JP2000320451A - Pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pump capable of continuously supplying a large driving force and of being miniaturized and reduced in weight. SOLUTION: Air compressed by a compressor and regulated in pressure by a filter regulator is sent to a first operating chamber 26 within a cylinder 12 by a selector valve 17. When a piston 25 is pushed to the second pump tube 14 side, water within a second retention chamber 30 passes a non-return valve 42 to be discharged into a manifold 19. At the same time, water is sucked from a tank 18 to a first retention chamber 29. By switching the selector valve 17, the air is sent to a second operating chamber 27. When the piston 25 is pushed to a first pump tube 13 side, the water retaining inside the first retention chamber 29 passes a non-return valve 40, a pressure fluid pipe 39, and a nonreturn valve 41 to be discharged into the manifold 19. This operation is repeated by switching the selector valve 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump, and more particularly, to a pump for opening a door when rescue a passenger from a vehicle that has been severely damaged by a traffic accident.

[0002]

2. Description of the Related Art Conventionally, to rescue an occupant from a vehicle that has been severely damaged by a traffic accident, a tool is forcibly inserted between the damaged door and the entrance of the vehicle, and the tool is used to pry open or compress the door. It was necessary to arrange a jack between the floor and the ceiling of the cabin, and to widen the gap between the floor and the ceiling by the jack. Since the operation of such tools and jacks requires a relatively large driving force, a hydraulic pump has been used as the driving source.

[0003]

However, since the hydraulic pump is a heavy and large device, it requires human labor to transport it, and is extremely unsuitable for use at an accident site where immediate action is required. In general, when oil is supplied to a tool or a jack by a hydraulic pump, pulsation occurs, so that a large driving force cannot be continuously supplied to the tool or the jack.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a pump capable of continuously supplying a large driving force and achieving a reduction in size and weight. Is to do.

[0005]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, a cylinder, a piston reciprocally housed inside the cylinder, and the piston are connected to the cylinder. Is divided into two, thereby dividing the first and second working chambers, and alternately supplying gas to the first and second working chambers. A gas supply source for reciprocating movement, a tank containing liquid, and first and second stop chambers provided adjacent to the first and second working chambers and connected to the tank, respectively. And the liquid in the tank is connected to the first and second stop chambers and the first and second
A discharge port for discharging to the outside via the stop chamber, and a second port that protrudes in the opposite direction from the piston and that can reciprocate in the first and second stop chambers with the reciprocation of the piston. First and second rods, and by alternately supplying gas from the gas supply source to the first and second working chambers, the first and second rods are reciprocated together with the piston, and the In accordance with the reciprocation of the first and second rods, the liquid is sucked from the tank into the first stop chamber, and at the same time, the liquid is discharged from the discharge port through the second stop chamber; At the same time as the liquid is sucked into the second stop chamber, and the liquid is discharged from the outlet through the first stop chamber.

Therefore, according to the first aspect of the present invention,
Due to the reciprocation of the piston, the liquid can be continuously discharged without pulsation, and a large driving force can be continuously supplied.

According to a second aspect of the present invention, in the pump according to the first aspect, between each of the working chambers and the corresponding stop chamber and between each of the stop chambers and the corresponding rod. Each is provided with a seal. Therefore, it is possible to prevent the gas from leaking into each of the stationary chambers and the liquid from leaking into each of the working chambers.

According to a third aspect of the present invention, in the pump according to the first aspect, the gas is air, and the liquid is water. Therefore, the pump can be operated by easily available gas, and can be used in a fire spot because water is used.

According to a fourth aspect of the present invention, in the pump according to any one of the first to third aspects, the gas supply source is a compressor. Therefore, gas can be more efficiently supplied to the compressor.

According to a fifth aspect of the present invention, in the pump according to any one of the first to fourth aspects, the cylinder, the piston and the rod are made of aluminum. Therefore, the size and weight of the pump can be reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a pump embodying the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, the pump 11
Is a cylinder 12, a pair of pump tubes 13, 14,
It comprises a compressor 15, a filter regulator 16, a switching valve 17, a tank 18, a manifold 19, and a pair of outlets 20, 20, and these members are:
It is arranged on a base 21.

