CN211693729U

CN211693729U - Multi-stage sealed high-pressure air inlet and outlet valve

Info

Publication number: CN211693729U
Application number: CN201922325073.9U
Authority: CN
Inventors: 詹小华; 彭阳超
Original assignee: WUHAN DAYU VALVE CO Ltd
Current assignee: WUHAN DAYU VALVE CO Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-10-16
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a multistage sealed high pressure air inlet and outlet valve, last valve body and lower valve body including fixed connection, go up valve body upper end and valve gap fixed connection, on the inner wall of going up the valve body respectively fixedly connected with go up disk seat, lower disk seat and elastic sealing circle, lower valve body passes through the spacing cooperation of uide bushing and floater, and the floater is successively sealed with elastic sealing circle, last disk seat and lower disk seat butt respectively at the come-up in-process. When the valve is positioned in the range of different pressure grades, the valve is in butt seal with the floating ball through different sealing parts, and when the valve is positioned in a high-pressure range, the floating ball and the upper valve seat are squeezed and deformed to be in butt seal with the lower valve seat, so that the combination of hard seal and spherical seal ensures that the high-pressure sealing effect is good; in addition, the upper valve seat or the lower valve seat is not required to be pressed when the sealing effect is not achieved, the elastic sealing ring can be prevented from being damaged due to further extrusion deformation, and the service life of the sealing structure is prolonged.

Description

Multi-stage sealed high-pressure air inlet and outlet valve

Technical Field

The utility model relates to a valve seal technical field specifically indicates a multistage sealed high pressure inlet and outlet valve.

Background

The air inlet and outlet valve and the pressure micro-exhaust valve are combined into a composite air inlet and outlet valve, commonly called an air valve. When the pipeline is filled with water, the air inlet and outlet valve can quickly discharge air in the pipeline, so that the pipeline is quickly filled with water; when negative pressure is generated in the pipeline, air can be rapidly supplemented, and the negative pressure generated in the pipeline is avoided. A10 MPa air inlet and outlet valve belongs to the field of high-pressure pipeline water delivery, and is a special air inlet and outlet device for a long-distance water supply high-pressure pipeline. The 10MPa air inlet and outlet valve adopts a floating ball type structure in a sealing mode, the nominal pressure of the air inlet and outlet valve commonly used in China is below 4.0MPa generally at present, and the requirement of high-pressure pipeline water delivery cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the deficiencies of the prior art, providing a high pressure inlet and outlet valve which realizes multi-stage sealing and has good high pressure sealing effect for various pressure ranges.

In order to achieve the above object, the utility model provides a multistage sealed high pressure inlet and outlet valve, last valve body and lower valve body including fixed connection, go up valve body upper end and valve gap fixed connection, its characterized in that: the inner wall of the upper valve body is fixedly connected with an upper valve seat, a lower valve seat and an elastic sealing ring respectively, the lower valve body is in limit fit with the floating ball through the guide sleeve, and the floating ball is in butt seal with the elastic sealing ring, the upper valve seat and the lower valve seat sequentially in the floating process.

Further, the uide bushing includes hollow sleeve, sleeve upper end fixedly connected with bracket, the bracket passes through linking bridge and the inner wall fixed connection of lower valve body.

Furthermore, the lower end of the floating ball is fixedly provided with a guide post inserted into the sleeve, and the lower end face of the floating ball is in limit abutting connection with the bracket.

Furthermore, the elastic sealing ring is positioned between the upper valve seat and the lower valve seat, and the end face of the inner ring of the elastic sealing ring is provided with a continuous sealing bulge protruding out of the end face of the inner side of the upper valve seat.

Furthermore, the inner walls of the upper valve seat and the lower valve seat are both spherical surfaces, the spherical curvature of the upper valve seat is equal to that of the floating ball, and the spherical curvature of the lower valve seat is smaller than that of the floating ball; when the floating ball is contacted with the upper valve seat but not extruded, a gap is formed between the lower valve seat and the floating ball.

Furthermore, the upper end of the upper valve body is provided with an exhaust port, and the lower end of the lower valve body is provided with a water inlet.

Further, the lower end face of the valve cover is an arc concave face, a flow guide block is arranged at the center of the arc concave face, a plurality of connecting bosses are further arranged on the arc concave face, and the connecting bosses are fixedly connected with the end face of the upper valve body.

