A quick-install sealing plug valve

Abstract

The present invention relates to the field of valves, and discloses a quick-install sealing type plug valve, comprising a valve body and a valve plug. The valve body comprises a valve cavity and a valve tube. An inner wall of the valve tube is provided with an assembly inner tube extending toward one end away from the valve cavity. An assembly annular groove is formed between the valve tube and the assembly inner tube. A quick-install sealing module which is sealingly connected to a pipe to be connected is arranged in the assembly annular groove. The quick-install sealing module comprises a self-centering introduction clamping component, a sealing pressing component and a delayed air supply holding component. As the pipe is inserted into the assembly annular groove, the self-centering introduction clamping component can keep the pipe and the valve pipe in a concentric state and stably clamp them circumferentially on the outer annular wall of the pipe. At the same time, the delayed air supply holding component first compresses the gas and, after the pipe is inserted into the specified position, supplies gas to the sealing pressing component to make it expand in an annular shape and elastically seal and press against the inner annular wall of the pipe. The plug valve can be quickly installed with pipes of various sizes without using tools, and the assembly is convenient and the adaptability is significantly improved.

Description

Technical Field

[0001] The invention relates to the field of valves, and in particular to a quick-install sealing plug valve. Background Art

[0002] A plug valve is a valve whose valve plug is in the shape of a plunger and which can be opened or closed by rotating it 90 degrees so that the channel opening on the valve plug can be connected or staggered with the channel on the valve body.

[0003] The Chinese patent application with application number 201910473629.0 discloses a plug valve, including a valve body and a plug (valve plug), the valve body includes a cavity in the middle and channels at both ends of the cavity, and the plug includes a plug body that rotates in the cavity in a sealed manner and a transmission shaft and a rotating shaft located at the upper and lower ends of the plug body, respectively. The existing valve body will have a flange integrally formed at the end of its channel. When the valve body is installed with a pipeline, the diameter of the pipeline needs to match the diameter of the channel of the valve body, and a flange of corresponding size must be installed at the end of the pipeline. A sealing ring is embedded between the pipeline flange and the channel flange, and the two flanges are locked by bolts and nuts to achieve a sealed connection between the valve body and the pipeline.

[0004] The existing plug valves have the following room for improvement: 1. Pipes and plug valves are produced and sold independently, which means that when selecting and matching them, they need to strictly follow their respective sizes and flange models. Once there is a deviation in the matching, assembly cannot be performed, resulting in poor adaptability; 2. When assembling or disassembling the existing plug valves and pipes, tools are required, and the limit bolts need to be turned while the nuts need to be locked. If there are no tools on hand, the operation cannot be performed, resulting in inconvenience in installation; 3. Generally, more than 6 sets of bolts and nuts are required between the existing flanges, resulting in low installation efficiency. Summary of the invention

[0005] Aiming at the shortcomings of low adaptability, inconvenient installation and low installation efficiency of existing plug valves and pipelines, the present invention provides a quick-installation sealing plug valve with increased adaptability and quick installation.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0007] A quick-install sealing plug valve comprises a valve body and a valve plug. The valve body comprises a valve cavity in the middle of which the valve plug is assembled and valve tubes at both ends of the valve cavity. An assembly inner tube is extended from the inner wall of the valve tube to the end away from the valve cavity. An assembly ring groove for assembling a pipeline is formed between the valve tube and the assembly inner tube. A quick-install sealing module is arranged in the assembly ring groove and is sealed with the pipeline to be connected. The quick-install sealing module comprises:

[0008] The self-centering introduction clamping assembly includes at least three clamping blocks circumferentially spaced and distributed on the inner wall of the valve pipe. The clamping blocks are provided with an introduction slope for the pipeline to be introduced and the clamping blocks are elastically telescopically arranged along the radial direction of the valve pipe;

[0009] The sealing and pressing assembly comprises a first annular airbag circumferentially arranged on the outer annular wall of the assembled inner tube, the first annular airbag can expand or contract, and can seal and press against the inner annular wall of the pipe after expansion;

