CN215908409U

CN215908409U - Novel sealing structure of water filling valve of hydraulic pressure testing machine

Info

Publication number: CN215908409U
Application number: CN202121775003.4U
Authority: CN
Inventors: 戴之海
Original assignee: Saint Gobain Pipeline System Co Ltd; Hangzhou Shengyu New Material Technology Co Ltd
Current assignee: Saint Gobain Pipeline System Co Ltd; Hangzhou Shengyu New Material Technology Co Ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2022-02-25
Anticipated expiration: 2031-08-02

Abstract

The utility model discloses a novel sealing structure of a water filling valve of a water pressure testing machine, and relates to the technical field of leakage-proof valves. The novel sealing structure of the water filling valve of the water pressure test machine comprises a valve core and a valve seat, wherein the valve core comprises a valve core body, an annular groove is formed in the bottom surface of the valve core body, and a sealing gasket is arranged in the annular groove. The novel sealing structure of the water filling valve of the hydraulic pressure test machine is characterized in that the bottom of the valve core is provided with an annular groove, a polytetrafluoroethylene sealing gasket is arranged in the annular groove, the novel sealing structure can be slightly deformed, the novel sealing structure can be well in close contact even if the valve core and the valve seat are not concentric or the water quality is not clean, after improvement, the failure rate of the water filling valve is reduced by about 90 percent through statistics, and the normal operation of the whole equipment is ensured. The cost of manpower and material resources is greatly reduced. The utility model has the advantages of low requirement on the use environment, low modification cost, simple maintenance, long service life and the like. The problem that similar valves are poor in sealing effect can be solved in a popularized mode.

Description

Novel sealing structure of water filling valve of hydraulic pressure testing machine

Technical Field

The utility model relates to the technical field of leakage-proof valves, in particular to a novel sealing structure of a water filling valve of a hydraulic pressure test machine.

Background

In order to ensure the quality of the ductile cast iron pipes produced by the Mucun bridge, each ductile cast iron pipe needs to pass a pressure test and then flows into the next process. This process is also a critical process for testing the product for inherent defects. The water pressure of the whole hydraulic press system cannot reach the required value due to the fact that the water filling valve leaks in the original equipment of a company in the production process. The quality of the product cannot be accurately and effectively tested. The main reason for the internal leakage of the flush valve is the poor sealing between the valve core and the valve seat.

The main reason for the internal leakage of the flush valve is the poor seal between the valve core and the valve seat. From this point of view, it is desirable to improve the sealing form inside the water filling valve, thereby meeting the problem.

The water filling valve plays a sealing role by the close fit of the valve core and the valve seat. The original valve core and valve seat are made of stainless steel, and the end of valve core is processed into spherical shape to contact with concave spherical surface of valve seat for sealing. But in actual use, the valve core and the valve seat may be not concentric, so that the sealing is not tight. The water quality is not clean, granular impurities exist, and the sealing surface is not contacted well to cause water leakage. The valve core and the valve seat which are both made of stainless steel can damage the sealing surface through impact, so that the sealing is failed.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a novel sealing structure of a water filling valve of a water pressure test machine, and solves the problem that the existing stainless steel valve core is not tightly matched with a valve seat.

(II) technical scheme

In order to achieve the purpose, the utility model is realized by the following technical scheme: the utility model provides a novel seal structure of water pressure test machine water filling valve, includes case, disk seat, the case includes the case body, the ring groove has been seted up to the bottom surface of case body, the ring inslot is provided with sealed the pad, the ring groove is one of clearance fit and transition fit with sealed cooperation tolerance that fills up.

Preferably, the valve seat comprises a valve seat body, and a sealing groove is formed in the valve seat body.

Preferably, the upper end of the valve seat body is provided with a matching groove.

Preferably, the inner side of the upper end of the valve seat body is provided with a groove.

Preferably, the bottom of the valve core is provided with a threaded hole, and the top of the valve core is provided with a valve rod.

Preferably, the material of the sealing gasket is polytetrafluoroethylene.

(III) advantageous effects

The utility model provides a novel sealing structure of a water filling valve of a hydraulic pressure test machine. The method has the following beneficial effects:

the novel sealing structure of the water filling valve of the hydraulic pressure test machine is characterized in that the bottom of the valve core is provided with an annular groove, a polytetrafluoroethylene sealing gasket is arranged in the annular groove, the novel sealing structure can be slightly deformed, the novel sealing structure can be well in close contact even if the valve core and the valve seat are not concentric or the water quality is not clean, after improvement, the failure rate of the water filling valve is reduced by about 90 percent through statistics, and the normal operation of the whole equipment is ensured. The cost of manpower and material resources is greatly reduced. The utility model has the advantages of low requirement on the use environment, low modification cost, simple maintenance, long service life and the like. The problem that similar valves are poor in sealing effect can be solved in a popularized mode.

