CN113464761B - Quick shutoff frock of cutting off - Google Patents

Abstract

The application discloses shutoff frock cuts off fast includes: the outer peripheral surface of the plugging piece is adapted to the inner wall surface of the pipeline, and the diameter of the outer peripheral surface of the plugging piece is changed under stress; the driving shaft is connected with the plugging piece; and the driving shaft moves to drive the plugging piece to expand or contract so as to change the diameter of the plugging piece. The ball valve is provided with a plugging piece for plugging a pipeline, the plugging piece can stretch into the pipeline to plug the pipeline, and the ball valve is safely replaced under the condition that the pipeline is not stopped and depressurized.

Description

Quick shutoff frock of cutting off

Technical Field

The application relates to the technical field of pipeline gas equipment, in particular to a quick cut-off and plugging tool.

Background

The gas ball valve is an auxiliary device which is used for controlling and adjusting gas flow in the use process of gas so as to facilitate safer use of the gas, and is widely used on gas pipelines.

When the ball valve is replaced, for the sake of safety, the main switch of the gas source end needs to be closed, then the residual gas in the pipeline is replaced completely, then the ball valve to be replaced is disassembled, and after a new ball valve is replaced, the air in the pipeline is replaced by nitrogen, so that the operation is very complicated. If the pipeline is long, the replacement of the ball valve by the pipeline with more branches is more complicated, the common operation efficiency is very low, the gas discharge and stop operation brings inconvenience to the life of residents (users), and meanwhile, certain potential safety hazards also exist in the discharged combustible gas.

To above-mentioned problem, chinese utility model patent one "take gas to trade ball valve frock", application (patent) no: CN201822109137.7, including plugging device, fixed ring and drive nut; the plugging device comprises a pull rod, a top pipe and a drum-shaped rubber ring, the pull rod is inserted into the top pipe and is in threaded connection with the top pipe, an annular boss is arranged at the lower part of the pull rod, the drum-shaped rubber ring is sleeved on the pull rod, a transmission rod is fixedly connected to the top of the pull rod, and a transmission nut is sleeved on the transmission rod; two fixing plates are arranged on the outer side of the fixing ring; the fixing rings comprise a first fixing ring sleeved on a flange pipe for mounting the ball valve and a second fixing ring sleeved on the top pipe; the first fixing ring and the transmission nut are detachably connected through a first screw rod, and the first fixing ring and the second fixing ring are detachably connected through a second screw rod. When the ball valve takes place to leak outward, the utility model discloses can take the gas to change the ball valve that has the leakage under the condition that the pipeline does not stop the gas and does not step down.

The patent discloses a plugging device for the drum-shaped rubber ring completely enters the flange pipe by arranging the rubber ring on the pull rod, so that plugging is realized. However, the above occlusion device has the following problems: 1. the gas pipeline can only be adapted to the gas pipeline with the inner diameter of the ball valve being the same as the inner diameter of the flange pipe or the inner diameter of the ball valve being larger than the inner diameter of the flange pipe. If the inner diameter of the ball valve is smaller than the inner diameter of the flange pipe, the plugging device can adapt to the inner diameter of the flange pipe and can plug the flange pipe, and the ball valve cannot pass through. And the flange pipe can not be plugged by the plugging device of the ball valve. 2. The plugging device matched with the flange pipe with different inner diameters needs to be prepared, and the plugging device cannot be used universally. If the inner diameter of the flange pipe cannot be judged, the flange pipe is not easy to correspond to a proper plugging device. 3. In the process that the plugging device penetrates through the ball valve and is inserted into the flange pipe, the rubber ring can rub against the inner wall of the ball valve and the inner wall of the flange pipe, so that the rubber ring is abraded, the plugging effect is unreliable, and the service life is short.

The second Chinese utility model patent, "pipeline plugging device", applies for (patent): CN201320026983.7, discloses a device comprising an outer cylinder, an inner cylinder, an overturning leather bag, a joint and an inflation tube, wherein the top of the outer cylinder is provided with the joint, a cover plate is fixedly arranged in the cavity of the outer cylinder, the top of the outer cylinder and the cover plate are both provided with through holes, the inner cylinder penetrates through the through hole of the cover plate and is arranged in the outer cylinder, the overturning leather bag is cylindrical, the opening end of the overturning leather bag is fixedly arranged on the bottom opening of the inner cylinder, and the inflation tube penetrates through the through hole in the top of the outer cylinder and is fixedly arranged at the top of the inner cylinder and is communicated with the inner cavity of the inner cylinder; the utility model discloses a pipeline plugging device can be under the condition that no gas loss leaks, the exit ball valve of safe, convenient, swift change gas pipe network pressure regulating cabinet.

The plugging device disclosed by the second patent is inflated to push the inner barrel to move into the pipeline, and then the inner barrel is inflated with air to press the overturning leather bag to overturn into the pipeline, so that the overturning leather bag expands to compact and plug the pipeline. However, the occluder has the following problems: 1. the pushing of the whole plugging device is realized by air pressure, and the operation is inconvenient because an operator needs to inflate inwards and deflate outwards. 2. In the whole process of operating the occluder, operators are difficult to obtain state feedback from the inner barrel or the overturning leather bag. An operator cannot accurately judge whether the inner barrel moves into the pipeline or not and also cannot accurately judge whether the overturning leather bag expands to compact the pipeline or not. 3. The pipeline is used for a long time, dust, particles and the like can exist on the inner wall of the pipeline, the overturning leather bag can rub with the inner wall of the pipeline in the expanding process, the overturning leather bag is easy to wear and even break, and once the overturning leather bag is worn and broken, the plugging device is scrapped integrally, cannot be used continuously, and the overturning leather bag cannot be replaced.

