 1. It was connected to the valve suction pipe 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a controller for a vacuum valve used in a sewer line using a vacuum type waste water collecting system.

[0002]

2. Description of the Related Art As a conventional vacuum type sewage collection system, for example, there is one described in Japanese Patent Laid-Open No. 2-292426, and a control device for a vacuum valve in a vacuum sewer line is as shown in FIG. Met. In FIG. 2, the vacuum valve 1 has one end communicating with the vacuum waste water pipe 2 and the other end communicating with the vacuum valve suction pipe 3. The vacuum sewage pipe 2 communicates with a vacuum source (not shown) of a vacuum pumping station, and the vacuum valve suction pipe 3 communicates with a sewage basin where the natural flow-down pipes of each household gather. Vacuum valve 1
The valve element 4 disposed inside the valve is movable back and forth between a closed state in which it is pressed against the valve seat 1b in the valve box 1a and an open state in which it is separated from the valve seat 1b. Inside the cylinder chamber 1c formed in the upper part of the valve box 1a, a piston 1d connected to the valve body 4 is arranged, and a spring 1e for urging the valve body 4 in the closing direction is provided on the back surface of the piston 1d. There is.

The control device 5 for the vacuum valve 1 includes a pressure detection chamber 6
, An atmospheric pressure chamber 8 adjacent to the pressure detection chamber 6 via a sub-diaphragm 7, a variable vacuum chamber 10 communicating with the atmospheric pressure chamber 8 through a small valve port 9, and a variable vacuum chamber 10 connected to the main diaphragm 1
1 adjacent to the constant vacuum chamber 12, a distribution chamber 14 adjacent to the constant vacuum chamber 12 via a partition wall 13, a passage 16 communicating with the distribution chamber 14 via the large valve port 15, and a passage 16 communicating with the passage 16. In addition, the pressure detection chamber 6 is provided with an air introduction hole 17 that opens to face the large valve opening 15 and the gas pressure introduction pipe 18 is provided.
Through to the water level detecting pipe 18a of the sewage basin S, and the atmosphere introducing hole 17 is open to the atmosphere through a ventilation pipe 19.

The atmospheric pressure chamber 8 communicates with the atmosphere introducing hole 17 through a ventilation path 20, and the distribution chamber 14 communicates with the constant vacuum chamber 12 and the variable vacuum chamber 10 through a pipe 21. A flow rate adjusting valve 22 is provided in the middle of a pipe 21 communicating with the variable vacuum chamber 10. The variable vacuum chamber 10 is provided with a valve device 23 that opens and closes the small valve opening 9 in conjunction with the sub diaphragm 7. A valve rod 24, which is arranged so as to pass through a partition wall 13 that separates the constant vacuum chamber 12 and the distribution chamber 14 in a retractable manner, connects one end to the main diaphragm 11 and opens and closes the large valve port 15 at the other end.
5, the partition wall 13 and the main diaphragm 11 are provided.
A coil spring 26 interposed between the valves 25 urges the valve 25 in the closing direction of the large valve opening 15. The valve 25 extends and retracts over a position where the large valve port 15 is closed and a position where the opening of the atmosphere introduction hole 17 is closed. The distribution chamber 14 of the control device 5 communicates with the vacuum waste water pipe 2 through the first conduit 27, and the rear chamber of the cylinder chamber 1c in which the spring 1e of the vacuum valve 1 is present communicates with the passage 16 through the second conduit 28. In addition, a ventilation pipe 19 is provided in the front chamber of the cylinder chamber 1c separated from the piston 1d.
An intake / exhaust conduit 29 that branches from is communicated.

In this structure, when the amount of dirty water in the dirty water tank S is small, the valve body 4 is in a closed state in which it is pressed against the valve seat 1b, the valve device 23 closes the small valve opening 9, and the valve 25 is the large valve opening. Block 15 In this state, the vacuum pressure in the vacuum waste water pipe 2 acts on the distribution chamber 14 through the first conduit 27,
Further, it acts on the variable vacuum chamber 10 and the constant vacuum chamber 12 through the pipe 21. Therefore, the variable vacuum chamber 10 and the constant vacuum chamber 12 have the same pressure, and the valve 25 closes the large valve opening 15 under the biasing force of the coil spring 26. On the other hand, the atmospheric pressure in the air introduction hole 17 acts on the atmospheric pressure chamber 8 through the ventilation passage 20, the sub diaphragm 7 is separated from the valve device 23, and the valve device 23 closes the small valve opening 9.

