Pipeline interface expansion device and operation method

Abstract

The present application discloses a pipeline interface expansion device and an operating method, including at least one expansion module, the expansion module including multiple expansion seats, multiple expansion plates, a connecting shaft and a control device, the expansion seat is rotatably set on the connecting shaft, the front part of the expansion seat is provided with a clamping opening, the expansion plates are suitable for being installed in the clamping opening one by one, a part of the expansion plates extends from the clamping opening to the front of the expansion seat, the control device is connected to the rear part of the expansion seat, the control device is suitable for rotating at least one expansion seat relative to the other expansion seats along the connecting shaft, so that at least one expansion plate is misaligned with the other expansion plates within the radial section of the connecting shaft. The present application has the characteristics of efficient and safe operation, and can realize rapid expansion of the pipeline interface to facilitate subsequent maintenance.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline maintenance, and in particular to a pipeline interface expansion device and an operating method. Background Art

[0002] A pipeline is a device connected by pipes, pipe connectors and valves for transporting gas, liquid or fluid with solid particles. Pipes are widely used, mainly in water supply, drainage, heat supply, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering and various industrial installations. When an abnormality occurs in the pipeline system and maintenance of part of the pipeline is required, it is necessary to separate the drainage and cut off the pipe interface to ensure the safety of the pipeline system.

[0003] However, the existing pipeline interface expansion method has the following defects: since the pipeline interfaces are generally tightly connected, there is currently no convenient equipment for pipeline interface expansion on the market. Workers usually use tools such as wrenches and crowbars to expand the pipeline interfaces, which is inconvenient to operate and less safe. Summary of the Invention

[0004] One purpose of the present application is to provide a pipeline interface expansion device and an operating method that are efficient and safe to operate.

[0005] In order to achieve the above objectives, the technical solution adopted in this application is: a pipeline interface expansion device, comprising at least one expansion module, the expansion module comprising multiple expansion seats, multiple expansion plates, a connecting shaft and a control device, the expansion seat is rotatably set on the connecting shaft, the front part of the expansion seat is provided with a clamping opening, the expansion plates are suitable for being installed one by one in the clamping opening, a part of the expansion plates extends from the clamping opening to the front of the expansion seat, the control device is connected to the rear part of the expansion seat, and the control device is suitable for making at least one of the expansion seats rotate relative to the other expansion seats along the connecting shaft, so that at least one of the expansion plates is misaligned with the other expansion plates within the radial cross-section of the connecting shaft.

[0006] In some embodiments, the clamping mouth clamps both sides of the expansion piece in the circumferential direction of the connecting shaft, the clamping mouth is close to one end of the connecting shaft, and extends outward on both sides of the circumference of the connecting shaft to form a stress release cavity, and the rear end of the expansion piece is suitable for being accommodated in the stress release cavity; the stress release cavity extends along the circumference of the connecting shaft; an arc-shaped structure transition is provided between the stress release cavity and the clamping mouth; the rear end of the expansion piece abuts against the side wall of the stress release cavity; when the clamping mouth clamps the expansion piece, the cross section of the expansion piece coincides with the axis of the connecting shaft.

[0007] In some embodiments, among the expansion seats arranged along the connecting axis on the expansion module, the front end of the outer expansion seat protrudes beyond the front end of the inner expansion seat; at least part of the front end of the expansion seat is configured with a slope, and the front end of the expansion seat on the expansion module is suitable for connecting with each other to form a convex outer and concave inner contact surface; the front end of the expansion piece on the outer expansion seat protrudes beyond the front end of the expansion piece on the inner expansion seat.

[0008] In some embodiments, the expansion seat is detachably provided with a first fastener that passes through both sides of the clamping port, and the first fastener is suitable for bringing the two sides of the clamping port closer to each other to clamp the expansion piece, and the expansion piece is provided with a connecting hole, and the first fastener is suitable for passing through the connecting hole to limit the expansion piece from detaching from the clamping port; at least part of the connecting holes on the expansion piece extend along the length direction of the expansion piece, so that the expansion piece is suitable for adjusting the length extending out of the clamping port and the length located in the stress release cavity; the front end of the expansion piece is provided with an arc portion, and the bending direction and plane of the arc portion are perpendicular to the axis of the connecting shaft.

