CN220646814U - Valve capable of preventing impurity from damaging sealing surface during closing - Google Patents
Valve capable of preventing impurity from damaging sealing surface during closing Download PDFInfo
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- CN220646814U CN220646814U CN202322388199.7U CN202322388199U CN220646814U CN 220646814 U CN220646814 U CN 220646814U CN 202322388199 U CN202322388199 U CN 202322388199U CN 220646814 U CN220646814 U CN 220646814U
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Abstract
The utility model provides a valve for preventing impurities from damaging a sealing surface during closing, which comprises a valve body and a valve rod; a valve cavity is arranged in the valve body; the valve body is provided with a water inlet and a water outlet which are communicated with the valve cavity; a valve seat and an annular valve cage are arranged in the valve cavity; the annular valve cage and the valve seat are provided with cavities; the valve seat is in sealing fit with the valve body; a sealing ring is arranged at the cavity of the valve seat and the annular valve cage; a switch piece is arranged at the valve cavity; the switch piece comprises a main valve core arranged in the cavity; the outer end of the main valve core is hermetically sleeved with an auxiliary valve core; a placing cavity is arranged on the auxiliary valve core; the valve rod penetrates through the placement cavity and is connected with the main valve core; the annular valve cage is provided with a water inlet end communicated with the valve cavity; the placing cavity is internally provided with a spring sleeved on the valve rod, so that the sealing ring on the valve seat is protected conveniently.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a valve for preventing impurities from damaging a sealing surface during closing.
Background
A valve (valve) is a device for controlling various media such as liquid in pipes and devices, and is generally composed of a valve body, a valve cover, a packing pressing plate, a switch member, etc. The valve is controlled by making the switch piece move up and down and controlling the valve cavity to realize the flow speed.
The existing valve has no structure for preventing particle impurities, and in use, particles are often pressed on a valve seat sealing surface by a valve core of a switch piece when the valve is closed, so that the valve is damaged after leakage, the service life is short, and the maintenance cost is high.
Disclosure of Invention
The valve for preventing impurities from damaging the sealing surface during closing is convenient for protecting the sealing ring on the valve seat.
The utility model provides a valve for preventing impurities from damaging a sealing surface during closing, which comprises a valve body and a valve rod; a valve cavity is arranged in the valve body; the valve body is provided with a water inlet and a water outlet which are communicated with the valve cavity; a valve seat and an annular valve cage are arranged in the valve cavity; the annular valve cage and the valve seat are provided with cavities; the valve seat is in sealing fit with the valve body; a sealing ring is arranged at the cavity of the valve seat and the annular valve cage; a switch piece is arranged at the valve cavity; the switch piece comprises a main valve core arranged in the cavity; the outer end of the main valve core is hermetically sleeved with an auxiliary valve core; a placing cavity is arranged on the auxiliary valve core; the valve rod penetrates through the placement cavity and is connected with the main valve core; the annular valve cage is provided with a water inlet end communicated with the valve cavity; the placing cavity is internally provided with a spring sleeved on the valve rod.
Further, a valve cover is arranged at the upper end of the valve body; the valve cover is connected with the valve body through bolts.
Further, a packing pressing plate is arranged at the upper end of the valve cover; the packing pressing plate is connected with the valve cover through a second bolt; the valve rod passes through the valve cover and the packing pressing plate in a sealing way.
Further, the auxiliary valve core is of a cylinder structure; an annular straight-face transition face is arranged on the outer end face of the auxiliary valve core; an annular edge is arranged in the cavity of the annular valve cage; the annular edge is attached to the annular straight transition surface.
Further, a lantern ring fixedly connected with the auxiliary valve core is arranged in the placing cavity; the lantern ring is in sealing fit with the valve rod; the second lantern ring fixedly sleeved on the valve rod is sealed and attached in the placing cavity; the upper end and the lower end of the spring are respectively abutted against the lantern ring and the second lantern ring.
The utility model has the beneficial effects that: according to the valve for preventing the impurity from damaging the sealing surface during closing, the auxiliary valve core is closed firstly, the impurity in the medium is prevented from flowing into the lower end valve cage, and then the main valve core is closed after the sealing surface of the main valve core is flushed by the clean medium after depressurization, so that the sealing ring on the valve seat is protected conveniently.
