WO2016011868A1

WO2016011868A1 - High-pressure water pump

Info

Publication number: WO2016011868A1
Application number: PCT/CN2015/082161
Authority: WO
Inventors: 刘贵文; 杨明军; 黄锦全
Original assignee: 台州市大江实业有限公司
Priority date: 2014-07-24
Filing date: 2015-06-24
Publication date: 2016-01-28
Also published as: CN105275765B; CN105275765A

Abstract

Disclosed is a high-pressure water pump, comprising an upper pump body (1), a lower pump body (2), a water outlet valve (3), a water inlet valve (4), a plunger piston (41), a guide sleeve (42), a water inlet channel (52), a water outlet channel (53) and a pump-out valve (7). The upper pump body (1) is connected to the lower pump body (2) through a connecting bolt (51), and a sealing ring (44) is provided between the upper pump body (1) and the lower pump body (2); the plunger piston (41) is sheathed in the upper pump body (1), an upper end of the plunger piston (41) is in threaded connection with a knocking cap (5), and an adjustment cap (6) is provided at an upper end of the upper pump body (1); a plunger piston reset spring (40) is provided between the knocking cap (5) and the adjustment cap (6); a sealing element (46) is provided between the upper pump body (1) and the plunger piston (41); a working cavity (50) is formed between the plunger piston (41) and the upper pump body (1) and/or the lower pump body (2); the water outlet valve (3), the water inlet valve (4) and the pump-out valve (7) are provided on the lower pump body (2); the water inlet valve (4) is connected to the working cavity (50) through the water inlet channel (52), and the water inlet valve (4) is a one-way valve; the water outlet valve (3) is connected to the working cavity (50) through the water outlet channel (53); and the pump-out valve (7) is in communication with the working cavity (50) by a threaded connection with the lower pump body (2). The present water pump can ensure that the quantity of water pumped is equal every time and ensure that nailing pressure is the same every time.

Description

High pressure water pump

Technical field

The invention belongs to the field of mechanical devices, and in particular relates to a high pressure water pump.

Background technique

At present, the power source of the nail gun is mostly compressed air. The compressed air must have an air inlet pipe connected to the nail gun body. It is inconvenient for the user to pull the air pipe, and the exhaust noise is generated when the compressed gas works. Larger, users often need to wear protective earplugs. Moreover, the compressed air must be provided by an air compressor, which is heavy and bulky, and is inconvenient for the decorator to carry. And air compressors also cost.

technical problem

In the prior art, there are also devices that use high-pressure water pumps to generate power, but most of them have a short service life, require frequent replacement of components, and there is a problem that the nailing force varies greatly each time, which greatly reduces production efficiency.

Technical solution

In view of the deficiencies in the prior art described above, the present invention is directed to providing a high pressure water pump that ensures equal amount of water per shot. Moreover, the use of the present invention can ensure that the nailing force is the same every time.

In order to achieve the above object, the present invention adopts the following technical solutions:

A high pressure water pump includes an upper pump body, a lower pump body, a water outlet valve, an inlet valve, a plunger, a guide sleeve, a water inlet, a water outlet, and an evacuation valve.

The upper pump body and the lower pump body are connected by a connecting bolt, and a sealing ring is arranged between the upper pump body and the lower pump body, and the sealing ring functions as a seal to prevent leakage.

The plunger is sleeved in the upper pump body, and the upper end of the plunger is screwed with a knocking cap, and the upper end of the upper pump body is provided with an adjusting cap.

A plunger return spring is disposed between the knocking cap and the adjusting cap, and the plunger return spring can pull the plunger back to the starting position.

A bushing and a sealing member are disposed between the upper pump body and the plunger, and the sealing member functions as a sealing member. The bushing is made of a wear-resistant and water-resistant material, and is located above the sealing member, and the bushing can improve the plunger and the sealing member. Axiality to improve the seal of the seal while reducing seal wear.

A guiding sleeve is arranged between the adjusting cap and the plunger, and the guiding sleeve plays a guiding role when the plunger moves up and down, and the guiding sleeve is made of wear-resistant material.

A pretensioning spring is disposed between the adjusting cap and the upper pump body, and the preloading spring can enhance the adjusting cap feel.