[0009] In some embodiments, the control device includes a connecting seat, a push rod and an operating part. The connecting seat is fixedly connected to the rear part of the expansion seat of the first part, the push rod is arranged on the connecting seat, and the operating part is connected to one end of the push rod. The operating part is suitable for making the other end of the push rod move relative to the connecting seat to push the expansion seat of the second part to rotate relative to the expansion seat of the first part along the connecting axis; adjacent expansion seats are in contact with each other in directions other than rotation along the connecting axis; the distance from the push rod to the connecting axis is less than the distance from the front end of the expansion sheet to the connecting axis.

[0010] In some embodiments, the number of the expansion seats on the expansion module is at least three, and the outermost expansion seat of the expansion module is the expansion seat of the first part, and the expansion seat of the first part and the expansion seat of the second part are staggered on the connecting shaft; a recessed structure is provided at the rear of the expansion seat, and the recessed structure is suitable for accommodating the connecting seat, and the control device is suitable for rotating the expansion seat of the second part toward the opposite side of the recessed structure; a first plane is provided on the recessed structure, and the connecting seat is provided on the first plane, and the first plane coincides with the axis of the connecting shaft; the connecting seat is connected to the expansion seat of the first part by a second fastener, and the connection direction of the second fastener is the tangential direction of the connecting shaft, and the push rod is arranged along the tangential direction of the connecting shaft; the push rod and the connecting seat are threadedly connected, and the operating part is a handle structure, one end of the operating part is connected to the push rod, and the other end of the operating part extends to the outside of the push rod at least in the radial direction of the push rod.

[0011] In some embodiments, at least one connecting module is further included, and connecting parts are provided at both ends of the connecting module. The connecting module is suitable for connecting the two expansion modules through the two connecting parts. An elastic telescopic part is provided between the two connecting parts, and the elastic telescopic part is suitable for making the connecting module bend and / or telescope so that the connecting part is suitable for docking with the expansion module.

[0012] In some embodiments, a closed valve disc is further included, which is suitable for extending into the gap of the pipe interface opened by the expansion module; a through port is provided on the connecting module, and the connecting module is suitable for connecting two expansion modules along the circumference of the pipe, and when the connecting module and the expansion module are connected, the through port is suitable for guiding the closed valve disc into the gap; an extension portion is provided on one side of the closed valve disc, and a positioning block is provided on the end of the extension portion away from the closed valve disc, and after the closed valve disc enters the gap from the through port, the positioning block is suitable for interfering with the elastic telescopic portion of the connecting module.

[0013] In some embodiments, both ends of the connecting shaft protrude from the expansion module, the connecting portion is an elastic sleeve, and the connecting portion is suitable for nesting and connecting with the end of the connecting shaft; a hard support portion is provided between the connecting portion and the elastic telescopic portion.

[0014] A method for operating a pipe joint expansion device, comprising any of the above-mentioned pipe joint expansion devices, comprises the following steps:

[0015] S100, loosening the fastening connection between the two pipes, installing at least one expansion module, and manually or with the aid of a tool inserting an expansion piece of the expansion module into the interface gap between the two pipes along the radial direction of the pipes;

[0016] S200, operating the control device to drive at least one expansion seat to rotate relative to the other expansion seats, so that the expansion plate moves in the circumferential direction of the pipe to expand the interface gap between the two pipes;

[0017] S300, before or after the pipeline is expanded, adjusting the length and curvature of the connecting modules to connect at least some of the expansion modules, where the connected expansion modules include at least expansion modules that are prone to falling;

[0018] S400, after the pipeline is expanded, the closing valve disc is directly inserted into the interface gap between the two pipelines, or is inserted into the interface gap between the two pipelines through the through-port of the connecting module;

[0019] At step S500, after the closing valve disc extends into the interface gap between the two pipes through the through opening of the connecting module, the length and curvature of the connecting module are further adjusted so that the positioning block on the closing valve disc engages with the elastic expansion portion of the connecting module, thereby restricting the movement of the closing valve disc within the interface gap between the two pipes.

[0020] S600, remove the closed valve plate, operate the control device to restore the expansion module to its initial state, release the connection between some connecting modules and the expansion module, pull the expansion module out of the interface gap between the two pipes, and restore the tight connection between the two pipes.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The pipeline interface expansion device of the present application is provided with an expansion module and uses the lever principle to stably expand the interface gap between the two pipelines, thereby being able to close and cut off the pipeline without damaging the pipeline, facilitating the restoration of the pipeline, ensuring the stability of the pipeline system, and effectively increasing the operational safety of the staff.

