CN113949022B - Pipeline busbar and bellows expansion joint for pipeline busbar - Google Patents

Abstract

The invention relates to a pipeline busbar and a bellows expansion joint for the pipeline busbar, comprising: two busbar cylinders arranged at intervals along the left and right directions, and connecting flanges are provided at the opposite ends of the two busbar cylinders; the bellows expansion joint includes: The main body of the corrugated pipe, the right end of the bellows main body is provided with a static end flange, and the left end is provided with a movable end flange; at least two adjustment rods, each extending along the left and right directions, and the left end of each adjustment rod and the movable end flange are on the left and right direction, and the right end is fixedly assembled with the static end flange; in the circumferential direction of the bellows main body, any two adjacent nut structures are connected through a synchronous transmission structure to realize the synchronous rotation of all nut structures. When each nut structure rotates forward synchronously, each nut structure moves to the right synchronously to compress the main body of the bellows synchronously; when each nut structure synchronously reverses, each nut structure moves to the left to synchronously release the main body of the bellows; The operator drives all nut structures to rotate synchronously.

Description

Pipeline busbar and bellows expansion joint for pipeline busbar

technical field

The invention relates to a pipeline busbar and a bellows expansion joint for the pipeline busbar.

Background technique

Due to changes in ambient temperature, temperature rise during power-on, sunlight, wind, and morning and evening radiation cooling of the pipeline busbars of GIS and GIL in operation, the temperature of the pipeline busbar itself changes and expands with heat and contracts with cold. If the displacement caused by thermal expansion and contraction is not limited and absorbed accordingly, when the amount of expansion and contraction is large, it will cause GIS equipment support breakage, interval displacement, and even cause equipment damage such as pipeline busbar cracking. On the other hand, the pipeline busbars of GIS and GIL are hard-connected, and the conductive part is enclosed inside the pipeline. Once a failure occurs, it needs to be dismantled for repair or replacement. If there is no retractable structure, partial disassembly of the faulty section will not be possible, and the overall disassembly will result in extremely high maintenance costs. . Therefore, usually in the case of a long pipeline busbar, a bellows expansion joint is set at a certain length or a certain interval to compensate for the displacement change of the pipeline busbar due to thermal expansion and contraction, installation errors, etc., and to compress the bellows In order to achieve the purpose of dismantling or overhauling the faulty section.

For example, the bus bar system and its spare connecting device disclosed in the Chinese invention patent whose authorized announcement number is CN110323822B include a bellows, and a flange is provided at each end of the bellows, and the two flanges are respectively used to connect with the two sides of the bellows. Bus barrel connection, there are two connecting screws between the two flanges, the two connecting screws are arranged symmetrically with respect to the central axis of the bellows, the two ends of each connecting screw are respectively inserted on the two flanges, and are limited by lock nuts. Position, by rotating each lock nut to adjust the distance between the two flanges, and then compress the bellows to a certain size to meet the internal conductor and bus bar removal work space.

However, when compressing the above-mentioned bellows, in order to make the bellows, flange, connecting screw and lock nut evenly stressed during the process without deformation and damage, usually at least two people are required to operate each lock nut at the same time, which is a waste of manpower. ; or a single person adjusts each locking nut symmetrically and slowly one by one, the steps are cumbersome, time-consuming and laborious, the work efficiency is not high, and it is impossible to ensure that the locking nuts move synchronously along the bellows axial direction, therefore, the bellows is unbalanced, easy to damage.

Contents of the invention

The purpose of the present invention is to provide a bellows telescopic joint for pipeline busbars to solve the technical problem in the prior art that each lock nut of the busbar connection device moves one by one, resulting in uneven stress on the bellows and easy damage. The present invention also provides a pipeline busbar to solve the technical problem in the prior art that each adjusting nut of the busbar connection device between the pipeline busbars moves one by one, resulting in uneven force on the bellows and easy damage.

In order to achieve the above purpose, the technical solution of the bellows expansion joint for pipeline bus provided by the present invention is: a bellows expansion joint for pipeline bus, comprising:

The main body of the bellows extends along the left and right directions. The right end of the bellows main body is provided with a static end flange, and the left end is provided with a moving end flange. The bus bar barrel connection on both sides;

At least two adjusting rods, each extending along the left and right directions, the left end of each adjusting rod is slidably assembled with the moving end flange in the left and right direction, and the right end of each adjusting rod is fixedly assembled with the static end flange;

Each of the adjustment rods is provided with an external thread section, and a nut structure is respectively provided corresponding to each of the adjustment rods, and each nut structure is respectively screw-fitted on the corresponding adjustment rod, and each nut structure is used for forward rotation. When tightening, the flange at the push end moves to the right to adjust the length of the bellows expansion joint;

In the circumferential direction of the bellows main body, any two adjacent nut structures are connected through a synchronous transmission structure to realize synchronous rotation of all nut structures. When each nut structure rotates forward synchronously, each nut structure synchronously turns to the right move to compress the main body of the bellows synchronously; when the nut structures are reversed synchronously, each nut structure moves to the left to release the main body of the bellows synchronously;

At least one nut structure or the synchronous transmission structure is provided with a manual operation part for the operator to drive all the nut structures to rotate synchronously.

The beneficial effect is: the bellows telescopic joint for pipeline bus provided by the present invention connects each nut structure through a synchronous transmission structure, so that each nut structure can rotate synchronously, so that each nut structure can move synchronously along the corresponding adjustment rod, and then make During the moving process, the flange at the moving end is always located in the plane perpendicular to the main body of the bellows without deflection, so that the force on the flange at the moving end is balanced and the expansion joint of the bellows is not easy to be damaged; The manual operation part is convenient for the operator to drive the nut structures to rotate synchronously through the operating handle, and the operation is convenient.

As a further improvement, the nut structure includes a nut body, which is used to screw fit on the corresponding adjustment rod, and the nut structure also includes a two-way overrunning clutch structure, which includes an outer ring active part and an inner ring active part. A shaft driven part, the inner shaft driven part is integrated with the nut body or fixedly assembled separately, the synchronous transmission structure includes a synchronous transmission part, and any two adjacent nut structures in the circumferential direction of the bellows main body The synchronous transmission parts are provided between the active parts of the outer ring to drive the active parts of the outer ring of all nut structures to rotate forward and reverse synchronously, and then drive the nut body to forward intermittent rotation and reverse direction through the corresponding two-way overrunning clutch structure. Turn intermittently.

The beneficial effect is that: the nut structure is provided with a two-way overrunning clutch, which facilitates intermittent forward and reverse intermittent rotation of the nut body, which is easy to implement, and also makes the rotation driving structure of the nut body simple and easy to manufacture.

As a further improvement, the structure of the two-way overrunning clutch is an external ratchet-pawl clutch structure, a ratchet is arranged on the driven part of the inner shaft of the external ratchet-pawl clutch structure, and a forward rotation is hinged on the active part of the outer ring. The ratchet and the reverse ratchet, the swing stroke of the forward rotation ratchet and the reverse ratchet are respectively provided with a working position for engaging with the ratchet and an avoidance position for disengaging from the ratchet, and a ratchet is provided on the active part of the outer ring. The claw elastic part is used to apply elastic force to the forward rotation ratchet and the reverse rotation ratchet to force the corresponding ratchet to swing towards the corresponding working position. The active part of the outer ring is also provided with a steering switching structure, and the steering switching structure It is used to switch and drive the forward rotation pawl and the reverse rotation pawl to swing toward the corresponding avoidance position, and the steering switching structure is used to drive the reverse rotation ratchet to swing to the corresponding avoidance position when the forward rotation ratchet is engaged with the ratchet wheel. Disengaged from the ratchet, the steering switching structure is used to drive the forward rotation pawl to swing to a corresponding avoidance position when the reverse rotation pawl engages with the ratchet wheel so as to disengage from the ratchet wheel.