When the dirty water is collected in the dirty water tank S, the internal pressure of the water level detecting pipe 18a rises as the water level rises, the air pressure acting on the pressure detecting chamber 6 through the gas pressure introducing pipe 18 increases, and the sub diaphragm 7 becomes The valve device 23 is displaced by being displaced toward the atmospheric pressure chamber 8 side, and the valve device 23 opens the small valve opening 9. When the small valve opening 9 is opened, the atmospheric pressure acting on the atmospheric pressure chamber 8 acts on the variable vacuum chamber 10, the main diaphragm 11 is displaced toward the constant vacuum chamber 12 side, and the valve rod 24 is biased by the coil spring 26. The valve 25 separates from the large valve opening 15 to open the large valve opening 15 and closes the opening of the atmosphere introduction hole 17 facing the large valve opening 15.

[0007] Therefore, the distribution chamber 1 through the first conduit 27
The vacuum pressure of the vacuum waste water pipe 2 acting on 4 acts on the passage 16 through the large valve port 15, and further acts on the rear chamber of the cylinder chamber 1c through the second conduit 28. On the other hand, the cylinder chamber 1c
The atmospheric pressure of the ventilation pipe 19 acts on the front chamber of the cylinder chamber through the intake and exhaust pipes 29, and the piston is generated by the differential pressure between the atmospheric pressure acting on the front chamber of the cylinder chamber 1c and the vacuum pressure acting on the rear chamber of the cylinder chamber 1c. 1d retracts against the urging force of the spring 1c, and the valve body 4 is separated from the valve seat 1b and is in the open state. In this state, the sewage accumulated in the sewage basin is sucked up through the vacuum valve suction pipe 3 and the vacuum sewage pipe 1.

When the water level in the sewage basin drops due to suction,
As the internal pressure of the water level detection pipe 18a decreases, the air pressure acting on the pressure detection chamber 6 through the gas pressure introduction pipe 18 decreases, and the sub diaphragm 7 is pushed by the atmospheric pressure of the atmospheric pressure chamber 8 to return to the normal state. , The pressing force on the valve device 23 is released, and the valve device 23 closes the small valve opening 9. In this state, the variable vacuum chamber 10 becomes a vacuum pressure, the main diaphragm 11 receives the urging force of the coil spring 26 to return to the normal state, and the valve 25 closes the large valve opening 15. For this reason,
Atmospheric pressure acts on both the front chamber and the rear chamber of the cylinder chamber 1c, and the valve body 4 is moved to the valve seat 1b by the urging force of the spring 1e.
Closes to the position where it presses against and returns to the normal state.

[0009]

However, in the above-mentioned conventional structure, the suction of the sewage from the sewage basin is completed,
When the valve 25 separates from the opening of the atmosphere introducing hole 17 and closes the large valve port 15, the second conduit 28 is provided in the rear chamber of the cylinder chamber 1c.
Air flows in from the air introduction hole 17 through the passage 16. At this time, the ventilation pipe 19 communicating with the air introduction hole 17
If the pipeline is long or bent, the inside of the atmosphere introduction hole 17 becomes negative due to the pressure loss. This negative pressure acts on the atmospheric pressure chamber 8 through the ventilation passage 20, and the sub diaphragm 7
Is sucked and displaced to the atmospheric pressure chamber 8 side, and the state is the same as when the water level in the sewage basin is detected, and the valve device 23 malfunctions. For this reason, there is a problem that the valve body 4 causes a phenomenon called double cycling, that is, the valve body 4 that is once closed is opened again, and malfunctions. Further, although the water level detection pipe 18a is provided in order to detect the water level of the sewage basin S, simplification of the device has been required in order to arrange the device in a narrow limited space.