[0023] 2. The operating method of the pipeline interface expansion device of the present application can stably expand the interface gap between the two pipelines through the expansion module, while increasing the stability of the connection module to assist the expansion module in the stages before and after expansion and the closing of the closing valve plate. Since the location of some pipeline interfaces is relatively hidden and can only be operated from one side of the pipeline, the probability of the expansion module and the closing valve plate falling and being lost can be effectively reduced through the connection module. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an overall structural view of the initial state of the expansion module according to a preferred embodiment of the present application.

[0025] Figure 2 It is an exploded structural view of the initial state of the expansion module according to a preferred embodiment of the present application.

[0026] Figure 3 It is a side view of the initial state of the expansion module according to a preferred embodiment of the present application.

[0027] Figure 4 It is a top view of the initial state of the expansion module according to a preferred embodiment of the present application.

[0028] Figure 5 This is an overall structural view of the expansion module in the expanded state according to a preferred embodiment of the present application.

[0029] Figure 6 It is a side view of the expansion module in the expanded state according to a preferred embodiment of the present application.

[0030] Figure 7 This is a schematic diagram of a state in which an expansion module is inserted between pipe connections according to a preferred embodiment of the present application.

[0031] Figure 8 This is a schematic diagram of the state when the expansion module is inserted into the pipeline connection according to a preferred embodiment of the present application.

[0032] Figure 9 This is a schematic diagram of the state of the expansion module when expanding the pipeline connection according to a preferred embodiment of the present application.

[0033] Figure 10 This is a schematic diagram of the use of an expansion module, a connection module and a closing valve plate according to a preferred embodiment of the present application.

[0034] Figure 11 This is a schematic diagram of a state in which an expansion module and a connection module are first connected, then inserted, and then expanded according to a preferred embodiment of the present application.

[0035] Figure 12 This is a schematic diagram of a state in which an expansion module and a connection module are first inserted, then connected, and then expanded according to a preferred embodiment of the present application.

[0036] In the figure: 1. Expansion module; 11. Expansion seat; 111. Clamping port; 112. Stress relief cavity; 113. Arc structure; 114. Inclined surface; 115. First fastener; 116. Recessed structure; 1161. First plane; 12. Expansion sheet; 121. Connecting hole; 122. Arc portion; 13. Connecting shaft; 14. Control device; 141. Connecting seat; 1411. Second fastener; 142. Push rod; 143. Operating portion; 2. Connecting module; 21. Connecting portion; 22. Elastic expansion portion; 23. Passing port; 3. Closed valve sheet; 31. Extension portion; 32. Positioning block; 4. Pipeline. DETAILED DESCRIPTION

[0037] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0038] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0039] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0040] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0041] The present application will be further described below with reference to the accompanying drawings:

[0042] like Figures 1 to 12 As shown, the present application provides a pipeline interface expansion device, including at least one expansion module 1, the expansion module 1 includes multiple expansion seats 11, multiple expansion pieces 12, a connecting shaft 13 and a control device 14, the expansion seat 11 is rotatably set on the connecting shaft 13, and a clamping opening 111 is opened at the front of the expansion seat 11, and the expansion pieces 12 are suitable for being installed one by one in the clamping opening 111, and a part of the expansion piece 12 extends from the clamping opening 111 to the front of the expansion seat 11, and the control device 14 is connected to the rear of the expansion seat 11, and the control device 14 is suitable for rotating at least one expansion seat 11 relative to the remaining expansion seats 11 along the connecting shaft 13, so that at least one expansion piece 12 is misaligned with the remaining expansion pieces 12 within the radial cross-section of the connecting shaft 13. It can also be understood that the front end of at least one expansion piece 12 is away from the front end of the remaining expansion pieces 12 within the radial cross-section of the connecting shaft 13. Since the front end of the expansion piece 12 is in contact with the pipe 4, the two pipes 4 can be pushed away from the connection point respectively when it is away.

[0043] like Figures 1 to 3 In the embodiment shown, the clamping opening 111 clamps both sides of the expansion piece 12 in the circumferential direction of the connecting shaft 13, and the clamping opening 111 is close to one end of the connecting shaft 13 (refer to Figure 3The upper and lower sides of the expansion piece 12 are clamped), and the stress relief cavity 112 is formed by extending outward on both sides of the circumference of the connecting shaft 13. The rear end of the expansion piece 12 is suitable for being accommodated in the stress relief cavity 112.