Disclosure of Invention

An aim at of this application provides a shutoff frock cuts off fast, is provided with the shutoff piece that is used for the shutoff pipeline, and the shutoff piece can stretch into the pipeline in with pipeline shutoff, under the condition that the pipeline does not stop the gas and does not step down, changes the ball valve safely.

Another aim at of this application provides a cut off shutoff frock fast, but shutoff piece atress struts or contracts, and then shutoff pipeline is propped open to the shutoff piece, and the shutoff piece shrink can then pass the ball valve, stretch into or take out the pipeline.

Another aim at of this application provides a cut off shutoff frock fast, is provided with the drive shaft of being connected with the shutoff piece, and operating personnel drives the shutoff piece through the operation drive shaft and struts or shrink, and it is more simple and convenient, quick, high-efficient to operate.

Another aim at of this application provides a shutoff frock cuts off fast, is provided with the uide bushing and is used for installing the shutoff piece, ensures that the shutoff piece can strut or shrink under stable environment, ensures that the shutoff piece struts the back and evenly presses admittedly at pipeline inner wall, reaches good shutoff effect.

Another object of the application is to provide a quick shutoff frock, is provided with the uide bushing and plays the guide effect to the drive shaft for the drive shaft can move along predetermined orbit; the driving shaft moves smoothly, and jamming in the operation process is avoided.

Another aim at of this application provides a cut off shutoff frock fast, has good leakproofness between uide bushing and the shutoff piece, has good leakproofness between uide bushing and the drive shaft to make the shutoff piece prop open the back, reach good shutoff effect, the pipeline can not leak gas.

Another aim at of this application provides a shutoff frock cuts off fast, sets up a plurality of draw-in grooves on the uide bushing, sets up the card protruding on the drive shaft, and the card protruding embedding draw-in groove then drive shaft and uide bushing are relatively fixed; after the drive shaft drives the plugging piece to be propped open and the plugging is completed, the clamping protrusion can be embedded into the clamping groove, the using state of the plugging tool is temporarily fixed, and then an operator can loosen the plugging tool to replace the ball valve. The whole process of replacing the ball valve can be completed by a single operator, and the ball valve is not required to be replaced by a plurality of persons in an auxiliary mode.

Another purpose of this application is to provide a shutoff frock cuts off fast, sets up telescopic bracket and connects drive shaft and shutoff piece for stable shrink or the distraction of shutoff piece; the mechanical structure is adopted to drive the plugging piece to work, the reliability is high, and a good sealing effect can be achieved.

Another aim at of this application provides a shutoff frock cuts off fast, is provided with and accomodates the cover, and the shutoff piece of contraction state is located accomodates the cover, and this application of being convenient for removes in ball valve, pipeline, avoids shutoff piece and ball valve or pipeline to take place to interfere.

Another aim at of this application provides a shutoff frock cuts off fast, and at the removal in-process, the shutoff piece does not rub with ball valve, pipeline wall contact, and the shutoff piece can not worn and torn, has high life.

Another aim at of this application provides a cut off shutoff frock fast, and the shutoff piece is solitary structure setting, if shutoff piece surface wear, has influenced the shutoff effect, also can change the shutoff piece alone, prolongs the life of shutoff frock.

Another aim at of this application provides a cut off shutoff frock fast, is provided with the handle in the drive shaft, the operating personnel brake valve lever of being convenient for.

The technical scheme adopted by the application is as follows: the utility model provides a cut off shutoff frock fast, includes:

the outer peripheral surface of the plugging piece is adapted to the inner wall surface of the pipeline, and the diameter of the outer peripheral surface of the plugging piece is changed under stress;

the driving shaft is connected with the plugging piece; and

the driving shaft moves to drive the plugging piece to expand or contract so as to change the diameter of the plugging piece.

Compared with the prior art, the application has the advantages that the driving shaft is connected with the plugging piece, and the diameter of the plugging piece is changed by the movement of the driving shaft. Then the plugging member can pass through the ball valve and extend into the pipeline under the condition that the diameter of the outer peripheral surface of the plugging member is smaller when the plugging member is contracted due to the movement of the driving shaft. After the plugging piece enters the pipeline, the driving shaft can move to drive the plugging piece to be unfolded, and the diameter of the outer peripheral surface of the plugging piece is increased until the outer peripheral surface of the plugging piece is pressed and fixed on the inner wall surface of the pipeline. The plugging piece realizes the plugging of the pipeline, so that the ball valve is safely replaced under the condition that the pipeline is not stopped and depressurized. This application drives the shutoff piece through the motion of driving piece and struts or contracts, and mechanical structure's transmission makes whole operation process simple and convenient more, quick, high-efficient.

In some embodiments of this application, the shutoff piece be umbelliform structure, the shutoff piece connect telescopic bracket, the drive shaft pass through telescopic bracket and be connected with the shutoff piece, the drive shaft motion drives telescopic bracket work and struts or shrink shutoff piece.

