Stop type double-loose-joint ball valve
By introducing a shut-off device and a limiting structure into the ball valve, the problem of traditional double-joint ball valves being unable to close quickly in case of leakage is solved, achieving rapid fluid shut-off and avoiding fluid leakage and safety hazards.
Patent Information
- Application Number
- CN202422721527.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-08
AI Technical Summary
Traditional double-joint ball valves cannot close quickly in case of leakage, leading to a large amount of fluid leakage and posing a safety hazard.
A shut-off double-joint ball valve was designed. By setting a shut-off device between the inlet connector and the auxiliary connector, the shut-off plate and the limiting structure are used to quickly close the shut-off hole and prevent fluid leakage.
It enables instantaneous shut-off of fluid in the event of a leak, saving shut-off time and avoiding large-scale fluid leakage and safety hazards.
Smart Images
Figure CN223563511U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a ball valve, especially a double-joint ball valve capable of stopping. BACKGROUND
[0002] The ball valve is a valve for controlling water flow by using a ball-shaped opening and closing member. The ball valve has a water inlet joint and a water outlet joint. In order to facilitate the connection of the water inlet joint and the water outlet joint with a pipeline, the water inlet joint and the water outlet joint are both provided with a joint structure, thereby forming a double-joint ball valve. However, in the actual use process of the conventional double-joint ball valve, abnormal situations will inevitably occur, such as leakage of the pipeline connected with the water outlet joint. At this time, it is necessary to completely close the double-joint ball valve in the shortest time. Since the ball valve is opened and closed by the ball-shaped opening and closing member, if the valve needs to be switched from a fully open state to a fully closed state, the ball-shaped opening and closing member needs to be rotated by 90 degrees by the hand wheel of the ball valve. This closing method results in a relatively long closing time and cannot achieve the effect of emergency stopping. If the leakage of the pipeline connected with the water outlet joint is serious, a large amount of fluid will be lost, and if the transported fluid is harmful, it will easily cause serious accidents. SUMMARY
[0003] The utility model solves the technical problem of the prior art by providing a double-joint ball valve capable of stopping, which can stop in the event of leakage and effectively avoid the serious leakage of the transported fluid.
[0004] The utility model solves the above technical problem by adopting the following technical scheme:
[0005] The utility model discloses a kind of double live ball valves of intercepting type, including valve body, water inlet connector being located at the left side of valve body and water outlet connector being located at the right side of valve body, opening and closing cavity is equipped in valve body, ball type opening and closing part is equipped in opening and closing cavity, valve rod is equipped on the upper end of ball type opening and closing part, valve rod upper end is up to the outside of valve body and is equipped with hand wheel, the left side of valve body is equipped with one and the auxiliary connector of opening and closing cavity is through, water inlet connector is located in the left side of auxiliary connector;The auxiliary connector is connected between water inlet connector by a intercepting device;The intercepting device includes the intercepting seat between auxiliary connector and water inlet connector;The middle part of intercepting seat is equipped with one intercepting hole, and water inlet connector and auxiliary connector are through intercepting hole between them;Upper flexible cavity is equipped in the upper part of intercepting seat;Lower flexible cavity is equipped in the lower part of intercepting seat and is located in the just below of upper flexible cavity;Upper flexible cavity and lower flexible cavity are through intercepting hole and are through;Upper flexible cavity is equipped with the intercepting plate matched with it in;The center of the upper surface of intercepting seat is equipped with one flexible hole and is through with upper flexible cavity;The center of the upper surface of intercepting plate is equipped with one pressing rod;The upper end of pressing rod is up to the flexible hole and is equipped with one pressing plate;The lower surface of pressing plate and the upper surface of intercepting seat are equipped with one reset spring and are wrapped in the outer of pressing rod;The left and right sides of lower flexible cavity are equipped with the limiting structure matched with intercepting plate;The limiting structure can be positioned when intercepting plate moves to lower flexible cavity.
