CN216519722U

CN216519722U - Valve seat sealing structure

Info

Publication number: CN216519722U
Application number: CN202123253239.4U
Authority: CN
Inventors: 项敬选
Original assignee: Zhejiang Landun Valve Co ltd
Current assignee: Zhejiang Landun Valve Co ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-05-13
Anticipated expiration: 2031-12-21

Abstract

The utility model discloses a valve seat sealing structure which comprises a valve body, a ball body, a first mounting groove arranged in the valve body and a main valve seat arranged in the first mounting groove and matched with the ball body to form a seal, wherein an auxiliary valve seat cushion is arranged between the bottom of the first mounting groove and the main valve seat, graphite sealing rings are arranged among the auxiliary valve seat cushion, the first mounting groove and the main valve seat, a sealing ring is arranged between the first mounting groove and the main valve seat, an elastic piece for driving the auxiliary valve seat cushion to move towards the main valve seat is arranged between the bottom of the first mounting groove and the auxiliary valve seat cushion, and redundant gaps are formed among the elastic piece, the bottom of the first mounting groove and the auxiliary valve seat cushion as well as among the elastic piece and the auxiliary valve seat cushion. The utility model has the following advantages and effects: the utility model can avoid the high-temperature blocking phenomenon and has better sealing effect, thereby being better suitable for the high-temperature use working condition and having better universality and sealing property.

Description

Valve seat sealing structure

Technical Field

The utility model relates to a valve component, in particular to a valve seat sealing structure.

Background

The valve is a control part in a fluid conveying system, has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like, is used for valves of a fluid control system, and has various varieties and specifications from the simplest ball valve to various valves used in an extremely complex automatic control system. The valve can be used for controlling the flow of various types of fluid such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like.

The control of the valve to the fluid medium is mainly realized by the sealing fit between the valve seat and the ball, and the sealing between the valve seat and the valve body plays an important role in the valve. The existing valve seat structure is easy to be stuck with a ball body when meeting high temperature due to the unreasonable design, so that the normal opening and closing of the valve are influenced. Make current disk seat not be applicable to the operating mode of high temperature, the commonality is relatively poor. In addition, the sealing design between the existing valve seat structure and the valve body is poor, so that the existing valve is easy to leak after being used for a long time, and the service life of the valve is finally influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a valve seat sealing structure which can avoid high-temperature blocking phenomenon and has better sealing effect, thereby being better suitable for high-temperature use working conditions and having better universality and sealing property.

The technical purpose of the utility model is realized by the following technical scheme: the utility model provides a disk seat seal structure, includes valve body, spheroid, sets up in the first mounting groove of valve body and sets up in first mounting groove and cooperation spheroid and constitute sealed main valve seat, be equipped with vice disk seat pad between first mounting groove bottom and the main valve seat, be equipped with the graphite sealing ring between vice disk seat pad, first mounting groove and the main valve seat three, be equipped with the sealing washer between first mounting groove and the main valve seat, be equipped with the elastic component that the vice disk seat pad of drive moved towards the main valve seat between first mounting groove bottom and the vice disk seat pad, all be formed with redundant clearance between elastic component and the first mounting groove bottom, between elastic component and the vice disk seat pad.

Through adopting above-mentioned technical scheme, the elastic component exerts the drive power towards spheroid motion to main valve seat through vice valve seat pad, realizes the self-sealing between main valve seat and the spheroid, reaches better sealed effect. The graphite sealing ring is matched with the sealing ring to realize double sealing between the valve seat structure and the valve body, so that a better sealing effect is achieved. When main valve seat and vice valve seat pad took place the inflation because of high temperature, provide the space for the inflation of material through the redundant clearance that forms to avoid because of the card phenomenon of dying that the high temperature appears between main valve seat and the spheroid, thereby be applicable to the operating condition of high temperature better, have better commonality.

Further setting the following steps: the elastic component includes the leaf spring, first installation slot bottom extends and inwards is the throat gradually along the vice valve seat pad direction of dorsad and sets up and form a first inclined plane, vice valve seat pad extends and inwards is the throat gradually along the main valve seat direction of dorsad and sets up and form a second inclined plane towards a terminal surface of leaf spring, first inclined plane offsets with the outer lane of leaf spring and forms redundant clearance, the second inclined plane offsets with the inner circle of leaf spring and forms redundant clearance.

Through adopting above-mentioned technical scheme, form through the setting of first inclined plane and second inclined plane redundant clearance, provide the space for the inflation of material, this kind of setting mode cost is lower, processing is more convenient. And the cooperation between the first inclined plane, the plate spring and the second inclined plane can provide larger elastic driving space and driving stroke for the plate spring, so that better sealing between the main valve seat and the ball body is realized.

