CN111795173B

CN111795173B - Silicone-proof stainless steel ball valve

Info

Publication number: CN111795173B
Application number: CN202010682740.3A
Authority: CN
Inventors: 林小彬; 陈玉燕
Original assignee: Shanghai Guanlong Valve Machinery Co ltd
Current assignee: Shanghai Guanlong Valve Machinery Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2022-04-01
Anticipated expiration: 2040-07-15
Also published as: CN111795173A

Abstract

The invention discloses a silicone-resistant stainless steel ball valve, which belongs to the technical field of ball valves and comprises an adjusting bolt, a valve rod, a valve seat, a valve body and a double-layer valve core; the improved double-layer valve is characterized in that a valve rod is arranged below the adjusting bolt, the valve rod penetrates through the valve seat, an extrusion assembly is arranged inside the valve seat, a valve body is arranged below the valve seat, sliding assemblies are arranged inside two ends of the valve body, and a double-layer valve core is arranged in the valve body. The invention is scientific and reasonable, safe and convenient to use, can be used as a switch valve, and can also adjust the flow rate of a medium in the ball valve; the adjusting method is simple, convenient and quick, and saves labor and time; the valve core is arranged into double layers, so that the phenomenon that the valve core is damaged after being impacted by a medium for a long time is effectively avoided, the service life of the double-layer valve core is prolonged, the tightness of the device is improved, and the possibility of medium seepage and rusting of the ball valve is reduced; the sliding assembly changes the traditional installation method of a conventional wrench, the pipelines at two ends can be installed only by rotating, the installation method is simple, and the time of an installation master is saved.

Description

Silicone-proof stainless steel ball valve

Technical Field

The invention relates to the technical field of ball valves, in particular to a silicone-resistant stainless steel ball valve.

Background

Ball valves, i.e. valves with a ball as the closure. Ball valves are the earliest in the 20 th century and the 50 th century, and in countries with developed western industries, the use of ball valves is in the process of continuously rising year by year, and the ball valve technology is greatly improved along with the rapid development of science and technology. In China, ball valves are widely introduced in industries such as petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, steel and the like, and play a significant role in national economy. The ball valve is mainly used for cutting off, distributing and changing the flow direction of a medium in a pipeline, can be closed tightly only by rotating 90 degrees and a small rotating moment, and is most suitable for being used as a switch and a cut-off valve.

Most of the existing ball valves can only be used as switches, the flow rate of a medium passing through the ball valves cannot be adjusted, and the functions are single. Secondly, the case is single-layer construction among the current ball valve, receives the impact of medium for a long time after, easily damages for sealing performance greatly reduced easily leads to oozing of medium and the rust of ball valve itself, and it is also comparatively inconvenient to change the case repeatedly. Finally, the two ends of the existing ball valve need to rotate the pipeline respectively, so that the pipelines are successfully installed at the two ends of the ball valve, the use is complicated, the consumed time and labor are more, the situation that the sealing is not tight during installation can be caused, and the use of the ball valve after installation is influenced. Therefore, a silicone-resistant stainless steel ball valve is required to solve the above problems.

Disclosure of Invention

The invention aims to provide a silicone-proof stainless steel ball valve to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the silicone-resistant stainless steel ball valve comprises an adjusting bolt, a valve rod, a valve seat, a valve body and a double-layer valve core; the valve is characterized in that a valve rod is arranged below the adjusting bolt, the valve rod penetrates through the valve seat, a valve body is arranged below the valve seat, a double-layer valve core is arranged in the valve body, and the lower portion of the valve rod is movably connected with the double-layer valve core.

The adjusting bolt is favorable for opening or closing the ball valve, the valve rod is favorable for driving the rotating direction of the double-layer valve core, the valve seat is favorable for sealing the whole ball valve, and the valve body is used for accommodating parts such as the double-layer valve core. The double-layer valve core is beneficial to reducing the impact force of water flow flowing through the valve body and regulating the speed of the water flow.