[0010] The delayed air supply holding component comprises a plurality of air storage components fixed at the bottom of the assembly ring groove at circumferential intervals, a first piston rod which moves in a sealed manner in the air storage component and whose rod body extends in the opening direction of the assembly ring groove, and a driving ring which is fixed to the rod body ends of all the first piston rods at the same time, an air cavity is built in the bottom of the assembly ring groove, a first air supply pipeline is connected between the air cavity and the first annular air bag, an on-off component which is connected or disconnected with the air cavity is arranged between the piston bottom of the first piston rod and the bottom of the air storage component, and a check block which can be elastically extended along the radial direction of the valve tube and can allow the driving ring to pass in one direction is arranged on the inner wall of the valve tube;

[0011] The movement of the drive ring is controlled by the insertion of the pipe into the assembly ring groove. When the drive ring moves to one end of the check block close to the valve cavity, the drive ring stops. At this time, the on-off assembly is connected, and the first annular airbag expands and seals against the inner ring wall of the pipe.

[0012] By adopting the above scheme, when the plug valve is installed on the pipeline, the size of the pipeline only needs to be able to be inserted into the assembly ring groove, and it can play an adaptable role for pipelines within a certain diameter range. During installation, the introduction slope of the self-centering introduction clamping mechanism can be used for pipeline introduction. Applying a certain thrust can enable the pipeline to overcome the friction caused by the clamping force of the clamping block, so that the pipeline is inserted into the assembly ring groove in a state concentric with the valve pipe and after being inserted to a preset depth, the clamping block maintains a stable clamping force to clamp on the outer ring wall of the pipeline. In the delayed air supply holding component, the first piston rod compresses the air pressure inside the air storage component as the drive ring advances, and the advancement of the drive block is controlled by the pipeline After the pipe is inserted to a preset depth, the driving ring moves forward to the non-return side of the non-return block. At this time, the on-off assembly opens, and the compressed gas enters the air cavity and enters the first annular airbag through the first gas transmission pipeline. After the first annular airbag expands, it presses against the inner ring wall of the pipe in a circumferential seal to achieve a sealed connection between the pipe and the valve pipe. After the first annular airbag expands, it has both sealing and pressing clamping properties. The clamping block and the first annular airbag also have the function of floating sealing when combined. When the plug valve or the pipe is subjected to radial impact, the two can be quickly reset after radial misalignment occurs, and both can be ensured to be in a sealed state during misalignment and reset.

[0013] Preferably, the on-off assembly includes a conical thorn with a tip facing outward protruding from the piston end of the first piston rod, a groove opened at the bottom of the air storage component, and a rubber layer fixed in the groove and through which the conical thorn can pass. A fourth matching groove corresponding to the rubber layer and connected to the air cavity is provided at the bottom of the assembly ring groove, and an outer wall of the conical thorn is provided with a through air groove.

[0014] By adopting the above scheme, the cone thorn approaches the rubber layer as the first piston rod advances. When the cone thorn pierces the rubber layer and the air groove is located in the air storage component and the air cavity at the same time, the compressed air in the air storage component can be injected into the first annular airbag. When the cone thorn retreats, the air in the air cavity returns to the air storage component from the punctured hole in the rubber layer.

[0015] Preferably, a first elastic member is sleeved on the first piston rod, with two ends thereof elastically contacting the air storage component and the drive ring respectively.

[0016] With the above solution, the first elastic member accelerates the resetting speed of the gas storage component and the contraction speed of the first annular airbag. When the annular airbag releases the pressure and clamping on the inner ring wall of the pipeline, the pipeline can be pulled out more easily.

[0017] Preferably, a plurality of first annular airbags are distributed at intervals along the axial direction of the assembly inner tube and are connected to the first gas pipeline at the same time.

[0018] By adopting the above solution, the sealing performance of the first annular airbag on the inner wall of the pipeline and the pressing and clamping performance are increased, and the difficulty of detaching the pipeline is increased.

[0019] Preferably, guide rollers are provided on the introduction slope of the clamp block and the clamping end of the clamp block to facilitate the introduction of the pipe, and a clamping and suction component is provided on the clamp block to adsorb the outer ring wall of the pipe after the pipe is introduced, and the clamping and suction of the clamping and suction component is controlled by the connectivity of the on-off component.