Specifically, the blocking piece, the telescopic bracket and the driving shaft form a structure with a basic structure of an umbrella. Under the condition that the plugging piece is contracted, the plugging piece and the telescopic support extend into the pipeline, and the driving shaft works to drive the telescopic support to work to open the plugging piece. The pipeline is plugged by the opened plugging piece, and the ball valve can be replaced. After the ball valve is replaced, the driving shaft drives the shrinkage support to work to shrink the plugging piece, and the plugging piece in a shrinkage state can be drawn out from the pipeline.

In some embodiments of the present application, a guide sleeve is provided, and the plugging member is sleeved outside the guide sleeve. The guide sleeve is used for installing the plugging piece, the inner ring of the plugging piece is fixed on the guide sleeve, the outer ring of the plugging piece can move within a preset range, and the movement stability of the plugging piece is higher.

In some embodiments of the present application, one end of the drive shaft is located within a guide sleeve, within which the drive shaft is axially movable. The driving shaft is coaxial with the guide sleeve. The setting of uide bushing also can make the shutoff piece be difficult to the axis of skew pipeline, ensures that the shutoff piece struts the back and evenly presses admittedly at the pipeline inner wall, reaches good shutoff effect.

In some embodiments of the present application, the guide sleeve is provided with at least one guide hole, the driving shaft is connected with a connecting rod, and the connecting rod passes through the guide hole and is connected with the blocking piece. The movement of the drive shaft is transmitted to the closure via the connecting rod.

In some embodiments of the present application, the guide hole has a kidney shape, and the guide hole restricts the connecting rod from reciprocating only along the length direction of the guide hole.

Specifically, the length direction of the guide hole is parallel to the axial direction of the drive shaft. It can also be said that the length direction of the guide hole is parallel to the axial direction of the guide sleeve. The arrangement of the guide hole can not only enable the connecting rod to extend out to transmit the motion of the driving shaft to the outside of the guide sleeve, but also can reversely play a role in limiting the moving track of the driving shaft, so that the driving shaft can only move in the limited path of the guide hole.

In some embodiments of the present application, the outer wall of the driving shaft in the guide sleeve is attached to the inner wall of the guide sleeve, and the gas cannot pass through between the guide sleeve and the driving shaft. Specifically, the connection between the guide sleeve and the driving shaft is hard seal.

In some embodiments of the present application, the guide sleeve is made of a metal material, and the driving shaft is made of a metal material. Preferably, the guide sleeve and the driving shaft are formed by hard metal, so that the wear resistance of the guide sleeve and the driving shaft is effectively enhanced, and the hard seal of the contact connection of the guide sleeve and the driving shaft is reliable.

In some embodiments of the present application, the guide sleeve includes a first sleeve member and a second sleeve member, the first sleeve member and the second sleeve member being coaxially coupled.

The first sleeve piece extends into the pipeline, the second sleeve piece is partially exposed outside the pipeline and the ball valve, and one end of the driving shaft penetrates through the second sleeve piece and then extends into the first sleeve piece.

The outer wall of the driving shaft is attached to the inner wall of the first sleeve, and gas cannot pass through the space between the first sleeve and the driving shaft. The cost of this application can be reduced to above-mentioned structure setting.

The tool is used for penetrating through the ball valve and extending into the pipeline, and the structural length of the tool is longer, namely the axial lengths of the guide sleeve and the driving shaft are larger; meanwhile, hard sealing is needed between the guide sleeve and the driving shaft, and the guide sleeve and the driving shaft need to be produced and processed by hard metal materials. The material cost of the entire product rises. The inventor of the present application designs the guide sleeve as a first sleeve, a second sleeve, the first sleeve being a structural member extending into the pipe and connected to the drive shaft to form a sealing surface, and the present application preferably uses a metal material, such as iron. In order to reduce the cost of the product, the second sleeve is preferably molded by plastic.

In some embodiments of the present application, the basic shape of the plug is cylindrical, and the cross section of the plug in the axial direction is trapezoidal.

In some embodiments of the present application, the blocking member includes a ring member and a mounting member, the mounting member is disposed at an inner ring of the ring member, and the mounting member is connected to the guide sleeve.

In some embodiments of the present application, the outer circumferential surface of the guide sleeve is provided with a mounting seat, and the mounting seat is a circular ring-shaped sheet structure.

The basic shape of the mounting part is a circular ring. The side face of the mounting piece is attached to the mounting seat, and the inner wall face of the mounting piece is attached to the outer peripheral face of the guide sleeve. The installed part can realize sealedly with being connected of uide bushing, avoids the gas leakage in the pipeline.

The cross section of installed part be L shape, uide bushing periphery cover be equipped with sealed clamping ring, sealed clamping ring press admittedly on the installed part. Sealing clamping ring has good sealing performance with being connected of uide bushing, and sealing clamping ring has good sealing performance with being connected of installed part, and sealing clamping ring further improves the sealing performance after this application shutoff.

So far, this application has realized that the stable installation of shutoff piece has good sealing performance in the uide bushing periphery, and the connection between shutoff piece and the uide bushing has moreover, and gaseous can't pass through from here, and supplementary shutoff piece is with the pipeline shutoff.

In some embodiments of the present application, the blocking member further includes a connecting member, and the connecting member is disposed on an inner wall surface of the outer ring of the ring member. The connecting piece be used for with telescopic bracket connection, telescopic bracket application of force can be with the outside distraction of ring member outer lane side.