The beneficial effects are as follows: adopting an external ratchet-pawl clutch structure, setting a ratchet on the driven part of the inner shaft, setting a forward-rotating ratchet and a reverse-rotating ratchet on the active part of the outer ring, and setting the forward-rotating ratchet and the reverse-rotating ratchet The swing stroke is provided with a working position for engaging with the ratchet and an avoiding position for disengaging from the ratchet. The overall structure is simple, and it is convenient for the active part of the outer ring to drive the driven part of the inner shaft in two directions intermittently to realize rotation.

As a further improvement, the steering switching structure includes a switching shaft extending in the left and right directions, the switching shaft is rotatably mounted on the active part of the outer ring, and a cam is provided on the switching shaft, and the cam is used to push the forward rotation ratchet. The claw and the reverse ratchet swing to the corresponding avoidance position. The switching shaft has a forward rotation working position and a reverse rotation working position on its rotation stroke. Push it to the corresponding avoidance position, and when the switching shaft is in the reverse working position, it is used to push the forward rotation ratchet to the corresponding avoidance position.

The beneficial effect is: the switching shaft drives the cam to rotate to push the forward rotation pawl and the reverse rotation pawl to the corresponding avoidance position, the structure is simple, and it is convenient to directly push the corresponding pawl to swing, and then effectively push the corresponding pawl to the corresponding avoidance position. While avoiding the position, the steering switching structure is simplified.

As a further improvement, the forward rotation pawl and the reverse rotation pawl respectively have a hinged end for being hinged on the active part of the outer ring and an engaging end for engaging with the ratchet, and in the radial direction of the ratchet, The cam is located on the side of the hinged end of the forward-rotating pawl and the reverse-rotating pawl facing the ratchet, and the cam is located between the forward-rotating pawl and the reverse-rotating pawl in the circumferential direction of the ratchet, The cam has an outer peripheral pushing surface. When the switching shaft rotates to the forward rotation position, the outer peripheral pushing surface pushes the reverse pawl to swing to the corresponding avoidance position. When the reverse rotation position is reached, the outer peripheral pushing surface pushes the forward rotation pawl to swing to the corresponding avoidance position.

The beneficial effect is that: the cam is provided with an outer peripheral pushing surface, and by rotating the cam, the outer peripheral pushing surface of the cam pushes the corresponding ratchet to swing to the avoidance position, so that the cam structure is simple.

As a further improvement, the cam is provided with a positive rotation blocking surface and a reverse rotation blocking surface on both sides of the outer peripheral pushing surface in the cam circumferential direction. Located between the hinged end and the engaging end of the forward rotation pawl, in the extension direction of the reversing pawl, the reverse stop surface is located between the hinged section and the engaging end of the reversing pawl, on the switching axis When turning to the forward rotation working position, the forward rotation blocking surface pushes and blocks the forward rotation pawl, and when the switching shaft rotates to the reverse rotation working position, the reverse rotation blocking surface Push and block the reverse pawl.

The beneficial effect is: using the stop surface of the cam to stop and limit the swing range of the corresponding ratchet, so that the corresponding engagement end of the corresponding ratchet only exerts a pushing force on the ratchet in the circumferential direction, and does not exert a force on the adjacent ratchet in the radial direction of the ratchet. The corresponding side surfaces of the teeth exert pressure force to reduce the radial pressure on the ratchet wheel from the engagement ends of the two ratchet pawls, thereby prolonging the service life of the ratchet wheel.

As a further improvement, an installation cavity is provided at the rotation center of the active part of the outer ring, and a cover is provided on the left side of the active part of the outer ring corresponding to the installation cavity, and the cover covers the positive rotation pawl , reverse rotation pawl, switch shaft and nut body are packaged in the installation cavity, the left ends of the forward rotation pawl, reverse rotation pawl, switching shaft and nut body are hingedly assembled on the cover, and the positive rotation The right end of the rotary ratchet, the reverse ratchet, the switching shaft and the nut body is hingedly assembled on the active part of the outer ring, the switching shaft has an operating end that passes through the cover to the left, and the operating end is provided with The operating part is used for the operator to drive the switching shaft to rotate between the forward rotation working position and the reverse rotation working position.

The beneficial effect is: it is convenient to cooperate with the installation cavity and the cover to realize the hinged assembly of the forward rotation pawl, the reverse rotation pawl, the switching shaft and the nut body on the active part of the outer ring, and at the same time, the cam is rotated through the operation part, which is convenient for operation Personnel operation, saving time and effort.

As a further improvement, the active part of the outer ring is a crank body, and the crank body has two transmission crank arms distributed along the circumferential direction of the active part of the outer ring at intervals, and two nuts arbitrarily adjacent in the circumferential direction of the main body of the bellows The synchronous transmission parts are respectively arranged between the two transmission crank arms on the inner side of the structure.

The beneficial effect is that: the crank arm body is provided with a transmission crank arm, which facilitates the connection of the synchronous transmission part and the active part of the outer ring, simplifies the overall structure, and facilitates the transmission connection of two adjacent crank arm bodies.

As a further improvement, the crank arm body is V-shaped as a whole, the two arms of the V-shaped crank arm body form the two transmission crank arms, and the opening of the V-shaped crank arm body is in the main body of the bellows. It is arranged radially away from the bellows main body.

The beneficial effect is: the crank arm is designed to be V-shaped, and the V-shaped opening is arranged away from the bellows main body in the radial direction of the bellows main body, which increases the gap between the synchronous transmission part and the bellows main body, and prevents the bellows main body from moving against the synchronous transmission part. create hindrance.

The technical solution of the pipeline busbar provided by the present invention is: a pipeline busbar, comprising:

Two busbar cylinders arranged at intervals along the left and right directions, and the opposite ends of the two busbar cylinders are provided with connecting flanges;

The bellows expansion joint extends axially along the left and right directions, and the two ends of the bellows expansion joint are fixedly connected to the connecting flanges at the opposite ends of the two busbar cylinders through a flange connection structure;

The bellows expansion joint includes:

The main body of the bellows extends along the left and right directions. The right end of the bellows main body is provided with a static end flange, and the left end is provided with a moving end flange. The bus bar barrel connection on both sides;

At least two adjusting rods, each extending along the left and right directions, the left end of each adjusting rod is slidably assembled with the moving end flange in the left and right direction, and the right end of each adjusting rod is fixedly assembled with the static end flange;

Each of the adjustment rods is provided with an external thread section, and a nut structure is respectively provided corresponding to each of the adjustment rods, and each nut structure is respectively screw-fitted on the corresponding adjustment rod, and each nut structure is used for forward rotation. When tightening, the flange at the push end moves to the right to adjust the length of the bellows expansion joint;

In the circumferential direction of the bellows main body, any two adjacent nut structures are connected through a synchronous transmission structure to realize synchronous rotation of all nut structures. When each nut structure rotates forward synchronously, each nut structure synchronously turns to the right move to compress the main body of the bellows synchronously; when the nut structures are reversed synchronously, each nut structure moves to the left to release the main body of the bellows synchronously;

At least one nut structure or the synchronous transmission structure is provided with a manual operation part for the operator to drive all the nut structures to rotate synchronously.