[0020] With the above scheme, the friction between the clamp block and the pipe greatly increases the difficulty of inserting the pipe. After the guide roller is set, the sliding friction is converted into rolling friction, which can greatly save the force of inserting the pipe. However, it will reduce the stability of the clamp block clamping the outer wall of the pipe. Therefore, after the clamping and suction assembly is set, the clamping and suction force can be increased while the clamping force is increased, which not only does not reduce the original clamping force, but also can further increase the total clamping force between the clamp block and the outer wall of the pipe, increasing the difficulty of the pipe axially disengaging from the assembly ring groove.

[0021] Preferably, the clamping and suction assembly includes a first groove on the clamping end of the clamping block, which is recessed at the end of the guide roller away from the introduction inclined surface, an adsorption block that seals and slides in the first groove and has an opening toward the opening of the first groove, and a second piston rod that seals and slides in the adsorption block and has a rod body away from the opening of the first groove. A sealing block that seals and slides with the first groove is provided at one end of the second piston rod away from the opening of the first groove, an elastic layer is provided at the end of the adsorption block facing the first groove, an air injection hole is provided on the side of the first groove away from the introduction inclined surface, a second elastic member is provided at the bottom of the first groove, and two ends of the second elastic member are respectively elastically abutted against the sealing block and the bottom of the first groove, and a second air supply pipeline is provided on the inner wall of the valve tube, and two ends of the second elastic member are respectively connected to the air injection hole and the air cavity.

[0022] By adopting the above scheme, the clamping and suction assembly will only operate when the cone pierces the rubber layer and compresses the compressed air in the air storage component into the air cavity. Due to the presence of the second elastic member, the adsorption block will first partially extend and elastically press against the outer ring wall of the pipe, and then the sealing block will move away from the adsorption block. The adsorption port of the adsorption block will be adsorbed on the outer ring wall of the pipe with negative pressure, thereby realizing the dual functions of clamping and adsorption of the adsorption block.

[0023] Preferably, a third matching groove is provided on the valve tube for the extension and retraction of the clamp block, the end of the second gas supply pipeline away from the air cavity is connected to the gas injection hole, and the inner wall of the third matching groove is provided with an adaptive sealing component which can always maintain the air pressure switching of the adsorption block as the extension and retraction stroke of the clamp block changes.

[0024] Preferably, the adaptive sealing assembly includes a second groove which is recessed on the inner wall of the third mating through groove with the second gas pipeline as the center, a second annular airbag which is embedded in the second groove and can be expanded to seal against the outer wall of the clamping block or contracted to fit into the gap of the clamping block, and a third gas pipeline which has its two ends connected to the second annular airbag and the second gas pipeline respectively.

[0025] By adopting the above scheme, when pipes of different diameters are inserted into the assembly ring groove, the telescopic stroke of the clamp block is different. An adaptive sealing component is provided, and the flexibility of the clamp block is not affected when the clamp block is telescoped. After the clamp block is telescoped and the pipe is inserted to a preset depth, the third annular airbag expands and seals the space between the second groove and the clamp block, so that the compressed air output by the second gas pipeline can enter the gas injection hole and form a negative pressure at the end of the sealing block when it is extended.

[0026] Preferably, a synchronous unlocking structure is provided on the outer ring wall of the valve tube, which can simultaneously realize the retraction of the check block to release the limit on the drive ring.

[0027] Preferably, the synchronous unlocking structure includes a second matching through groove arranged through the check block, an externally threaded sleeve fixed to the outside of the valve tube, and a threaded sleeve threadedly fitted on the externally threaded sleeve. A driving ring is coaxially arranged on one end of the threaded sleeve close to the valve chamber, and movable through grooves corresponding to the check block and extending along the axial direction of the valve tube are circumferentially spaced on the externally threaded sleeve. A connecting rod is fixed on the inner ring wall of the driving ring and is located between the valve tube and the externally threaded sleeve after passing through the movable through groove. A matching block matching with the movable through groove is fixed on the end of the connecting rod away from the externally threaded sleeve, and the end of the matching block close to the check block is arranged as a matching inclined surface which drives the check block to retract as it is plugged into the movable through groove.