Drawings
FIG. 1 is a cross-sectional view of a valve of the present utility model that prevents contaminants from damaging the sealing surfaces during closing.
FIG. 2 is a cross-sectional view of a main valve core and an auxiliary valve core of a valve for preventing impurities from damaging a sealing surface when the valve is closed (1, valve body; 2, valve cavity; 3, water inlet; 4, water outlet; 5, annular valve cage; 6, valve seat; 7, sealing ring; 8, main valve core; 9, auxiliary valve core; 10, placing cavity; 11, valve rod; 12, water inlet end; 13, spring; 14, valve cover; 15, bolt; 16, annular straight transition surface; 17, annular rim; 18, packing pressing plate; 19, second bolt; 20, collar; 21, second collar)
Detailed Description
The utility model will be further described with reference to the accompanying drawings
According to the valve shown in fig. 1 and 2, the valve for preventing impurities from damaging a sealing surface during closing comprises a valve body 1 and a valve rod 11; a valve cavity 2 is arranged in the valve body 1; the valve body 1 is provided with a water inlet 3 and a water outlet 4 which are communicated with the valve cavity 2; a valve seat 6 and an annular valve cage 5 are arranged in the valve cavity 2; cavities are arranged on the annular valve cage 5 and the valve seat 6; the valve seat 6 is in sealing fit with the valve body 1; the sealing rings 7 are arranged at the valve seat 6 and the cavity of the annular valve cage 5; a switch piece is arranged at the valve cavity 2; the switch piece comprises a main valve core 8 arranged in the cavity; the outer end of the main valve core 8 is hermetically sleeved with an auxiliary valve core 9; a placing cavity 10 is arranged on the auxiliary valve core 9; the valve rod 11 passes through the placing cavity 10 and is connected with the main valve core 8; the annular valve cage 5 is provided with a water inlet end 12 communicated with the valve cavity 2; a spring 13 sleeved on the valve rod 11 is arranged in the placing cavity 10.
The upper end of the valve body 1 is provided with a valve cover 14; the valve cover 14 is connected with the valve body 1 through a bolt 15, the valve cover 14 is connected with the valve body 1 through the bolt 15, the bolt 15 is rotated to be taken down, the valve cover 14 and the valve body 1 are conveniently detached, and the main valve core 8 and the auxiliary valve core 9 are inspected.
The upper end of the valve cover 14 is provided with a packing pressing plate 18; the packing pressing plate 18 is connected with the valve cover 14 through a second bolt 19; the valve rod 11 passes through the valve cover 14 and the packing pressing plate 18 in a sealing manner, the packing pressing plate 18 is connected with the valve cover 14 through a second bolt 19, and the second bolt 19 is rotated to be taken down, so that the packing pressing plate 18 and the valve cover 14 are conveniently detached.
The auxiliary valve core 9 is of a cylinder structure; an annular straight-face transition surface 16 is arranged on the outer end face of the auxiliary valve core 9; an annular edge 17 is arranged in the cavity of the annular valve cage 5; the annular edge 17 is attached to the annular straight-face transition surface 16, and the annular edge 17 is attached to the annular straight-face transition surface 16, so that tightness is guaranteed, and medium leakage is avoided.
The placing cavity 10 is internally provided with a lantern ring 20 fixedly connected with the auxiliary valve core 9; the lantern ring 20 is in sealing fit with the valve rod 11; a second lantern ring 21 fixedly sleeved on the valve rod 11 is sealed and attached in the placing cavity 10; the upper end and the lower end of the spring 13 are respectively abutted against the lantern ring 20 and the second lantern ring 21, the lantern ring 20 and the second lantern ring 21 play a role in supporting and compressing the spring, and when the valve rod 11 moves downwards, the spring 13 can extrude the auxiliary valve core 9, so that the annular rim 17 is attached to the annular straight-face transition surface 16.
