CN210164626U

CN210164626U - Pump head structure of plunger pump

Info

Publication number: CN210164626U
Application number: CN201920903118.3U
Authority: CN
Inventors: 马永雷
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-03-20
Anticipated expiration: 2029-06-14

Abstract

The utility model discloses a plunger pump head structure, including the pump head body, pump head body both sides are provided with feed liquor pipe and drain pipe respectively, be provided with the valve that is used for controlling feed liquor pipe and drain pipe switching between feed liquor pipe, drain pipe and the pump head body, this internal plunger groove that communicates simultaneously with feed liquor pipe, drain pipe that is provided with of pump head, plunger inslot cooperation has the plunger, plunger middle part one side is provided with the intermediate ring, the plunger groove is provided with back the liquid pipe in the position department of intermediate ring, it communicates with plunger groove, feed liquor pipe to return the liquid pipe. The utility model discloses following beneficial effect has: the pump head structure of the plunger pump can prevent liquid leakage and has a good environment-friendly effect.

Description

Pump head structure of plunger pump

Technical Field

The utility model relates to a pump head, in particular to plunger pump head structure.

Background

The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like, and is widely applied to occasions with high pressure, large flow and flow needing regulation, such as hydraulic machines, engineering machinery and ships. The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil.

The plunger reciprocates in the cylinder, and therefore, the amount of movement of the plunger is large, and a large frictional force needs to be borne during operation, and therefore, the plunger requires high hardness, wear resistance, a long service life, high accuracy, and the like.

After a plunger of a general plunger pump reciprocates for a long time, fluid leaks from a position between the plunger and a pump head due to overlarge pressure, aging of a sealing ring or poor sealing, so that the environment pollution is caused in the working process of the plunger pump.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a plunger pump head structure. The pump head structure of the plunger pump can prevent liquid leakage and has a good environment-friendly effect.

The invention aims to be realized by the following technical scheme:

the utility model provides a plunger pump head structure, includes the pump head body, pump head body both sides are provided with feed liquor pipe and drain pipe respectively, be provided with the valve that is used for controlling feed liquor pipe and drain pipe switching between feed liquor pipe, drain pipe and the pump head body, this internal plunger groove that communicates simultaneously with feed liquor pipe, drain pipe that is provided with of pump head, plunger inslot cooperation has the plunger, plunger middle part one side is provided with the intermediate ring, the plunger groove is provided with back the liquid pipe in the position department of intermediate ring, it communicates with plunger groove, feed liquor pipe to return the liquid pipe.

After adopting above-mentioned technical scheme, when the fluid entered into the feed liquor pipe in, the valve of feed liquor pipe department was opened, the feed liquor pipe feed liquor, and at this moment, the drain pipe valve was in the closed condition. The plunger moves from the plunger groove to the direction far away from the liquid inlet pipe, so that vacuum is formed in the pump head body. Under the influence of the vacuum, the fluid moves into the plunger slot. At the moment, the liquid outlet pipe valve is opened, the liquid inlet pipe valve is closed, and the plunger moves along the plunger groove in the reverse direction. The fluid in the plunger groove is pushed out, so that the fluid flows out along the liquid outlet pipe. In the process, if the liquid leakage phenomenon occurs between the plunger and the plunger groove, the leaked fluid flows into the position of the middle ring under the action of gravity, and the fluid at the position of the middle ring can enter the liquid return pipe and re-enter the liquid inlet pipe to finish recovery, so that a better environment-friendly effect is achieved.

The utility model discloses further set up to: and the middle part of the middle ring is provided with a through hole matched with the liquid inlet pipe.

After the technical scheme is adopted, when fluid leaks to enter the position of the middle ring, the through hole is formed in the position of the middle ring, so that the fluid enters the through hole, and the fluid storage effect is achieved. When the middle ring moves to be communicated with the liquid return pipe, the fluid stored in the through hole returns to the liquid inlet pipe along the liquid return pipe.

The utility model discloses further set up to: and a sealing ring is arranged on one side of the middle ring of the plunger.

After adopting above-mentioned technical scheme, the setting up of sealing washer makes the unable plug groove that flows out through the sealing washer of fluid, but can store in drainage to the through-hole, prevents that the plunger from taking place to leak.

The utility model discloses further set up to: and a first pressing cap is arranged on one side of the plunger.

After adopting above-mentioned technical scheme, the effect that compresses tightly cap one makes plunger and plunger groove more agree with for plunger and plunger groove in close contact with.

The utility model discloses further set up to: and a second pressing cap is arranged on one side of the plunger.

After adopting above-mentioned technical scheme, compress tightly the effect of cap two and be so that can be connected between plunger and other parts, play the effect of connecting the bridge.

To sum up, the utility model discloses following beneficial purpose has: the pump head structure of the plunger pump can prevent liquid leakage and has a good environment-friendly effect.