Preferably, an extrusion assembly is arranged inside the valve seat and comprises a sliding rod, a sliding block, an extrusion plate, a screw and a main air bag; the main air bag is fixed inside the valve seat; sliding rods are arranged on two sides of the main airbag and are connected with the valve seat up and down; the sliding rods are sleeved with sliding blocks, and extrusion plates are connected between the sliding blocks; the two sides of the extrusion plate are penetrated with screws, the contact surface of the extrusion plate and the screws is provided with threads, and the threads are matched with the screws; the rotary disc type valve is characterized in that a rotary block is arranged above the screw rod and is rotatably connected with the upper portion of the valve seat, a rocking disc is fixed above the rotary block, and a rotary disc is fixed above the rocking disc.

The compression assembly facilitates compression of the primary airbag and thereby ballooning of the secondary airbag. The slide bar is favorable for the slider to slide from top to bottom, and the slider slides from top to bottom and is favorable for the stripper plate to reciprocate, and then plays the extruded effect to the main gasbag. The screw thread is beneficial to the adaptation of the extrusion plate and the screw rod, so that when the screw rod rotates, the extrusion plate descends or ascends, and after the screw rod stops rotating, the extrusion plate is static and keeps the position unchanged. The rocking disc is favorable for the screw rod to rotate, and the rotary disc is favorable for a plurality of rocking discs to rotate together, and is convenient and fast.

Preferably, the inner side above the valve seat is provided with a shock pad, so that the extrusion plate can be prevented from colliding with the inner part above the valve seat after rising.

Preferably, the double-layer valve core comprises a valve core outer layer and a valve core inner layer; a cavity is arranged between the outer layer and the inner layer of the valve core; the inner layer of the valve core is divided into polygonal lugs, an air bag telescopic movable plate is movably connected inside the polygonal lugs, and a sealing layer is arranged on the inner surface of the air bag telescopic movable plate, which is in contact with the polygonal lugs; a secondary air bag is fixed inside the air bag telescopic movable plate, one part of the secondary air bag is positioned in the cavity, a plurality of secondary air bags are connected with first connecting pipes, a plurality of first connecting pipes are connected with second connecting pipes, and the second connecting pipes are connected with third connecting pipes; the other end of the third connecting pipe is connected with the main airbag.

The flexible fly leaf of gasbag is favorable to following the secondary air bag to expand and extend, reduces the secondary air bag and expands and receive rivers impact offset, avoids reducing the effect of adjusting the velocity of flow. The sealing layer prevents water from entering the cavity between the air bag telescopic movable plate and the polygonal lug. The first connecting pipe, the second connecting pipe and the third connecting pipe facilitate gas communication between the primary airbag and the secondary airbag. If the speed of water flow passing through the ball valve does not need to be adjusted, part of impact force of the water flow on the inner layer of the valve core is converted into the impact force on the air bag, and the air bag has elasticity to dissolve the part of impact force, so that the impact force of the water flow on the inner layer of the valve core is finally reduced, and the service life of the double-layer valve core is prolonged.

Preferably, the valve body both ends top is equipped with flexible piece, flexible piece and valve body sliding connection, flexible piece inside has the spring, flexible piece one side is equipped with the pulling piece.

After the telescopic block slides to the upper part of the sliding fixing plate, the inner spring can enable the telescopic block to automatically extend so as to abut against the sliding fixing plate. The pulling block is beneficial to pulling the telescopic block. When not in use, the sliding fixing plate is extruded to shrink, and then the sliding fixing plate can be pushed back to the original position.

Preferably, the pipeline is installed at the valve body both ends, pipeline outside top is equipped with the stopper, the inside spacing groove that is equipped with in valve body both sides, spacing groove and stopper looks adaptation.

Preferably, the pipeline is provided with a sliding fixing plate up and down, and the inner side of the sliding fixing plate is provided with a sealing gasket; one end of the sliding fixing plate on one side is provided with a sliding assembly, and the sliding assembly is positioned in the valve body shell; the sliding assembly comprises a sliding rail, a swinging block, a spring fixing seat, a second spring, a sliding plate and a moving block; one end of the fixed plate is movably connected with the slide rail, one end of the slide rail is hinged with a swinging block, one end of the swinging block is abutted against the fixed plate, and the other end of the swinging block is abutted against the moving block; the moving block is positioned on the sliding plate and movably connected with the sliding plate, one side of the moving block is connected with a second spring, the other end of the second spring is fixed on a spring fixing seat, and the spring fixing seat is fixed inside the valve body shell.