The beneficial effect is: the pipeline busbar provided by the present invention connects the busbar cylinders on both sides through the bellows expansion joint, avoiding expansion and damage when the busbar is rigidly connected with the cabinet body, and the bellows expansion joint connects each nut structure through the synchronous transmission structure Connected so that each nut structure can rotate synchronously, so that each nut structure can move synchronously along the corresponding adjustment rod, so that the movable end flange is always located in the plane perpendicular to the main body of the bellows during the movement, and no deviation will occur. Slanted, so that the force on the flange of the moving end is balanced, and the bellows expansion joint is not easy to be damaged; moreover, a manual operation part is set on the nut structure, which is convenient for the operator to drive the nut structures to rotate synchronously through the operating handle, and the operation is convenient.

As a further improvement, the nut structure includes a nut body, which is used to screw fit on the corresponding adjustment rod, and the nut structure also includes a two-way overrunning clutch structure, which includes an outer ring active part and an inner ring active part. A shaft driven part, the inner shaft driven part is integrated with the nut body or fixedly assembled separately, the synchronous transmission structure includes a synchronous transmission part, and any two adjacent nut structures in the circumferential direction of the bellows main body The synchronous transmission parts are provided between the active parts of the outer ring to drive the active parts of the outer ring of all nut structures to rotate forward and reverse synchronously, and then drive the nut body to forward intermittent rotation and reverse direction through the corresponding two-way overrunning clutch structure. Turn intermittently.

The beneficial effect is that: the nut structure is provided with a two-way overrunning clutch, which facilitates intermittent forward and reverse intermittent rotation of the nut body, which is easy to implement, and also makes the rotation driving structure of the nut body simple and easy to manufacture.

As a further improvement, the structure of the two-way overrunning clutch is an external ratchet-pawl clutch structure, a ratchet is arranged on the driven part of the inner shaft of the external ratchet-pawl clutch structure, and a forward rotation is hinged on the active part of the outer ring. The ratchet and the reverse ratchet, the swing stroke of the forward rotation ratchet and the reverse ratchet are respectively provided with a working position for engaging with the ratchet and an avoidance position for disengaging from the ratchet, and a ratchet is provided on the active part of the outer ring. The claw elastic part is used to apply elastic force to the forward rotation ratchet and the reverse rotation ratchet to force the corresponding ratchet to swing towards the corresponding working position. The active part of the outer ring is also provided with a steering switching structure, and the steering switching structure It is used to switch and drive the forward rotation pawl and the reverse rotation pawl to swing toward the corresponding avoidance position, and the steering switching structure is used to drive the reverse rotation ratchet to swing to the corresponding avoidance position when the forward rotation ratchet is engaged with the ratchet wheel. Disengaged from the ratchet, the steering switching structure is used to drive the forward rotation pawl to swing to a corresponding avoidance position when the reverse rotation pawl engages with the ratchet wheel so as to disengage from the ratchet wheel.

The beneficial effects are as follows: adopting an external ratchet-pawl clutch structure, setting a ratchet on the driven part of the inner shaft, setting a forward-rotating ratchet and a reverse-rotating ratchet on the active part of the outer ring, and setting the forward-rotating ratchet and the reverse-rotating ratchet The swing stroke is provided with a working position for engaging with the ratchet and an avoiding position for disengaging from the ratchet. The overall structure is simple, and it is convenient for the active part of the outer ring to drive the driven part of the inner shaft in two directions intermittently to realize rotation.

As a further improvement, the steering switching structure includes a switching shaft extending in the left and right directions, the switching shaft is rotatably mounted on the active part of the outer ring, and a cam is provided on the switching shaft, and the cam is used to push the forward rotation ratchet. The claw and the reverse ratchet swing to the corresponding avoidance position. The switching shaft has a forward rotation working position and a reverse rotation working position on its rotation stroke. Push it to the corresponding avoidance position, and when the switching shaft is in the reverse working position, it is used to push the forward rotation ratchet to the corresponding avoidance position.

The beneficial effect is: the switching shaft drives the cam to rotate to push the forward rotation pawl and the reverse rotation pawl to the corresponding avoidance position, the structure is simple, and it is convenient to directly push the corresponding pawl to swing, and then effectively push the corresponding pawl to the corresponding avoidance position. While avoiding the position, the steering switching structure is simplified.

As a further improvement, the forward rotation pawl and the reverse rotation pawl respectively have a hinged end for being hinged on the active part of the outer ring and an engaging end for engaging with the ratchet, and in the radial direction of the ratchet, The cam is located on the side of the hinged end of the forward-rotating pawl and the reverse-rotating pawl facing the ratchet, and the cam is located between the forward-rotating pawl and the reverse-rotating pawl in the circumferential direction of the ratchet, The cam has an outer peripheral pushing surface. When the switching shaft rotates to the forward rotation position, the outer peripheral pushing surface pushes the reverse pawl to swing to the corresponding avoidance position. When the reverse rotation position is reached, the outer peripheral pushing surface pushes the forward rotation pawl to swing to the corresponding avoidance position.

The beneficial effect is that: the cam is provided with an outer peripheral pushing surface, and by rotating the cam, the outer peripheral pushing surface of the cam pushes the corresponding ratchet to swing to the avoidance position, so that the cam structure is simple.

As a further improvement, the cam is provided with a positive rotation blocking surface and a reverse rotation blocking surface on both sides of the outer peripheral pushing surface in the cam circumferential direction. Located between the hinged end and the engaging end of the forward rotation pawl, in the extension direction of the reversing pawl, the reverse stop surface is located between the hinged section and the engaging end of the reversing pawl, on the switching axis When turning to the forward rotation working position, the forward rotation blocking surface pushes and blocks the forward rotation pawl, and when the switching shaft rotates to the reverse rotation working position, the reverse rotation blocking surface Push and block the reverse pawl.

The beneficial effect is: using the stop surface of the cam to stop and limit the swing range of the corresponding ratchet, so that the corresponding engagement end of the corresponding ratchet only exerts a pushing force on the ratchet in the circumferential direction, and does not exert a force on the adjacent ratchet in the radial direction of the ratchet. The corresponding side surfaces of the teeth exert pressure force to reduce the radial pressure on the ratchet wheel from the engagement ends of the two ratchet pawls, thereby prolonging the service life of the ratchet wheel.

As a further improvement, an installation cavity is provided at the rotation center of the active part of the outer ring, and a cover is provided on the left side of the active part of the outer ring corresponding to the installation cavity, and the cover covers the positive rotation pawl , reverse rotation pawl, switch shaft and nut body are packaged in the installation cavity, the left ends of the forward rotation pawl, reverse rotation pawl, switching shaft and nut body are hingedly assembled on the cover, and the positive rotation The right end of the rotary ratchet, the reverse ratchet, the switching shaft and the nut body is hingedly assembled on the active part of the outer ring, the switching shaft has an operating end that passes through the cover to the left, and the operating end is provided with The operating part is used for the operator to drive the switching shaft to rotate between the forward rotation working position and the reverse rotation working position.