[0044] It can be understood that the design of the stress relief chamber 112 can reduce the length of the force arm when the front end of the expansion piece 12 transmits the force to the rear end, thereby reducing the distance from the front end of the expansion piece 12 to the point where bending is theoretically easy to occur. The shorter the distance, the higher the upper limit of the expansion piece 12 can withstand, which can effectively reduce the probability of the expansion piece 12 bending and breaking. At the same time, the direction of the force borne by the front end of the expansion piece 12 and the movable direction released by the rear end of the expansion piece 12 by the stress relief chamber 112 are somewhat coincident or parallel. The expansion piece 12 can use its rear end to produce the corresponding force in the stress relief chamber 112 when transmitting the force. The expansion piece 12 is provided with a plurality of expansion pieces 12, and the expansion piece 12 is provided with a plurality of expansion pieces 12. The expansion piece 12 is provided with a plurality of expansion pieces 12 and a plurality of expansion pieces 12 having a plurality of expansion pieces 12. The expansion piece 12 is provided with a plurality of expansion pieces 12 and a plurality of expansion pieces 12 having a plurality of expansion pieces 12. The expansion piece 12 is provided with a plurality of expansion pieces 12 and a plurality of expansion pieces 12 having a plurality of expansion pieces 12.

[0045] In some embodiments, the length of the front end of the expansion piece 12 extending from the clamping opening 111 is greater than the length of the rear end of the expansion piece 12 accommodated in the stress relief cavity 112 , which can improve the structural compactness of the expansion module 1 and facilitate the installation of the expansion module 1 .

[0046] like Figure 3 In the embodiment shown, the stress relief cavity 112 is extended along the circumference of the connecting shaft 13 so that the thickness of the expansion seat 11 between the stress relief cavity 112 and the connecting shaft 13 remains consistent, thereby ensuring the structural strength of the expansion seat 11 and reducing the probability of deformation.

[0047] like Figure 3 In the embodiment shown, an arc-shaped structure 113 transition is provided between the stress release cavity 112 and the clamping port 111. The arc-shaped structure 113 transition can reduce the point contact or line contact between the rear end of the expansion piece 12 and the clamping cavity, and reduce the point contact or line contact between the expansion piece 12 and the clamping cavity caused by its own slight deformation when the expansion piece 12 is subjected to a force, thereby making the bearing capacity of the expansion piece 12 more stable.

[0048] like Figures 1 to 6 In the embodiment shown, the rear end of the expansion piece 12 is aligned with the side wall of the stress relief cavity 112 (see Figure 3The expansion piece 12 is abutted against the side wall on the left side of the rear end of the expansion piece 12), which can improve the connection stability between the expansion piece 12 and the clamping mouth 111, and is used to support the expansion piece 12 and reduce the probability of relative movement between the expansion piece 12 and the clamping mouth 111.

[0049] In the present application, when the clamping mouth 111 clamps the expansion piece 12, the cross section of the expansion piece 12 coincides with the axis of the connecting shaft 13, and the expansion piece 12 can be inserted along the gap produced by the separation of the connection between the two pipes 4, which can effectively reduce the difficulty of matching the connection between the expansion piece 12 and the two pipes 4, so that the expansion piece 12 can pry open the connection between the two pipes 4 in the form of a seesaw.

[0050] like Figure 4 In the embodiment shown, among the expansion seats 11 arranged along the connecting axis 13 on the expansion module 1, the front end of the outer expansion seat 11 protrudes from the front end of the inner expansion seat 11. Since the pipe 4 is generally a circular structure, this design can make the front end of the outer expansion seat 11 closer to the connection of the pipe 4, so that the clamping port 111 at the front end of the expansion seat 11 and the expansion piece 12 in the clamping port 111 are also closer to the connection of the pipe 4, so as to reduce the difficulty of matching the connection between the outer expansion seat 11 and the pipe 4 and improve the matching stability.

[0051] like Figure 4 In the embodiment shown, the front end of at least part of the expansion seat 11 is provided with a bevel 114, and the front end of the expansion seat 11 on the expansion module 1 is suitable for connecting with each other to form a convex outer and concave inner contact surface. The bevel 114 can increase the contact area between the clamping opening 111 and the expansion piece 12, disperse the force, increase the upper limit of the expansion piece 12, and shorten the distance between the front end of the expansion piece 12 and the clamping opening 111, reducing the distance at which the expansion piece 12 is prone to deformation, thereby reducing the probability of deformation of the expansion piece 12.