Drawings

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

FIG. 2 is a disassembled view of the present invention;

FIG. 3 is a schematic view of the valve cartridge (without a gasket);

FIG. 4 is a schematic view of the valve cartridge (with gasket);

FIG. 5 is a cross-sectional view of the gasket;

FIG. 6 is a side view of the gasket;

FIG. 7 is a schematic view of a valve seat structure;

FIG. 8 is a top view of a valve seat structure.

In the figure: 1. a valve stem; 2. a valve core; 21. a valve core body; 22. a circular groove; 23. a threaded hole; 3. a gasket; 4. a valve seat; 41. a valve seat body; 42. a mating groove; 43. a sealing groove; 44. beveling; 45. a valve seat bore.

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.

Example 1: basic unit for implementing the function of the utility model

The utility model provides a novel seal structure of water pressure test machine water filling valve, includes case 2, disk seat 4, and case 2 includes case body 21, and annular groove 22 has been seted up to the bottom surface of case body 21, is provided with sealed pad 3 in the annular groove 22, and annular groove 22 is one of clearance fit and transition fit with sealed 3's fit tolerance.

In a specific embodiment, the thickness of the sealing gasket 3 is generally greater than the depth of the annular groove 22.

Example 2: in order to increase the tightness of the valve seat 4 with the valve

The valve seat 4 includes a valve seat body 41, and a seal groove 43 is opened on the valve seat body 41.

When the valve seat 4 is mounted on the valve, a sealing member may be additionally disposed in the sealing groove 43 to increase the sealing performance between the valve seat 4 and the valve.

Example 3: in order to increase the degree of cooperation between the valve seat 4 and the sealing gasket 3

The upper end of the valve seat body 41 is provided with a fitting groove 42.

The fitting groove 42 can reduce the contact area between the upper end of the valve seat body 41 and the gasket 3, and increase the amount of deformation of the gasket 3 to improve the packing with the valve seat body 41.

Example 4: further increasing the degree of matching between the valve seat 4 and the sealing gasket 3

The inner side of the upper end of the valve seat body 41 is provided with a groove 44.

Similarly to embodiment 3, the packing property between the gasket 3 and the valve seat body 41 is also increased.

Example 5: increasing the functionality of the valve cartridge 2

The bottom of the valve core 2 is provided with a threaded hole 23, and the top is provided with a valve rod 1.

In the specific implementation, the valve rod 1 is usually fixed at the top of the valve core 2, and a threaded hole 23 is reserved at the bottom of the valve core 2 for other purposes.

Example 6: determining the material of the gasket 3

The material of the sealing gasket 3 is polytetrafluoroethylene.

The polytetrafluoroethylene material is cheap, and intensity is enough high, and life is longer.

In conclusion, the novel sealing structure of the water filling valve of the hydraulic pressure test machine is characterized in that the bottom of the valve core is provided with the annular groove, the polytetrafluoroethylene sealing gasket is arranged in the annular groove, and the novel sealing structure can be slightly deformed, so that the novel sealing structure can be well in close contact even if the valve core and the valve seat are not concentric or the water quality is not clean, after improvement, the failure rate of the water filling valve is reduced by about 90% through statistics, and the normal operation of the whole device is ensured. The cost of manpower and material resources is greatly reduced. The utility model has the advantages of low requirement on the use environment, low modification cost, simple maintenance, long service life and the like. The problem that similar valves are poor in sealing effect can be solved in a popularized mode.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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 novel seal structure of water pressure test machine water filling valve, includes case (2), disk seat (4), its characterized in that: the valve core (2) comprises a valve core body (21), an annular groove (22) is formed in the bottom surface of the valve core body (21), a sealing gasket (3) is arranged in the annular groove (22), and the annular groove (22) and the sealing gasket (3) are in clearance fit or transition fit.

2. The novel sealing structure of the water filling valve of the hydraulic pressure test machine, according to claim 1, is characterized in that: the valve seat (4) comprises a valve seat body (41), and a sealing groove (43) is formed in the valve seat body (41).

3. The novel sealing structure of the water filling valve of the hydraulic pressure test machine, according to claim 2, is characterized in that: the upper end of the valve seat body (41) is provided with a matching groove (42).

4. The novel sealing structure of the water filling valve of the hydraulic pressure test machine, according to claim 3, is characterized in that: the inner side of the upper end of the valve seat body (41) is provided with a groove (44).

5. The novel sealing structure of the water filling valve of the hydraulic pressure test machine, according to claim 4, is characterized in that: the bottom of the valve core (2) is provided with a threaded hole (23), and the top of the valve core is provided with a valve rod (1).

6. The novel sealing structure of the water filling valve of the hydraulic pressure test machine as claimed in any one of claims 1 to 5, characterized in that: the sealing gasket (3) is made of polytetrafluoroethylene.