The beneficial effect is: it is convenient to cooperate with the installation cavity and the cover to realize the hinged assembly of the forward rotation pawl, the reverse rotation pawl, the switching shaft and the nut body on the active part of the outer ring, and at the same time, the cam is rotated through the operation part, which is convenient for operation Personnel operation, saving time and effort.

As a further improvement, the active part of the outer ring is a crank body, and the crank body has two transmission crank arms distributed along the circumferential direction of the active part of the outer ring at intervals, and two nuts arbitrarily adjacent in the circumferential direction of the main body of the bellows The synchronous transmission parts are respectively arranged between the two transmission crank arms on the inner side of the structure.

The beneficial effect is that: the crank arm body is provided with a transmission crank arm, which facilitates the connection of the synchronous transmission part and the active part of the outer ring, simplifies the overall structure, and facilitates the transmission connection of two adjacent crank arm bodies.

As a further improvement, the crank arm body is V-shaped as a whole, the two arms of the V-shaped crank arm body form the two transmission crank arms, and the opening of the V-shaped crank arm body is in the main body of the bellows. It is arranged radially away from the bellows main body.

The beneficial effect is: the crank arm is designed to be V-shaped, and the V-shaped opening is arranged away from the bellows main body in the radial direction of the bellows main body, which increases the gap between the synchronous transmission part and the bellows main body, and prevents the bellows main body from moving against the synchronous transmission part. create hindrance.

Description of drawings

Fig. 1 is the structural representation of bellows expansion joint provided by the present invention;

Fig. 2 is the structural representation of nut structure in Fig. 1;

Figure 3 is an enlarged view of A in Figure 2;

Fig. 4 is the exploded schematic diagram of Fig. 2;

Fig. 5 is a D-D sectional view of Fig. 2;

Fig. 6 is a working schematic diagram of the bellows expansion joint;

FIG. 7 is a side view of FIG. 6 .

Explanation of reference signs: 1, static end flange; 2, moving end flange; 3, adjusting rod; 31, external thread section; 4, nut structure; 41, arm body; 410, transmission arm; 42, installation Cavity; 421, the first reverse rotation groove; 422, the first limit slot; 43, cover; 431, V-shaped groove; 432, fastening bolt; 433, the second reverse rotation groove; 434, switching Shaft installation hole; 435, second limit slot hole; 44, nut body; 441, limit part; 442, ratchet; 45, reverse pawl; 450, reverse pawl elastic member; 451, reverse hinge end ; 452, reverse rotation engagement end; 46, forward rotation ratchet; 460, forward rotation ratchet elastic member; 461, forward rotation hinged end; 462, forward rotation engagement end; 5, manual operation part; 6, transmission rod; 7 , operating handle; 8, bellows main body; 9, steering switching structure; 91, cam; 911, outer peripheral pushing surface; 912, reverse rotation blocking surface; 913, forward rotation blocking surface; Reversing handle.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention, that is, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that relative terms such as "first" and "second" that may appear in the specific embodiments of the present invention are only used to distinguish one entity or operation from another entity or operation, and No such actual relationship or order between these entities or operations is necessarily required or implied. Moreover, the terms "comprising", "comprising", or any other variation thereof, where the terms may appear, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, the possible occurrence of an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

In the description of the present invention, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" that may appear should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, Or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

In the description of the present invention, unless otherwise clearly specified and limited, the term "has to be" that may appear should be understood in a broad sense, for example, the object of "has to be" can be a part of the body, or it can be separated from the body Arranged and connected on the body, the connection can be detachable or non-detachable. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

Below in conjunction with embodiment the present invention is described in further detail.

Embodiment 1 of the pipeline bus provided in the present invention:

In the bellows expansion joints in the prior art, in order to make the bellows, flanges, tie rods, and adjusting bolts uniformly stressed during the process and not deformed or damaged, it usually requires multiple people to operate the adjusting bolts at the same time or symmetrically and slowly adjust each adjusting bolt one by one. Adjustment, the steps are cumbersome, time-consuming and labor-intensive, the operation efficiency is not high, and the effect of balanced force cannot be fully achieved. In the bellows expansion joint for pipeline bus provided by the present invention, the nut structures 4 set on the adjustment rods 3 arranged around the bellows main body 8 are connected through transmission rods 6, so that each nut structure 4 can be synchronized along the The bellows main body 8 moves axially, saving time and effort, and each nut structure 4 moves synchronously so that each nut structure 4 is always kept in the same plane perpendicular to the axial direction of the bellows main body 8, so that when the bellows main body 8 is compressed, Uniform force, not easy to damage.

As shown in Figures 1 to 7, the overall pipeline bus includes two sections of busbar barrels (not shown in the figure) arranged coaxially and facing each other. Bellows expansion joints are arranged between the two sections of busbar barrels to The bus barrels are connected.

The bellows expansion joint includes a bellows main body 8, which extends along the left and right directions. The left end of the bellows main body 8 is provided with a moving end flange 2, and the moving end flange 2 is used to communicate with the busbar on the left side of the bellows main body 8. Cylinder flange connection, the right end of the bellows main body is provided with a static end flange 1, and the static end flange 1 is used to connect with the bus bar cylinder flange on the right side of the bellows main body 8.

In order to realize the movement of the movable end flange 2 to adjust the length of the bellows main body 8, four adjustment rods 3 are arranged between the movable end flange 2 and the static end flange support, and the four adjustment rods 3 are arranged along the bellows main body 8. The circumferential intervals of each adjustment rod 3 are uniformly arranged, and each adjustment rod 3 extends along the left and right directions. The right end of each adjustment rod 3 is fixedly connected with the static end flange 1, and the left end of each adjustment rod 3 is slidably assembled with the movable end flange 2.

Each adjusting rod 3 is provided with an external thread section 31, and a nut structure 4 is screw-mounted on the external thread section 31. In the circumferential direction of the bellows main body 8, any two adjacent nut structures 4 are connected through a synchronous transmission structure. In order to realize the synchronous rotation of all nut structures 4, when each nut structure 4 synchronously rotates forward, each nut structure 4 moves to the right synchronously, pushes the end flange 2 to move to the right, and then compresses the bellows main body 8 synchronously; each nut structure 4. During synchronous reverse rotation, each nut structure 4 moves to the left synchronously. At this time, each nut structure 4 does not apply rightward thrust to the flange 2 at the moving end, so as to release the bellows main body 8 synchronously.

The synchronous transmission structure includes four transmission rods 6. The transmission rods 6 are used as synchronous transmission parts to realize the synchronous rotation of all nut structures. Each nut structure 4 is respectively provided with a manual operation part 5, and the manual operation part 5 is provided with a mounting groove. One of the nut structures 4 is used as a driving part, and is inserted and operated in the manual operation part 5 of the nut structure 4. Handle 7, when pulling operating handle 7, all nut structures 4 are rotated synchronously.

In this embodiment, the nut structure 4 includes a nut body 44 and a two-way overrunning clutch structure. The structure of the two-way overrunning clutch in this embodiment is an external ratchet-pawl clutch structure, and the external ratchet-pawl clutch structure includes the active part of the outer ring, the forward rotation pawl 46, the reverse rotation pawl 45, and the ratchet wheel 442. And the driven part of the inner shaft, the ratchet 442 is installed on the driven part of the inner shaft. In this embodiment, the driven part of the inner shaft is integrated with the nut body 44 .