The present invention solves the above-mentioned problems, and eliminates the water level detection pipe, prevents malfunction of the control device when the valve body is closed, and enables the valve body to operate smoothly. An object is to provide a control device.

[0011]

In order to solve the above-mentioned problems, a control device for a vacuum valve according to the present invention comprises a vacuum pressure passage system communicating with a vacuum waste water pipe connected to the vacuum valve and an atmospheric pressure control system. An atmospheric pressure passage system communicating with the passage, a passage communicating with the rear chamber of the cylinder chamber of the vacuum valve, a large valve opening serving as a connection port of the vacuum pressure passage system to this passage, and a connection of the atmospheric pressure passage system to the passage. Atmosphere introducing hole that makes a mouth and opens facing the large valve opening, main valve means that moves back and forth over the position that closes the large valve opening and the position that closes the opening of the atmosphere introducing hole, and the constant pressure of the vacuum pressure channel system. A main diaphragm that separates the vacuum chamber from the variable vacuum chamber and receives the pressure of the variable vacuum chamber to press the main valve means toward the opening of the atmosphere introduction hole, and an atmospheric pressure chamber that communicates with the variable vacuum chamber via a small valve port. And a sub-valve means for opening and closing a small valve opening arranged in the atmospheric pressure chamber, and a pressure detection chamber A sub-diaphragm that partitions the air pressure chamber from the pressure detection chamber and urges the sub-valve means in the opening direction; a ventilation pipe that forms a part of the atmospheric pressure flow path system and communicates with the atmosphere introduction hole; In a control device provided with an intake / exhaust conduit that branches from the middle of the flow path and communicates with the front chamber of the cylinder chamber of the vacuum valve, a gas pressure introducing pipe communicating with the pressure detection chamber is provided with a throttling means in the middle thereof. The inlet pipe is connected to the vacuum valve suction pipe upstream of the vacuum valve, and the lower end opening of the vacuum valve suction pipe is formed such that the whole or part of the opening peripheral edge is inclined at an appropriate angle with respect to the facing water surface. Is.

[0012]

With the above-described structure, the internal pressure rises as the water level in the vacuum valve suction pipe rises, and when the rising air pressure is transmitted to the pressure detection chamber through the throttle means and the gas pressure introduction pipe, the sub-diaphragm moves to the atmospheric pressure chamber. It is displaced to the side to activate the auxiliary valve means. When the vacuum valve is opened by this operation and the vacuum dirty water pipe and the vacuum valve suction pipe are communicated with each other, the dirty water is sucked and the air in the pressure detection chamber is sucked through the gas pressure introducing pipe. When the air is sucked out, the sub-diaphragm works in the direction of returning (closing) the sub-valve, so that the main valve means returns and the vacuum valve closes.

At this time, the throttle means adjusts the suction speed of the air and causes a delay until the pressure in the pressure detection chamber becomes equal to the vacuum pressure of the vacuum valve suction pipe, so that the subdiaphragm returns too early. The opening time of the main valve means does not become too short.

When the piston in the cylinder chamber moves to the front chamber side when the vacuum valve is closed, the atmosphere of the atmospheric pressure passage system flows into the rear chamber of the cylinder chamber from the atmosphere introduction hole through the passage.

At this time, even if the inside of the atmosphere introducing hole becomes a negative pressure as in the conventional case and the negative pressure acts on the atmospheric pressure chamber through the ventilation passage,
Since the vacuum pressure acts in the pressure detection chamber via the gas pressure introduction pipe, the auxiliary diaphragm does not malfunction and the auxiliary valve means is opened unlike the conventional case, and the vacuum valve is smoothly closed. be able to. Further, unlike the conventional case, it is not necessary to provide a water level detecting pipe, and the structure is simplified.