[0006] The limiting structure includes guide seat being located at the left and right sides of the lower part of intercepting seat;The center of guide seat is equipped with one guide hole and is through with lower flexible cavity;The guide hole is equipped with the limiting shaft matched with it in;The inner end of limiting shaft is inserted into lower flexible cavity and is equipped with one pressure inclined surface;The pressure inclined surface of the left and right limiting shafts is opposite to each other, and the interval between the pressure inclined surface of the left and right limiting shafts gradually decreases from top to bottom;The upper inner wall of guide hole is equipped with one guide sliding groove;The upper surface of limiting shaft is equipped with the guide block matched with guide sliding groove;The end of guide seat is equipped with the rebound structure matched with limiting shaft;The left and right sides of the lower end of intercepting plate are equipped with the limiting hole mutually symmetrical;The left and right sides of the lower surface of intercepting plate are equipped with the extrusion inclined surface matched with pressure inclined surface;The interval between the left and right extrusion inclined surfaces gradually decreases from top to bottom.
[0007] The rebound structure includes limiting cover being screwed on the outer of guide seat;The center of limiting cover is equipped with one movable hole;The outer end of limiting shaft outer end face is equipped with one movable rod;The outer end of movable rod is outward through movable hole;The inner wall of limiting cover and the outer end of limiting shaft outer end face are equipped with one rebound spring and are wrapped in the outer of movable rod.
[0008] The inner wall of movable hole is equipped with one annular sealing groove;The sealing groove is equipped with the sealing ring matched with it in.
[0009] The center of the left side wall of the intercepting seat is provided with a left fixing groove; the center of the right side wall of the intercepting seat is provided with a right fixing groove coaxial with the left fixing groove; the center of the groove bottom of the right fixing groove and the center of the groove bottom of the left fixing groove are connected through the intercepting hole; the outer wall of the right end of the water inlet connector is provided with a left fixing part matched with the left fixing groove; the outer wall of the left end of the auxiliary connector is provided with a right fixing part matched with the right fixing groove; the left fixing part and the groove bottom of the left fixing groove and the right fixing part and the groove bottom of the right fixing groove are fixed through a plurality of fixing screws uniformly distributed in a circle.
[0010] The upper surface of the intercepting plate is provided with a plurality of uniformly distributed buffer pads made of rubber.
[0011] The bottom of the lower telescopic cavity is provided with a bumper pad matched therewith, and the bumper pad is made of rubber; the left and right sides of the bottom of the lower telescopic cavity are provided with symmetrically arranged clamping grooves; the left and right sides of the bumper pad are provided with clamping parts matched with the clamping grooves.
[0012] The intercepting seat is composed of a left shell and a right shell symmetrically arranged; the left shell and the right shell are fixed through a plurality of uniformly distributed fastening screws.
[0013] The beneficial effects of the utility model are:
[0014] Compared with the prior art, the interceptable double live ball valve adopting the structure of the utility model can be stopped in an emergency in case of leakage, and when emergency stopping is needed, the pressing plate only needs to be pressed downward, the intercepting plate will close the intercepting hole, the water inlet connector cannot pass through the intercepting hole and be connected with the auxiliary connector, the water flow is intercepted in the water inlet connector, and the time consumed by the hand wheel to rotate by 90 degrees and close the ball valve through the ball-shaped opening and closing part is much greater than the time consumed by directly pressing the intercepting plate to close the intercepting hole, so that a large amount of closing time is effectively saved, the effect of instant fluid interception is realized, the situation that a large amount of fluid is leaked due to a long closing process of the ball valve is effectively avoided, and safety hazards can be effectively eliminated. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is a structural schematic view of the interceptable double live ball valve of the utility model;
[0016] Figure 2 is an enlarged view of A of Figure 1 ;
[0017] Figure 3 is an enlarged view of B of Figure 1 ; DETAILED DESCRIPTION
[0018] The utility model will be further described in detail in combination with the drawings and the specific implementation:
[0019] Please refer to Figures 1 to 3The utility model provides a kind of double live ball valve of intercepting type, including valve body 1, water inlet connector 2 being located at the left side of valve body 1 and water outlet connector 3 being located at the right side of valve body 1, it is equipped with opening and closing cavity 4 in valve body 1, it is equipped with ball type opening and closing member 5 in opening and closing cavity 4, ball type opening and closing member 5 upper end is equipped with valve rod 6, valve rod 6 upper end is up and out to valve body 1 and is equipped with hand wheel 7, the left side of the valve body 1 is equipped with a auxiliary connector 8 with opening and closing cavity 4 is through, water inlet connector 2 is located in auxiliary connector 8 left side;The auxiliary connector 8 is connected between water inlet connector 2 by a intercepting device;The intercepting device includes the intercepting seat 9 between auxiliary connector 8 and water inlet connector 2;The middle part of the intercepting seat 9 is equipped with a intercepting hole 10, water inlet connector 2 and auxiliary connector 8 are through intercepting hole 10 between them;The upper part of the intercepting seat 9 is equipped with a upper telescopic cavity 11;The lower part of the intercepting seat 9 is equipped with a lower telescopic cavity 12 located directly below upper telescopic cavity;The upper telescopic cavity 11 and lower telescopic cavity 12 are through intercepting hole 10 between them;The upper telescopic cavity 11 is equipped with the intercepting plate 13 matched with it;The upper surface center of the intercepting seat 9 is equipped with a telescopic hole 14 with upper telescopic cavity 11 is through;The upper surface center of the intercepting plate 13 is equipped with a pressure rod 15;The upper end of the pressure rod 15 is up and passes through telescopic hole 14 and is equipped with a pressure plate 16;The lower surface of the pressure plate 16 and the upper surface of the intercepting seat 9 are equipped with a reset spring 17 sleeved on the outer of pressure rod 15;The left and right sides of the lower telescopic cavity 12 are equipped with the limiting structure matched with intercepting plate 13;The limiting structure can be positioned when intercepting plate 13 moves down to the lower telescopic cavity 12.
[0020] The limiting structure includes guide seat 18 being located at the left and right sides of the lower part of the intercepting seat 9;The center of the guide seat 18 is equipped with a guide hole 19 with lower telescopic cavity 12 is through;The guide hole 19 is equipped with the limiting shaft 20 matched with it in;The inner end of the limiting shaft 20 is inserted into lower telescopic cavity 12 and is equipped with a pressure inclined surface 21;The pressure inclined surface 21 of the left and right limiting shafts 20 is opposite to each other, and the interval between the pressure inclined surface 21 of the left and right limiting shafts 20 gradually decreases from top to bottom;The upper side inner wall of the guide hole 19 is equipped with a guide sliding groove 22;The upper surface of the limiting shaft 20 is equipped with the guide block 23 matched with guide sliding groove 22;The end of the guide seat 18 is equipped with the rebound structure matched with limiting shaft 20;The left and right sides of the lower end of the intercepting plate 13 are equipped with the limiting hole 24 symmetrical to each other;The left and right sides of the lower surface of the intercepting plate 13 are equipped with the extrusion inclined surface 25 matched with pressure inclined surface 21;The interval between the left and right extrusion inclined surfaces 25 gradually decreases from top to bottom.
[0021] The rebound structure comprises a limiting cover 26 screwed to the outer side of the guide seat 18; the limiting cover 26 is provided with a movable hole 27 in the center; the outer end surface of the limiting shaft 20 is provided with a movable rod 28 in the center; the outer end of the movable rod 28 outwardly penetrates the movable hole 27; and a rebound spring 29 is arranged on the outer side of the movable rod 28 between the inner wall of the limiting cover 26 and the outer end surface of the limiting shaft 20.
[0022] The inner wall of the movable hole 27 is provided with a sealing groove 30 in the shape of a ring; and the sealing groove 30 is provided with a sealing ring 31 matched therewith.
[0023] The left side wall of the intercepting seat 9 is provided with a left fixed groove 32 in the center; the right side wall of the intercepting seat 9 is provided with a right fixed groove 33 coaxial with the left fixed groove 32; the center of the groove bottom of the right fixed groove 33 and the center of the groove bottom of the left fixed groove 32 are connected through the intercepting hole 10; the outer wall of the right end of the water inlet connector 2 is provided with a left fixed part 34 matched with the left fixed groove 32; the outer wall of the left end of the auxiliary connector 8 is provided with a right fixed part 35 matched with the right fixed groove 33; and the left fixed part 34 and the groove bottom of the left fixed groove 32, and the right fixed part 35 and the groove bottom of the right fixed groove 33 are fixed through a plurality of fixed screws 36 uniformly distributed in a circle.
[0024] The upper surface of the intercepting plate 13 is provided with a plurality of uniformly distributed buffer pads 37 made of rubber.
[0025] The bottom of the lower telescopic cavity 12 is provided with an anti-collision pad 38 matched therewith, and the anti-collision pad 38 is made of rubber; the left and right sides of the bottom of the lower telescopic cavity 12 are provided with symmetrically arranged clamping grooves 39; and the left and right sides of the anti-collision pad 38 are provided with clamping parts 40 matched with the clamping grooves 39.
