JPH0893635A - Fluid pumping device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a compact pressure-feeding device capable of smoothly flowing a high-viscosity fluid, being sucked into a piston pump, and not interrupting the high-viscosity fluid to be pressure-fed. The purpose is to [Structure] First and second tanks 11, 1 for containing a fluid
2. First and second pumps 13, 1 having the same effective diameter
4. Third and fourth pumps 15, 1 having the same effective diameter
6, the first cylinder 1 that reciprocally drives the pumps 13 and 15
7. The second cylinder 18 that reciprocally drives the pumps 14 and 16 so as to be in opposite directions to the first cylinder 17, and the pumps 13 to 16 are horizontal and parallel to each other and for driving. The rods are arranged in a lower position than the tanks 11 and 12 with the rods facing the same direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid pressure-feeding device, and is particularly preferably used for simultaneously pressure-feeding two types of high-viscosity fluids such as a base resin and a curing agent.

[0002]

2. Description of the Related Art Conventionally, a piston pump has been used to pump a highly viscous fluid. FIG. 6 is a view showing a conventional high-viscosity fluid pressure-feeding device 80.

In FIG. 6, a pumping device 80 comprises two tanks 81 and 82 for storing a highly viscous fluid, piston pumps 83 and 84 for pumping a highly viscous fluid, and a piston pump 8.
Hydraulic cylinders 85 and 86 for respectively driving 3, 84,
And check valves 87 to 90 and the like.

The piston pumps 83, 84 and the hydraulic cylinders 85, 86 are vertically arranged between the two tanks 81, 82, and the rods of the hydraulic cylinders 85, 86 reciprocally drive in the vertical direction. Tank 81,
The high-viscosity fluid is sucked from 82 to the piston pumps 83 and 84, and the sucked high-viscosity fluid is transferred to the piston pumps 83 and 84.
It is sent from 84 to the pipe lines 91 and 92 by pressure.

[0005]

However, in the above-described conventional pumping device 80, the pipe lines from the tanks 81 and 82 to the piston pumps 83 and 84 are long and often bent, and this is a problem. The flow resistance of the high-viscosity fluid was poor due to the conduit resistance. Therefore, the piston pump 8
Highly viscous fluid is not smoothly sucked into 3, 84, and
The high-viscosity fluid pumped from 1, 92 may be interrupted.

Further, since the piston pumps 83 and 84 and the hydraulic cylinders 85 and 86 are arranged vertically,
Since the height of the device becomes large, it is difficult to make the entire device compact. Therefore, the device becomes large and the maneuverability is poor.

The present invention has been made in view of the above-mentioned problems, and has a compact structure in which the high-viscosity fluid smoothly flows, is sucked into the piston pump, and the high-viscosity fluid pressure-fed is not interrupted. An object of the present invention is to provide a pumping device capable of

[0008]

An apparatus according to the invention of claim 1 comprises a first tank and a second tank for containing a fluid,
A first piston pump and a second piston pump having the same effective diameter for pumping the fluid in the first tank, and a first piston pump having the same effective diameter for pumping the fluid in the second tank. A three-piston pump and a fourth piston pump; a first cylinder that reciprocally drives the first piston pump and the third piston pump; the second piston pump and the fourth piston pump;
A second cylinder that is reciprocally driven so as to be in mutually opposite directions, and the first piston pump, the second piston pump, the third piston pump, and the fourth piston pump are arranged in a horizontal direction. Of the first piston pump and the second piston pump, the rods for driving are parallel to each other and directed in the same direction, and are arranged at a position lower than the first tank and the second tank. Each suction port is connected to an outflow port provided at the bottom of the first tank, and each suction port of the third piston pump and the fourth piston pump is connected to the second port.
The first port is connected to an outlet provided at the bottom of the tank.
The discharge ports of the piston pump and the second piston pump are connected to each other and are connected to the first pipe line for pressure feeding, and the discharge ports of the third piston pump and the fourth piston pump are connected to each other. It is configured to be connected to the second pipeline for pressure feeding.