[0052] like Figure 4 In the embodiment shown, the front end of at least part of the expansion seat 11 is configured with a curved surface, and the front end of the expansion seat 11 on the expansion module 1 is suitable for connecting with each other to form a convex and concave contact surface. The curved surface can increase the contact area between the clamping mouth 111 and the expansion piece 12, disperse the force, increase the upper limit of the expansion piece 12, and shorten the distance between the front end of the expansion piece 12 and the clamping mouth 111, reducing the distance at which the expansion piece 12 is prone to deformation, thereby reducing the probability of deformation of the expansion piece 12.

[0053] Specifically, the inclined surface 114 or curved surface may not be configured at the front end of the expansion seat 11 in the middle of the connecting shaft 13, but inclined surfaces 114 or curved surfaces may be configured at the front ends of the expansion seats 11 on both sides of the connecting shaft 13, so that the contact surface can fit as closely as possible to the curved surface of the side of the pipe 4, thereby increasing the space utilization outside the pipe 4.

[0054] It is worth noting that the outermost end of the inclined surface 114 or curved surface at the front end of the outermost expansion seat 11 is flattened. Since this part is relatively sharp, the flattening process can effectively reduce the point contact between this part and the expansion piece 12.

[0055] like Figure 4 In the embodiment shown, the front end of the expansion piece 12 on the outer expansion seat 11 protrudes from the front end of the expansion piece 12 on the inner expansion seat 11. Since the pipe 4 is generally a circular structure, this design can ensure that the length of the gap at the connection of the expansion piece 12 on each expansion seat 11 entering the pipe 4 meets the minimum length requirement, so that the gap can be expanded to the target width, making it convenient for staff to perform drainage and sealing operations.

[0056] like Figure 2 In the embodiment shown, the expansion seat 11 is detachably provided with a first fastener 115 that passes through both sides of the clamping opening 111. The first fastener 115 is suitable for bringing the two sides of the clamping opening 111 close to each other to clamp the expansion piece 12. A connecting hole 121 is provided on the expansion piece 12. The first fastener 115 is suitable for passing through the connecting hole 121 to limit the expansion piece 12 from being separated from the clamping opening 111. The connecting hole 121 can increase the bonding strength between the expansion piece 12 and the clamping opening 111, reduce the movement between the expansion piece 12 and the clamping opening 111, and enable the clamping opening 111 and the expansion piece 12 to maintain surface contact as much as possible during the expansion process, thereby reducing the probability of deformation of the expansion piece 12.

[0057] In some embodiments, the first fastener 115 is a bolt.

[0058] In some embodiments, at least a portion of the connection holes 121 on the expansion piece 12 extend along the length direction of the expansion piece 12 to form a waist-shaped hole, so that the expansion piece 12 is suitable for adjusting the length extending out of the clamping port 111 and the length located in the stress release cavity 112. In actual use, the position of the expansion piece 12 in the clamping port 111 can be adjusted according to needs.

[0059] like Figure 2 and 4 In the embodiment shown, the connection hole 121 on the expansion piece 12 on the outside of the expansion module 1 extends along the length direction of the expansion piece 12. For example, when encountering a pipe 4 with a smaller diameter, the outer expansion piece 12 can be moved forward of the clamping opening 111, thereby ensuring that the length of the gap at the connection where the outer expansion piece 12 enters the pipe 4 meets the minimum length requirement.

[0060] like Figures 1 to 6In the illustrated embodiment, an arcuate portion 122 is provided at the front end of the expansion piece 12. The bending direction and the plane of the arcuate portion 122 are perpendicular to the axis of the connecting shaft 13. The arcuate portion 122 can reduce the structural interference between the expansion piece 12 and the pipes 4 on both sides when the expansion piece 12 is inserted into the gap, thereby reducing the difficulty of inserting the expansion piece 12 into the gap. At the same time, it can increase the contact area between the front end of the expansion piece 12 and the pipe 4 when the expansion piece 12 is expanded, so that the expansion piece 12 and the pipe 4 are suitable for forming at least a line contact fit, thereby reducing the probability of deformation and damage caused by compression of the front end of the expansion piece 12.