Further, since the lower end opening of the vacuum valve suction pipe is inclined at an appropriate angle with respect to the water surface facing the whole or a part of the opening peripheral edge, the lower end of the vacuum valve suction pipe is lowered as the water level decreases. When the opening is exposed on the water, the entire periphery of the opening is not exposed at one time, and the lower end opening is partially opened on the water. Therefore, when the suction of the dirty water is completed, air flows into the vacuum valve suction pipe from a part of the lower end opening exposed on the water, and the dirty water flows in the vacuum valve suction pipe as a gas-liquid two-phase flow. When the suction of the dirty water is completed by the closing operation, an appropriate gap is present in the vertical direction between the water surface and the lower end opening of the vacuum valve suction pipe, at least in a part of the peripheral portion of the opening. Therefore, at the end of the suction, the dirty water remaining in the vacuum valve suction pipe flows out from the gap to the outside of the pipe, and the atmosphere flows into the pipe from the gap to reach the atmospheric pressure, thereby reliably returning the pressure detection chamber to the atmospheric pressure. be able to.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Members having the same functions as those described above with reference to FIG. 2 are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 1, a gas pressure introducing pipe 31 communicating with the pressure detecting chamber 6 communicates with the vacuum valve suction pipe 3, and a throttle valve 32 forming a throttling means is interposed in the gas pressure introducing pipe 31. is doing. An orifice may be provided instead of the throttle valve 32.

Further, the lower end opening of the vacuum valve suction pipe 3 has a cut end in which the entire opening peripheral edge portion 3a is inclined at an appropriate angle with respect to the facing water surface WF in the wastewater basin S. The opening peripheral edge portion 3a may be provided with a notch so that only a part thereof is inclined with respect to the water surface WF.

According to this structure, the water level in the sewage basin S rises, the internal pressure of the vacuum valve suction pipe 3 rises, and the rising air pressure is transmitted to the pressure detection chamber 6 through the throttle valve 32 and the gas pressure introduction pipe 31. Then, the sub-diaphragm 7 is displaced toward the atmospheric pressure chamber 8 side to operate the valve device 23. When the valve 25 of the control device 5 is actuated by this operation and the vacuum valve 1 is opened, the vacuum valve suction pipe 3 and the vacuum sewage pipe 2 are communicated with each other, sewage is sucked out, and the gas pressure introduction pipe 31 and the throttle valve 32 are connected. The air in the pressure detection chamber 6 is sucked through. When the air is sucked out, the auxiliary diaphragm 7 restores (closes) the valve device 23.
Valve 25 is restored and the vacuum valve 1 is closed.

At this time, the throttle valve 32 adjusts the suction speed of the air and delays until the pressure in the pressure detection chamber 6 becomes equal to the vacuum pressure in the vacuum valve suction pipe 3, so that the auxiliary diaphragm 7 returns. Is not premature and the opening time of the valve 25 is too short.

When the piston 1d in the cylinder chamber 1c moves to the front chamber side when the vacuum valve 1 is closed, the cylinder chamber 1
Atmosphere of the atmospheric pressure channel system flows into the rear chamber of c from the atmospheric air introduction hole 17 through the passage 20.

At this time, even if the inside of the atmosphere introducing hole 17 becomes a negative pressure and the negative pressure acts on the atmospheric pressure chamber 8 through the air passage as in the conventional case, the gas pressure introducing pipe 31 is provided in the pressure detecting chamber 6 through the gas pressure introducing pipe 31. Since the vacuum pressure is applied, the auxiliary diaphragm 7 does not malfunction to open the valve device 23 as in the conventional case, and the vacuum valve 1 can be smoothly closed. Further, unlike the conventional case, it is not necessary to provide a water level detecting pipe, and the structure is simplified.

The lower end opening of the vacuum valve suction pipe 3 is entirely or partially inclined at an appropriate angle with respect to the facing water surface WF, so that the suction of the vacuum valve is accompanied by a decrease in the water level. When the lower end opening of the pipe 3 is exposed on the water, the entire opening peripheral edge portion 3a is not exposed at one time, and the lower end opening partially opens on the water.

Therefore, when the suction of the dirty water is completed,
Air flows into the vacuum valve suction pipe 3 from a part of the lower end opening exposed on the water, and the dirty water flows in the vacuum valve suction pipe 3 in a gas-liquid two-phase flow. At the time of completion, between the water surface WF and the lower end opening of the vacuum valve suction pipe 3, at least a part of the opening peripheral portion 3a has an appropriate vertical gap.