The sliding fixing plate is beneficial to clamping the pipeline, so that the pipeline is connected with the ball valve. The sliding assembly is beneficial to the rotation of the pipeline, namely, the clamping is realized, a wrench is not needed, and the operation is convenient and fast. The slide rail is favorable for the sliding of the sliding fixing plate, and the sealing gasket is favorable for enhancing the sealing performance between the pipeline and the valve body. The swing block is advantageous for defining the position of the slide fixing plate. After the moving block moves, the swinging block can swing, so that the sliding fixing plate can slide downwards and is in contact with the pipeline. The sliding plate is beneficial to the sliding of the moving block; the stopper is located the spacing groove top back, rotates the pipeline, and the stopper is favorable to promoting the removal of removal piece. The spring fixing seat is favorable for fixing the second spring, and the second spring can be ensured to be positioned at the bottom end of the sliding plate when not subjected to thrust, so that the swinging block is abutted to the fixing plate.

Preferably, the moving block is in contact with the limiting block, so that the limiting block is favorable for driving the moving block to move.

Preferably, one end of the moving block is provided with a stop block to prevent the swinging block from sliding out of the moving block.

Preferably, the rotating disc is provided with anti-skidding lines, so that the friction force between the hand and the rotating disc is increased, and the rotating disc is favorably rotated.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention is provided with the main airbag and the secondary airbag, not only can be used as a switch valve, but also can control the flow rate of the medium in the ball valve by regulating and controlling the secondary airbag. After the main gasbag is extruded, the time gasbag drives the flexible fly leaf of gasbag and expands for the diameter that holds the case that the medium passes through reduces, and the velocity of flow of medium is corresponding to be reduced, has the edges and corners on the flexible fly leaf of gasbag simultaneously, also can cut down the velocity of flow of medium, thereby reaches the function of adjustable velocity of flow, has richened the function of ball valve. The main air bag is extruded to regulate the secondary air bag, only the rotating disc needs to be rotated, the screw has a self-limiting function after the rotation, the position of the extrusion plate cannot move, the method is simple, convenient and fast, and manpower and time are saved.

2. The valve core of the ball valve is provided with double layers, and the heights of the secondary air bag and the inner layer of the valve core are kept consistent under the condition that the primary air bag is not extruded. In the use process under the condition, when water flows through the valve core, part of impact force on the inner layer of the valve core can be converted into impact force on the secondary air bag, and the secondary air bag has elasticity so that the part of impact force can be dissolved, and finally the impact force of the water flow on the whole inner layer of the valve core is reduced. The phenomenon that the valve core is damaged after being impacted by the medium for a long time is effectively avoided, the service life of the double-layer valve core is prolonged, the tightness of the device is improved, and the possibility that the medium seeps out and the ball valve rusts per se is reduced. And if the valve core is damaged, only the damaged layer of the valve core can be replaced, so that the cost is saved.

3. The two ends of the valve body are respectively provided with the telescopic block and the sliding fixed block, the sliding assembly in the sliding fixed block drives the sliding fixed block to move and approach to the pipeline, the movable block approaching to the pipeline is extruded and limited by moving the telescopic block, when the valve body is used, the pipeline is placed into the limiting groove of the valve body through the limiting block, then the valve body is rotated to drive the sliding fixed block to press down the fixed valve body, and the telescopic block is pulled, so that the installation of the valve body can be finished. The traditional installation method of the conventional wrench is changed, the pipelines at two ends can be installed only by rotating once, the installation method is simple and rapid, the time of an installation master is saved, and the effect of installing and sealing is effectively guaranteed.