The cylinder 12 is made of aluminum and is formed in a cylindrical shape. The openings at both ends are closed by flanges 22. The cylinder 12 has four tie bolts 23
Each tie bolt 23 is sandwiched between both flanges 22 by nuts 24 for tightening both ends of the tie bolt 23. Cylinder 1
Inside 2, a piston 25 made of aluminum that can reciprocate along the longitudinal direction of the cylinder 12 is accommodated. The piston 25 has a moving end on the right side shown in FIG.
Can be reciprocated with the left moving end shown in FIG. The piston 25 divides the inside of the cylinder 12 into two to partition a first working chamber 26 and a second working chamber 27. Air, which is a gas, can flow into both working chambers 26 and 27, and the volume of both working chambers 26 and 27 increases and decreases as the piston 25 reciprocates. As shown in FIG. 4, a seal 28 is provided on the outer periphery of the piston 25 to reliably shut off the space between the first working chamber 26 and the second working chamber 27 during reciprocation of the piston 25 and at rest. The piston 25 has a disk shape, and the seal 28 has a ring shape.

At both ends of the cylinder 12, flanges 22 are provided.
The first and second pump tubes 13 and 14 are connected to each other via the. Both pump tubes 13 and 14 are formed in a cylindrical shape by aluminum, and one end is opened and the other end is closed. Then, they are connected to the corresponding flanges 22 through the openings. The two pump tubes 13 and 14 communicate with the first and second working chambers 26 and 27, respectively, via holes 31 provided in the corresponding flanges 22.

At the center of the piston 25, first and second rods 32 and 33 made of aluminum are provided so as to project from the piston 25 in the opposite direction. The first and second rods 32, 33 enter the first and second pump tubes 13, 14, respectively. Between the distal ends of the first and second rods 32, 33 and the inner walls of the first and second pump tubes 13, 14, liquid is contained inside the first and second pump tubes 13, 14. First and second holding chambers 29 and 30 for holding water are formed, respectively. The two rods 32 and 33 move the first and second pump tubes 1 along with the reciprocation of the piston 25.
Reciprocation is possible in each of 3 and 14. The volumes of the two holding chambers 29 and 30 increase and decrease as the rods 32 and 33 reciprocate, respectively. When the piston 25 is located at the right moving end shown in FIG. 4, the tip of the left rod 32 on the opposite side to the moving end is in the corresponding stop chamber 29
Located within. On the other hand, when the piston 25 is located at the left moving end shown in FIG. 5, the distal end of the right rod 33 opposite to the moving end is located in the corresponding stop chamber 30. As described above, the lengths of the rods 32 and 33 are set such that when the piston 25 is at one of the moving ends, the tip of the rod located on the opposite side to the moving end is located in the corresponding stop chamber. Is set. A seal 34 is provided on the inner periphery of the hole 31 of each flange 22, and each of the working chambers 26 and 27 and the corresponding stop chamber 29,
30 and the rods 32 and 33 are partitioned and blocked.

The tank 18 contains water, and the tank 1
An opening (not shown) for replenishing water and a stopper 35 for always closing the opening are provided at the upper part of 8. A pair of fluid pipes 36 are connected to a lower portion of the tank 18, and each fluid pipe 36 is connected to the first and second pump tubes 13 and 14, respectively. Therefore,
The water flows out of the tank 18 and flows into the first and second holding chambers 29 and 30 in the first and second pump tubes 13 and 14 through the respective fluid pipes 36.
Each fluid pipe 36 and first and second pump tubes 1
Non-return valves 37 and 38 are provided between the pump tubes 13 and 14, respectively.
8 is prevented from flowing back.

As shown in FIGS. 4 and 5, the distal end of the first pump tube 13 is connected to a pressure fluid pipe 3 made of aluminum.
9 is connected to the manifold 19 through which water in the first stop chamber 29 flows into the manifold 19 through the pressure fluid pipe 39. Check valves 40 and 41 are provided between the first pump tube 13 and the pressure fluid pipe 39 and between the pressure fluid pipe 39 and the manifold 19, respectively. The check valve 40 prevents water from flowing back from the pressure fluid pipe 39 toward the first pump tube 13, and the check valve 41 controls the manifold 19.
To prevent the water from flowing back toward the pressure fluid pipe 39.