Further setting the following steps: the main valve seat is formed with the second mounting groove that supplies the installation of graphite sealing ring towards the terminal surface of vice disk seat pad, the second mounting groove communicates with each other with the periphery wall of main valve seat, the position that vice disk seat pad corresponds to the second mounting groove is equipped with the extrusion arch that extends into the second mounting groove, works as when the protruding extrusion graphite sealing ring of extrusion, be formed with between vice disk seat pad and the main valve seat and supply the extrusion clearance of the protruding extrusion of extrusion.

Through adopting above-mentioned technical scheme, the elastic component extrudees the graphite sealing ring that is located the second mounting groove through vice disk seat pad drive extrusion arch, realizes inseparabler tight sealed of supporting to this reaches better sealed effect. The extrusion bulge has redundant extrusion stroke for the graphite sealing ring through the formed extrusion gap, so that the graphite sealing ring can be always kept in an extruded sealing state, a better sealing effect is achieved, and the service life is longer.

Further setting the following steps: the setting that extends and outwards is the flaring gradually along the vice valve seat pad direction in a reverse direction in second mounting groove bottom forms a third inclined plane, graphite sealing ring laminates with the third inclined plane mutually.

Through adopting above-mentioned technical scheme, the setting on third inclined plane makes the graphite packing ring can form one and move the side direction atress towards first mounting groove one side when receiving the extrusion to this realizes better sealing between vice valve seat pad and the valve body, reaches better sealed effect.

Further setting the following steps: the periphery wall of main valve seat is formed with annular third mounting groove, the sealing washer install in third mounting groove and protrusion in third mounting groove notch.

Through adopting above-mentioned technical scheme, set the mode that the sealing washer sets up protrusion in third mounting groove notch and realize the inseparabler seal between sealing washer and the valve body.

Further setting the following steps: the internal perisporium of vice valve seat pad is equipped with the drainage ring that extends and cover extrusion clearance towards main valve seat one side.

Through adopting above-mentioned technical scheme, the setting of drainage ring plays the drainage effect to fluid medium, prevents that fluid medium from causing to erode the production that has also avoided vibration and noise to the extrusion clearance to the life of extension valve.

Further setting the following steps: the main valve seat comprises a main body part and a disassembling part detachably mounted on the main body part, and a sealing surface matched with the ball body to form a seal is formed on the disassembling part.

Through adopting above-mentioned technical scheme, when sealed face takes place wearing and tearing and be not enough to guarantee the leakproofness of valve, come to change sealed face through disassembling the dismantlement portion, cost of maintenance is lower like this.

Further setting the following steps: including set up in the location bulge loop of dismantlement portion and set up in main part just supplies the location bulge loop to inlay the sealed positioning ring groove of dress.

Through adopting above-mentioned technical scheme, the accurate installation that the portion of dismantling lies in the main part is realized to the annular location cooperation location bulge loop.

In conclusion, the utility model has the following beneficial effects: the utility model can avoid the high-temperature blocking phenomenon and has better sealing effect, thereby being better suitable for the high-temperature use working condition and having better universality and sealing property.

Drawings

FIG. 1 is a sectional view of the embodiment;

fig. 2 is an enlarged view of a portion a in fig. 1.

In the figure: 1. a valve body; 2. a sphere; 3. a first mounting groove; 4. a main valve seat; 41. a main body portion; 42. a detaching part; 5. a sub valve seat pad; 6. a graphite seal ring; 7. a seal ring; 8. an elastic member; 9. a redundant gap; 10. a first inclined surface; 11. a second inclined surface; 12. a second mounting groove; 13. extruding the bulge; 14. extruding the gap; 15. a third inclined surface; 16. a third mounting groove; 17. a drainage ring; 18. positioning the convex ring; 19. and a positioning ring groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, a valve seat sealing structure includes a valve body 1, a ball 2, a first mounting groove 3 opened in the valve body 1, and a main valve seat 4 disposed in the first mounting groove 3 and cooperating with the ball 2 to form a seal. The main valve seat 4 includes a main body portion 41 and a detachable portion 42, and the detachable portion 42 is formed with a sealing surface that forms a seal with the ball 2. The detachable portion 42 is integrally provided with a positioning protruding ring 18, and the main body portion 41 is provided with a positioning ring groove 19 for the positioning protruding ring 18 to be embedded and sealed. A sealing ring 7 is arranged between the side wall of the first mounting groove 3 and the peripheral wall of the main body part 41, an annular third mounting groove 16 is formed in the peripheral wall of the main body part 41, and the sealing ring 7 is mounted in the third mounting groove 16 and protrudes out of the opening of the third mounting groove 16.