The forward rotation pawl 46 and the reverse rotation pawl 45 are arranged at intervals in the circumferential direction of the bellows main body 8 . The top of the forward rotation ratchet 46 is a forward rotation hinged end 461, which is hinged with the active part of the outer ring. The lower end of the forward rotation ratchet 46 is the forward rotation engagement end 462, and the forward rotation engagement end 462 rotates around the forward rotation hinged end 461, and the forward rotation engagement end 462 is provided with a working position and an escape position on the rotation stroke. When the forward rotation engagement end 462 is in the working position, the forward rotation engagement end 462 presses against the tooth surface of the ratchet 442 ;

A forward rotation pawl elastic member 460 is provided between the forward rotation pawl 46 and the active part of the outer ring. One end of the forward rotation pawl elastic member 460 is fixedly connected to the outer ring active part, and the other end is fixedly connected to the forward rotation pawl 46. The elastic acting force towards the reverse rotation pawl 45 is exerted on the forward rotation ratchet 46 , so that the forward rotation engagement end 462 of the forward rotation ratchet 46 is rotated to the corresponding working position.

The top of the reversing pawl 45 is a reversing hinged end 451, which is hinged with the active part of the outer ring. The lower end of the reversing ratchet 45 is a reversing engagement end 452, which rotates around the reversing hinged end 451, and the reversing engagement end 452 is provided with a working position and an escape position on the rotation stroke. When the reverse engagement end 452 is in the working position, the reverse engagement end 452 presses against the tooth surface of the ratchet 442 ;

A reverse pawl elastic member 450 is provided between the reverse pawl 45 and the active part of the outer ring. One end of the reverse pawl elastic member 450 is fixedly connected to the active part of the outer ring, and the other end is fixedly connected to the reverse pawl 45. The elastic acting force towards the forward rotation pawl 46 is exerted on the reverse rotation pawl 45 , so that the reverse rotation engagement end 452 of the reverse rotation pawl 45 is rotated to a corresponding working position.

A steering switching structure is provided between the forward rotation pawl 46 and the reverse rotation pawl 45. The steering switching structure includes a switching shaft 92 extending in the left and right directions. The switching shaft 92 is rotatably assembled on the active part of the outer ring. There are forward working position and reverse working position on it.

The right end of the switching shaft 92 is provided with a cam 91, the cam 91 is located on the side of the forward rotation hinged end 462 and the reverse rotation hinged end 452 facing the ratchet 442, and, on the circumferential direction of the ratchet 442, the cam 91 is located on the forward rotation ratchet 46 Between the cam 91 and the reversing ratchet 45, an outer peripheral push surface 911 is provided on the cam 91. The outer peripheral push surface 911 is an arc surface structure, and the arc top of the outer peripheral push surface 911 faces the two ratchets for switching the shaft 92. Pushing the reverse pawl 45 to the corresponding avoidance position when it is in the forward rotation working position is used to push the positive ratchet 45 to the corresponding avoidance position when the switching shaft 92 is in the reverse rotation working position.

A forward rotation stop surface 913 and a reverse rotation stop surface 912 are symmetrically arranged on the cam 91 with respect to the center of the outer peripheral push surface 911. Between the forward rotation engagement ends 462 ; the reverse rotation stop surface 912 is a plane, located between the reverse rotation hinged end 451 and the reverse rotation engagement end 452 of the reverse rotation pawl 45 . When the switching shaft 92 rotates to the forward rotation working position, the forward rotation stop surface 913 pushes and stops the forward rotation pawl, so as to prevent the positive rotation engagement end 462 of the forward rotation pawl 46 from acting on both adjacent tooth surfaces of the ratchet 442 force; when the switching shaft 92 rotates to the reverse working position, the reverse stop surface 912 pushes and blocks the reverse pawl 45, so as to prevent the reverse engagement end 452 of the reverse pawl 45 from pairing the two adjacent teeth on the ratchet 442. Force is generated on both surfaces. Then the service life of the ratchet 442 is improved.

It should be explained that when the forward rotation ratchet 46 swings to the working position under the action of the forward rotation ratchet elastic member 460 , the forward rotation engagement end 462 of the forward rotation ratchet 46 is used to press against the corresponding side surface of the teeth of the ratchet 442 At this time, the forward rotation stop surface 913 of the cam 91 is used to stop the swing range of the limited forward rotation ratchet 46, so that the forward rotation engagement end 462 only exerts a pushing force on the ratchet 442 in the circumferential direction, and does not The ratchet 442 exerts pressing force on the corresponding side surfaces of the adjacent teeth in the radial direction, reducing the radial pressure on the ratchet 442 from the positively rotating engagement end 462 , thereby prolonging the service life of the ratchet 442 .

The active part of the outer ring is specifically the crank body 41. The crank body 41 includes the crank body and the cover 45. The rotation center of the crank body is provided with a placement cavity 42. The installation cavity 42 extends along the axial direction of the bellows main body 8 as a whole. For the rotation and insertion of the nut body 44 . In a plane perpendicular to the axial direction of the bellows main body 8, a first forward rotation groove and a first reverse rotation groove 421 are provided on the wall of the installation chamber 42 at intervals from left to right, and correspondingly, a first forward rotation groove 421 is provided on the cover 43 There is a second forward rotation groove and a second reverse rotation groove 433 . The first forward rotation slot and the second forward rotation slot pair together to form a forward rotation hinge hole for the rotation assembly of the forward rotation hinge end 460, and the first reverse rotation slot 421 is opposite to the second reverse rotation slot 433. And a reverse hinge hole is formed for the rotation and transfer of the reverse hinge end.

The overall shape of the cover 43 fits with the mouth of the installation cavity 42 of the crank body 41, and the cover 43 is provided with a bolt mounting hole for connecting with the crank body 41 by fastening bolts 432, so that the cover 43 Cover the mouth of the arm body 41 from left to right. A V-shaped groove 431 is provided on the left side of the cover 43 , and the V-shaped groove 431 provides a turning space for the reversing handle 93 . The bottom of the V-shaped groove 431 is provided with a switch shaft installation hole 434 , and the switch shaft installation hole 434 extends along the front-to-back direction for the switch shaft 92 to extend into the installation cavity 42 from front to back.

In order to make each arm body 41 move left and right with the nut body 44 on the corresponding adjustment rod 3, the nut body 44 is a nut barrel, and an annular stopper 441 is protruded on the outer peripheral surface of the nut barrel. At this time, the ratchet 442 is connected to the on the annular stopper 441 . A first limit slot 422 is set in the arm body 41, a second limit slot 435 is set on the cover 43, and the first limit slot 422 and the second limit slot 435 are paired to form a limit hole , the diameter of the limiting hole is greater than the diameter of the annular limiting portion 441 of the nut barrel for the clamping of the limiting portion 441, the diameter of the openings at the left and right ends of the limiting hole is smaller than the annular limiting portion 441, to prevent the limiting portion 441 from the hole The opening slides out, and then the nut cylinder and the crank arm body 41 are installed together at the axial upper limit, so that the crank arm body 41 can move with the nut cylinder.