A working chamber is formed between the plunger and the upper pump body and/or the lower pump body.

The lower pump body is provided with a water outlet valve, an inlet valve and an evacuation valve.

The inlet valve is connected to the working chamber through the water inlet, and the inlet valve is a one-way valve, and the water can only enter and exit. The inlet valve is connected to the water tank through a water pipe to form a flow path. The inlet valve includes a valve seat, a spool, and a return spring. The valve seat and the valve core have a sealing surface. Under the pre-pressure of the return spring, the sealing surface of the valve seat and the valve core is closely attached. When the working chamber has a vacuum degree, the valve core overcomes the action of the return spring under the action of atmospheric pressure. When the force is turned on, the water in the inlet pipe is sucked into the working chamber of the water pump. When the working chamber has a high pressure, the valve seat and the valve core are tightly sealed and sealed, and the water cannot leak, and acts as a check valve.

The water outlet valve is connected to the working chamber through a water outlet, and the water outlet valve includes a water inlet, a water outlet, a valve seat, a valve core, a limiting rod, a return spring, a valve body, a lock nut and an outlet pipe. One end of the valve body is connected with the valve seat, the other end is connected with the water outlet pipe, the valve seat is provided with a valve core, one end of the valve core is connected with the water inlet, the other end is connected with the limit rod, the limit rod is located in the valve body, and the limit rod is limited. The function is to prevent the valve core from coming out of the valve seat. A lock nut is used to secure the outlet pipe.

The valve seat and the valve core are matched by a coupling piece, and the matching clearance is 0.001 to 0.003 mm, and the valve core has a missing table. Only when the valve core is missing under the hydraulic pressure to expose the valve seat, that is, when the stroke is greater than m, the high pressure water is In order to flow out, m is the replacement stroke.

The evacuation valve is configured to discharge air in the working chamber, and the evacuation valve is connected to the working chamber by screwing the lower pump body. The evacuation valve includes a valve body and a spool. The valve body is provided with a valve core, and the valve core is provided with a compression spring. The valve body and the valve core have a sealing cone surface. As long as the external force overcomes the compression spring to open the valve core, the air in the water pump can be extracted by using the vacuum.

The seal may be an O-ring or other form of seal.

The evacuation valve can also be integrated with the external air suction device and mounted on the gun body, which is convenient to use.

The missing of the spool can take many forms, such as a cross recess or a spiral slot.

Beneficial effect

The beneficial effects of the invention are: long service life and high production efficiency; It can guarantee that the amount of water played every time is equal; it can guarantee the same strength every time.

DRAWINGS

Figure 1 is a schematic structural view of the present invention;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1;

Figure 3 is a cross-sectional view taken along line B-B of Figure 2;

Figure 4 is a schematic structural view of the inlet valve of the present invention;

Figure 5 is a schematic structural view of the outlet valve of the present invention;

Figure 6 is a view showing a state in which the valve core is not exposed and the valve seat is not exposed;

Figure 7 is a state diagram of the valve core exposed by the water pressure to expose the valve seat;

Figure 8 is a cross-sectional view taken along line C-C of Figure 7;

LIST OF REFERENCE NUMERALS: 1-pump body, 2-lower pump body, 3-outlet valve, 4-inlet valve, 40-plunger return spring, 41-plunger, 42-guide sleeve, 43-preload spring, 44 Sealing ring, 45- bushing, 46-seal, 5-knocking cap, 50-working chamber, 51-connecting bolt, 52-inlet, 53-outlet, 6-adjustment cap, 60-inlet, 61 -Valve seat, 62 spool, 63 limit lever, 64 return spring, 65 valve body, 66 lock nut, 67-outlet, 68 outlet pipe, 69-lack, 7-vacuum valve, 70-valve body, 71-valve, 72-press spring, 80-valve, 81-valve, 82-return spring.

Embodiments of the invention

For ease of understanding, the technical solutions of the present invention are further described in detail below by way of embodiments with reference to the accompanying drawings:

As shown in Figure 1-8, a high pressure water pump includes an upper pump body 1, a lower pump body 2,

The water outlet valve 3, the water inlet valve 4, the plunger 41, the guide sleeve 42, the bushing 45, the seal 46, the water inlet 52 and the water outlet 53 and the evacuation valve 7.

