CN217002253U

CN217002253U - Plunger pump liquid inlet and outlet valve core

Info

Publication number: CN217002253U
Application number: CN202122022640.0U
Authority: CN
Inventors: 王新柱; 李孝岭; 李明海; 刘纪祥; 曹振峰; 刘帅; 郭翔; 李振宁; 谢正; 周子军; 刘俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-07-19
Anticipated expiration: 2031-08-26

Abstract

The utility model discloses a valve core of a liquid inlet and outlet valve of a plunger pump, which comprises a valve core cone, wherein a guide rod is arranged in the valve core cone, and a threaded column is arranged at the tail end of the guide rod; the guide gland is sleeved outside the guide rod, a secondary spring is connected below the guide gland, a primary spring is sleeved outside the secondary spring, and a guide hole is formed in the joint of the guide gland and the guide rod; the valve rubber is sleeved outside the valve core cone, a spring groove is formed in the joint of the valve core cone and the primary spring, and a clamping groove is formed in the joint of the valve rubber and the valve core cone. Compared with the existing device, the plunger pump inlet and outlet valve core divides the original valve core into a valve core cone and a guide rod, and the valve core cone and the guide rod are connected through the threaded columns to replace the previous integral type, so that the dividing function is realized, namely the valve core guide rod is transformed to realize local replacement and integral replacement.

Description

Plunger pump liquid inlet and outlet valve core

Technical Field

The utility model relates to the technical field of valve cores, in particular to a valve core of a liquid inlet and outlet valve of a plunger pump.

Background

The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body, so that the volume of the sealed working cavity changes to realize liquid suction and liquid discharge. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like. Plunger pumps are widely used in applications where high pressure, high flow and flow needs to be regulated, such as hydraulic machines, engineering machinery and ships.

In the long-term use process of the existing liquid inlet and outlet valve, a valve core guide rod is of an integrated structure, the valve core needs to be integrally replaced after being damaged, other parts are good, resources are wasted due to integral assembly and disassembly, the cost is high, the valve core guide rod and a valve cover guide hole are in contact friction in reciprocating motion, the valve cover guide hole and the valve core guide rod are made of the same material and have the same hardness, and the valve cover guide hole is easily abraded.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a valve core of a plunger pump liquid inlet and outlet valve, which aims to solve the problems that in the background technology, a valve core guide rod is of an integrated structure, the valve core needs to be integrally replaced after being damaged, other parts are good, the resources are wasted due to the integral assembly and disassembly, the cost is high, the valve core guide rod and a valve cover guide hole are in contact friction in the reciprocating motion, the valve cover guide hole and the valve core guide rod are made of the same material and have the same hardness, and the valve cover guide hole is easy to wear.

In order to achieve the purpose, the utility model provides the following technical scheme: a plunger pump inlet and outlet valve cartridge comprising:

the valve core cone is internally provided with a guide rod, and the tail end of the guide rod is provided with a threaded column;

the guide gland is sleeved outside the guide rod, a secondary spring is connected below the guide gland, a primary spring is sleeved outside the secondary spring, and a guide hole is formed in the joint of the guide gland and the guide rod;

the valve rubber is sleeved outside the valve core cone, a spring groove is formed in the joint of the valve core cone and the primary spring, and a clamping groove is formed in the joint of the valve rubber and the valve core cone.

Preferably, the guide gland is further provided with:

and the valve cover is fixed above the guide gland, and the guide gland and the valve cover are integrally formed.

Preferably, the guide gland is elastically connected with the valve core cone through a secondary spring, and the valve cover is elastically connected with the valve core cone through a primary spring.

Preferably, the valve core cone is further provided with:

the crosshead is arranged below the valve core cone, a valve seat is arranged outside the crosshead, and the valve seat is connected with the valve cover through a fine thread pair.

Preferably, the primary spring and the valve core cone form a detachable structure through a spring groove, the diameter of the primary spring is larger than that of the secondary spring, and the secondary spring is movably connected with the guide gland.

Preferably, the valve rubber and the valve core cone form a detachable structure through the clamping groove, and the valve core cone and the valve seat are sealed mutually through the valve rubber.

Preferably, the valve core cone is in threaded connection with the guide rod through the threaded column, and the guide rod is made of tin-phosphor bronze.

