CN118757595A - A self-cleaning high-performance safety valve - Google Patents

Abstract

The invention relates to a self-cleaning high-performance safety valve, which comprises an integrally formed valve body and a valve sleeve, wherein a pressure relief opening is formed in the upper side of the valve body, a connecting base is fixedly connected to the lower side of the valve body, a valve seat positioned in an inner cavity of the valve body is integrally formed in the upper end of the connecting base, an air pressure channel is formed in the valve seat and the connecting base, an opening and closing part is movably arranged on the air pressure channel, a valve rod and an elastic supporting part for pushing the valve rod downwards are movably arranged in a sleeve inner cavity of the valve sleeve, the lower end of the valve rod abuts against the opening and closing part, the upper end of the valve rod penetrates out of the valve sleeve and is fixedly connected with an extrusion plate, a supporting seat is arranged on the upper side of the valve sleeve, an air bag is arranged on the supporting seat, the lower end surface of the extrusion plate is used for extruding the air bag, a blowing nozzle component facing to the position between the opening and closing part and the valve seat is arranged in the valve inner cavity, and the blowing nozzle component is communicated with the air bag.

Description

A self-cleaning high-performance safety valve

Technical Field

The invention relates to the technical field of safety valves, in particular to a self-cleaning high-performance safety valve.

Background Art

In the field of industrial production and chemical industry, many pipelines and tanks contain a lot of dust or granular impurities. When the medium pressure in these pipelines and tanks exceeds the force that the internal components of the safety valve can withstand, the opening and closing parts in the safety valve open. In this process, some dust or granular impurities may leave the safety valve through the opening and closing parts and the valve seat. Therefore, some dust or granular impurities may remain and accumulate on the opening and closing parts or valve seats inside the safety valve, thereby affecting the sealing performance between the opening and closing parts and the valve seat.

Most traditional safety valves do not take this problem into full consideration during design. Therefore, during use, once the opening and closing parts are opened and the medium is discharged, the remaining particles will form an obstacle between the opening and closing parts and the valve seat, causing leakage during resealing. In severe cases, it may even cause the safety valve to fail to work properly.

This will also increase the maintenance frequency, because in order to ensure the normal operation of the safety valve, it needs to be cleaned and maintained frequently, increasing the maintenance cost. The long-term accumulation of medium particles will also accelerate the wear of the safety valve components and shorten its service life.

In order to overcome the above technical problems, the present application makes improvements, aiming to automatically clean the area between the opening and closing parts and the valve seat during the closing process of the opening and closing parts, thereby removing the possible residual medium particles, thereby improving the sealing performance of the safety valve, reducing the maintenance frequency, extending the service life, and ensuring the safety of the production process. This design can not only significantly improve the performance of the safety valve, but also adapt to more working conditions containing particulate impurities, providing more reliable safety protection for industrial production.

Summary of the invention

The present invention provides a self-cleaning high-performance safety valve, which can automatically clean the area between the opening and closing member and the valve seat, thereby solving the above-mentioned problems existing in the use process of the prior art.

The technical solution of the present invention is achieved as follows: a self-cleaning high-performance safety valve comprises a valve body and a valve sleeve integrally formed on the upper side of the valve body, the valve body is provided with a valve inner cavity opening downward, the valve sleeve is provided with a sleeve inner cavity communicating with the valve inner cavity, and is characterized in that: a plurality of pressure relief ports penetrating into the valve inner cavity are provided on the upper side of the valve body, a connecting base is fixedly connected to the lower side of the valve body, a valve seat located in the valve inner cavity is integrally formed on the upper end of the connecting base, and an air pressure channel is provided penetrating from top to bottom in the valve seat and the connecting base. The air pressure channel is movably provided with an opening and closing member for forming an abutting seal with the valve seat, the sleeve inner cavity is movably provided with a valve stem and an elastic abutting member for pushing the valve stem downward, the lower end of the valve stem abuts against the opening and closing member, the upper end of the valve stem passes through the valve sleeve and is fixedly connected with an extrusion plate, a support seat is provided on the upper side of the valve sleeve, an air bag is provided on the support seat, the lower end surface of the extrusion plate is used to squeeze the air bag, and a nozzle assembly is provided in the valve inner cavity facing the position between the opening and closing member and the valve seat, and the nozzle assembly is communicated with the air bag.