The upper pump body 1 and the lower pump body 2 are connected by a connecting bolt 51, and a sealing ring 44 is disposed between the upper pump body 1 and the lower pump body 2, and the sealing ring 44 functions as a seal to prevent leakage.

The plunger 41 is sleeved in the upper pump body 1. The upper end of the plunger 41 is screwed with a knocking cap 5, and the upper end of the upper pump body 1 is provided with an adjusting cap 6. The working displacement of the plunger 41=working stroke×column The cross-sectional area of the plug can be adjusted by the adjustment cap 6. When the stroke is large, the water output is also large, and the generated explosion thrust is also large, thereby controlling the nailing force of the gun.

A plunger return spring 40 is provided between the knocking cap 5 and the adjustment cap 6, and the plunger return spring 40 can pull the plunger 41 back to the starting position.

A bushing 45 and a sealing member 46 are provided between the upper pump body 1 and the plunger 41. The sealing member 46 serves as a sealing member and may be an O-ring or other form of sealing ring and material. The bushing 45 is made of a wear-resistant and water-resistant material, which is located above the sealing member 46. The bushing 45 acts to increase the coaxiality of the plunger 41 and the sealing member 46 to improve the sealing effect of the sealing member 46 and also to reduce the sealing member 46. Wear and tear.

A guide sleeve 42 is provided between the adjustment cap 6 and the plunger 41. The guide sleeve 42 serves as a guide when the plunger 41 moves up and down, and the sleeve 42 is made of a wear-resistant material.

A working chamber 50 is formed between the plunger 41 and the upper pump body 1 and/or the lower pump body 2.

A pretension spring 43 is provided between the adjustment cap 6 and the upper pump body 1, and the pretension spring 43 can enhance the feel of the adjustment cap 6.

The lower pump body 2 is provided with an outlet valve 3, an inlet valve 4 and an evacuation valve 7.

The inlet valve 4 is connected to the working chamber 50 through the water inlet 52, and the inlet valve 4 is a one-way valve, and the water can only enter and exit. The inlet valve 4 is connected to the water tank through a water pipe to form a flow path. The inlet valve 4 includes a valve seat 80, a spool 81 and a return spring 82. The valve seat 80 has a sealing surface with the valve core 81. Under the pre-pressure of the return spring 82, the sealing surface of the valve seat 80 and the valve core 81 is in close contact. When the working chamber 50 has a vacuum degree, the valve core 81 is at atmospheric pressure. Under the action, the force of the return spring 82 is opened, and the water of the inlet pipe is sucked into the working chamber 50 of the water pump. When the working chamber 50 has a high pressure, the valve seat 80 and the valve core 81 are tightly sealed and sealed, and the water cannot leak. The role of the valve.

The water outlet valve 3 is connected to the working chamber 50 through the water outlet 53. The water outlet valve 3 includes a water inlet 60, a water outlet 67, a valve seat 61, a valve core 62, a limiting rod 63, a return spring 64, a valve body 65, a lock nut 66, and Outlet pipe 68. The valve body 65 is connected to the valve seat 61 at one end, and the outlet pipe 68 is connected to the other end. The valve seat 61 is provided with a valve core 62. One end of the valve core 62 is connected to the water inlet 60, and the other end is connected to the limiting rod 63. The limiting rod 63 is located at the other end. In the valve body 65, the limiting rod 63 acts as a limit to prevent the valve core from coming out of the valve seat. A lock nut 66 is used to secure the outlet pipe 68.

The valve seat 61 and the valve core 62 are matched by a coupling member, the fitting clearance is 0.001 to 0.003 mm, and the valve core 62 has a missing table 69. Only when the valve core 62 is pushed out by the water pressure to expose the valve seat 61, It is said that the high pressure water can flow out when the stroke is greater than m, and m is the displacement stroke. When the water pressure is reduced, the return spring 64 pushes the spool 62 back, and a vacant volume is formed in the inner cavity of the valve body 65. The vacant volume of water must be replenished by the water in the water outlet 67 and the outlet pipe 68. Volume = displacement stroke m × cross-sectional area of the valve core 62, so that a small amount of water left in the pipe of the outlet pipe 68 is not evaporated by the heat transferred from the high temperature portion, resulting in insufficient water injection amount in the next hit. This structure makes the high-pressure water pump equal to the amount of water that is produced each time, and the nailing strength is the same.