Drawings

FIG. 1 is a schematic structural view of a silicone-resistant stainless steel ball valve in elevation and section according to the present invention;

FIG. 2 is an enlarged schematic view of part A of the silicone-resistant stainless steel ball valve of the present invention;

FIG. 3 is an enlarged schematic view of part B of the silicone-resistant stainless steel ball valve of the present invention;

FIG. 4 is a schematic diagram of a double-layer valve core structure of the silicone-resistant stainless steel ball valve of the present invention;

FIG. 5 is a schematic diagram of the inner layer structure of the valve core of the silicone-resistant stainless steel ball valve of the present invention;

FIG. 6 is a schematic view of the secondary bladder contraction configuration of the silicone-resistant stainless steel ball valve of the present invention;

fig. 7 is a schematic view of the secondary balloon bulging structure of the silicone-resistant stainless steel ball valve of the present invention.

Reference numbers in the figures: 1. adjusting the bolt; 2. a valve stem; 3. a valve seat; 4. a main airbag; 5. a crash pad; 6. a slide bar; 7. a slider; 8. a pressing plate; 9. a screw; 10. rotating the block; 11. a rocking handle; 12. rotating the disc; 13. a valve body; 14. a double-layer valve core; 14-1, a valve core outer layer; 14-2, a valve core inner layer; 15. a pipeline; 16. a telescopic block; 17. pulling the block; 18. a sliding fixing plate; 19. a gasket; 20. a slide rail; 21. a swing block; 22. a spring fixing seat; 23. a second spring; 24. a slide plate; 25. a moving block; 26. a limiting groove; 27. a limiting block; 28. a polygonal bump; 29. an air bag telescopic movable plate; 30. a secondary air bag; 31 a first connecting pipe; 32. a second connecting pipe; 33. a third connecting pipe; 34. and (7) sealing the layer.

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 (b): as shown in fig. 1-7, the silicone-proof stainless steel ball valve comprises a regulating bolt 1, a valve rod 2, a valve seat 3, a valve body 13 and a double-layer valve core 14; the adjusting bolt 1 is used for opening or closing a ball valve. A valve rod 2 is arranged below the adjusting bolt 1 and is used for driving the double-layer valve core 14 to rotate. The valve stem 2 extends through the valve seat 3, and the valve seat 3 facilitates sealing of the entire ball valve. A valve body 13 is arranged below the valve seat 3 and used for accommodating components such as a double-layer valve core 14 and the like. A double-layer valve core 14 is arranged in the valve body 13, and the lower part of the valve rod 2 is movably connected with the double-layer valve core 14. The double-layer valve core 14 is beneficial to reducing the impact force of water flowing through the valve body 13 and regulating the speed of the water.

The interior of the valve seat 3 is provided with a squeezing assembly which can squeeze the primary airbag 4, thereby inflating the secondary airbag 30. The extrusion assembly comprises a sliding rod 6, a sliding block 7, an extrusion plate 8, a screw 9 and a main airbag 4; the main airbag 4 is fixed inside the valve seat 3; two sides of the main airbag 4 are provided with slide bars 6, and the slide bars 6 are connected with the valve seat 3 up and down to enable the slide block 7 to slide up and down; the slide rod 6 is sleeved with the slide block 7, the extrusion plate 8 is connected between the slide blocks 7, and the slide block 7 slides up and down to enable the extrusion plate 8 to move up and down, so that the main airbag is extruded. The two sides of the extrusion plate 8 are penetrated by screw rods 9, the contact surface of the extrusion plate 8 and the screw rods 9 is provided with threads, the threads are matched with the screw rods 9, when the screw rods 9 rotate, the extrusion plate 8 descends or ascends, and after the screw rods 9 stop rotating, the extrusion plate 8 is static and keeps the position unchanged; a rotating block 10 is arranged above the screw rod 9, the rotating block 10 is rotatably connected with the upper portion of the valve seat 3, a rocking disc 11 is fixed above the rotating block 10, and a rotating disc 12 is fixed above the rocking disc 11. The rocking disc 11 enables the screw rod 9 to rotate, and the rotating disc 12 enables the rocking discs 11 to rotate together, so that the operation is convenient and fast.

The inner side above the valve seat 3 is provided with a shock pad 5 which can avoid the collision between the extrusion plate 8 and the inner part above the valve seat 3 after rising.