Preferably, the blowing nozzle assembly includes a blowing ring in an annular shape surrounding the outside of the opening and closing part, the blowing ring is fixed in the valve body, the blowing ring has an annular inner cavity, and the blowing ring is provided with a blowing port inclined from top to bottom toward the position between the opening and closing part and the valve seat on the side facing the extrusion plate, the blowing port is connected to the annular inner cavity and is arranged in an annular shape.

Preferably, the blowing ring is provided with a filter at the blowing port position.

Preferably, a plurality of ventilation pipes are fixedly connected to the upper side of the blowing ring, the ventilation pipes penetrate upwardly out of the upper side of the valve body and are connected to a joint assembly, and a plurality of air supply pipes are fixedly connected to the lower side of the airbag, the air supply pipes pass downwardly through the support seat and are connected to the joint assembly.

Preferably, the joint assembly includes a joint seat fixed on the outer side wall of the valve sleeve, the joint seat is provided with a joint inner cavity connected to the ventilation pipe, the joint seat is provided with a threaded connector corresponding to the gas pipe, and the lower end of the gas pipe is rotatably connected to a connecting sleeve for threaded connection to the threaded connector.

Preferably, a secondary sealing valve seat is connected to the outer side of the valve seat, and when the opening and closing member forms a contact seal with the valve seat, it also forms a contact seal with the secondary sealing valve seat.

Preferably, the contact positions between the opening and closing member and the secondary sealing valve seat and the valve seat are all located within the direction range of the blowing port.

Preferably, the opening and closing member includes an inclined surface facing the secondary sealing valve seat and the valve seat, the valve seat is provided with an inclined contact surface for contacting with the inclined surface, and the secondary sealing valve seat is provided with a secondary inclined contact surface for contacting with the inclined surface.

Preferably, the elastic supporting member includes an outer spring, an inner spring, a lower supporting seat and an upper supporting seat, the upper side of the valve sleeve is threadedly connected with a supporting sleeve that penetrates into the inner cavity of the sleeve, the upper end of the valve stem movably passes through the supporting sleeve, the upper supporting seat is movably arranged on the valve stem and located on the lower side of the supporting sleeve, the lower supporting seat is fixed on the valve stem and located on the upper side of the opening and closing member, the upper and lower ends of the outer spring and the inner spring are both supported on the upper supporting seat and the lower supporting seat, and the outer spring sleeve is arranged on the outside of the inner spring.

Preferably, a corrugated sleeve is provided between the upper supporting seat and the lower supporting seat, and the corrugated sleeve is used to cover the outer spring and the inner spring inside.

In summary, the beneficial effects of the present invention are:

1. When the opening and closing part opens upward, the opening and closing part pushes the valve stem upward, and the valve stem drives the extrusion plate upward. At this time, the airbag that was originally in an extruded state expands due to the upward movement of the extrusion plate. When the opening and closing part falls downward, the elastic support member pushes the valve stem downward, and the extrusion plate squeezes the airbag downward. Therefore, the blowing nozzle assembly facing the position between the opening and closing part and the valve seat is continuously purged in the process of the opening and closing part approaching the valve seat. In summary, the present invention can automatically purge between the opening and closing part and the valve seat during the closing process of the opening and closing part, and the residual particles between the opening and closing part and the valve seat can be effectively removed through the purge mechanism to ensure close contact between the two, thereby significantly improving the sealing performance of the safety valve. The risk of leakage caused by the accumulation of particles is reduced, and the overall safety of the system is enhanced. In addition, self-cleaning reduces the wear of particles on the opening and closing part and the valve seat, and extends the service life of the safety valve. The maintenance frequency and cost are reduced, and the need to replace parts due to wear is reduced.

2. The blowing nozzle assembly of the present invention includes a blowing ring in an annular shape surrounding the opening and closing part. The annular blowing port on the blowing ring can blow the area between the opening and closing part and the valve seat in all directions, and the setting of the filter on the blowing port can effectively prevent most of the dust or particulate impurities from entering the annular inner cavity through the blowing port to form accumulation and blockage.

3. The present invention also has a secondary sealing valve seat connected to the outside of the valve seat. When the opening and closing member forms a contact seal with the valve seat, it also forms a contact seal with the secondary sealing valve seat. The double sealing structure improves the sealing performance of the present invention.

4. The opening and closing parts are sealed by the inclined surface and the inclined contact surface on the valve seat and the auxiliary inclined contact surface on the auxiliary sealing valve seat. This inclined structure can also prevent dust or granular impurities from accumulating on the surface that needs to be contacted and sealed.