[0028] By adopting the above scheme, it is only necessary to rotate the threaded sleeve to drive the driving ring forward, drive the matching block to be inserted into the second matching groove of the check block, and as the matching block continues to move forward, the check block retracts to release the limit on the driving ring. As the air in the air storage component is restored, the force of the first annular airbag and the adsorption block on the inner and outer walls of the pipeline can be released, so that the pipeline can be smoothly pulled out of the valve tube.

[0029] The present invention has significant technical effects due to the adoption of the above technical solutions: when the plug valve is installed on the pipeline, the size of the pipeline only needs to be able to be inserted into the assembly ring groove, and it can adapt to pipelines within a certain diameter range. A self-centering introduction mechanism, a delayed air supply holding component, a sealing pressing component, a clamping and suction component, and a synchronous unlocking structure are added. The expansion or contraction of the sealing pressing component, the extension and retraction of the clamping and suction component, and the switching of the end negative pressure are all controlled by the air supply of the delayed air supply holding component, and the delayed air supply of the delayed air supply holding component is controlled by the jacking of the drive ring, and the jacking of the drive ring is controlled by To insert the pipe, you only need to insert the pipe into the assembly ring groove. As the pipe is inserted to the preset depth (the side of the check block), the sealing pressure component can expand and seal against the inner ring wall of the pipe, and the adsorption block of the clamping and suction component can extend and press against the outer ring wall of the pipe while the negative pressure adsorbs the outer ring wall of the pipe. The pipe is also clamped by the clamping block itself. When disassembling, you only need to turn the threaded sleeve in the synchronous unlocking structure to the specified position and then pull out the pipe. No tools are required for disassembly and assembly of the pipe and the plug valve, and the operation is very convenient. It can adapt to pipes within a certain diameter range and has high adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an axonometric view of a quick-install sealing plug valve of the present embodiment;

[0031] Figure 2 This is a front view of a quick-install sealing plug valve of this embodiment;

[0032] Figure 3 yes Figure 2 AA cross-sectional view;

[0033] Figure 4 It is a partial cross-sectional view of a quick-install sealing plug valve of this embodiment;

[0034] Figure 5 yes Figure 4 A magnified image of A;

[0035] Figure 6 yes Figure 4 A magnified view of B;

[0036] Figure 7 yes Figure 6 Enlarged view of C;

[0037] Figure 8 It is a partial exploded view of a quick-install sealing plug valve of this embodiment.

[0038] The parts indicated by the numbers in the above figures are as follows: 1. valve cavity; 2. valve tube; 201. first matching through groove; 202. third matching through groove; 203. assembly ring groove; 3. external threaded sleeve; 301. movable through groove; 4. drive collar; 5. threaded sleeve; 6. assembly inner tube; 7. first annular airbag; 8. clamping block; 9. introduction slope; 10. guide roller; 11. valve plug; 12. air cavity; 13. first gas pipeline; 14. check block; 141. second matching through groove; 1 5. The third elastic member; 16. The connecting rod; 17. The matching block; 18. The air injection hole; 19. The second air pipeline; 20. The second annular air bag; 21. The fourth elastic member; 22. The third air pipeline; 23. The first groove; 24. The adsorption block; 25. The second piston rod; 26. The sealing block; 27. The second elastic member; 28. The driving ring; 29. ​​The air storage component; 30. The first piston rod; 31. The first elastic member; 32. The cone thorn; 321. The through groove; 33. The rubber layer; 34. The fourth matching through groove. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0040] A quick-install sealing plug valve comprises a valve body and a valve plug 11, referring to Figure 1 As shown, the valve body includes a valve cavity 1 with a valve plug 11 assembled in the middle and valve tubes 2 located at both ends of the valve cavity 1. The valve cavity 1 and the valve plug 11 are not improved. This solution only improves the assembly structure between the valve tube 2 and the pipeline to be connected.

[0041] Combination Figure 2~Figure 8As shown, an assembly inner tube 6 is extended from the inner wall of the valve tube 2 to one end away from the valve cavity 1, and an assembly ring groove 203 is formed between the valve tube 2 and the assembly inner tube 6 for inserting the pipe to be connected. A quick-install sealing module sealed with the pipe is arranged in the assembly ring groove 203, and the quick-install sealing module includes a self-centering introduction clamping component, a sealing pressing component and a delayed air supply holding component.