According to a second aspect of the present invention, in the device according to the first aspect,
The cylinder is arranged to face the first piston pump and the third piston pump, and the second cylinder is
The second piston pump and the fourth piston pump are arranged to face each other.

According to a third aspect of the present invention, there is provided the device according to the first aspect.
Two outlets are provided at the bottom of the tank, and the first
The intake ports of the piston pump and the second piston pump are located immediately below the two outlets, respectively, and the intake ports and the outlets are arranged in a direction from the outlets toward the inlets. It is connected by a straight pipe through a check valve that is a free flow.

[0011]

When the first piston pump and the third piston pump are moved in the extension direction by the driving of the first cylinder, the fluid stored in the first tank and the second tank moves the respective outlets, check valves, and suction ports. Through it, it is sucked into the pump chambers of the first piston pump and the third piston pump, respectively.

At this time, the second cylinder is driven in the reverse direction, whereby the fluid sucked into the pump chambers of the second piston pump and the fourth piston pump passes through the respective discharge ports and the check valve to the first cylinder. Pipe line 41 or second pipe line 4
2 is discharged.

When the first and second cylinders 18 reach their respective stroke ends, this time they are driven in the opposite directions,
The first to fourth piston pumps perform operations reverse to those described above, and the fluids in the first tank and the second tank are continuously discharged into the first pipeline and the second pipeline, respectively.

In the meantime, the fluid in the first tank is the first piston pump or the second piston pump located immediately below the outlet.
It flows to the suction port of the piston pump for the shortest distance and is smoothly sucked into each pump chamber.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view showing the outline of a pressure feeding device 1 according to the present invention, FIG. 2 is a plan view showing the outline of the pressure feeding device 1 according to the present invention, and FIG. 3 is an enlarged view of a part of FIG. 4 is an enlarged plan view showing a part of FIG. 2, and FIG. 5 is a block diagram showing a part of a fluid circuit of the pumping device 1. 1 to 4, some or all of unimportant devices, pipelines, structural members and the like are omitted in order to clarify the characteristic parts.

In these drawings, the pressure feeding device 1 includes a frame 10 provided with casters 8 and 9, a first tank 11, a second tank 12, a first pump 13, and a second pump 1.
4, third pump 15, fourth pump 16, first cylinder 1
7, a second cylinder 18 and the like are attached. In the present specification, the first tank and / or the second tank are “tanks”, the first to fourth pumps are “pumps”, and the first cylinders and / or the second cylinders are “cylinders”, respectively. I have something to say.

The first tank 11 and the second tank 12 temporarily store the high-viscosity fluid to be pumped, and heat the high-viscosity fluid as necessary to reduce the viscosity. These tanks 11 and 12 are wide-mouthed metal containers 111 and 121 that store high-viscosity fluids, lids 112 and 122 that hermetically close the openings at the upper ends of the containers 111 and 121, and the container 1
The pipes 113 and 123 for heat exchange are provided inside the pipes 11 and 121, respectively.

Two outlets 114 and 115 are provided on the bottom surface of the container 111 as outlets for the highly viscous fluid, and one outlet 124 is provided on the bottom surface of the container 121 as an outlet for the highly viscous fluid. It is provided. Although illustration is omitted, above the peripheral walls of the containers 111 and 121, a sensor for detecting the remaining amount of stored items and internal pressure, a socket for connecting compressed air for pressurization, and the containers 111, 12 are provided.
A flange or the like for fixing 1 to the frame 10 is attached. The tanks 11 and 12 are attached to the upper position of the frame 10 so as to be at the same height position and to penetrate the upper cover plate so that the lids 112 and 122 can be opened and closed from above. .