5. The double spring structure of the outer spring and the inner spring improves the sealing performance of the present invention, avoiding the situation that a single spring cannot push the opening and closing part to be pressed against the valve seat due to the setting of the airbag, and the setting of the bellows sleeve can well protect the outer spring and the inner spring, preventing the outer spring and the inner spring from being severely eroded in a harsh use environment, thereby increasing the service life.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

FIG1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is a top view of the present invention;

Fig. 3 is a schematic diagram of the cross-sectional structure of Fig. 2 taken along the A-A direction;

FIG4 is a schematic diagram of the three-dimensional structure of FIG3 ;

Fig. 5 is a schematic diagram of the cross-sectional structure of Fig. 2 taken along the B-B direction;

FIG6 is a partial enlarged schematic diagram of point A in FIG5 ;

FIG7 is a schematic diagram of the structure in which the connection base and the auxiliary sealing valve seat are partially exploded in the present invention;

FIG8 is a schematic diagram of the structure of the opening and closing member, the screw rod, the elastic supporting member and the supporting sleeve in the present invention;

FIG. 9 is a schematic diagram of the structure of FIG. 8 after the corrugated sleeve is removed.

In the figure: 11, valve body; 111, valve inner cavity; 112, pressure relief port; 12, valve sleeve; 121, sleeve inner cavity; 21, connecting base; 22, valve seat; 221, inclined contact surface; 23, air pressure channel; 30, opening and closing member; 31, guide column; 32, plug hole; 33, inclined surface; 41, valve stem; 42, extrusion plate; 43, screw; 51, support seat; 52, internal thread sleeve; 61, air bag; 62, air pipe; 63, connecting sleeve; 71, blowing ring; 711, annular inner cavity; 712, air port; 72, filter screen; 73, ventilation duct; 74, joint seat; 741, joint cavity; 742, threaded connector; 81, auxiliary sealing valve seat; 811, auxiliary inclined contact surface; 82, rotating sleeve; 821, slot; 83, limit screw; 91, outer spring; 92, inner spring; 93, lower abutment seat; 94, upper abutment seat; 95, abutment sleeve; 96, corrugated sleeve; 97, first gasket; 971, first screw; 98, second gasket; 981, second screw.

DETAILED DESCRIPTION

The following will be combined with Figures 1-9 of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Example:

As shown in FIGS. 1 to 9, the present invention discloses a self-cleaning high-performance safety valve, comprising a valve body 11, a valve sleeve 12 integrally formed on the upper side of the valve body 11, a valve inner cavity 111 with an opening facing downward is provided in the valve body 11, and a sleeve inner cavity 121 communicating with the valve inner cavity 111 is provided in the valve sleeve 12, a plurality of pressure relief ports 112 penetrating into the valve inner cavity 111 are provided on the upper side of the valve body 11, and four pressure relief ports 112 are equidistantly arranged on the circumference, and a connecting base 21 is fixedly connected to the lower side of the valve body 11 The upper end of the connecting base 21 is integrally formed with a valve seat 22 located in the valve inner cavity 111, and a gas pressure channel 23 is opened from top to bottom in the valve seat 22 and the connecting base 21. An opening and closing member 30 for forming a contact seal with the valve seat 22 is movably arranged on the gas pressure channel 23. As shown in FIG8, the opening and closing member 30 also includes a guide column 31 located in the gas pressure channel 23. The guide column 31 is in a cross shape. The guide column 31 is slidably matched with the gas pressure channel 23 to keep the opening and closing member 30 moving up and down. In addition, a valve stem 41 and an elastic abutment member for pushing the valve stem 41 downward are movably arranged in the sleeve inner cavity 121, and the lower end of the valve stem 41 abuts against the opening and closing member 30. Specifically, a plug hole 32 for inserting the valve stem 41 is opened on the opening and closing member 30, and the lower end of the valve stem 41 is inserted into the plug hole 32 and abuts against the bottom of the plug hole 32. In addition, the upper end of the valve stem 41 passes through the valve sleeve 12 and is fixedly connected to the extrusion plate 42 through a screw 43, and a support seat 51 is provided on the upper side of the valve sleeve 12. An airbag 61 is fixedly connected to the seat 51, and the lower end surface of the extrusion plate 42 is used to extrude the airbag 61. When the opening and closing member 30 and the valve seat 22 form a contact seal, the airbag 61 is in an extruded state. In addition, the upper side of the airbag 61 is fixedly connected to the extrusion plate 42, so that the airbag 61 can be quickly driven to expand during the upward movement of the extrusion plate 42. Then, a nozzle assembly is provided in the valve inner cavity 111, facing the position between the opening and closing member 30 and the valve seat 22, and the nozzle assembly is connected to the airbag 61.