[0042] Combination Figure 6 , Figure 7 and Figure 8 As shown, the self-centering introduction clamping assembly includes four clamping blocks 8 uniformly distributed on the inner wall of the valve tube 2 in the circumferential direction, and four third matching through grooves 202 are evenly recessed on the valve tube 2 in the circumferential direction and allow the clamping blocks 8 to extend and retract along the radial direction of the valve tube 2. The side of the clamping block 8 facing the opening of the valve tube 2 is provided with an introduction slope 9 for the pipeline to be introduced, and a fourth elastic member 21 is also provided to drive the clamping block 8 to extend toward the inner wall of the valve tube 2, and the fourth elastic member 21 is a spring.

[0043] Combination Figure 3 and Figure 5 As shown, the sealing and pressing assembly includes a first annular airbag 7 circumferentially arranged on the outer annular wall of the assembled inner tube 6, and three annular grooves are arranged on the outer annular wall of the assembled inner tube 6 along its axial direction. A first annular airbag 7 is fixed in each annular groove. The first annular airbag 7 can expand or contract, and can evenly seal and press against the inner annular wall of the pipe after annular expansion, and retract into the annular groove after retraction.

[0044] Combination Figure 4 , Figure 6 as well as Figure 8As shown, the delayed air supply assembly includes four groups of air storage components 29 evenly spaced and fixed at the bottom of the assembly ring groove 203, a first piston rod 30 that moves in a sealed manner in the air storage component 29 and whose rod body extends toward the opening direction of the assembly ring groove 203, and a drive ring 28 that is simultaneously fixed to the rod body ends of all the first piston rods 30, a first elastic member 31 is sleeved on the first piston rod 30, and its two ends are elastically abutted against the air storage component 29 and the drive ring 28 respectively, the first elastic member 31 is a spring, and an annular air cavity 12 is built into the bottom of the assembly ring groove 203, a first air supply pipeline 13 is connected between the air cavity 12 and the first annular airbag 7, and the three first annular airbags 7 are connected through the first air supply pipeline 13, and the bottom of the piston of the first piston rod 30 is connected to the bottom of the air storage component 29 A switch assembly connected or disconnected with the air cavity 12 is arranged in between, and the switch assembly includes a conical thorn 32 with a tip facing outward protruding from the piston end of the first piston rod 30, a groove 321 opened at the bottom of the air storage component 29, and a rubber layer 33 fixed in the groove 321 and through which the conical thorn 32 can pass. Three conical thorns are arranged at intervals on the piston end of each first piston rod 30, and a fourth matching groove 34 corresponding to the rubber layer 33 and connected to the air cavity 12 is arranged at the bottom of the assembly ring groove 203. The outer wall of the conical thorn 32 is provided with a through air groove. The movement of the drive ring 28 is controlled by the insertion of the pipeline in the assembly ring groove 203. As the insertion depth of the pipeline continues to increase, the first piston rod 30 continuously compresses the air inside the air storage component 29 until the conical thorn 32 pierces the rubber layer 33.

[0045] The inner wall of the valve tube 2 is elastically extended along the radial direction of the valve tube 2 with a check block 14 that allows the drive ring 28 to pass through in one direction and limits the drive ring 28 to retreat. Figure 3 and Figure 5 As shown, four first matching through grooves 201 which are staggered with the air storage component 29 and a check block 14 which is elastically and telescopically arranged in the matching through groove are evenly spaced circumferentially on the valve tube 2. A third elastic member 15 is also provided for driving the check block 14 to partially extend into the assembly ring groove 203. The third elastic member 15 is a spring. The end of the check block 14 which is open toward the assembly ring groove 203 is provided with a guide slope for the drive ring 28 to be introduced and passed. When the drive ring 28 moves to the end (check end) of the check block 14 close to the valve cavity 1, the drive ring 28 is stationary. At this time, the cone thorn 32 pierces the rubber layer 33 and the air grooves are distributed in the air storage component 29 and the air cavity 12 at the same time. The compression space in the air storage component 29 enters the air cavity 12, and the first annular airbag 7 expands and seals and abuts with the inner ring wall of the pipeline.