In order to make each crank body rotate synchronously, in this embodiment, the crank body 41 has a V-shaped structure, and the V-shaped opening of the V-shaped crank body is arranged away from the bellows main body 8 in the radial direction of the bellows main body 8. The V-shaped crank arm body 41 is provided with two arms, and the two arms form the transmission crank arm 410 . In the bellows main body 8 circumferential direction, a transmission rod 6 is respectively arranged between the two transmission crank arms 410 on the inner side of any adjacent two crank arms 41, and the two ends of the transmission rod 6 are connected to the adjacent two crank arms respectively. 41 are hinged, and then all crank bodies 41 are connected together in transmission, so that each crank body 41 can rotate synchronously, and the length of each transmission rod 6 is adjustable, which can adapt to bellows main bodies 8 of different diameters.

When the main body 8 of the bellows needs to be compressed, each nut structure 4 needs to be driven to rotate in the forward direction, so as to push the end flange 2 to move to the right. Turn the reversing handle 93, so that the switching shaft 92 is in the forward rotation position. At this time, the outer peripheral pushing surface 911 of the cam 91 pushes the reversing pawl 45, so that the reversing engagement end 452 of the reversing pawl 45 is in the corresponding position. Correspondingly, the forward rotation stop surface 913 of the cam 91 cooperates with the forward rotation ratchet elastic member 460 so that the forward rotation engagement end 462 of the forward rotation ratchet 46 is in the corresponding working position.

Then the operating handle 7 is inserted into the installation groove of the manual operation part 5, and the operating handle 7 is pulled back and forth. When the operating handle 7 is pulled forward, each arm body 41 rotates synchronously. Rotate the engaging end 462 to push the ratchet 442 to rotate forward. When the ratchet 442 rotates, the nut cylinder drives the crank arm body 41 to move to the right. When the body 41 rotates in the reverse direction, the forward-rotating engagement end 462 is disengaged from the ratchet 442 , so that each arm body 41 intermittently pushes the push-end flange 2 to move to the right.

When the bellows main body 8 needs to be elongated, each nut structure 4 needs to be driven to rotate in reverse, so that each nut structure 4 gradually moves to the left. Rotate the reversing handle 93 in the reverse direction, so that the switching shaft 92 is in the reverse working position. At this time, the outer peripheral pushing surface 911 of the cam 91 pushes the forward rotation pawl 46, so that the forward rotation engagement end 462 of the forward rotation pawl 46 is in the Corresponding to the avoidance position, correspondingly, the reverse rotation stop surface 912 of the cam 91 cooperates with the reverse rotation pawl elastic member 450 so that the reverse rotation engagement end 452 of the reverse rotation pawl 45 is in the corresponding working position.

Then the operating handle 7 is pulled back and forth. When the operating handle 7 is pulled forward, each arm body 41 rotates. The nut cylinder drives the crank body 41 to move to the left. When the operating handle 7 is pulled in the opposite direction, each crank body 41 rotates in the opposite direction synchronously. Each crank body 41 moves to the left intermittently, so that the bellows main body 8 gradually recovers its deformation.

The pipeline busbar provided by the present invention connects the crank bodies through the transmission rod, so that the crank bodies can rotate synchronously, so that the crank bodies can move synchronously along the corresponding adjustment rods, so that the flange at the moving end can be adjusted during the moving process. , is always located in the plane perpendicular to the main body of the bellows, without deflection, so that the force on the flange of the moving end is balanced and not easy to be damaged; moreover, a manual operation part is set on the arm body, which is convenient for the operator to drive each arm through the operating handle. The arm body rotates synchronously and is easy to operate.

Embodiment 2 of the pipeline bus provided in the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the active part of the outer ring of the externally-engaged ratchet-pawl clutch structure is the arm body 41, and each arm body 41 is provided with two transmissions. The crank arm 410 is provided with a transmission rod 6 between any two adjacent crank bodies 41 on the circumference of the bellows main body 8, and the two ends of the transmission rod 6 are respectively connected to the transmission crank arms of the adjacent two crank bodies 41. 410 are hinged to realize the synchronous rotation of each crank body 41 . In the present embodiment, the crank arm body is a cylindrical structure, and the outer peripheral surface of the crank arm body of the cylindrical structure is provided with external teeth, and a transmission belt is adopted, and the inner peripheral surface of the transmission belt is provided with internal teeth. The transmission belt fits each crank body, and the inner teeth of the transmission belt mesh with the outer teeth of each crank body, and then manually pull the belt around the bellows body to rotate forward and reverse in order to realize the synchronous forward and reverse rotation of each crank body .

Of course, in other embodiments, a sprocket is provided on the outer peripheral surface of each tubular arm body, and each arm body is connected through a chain transmission, and when the chain is forward and reverse, the forward and reverse rotation of each crank arm body is realized.

Embodiment 3 of the pipeline bus provided in the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, a transmission rod 6 is provided between any two adjacent crank arms 41 in the circumferential direction of the bellows main body 8, and the two ends of the transmission rod 6 They are respectively hinged with the transmission crank arms 410 of the two adjacent crank arm bodies 41 to realize the synchronous rotation of each crank arm body 41 . In this embodiment, in the circumferential direction of the main body of the bellows, the transmission cranks of any two adjacent crank bodies are connected by a rigid pull cord. When operating the operating handle, each crank body is tightened by a rigid pull cord Synchronous forward and reverse.

Embodiment 4 of the pipeline bus provided in the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the nut body 44 is a nut barrel, and a ratchet 442 is integrally provided on the outer peripheral surface of the nut barrel to form an inner ratchet-pawl clutch structure of an external meshing type. Shaft driven part. In this embodiment, no ratchet is provided on the nut cylinder, and a ratchet sleeve is set on the outer peripheral side of the nut cylinder. The ratchet sleeve is provided with a ratchet on the outer peripheral surface of the ratchet sleeve, and the ratchet sleeve and the nut are relatively fixedly assembled together. At this time, the ratchet sleeve is The inner shaft driven part of an external ratchet-pawl clutch configuration.

Embodiment 5 of the pipeline bus provided in the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, a cam 91 is provided between the forward rotation ratchet 46 and the reverse rotation ratchet 45, and the outer peripheral pushing surface 911 is provided on the cam 91. By rotating the cam 91 , so that the outer peripheral pushing surface 911 pushes the corresponding pawl, so that the pawl is disengaged from the ratchet 442 . In the present embodiment, no cam is provided, and two through holes are provided corresponding to the two pawls on the outer peripheral surface of the crank body, and a positioning stay cord is respectively arranged corresponding to the two through holes, and the positioning stay cord is worn outside the crank body. into the installation cavity, and connected with the corresponding pawl, and set the positioning column on the outer peripheral surface of the crank arm beside each through hole, by pulling the corresponding positioning pull rope, the pulled pawl is separated from the ratchet, and then the The pull cord is wound on the corresponding positioning post.

Embodiment 6 of the pipeline bus provided in the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, each arm body 41 is V-shaped. In this embodiment, each crank arm body is in-line, and in the circumferential direction of the bellows main body, a transmission rod is arranged between any two adjacent in-line crank bodies, and the two ends of the transmission rod are respectively Hinged with the two ends of the two crank arms.