The utility model has the advantages that: realize multistage sealed, and high-pressure seal is effectual. The upper valve seat, the lower valve seat, the elastic sealing ring and the floating ball are arranged in the inner cavity of the upper valve body and are sequentially abutted and sealed, so that different sealing parts are adopted for sealing with the floating ball according to different pressure ranges, when the valve is in a high-pressure range, the floating ball is abutted with the lower valve seat after being extruded and deformed with the upper valve seat, and the combination of hard sealing and spherical surface sealing ensures that the high-pressure sealing effect is good; in addition, the upper valve seat or the lower valve seat is not required to be pressed when the sealing function is not performed, the service life is prolonged, and the high-pressure sealing performance is ensured.

Drawings

Fig. 1 is a main sectional view of the structure of the present invention.

FIG. 2 is a schematic view of the ball sealingly engaging the seat.

Fig. 3 is a view taken along direction a in fig. 1.

The components in the figures are numbered as follows: the valve comprises an upper valve body 101, a lower valve body 102, a water inlet 103, an exhaust port 104, a valve cover 2, a connecting boss 201, a flow guide block 202, a floating ball 3, a guide column 301, a sleeve 401, a bracket 402, a connecting support 403, an upper valve seat 501, a lower valve seat 502, an elastic sealing ring 6, a sealing protrusion 601 and a valve seat sealing ring 7.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the scope of the present invention.

As shown in FIGS. 1-3, a multistage sealed high pressure air inlet and outlet valve comprises an upper valve body 101 and a lower valve body 102 which are fixedly connected, wherein the upper end of the upper valve body 101 is fixedly connected with a valve cover 2, and the multistage sealed high pressure air inlet and outlet valve is characterized in that: the inner wall of the upper valve body 101 is fixedly connected with an upper valve seat 501, a lower valve seat 502 and an elastic sealing ring 6 respectively, valve seat sealing rings 7 are arranged between the upper valve seat 501, the lower valve seat 502 and the upper valve body 101, the lower valve body 102 is in limit fit with a floating ball 3 through a guide sleeve, and the floating ball 3 is in butt joint with the elastic sealing ring 6, the upper valve seat 501 and the lower valve seat 502 in sequence and is sealed in the floating process. Therefore, when the valve is positioned in the range of different pressure grades, the valve is in butt seal with the floating ball through different sealing parts, and when the valve is positioned in a high-pressure range, the floating ball and the upper valve seat are squeezed and deformed to be in butt seal with the lower valve seat, so that the combination of hard seal and spherical seal ensures that the high-pressure sealing effect is good; in addition, the upper valve seat or the lower valve seat is not required to be pressed when the sealing function is not performed, the service life is prolonged, and the high-pressure sealing performance is ensured.

In the above technical solution, the guide sleeve includes a hollow sleeve 401, the upper end of the sleeve 401 is fixedly connected with a bracket 402, and the bracket 402 is fixedly connected with the inner wall of the lower valve body 102 through a connecting bracket 403; the lower end of the floating ball 3 is fixedly provided with a guide post 301 inserted into the sleeve 401, and the lower end surface of the floating ball 3 is in limit abutting contact with the bracket 402. Therefore, when the high-pressure air inlet and outlet valve is filled with air, the floating ball is supported by the bracket due to gravity, when the high-pressure air inlet and outlet valve is filled with water, the floating ball is lifted due to the fact that buoyancy is larger than gravity, and the floating ball is limited by the limiting matching of the guide post and the sleeve to only vertically lift.

In the above technical solution, the elastic sealing ring 6 is located between the upper valve seat 501 and the lower valve seat 502, and a continuous sealing protrusion 601 protruding from the inner end surface of the upper valve seat 501 is disposed on the inner end surface of the inner ring. Therefore, when the pressure of the high-pressure air inlet and outlet valve is less than 0.05MPa, the floating ball is only abutted to the elastic sealing ring, the continuous sealing bulge reduces the contact area of the floating ball and the inner ring of the elastic sealing ring, the sealing specific pressure is increased, and meanwhile, the sealing bulge deforms due to extrusion, so that the sealing effect is improved.