Each of the pumps 13 to 16 is a single-acting type plunger pump (piston pump), and the plungers 13a to 16a linearly reciprocate to suck or discharge a highly viscous fluid. In the first pump 13 and the second pump 14 connected to the first tank 11, the diameters of the plungers 13a and 14a are 38 mm, and the third pump 15 and the fourth pump 16 connected to the second tank 12 are The diameter of each of the plungers 15a and 16a is 25 mm.

These pumps 13 to 16 are arranged in a horizontal posture and parallel to each other below the first tank 11 and the second tank 12, and the plunger 1
3a to 16a are arranged in the same direction. First pump 13 and third pump 15, and second
The pump 14 and the fourth pump 16 are respectively set as a set and are arranged so as to be adjacent to each other, and the plungers 13a and 15a and the plungers 14a and 16 thereof are arranged.
The respective tip threaded portions of a are respectively screwed into the coupling members 19 and 20 and coupled so as to move integrally with each other in the axial direction.

First cylinder 17 and second cylinder 18
Are arranged so as to face the pumps 13, 15 or 14, 16, and the rod 17a of the first cylinder 17 is the connecting member 19 and the rod 18a of the second cylinder 18 is the connecting member 2
0 are respectively screwed and connected.

The suction port 131 of the first pump 13 is located immediately below one of the outlets 114 of the first tank 11, and between them, a check is made that the flow is a free flow in the direction from the outlet 114 to the suction port 131. They are connected via a valve 31 by a pipe line 39 which is straight in the vertical direction.

The discharge port 132 of the first pump 13 is connected to the first pipe line 41 for pressure feed by a check valve 35 which becomes a free flow in the direction from the discharge port 132 to the first pipe line 41.

Similarly, the suction port 141 of the second pump 14
Is located immediately below the other outlet 115 of the first tank 11, and a straight pipe in the vertical direction is provided between them via a check valve 32 that becomes a free flow in the direction from the outlet 115 to the inlet 141. It is connected by a path 40.

The discharge port 142 of the second pump 14 is connected to the first pipe line 41 for pressure feeding by a check valve 36 which becomes a free flow in the direction from the discharge port 142 to the first pipe line 41. Therefore, the high-viscosity fluids pumped from the first pump 13 and the second pump 14 are connected to the first conduit 41 so as to join together.

The suction port 151 of the third pump 15 and the suction port 161 of the fourth pump 16 are respectively the suction ports 151,
Check valve 33 that becomes a free flow in the direction of flowing into 161
It is connected to one outflow port 124 of the second tank 12 via 34.

The discharge port 152 of the third pump 15 and the discharge port 162 of the fourth pump 16 are respectively the discharge ports 152,
Check valve 3 which becomes a free flow in the direction outflowing from 162
It is connected to the second conduit 42 for pressure feeding via 7, 38.

The first cylinder 17 reciprocally drives the plungers 13a, 15a of the pumps 13, 15 via the connecting member 19, and the second cylinder 18 drives the plungers 14a, 16a of the pumps 14, 16 via the connecting member 20. Drive back and forth. At this time, the first cylinder 17 and the second cylinder 18
Is controlled by a direction switching valve (not shown) provided in the hydraulic unit 23 so that the movement directions of the reciprocating movements are opposite to each other.

As shown in FIGS. 1 and 2, the pressure feeding device 1 includes a first cylinder 17 and a second cylinder 18.
Hydraulic unit 23 for supplying pressure oil to the tank, an air compressor 24 for supplying compressed air to the first tank 11 and the second tank 12, a cleaning pump 25 for cleaning the pipeline, a cleaning tank 26 containing a cleaning liquid, a tank A hot water heater 27 for warming hot water circulated in the heating pipes 113, 123 provided at 11, 12 and a control panel 28 for controlling the entire pressure feeding device 1 are provided.

