CN105179225A - Water outlet cavity structure of high-pressure pump - Google Patents

Abstract

The invention provides a water outlet cavity structure of a high-pressure pump, which comprises: the water outlet valve seat and the pump cover form a water outlet sealing cavity, wherein the water outlet valve seat is used as a base of the water outlet valve and a plug of the water outlet valve, the surface of the water outlet valve seat is provided with a plurality of water outlet valve base devices, one end of the spring is connected with the water outlet valve base devices, the other end of the spring is connected with the water outlet valve, and the water outlet valve is in periodic contact with and disconnected from a water outlet sealing surface of the pump cover under the action of the spring to realize periodic opening/closing of water outlet. Compared with the prior art, the invention has the advantages of greatly reducing the product cost, improving the production and installation efficiency and being easy to disassemble and maintain by adopting a simple structure.

Description

A water outlet chamber structure of a high-pressure pump

technical field

The invention relates to a piston pump used in a high-pressure cleaning machine, in particular to a water outlet cavity structure of the piston pump used in a high-pressure cleaning machine.

Background technique

The piston pump used for high-pressure cleaning machines has at least one pump chamber. One end of the pump chamber is connected to the low-pressure water inlet pipeline through the water inlet valve, and the other end is connected to the high-pressure water outlet pipeline through the water outlet valve. Under the reciprocating motion of the plunger, the spring and water are used to The pressure periodically closes and opens the water inlet and outlet valves to achieve the desired high-pressure water, and the car is washed with the assistance of the high-pressure water pipe and the water gun spray rod.

After searching the prior art documents, the following relevant patent documents were found:

Chinese patent: ZL200720070954.5--Pressure relief and automatic shutdown device;

International publication number: WO92/15783--pump;

German patent: DE19548498C1--press plate. ;

In the above-mentioned published patent documents, there are following defects:

1. The pump cover is made of metal, which requires subsequent processing, poor rust resistance, and high production cost.

2. The design of the water outlet valve assembly of the pump cover system is complex (requires valve seat, valve core, valve cover, spring), the production and installation efficiency is low, and the cost is high.

3. The water outlet plug needs 4 independent plugs and 4 seals, so the production and installation efficiency is low and the cost is high.

Contents of the invention

In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a high-pressure pump cover system, which adopts a simple structure, reduces product cost, improves production and installation efficiency, and is easy to disassemble and maintain.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

A water outlet cavity structure of a high-pressure pump, mainly a water outlet sealing cavity formed by a spring, a water outlet valve, a water outlet valve seat, a pump cover and a water outlet plug, wherein the pump cover is made of plastic material, and the water outlet plug and the water outlet plug are The water outlet valve seat is designed as one piece, and the spring is fixed at one end of the water outlet plug, and at the same time, the water outlet valve is limited. The water outlet valve is in periodic contact with and disconnected from the water outlet sealing surface of the pump cover under the action of the spring. Realize periodic opening/closing of water outlet.

There are three water outlet valves and three springs, and the two are connected correspondingly.

The outlet valve seat is provided with a spring detent for positioning the spring.

The spring clamping position is designed as a structure in which the water outlet valve seat is recessed inward or protruded outward at the position where the spring is installed.

The water outlet valve seat is provided with a water outlet valve stop for guiding and limiting the water outlet valve.

The detent of the water outlet valve is a detent located around the detent of the spring.

The water outlet valve seat and the water outlet sealing surface of the pump cover are sealed by a sealing ring.

The position between the outlet valve seat and the pump cover is limited by the pin of the plug plug.

One end of the water outlet plug is also provided with a water outlet plug handle to facilitate the loading and unloading of the water outlet plug.

The pump cover is fixed on the pump body through a pressing plate, the pressing plate is pressed and locked on the pump body, and the generated pre-tightening force is used to counteract the water pressure of the pump cover.

The pressing plate is pressed and locked on the pump body through screws.

Compared with the prior art, the present invention has the following beneficial effects:

1. The water outlet valve seat is used as the base of the water outlet valve and the plug of the water outlet valve at the same time. Compared with the method in which the water outlet valve seat and the water outlet plug are separately set in the prior art, it is easier to improve the sealing effect.

2. The integrated design of the water outlet valve seat and the water outlet plug, that is, there is only one water outlet plug. Compared with the way in which multiple water outlet plugs are independently arranged in the prior art, the production and installation efficiency is improved and the cost is reduced.

3. The pump cover is made of plastic material, free of processing, the body is rust-proof, and can be directly sealed with the water outlet valve. Compared with the pump cover made of metal material in the prior art, the processing and production costs are reduced, and the sealing effect is better.

4. After the water outlet plug made integrally with the outlet valve seat is installed on the pump cover, the outlet plug is further strengthened through the pin-type limit between the pin on the plug plug and the outer end of the pump cover. The water outlet plug can be assembled with the pump cover in a sealed manner under the pressure of the water flow.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Fig. 1 is a schematic structural view of a piston pump equipped with a water outlet chamber provided by the present invention;

Fig. 2 is a sectional view along A-A direction of Fig. 1;

Fig. 3 is a sectional view along B-B direction of Fig. 1 .