The double-layer valve core 14 comprises a valve core outer layer 14-1 and a valve core inner layer 14-2; a cavity is arranged between the outer valve core layer 14-1 and the inner valve core layer 14-2; the inner layer 14-2 of the valve core is divided into polygonal convex blocks 28, the inner parts of the polygonal convex blocks 28 are movably connected with air bag telescopic movable plates 29, and the air bag telescopic movable plates 29 expand along with the secondary air bags 30, so that the expansion of the secondary air bags 30 is reduced, the position deviation caused by water flow impact is reduced, and the effect of reducing the flow rate is avoided. The inner face of the airbag telescopic flap 29 contacting the polygonal protrusion 28 is provided with a sealing layer 34 to prevent water from entering the cavity through between the airbag telescopic flap 29 and the polygonal protrusion 28. The secondary airbag 30 is fixed inside the airbag retractable movable plate 29, a part of the secondary airbag 30 is located in the cavity, the plurality of secondary airbags 30 are connected with first connecting pipes 31, the plurality of first connecting pipes 31 are connected with second connecting pipes 32, and the second connecting pipes 32 are connected with third connecting pipes 33; the other end of the third connecting pipe 33 is connected with the main airbag 4. The first connecting tube 31, the second connecting tube 32, and the third connecting tube 33 facilitate the gas communication between the primary airbag 4 and the secondary airbag 30. If the speed of water flow passing through the ball valve is not required to be adjusted, part of impact force of the water flow on the inner layer 14-2 of the valve core is converted into the impact force on the secondary air bag 30, and the secondary air bag 30 has elasticity to dissolve the part of the impact force, so that the impact force of the water flow on the inner layer 14-2 of the valve core is reduced, and the service life of the double-layer valve core 14 is prolonged.

The upper portions of the two ends of the valve body 13 are provided with telescopic blocks 16, the telescopic blocks 16 are connected with the valve body 13 in a sliding mode, a spring is arranged inside the telescopic blocks 16, and one side of each telescopic block 16 is provided with a pulling block 17. After the telescoping block 16 slides over the fixed slide plate 18, the internal spring automatically expands the telescoping block 16 against the fixed slide plate 18. The pulling block 17 facilitates pulling the telescopic block 16. When not in use, the sliding fixing plate 18 is pressed to be contracted, and then the sliding fixing plate can be pushed back to the original position.

Pipeline 15 is installed at valve body 13 both ends, and pipeline 15 outside top is equipped with stopper 27, and valve body 13 both sides are inside to be equipped with spacing groove 26, and spacing groove 26 and stopper 27 looks adaptation.

The pipeline 15 is provided with a sliding fixing plate 18 for clamping the pipeline 15, so that the pipeline 15 is connected with the ball valve. A sealing gasket 19 is arranged on the inner side of the sliding fixing plate 18 to enhance the sealing performance between the pipeline 15 and the valve body 13; one end of the sliding fixing plate 18 on one side is provided with a sliding assembly, and the sliding assembly is positioned in the shell of the valve body 13, so that the pipeline 15 can be clamped by rotating, a wrench is not needed, and the operation is convenient and quick; the sliding component comprises a sliding rail 20, a swinging block 21, a spring fixing seat 22, a second spring 23, a sliding plate 24 and a moving block 25; one end of the sliding fixing plate 18 is movably connected with the sliding rail 20, so that the sliding fixing plate 18 slides. One end of the slide rail 20 is hinged with a swing block 21, and one end of the swing block 21 is abutted against the sliding fixing plate 18, so that the position of the sliding fixing plate 18 can be limited. The other end of the swinging block 21 is abutted against the moving block 25; a moving block 25 is positioned on and movably connected to the sliding plate 24, and the sliding plate 24 facilitates the sliding of the moving block 25. After the moving block 25 moves, the swinging block 21 can swing, so that the sliding fixing plate 18 can slide downwards and contact with the pipeline 15. One side of the moving block 25 is connected with a second spring 23, the other end of the second spring 23 is fixed on a spring fixing seat 22, and the spring fixing seat 22 is fixed inside the housing of the valve body 13. The limiting block 27 is positioned in the limiting groove 26 and is arranged at the top end, the pipeline 15 is rotated, and the limiting block 27 is beneficial to pushing the moving block 25 to move. The spring fixing seat 22 is beneficial to fixing the second spring 23, and the second spring 23 can ensure that the second spring 23 is positioned at the bottom end of the sliding plate 24 when the second spring 23 is not pushed, so that the swinging block 21 is abutted against the fixed plate 18.