The ring piece comprises an outer ring and an inner ring, the inner ring is the position with the smallest diameter in the ring piece in a non-contraction state, and the outer ring is the position with the largest diameter in the ring piece in the non-contraction state.

In some embodiments of the present application, the inner wall surface of the outer ring of the ring is provided with a connecting member, and the outer wall surface of the outer ring of the ring is adapted to the inner wall surface structure of the pipe fitting. Specifically, the outer wall surface of the outer ring is parallel to the inner wall surface of the pipe fitting. After the ring piece is opened, the outer wall surface of the outer ring can be attached to the inner wall surface of the pipe fitting, and the plugging effect is good.

In some embodiments of the present application, including telescopic bracket, the drive shaft be connected with telescopic bracket, telescopic bracket is connected with the shutoff piece, the drive shaft remove to drive telescopic bracket struts or shrink shutoff piece.

In some embodiments of the present application, the telescopic bracket includes a plurality of struts, and the plurality of struts are regularly arranged and connected with the blocking member. The projections of the struts onto the plane of the connecting elements are arranged in the radial direction of the blocking element.

Specifically, the included angles of the projections of the two adjacent support rods on the plane where the connecting piece is located are equal. That is to say, a plurality of branch regular and even with the shutoff piece be connected to when drive shutoff piece, the atress of shutoff piece is even, and the shutoff piece can be stable, reliable struts or shrink.

In some embodiments of the present application, the supporting rod is connected to a connecting member, the connecting member includes a plurality of sheet-like members uniformly disposed on an inner wall surface of the outer ring of the ring member, and the sheet-like members have a substantially circular arc shape. The telescopic bracket can apply force to the connecting piece, and then the connecting piece pushes the ring piece to be uniformly spread outwards. The plurality of sheets are located in the same plane. I.e. the force applied by the flaps to the ring is in the radial direction in which they are located, which is good for pushing the ring outwards.

In some embodiments of the present application, the telescoping support is located on a side of the ring away from the inner race. Therefore, when the plugging piece is pushed by the support rod, the force of the support rod applied to the plugging piece is along the moving direction of the outer ring of the plugging piece expanding or contracting. Make branch can strut smoothly or shrink the shutoff piece, avoid taking place the card in whole motion and pause, lead to the shutoff piece to strut not in place, and then lead to the shutoff of pipeline to become invalid.

In some embodiments of the present application, the connecting member is provided with a joint, specifically, the sheet member is provided with a joint, and one end of the supporting rod is rotatably connected with the joint.

In some embodiments of the present application, the telescopic bracket includes a sliding ring, the sliding ring is sleeved outside the guiding sleeve, and the sliding ring is forced to move back and forth along the axial direction of the guiding sleeve. The other end of the supporting rod is rotatably connected with the sliding ring, and the sliding ring moves to drive the supporting rod to expand or contract the plugging piece. The driving shaft is connected with a slip ring in the telescopic bracket.

In some embodiments of the present application, the slip ring is connected with six struts, that is, the telescopic bracket comprises six struts, which is a preferred structure of the present application. The plugging piece can be guaranteed to move stably, and the integral structure of the plugging piece is kept simple.

In some embodiments of the present application, three connecting rods are disposed on the driving shaft, three guiding holes are correspondingly disposed on the guiding sleeve, and the connecting rods penetrate through the guiding holes and are connected with the sliding ring. The included angle between two adjacent connecting rods is 120 degrees, and the stress of the slip ring is uniform. A plane is determined by the three points, the three connecting rods can ensure that the motion of the sliding ring is stable and reliable, and the sliding ring moves along a preset motion track, so that the blocking piece is pushed to be stably unfolded or contracted.

In some embodiments of the application, the guide sleeve is sleeved with a storage sleeve, the storage sleeve is of a cylindrical structure, and the storage sleeve is located on one side, close to the inner ring, of the plugging piece. The storage sleeve is connected with the driving shaft, and the driving shaft moves to drive the storage sleeve to move along the axial direction of the guide sleeve.

Specifically, when the driving shaft moves in the pipeline, the telescopic bracket and the accommodating sleeve move in the same direction. At the moment, the movement of the shrinkage support drives the plugging piece to shrink, and the storage sleeve moves to be sleeved outside the plugging piece in a shrinkage state. Accomodate the cover and further ensure that the shutoff piece of shrink state can not strut at will, be convenient for this application removes in the pipeline. The plugging piece in the storage sleeve does not rub with the pipeline wall, the storage sleeve plays a role in protecting the plugging piece, and the service life of the plugging piece is effectively prolonged.

When the driving shaft moves towards the outside of the pipeline, the telescopic bracket and the containing sleeve move towards the same direction. At this time, the movement of the containing sleeve will open the plugging piece, and the movement of the shrinkage support will drive the plugging piece to expand. When the plugging piece is arranged, a certain distance is preferably arranged between the storage sleeve and the plugging piece, and the plugging piece is wrapped by the storage sleeve after the storage sleeve is contracted; after the storage sleeve is separated from the plugging piece, the plugging piece is unfolded, and interference is avoided.

In some embodiments of the present application, the driving shaft is connected to the receiving sleeve through a shaft pin, and the guide sleeve is provided with a waist-shaped hole for the shaft pin to pass through. The waist-shaped holes and the shaft pins are arranged to limit the driving shaft, so that the driving shaft can only move back and forth along the axial direction, and the deviation of the driving shaft is avoided.