Drawings

Fig. 1 is a schematic structural diagram of the embodiment.

Reference numerals: 1. a pump head body; 2. a liquid inlet pipe; 3. a liquid outlet pipe; 4. a valve; 5. a plunger groove; 6. a plunger; 7. a support ring; 8. an intermediate ring; 9. a liquid return pipe; 10. a seal ring; 11. a first pressing cap; 12. a second compression cap; 13. and a through hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

As shown in figure 1, a plunger pump head structure comprises a pump head body 1, wherein a liquid inlet pipe 2 and a liquid outlet pipe 3 are respectively arranged on two sides of the pump head body 1. A valve 4 for controlling the opening and closing of the liquid inlet pipe 2 and the liquid outlet pipe 3 is arranged between the liquid inlet pipe 2, the liquid outlet pipe 3 and the pump head body 1. A plunger groove 5 communicated with the liquid inlet pipe 2 and the liquid outlet pipe 3 simultaneously is arranged in the pump head body 1, and a plunger 6 is connected in the plunger groove 5 in a sliding manner. The side of the plunger 6 close to the liquid inlet pipe 2 is provided with a support ring 7, which is used for ensuring that the plunger 6 can slide in the plunger groove 5 to play a role of supporting and guiding the plunger 6 to move.

Optimally, one side of the middle part of the plunger 6 is provided with a middle ring 8, the plunger groove 5 is communicated with a liquid return pipe 9, and the liquid return pipe 9 is communicated with the plunger groove 5 and the liquid inlet pipe 2. Wherein, the middle ring 8 is provided with a through hole 13, and the through hole 13 is matched with the pipe orifice of the liquid return pipe 9.

When fluid enters the liquid inlet pipe 2, the valve 4 at the liquid inlet pipe 2 is opened, the liquid inlet pipe 2 feeds liquid, and at the moment, the valve 4 of the liquid outlet pipe 3 is in a closed state. The plunger 6 moves from the plunger groove 5 in a direction away from the liquid inlet pipe 2, so that a vacuum is formed in the pump head body 1. Under the influence of the vacuum, the fluid moves into the plunger slot 5. At this time, the valve 4 of the liquid outlet pipe 3 is opened, the valve 4 of the liquid inlet pipe 2 is closed, and the plunger 6 moves along the plunger groove 5 in the reverse direction. Pushing fluid out of plunger slot 5 causes fluid to flow out of outlet tube 3. In the process, if the liquid leakage phenomenon occurs between the plunger 6 and the plunger groove 5, the leaked fluid flows into the position of the intermediate ring 8 under the action of gravity, and the fluid at the position of the intermediate ring 8 enters the liquid return pipe 9 and then enters the liquid inlet pipe 2 again to finish the recovery, thereby achieving a better environment-friendly effect. When fluid leaks into the position of the intermediate ring 8, the position of the intermediate ring 8 is provided with the through hole 13, so that the fluid enters the through hole 13 and plays a role of storing the fluid. When the middle ring 8 moves to communicate with the liquid return pipe 9, the fluid stored in the through hole 13 will return to the liquid inlet pipe 2 along the liquid return pipe 9.

Preferably, the plunger 6 is provided with a sealing ring 10 on one side of the intermediate ring 8.

Furthermore, a first pressing cap 11 is arranged on one side of the plunger 6, and a second pressing cap 12 is arranged on one side of the first pressing cap 11.

The sealing ring 10 is arranged so that fluid cannot flow out of the plunger groove 5 through the sealing ring 10, but is guided into the through hole 13 to be stored, and the plunger 6 is prevented from leaking.

Claims

1. The utility model provides a plunger pump head structure, includes pump head body (1), pump head body (1) both sides are provided with feed liquor pipe (2) and drain pipe (3) respectively, be provided with between feed liquor pipe (2), drain pipe (3) and pump head body (1) and be used for controlling valve (4) of feed liquor pipe (2) and drain pipe (3) switching, characterized by: be provided with in pump head body (1) plunger groove (5) that communicate simultaneously with feed liquor pipe (2), drain pipe (3), plunger groove (5) fit in has plunger (6), plunger (6) middle part one side is provided with intermediate ring (8), plunger groove (5) are provided with back liquid pipe (9) in the position department of intermediate ring (8), back liquid pipe (9) and plunger groove (5), feed liquor pipe (2) intercommunication.

2. A plunger pump head construction according to claim 1, wherein: the middle part of the middle ring (8) is provided with a through hole (13) which is matched with the liquid inlet pipe (2).

3. A plunger pump head construction according to claim 2, wherein: and a sealing ring (10) is arranged on one side of the middle ring (8) of the plunger (6).

4. A plunger pump head construction according to claim 3, wherein: and a first pressing cap (11) is arranged on one side of the plunger (6).

5. A plunger pump head construction according to claim 4, wherein: and a second pressing cap (12) is arranged on one side of the plunger (6).