The moving block 25 is in contact with the limiting block 27, and the limiting block 27 drives the moving block 25 to move.

One end of the moving block 25 is provided with a stop block to prevent the swinging block 21 from sliding out of the moving block 25.

The anti-skid grains are arranged on the rotating disc 12, so that the friction force between the hand and the rotating disc 12 is increased, and the rotating disc 12 is favorably rotated.

The working principle is as follows: in use, the conduit 15 is first mounted to both ends of the valve body 13. The stopper 27 of the pipe 15 is aligned with the stopper groove 26 of the valve body and inserted into the stopper groove, and the valve body 13 is rotated after the stopper is inserted into the lower end. At this time, the stopper 27 rotates to slide the moving block 25 on the slide plate 24, and presses the second spring 23. In the process of moving the moving block 25, the swinging block 21 is driven to move, the swinging block 21 originally props against the sliding fixing plate 18, and after the swinging block 21 moves, the swinging block is separated from the sliding fixing plate 18, and the function of propping disappears, so that the sliding fixing plate 18 slides under the action of the sliding rail and clings to the pipeline 15. The medium pulls the pulling block 17 by hand to pull out the telescopic block 16, and after the telescopic block 16 is pulled out, the telescopic block 16 automatically extends by using a spring of the telescopic block to abut against the sliding fixing plate 18. At this point, the installation of the piping 15 is completed. If the pipeline 15 needs to be disassembled, the telescopic block 16 is squeezed to be separated from the sliding fixing plate 18, and then the telescopic block 16 is pushed back to the original position. After the sliding fixing plate 18 extruded by the telescopic block 16 is omitted and the pipeline 15 is rotated in the opposite direction, the moving block 25 returns to the original position by utilizing the elasticity of the second spring 23, and drives the swinging block 21 to rotate until the swinging block 21 abuts against the sliding fixing plate 18 again. At this time, the sliding fixing plate 18 is separated from the pipeline 15, and the pipeline 15 can be disassembled. If the flow rate of the invention needs to be adjusted, the rotating disc 12 can be rotated, the rotating disc 12 drives the rocking handle 11 connected below the rotating disc to rotate, so that the plurality of screw rods 9 are driven to rotate, the screw rods 9 rotate, and the extrusion plate 8 with matched threads on the contact surface is driven to move up and down, so that the main airbag 4 is extruded. After the primary air bag 4 is pressed, the secondary air bag 30 expands to change the diameter of the inner part of the double-layer valve core 14, thereby playing the role of adjusting the flow velocity of the medium. The magnitude of the squeezing of the main bag 3 determines the degree of inflation of the airbag 30 at this time, and determines the magnitude of the flow rate. Meanwhile, in the moving process of the extrusion plate 8, the sliding blocks 7 fixed at two ends move up and down on the sliding rod 6, so that the extrusion force of the extrusion plate 8 is more uniform, and the damage of the extrusion plate 8 caused by uneven stress in the extrusion process is avoided. If the height of the secondary air bag 30 is consistent with that of the valve core inner layer 14-2 without pressing the main air bag 4, in the using process under the condition, when water flows through the double-layer valve core 14, a part of impact force on the valve core inner layer 14-2 can be converted into impact force on the secondary air bag 30, and the secondary air bag 30 can dissolve the part of impact force due to elasticity, so that the impact force of the water flow on the whole valve core inner layer 14-2 is finally reduced.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. Prevent silicone stainless steel ball valve, its characterized in that: comprises an adjusting bolt (1), a valve rod (2), a valve seat (3), a valve body (13) and a double-layer valve core (14); a valve rod (2) is arranged below the adjusting bolt (1), the valve rod (2) penetrates through the valve seat (3), a valve body (13) is arranged below the valve seat (3), a double-layer valve core (14) is arranged in the valve body (13), and the lower part of the valve rod (2) is movably connected with the double-layer valve core (14);