Further, as shown in FIG. 5, the pressure feeding device 1
The circulation lines 45 and 46, and the cleaning liquid injection line 4
7, reservoirs 61 and 62 for supplying lubricant to the pumps 13 to 16, a switching valve 63, a strainer 64, switching valves 65 and 66, check valves 67 to 69, a switching valve 70,
Pressure switches PS1 and PS2, pressure sensors SE1 and S
E2 and the like are provided.

The pumping device 1 is capable of operating all devices by supplying power from the outside, and is excellent in maneuverability in combination with the casters 8 and 9.

Next, the pressure feeding device 1 configured as described above.
The operation of will be described. The first tank 11 stores a main component of a two-liquid type lining resin material as a highly viscous fluid, the second tank 12 stores a curing agent thereof, and heating pipes 113 and 123 are respectively used to heat the main component as necessary. To raise the temperature,
In addition, compressed air is supplied to pressurize each high-viscosity fluid.

The first pump 13 and the third pump 15 perform the same operation by the first cylinder 17. Also, the second
The pump 14 and the fourth pump 16 perform the same operation by the second cylinder 18.

Referring particularly to FIG. 5, the rod 17a of the first cylinder 17 is driven to contract, and the plungers 13a and 15a are driven.
Is moved in the extension direction, the main agent and the curing agent stored in the first tank 11 and the second tank 12 are discharged from the outlets 114,
124, check valves 31, 33, suction ports 131, 151
Through each of the first and second pumps 13 and 15 to be sucked into the pump chambers.

At this time, the rod 18 of the second cylinder 18
a is driven to extend, whereby the plungers 14a and 16a
a moves in the contracting direction, and the main agent and the curing agent sucked into the pump chambers of the second pump 14 and the fourth pump 16 are
It is discharged to the first conduit 41 or the second conduit 42 through the discharge ports 142 and 162 and the check valves 36 and 38, and then,
It is pressure-fed to the static mixer 53 via the switching valve 51 and the manifold 52. The static mixer 53 mixes the base material and the curing agent, and the mixture is discharged in a mist form from a spray gun for application through a high pressure hose (not shown).

When the first cylinder 17 reaches the contracted end and the second cylinder 18 reaches the expanded end, the first cylinder 17 is driven to expand and the second cylinder 18 is contracted to drive. As a result, the pumps 13 to 16 perform the reverse operation to the above, and the main agent and the curing agent in the first tank 11 and the second tank 12 are continuously discharged to the first pipe line 41 and the second pipe line 42, respectively. The lining resin material is continuously discharged from the spray gun.

During this period, the main agent in the first tank 11 flows from the outflow port 114 to the suction port 131 of the first pump 13 immediately below it, and from the outflow port 115 to the suction port 141 of the second pump 14 immediately below it. To the respective pump chambers and smoothly drawn into the respective pump chambers.

Further, the hardening agent in the second tank 12 flows from the outflow port 124 to the suction ports 151, 161 of the third pump 15 or the fourth pump 16 therebelow, respectively, for the shortest distance, and the respective pumps. It is smoothly inhaled into the room.

As described above, in the pressure feeding device 1, the outlets 114 and 115 of the first tank 11 and the first pump 13 are provided.
Since the conduit between the suction port 131 and the suction port 131, 141 of the second pump 14 is linear and has the shortest distance, the conduit resistance is extremely small, and the highly viscous fluid flows straight from top to bottom. The fluidity of highly viscous fluid is extremely good.
Therefore, the highly viscous fluid flows smoothly and is continuously pumped without interruption.

Further, since the four pumps 13 to 16 are arranged in parallel with each other and are horizontally arranged below the two tanks 11 and 12, the height of the pressure feeding device 1 does not increase and the space is increased. It is effectively used and the whole device can be compactly integrated.

There are two outlets 114, 1 in the first tank 11.
Since 15 is provided, the first pump 13 arranged below the first pump 13
Also, the pipes can be vertically connected to the suction ports 131 and 141 of the second pump 14 in the shortest distance.