Compared with the prior art, the utility model provides the valve core of the liquid inlet and outlet valve of the plunger pump, which has the following beneficial effects: this plunger pump advances flowing back valve case does not have wearing and tearing basically through the tin phosphor bronze guide bar and the valve gap guiding hole that set up, and the guide bar is difficult not hard up simultaneously, and the maintenance frequency of this case is unanimous with former factory's case moreover, nevertheless compare in former case needs the whole change, at present only need at every turn local change tin phosphor bronze guide bar and sealed with valve rubber can, greatly reduced cost of maintenance.

1. The original valve core is split into a valve core cone and a guide rod, and the valve core cone and the guide rod are connected through a threaded column to replace the original integral structure, so that the splitting function is realized, namely the valve core guide rod is transformed to realize the local replacement instead of the integral replacement;

2. according to the utility model, the material of the guide rod is optimized from dual-phase steel 2205 to the material of the tin-phosphor bronze, as the tin-phosphor bronze is low in friction coefficient, good in wear resistance and self-lubricating property, the abrasion loss of the guide rod is reduced and the phase change is carried out under the same condition, so that the service life of the guide rod is prolonged, the hardness (140 plus 205HV) of the tin-phosphor bronze is far lower than that (less than or equal to 325HV) of the dual-phase steel 2205, the hardness of the guide rod is reduced, the soft-hard matching of the two materials is realized, the guide rod made of the softer tin-phosphor bronze is sacrificed to replace the protection of the valve cover, and the local replacement of the guide hole instead of the whole replacement is realized;

3. the utility model can be freely disassembled and assembled by the primary spring and the secondary spring, and can be selectively used according to the pressure of inlet and outlet liquid, thereby avoiding the problem of liquid inlet and outlet blockage caused by the incapability of adapting to different pressures during liquid inlet and liquid outlet.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the valve core cone of the present invention;

FIG. 3 is a side view of the cone of the present invention;

fig. 4 is a side view structural schematic diagram of the valve cover of the present invention.

In the figure: 1. a valve core cone; 2. a valve rubber sheet; 3. a guide bar; 4. a threaded post; 5. a primary spring; 6. a secondary spring; 7. a guide gland; 8. a valve cover; 9. a valve seat; 10. a spring slot; 11. a card slot; 12. a crosshead; 13. and (4) a guide hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 3, a valve core of a liquid inlet and outlet valve of a plunger pump comprises: the valve core cone 1 is internally provided with a guide rod 3, and the tail end of the guide rod 3 is provided with a threaded column 4; a guide hole 13 is formed at the joint of the guide gland 7 and the guide rod 3; an original valve core is split into a valve core cone 1 and a guide rod 3, a threaded column 4 at the tail end of the guide rod 3 is connected with an internal threaded hole of the valve core cone 1 to replace the previous integral type, the splitting function is realized, namely, the valve core guide rod is changed to realize local replacement instead of whole replacement, the valve core cone 1 is in threaded connection with the guide rod 3 through the threaded column 4, and the guide rod 3 is made of tin-phosphor bronze; the valve cover 8 is fixed above the guide gland 7, and the guide gland 7 and the valve cover 8 are integrally formed; the crosshead 12 is arranged below the valve core cone 1, a valve seat 9 is arranged outside the crosshead 12, the valve seat 9 is connected with the valve cover 8 through a fine thread pair, the material of the guide rod 3 is optimized to be a tin-phosphor bronze material from dual-phase steel 2205, the tin-phosphor bronze material has low friction coefficient and good wear resistance and self-lubricating property, the abrasion loss of the guide rod 3 is reduced and phase change is carried out under the same condition, the service life of the guide rod is prolonged, the hardness (140 plus 205HV) of the tin-phosphor bronze material is far lower than that (less than or equal to 325HV) of the dual-phase steel 2205, the hardness of the guide rod 3 is reduced, soft and hard matching of the two materials is realized, the guide rod 3 made of the softer tin-phosphor bronze material is sacrificed to replace the protection of the valve cover 8, and the local replacement of the guide hole 13 is realized to replace the whole replacement.