an extrusion assembly is arranged in the valve seat (3), and comprises a sliding rod (6), a sliding block (7), an extrusion plate (8), a screw (9) and a main air bag (4); the main air bag (4) is fixed inside the valve seat (3); slide bars (6) are arranged on two sides of the main airbag (4), and the slide bars (6) are vertically connected with the valve seat (3); the sliding rods (6) are sleeved with sliding blocks (7), and extrusion plates (8) are connected between the sliding blocks (7); the screw rods (9) penetrate through the two sides of the extrusion plate (8), threads are arranged on the contact surface of the extrusion plate (8) and the screw rods (9), and the threads are matched with the screw rods (9); a rotating block (10) is arranged above the screw rod (9), the rotating block (10) is rotatably connected with the upper part of the valve seat (3), a rocking disc (11) is fixed above the rotating block (10), and a rotating disc (12) is fixed above the rocking disc (11);

the double-layer valve core (14) comprises a valve core outer layer (14-1) and a valve core inner layer (14-2); a cavity is arranged between the valve core outer layer (14-1) and the valve core inner layer (14-2); the valve core inner layer (14-2) is divided into polygonal lugs (28), an air bag telescopic movable plate (29) is movably connected inside the polygonal lugs (28), and a sealing layer (34) is arranged on the inner surface of the air bag telescopic movable plate (29) in contact with the polygonal lugs (28); a secondary air bag (30) is fixed inside the air bag telescopic movable plate (29), a part of the secondary air bag (30) is positioned in the cavity, a plurality of secondary air bags (30) are connected with first connecting pipes (31), a plurality of first connecting pipes (31) are connected with second connecting pipes (32), and the second connecting pipes (32) are connected with third connecting pipes (33); the other end of the third connecting pipe (33) is connected with the main airbag (4);

pipelines (15) are mounted at two ends of the valve body (13), a limiting block (27) is arranged above the outer side of each pipeline (15), limiting grooves (26) are formed in the two sides of the valve body (13), and the limiting grooves (26) are matched with the limiting blocks (27);

the pipeline (15) is provided with a sliding fixing plate (18) up and down, and the inner side of the sliding fixing plate (18) is provided with a sealing gasket (19); one end of the sliding fixing plate (18) on one side is provided with a sliding assembly, and the sliding assembly is positioned inside the shell of the valve body (13); the sliding assembly comprises a sliding rail (20), a swinging block (21), a spring fixing seat (22), a second spring (23), a sliding plate (24) and a moving block (25); one end of the sliding fixing plate (18) is movably connected with a sliding rail (20), one end of the sliding rail (20) is hinged with a swinging block (21), one end of the swinging block (21) is abutted against the sliding fixing plate (18), and the other end of the swinging block (21) is abutted against a moving block (25); the moving block (25) is located on the sliding plate (24) and movably connected with the sliding plate, one side of the moving block (25) is connected with a second spring (23), the other end of the second spring (23) is fixed on a spring fixing seat (22), and the spring fixing seat (22) is fixed inside a shell of the valve body (13).

2. The silicone resistant stainless steel ball valve of claim 1, wherein: and a shockproof pad (5) is arranged on the inner side above the valve seat (3).

3. The silicone resistant stainless steel ball valve of claim 1, wherein: valve body (13) both ends top is equipped with flexible piece (16), flexible piece (16) and valve body (13) sliding connection, flexible piece (16) inside has the spring, flexible piece (16) one side is equipped with pulling piece (17).

4. The silicone resistant stainless steel ball valve of claim 1, wherein: the moving block (25) is in contact with the limiting block (27).

5. The silicone resistant stainless steel ball valve of claim 1, wherein: one end of the moving block (25) is provided with a stop block.

6. The silicone resistant stainless steel ball valve of claim 1, wherein: the rotating disc (12) is provided with anti-skid grains.