Embodiment 7 of the pipeline bus provided in the present invention:

The difference between this embodiment and Embodiment 1 lies in that in Embodiment 1, the active part of the outer ring of the external ratchet-pawl clutch structure is the crank arm body 41 . In this embodiment, the active part of the outer ring of the external ratchet-pawl clutch structure is a cylinder, and the cylinder is provided with a housing cavity, and the forward rotation pawl, the reverse rotation pawl, the nut body, the steering switching structure and the corresponding elastic The parts are installed in the placement chamber, and the opening of the placement chamber is blocked by the cover. In the circumferential direction of the main body of the bellows, each cylinder is connected by a rigid pull rope, and there are several windings on the outer peripheral surface of each cylinder. One end of the rigid pull rope is fixedly connected to one of the cylinders, and the other end is a free end, which is used as the pull end. When the operator pulls the pull end, it will be tightened by the movement of the rigid pull rope. , so as to drive the cylinders to rotate forward synchronously. When the operator does not apply a pulling force, the cylinders fixedly connected with the rigid pull rope will reverse to drive the rigid pull rope to move in the reverse direction, and then make the cylinders reverse synchronously.

Embodiment 8 of the pipeline bus provided in the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the arm body 41 is provided with a placement chamber 42, and the placement chamber 42 is provided with a forward rotation ratchet 46, a reverse rotation ratchet 45, a nut body 44, and a steering wheel. The switching structure and the corresponding elastic parts are installed, and the opening of the placement cavity 42 is blocked by the cover 43 . In this embodiment, no cover is provided, and the crank body is divided into left and right parts as a whole. Grooves are placed in the two parts of the crank body. The pawl, reverse pawl, nut body, steering switching structure and corresponding elastic parts are installed.

Embodiment 9 of the pipeline bus provided in the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the cam 91 is provided with a forward rotation blocking surface 913 and a reverse rotation blocking surface 912, and the forward rotation blocking surface 913 prevents the positive rotation of the forward rotation ratchet 46. The rotating engagement end 462 presses against both sides of the ratchet 442 tooth surfaces at the same time, and the reverse rotation stop surface prevents the forward rotation engagement end 452 of the forward rotation ratchet 45 from simultaneously pressing against both sides of the ratchet 442 tooth surfaces. However, in this embodiment, the cam is not provided with a positive rotation blocking surface and a reverse rotation blocking surface, correspondingly, the service life of the ratchet will be shortened.

Embodiment 10 of the pipeline bus provided in the present invention:

The difference between this embodiment and Embodiment 1 is that the two-way overrunning clutch structure is an external ratchet-pawl two-way overrunning clutch mechanism. In this embodiment, the structure of the two-way overrunning clutch is a sprag type overrunning clutch structure. The sprag type overrunning clutch structure is a sprag type overrunning clutch structure. Parts and wedges.

The active part of the outer ring is an active cylinder, and the inner peripheral surface of the active cylinder has a plurality of active arc grooves, and each active arc groove is arranged at intervals in the circumferential direction of the active cylinder. The driven part of the inner shaft is a driven cylinder, and the outer peripheral surface of the driven cylinder is provided with a plurality of driven arc grooves. The number of driven arc grooves is the same as that of the active arc grooves. Arranged at intervals on the circumference of the driven cylinder, the inner peripheral surface of the driven cylinder is provided with internal threads for screw assembly with the corresponding adjusting rod.

The driving cylinder is coaxially set outside the driven cylinder. The diameter of the driving cylinder is larger than that of the driven cylinder. There are multiple wedges in the annular gap between the driving cylinder and the driven cylinder. The number of wedges is the same as that of the driving cylinder. The number of arc grooves is the same, each wedge is arranged obliquely in the annular gap, the end of the wedge facing the driving cylinder is provided with an active working surface, the active working surface is fitted with the active arc groove, and the end of the wedge facing the driven cylinder is arranged There is a driven working surface, and the driven working surface fits with the driven arc groove. The wedges are connected by an annular cage, and the middle part of each wedge is hinged with the cage, and the annular cage can rotate in the annular gap.

Rotate the ring cage so that each wedge extends obliquely. At this time, rotate the driving cylinder in the forward direction. When the cylinder is closed, the driven working surface is separated from the driven arc groove. The above process is repeated, so that the driven cylinder drives the active cylinder to move intermittently along the corresponding adjustment rod.

Rotate the ring cage in the opposite direction, so that each wedge rotates around its hinge axis with the ring cage, so that the direction of the oblique extension of each wedge is a mirror image of the previous direction of oblique extension. At this time, the forward rotation of the active circle When the driving cylinder rotates, the driven working surface of the wedge pushes the driven cylinder to reverse, and when the driving cylinder is rotated in the reverse direction, the driven working surface breaks away from the driven arc groove. The above process is repeated, so that the driven cylinder drives the active cylinder to move intermittently in reverse along the corresponding adjustment rod.

Embodiment 11 of the pipeline bus provided in the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, each arm body 41 is provided with a manual operation part 5, and the operating handle 7 is inserted in the installation groove of the manual operation part 5, and the Operate the handle to make the arms rotate synchronously. However, in this embodiment, no manual operation part is provided on each crank body, and a handle is provided on one of the four transmission rods for connecting any two adjacent crank bodies in the circumferential direction of the bellows body. Pulling up the handle makes the two crank bodies hinged with the transmission rod rotate, and then makes each crank body rotate synchronously; pressing down the handle makes the two crank bodies hinged with the transmission rod reverse, and then makes each The arm body turns and reverses synchronously.

The present invention also provides embodiments of bellows expansion joints for pipeline busbars:

The structure of the bellows expansion joint for the pipeline bus in this embodiment is the same as that of the bellows expansion joint in the first embodiment of the pipeline bus, and will not be repeated here.

Of course, in other embodiments, the bellows telescopic joint for the pipeline busbar can also use the structure of the bellows telescopic joint in any one of the pipeline busbar embodiments 2 to 11, which will not be repeated here.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. The scope of patent protection of the present invention is subject to the claims. Any equivalent structural changes made by using the description and accompanying drawings of the present invention, All should be included in the protection scope of the present invention in the same way.

Claims (9)

1. A bellows expansion joint for a pipeline busbar, comprising:

the corrugated pipe comprises a corrugated pipe main body (8), wherein the axial direction of the corrugated pipe main body extends along the left-right direction, a static end flange (1) is arranged at the right end of the corrugated pipe main body (8), a moving end flange (2) is arranged at the left end of the corrugated pipe main body, and the static end flange (1) and the moving end flange (2) are respectively used for being connected with bus cylinders at two axial sides of the corrugated pipe main body (8);

the adjusting device comprises at least two adjusting rods (3), wherein each adjusting rod (3) extends along the left-right direction, the left end of each adjusting rod (3) is slidably assembled with the movable end flange (2) in the left-right direction, and the right end of each adjusting rod (3) is fixedly assembled with the static end flange (1);

the corrugated expansion joint is characterized in that each adjusting rod (3) is provided with an external thread section (31), a nut structure (4) is arranged corresponding to each adjusting rod (3), each nut structure (4) is spirally assembled on the corresponding adjusting rod (3), and each nut structure (4) is used for pushing the movable end flange (2) to move rightwards when the movable end flange is screwed forwards so as to adjust the length of the corrugated expansion joint;

the method is characterized in that:

in the circumferential direction of the corrugated pipe main body (8), any two adjacent nut structures (4) are in transmission connection through a synchronous transmission structure so as to realize synchronous rotation of all the nut structures (4), and when the nut structures (4) rotate forwards synchronously, the nut structures (4) move rightwards synchronously so as to synchronously compress the corrugated pipe main body (8); when the nut structures (4) synchronously rotate reversely, the nut structures (4) move leftwards to synchronously release the corrugated pipe main body (8);

a manual operation part (5) is arranged on at least one nut structure (4) or the synchronous transmission structure, so that an operator can drive all the nut structures (4) to synchronously rotate;

the nut structure (4) comprises a nut body (44), the nut body (44) is used for being spirally assembled on the corresponding adjusting rod (3), the nut structure (4) further comprises a bidirectional overrunning clutch structure, the bidirectional overrunning clutch structure comprises an outer ring driving part and an inner shaft driven part, and the inner shaft driven part and the nut body (44) are integrally arranged or fixedly assembled in a split mode;

the bidirectional overrunning clutch structure is an externally meshed ratchet wheel-pawl clutch structure, a ratchet wheel (442) is arranged on an inner shaft driven part of the externally meshed ratchet wheel-pawl clutch structure, a forward rotating pawl (46) and a reverse rotating pawl (45) are hinged to an outer ring driving part, a working position for being meshed with the ratchet wheel (442) and an avoiding position for being disengaged from the ratchet wheel (442) are respectively arranged on swinging strokes of the forward rotating pawl (46) and the reverse rotating pawl (45), a pawl elastic part is arranged on the outer ring driving part and used for applying elastic acting force to the forward rotating pawl (46) and the reverse rotating pawl (45) to force the corresponding pawls to swing towards the corresponding working positions, a steering switching structure (9) is further arranged on the outer ring driving part and used for switching and driving the forward rotating pawl (46) and the reverse rotating pawl (45) to swing towards the corresponding avoiding positions to be disengaged from the ratchet wheel (442) when the pawl (46) is meshed with the ratchet wheel (442), and the steering switching structure is used for driving the reverse rotating pawl (45) to swing towards the avoiding positions to be disengaged from the ratchet wheel (442) when the ratchet wheel (442).

2. The bellows expansion joint for a pipeline bus according to claim 1, wherein the synchronous transmission structure comprises a synchronous transmission member, and the synchronous transmission member is respectively disposed between the outer ring driving parts of any two adjacent nut structures (4) in the circumferential direction of the bellows main body (8) so as to drive the outer ring driving parts of all the nut structures (4) to synchronously rotate in the forward direction and the reverse direction, and further drive the nut body (44) to rotate intermittently in the forward direction and in the reverse direction through the corresponding bidirectional overrunning clutch structure.

3. The bellows expansion joint for a pipe bus according to claim 1, wherein the steering switching structure (9) includes a switching shaft (92) extending in a left-right direction, the switching shaft (92) is rotatably mounted on the outer ring driving portion, a cam (91) is provided on the switching shaft (92), the cam (91) is used for pushing the forward pawl (46) and the reverse pawl (45) to swing to a corresponding avoidance position, the switching shaft (92) has a forward working position and a reverse working position on a rotation stroke thereof, the switching shaft (92) is used for pushing the reverse pawl (45) to the corresponding avoidance position when the switching shaft (92) is in the forward working position, and the switching shaft (92) is used for pushing the forward pawl (46) to the corresponding avoidance position when the switching shaft (92) is in the reverse working position.

4. The bellows expansion joint for a pipe bus according to claim 3, wherein the normal rotation pawl (46) and the reverse rotation pawl (45) have a hinge end for being hinged to the outer ring driving portion and an engagement end for being engaged with a ratchet (442), respectively, in a radial direction of the ratchet (442), the cam (91) is located on a side of the hinge end of the normal rotation pawl (46) and the reverse rotation pawl (45) facing the ratchet (442), the cam (91) is located between the normal rotation pawl (46) and the reverse rotation pawl (45) in a circumferential direction of the ratchet (442), the cam (91) has a peripheral push surface (911), the peripheral push surface (911) pushes the reverse rotation pawl (45) to swing to a corresponding avoidance position when the switching shaft (92) rotates to the normal rotation working position, and the peripheral push surface (911) pushes the normal rotation pawl (46) to swing to a corresponding avoidance position when the switching shaft (92) rotates to the reverse rotation working position.

5. The bellows expansion joint for a pipe bus according to claim 4, wherein the cam (91) is provided with a forward rotation blocking surface (913) and a reverse rotation blocking surface (912) on both sides of the outer peripheral push-up surface (911) in a circumferential direction of the cam (91), the forward rotation blocking surface (913) is located between a hinge end and an engagement end of the forward rotation pawl (46) in an extending direction of the forward rotation pawl (46), the reverse rotation blocking surface (912) is located between a hinge section and an engagement end of the reverse rotation pawl (45) in an extending direction of the reverse rotation pawl (45), the forward rotation blocking surface (913) pushes and blocks the forward rotation pawl (46) when the switching shaft (92) rotates to the forward rotation working position, and the reverse rotation blocking surface (912) pushes and blocks the reverse rotation pawl (45) when the switching shaft (92) rotates to the reverse rotation working position.

6. The bellows expansion joint for pipe bus according to claim 3 or 4 or 5, wherein a mounting cavity (42) is provided at a rotation center position of the outer ring driving portion, a sealing cover (43) is provided on a left side surface of the outer ring driving portion corresponding to the mounting cavity (42), the sealing cover (43) seals the forward rotation pawl (46), the reverse rotation pawl (45), the switching shaft (92) and the nut body (44) in the mounting cavity, left ends of the forward rotation pawl (46), the reverse rotation pawl (45), the switching shaft (92) and the nut body (44) are hinge-mounted on the sealing cover (43), right ends of the forward rotation pawl (46), the reverse rotation pawl (45), the switching shaft (92) and the nut body (44) are hinge-mounted on the outer ring driving portion, the switching shaft (92) has an operating end which penetrates through the sealing cover (43) leftward, and the operating end is provided with an operating portion for an operator to drive the switching shaft (92) to rotate between the forward rotation position and the reverse rotation position.

7. The bellows expansion joint for the pipeline bus according to claim 2, wherein the outer ring driving portion is a crank arm body (41), the crank arm body (41) has two transmission crank arms (410) distributed at intervals along the circumferential direction of the outer ring driving portion, and the synchronous transmission members are respectively arranged between the two transmission crank arms (410) on the inner sides of any two nut structures (4) adjacent to each other in the circumferential direction of the bellows main body (8).

8. The bellows expansion joint for a pipe bus according to claim 7, wherein the crank arm body (41) is generally V-shaped, two arms of the V-shaped crank arm body (41) form the two transmission crank arms (410), and an opening of the V-shaped crank arm body (41) is arranged in a radial direction of the bellows main body (8) away from the bellows main body (8).

9. A pipe bus, comprising:

the two bus cylinders are arranged at intervals along the left and right directions, and the opposite ends of the two bus cylinders are provided with connecting flanges;

the corrugated pipe expansion joint axially extends along the left and right directions, and two ends of the corrugated pipe expansion joint are fixedly connected with the connecting flanges at the opposite ends of the two bus cylinder bodies through flange connecting structures;

the method is characterized in that:

the bellows expansion joint is the bellows expansion joint for a pipe bus described in any one of claims 1 to 8.

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