A sub valve seat cushion 5 is provided between the bottom of the first mounting groove 3 and the main body portion 41, an elastic member 8 for driving the sub valve seat cushion 5 to move toward the main body portion 41 is provided between the bottom of the first mounting groove 3 and the sub valve seat cushion 5, and the elastic member 8 is a plate spring. The bottom of the first installation groove 3 extends along the direction back to the auxiliary valve seat cushion 5 and is gradually contracted inwards to form a first inclined surface 10, and the auxiliary valve seat cushion 5 extends along the direction back to the main valve seat 4 and is gradually contracted inwards to form a second inclined surface 11 towards one end surface of the plate spring. The first inclined surface 10 abuts against the outer ring of the plate spring to form a redundant gap 9 therebetween, and the second inclined surface 11 abuts against the inner ring of the plate spring to form a redundant gap 9 therebetween.

A second mounting groove 12 is opened in an end surface of the main body portion 41 facing the sub valve seat pad 5, the second mounting groove 12 communicates with the outer peripheral wall of the main body portion 41, and the graphite seal ring 6 is mounted in the second mounting groove 12. The sub valve seat insert 5 is integrally provided with a pressing protrusion 13 extending into the second mounting groove 12 at a position corresponding to the second mounting groove 12, and when the pressing protrusion 13 presses the graphite seal ring 6, a pressing gap 14 for pressing the pressing protrusion 13 is formed between the sub valve seat insert 5 and the main body portion 41. The bottom of the second installation groove 12 extends along the direction back to the auxiliary valve seat cushion 5 and is gradually flared outwards to form a third inclined surface 15, and the graphite sealing ring 6 is attached to the third inclined surface 15. A drain ring 17 extending toward the main valve seat 4 and covering the pressing gap 14 is fixedly provided on the inner peripheral wall of the sub valve seat pad 5.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a disk seat seal structure, includes valve body (1), spheroid (2), sets up in first mounting groove (3) of valve body (1) and sets up in first mounting groove (3) and cooperation spheroid (2) constitute sealed main valve seat (4), its characterized in that: be equipped with vice disk seat pad (5) between first mounting groove (3) bottom and main valve seat (4), be equipped with graphite packing ring (6) between vice disk seat pad (5), first mounting groove (3) and main valve seat (4) three, be equipped with between first mounting groove (3) and main valve seat (4) sealing washer (7), be equipped with between first mounting groove (3) bottom and vice disk seat pad (5) and drive vice disk seat pad (5) towards main valve seat (4) the elastic component (8) of motion, between elastic component (8) and first mounting groove (3) bottom, all be formed with redundant clearance (9) between elastic component (8) and the vice disk seat pad (5).

2. The valve seat sealing structure according to claim 1, wherein: elastic component (8) include the leaf spring, first mounting groove (3) bottom extends and inwards is the throat gradually along the vice valve seat pad (5) direction of dorsad and sets up and form a first inclined plane (10), vice valve seat pad (5) extend and inwards be the throat gradually and set up and form a second inclined plane (11) along the main valve seat (4) direction of dorsad towards the terminal surface of leaf spring, first inclined plane (10) offset with the outer lane of leaf spring and form redundant clearance (9), second inclined plane (11) offset with the inner circle of leaf spring and form redundant clearance (9).

3. The valve seat sealing structure according to claim 1, wherein: main valve seat (4) are formed with second mounting groove (12) that supply graphite sealing ring (6) to install towards the terminal surface of vice valve seat pad (5), second mounting groove (12) communicate with each other with the periphery wall of main valve seat (4), vice valve seat pad (5) are equipped with extrusion arch (13) that extend into second mounting groove (12) corresponding to the position of second mounting groove (12), work as when extrusion arch (13) extrude graphite sealing ring (6), be formed with between vice valve seat pad (5) and main valve seat (4) and supply extrusion arch (13) extruded extrusion clearance (14).

4. The valve seat sealing structure according to claim 3, wherein: the bottom of the second mounting groove (12) extends along the direction of the back-to-back auxiliary valve seat cushion (5) and is gradually flared outwards to form a third inclined surface (15), and the graphite sealing ring (6) is attached to the third inclined surface (15).

5. The valve seat sealing structure according to claim 1, wherein: the periphery wall of main valve seat (4) is formed with annular third mounting groove (16), sealing washer (7) install in third mounting groove (16) and protrusion in third mounting groove (16) notch.

6. The valve seat sealing structure according to claim 3, wherein: the inner peripheral wall of the auxiliary valve seat cushion (5) is provided with a drainage ring (17) which extends towards one side of the main valve seat (4) and covers the extrusion gap (14).

7. The valve seat sealing structure according to claim 1, wherein: the main valve seat (4) comprises a main body part (41) and a detachable part (42) detachably mounted on the main body part (41), and a sealing surface formed by matching the ball body (2) is formed on the detachable part (42) to form a seal.

8. The valve seat sealing structure according to claim 7, wherein: the detachable positioning device comprises a positioning convex ring (18) arranged on the detachable part (42) and a positioning ring groove (19) which is arranged on the main body part (41) and is used for embedding and sealing the positioning convex ring (18).