[0026] The intercepting seat 9 is composed of a left shell 901 and a right shell 902 which are symmetrically arranged; and the left shell 901 and the right shell 902 are fixed through a plurality of uniformly distributed fastening screws 41.
[0027] The use method of the utility model is as follows:
[0028] The water inlet connector 2 can be used for connecting a water inlet pipeline, and the water outlet connector 3 can be used for connecting a water outlet pipeline; when the ball-shaped opening and closing part 5 is opened, the water flow in the water inlet pipeline will flow into the auxiliary connector 8 through the water inlet connector 2 and the intercepting hole 10 on the intercepting seat 9 in sequence, and then flow into the water outlet pipeline connected with the water outlet connector 3 through the ball-shaped opening and closing part 5 and the water outlet connector 3 in sequence, so as to be used.
[0029] If an emergency leakage occurs, the ball valve can be closed instantly by the intercepting device. When the intercepting device is needed, the pressure plate 16 can be directly pressed down by external force. When the pressure plate 16 moves down, the pressure plate 16 will drive the intercepting plate 13 to move down synchronously through the pressure rod 15. At this time, the lower end of the intercepting plate 13 moves into the intercepting hole 10. When the lower end of the intercepting plate 13 moves into the lower extension cavity 12, the intercepting plate 13 completely seals the intercepting hole 10. At this time, the lower end of the intercepting plate 13 continues to move down along the inner wall track of the lower extension cavity 12. Finally, the extrusion inclined surface 25 on the left and right sides of the lower end of the intercepting plate 13 comes into contact with the pressure inclined surface 21 on the end of the limiting shaft 20 on the left and right sides. The inclined angles of the extrusion inclined surface 25 and the pressure inclined surface 21 are consistent. With the continuous movement of the intercepting plate 13, the extrusion inclined surface 25 can quickly move down along the track of the pressure inclined surface 21, thereby quickly extruding the limiting shaft 20 outward. The limiting shaft 20 on the left and right sides is respectively extruded into the limiting hole 24 on the left and right sides. With the lower end of the intercepting plate 13 passing through the gap between the pressure inclined surface 21 on the left and right sides, the inner end of the limiting shaft 20 on the left and right sides is pressed against the outer wall on the upper and lower sides of the intercepting plate 13 under the elastic force of the rebound spring 29. When the limiting hole 24 on the left and right sides of the lower end of the intercepting plate 13 moves to the position corresponding to the limiting shaft 20, the inner end of the limiting shaft 20 will be elastically inserted into the limiting hole 24 under the elastic force of the rebound spring 29, thereby fixing the intercepting plate 13 after moving down through the limiting shaft 20 on the left and right sides. When the intercepting plate 13 is fixed by the limiting shaft 20 on the left and right sides, the intercepting plate 13 is in a state of completely closing the intercepting hole 10. The water inlet connector 2 and the auxiliary connector 8 are connected through the intercepting hole 10. When the intercepting hole 10 is closed, the water flow in the water inlet pipeline is intercepted in the water inlet connector 2, so that it cannot flow to the water outlet pipeline, thereby achieving the intercepting effect.
[0030] When the intercepting hole 10 needs to be opened, the limiting shaft 20 can be moved out of the limiting hole 24 on the intercepting plate 13 by pulling the limiting shaft 20 outward through the end of the movable rod 28 exposed outside the limiting cover 26. After losing the limitation of the limiting shaft 20, the intercepting plate 13 moves upward under the elastic force of the reset spring 17. Then the end of the movable rod 28 can be released. At this time, the limiting shaft 20 will be reset by the rebound spring 29. In actual pulling of the movable rod, in order to facilitate force exertion on the movable rod 28, a pull ring or other structure convenient for pulling can be screwed on the end of the movable rod 28. The upper inner wall of the guide hole 19 is provided with a guide sliding groove 22, and the upper surface of the limiting shaft 20 is provided with a guide block 23 matched with the guide sliding groove 22. The existence of the guide block 23 can play a guiding sliding effect when the limiting shaft 20 moves along the guide hole 19, effectively avoiding the change of the angle of the pressure inclined surface 21 due to the rotation of the limiting shaft 20.