[0046] In order to save effort when inserting the pipe, guide rollers 10 are respectively arranged on the introduction slope 9 of the clamping block 8 and the clamping end of the clamping block 8 to facilitate the introduction of the pipe. In order to ensure the clamping force of the clamping block 8 on the outer ring wall of the pipe after the pipe is inserted, a clamping and suction component is arranged on the clamping block 8 to absorb the outer ring wall of the pipe after the pipe is introduced. Figure 6~Figure 7 As shown, the clamping and suction assembly includes a first groove 23 recessed at the end of the guide roller 10 away from the introduction slope 9 on the clamping end of the clamping block 8, an adsorption block 24 sealingly sliding in the first groove 23 and opening toward the first groove 23, and a second piston rod 25 sealingly sliding in the adsorption block 24 and the rod body away from the opening of the first groove 23, and the end of the second piston rod 25 away from the opening of the first groove 23 is provided with a sealing block 26 sealingly slidingly matched with the first groove 23, and the end of the adsorption block 24 facing the first groove 23 is provided with an elastic layer, and an air injection hole 18 is provided on the side of the first groove 23 away from the introduction slope 9, and a second elastic member 27 is provided at the bottom of the first groove 23 with two ends elastically abutting against the sealing block 26 and the bottom of the first groove 23 respectively, and a second air supply pipeline 19 is provided on the inner wall of the valve tube 2 with two ends respectively connected to the air injection hole 18 and the air cavity 12.

[0047] A third matching through groove 202 is provided on the valve tube 2 for the extension and retraction of the clamp block 8. The end of the second air supply pipeline 19 away from the air cavity 12 is connected to the air injection hole 18. The inner wall of the third matching through groove 202 is provided with an adaptive sealing component which can always maintain the air pressure switching of the adsorption block 24 as the extension and retraction stroke of the clamp block 8 changes. The adaptive sealing component includes a second groove which is recessed on the inner wall of the third matching through groove 202 with the second air supply pipeline 19 as the center, a second annular air bag 20 which is embedded in the second groove and can be sealed with the outer wall of the clamp block 8 after expansion or gap-fitted with the clamp block 8 after contraction; and a third air supply pipeline 22 is provided between the second groove and the second air supply pipeline 19, whose two ends are respectively connected to the second annular air bag 20 and the second air supply pipeline 19.

[0048] The outer ring wall of the valve tube 2 is provided with a synchronous unlocking structure which can realize the retraction of the check block 14 to release the limit of the drive ring 28. Figure 5 and Figure 8 As shown, the synchronous unlocking structure includes a second matching through groove 141 penetratingly arranged on the check block 14, an externally threaded sleeve 3 fixed on the outside of the valve tube 2, and a threaded sleeve 5 threadedly fitted on the externally threaded sleeve 3, a driving collar 4 is coaxially rotatably arranged on one end of the threaded sleeve 5 close to the valve chamber 1, and movable through grooves 301 corresponding to the check block 14 and extending along the axial direction of the valve tube 2 are circumferentially spaced on the externally threaded sleeve 3, a connecting rod 16 is fixed on the inner ring wall of the driving collar 4 after passing through the movable through groove 301 and being located between the valve tube 2 and the externally threaded sleeve 3, a matching block 17 matching with the movable through groove 301 is fixed on the end of the connecting rod 16 away from the externally threaded sleeve 3, and an end of the matching block 17 close to the check block 14 is arranged as a matching inclined surface that drives the check block 14 to retract as it is plugged into the movable through groove 301.

[0049] The two ends of the third elastic member 15 are fixedly connected to the check block 14 and the inner ring wall of the external threaded sleeve 3 respectively, and the two ends of the fourth elastic member 21 are fixedly connected to the clamping block 8 and the inner ring wall of the external threaded sleeve 3 respectively. During the reciprocating motion, the driving ring 4 is always in a state of blocking the movable through groove 301.