In the above embodiment, the plunger 13
Although the diameters of a and 14a and the diameters of the plungers 15a and 16a are set to 38 mm and 25 mm, these can be set according to the mixing ratio of the two liquids. Pump 13-16
Although the plunger pump is used as the above, a piston pump having a piston that closely slides on the inner peripheral surface of the tube may be used. Check valves 31-38 in pumps 13-16
You may use the thing which each built in. Pipes 113 and 123 are provided in both tanks 11 and 12, and warm water is circulated in these pipes 113 and 123 to heat the stored items. For example, the tank 1 in which the main material having high viscosity is stored.
Only one pipe 113 may be provided, or hot water may be circulated only in the pipe 113. Other, tanks 11, 1
2. The structures, shapes, types, numbers, and arrangements of the pumps 13 to 16 and the cylinders 17 and 18, the piping materials connecting these, the piping paths, and the like can be appropriately changed in accordance with the gist of the present invention.

[0043]

According to the inventions of claims 1 to 3,
A high-viscosity fluid smoothly flows, is sucked into the piston pump, and the fluid to be pressure-fed can be provided in a compact form without interruption.

According to the third aspect of the invention, since the pipe line between the outlet of the first tank and the inlets of the first piston pump and the second piston pump is linear and has the shortest distance,
Since the conduit resistance is extremely small and the highly viscous fluid flows straight, its fluidity is extremely good.

[Brief description of drawings]

FIG. 1 is a front view schematically showing a pressure feeding device according to the present invention.

FIG. 2 is a plan view showing the outline of a pressure feeding device according to the present invention.

FIG. 3 is a front view showing a part of FIG. 1 in an enlarged manner.

FIG. 4 is a plan view showing a part of FIG. 2 in an enlarged manner.

FIG. 5 is a block diagram showing a part of a fluid circuit of the pumping device.

FIG. 6 is a diagram showing a conventional high-viscosity fluid pressure-feeding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pumping device 11 1st tank 12 2nd tank 13 1st pump (1st piston pump) 14 2nd pump (2nd piston pump) 15 3rd pump (3rd piston pump) 16 4th pump (4th piston pump) ) 17 1st cylinder 18 2nd cylinder

Claims (3)

[Claims] 1. A first tank and a second tank for containing a fluid, a first piston pump and a second piston pump for pumping the fluid in the first tank, which have mutually equal effective diameters, A third piston pump and a fourth piston pump having the same effective diameter for pumping the fluid in the second tank; a first cylinder that reciprocally drives the first piston pump and the third piston pump; A second cylinder that reciprocally drives the second piston pump and the fourth piston pump in opposite directions to the first cylinder, the first piston pump, the second piston pump, and The third piston pump and the fourth piston pump are horizontal, parallel to each other, and rods for driving are directed in the same direction. 1st tank and the said 2nd tank are arrange | positioned in a lower position, and each suction port of said 1st piston pump and said 2nd piston pump is connected to the outflow port provided in the bottom part of said 1st tank, Each suction port of the three-piston pump and the fourth piston pump is connected to an outlet port provided at the bottom of the second tank, and each discharge port of the first piston pump and the second piston pump is connected to each other. And is connected to a first pipe line for pressure feed, and the respective discharge ports of the third piston pump and the fourth piston pump are connected to each other and are connected to a second pipe line for pressure feed. And a fluid pumping device. 2. The first cylinder is arranged to face the first piston pump and the third piston pump, and the second cylinder faces the second piston pump and the fourth piston pump. The fluid pressure-feeding device according to claim 1, which is arranged. 3. The bottom portion of the first tank is provided with two outflow ports, and the intake ports of the first piston pump and the second piston pump are located directly below the two outflow ports, respectively. The respective inlets and the respective outlets are connected by a straight pipe line via a check valve that becomes a free flow in the direction from the respective outlets to the respective inlets. Fluid pumping device.