[0031] In summary, the utility model discloses can stop in the case of leakage, need only to press down the pressing plate 16 when stopping, and the cutting-off hole 10 will be closed by cutting-off plate 13, so that the water inlet joint 2 cannot pass through the cutting-off hole 10 and the auxiliary joint 8, and the water flow is cut off in the water inlet joint 2, and the time consumed by the hand wheel rotating 90 degrees to close the ball valve through the ball-shaped opening and closing element 5 is much greater than the time consumed by directly pressing down the cutting-off plate 13 to close the cutting-off hole 10, thereby effectively saving a large amount of closing time, achieving the effect of cutting off the fluid instantly, effectively avoiding the situation that a large amount of fluid leaks due to the long process of closing the ball valve, and effectively eliminating the safety hazard.
[0032] The movable hole 27 is provided with a ring-shaped sealing groove 30 on the inner wall, and a sealing ring 31 matched with the sealing groove 30 is arranged in the sealing groove 30. The sealing ring 31 can effectively ensure the sealing between the inner wall of the movable hole 27 and the outer wall of the movable rod 28, and avoid leakage.
[0033] The left side wall of the cutting-off seat 9 is provided with a left fixing groove 32 at the center, and the right side wall of the cutting-off seat 9 is provided with a right fixing groove 33 coaxial with the left fixing groove 32. The center of the groove bottom of the right fixing groove 33 is connected with the center of the groove bottom of the left fixing groove 32 through the cutting-off hole 10. The outer wall of the right end of the water inlet joint 2 is provided with a left fixing part 34 matched with the left fixing groove 32. The outer wall of the left end of the auxiliary joint 8 is provided with a right fixing part 35 matched with the right fixing groove 33. The left fixing part 34 and the groove bottom of the left fixing groove 32, and the right fixing part 35 and the groove bottom of the right fixing groove 33 are fixed by a plurality of circumferentially distributed fixing screws 36. This fixing mode can not only ensure the stability of the connection between the water inlet joint 2 and the auxiliary joint 8 through the cutting-off seat 9, but also facilitate the disassembly and assembly of the water inlet joint 2, the auxiliary joint 8 and the cutting-off seat 9, thereby facilitating the maintenance and replacement of the internal components of the cutting-off seat 9.
[0034] The upper surface of the cutting-off plate 13 is provided with a plurality of evenly distributed buffer pads 37 made of rubber. The buffer pads 37 are fixed on the upper surface of the cutting-off plate 13 by glue. The existence of the buffer pads 37 can avoid the collision and abrasion of the upper surface of the cutting-off plate 13 when the cutting-off plate 13 is reset upward by the reset spring 17.
[0035] The bottom of the lower telescopic cavity 12 is provided with an anti-collision pad 38 matched therewith. The anti-collision pad 38 is made of rubber. The left and right sides of the bottom of the lower telescopic cavity 12 are provided with symmetrically arranged clamping grooves 39. The left and right sides of the anti-collision pad 38 are provided with clamping parts 40 matched with the clamping grooves 39. The existence of the anti-collision pad 38 can avoid the collision and abrasion of the lower end of the cutting-off plate 13 when the cutting-off plate 13 moves downward.
[0036] The intercepting seat 9 is composed of a left shell 901 and a right shell 902 which are symmetrical to each other. The left shell 901 and the right shell 902 are fixed by a plurality of evenly distributed fastening screws 41. This split assembly manner can facilitate the processing of the interior of the intercepting seat 9 to the greatest extent, and the assembly of the internal components.