[0050] When the plug valve is installed on the pipeline, the size of the pipeline only needs to be able to be inserted into the assembly ring groove 203, and it can play an adaptable role for pipelines within a certain diameter range. A self-centering introduction mechanism, a delayed air supply holding component, a sealing and pressing component, a clamping and suction component, and a synchronous unlocking structure are added. The expansion or contraction of the first annular airbag 7 in the sealing and pressing component, the extension and contraction of the adsorption block 24 in the clamping and suction component, and the switching of the end negative pressure are all controlled by the air supply of the delayed air supply holding component, and the delayed air supply of the delayed air supply holding component is controlled by the jacking of the drive ring 28, and the jacking of the drive ring 28 is controlled by the insertion of the pipeline. Therefore, it is only necessary to insert the pipeline into the assembly ring groove 203. As the pipeline is inserted When the pipe is disassembled, it is only necessary to rotate the threaded sleeve 5 in the synchronous unlocking structure to the specified position and then pull out the pipe. No tools are required for disassembly and assembly of the pipe and the plug valve, and the operation is very convenient. It can be adapted to pipes within a certain diameter range and has high adaptability. The pipe and the plug valve are matched with a floating seal and can be automatically reset after being hit. The sealing state is always maintained during the dislocation and reset process, and the sealing performance is good.

[0051] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A quick-install sealing plug valve, comprising a valve body and a valve plug (11), wherein the valve body comprises a valve chamber (1) in the middle of which the valve plug (11) is assembled, and valve tubes (2) located at both ends of the valve chamber (1), characterized in that: An assembly inner tube (6) is extended from the inner wall of the valve tube (2) toward one end away from the valve cavity (1), and an assembly ring groove (203) for assembling a pipeline is formed between the valve tube (2) and the assembly inner tube (6). A quick-assembly sealing module that is sealingly connected to the pipeline to be connected is arranged in the assembly ring groove (203), and the quick-assembly sealing module comprises: A self-centering introduction clamping assembly comprises at least three clamping blocks (8) circumferentially spaced and distributed on the inner wall of a valve tube (2); the clamping blocks (8) are provided with an introduction slope (9) for introducing a pipeline, and the clamping blocks (8) are elastically telescopically arranged along the radial direction of the valve tube (2); The sealing and pressing assembly comprises a first annular airbag (7) circumferentially arranged on the outer annular wall of the assembled inner tube (6); the first annular airbag (7) can expand or contract, and after expansion, can seal and press against the inner annular wall of the pipe; The delayed air supply holding assembly comprises a plurality of air storage components (29) fixed at circumferential intervals at the bottom of an assembly ring groove (203), a first piston rod (30) which moves in a sealed manner in the air storage component (29) and whose rod body extends in the direction of the opening of the assembly ring groove (203), and a drive ring (28) which is fixed to the rod body ends of all the first piston rods (30), an air cavity (12) is built in the bottom of the assembly ring groove (203), a first air supply pipeline (13) is connected between the air cavity (12) and a first annular air bag (7), and a gas supply pipeline (13) which is connected to the air cavity (12) is provided between the piston bottom of the first piston rod (30) and the bottom of the air storage component (29). A connecting or disconnecting on-off assembly, the on-off assembly comprising a cone thorn (32) with a tip facing outwards protruding from the piston end of a first piston rod (30), a groove (321) provided at the bottom of an air storage component (29), and a rubber layer (33) fixed in the groove (321) and allowing the cone thorn (32) to pass through, a fourth matching groove (34) corresponding to the rubber layer (33) and communicating with the air cavity (12) is provided at the bottom of the assembly ring groove (203), an outer wall of the cone thorn (32) is provided with an opposite air groove, and a check block (14) is provided on the inner wall of the valve tube (2) to elastically expand and contract along the radial direction of the valve tube (2) and to allow a driving ring (28) to pass through in one direction; The movement of the drive ring (28) is controlled by the insertion of the pipeline into the assembly ring groove (203). When the drive ring (28) moves to the end of the check block (14) close to the valve chamber (1), the drive ring (28) stops. At this time, the on-off assembly is connected, and the first annular airbag (7) expands and seals against the inner ring wall of the pipeline. Guide rollers (10) are respectively arranged on the introduction slope (9) of the clamping block (8) and the clamping end of the clamping block (8) to facilitate the introduction of the pipeline. A clamping and suction component is arranged on the clamping block (8) to absorb the outer ring wall of the pipeline after the pipeline is introduced. The clamping and suction of the clamping and suction component is controlled by the connection of the on-off component. The clamping and suction assembly comprises a first groove (23) recessed at one end of the guide roller (10) away from the introduction inclined surface (9) on the clamping end of the clamping block (8), an adsorption block (24) sealingly sliding in the first groove (23) and with its opening facing the opening of the first groove (23), and a second piston rod (25) sealingly sliding in the adsorption block (24) and with its rod body facing away from the opening of the first groove (23), a sealing block (26) sealingly slidingly cooperating with the first groove (23) is provided at one end of the second piston rod (25) away from the opening of the first groove (23), and the adsorption block (24) faces the first groove (23). An elastic layer is provided at the end of the first groove (23), an air injection hole (18) is provided on the side of the first groove (23) away from the introduction inclined surface (9), a second elastic member (27) is provided at the bottom of the first groove (23), the two ends of which are elastically abutted against the sealing block (26) and the bottom of the first groove (23), respectively, and a second air supply pipeline (19) is provided on the inner wall of the valve tube (2), the two ends of which are respectively connected to the air injection hole (18) and the air cavity (12); a third matching through groove (202) is provided on the valve tube (2) for the clamping block (8) to be extended and retracted, and the end of the second air supply pipeline (19) away from the air cavity (12) is connected to the air injection hole.