The missing table 69 of the spool 62 can take a variety of forms, or a cross-notch or a spiral notch.

When there is air in the working chamber 50 of the water pump, the water pump cannot normally absorb water, so the air must be discharged. The evacuation valve 7 is for discharging air in the working chamber 50, and the evacuation valve 7 includes a valve body 70 and a valve body 71. The valve body 70 is provided with a valve core 71. The valve core 71 is provided with a compression spring 72. The valve body 70 and the valve core 71 have a sealing cone surface. As long as the external force pushes the valve core 71 against the compression spring 72, the vacuum is used. Can extract the air from the pump. The evacuation valve 7 can also be integrally assembled with the external air suction device on the gun body, which is convenient to use. The evacuation valve 7 is connected to the working chamber 50 by a lower pump body 2 that is screwed to the water pump.

In use, when the operator taps the hammer to hit the water pump knocking cap 5, the plunger 41 presses the water of the high pressure chamber 50 to generate high pressure, and the high pressure water enters the steam power generator (system) through the water pump outlet valve 3, the high pressure water pipe and the inlet pipe. The medium explosion produces high temperature and high pressure steam.

The above-mentioned embodiments are merely illustrative and explanatory of the technical solutions of the present invention, and are not to be construed as limiting the present invention. It is obvious that those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the present invention. range. The present invention also includes such modifications and variations as long as they are within the scope of the appended claims and their equivalents.

Claims

1. A high pressure water pump comprising an upper pump body, a lower pump body, a water outlet valve, an inlet valve, a plunger, a guide sleeve, a water inlet, a water outlet, and an evacuation valve;

The upper pump body and the lower pump body are connected by a connecting bolt, and a sealing ring is arranged between the upper pump body and the lower pump body;

The plunger is sleeved in the upper pump body, the upper end of the plunger is screwed with a knocking cap, and the upper end of the upper pump body is provided with an adjusting cap;

a plunger return spring is disposed between the knocking cap and the adjusting cap;

a seal between the upper pump body and the plunger;

Forming a working chamber between the plunger and the upper pump body and/or the lower pump body;

The lower pump body is provided with a water outlet valve, an inlet valve and an evacuation valve;

The inlet valve is connected to the working chamber through the water inlet, and the inlet valve is a one-way valve;

The outlet valve is connected to the working chamber through a water outlet;

The evacuation valve is connected to the working chamber by screwing the lower pump body.

2. The high pressure water pump according to claim 1, wherein the inlet valve comprises a valve seat, a valve core and a return spring, the valve seat having a sealing surface with the valve core, and a valve under the preload of the return spring The sealing surface of the seat and the valve core is in close contact;

The water outlet valve comprises a water inlet, a water outlet, a valve seat, a valve core, a limiting rod, a return spring, a valve body, a lock nut and an outlet pipe, the valve body is connected with a valve seat at one end, and the water outlet pipe is connected at the other end. a valve core is arranged in the seat, one end of the valve core is connected to the water inlet, the other end is connected to the limiting rod, and the limiting rod is located in the valve body; the valve seat and the valve core are matched with a coupling piece, and the matching gap is 0.001 to 0.003 mm. The spool has a missing table;

The evacuation valve comprises a valve body and a valve core, a valve core is arranged in the valve body, a compression spring is arranged on the valve core, and the valve body and the valve core have a sealing cone surface.

3. A high-pressure water pump according to claim 2, wherein a bushing is provided above the seal, the bushing being made of a wear-resistant and water-resistant material.

4. The high-pressure water pump according to claim 3, wherein a guide sleeve is disposed between the adjustment cap and the plunger, and the guide sleeve is made of a wear-resistant material.

The high-pressure water pump according to claim 4, wherein a pretensioning spring is provided between the adjusting cap and the upper pump body.

6. The high pressure water pump of claim 5 wherein said seal is an O-ring.

7. The high-pressure water pump according to claim 6, wherein the missing portion of the valve core is a cross-shaped groove or a spiral notch.