As shown in fig. 1 and 4, a valve core of a liquid inlet and outlet valve of a plunger pump comprises: the valve rubber 2 is sleeved outside the valve core cone 1, a spring groove 10 is arranged at the joint of the valve core cone 1 and the primary spring 5, a clamping groove 11 is arranged at the joint of the valve rubber 2 and the valve core cone 1, the valve rubber 2 and the valve core cone 1 form a detachable structure through the clamping groove 11, the valve core cone 1 and the valve seat 9 are mutually sealed through the valve rubber 2, the guide gland 7 is sleeved outside the guide rod 3, the secondary spring 6 is connected below the guide gland 7, the primary spring 5 is sleeved outside the secondary spring 6, the guide gland 7 is elastically connected with the valve core cone 1 through the secondary spring 6, the valve cover 8 is elastically connected with the cone 1 through the primary spring 5, the primary spring 5 and the valve core cone 1 form a detachable structure through the spring groove 10, the diameter of the primary spring 5 is larger than that of the secondary spring 6, and the secondary spring 6 is movably connected with the guide gland 7, through the one-level spring 5 and the second grade spring 6 that set up, can freely dismantle the equipment, carry out the selectivity according to the pressure size of business turn over liquid and use to avoid because of the different pressure when unable adaptation feed liquor and flowing back, lead to advancing the obstructed problem of flowing back.

The working principle is as follows: when the plunger pump is used for the valve core of the liquid inlet and outlet valve, firstly, a proper primary spring 5 and a proper secondary spring 6 are selected according to requirements, and in the process that the valve core cone 1 is separated from the valve cover 8, the primary spring 5 can be disassembled, so that the requirement of small pressure during liquid inlet is met, and when the primary spring 5 and the secondary spring 6 are used in a combined mode, the valve body can resist larger pressure, so that the requirement of large pressure during liquid outlet is met; secondly, the internal thread hole of the valve core cone 1 is connected with the thread post 4 at the tail end of the guide rod 3, and the guide rod 3 can be directly screwed in the process of disassembling the valve core, so that the guide rod 3 can be disassembled, and the guide rod 3 can be replaced; finally, in use, the crosshead 12 reciprocates inside the valve seats 9 to change the space between the valve seats 9, and at the same time, the primary spring 5 and the secondary spring 6 are compressed to smoothly pass the liquid, and the guide rod 3 moves inside the guide hole 13, which is the working principle of the valve core of the intake/discharge valve of the plunger pump.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a plunger pump liquid inlet and outlet valve case which characterized in that includes:

the valve core cone (1), a guide rod (3) is installed inside the valve core cone (1), and a threaded column (4) is arranged at the tail end of the guide rod (3);

the guide gland (7) is sleeved outside the guide rod (3), a secondary spring (6) is connected below the guide gland (7), a primary spring (5) is sleeved outside the secondary spring (6), and a guide hole (13) is formed in the joint of the guide gland (7) and the guide rod (3);

the valve rubber (2) is sleeved outside the valve core cone (1), a spring groove (10) is formed in the joint of the valve core cone (1) and the primary spring (5), and a clamping groove (11) is formed in the joint of the valve rubber (2) and the valve core cone (1).

2. The valve core of the liquid inlet and outlet valve of the plunger pump according to claim 1, wherein the guide gland (7) is further provided with:

and the valve cover (8) is fixed above the guide gland (7), and the guide gland (7) and the valve cover (8) are integrally formed.

3. The valve core of the liquid inlet and outlet valve of the plunger pump according to claim 2, characterized in that the guide gland (7) is elastically connected with the valve core cone (1) through a secondary spring (6), and the valve cover (8) is elastically connected with the valve core cone (1) through a primary spring (5).

4. The valve core of the liquid inlet and outlet valve of the plunger pump according to claim 2, wherein the core cone (1) is further provided with:

and the crosshead (12) is arranged below the valve core cone (1), a valve seat (9) is arranged outside the crosshead (12), and the valve seat (9) is connected with the valve cover (8) through a fine thread pair.

5. The valve core of the liquid inlet and outlet valve of the plunger pump according to claim 1, characterized in that the primary spring (5) and the valve core cone (1) form a detachable structure through a spring groove (10), the diameter of the primary spring (5) is larger than that of the secondary spring (6), and the secondary spring (6) is movably connected with the guide gland (7).

6. The valve core of the liquid inlet and outlet valve of the plunger pump according to claim 4, wherein the valve rubber (2) and the valve core cone (1) form a detachable structure through the clamping groove (11), and the valve core cone (1) and the valve seat (9) are sealed with each other through the valve rubber (2).

7. The valve core of the liquid inlet and outlet valve of the plunger pump according to claim 1, wherein the valve core cone (1) is in threaded connection with the guide rod (3) through the threaded column (4), and the guide rod (3) is made of tin-phosphor bronze.