On the other hand, the tip of the second pump tube 14 is connected to the manifold 19 via a check valve 42 so that the water in the second stop chamber 30 flows into the manifold 19. . The check valve 42 is connected to the manifold 19.
To prevent the water from flowing backwards toward the second pump tube 14.

The manifold 19 has a pair of outlets 20,
20 are provided, and the first and second stop rooms 29, 3 are provided.
Water flowing into the manifold 19 from 0 is discharged from the outlet 20 to the outside of the pump 11. Various tools operated by high-pressure water supplied from the pump 11 can be connected to the two outlets 20 by a coupler 43. Various tools include, for example, an opener 51 and a jack 52 shown in FIG. The opener 51 has a pair of operating pieces, and both operating pieces are always kept in a closed state by the urging force of a spring (not shown), and both operating pieces are opened when high-pressure water is supplied. Therefore, if the opener 51 in the closed state is forcibly inserted between the vehicle damaged by the traffic accident and the door of the vehicle and high-pressure water is supplied in this state, the door can be opened. In addition, if the jack 52 shown in FIG. 1 is arranged between the compressed floor and the ceiling of the cabin and high-pressure water is supplied to the jack 52, the distance between the floor and the ceiling can be increased. it can. If a tool is installed, both outlets 20,
20 can discharge water to the outside, and when no tool is attached, water is discharged from the outlet 2 by the coupler 43.
It is configured so that it does not flow out from 0 and 20 to the outside.
The manifold 19 has a pressure meter 44,
The water pressure in the manifold 19 is measured and displayed.

The compressor 15 generates compressed air by using a power source (not shown), and constitutes a gas supply source for supplying the compressed air into the cylinder 12. The compressor 15 is connected to a filter regulator 16 by an air hose 45. The filter regulator 16 adjusts the pressure of the compressed air discharged from the compressor 15 to a predetermined value, and discharges the air after the pressure adjustment. The filter regulator 16 is connected to the switching valve 17 by an air hose 46.
The switching valve 17 alternately switches and discharges the air discharged from the filter regulator 16 in two directions, and the switching operation is performed by an electromagnetic valve (not shown). The switching valve 17 is capable of adjusting a switching interval, and can arbitrarily set a switching time. In addition, the switching valve 17 includes first and second switching hoses 47 and 48.
Are connected to the corresponding flanges 22, respectively. A connection fitting 49 is provided between each of the switching hoses 47 and 48 and the flange 22. 4 and 5
As shown in FIG.
Through the first and second working chambers 26 in the cylinder 12,
A communication hole 50 is provided for allowing the switching hose 27 to communicate with the switching hoses 47 and 48. Therefore, based on the operation of the switching valve 17, air is supplied to the first and second switching hoses 47, 48.
Are supplied to the first and second working chambers 26 and 27 alternately.

Next, the flow of air and water in the pump 11 of the present embodiment will be described individually with reference to FIGS. First, as for the flow of air, as shown in FIG. 3, the air is compressed by a compressor 15 and sent to a filter regulator 16. The compressed air is adjusted to a predetermined pressure by a filter regulator 16 and sent to a switching valve 17. The air is alternately distributed to the first and second working chambers 26 and 27 at predetermined intervals by the switching valve 17. The air sent to the first working chamber 26, due to the pressure, causes the cylinder 12 to move as shown in FIG.
To the right toward the second pump tube 14. As a result, the second rod 33 reduces the volume of the second holding room 30. On the other hand, the air sent to the second working chamber 27 is compressed by the cylinder 1 as shown in FIG.
2 is pushed to the left toward the first pump tube 13. As a result, the first rod 32 reduces the volume of the first holding chamber 29.

On the other hand, water is supplied from the tank 18 to the check valve 37,
After passing through 38, they flow into the first and second stop chambers 29 and 30 in both pump tubes 13 and 14. Check valve 3
7, 38 prevent water from flowing back from the pump tubes 13, 14 towards the tank 18. The water in the first stop chamber 29 passes through the check valves 40 and 41 and the manifold 1
Flow out to 9. On the other hand, the water in the second stop chamber 30 flows out to the manifold 19 through the check valve 42. Further, water is sent from the manifold 19 through the outlets 20, 20 to the opener 51 or the jack 52.