In the above technical solution, the inner walls of the upper valve seat 501 and the lower valve seat 502 are both spherical surfaces, the spherical curvature of the upper valve seat 501 is equal to that of the floating ball 3, and the spherical curvature of the lower valve seat 502 is smaller than that of the floating ball 3; when the float ball 3 contacts the upper valve seat 501 but is not pressed, a gap exists between the lower valve seat 502 and the float ball 3. Thus, when the pressure of the high-pressure air inlet and outlet valve is within the medium-pressure range of 0.05MPa to 4MPa, the floating ball further compresses the elastic sealing ring and abuts against the spherical surface of the upper valve seat but does not abut against the lower valve seat, and the hard seal is arranged between the upper valve seat and the floating ball, so that the deformation caused by the extrusion of the floating ball can be resisted, the sealing effect is achieved, the damage caused by the further extrusion deformation of the elastic sealing ring is avoided, and the service life of the elastic sealing ring is prolonged; when the pressure of high pressure inlet and outlet valve lies in high pressure range 4MPa ~ 15MPa, go up and produce small deformation because of the extrusion between valve seat and the floater, the floater leans on the camber of upper valve seat and lower valve seat one side to diminish, and the floater laminates completely and the butt with the sphere of lower valve seat this moment, and lower valve seat plays the main bearing effect when high-pressure seal, has avoided being further extruded of elastic seal circle to warp and the destruction that leads to.

In the above technical solution, the upper end of the upper valve body 101 is provided with an exhaust port 104, and the lower end of the lower valve body 102 is provided with a water inlet 103; the lower end face of the valve cover 2 is an arc concave face, the center of the valve cover is provided with a flow guide block 202, air flows out of the valve cover 2 along the arc concave face of the valve cover 2 after encountering the flow guide block 202, the arc concave face is also provided with a plurality of connecting bosses 201, and the connecting bosses 201 are fixedly connected with the end face of the upper valve body 101. Therefore, when water enters from a water pipe by-passed by the high-pressure air inlet and outlet valve, air in the valve can be discharged out of the valve body from the air outlet 104, then when water enters the valve body, the floating ball vertically rises due to the buoyancy effect and is sequentially abutted against the elastic sealing ring, the upper valve seat and the lower valve seat to play a sealing role, and the water is completely blocked; when water in the water pipe is emptied, the floating ball vertically descends due to the action of gravity, air enters the valve body from the air outlet and fills the water pipe, and the water pipe and the valve body are prevented from forming negative pressure to damage a pipeline and a valve.

Claims

1. The utility model provides a multistage sealed high pressure air inlet and outlet valve, includes fixed connection's last valve body (101) and lower valve body (102), go up valve body (101) upper end and valve gap (2) fixed connection, its characterized in that: the inner wall of the upper valve body (101) is fixedly connected with an upper valve seat (501), a lower valve seat (502) and an elastic sealing ring (6) respectively, the lower valve body (102) is in limit fit with the floating ball (3) through a guide sleeve, and the floating ball (3) is sequentially abutted and sealed with the elastic sealing ring (6), the upper valve seat (501) and the lower valve seat (502) in the upward floating process respectively.

2. The multi-stage sealed high pressure inlet and exhaust valve according to claim 1, wherein: the guide sleeve comprises a hollow sleeve (401), a bracket (402) is fixedly connected to the upper end of the sleeve (401), and the bracket (402) is fixedly connected with the inner wall of the lower valve body (102) through a connecting support (403).

3. The multi-stage sealed high pressure inlet and exhaust valve according to claim 2, wherein: the lower end of the floating ball (3) is fixedly provided with a guide post (301) inserted into the sleeve (401), and the lower end face of the floating ball (3) is in limit abutting joint with the bracket (402).

4. The multi-stage sealed high pressure inlet and exhaust valve according to claim 1, wherein: the elastic sealing ring (6) is positioned between the upper valve seat (501) and the lower valve seat (502), and the end surface of the inner ring of the elastic sealing ring is provided with a continuous sealing bulge (601) protruding out of the end surface of the inner side of the upper valve seat (501).

5. The multi-stage sealed high pressure inlet and exhaust valve according to claim 4, wherein: the inner walls of the upper valve seat (501) and the lower valve seat (502) are both spherical surfaces, the spherical curvature of the upper valve seat (501) is equal to that of the floating ball (3), and the spherical curvature of the lower valve seat (502) is smaller than that of the floating ball (3); when the floating ball (3) is in contact with the upper valve seat (501) but is not extruded, a gap exists between the lower valve seat (502) and the floating ball (3).

6. The multi-stage sealed high pressure inlet and exhaust valve according to claim 1, wherein: an exhaust port (104) is formed in the upper end of the upper valve body (101), and a water inlet (103) is formed in the lower end of the lower valve body (102).

7. The multi-stage sealed high pressure inlet and exhaust valve according to claim 1, wherein: the lower end face of the valve cover (2) is an arc concave face, a flow guide block (202) is arranged at the center of the arc concave face, a plurality of connecting bosses (201) are further arranged on the arc concave face, and the connecting bosses (201) are fixedly connected with the end face of the upper valve body (101).