Therefore, at the end of suction, the dirty water remaining in the vacuum valve suction pipe 3 flows out of the vacuum valve suction pipe 3 through the gap, and at the same time, the atmosphere flows in through the gap and the pressure in the pipe becomes atmospheric pressure. As a result, the pressure detection chamber 6 can be reliably returned to atmospheric pressure.

[0027]

As described above, according to the present invention, by connecting the pressure detection chamber and the vacuum valve suction pipe with the gas pressure introduction pipe having the throttling means, the conventional water level detection pipe is omitted. Moreover, even if the inside of the atmosphere introduction hole becomes negative pressure and negative pressure acts on the atmospheric pressure chamber through the ventilation passage as in the conventional case, vacuum pressure acts on the pressure detection chamber via the atmospheric pressure introduction pipe. Therefore, unlike the conventional case, the auxiliary diaphragm does not malfunction to open the auxiliary valve means, and the vacuum valve can be smoothly closed.

Further, since the lower end opening of the vacuum valve suction pipe is inclined at an appropriate angle in the whole or a part of the opening peripheral edge portion with respect to the facing water surface, at the end of suction,
There is a gap between the lower end opening and the water surface in at least a part of the opening peripheral portion, and the dirty water remaining in the vacuum valve suction pipe flows out of the vacuum valve suction pipe from the gap,
Atmospheric pressure flows in from the gap to bring the inside of the pipe to atmospheric pressure, and the pressure detection chamber can be reliably returned to atmospheric pressure.

[Brief description of drawings]

FIG. 1 is an overall cross-sectional view of a control device according to an embodiment of the present invention.

FIG. 2 is an overall sectional view showing a conventional control device.

[Explanation of symbols]

 1 Vacuum Valve 1c Cylinder Chamber 4 Valve Body 5 Control Device 6 Pressure Detection Chamber 7 Sub Diaphragm 8 Atmospheric Pressure Chamber 9 Small Valve Port 10 Variable Vacuum Chamber 11 Main Diaphragm 16 Passage 17 Atmosphere Introduction Hole 23 Valve Device 25 Valve 29 Intake / Exhaust Conduit 31 Gas pressure introduction pipe 32 Throttle valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukihiro Yamamoto 1-1-1, Nakanomiya Oike, Hirakata City, Osaka Prefecture Kubota Hirakata Factory

Claims (1)

[Claims] 1. A vacuum pressure channel system communicating with a vacuum wastewater pipe connected to a vacuum valve, an atmospheric pressure channel system communicating with atmospheric pressure, and a channel communicating with a rear chamber of a cylinder chamber of the vacuum valve. A large valve port that forms a connection port of the vacuum pressure channel system to this passage,
An atmospheric air introduction hole which is a connection opening of the atmospheric pressure flow path system to the passage and opens facing the large valve opening, and a main opening and closing unit that closes the large valve opening and a position that closes the opening of the atmospheric air introduction hole. The valve means, the constant vacuum chamber of the vacuum pressure flow path system and the variable vacuum chamber are partitioned from each other, and the main valve means receives the pressure of the variable vacuum chamber and presses the main valve means toward the opening of the atmosphere introduction hole. An atmospheric pressure chamber communicating through the valve port, a sub-valve means for opening and closing a small valve port arranged in the atmospheric pressure chamber, a pressure detecting chamber and an atmospheric pressure chamber are partitioned, and the sub-valve means receives pressure from the pressure detecting chamber. The sub-diaphragm that urges the valve in the opening direction, the ventilation pipe that forms a part of the atmospheric pressure passage system and communicates with the atmosphere introduction hole, and branches from the middle of the ventilation pipe to communicate with the front chamber of the vacuum valve cylinder chamber. In the control device including the intake and exhaust pipes, the gas pressure guide communicating with the pressure detection chamber A throttle means is provided in the middle of the pipe, and the gas pressure introduction pipe is connected to the vacuum valve suction pipe upstream of the vacuum valve, and the lower end opening of the vacuum valve suction pipe is the entire or peripheral edge of the opening with respect to the opposing water surface. A control device for a vacuum valve, characterized in that a part thereof is formed to be inclined at an appropriate angle.