The principle of the utility model is as follows: when the valve rod 11 moves downwards in use, under the action of the spring 13, the annular straight transition surface 16 of the auxiliary valve core 9 is in sealing fit with the annular edge 17, medium is prevented from flowing into the lower annular valve cage 5, the medium is prevented from being continuously passed, after the main valve core 8 is flushed by clean medium after depressurization, no impurity is arranged on the main valve core 8, the valve rod 11 is continuously moved downwards, the main valve core 8 is pressed against the sealing ring 7, the closing effect is ensured, no impurity is arranged on the main valve core 8, the sealing ring 7 is prevented from being damaged, the annular valve cage 5 is designed into a large inner cavity, the flow speed and the pressure are greatly reduced, and cavitation erosion of the sealing ring 7 is prevented.
While the utility model has been described with reference to the preferred embodiments, it is not limited thereto, and various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the utility model, which is to be limited only by the appended claims.
Claims (5)
1. A valve for preventing impurities from damaging a sealing surface during closing comprises a valve body (1) and a valve rod (11); the method is characterized in that: a valve cavity (2) is arranged in the valve body (1); a water inlet (3) and a water outlet (4) which are communicated with the valve cavity (2) are arranged on the valve body (1); a valve seat (6) and an annular valve cage (5) are arranged in the valve cavity (2); the annular valve cage (5) and the valve seat (6) are provided with cavities; the valve seat (6) is in sealing fit with the valve body (1); the sealing rings (7) are arranged at the cavities of the valve seat (6) and the annular valve cage (5); a switch piece is arranged at the valve cavity (2); the switch piece comprises a main valve core (8) arranged in the cavity; an auxiliary valve core (9) is sleeved at the outer end of the main valve core (8) in a sealing and jointing manner; a placing cavity (10) is arranged on the auxiliary valve core (9); the valve rod (11) passes through the placing cavity (10) and is connected with the main valve core (8); a water inlet end (12) communicated with the valve cavity (2) is arranged on the annular valve cage (5); a spring (13) sleeved on the valve rod (11) is arranged in the placement cavity (10).
2. A valve for preventing contaminants from damaging a sealing surface during closing as defined in claim 1, wherein: a valve cover (14) is arranged at the upper end of the valve body (1); the valve cover (14) is connected with the valve body (1) through bolts (15).
3. A valve for preventing contaminants from damaging a sealing surface during closing as defined in claim 2, wherein: the upper end of the valve cover (14) is provided with a packing pressing plate (18); the packing pressing plate (18) is connected with the valve cover (14) through a second bolt (19); the valve rod (11) passes through the valve cover (14) in a sealing way and the packing pressing plate (18).
4. A valve for preventing contaminants from damaging a sealing surface during closing as defined in claim 1, wherein: the auxiliary valve core (9) is of a cylinder structure; an annular straight-face transition surface (16) is arranged on the outer end face of the auxiliary valve core (9); an annular edge (17) is arranged in the cavity of the annular valve cage (5); the annular edge (17) is attached to the annular straight transition surface (16).
5. A valve for preventing contaminants from damaging a sealing surface during closing as defined in claim 1, wherein: a lantern ring (20) fixedly connected with the auxiliary valve core (9) is arranged in the placing cavity (10); the lantern ring (20) is in sealing fit with the valve rod (11); a second lantern ring (21) fixedly sleeved on the valve rod (11) is sealed and attached in the placing cavity (10); the upper end and the lower end of the spring (13) are respectively abutted against the lantern ring (20) and the second lantern ring (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322388199.7U CN220646814U (en) | 2023-09-04 | 2023-09-04 | Valve capable of preventing impurity from damaging sealing surface during closing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322388199.7U CN220646814U (en) | 2023-09-04 | 2023-09-04 | Valve capable of preventing impurity from damaging sealing surface during closing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220646814U true CN220646814U (en) | 2024-03-22 |
Family
ID=90296688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322388199.7U Active CN220646814U (en) | 2023-09-04 | 2023-09-04 | Valve capable of preventing impurity from damaging sealing surface during closing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220646814U (en) |
-
2023
- 2023-09-04 CN CN202322388199.7U patent/CN220646814U/en active Active
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