In some embodiments of the present application, the other end of the driving shaft is located outside the guiding sleeve, and a handle is disposed on the other end of the driving shaft. The operator drives the driving shaft to move by applying force to the handle.

In some embodiments of the present application, the driving shaft is provided with a locking protrusion, the second sleeve is provided with a plurality of locking grooves corresponding to the locking protrusion, and the second sleeve is rotatable around the first sleeve. After the drive shaft moved to suitable position, rotatory second external member for the card is protruding to be embedded into the draw-in groove, and the drive shaft is limited in the ascending position of axial this moment, and the drive shaft no longer moves, and the state of this application is locked. By suitable location is meant that the drive shaft or the bracing seal achieves sealing or the contracting seal is movable within the pipe.

In this application, set up the uide bushing as first external member, second external member, except that the cost is considered, still have the effect of this application operating condition of locking. The first sleeve is provided with a guide hole, a waist-shaped hole and other structures, and a connecting rod and a bolt correspondingly penetrate through the guide hole and the waist-shaped hole, so that the first sleeve and the driving shaft are limited to move axially only. This application sets up the second external member then and is rotatable around first external member, carries on spacingly through the axial position of rotatory second external member to the drive shaft to liberation operating personnel's both hands, operating personnel can vacate both hands from this application and go to change the ball valve. This application has effectively improved operating personnel's work efficiency for single ball valve change work of accomplishing does not need the cooperation of other personnel.

Drawings

The present application will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of the present application;

FIG. 2 is a cross-sectional view of the present application;

FIG. 3 is an enlarged fragmentary view of a portion of the first kit of FIG. 2;

FIG. 4 is an enlarged fragmentary view of a portion of the first kit;

FIG. 5 is an enlarged view of a portion of the snap projection.

Wherein the reference numerals are specified as follows: 1. a blocking member; 11. a ring member; 11a, an inner ring; 11b, an outer ring; 12. a connecting member; 13. a mounting member; 2. a drive shaft; 3. a guide sleeve; 31. a first kit; 311. a guide hole; 312. a waist-shaped hole; 32. a second kit; 4. a telescopic bracket; 41. a strut; 42. a slip ring; 5. a storage sleeve; 6. sealing the pressure ring; 7. a mounting base; 8. a handle; 9. clamping convex; 10. a clamping groove.

Detailed Description

The present application will now be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

As shown in fig. 1 to 5: the utility model provides a shutoff frock cuts off fast, its embodiment one includes: the outer peripheral surface of the plugging piece 1 is adapted to the inner wall surface of the pipeline, and the diameter of the outer peripheral surface is changed under stress; the driving shaft 2 is connected with the plugging member 1; and the movement of the driving shaft 2 drives the plugging piece 1 to be expanded or contracted so as to change the diameter of the plugging piece 1. Then the block piece 1 can be passed through the ball valve and into the pipeline with the block piece 1 in the condition that the diameter of the outer peripheral surface is small when the block piece 1 is contracted by the movement of the drive shaft 2. After the plugging piece 1 enters the pipeline, the driving shaft 2 can move to drive the plugging piece 1 to be opened, and the diameter of the outer peripheral surface of the plugging piece 1 is enlarged until the outer peripheral surface of the plugging piece 1 is pressed and fixed on the inner wall surface of the pipeline. The plugging piece 1 realizes plugging of the pipeline, so that the ball valve is safely replaced under the condition that the pipeline is not stopped and depressurized. This application drives shutoff piece 1 through the motion of driving piece and struts or contract, and mechanical structure's transmission makes whole operation process simple and convenient more, quick, high-efficient.

The application further prefers to be provided with a guide sleeve 3, and the plugging piece 1 is sleeved outside the guide sleeve 3. The guide sleeve 3 is arranged for installing the plugging piece 1, the inner ring 11a of the plugging piece 1 is fixed on the guide sleeve 3, the outer ring 11b of the plugging piece 1 can move within a preset range, and the movement stability of the plugging piece 1 is higher.

One end of the driving shaft 2 is positioned in the guide sleeve 3, and the driving shaft 2 can move along the axial direction of the guide sleeve 3. The drive shaft 2 is coaxial with the guide sleeve 3. The setting of uide bushing 3 also can make the axis of shutoff piece 1 be difficult to the skew pipeline, ensures that shutoff piece 1 struts the back and evenly presses admittedly at the pipeline inner wall, reaches good shutoff effect.

As shown in fig. 3, at least one guide hole 311 is opened on the guide sleeve 3, the driving shaft 2 is connected with a connecting rod, and the connecting rod passes through the guide hole 311 and is connected with the blocking piece 1. The movement of the drive shaft 2 is transmitted to the block piece 1 via a connecting rod. The guide hole 311 is kidney-shaped, and the guide hole 311 limits the link rod to reciprocate only along the length direction of the guide hole 311. Specifically, the longitudinal direction of the guide hole 311 is parallel to the axial direction of the drive shaft 2. It can also be said that the longitudinal direction of the guide hole 311 is parallel to the axial direction of the guide sleeve 3. The guide hole 311 is provided to extend the link rod to transmit the movement of the driving shaft 2 to the outside of the guide sleeve 3, and to reversely limit the moving track of the driving shaft 2, so that the driving shaft 2 can only move within the limited distance of the guide hole 311.