Next, the operation of the pump 11 of the present embodiment will be described. First, the compressor 15 is started, whereby the air is compressed. The compressed air is sent to the switching valve 17 after being adjusted to a predetermined pressure by the filter regulator 16. Then, based on the operation of the switching valve 17, air is first sent to the first working chamber 26.
Then, as shown in FIG. 4, the piston 25 is pushed rightward toward the second pump tube 14. In this state, while the volume of the first working chamber 26 is maximized,
The volume of the second working chamber 27 is minimized. In addition, since almost the entire length of the second rod 33 enters the second pump tube 14, the volume of the second stop chamber 30 is minimized. Therefore, the water retained in the second retaining chamber 30 is pressurized by the second rod 33 and discharged to the manifold 19 through the check valve 42. At the same time, the first rod 32
Is mostly drawn into the first working chamber 26, so that the first
The maximum capacity of the stop chamber 29 is maximized, and water is sucked from the tank 18 into the first stop chamber 29.

Next, based on the operation of the switching valve 17, air is sent to the second working chamber 27. Then, the piston 25 is pushed leftward toward the first pump tube 13 as shown in FIG. In this state, the capacity of the second working chamber 27 is maximized, while the capacity of the first working chamber 26 is minimized. Further, since the substantially entire length of the first rod 32 enters the first pump tube 13, the volume of the first stop chamber 29 is minimized. Therefore, the first stop room 29
The water retained in the inside is pressurized by the first rod 32, and the check valve 40, the pressure fluid pipe 39, and the check valve 4
It is discharged to the manifold 19 through 1. At the same time, most of the second rod 33 is drawn into the second working chamber 27, so that the volume of the second holding chamber 30 is maximized, and water is sucked from the tank 18 into the second holding chamber 30. .

As described above, based on the operation of the switching valve 17, the compressed air is alternately supplied to the first and second working chambers 26 and 27, and the piston 25 moves to the right moving end shown in FIG. 5 is reciprocated with the left moving end. When the piston 25 moves forward, that is, when the piston 25 moves to the right, water is sucked from the tank 18 into the first stop chamber 29, and at the same time, water is discharged from the discharge port 20 via the second stop chamber 30. Is discharged. Further, when the piston 25 moves backward, that is, when the piston 25 moves to the left, water is sucked from the tank 18 into the second stop chamber 30 and, at the same time, the discharge port 2 passes through the first stop chamber 29.
Water is drained from zero. Therefore, the pump 1 of the present embodiment
In 1, continuous inhalation and evacuation of water is possible.

According to the pump 11 of the above embodiment, the following effects can be obtained. (1) In the above embodiment, water can be sent to the discharge port 20 from both the first and second stop chambers 29 and 30 during one reciprocation of the piston 25. Therefore, unlike a normal piston, water can be continuously discharged without pulsation.

(2) The seal 28 can prevent air from leaking from one working chamber to the other working chamber, and the seal 34 allows air to leak to each of the stagnant chambers 29 and 30 and water to be used for each operating chamber. Leakage into the chambers 26 and 27 can be suppressed.

(3) Since air is used as a gas and water is used as a liquid, the pump 1 can be easily obtained by using a readily available gas.
1 can be activated. In addition, since water is used, the pump 11 can be used even at a fire site.

(4) Since the gas supply source is the compressor 15, gas can be supplied efficiently, and the air pressure can be adjusted to a predetermined value by the filter regulator 16, so that a stable pressure can be supplied.

(5) Since the cylinder 12, the piston 25, the rods 32, 33 and the pressure fluid pipe 39 are made of aluminum, the size and weight of the pump can be reduced. In particular, since the miniaturization and weight reduction of the pump are realized, the worker can carry alone at the site of a fire or a traffic accident, and rescue work or the like can be performed quickly.

(6) Check valves 37, 38, 40, 41, 4
Because of the provision of 2, the flow of water can be regulated in a certain direction, and backflow can be prevented. The above embodiment may be modified as follows.