Claims
1. A kind of double-acting ball valve, comprising valve body, inlet connector arranged in the left side of valve body and outlet connector arranged in the right side of valve body, opening and closing cavity is arranged in valve body, ball-type opening and closing element is arranged in opening and closing cavity, valve rod is arranged in the upper end of ball-type opening and closing element, the upper end of valve rod is upwardly out of valve body and hand wheel is arranged, it is characterized by: The valve body left side is equipped with an auxiliary joint which is communicated with the opening and closing cavity, and the water inlet joint is located at the left side of the auxiliary joint; the auxiliary joint and the water inlet joint are connected through a cutting device; the cutting device includes a cutting seat which is arranged between the auxiliary joint and the water inlet joint; the cutting seat is equipped with a cutting hole in the middle part, and the water inlet joint and the auxiliary joint are communicated through the cutting hole; the upper part of the cutting seat is equipped with an upper telescopic cavity; the lower part of the cutting seat is equipped with a lower telescopic cavity which is located directly below the upper telescopic cavity; the upper telescopic cavity and the lower telescopic cavity are communicated through the cutting hole; the upper telescopic cavity is equipped with a cutting plate which is matched with the upper telescopic cavity; the upper surface of the cutting seat is equipped with a telescopic hole which is communicated with the upper telescopic cavity; the upper surface of the cutting plate is equipped with a pressing rod; the upper end of the pressing rod penetrates the telescopic hole upward and is equipped with a pressing plate; the lower surface of the pressing plate is equipped with a return spring which is sleeved on the outer part of the pressing rod; the left and right sides of the lower telescopic cavity are equipped with limiting structures which are matched with the cutting plate; the limiting structures can limit the cutting plate when the cutting plate moves downward into the lower telescopic cavity.
2. The double-block and double-chock ball valve of claim 1, wherein: The limiting structures include guide seats which are arranged on the left and right sides of the lower part of the cutting seat; the guide seats are equipped with guide holes which are communicated with the lower telescopic cavity; the guide holes are equipped with limiting shafts which are matched with the guide holes; the inner ends of the limiting shafts penetrate into the lower telescopic cavity and are equipped with pressure inclined surfaces; the pressure inclined surfaces of the limiting shafts on the left and right sides are opposite to each other, and the distance between the pressure inclined surfaces of the limiting shafts on the left and right sides gradually decreases from top to bottom; the inner wall of the upper side of the guide hole is equipped with a guide sliding groove; the upper surface of the limiting shaft is equipped with a guide block which is matched with the guide sliding groove; the end part of the guide seat is equipped with a rebound structure which is matched with the limiting shaft; the left and right sides of the lower end of the cutting plate are equipped with limiting holes which are symmetrical to each other; the left and right sides of the lower surface of the cutting plate are equipped with extrusion inclined surfaces which are matched with the pressure inclined surfaces; the distance between the extrusion inclined surfaces on the left and right sides gradually decreases from top to bottom.
3. A double-block and bleed ball valve according to claim 2, wherein: The rebound structure includes a limiting cover which is screwed on the outer part of the guide seat; the center of the limiting cover is equipped with a movable hole; the end face of the outer end of the limiting shaft is equipped with a movable rod; the outer end of the movable rod penetrates the movable hole outward; the inner wall of the limiting cover and the end face of the outer end of the limiting shaft are equipped with a rebound spring which is sleeved on the outer part of the movable rod.
4. The double-block and double-chock ball valve of claim 3, wherein: The inner wall of the movable hole is equipped with a sealing groove which is annular; the sealing groove is equipped with a sealing ring which is matched with the sealing groove.
5. The double-block and double-chock ball valve of claim 1, wherein: The left side wall of the cutting seat is equipped with a left fixed groove in the center; the right side wall of the cutting seat is equipped with a right fixed groove which is coaxial with the left fixed groove; the center of the groove bottom of the right fixed groove is communicated with the center of the groove bottom of the left fixed groove through the cutting hole; the outer wall of the right end of the water inlet joint is equipped with a left fixed part which is matched with the left fixed groove; the outer wall of the left end of the auxiliary joint is equipped with a right fixed part which is matched with the right fixed groove; the left fixed part and the groove bottom of the left fixed groove, and the right fixed part and the groove bottom of the right fixed groove are fixed through a plurality of fixed screws which are uniformly distributed in a circle.
6. The double-block and double-chock ball valve of claim 1, wherein: The upper surface of the cutting plate is equipped with a plurality of evenly distributed buffer pads which are made of rubber.
7. The double-block and double-chock ball valve of claim 1, wherein: The bottom of the lower telescopic cavity is provided with a bump stop pad matched with the bottom, and the bump stop pad is made of rubber material; the left and right sides of the bottom of the lower telescopic cavity are provided with symmetric clamping grooves; the left and right sides of the bump stop pad are provided with clamping portions matched with the clamping grooves.
8. The double-block and double-chock ball valve of claim 1, wherein: The arresting seat is composed of a left shell and a right shell which are symmetric to each other; the left shell and the right shell are fixed through a plurality of evenly distributed fastening screws.