Working principle of the present invention: When the medium pressure in the pipeline and tank installed by the present invention exceeds the force that the internal components of the safety valve can withstand, when the opening and closing member 30 is driven to open upward, the opening and closing member 30 pushes the valve stem 41 upward, and the valve stem 41 drives the extrusion plate 42 upward. At this time, the air bag 61, which was originally in an extruded state, expands due to the upward movement of the extrusion plate 42, and the pressure relief is completed. The elastic support member pushes the valve stem 41 and the opening and closing member 30 downward, and the extrusion plate 42 squeezes the air bag 61 downward. Therefore, the blowing nozzle assembly facing the position between the opening and closing member 30 and the valve seat 22 continuously purges the opening and closing member 30 and the valve seat 22 during the process of the opening and closing member 30 approaching the valve seat 22 downward. In summary, the present invention can automatically purge the opening and closing member 30 and the valve seat 22 during the closing process of the opening and closing member 30, and the residual particles between the opening and closing member 30 and the valve seat 22 can be effectively removed through the purge mechanism to ensure close contact between the two, thereby significantly improving the sealing performance of the safety valve. The risk of leakage caused by the accumulation of particles is reduced, and the overall safety of the system is enhanced. In addition, self-cleaning reduces the wear of particles on the opening and closing member 30 and the valve seat 22, and prolongs the service life of the safety valve. The maintenance frequency and cost are reduced, and the situation of replacing parts due to wear is reduced, so that the present invention only needs occasional maintenance to clean the dust and particle impurities in the internal corners.

Specifically, the blowing nozzle assembly includes a blowing ring 71 in an annular shape surrounding the opening and closing member 30, the blowing ring 71 is fixed in the valve body 11, and has an annular inner cavity 711 in the blowing ring 71. The blowing ring 71 is provided with a blowing port 712 on the side facing the extrusion plate 42, which is inclined from top to bottom toward the position between the opening and closing member 30 and the valve seat 22. This is beneficial for blowing particulate impurities between the opening and closing member 30 and the valve seat 22 toward the air pressure channel 23, and the blowing port 712 is connected to the annular inner cavity 711 and is arranged in an annular shape. The annular blowing port 712 can blow the area between the opening and closing member 30 and the valve seat 22 in all directions.

Furthermore, the blowing ring 71 is provided with a filter 72 at the blowing port 712. The setting of the filter 72 can effectively prevent some dust or particulate impurities from entering the annular inner cavity 711 through the blowing port 712 and forming accumulation and blockage during long-term use.

The connection method of the nozzle assembly and the air bag 61 is specifically as follows: four ventilation pipes 73 equidistantly distributed in a circle are fixedly connected to the upper side of the blowing ring 71, the ventilation pipes 73 penetrate upwardly out of the upper side of the valve body 11 and are connected to a joint assembly, wherein the ventilation pipes 73 are staggered between the pressure relief ports 112, and in addition, two air pipes 62 are fixedly connected to the lower side of the air bag 61, the air pipes 62 pass downwardly through the support seat 51 and are connected to the joint assembly, and the joint assembly specifically includes a joint seat 74 fixed on the outer side wall of the valve sleeve 12, a joint inner cavity 741 connected to the ventilation pipe 73 is provided in the joint seat 74, a threaded connector 742 is provided on the joint seat 74 corresponding to the air pipe 62, and a connecting sleeve 63 for threaded connection to the threaded connector 742 is rotatably connected to the lower end of the air pipe 62. It should be noted that the ventilation pipe 73, the joint seat 74 and the connecting sleeve 63 are all made of metal, while the air delivery pipe 62 is made of rubber. This structure allows the air bag 61 and the mouthpiece assembly to be disassembled. The lower end of the support seat 51 is integrally formed with an internal thread sleeve 52, which is detachably threaded to the upper end of the outer wall of the valve sleeve 12.