In the above embodiment, the switching valve 17 is used to alternately send air to the first and second working chambers 26 and 27. However, two compressors 15 and two filter regulators 16 are provided, and both are operated. Room 26, 2
The compressed air may be sent to 7. In this case, the timing at which the two compressors 15 send out air may be set by a timer or the like.

The gas is not limited to air, but may be nitrogen or a gas having another composition. Further, the fluid is not limited to water but may be oil. In this case, use at a fire site is, of course, prohibited.

The configuration may be such that two or more cylinders 12 are provided. By providing a plurality of cylinders 12, a larger pressure can be generated. -One discharge port 20 may be provided, or three or more discharge ports may be provided. When the number of outlets is one, the size of the manifold 19 can be reduced. On the other hand, when the number of outlets is three or more, a plurality of tools can be connected at a time to perform various operations.

Next, technical ideas other than the invention described in the claims which can be grasped from the above embodiment and other examples will be described below together with their effects. (1) In the pump according to any one of claims 1 to 5, at least one of between the tank and the first and second stop chambers and between the first and second stop chambers and the discharge port. On the other hand, a pump provided with liquid backflow prevention means for restricting the flow of liquid in a certain direction. In this case, the flow of the liquid is regulated in a certain direction, and the pressure generated by the pump can be used efficiently. Note that the liquid backflow prevention means includes a check valve.

[0036]

As described above, according to the first aspect of the present invention, the reciprocating motion of the piston continuously discharges the liquid without pulsation and continuously supplies a large driving force. can do.

According to the second aspect of the present invention, it is possible to prevent gas from leaking into each of the stationary chambers and liquid from leaking into each of the working chambers. According to the third aspect of the present invention, the pump can be operated by a medium that is easily available, and can be used at a fire spot because water is used.

According to the fourth aspect of the present invention, gas can be more efficiently supplied to the compressor. According to the invention described in claim 5, the size and weight of the pump can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a pump according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a schematic diagram showing movement of air and water in a pump.

FIG. 4 is a schematic diagram showing an operation state of a pump.

FIG. 5 is a schematic diagram showing an operation state of a pump.

[Explanation of symbols]

12 ... cylinder, 15 ... compressor as gas supply means, 18 ... tank, 20 ... outlet, 25 ... piston,
26: first working chamber, 27: second working chamber, 28: seal, 29: first stop room, 30: second stop room, 32 ...
First rod, 33 ... second rod, 34 ... seal.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H071 AA01 AA03 AA06 BB01 BB04 BB05 CC28 CC33 CC34 CC36 CC47 DD01 DD06 DD11 DD14 DD31 DD51 DD71 DD72 DD74 DD83 DD89 EE01 EE02 EE03 3H075 AA06 BB03 BB14 CC25 DB43 DB45

Claims (5)

[Claims] 1. A cylinder, a piston housed reciprocally within the cylinder, and the piston divides the interior of the cylinder into two to partition first and second working chambers. A gas supply source for alternately supplying gas to the first and second working chambers, and reciprocating the piston with the supply; a tank containing a liquid; A first and a second stop chamber provided adjacent to each of the second working chambers and connected to the tank; and A discharge port for discharging to the outside via the first and second stop chambers; and a protrusion protruding in the opposite direction from the piston, and reciprocating in the first and second stop chambers with the reciprocation of the piston. Movable first and second rods By alternately supplying gas from the gas supply source to the first and second working chambers, the first and second rods are reciprocated with the piston, and the first and second rods are reciprocated. In accordance with the movement, the liquid is sucked from the tank into the first stop chamber, and at the same time, the liquid is discharged from the outlet through the second stop chamber, and the liquid is discharged from the tank to the second stop chamber. A pump wherein the liquid is discharged from the outlet through the first stop chamber at the same time as the liquid is sucked. 2. The seal according to claim 1, wherein a seal is provided between each of the working chambers and the corresponding stop chamber, and between each of the stop chambers and the corresponding rod. pump. 3. The pump according to claim 1, wherein the gas is air, and the liquid is water. 4. The pump according to claim 1, wherein the gas supply source is a compressor. 5. The pump according to claim 1, wherein said cylinder, piston and rod are made of aluminum.