The outer wall of the driving shaft 2 in the guide sleeve 3 is attached to the inner wall of the guide sleeve 3, and gas cannot pass through the guide sleeve 3 and the driving shaft 2. Specifically, the connection between the guide sleeve 3 and the driving shaft 2 is hard seal. The guide sleeve 3 is made of metal materials, and the driving shaft 2 is made of metal materials. Preferably, the guide sleeve 3 and the driving shaft 2 are formed by hard metal, so that the wear resistance of the guide sleeve 3 and the driving shaft 2 is effectively enhanced, and the hard seal of the contact connection between the guide sleeve 3 and the driving shaft 2 is reliable.

The guide sleeve 3 comprises a first sleeve part 31 and a second sleeve part 32, and the first sleeve part 31 and the second sleeve part 32 are coaxially connected. The first sleeve 31 extends into the pipeline, the second sleeve 32 is partially exposed out of the pipeline and the ball valve, and one end of the driving shaft 2 extends into the first sleeve 31 after penetrating through the second sleeve 32. The outer wall of the driving shaft 2 is attached to the inner wall of the first sleeve 31, so that gas cannot pass through the space between the first sleeve 31 and the driving shaft 2. The cost of this application can be reduced to above-mentioned structure setting.

As a tool which needs to penetrate through the ball valve and extend into the pipeline, the structural length of the tool is longer, namely the axial lengths of the guide sleeve 3 and the driving shaft 2 are larger; meanwhile, in order to realize hard sealing between the guide sleeve 3 and the driving shaft 2, the guide sleeve 3 and the driving shaft 2 need to be produced and processed by using hard metal materials. The material cost of the entire product rises. The inventor of the present application has designed the guide sleeve 3 as a first sleeve member 31, a second sleeve member 32, the first sleeve member 31 being a structural member extending into the pipe and being connected to the drive shaft 2 to form a sealing surface, and the present application is preferably made of a metal material, such as iron. In order to reduce the cost of the product, the second sleeve member 32 is preferably molded from plastic.

As shown in fig. 3, the basic shape of the block piece 1 is cylindrical, and the cross section of the block piece 1 in the axial direction is trapezoidal. The blocking piece 1 comprises a ring piece 11 and a mounting piece 13, the mounting piece 13 is arranged on an inner ring 11a of the ring piece 11, and the mounting piece 13 is connected with the guide sleeve 3.

The outer peripheral surface of the guide sleeve 3 is provided with a mounting seat 7, and the mounting seat 7 is of a circular ring sheet structure. The mounting member 13 is substantially circular in shape. The side surface of the mounting piece 13 is attached to the mounting base 7, and the inner wall surface of the mounting piece 13 is attached to the outer peripheral surface of the guide sleeve 3. The connection of the mounting part 13 and the guide sleeve 3 can realize sealing, and gas leakage in the pipeline is avoided.

The cross section of installed part 13 be L shape, 3 periphery covers of uide bushing be equipped with sealed clamping ring 6, sealed clamping ring 6 press firmly on installed part 13. Sealed clamping ring 6 has good sealing performance with being connected of uide bushing 3, and sealed clamping ring 6 has good sealing performance with being connected of installed part 13, and sealed clamping ring 6 further improves the sealing performance after this application shutoff.

So far, this application has realized that shutoff piece 1 is stable installs in 3 peripheries of uide bushing, and the connection between shutoff piece 1 and the uide bushing 3 has good sealing performance moreover, and gaseous can't pass through from here, supplementary shutoff piece 1 is with the pipeline shutoff.

The plugging member 1 further comprises a connecting piece 12, and the connecting piece 12 is arranged on the inner wall surface of the outer ring 11b of the ring 11. The connecting piece 12 is used for connecting with the telescopic bracket 4, and the telescopic bracket 4 can be used for expanding the outer ring 11b side of the ring 11 outwards by applying force.

The ring 11 comprises an outer ring 11b and an inner ring 11a, the inner ring 11a is the position with the smallest diameter in the ring 11 in a non-contraction state, and the outer ring 11b is the position with the largest diameter in the ring 11 in the non-contraction state.

The inner wall surface of the outer ring 11b of the ring 11 is provided with a connecting piece 12, and the outer wall surface of the outer ring 11b of the ring 11 is matched with the structure of the inner wall surface of the pipe fitting. Specifically, the outer wall surface of the outer ring 11b is parallel to the inner wall surface of the pipe. After the ring piece 11 is expanded, the outer wall surface of the outer ring 11b can be attached to the inner wall surface of the pipe fitting, and the plugging effect is good.

This application still includes telescopic bracket 4, drive shaft 2 be connected with telescopic bracket 4, telescopic bracket 4 is connected with shutoff piece 1, 2 removal of drive shaft drive telescopic bracket 4 strut or shrink shutoff piece 1. The telescopic bracket 4 comprises a plurality of supporting rods 41, and the plurality of supporting rods 41 are regularly arranged and connected with the plugging piece 1. The projections of the struts 41 onto the plane of the connecting elements 12 are arranged in the radial direction of the block piece 1.

Specifically, the projection angles of two adjacent struts 41 on the plane of the connecting piece 12 are equal. That is, the plurality of struts 41 are regularly and uniformly connected to the block piece 1, so that when the block piece 1 is driven, the force applied to the block piece 1 is uniform, and the block piece 1 can be expanded or contracted stably and reliably.