2. A quick-install sealing plug valve according to claim 1, characterized in that: A first elastic member (31) is sleeved on the first piston rod (30) and has two ends that are elastically in contact with the gas storage component (29) and the drive ring (28) respectively.

3. The quick-install sealing plug valve according to claim 1, characterized in that: A plurality of first annular air bags (7) are distributed at intervals along the axial direction of the assembly inner tube (6) and are simultaneously connected to the first air delivery pipeline (13).

4. The quick-install sealing plug valve according to claim 1, characterized in that: The inner wall of the third matching through groove (202) is provided with an adaptive sealing component capable of always maintaining the air pressure switching of the adsorption block (24) as the telescopic stroke of the clamping block (8) changes.

5. The quick-install sealing plug valve according to claim 4, characterized in that: The adaptive sealing component comprises a second groove recessed on the inner wall of the third matching through groove (202) with the second gas pipeline (19) as the center, a second annular airbag (20) embedded in the second groove and capable of sealingly fitting with the outer wall of the clamping block (8) after expansion or gap fitting with the clamping block (8) after contraction, and a third gas pipeline (22) is arranged between the second groove and the second gas pipeline (19) with its two ends respectively connected to the second annular airbag (20) and the second gas pipeline (19).

6. A quick-install sealing plug valve according to claim 5, characterized in that: A synchronous unlocking structure is provided on the outer ring wall of the valve tube (2), which can simultaneously realize the retraction of the check block (14) to release the limit on the drive ring (28).

7. A quick-install sealing plug valve according to claim 6, characterized in that: The synchronous unlocking structure comprises a second matching through groove (141) penetratingly arranged on the check block (14), an externally threaded sleeve (3) fixed outside the valve tube (2), and a threaded sleeve (5) threadedly matched on the externally threaded sleeve (3), wherein a driving collar (4) is coaxially arranged on one end of the threaded sleeve (5) close to the valve chamber (1), and movable through grooves (341) corresponding to the check block (14) and extending along the axial direction of the valve tube (2) are distributed circumferentially at intervals on the externally threaded sleeve (3). 01), a connecting rod (16) is fixed on the inner ring wall of the driving collar (4) and passes through the movable through groove (301) and is located between the valve tube (2) and the externally threaded sleeve (3); a matching block (17) matching with the movable through groove (301) is fixed on the end of the connecting rod (16) away from the externally threaded sleeve (3); and an end of the matching block (17) close to the check block (14) is arranged to form a matching inclined surface that drives the check block (14) to retract as it is plugged into the movable through groove (301).

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