In the present invention, the outer side of the valve seat 22 is connected to a secondary sealing valve seat 81. When the opening and closing member 30 forms a contact seal with the valve seat 22, it also forms a contact seal with the secondary sealing valve seat 81. It should be noted that the secondary sealing valve seat 81 is one of rubber, polyurethane, and thermoplastic elastomer, and can undergo a certain deformation when subjected to an external force. In this way, the secondary sealing valve seat 81 slightly contacts the opening and closing member 30 before the valve seat 22 contacts the opening and closing member 30, and does not prevent the opening and closing member 30 from continuing to contact the valve seat 22 downward to form a seal, which can reduce the accuracy requirement for the setting position of the secondary sealing valve seat 81. The double sealing structure improves the sealing performance of the present invention. In addition, a rotating sleeve 82 is fixedly connected to the lower end of the auxiliary sealing valve seat 81, and the rotating sleeve 82 is threadedly connected to the outer wall of the valve seat 22, that is, the upper and lower positions of the auxiliary sealing valve seat 81 can be adjusted, and a plurality of grooves 821 are also provided on the outer side of the rotating sleeve 82, and a limiting screw 83 is threadedly connected on the inner wall of the valve body 11. The limiting screw 83 is used to be inserted into the groove 821 after the auxiliary sealing valve seat 81 is adjusted, so that the rotating sleeve 82 can no longer rotate.

Among them, the contact positions between the opening and closing member 30 and the secondary sealing valve seat 81 and the valve seat 22 are all located within the direction range of the blowing port 712, that is, the blowing port 712 can simultaneously blow the contact positions between the opening and closing member 30 and the secondary sealing valve seat 81 and the valve seat 22.

In the present invention, the opening and closing member 30 includes an inclined surface 33 facing the secondary sealing valve seat 81 and the valve seat 22, and the valve seat 22 is provided with an inclined contact surface 221 for contacting with the inclined surface 33, and the secondary sealing valve seat 81 is provided with a secondary inclined contact surface 811 for contacting with the inclined surface 33. The opening and closing member 30 contacts and seals with the inclined contact surface 221 on the valve seat 22 and the secondary inclined contact surface 811 on the secondary sealing valve seat 81 through the inclined surface 33. This inclined structure can also prevent dust or particulate impurities from accumulating on the surface that needs contact sealing.

In the present invention, the elastic abutment member includes an outer spring 91, an inner spring 92, a lower abutment seat 93 and an upper abutment seat 94. A abutment sleeve 95 penetrating into the inner cavity 121 of the sleeve is threadedly connected to the upper side of the valve sleeve 12. After the inner threaded sleeve 52 is disassembled, the abutment sleeve 95 can be adjusted up and down. The upper end of the valve stem 41 movably passes through the abutment sleeve 95. The upper abutment seat 94 is movably arranged on the valve stem 41 and is located on the lower side of the abutment sleeve 95. The lower abutment seat 93 is fixed on the valve stem 41 and is located on the upper side of the opening and closing member 30. The outer spring 91 and the inner spring 92 are connected to each other. The upper and lower ends are both abutted against the upper abutment seat 94 and the lower abutment seat 93, and the outer spring 91 is sleeved on the outside of the inner spring 92. The double spring setting of the outer spring 91 and the inner spring 92 improves the sealing performance of the present invention, and avoids the situation that the single spring cannot push the opening and closing member 30 to be pressed against the valve seat 22 due to the setting of the airbag 61. Of course, the pressing force applied by the outer spring 91 and the inner spring 92 on the opening and closing member 30 should be specifically set according to the actual application, and the medium pressure in the pipeline and the tank body under which the opening and closing member 30 needs to be opened.

Furthermore, in order to protect the outer spring 91 and the inner spring 92, a corrugated sleeve 96 is provided between the upper abutting seat 94 and the lower abutting seat 93. The upper end of the corrugated sleeve 96 is pressed against the upper abutting seat 94 by a first gasket 97, and the first gasket 97 is fixed to the upper abutting seat 94 by a first screw 971. Similarly, the lower end of the corrugated sleeve 96 is also pressed against the lower abutting seat 93 by a second gasket 98, and the second gasket 98 is fixed to the lower abutting seat 93 by a second screw 981. The corrugated sleeve 96 is used to cover the outer spring 91 and the inner spring 92 inside, so as to prevent the outer spring 91 and the inner spring 92 from being seriously eroded in a relatively harsh use environment and to increase the service life.