The supporting rod 41 is connected with the connecting piece 12, the connecting piece 12 comprises a plurality of sheet-shaped pieces which are uniformly arranged on the inner wall surface of the outer ring 11b of the ring piece 11, and the basic shape of the sheet-shaped pieces is circular arc. The telescopic bracket 4 applies force to the connecting piece 12, and then the ring piece 11 is pushed by the connecting piece 12 to be uniformly spread outwards. The plurality of sheets are located in the same plane. I.e. the force applied by the flaps to the ring 11 is in the radial direction in which they are located, and is good at pushing the ring 11 outwards. The telescopic bracket 4 is positioned on one side of the ring piece 11 far away from the inner ring 11 a. Thus, when the rod 41 pushes the closure 1, the force of the rod 41 applied to the closure 1 is in the direction of movement of the outer ring 11b of the closure 1 to expand or contract. So that the supporting rod 41 can smoothly expand or contract the plugging member 1, and the blockage caused by the blockage in the whole movement is avoided, so that the plugging member 1 is not expanded in place, and the plugging of the pipeline is disabled. The connecting piece 12 is provided with a joint, specifically, the sheet piece is provided with a joint, and one end of the support rod 41 is rotatably connected with the joint.

The telescopic support 4 comprises a sliding ring 42, the sliding ring 42 is sleeved outside the guide sleeve 3, and the sliding ring 42 is stressed to move back and forth along the axial direction of the guide sleeve 3. The other end of the supporting rod 41 is rotatably connected with a sliding ring 42, and the sliding ring 42 moves to drive the supporting rod 41 to expand or contract the plugging piece 1. The drive shaft 2 is connected to a slide ring 42 in the telescopic support 4. Six struts 41 are connected to the slip ring 42, that is, the telescopic bracket 4 comprises six struts 41, which is a preferred structure of the present application. Not only can ensure the stable movement of the plugging piece 1, but also can keep the whole structure of the application simple.

The driving shaft 2 is provided with three connecting rods, the guide sleeve 3 is correspondingly provided with three guide holes 311, and the connecting rods penetrate out of the guide holes 311 and are connected with the sliding ring 42. Specifically, the included angle between two adjacent connecting rods is 120 degrees, and the slip ring 42 is uniformly stressed. Three points determine a plane, the three connecting rods can ensure that the movement of the sliding ring 42 is stable and reliable, and the sliding ring 42 moves along a preset movement track, so as to push the blocking piece 1 to be stably expanded or contracted.

The guide sleeve 3 is externally sleeved with a containing sleeve 5, the containing sleeve 5 is of a cylindrical structure, and the containing sleeve 5 is positioned on one side, close to the inner ring 11a, of the plugging piece 1. Accomodate cover 5 be connected with drive shaft 2, drive shaft 2 removes and drives accomodate cover 5 along the axial displacement of uide bushing 3. Specifically, when the drive shaft 2 moves into the duct, the telescopic bracket 4 and the storage sleeve 5 move in the same direction. At this time, the movement of the contracting bracket drives the plugging member 1 to contract, and the movement of the storage sleeve 5 covers the plugging member 1 in the contracted state. The storage sleeve 5 further ensures that the plugging piece 1 in the contraction state cannot be randomly propped open, so that the pipe plugging device is convenient to move in the pipe. The plugging piece 1 positioned in the storage sleeve 5 does not rub against the pipeline wall, the storage sleeve 5 protects the plugging piece 1, and the service life of the plugging piece 1 is effectively prolonged. When the drive shaft 2 moves outward of the duct, the telescopic bracket 4 and the storage sleeve 5 move in the same direction. At this time, the movement of the storage sleeve 5 releases the closure 1, and the movement of the shrink holder drives the closure 1 to be opened. When the plugging piece is arranged, a certain distance is preferably reserved between the accommodating sleeve 5 and the plugging piece 1, and the accommodating sleeve 5 is ensured to wrap the plugging piece 1 after the accommodating sleeve 5 is contracted; after the storage sleeve 5 is separated from the plugging piece 1, the plugging piece 1 is unfolded to avoid interference.

The driving shaft 2 is connected with the containing sleeve 5 through a shaft pin, and the guide sleeve 3 is provided with a waist-shaped hole 312 for the shaft pin to pass through. The waist-shaped hole 312 and the shaft pin are arranged to limit the driving shaft 2, so that the driving shaft 2 can only move back and forth along the axial direction, and the deviation of the driving shaft 2 is avoided.

As shown in fig. 5, the other end of the driving shaft 2 is located outside the guide sleeve 3, and a handle 8 is arranged on the other end of the driving shaft 2. The operator moves the drive shaft 2 by applying a force to the handle 8.

As shown in fig. 5, the driving shaft 2 is provided with a locking protrusion 9, the second sleeve 32 is provided with a plurality of locking slots 10 corresponding to the locking protrusion 9, and the second sleeve 32 is rotatable around the first sleeve 31. After the drive shaft 2 has been moved into position, the second sleeve part 32 is rotated so that the detent projections 9 engage in the detent grooves 10, the position of the drive shaft 2 in the axial direction being defined, the drive shaft 2 no longer moving and the state of the application being locked. Suitable positions are those in which the drive shaft 2 either props the closure 1 to effect closure or the constriction 1 is movable within the pipeline.