Detailed ways

The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

As shown in Figures 1 to 3, the piston pump equipped with the water outlet chamber structure of the present invention includes a pump body 4 and the water outlet chamber structure provided by the present invention. The water outlet cavity structure includes a pump cover 3 installed on a pump body 4 and a water outlet valve seat 7 . The water outlet valve seat 7 and the pump cover 3 form a water outlet sealing chamber. A water outlet valve 5 and a spring 6 are installed in the water outlet sealing chamber, a water outlet sealing surface 10 of the pump cover is formed between the water outlet sealing chamber and the pump cover, and a water outlet valve sealing surface 11 is formed between the water outlet sealing chamber and the pump cover. The outlet valve seat 7 serves as the base of the outlet valve and the outlet plug of the outlet valve simultaneously. The surface of the outlet valve seat 7 is provided with several outlet valve base devices 16. One end of the spring 6 is connected to the outlet valve base device 16, and the other end of the spring is connected to the outlet valve 5. The outlet valve 5 is connected to the outlet of the pump cover under the action of the spring 6. The sealing surface is periodically contacted and disconnected to realize periodic opening/closing of water outlet.

The pump cover 3 is integrally made of plastic material, free of machining, and low in cost.

There are three water outlet valve base devices 16, and there are three water outlet valves 5 and springs 6 matched with the water outlet valve base device 16.

One end of the three springs 6 is positioned by the three outlet valve base devices 16 provided on the surface of the outlet valve seat. A spring locking device 12 is provided on the outlet valve base device 16 to position the spring 6 . The spring clamping device 12 can be designed as an inwardly recessed structure on the water outlet valve base device 16, so that one end of the spring can be embedded and positioned. It can also be designed as a small boss structure protruding outward on the water outlet valve base device 16, so that one end of the spring can be inserted into the boss for positioning.

The water outlet valve base device 16 is also provided with a water outlet valve clamping device 17 for guiding and limiting the water outlet valve 5 . The water outlet valve locking device 17 may be several locking teeth arranged around the spring locking device 12 . Sealing ring 8 is used for sealing between the water outlet valve seat and the pump cover water outlet sealing surface at the front end of the pump body.

One end of the pump cover 3 is provided with two or more limit holes 18 on the upper surface of the position where the outlet valve seat 7 is installed. or more plug pin pins 14 are inserted into the limit hole 18 provided on the pump cover 2, and the pump cover 3 is limited by the plug type.

In order to facilitate the assembly, disassembly and maintenance of the water outlet valve seat 7, a water outlet plug handle 13 is provided on one end surface of the water outlet valve seat 7. The installation and disassembly between the water outlet valve base 7 and the pump cover 3 is realized by pushing and pulling the water outlet plug handle 13 .

A pressing plate 2 is arranged on the upper surface of the pump cover 3 , and the pressing plate 2 is locked on the pump body 4 through the screw 1 . When working, the water pressure on the pump cover 3 is offset by the pre-tightening force generated by the screw 1 pressing the pressure plate 2 and locking it on the pump body 4 . The pressing position of the screw 1 on the pump body 4 is the pressing plate surface 15 .

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention.

Claims (10)

1. A water outlet cavity structure of a high-pressure pump, characterized in that it comprises: a spring, a water outlet valve, a water outlet valve seat, and a pump cover, and the water outlet valve seat and the pump cover form a water outlet sealing cavity, wherein the water outlet valve seat At the same time as the base of the water outlet valve and the plug of the water outlet valve, the surface of the water outlet valve seat is provided with several water outlet valve base devices, one end of the spring is connected with the water outlet valve base device, and the other end of the spring is connected with the water outlet valve. Under the action of the spring, the water outlet valve periodically contacts and disconnects with the water outlet sealing surface of the pump cover to realize periodic opening/closing of the water outlet. 2. The water outlet cavity structure of the high-pressure pump according to claim 1, wherein there are three outlet valve base devices, and three outlet valves and springs matched with the outlet valve base devices. 3. The water outlet cavity structure of the high-pressure pump according to claim 1, wherein the pump cover is made of plastic. 4 . The water outlet cavity structure of the high pressure pump according to claim 1 , wherein the water outlet valve base device is provided with a spring clamping device for positioning the spring. 5 . The water outlet cavity structure of the high pressure pump according to claim 4 , wherein the spring locking device is designed as an inwardly recessed or outwardly protruding structure on the base device of the water outlet valve. 5 . 6 . The water outlet cavity structure of the high pressure pump according to claim 4 , wherein the water outlet valve base device is provided with a water outlet valve clamping device for guiding and limiting the water outlet valve. 6 . 7 . The water outlet chamber structure of the high pressure pump according to claim 6 , wherein the water outlet valve locking device is a locking tooth arranged around the spring locking device. 7 . 8. The outlet chamber structure of the high-pressure pump according to claim 1, further comprising a plug and pin, and the pins of the plug and pin place a plug-type position between the outlet valve seat and the outer end of the pump cover. 9. The water outlet cavity structure of the high-pressure pump according to claim 1, wherein a water outlet plug handle is provided at one end of the water outlet plug to facilitate loading and unloading of the water outlet plug. 10. The water outlet chamber structure of the high-pressure pump according to claim 1, wherein the pump cover is fixed on the pump body through a pressure plate, and the pressure plate is pressed and locked on the pump body, resulting in a preload The force is used to counteract the water pressure on the pump cover.