It should also be pointed out that the terms used in the present invention, such as "front", "rear", "vertical", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A self-cleaning high-performance safety valve, comprising a valve body, a valve sleeve integrally formed on the upper side of the valve body, the valve body is provided with a valve inner cavity opening downward, the valve sleeve is provided with a sleeve inner cavity communicating with the valve inner cavity, characterized in that: the upper side of the valve body is provided with a plurality of pressure relief ports penetrating into the valve inner cavity, the lower side of the valve body is fixedly connected with a connecting base, the upper end of the connecting base is integrally formed with a valve seat located in the valve inner cavity, an air pressure channel is provided penetrating from top to bottom in the valve seat and the connecting base, the air pressure channel An opening and closing member for forming an abutting seal with a valve seat is movably provided on the upper portion; a valve stem and an elastic abutting member for pushing the valve stem downward are movably provided in the inner cavity of the sleeve; the lower end of the valve stem abuts against the opening and closing member; the upper end of the valve stem passes through the valve sleeve and is fixedly connected with an extrusion plate; a support seat is provided on the upper side of the valve sleeve, an air bag is provided on the support seat, the lower end surface of the extrusion plate is used to extrude the air bag, a nozzle assembly is provided in the inner cavity of the valve facing the position between the opening and closing member and the valve seat, and the nozzle assembly is communicated with the air bag. 2. A self-cleaning high-performance safety valve according to claim 1, characterized in that: the blowing nozzle assembly includes a blowing ring in an annular shape surrounding the outside of the opening and closing part, the blowing ring is fixed in the valve body, the blowing ring has an annular inner cavity, and the blowing ring is provided with a blowing port inclined from top to bottom toward the position between the opening and closing part and the valve seat on the side facing the extrusion plate, the blowing port is connected to the annular inner cavity and is arranged in an annular shape. 3. A self-cleaning high-performance safety valve according to claim 2, characterized in that: the blowing ring is provided with a filter at the blowing port position. 4. A self-cleaning high-performance safety valve according to claim 2, characterized in that: a plurality of ventilation pipes are fixedly connected to the upper side of the blowing ring, the ventilation pipes penetrate upward from the upper side of the valve body and are connected to a joint assembly, and a plurality of air supply pipes are fixedly connected to the lower side of the airbag, the air supply pipes pass downward through the support seat and are connected to the joint assembly. 5. A self-cleaning high-performance safety valve according to claim 4, characterized in that: the joint assembly includes a joint seat fixed on the outer side wall of the valve sleeve, the joint seat is provided with a joint inner cavity connected to the ventilation pipe, the joint seat is provided with a threaded connector corresponding to the gas pipe, and the lower end of the gas pipe is rotatably connected to a connecting sleeve for threaded connection to the threaded connector. 6. A self-cleaning high-performance safety valve according to claim 1, characterized in that: a secondary sealing valve seat is connected to the outer side of the valve seat, and when the opening and closing member forms a contact seal with the valve seat, it also forms a contact seal with the secondary sealing valve seat. 7. A self-cleaning high-performance safety valve according to claim 6, characterized in that the contact positions between the opening and closing member and the secondary sealing valve seat and the valve seat are all located within the direction range of the blowing port. 8. A self-cleaning high-performance safety valve according to claim 6, characterized in that: the opening and closing member includes an inclined surface facing the auxiliary sealing valve seat and the valve seat, the valve seat is provided with an inclined contact surface for contacting with the inclined surface, and the auxiliary sealing valve seat is provided with a secondary inclined contact surface for contacting with the inclined surface. 9. A self-cleaning high-performance safety valve according to claim 1, characterized in that: the elastic supporting part includes an outer spring, an inner spring, a lower supporting seat and an upper supporting seat, the upper side of the valve sleeve is threadedly connected with a supporting sleeve that penetrates into the inner cavity of the sleeve, the upper end of the valve stem movably passes through the supporting sleeve, the upper supporting seat is movably arranged on the valve stem and is located on the lower side of the supporting sleeve, the lower supporting seat is fixed on the valve stem and is located on the upper side of the opening and closing member, the upper and lower ends of the outer spring and the inner spring are both abutted on the upper supporting seat and the lower supporting seat, and the outer spring sleeve is arranged on the outside of the inner spring. 10. A self-cleaning high-performance safety valve according to claim 9, characterized in that a bellows sleeve is provided between the upper abutment seat and the lower abutment seat, and the bellows sleeve is used to cover the outer spring and the inner spring.