In the present application, the guide sleeve 3 is provided as a first sleeve 31 and a second sleeve 32, which, in addition to cost considerations, also has the effect of locking the working state of the present application. The first sleeve 31 is provided with a guide hole 311, a kidney-shaped hole 312 and the like, and a corresponding connecting rod and a corresponding bolt pass through the guide hole and the kidney-shaped hole, so that only axial movement between the first sleeve 31 and the driving shaft 2 is limited. Then this application sets up second external member 32 rotatable around first external member 31, and is spacing the axial position of drive shaft 2 through rotatory second external member 32 to liberation operating personnel's both hands, operating personnel can vacate both hands from this application and go to change the ball valve. This application has effectively improved operating personnel's work efficiency for single ball valve change work of accomplishing does not need the cooperation of other personnel.

The second embodiment of the present application is the same as the first embodiment in other respects, and is different in that: the plugging piece 1 is of an umbrella-shaped structure, the plugging piece 1 is connected with the telescopic support 4, the driving shaft 2 is connected with the plugging piece 1 through the telescopic support 4, and the driving shaft 2 moves to drive the telescopic support 4 to work and unfold or retract the plugging piece 1.

Specifically, the plugging piece 1, the telescopic bracket 4 and the driving shaft 2 form a structure with a basic structure of an umbrella. Under the shutoff piece 1 shrink state, in shutoff piece 1, telescopic bracket 4 stretched into the pipeline, drive shaft 2 work drove telescopic bracket 4 work and struts shutoff piece 1. The pipeline is plugged by the opened plugging piece 1.

The present application has been described in detail above, and specific examples thereof are used herein to explain the principles and implementations of the present application, which are presented solely to aid in understanding the present application and its core concepts. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims (6)

1. The utility model provides a cut off shutoff frock fast which characterized in that includes:

the outer peripheral surface of the plugging piece (1) is adapted to the inner wall surface of the pipeline, and the diameter of the outer peripheral surface of the plugging piece is changed under stress; the section of the plugging piece (1) along the axial direction is trapezoidal;

the driving shaft (2) is connected with the plugging piece (1); the driving shaft (2) moves to drive the plugging piece (1) to expand or contract so as to change the diameter of the plugging piece (1);

the sealing device comprises a guide sleeve (3), wherein the sealing piece (1) is sleeved outside the guide sleeve (3), one end of a driving shaft (2) is positioned in the guide sleeve (3), and the driving shaft (2) can move along the axial direction of the driving shaft in the guide sleeve (3);

the driving shaft (2) is connected with the telescopic bracket (4), and the telescopic bracket (4) is connected with the plugging piece (1);

the driving shaft (2) moves to drive the telescopic bracket (4) to expand or contract the plugging piece (1); the plugging piece (1) comprises a ring piece (11) and a mounting piece (13), the mounting piece (13) is arranged on an inner ring (11 a) of the ring piece (11), the mounting piece (13) is connected with the guide sleeve (3), and the telescopic bracket (4) is positioned on one side, far away from the inner ring (11 a), of the ring piece (11); the sealing device is characterized in that a containing sleeve (5) is sleeved outside the guide sleeve (3), the containing sleeve (5) is of a cylindrical structure, the containing sleeve (5) is located on one side, close to the inner ring (11 a), of the sealing piece (1), the containing sleeve (5) is connected with the driving shaft (2), and the driving shaft (2) moves to drive the containing sleeve (5) to move axially along the guide sleeve (3).

2. The quick shutoff frock of cutting off of claim 1, characterized in that, the outer peripheral face of uide bushing (3) be provided with mount pad (7), installed part (13) side paste and lean on mount pad (7), the internal face and the laminating of uide bushing (3) outer peripheral face of installed part (13), uide bushing (3) outer peripheral cover be equipped with sealed clamping ring (6), sealed clamping ring (6) press admittedly on installed part (13).

3. The quick cut-off and plugging tool according to claim 1, wherein the plugging member (1) further comprises a connecting member (12), the connecting member (12) is arranged on the inner wall surface of the outer ring (11 b) of the ring member (11), the connecting member (12) comprises a plurality of sheet-shaped members uniformly arranged on the inner wall surface of the outer ring (11 b) of the ring member (11), and joints are arranged on the sheet-shaped members.

4. A quick cut-off plugging tool according to claim 3, wherein said telescopic bracket (4) comprises a plurality of supporting rods (41), said plurality of supporting rods (41) are regularly arranged and connected with said plugging member (1), the projection of said supporting rods (41) on the plane of said connecting member (12) is arranged along the radial direction of said plugging member (1), and one end of said supporting rods (41) is rotatably connected with said connector.

5. The quick cut-off and plugging tool according to claim 4, wherein the telescopic support (4) comprises a sliding ring (42), the sliding ring (42) is sleeved outside the guide sleeve (3), the sliding ring (42) is stressed to move back and forth along the axial direction of the guide sleeve (3), the other end of the support rod (41) is rotatably connected with the sliding ring (42), the sliding ring (42) moves to drive the support rod (41) to unfold or retract the plugging piece (1), and the driving shaft (2) is connected with the sliding ring (42) in the telescopic support (4).

6. The quick shutoff frock of claim 1, characterized in that uide bushing (3) include first external member (31) and second external member (32), first external member (31) and second external member (32) coaxial coupling, first external member (31) stretch into in the pipeline, the one end of drive shaft (2) stretch into in the first external member after passing second external member (32), drive shaft (2) on be provided with card protruding (9), second external member (32) correspond card protruding (9) and be provided with a plurality of draw-in grooves (10), second external member (32) rotatable around first external member (31).

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