[0061] like Figures 1 to 6 In the illustrated embodiment, the control device 14 includes a connecting seat 141, a push rod 142 and an operating part 143. The connecting seat 141 is fixedly connected to the rear portion of the expansion seat 11 of the first part, the push rod 142 is arranged on the connecting seat 141, and the operating part 143 is connected to one end of the push rod 142. The operating part 143 is suitable for making the other end of the push rod 142 move relative to the connecting seat 141 to push the expansion seat 11 of the second part to rotate relative to the expansion seat 11 of the first part along the connecting axis 13. Under the joint blocking and limiting action of the push rod 142 and the connecting seat 141, the expansion seat 11 of the second part will not rotate toward the direction of the expansion seat 11 of the first part after rotation, so the expansion pieces 12 at the front end will not approach each other and close. It can be understood that the control device 14 uses the connecting seat 141 and the push rod 142 to enable the expansion seat 11 to realize a structural principle similar to that of a jack or a crowbar to push open (pry open) the gap at the connection between the two pipes 4. The structure is simple and stable, and the production cost is low.

[0062] In some embodiments, the push rod 142 and the connecting seat 141 are threadedly connected, and the operating part 143 is a handle structure (it can also be a handle structure, a handwheel structure, etc.), one end of the operating part 143 is connected to the push rod 142, and the other end of the operating part 143 extends at least radially toward the outside of the push rod 142, so that the operating part 143 can be rotated by the staff, thereby driving the push rod 142 to rotate, and utilizing the threaded connection between the push rod 142 and the connecting seat 141, the push rod 142 realizes screw movement, so that the push rod 142 can be stably ejected from the connecting seat 141.

[0063] In some embodiments, during the rotation of the operating portion 143 , the outermost end does not protrude beyond the front end of the expansion piece 12 , so as to reduce structural interference between the operating portion 143 and the pipe 4 during the expansion process.

[0064] like Figure 1 、 4In the embodiment shown in , 5, adjacent expansion seats 11 interfere with each other in directions other than the rotation along the connecting shaft 13, so that the adjacent expansion seats 11 can use their own structural interference to limit the movement, reduce the movement in directions other than the rotation along the connecting shaft 13, and enhance the guiding effect of the movement in directions other than the rotation along the connecting shaft 13, thereby improving the overall structural stability and overall structural strength.

[0065] In some embodiments, the number of expansion seats 11 on the expansion module 1 is at least three, and the outermost expansion seat 11 of the expansion module 1 is the expansion seat 11 of the first part. The expansion seat 11 of the first part and the expansion seat 11 of the second part are staggered on the connecting shaft 13 to ensure that adjacent expansion seats 11 use their own structural interference to restrict the movement effect, and at the same time, can improve the uniformity of the expansion force applied to the two pipes 4, and can also make the force on both sides of the expansion module 1 more symmetrical and uniform, thereby improving the stability of the expansion module 1.

[0066] like Figures 1 to 6 In the embodiment shown, there are three expansion seats 11 on the expansion module 1, the expansion seats 11 of the first part are located on both sides, and the expansion seat 11 of the second part is located in the middle. The connecting seat 141 is fixedly connected to the expansion seats 11 of the first part on both sides, and the ejector rod 142 ejects the expansion seat 11 of the second part in the middle, which can effectively ensure the overall structural strength during jacking while making the structure more compact and conveniently adapting to pipes 4 of different diameters and more operating environments.

[0067] like Figure 3 and 6 In the embodiment shown, the distance from the push rod 142 to the connecting shaft 13 is smaller than the distance from the front end of the expansion piece 12 to the connecting shaft 13, which can increase the movable distance ratio of the front end of the expansion piece 12 and reduce the operation amount required by the control operating part 143 to move the push rod 142 under the same expansion distance.

[0068] like Figures 1 to 3 In the embodiments shown in Figures 5 to 6, a recessed structure 116 is provided at the rear of the expansion seat 11. The recessed structure 116 is suitable for accommodating the connecting seat 141. The control device 14 is suitable for rotating the second part of the expansion seat 11 toward the opposite side of the recessed structure 116. The design of the recessed structure 116 can hide part of the control device 14, thereby improving the overall structural compactness and lightweight, and facilitating adaptation to more operating environments.

[0069] like Figure 3 and 6In the embodiment shown, a first plane 1161 is provided on the recessed structure 116, and the connecting seat 141 is provided on the first plane 1161. The first plane 1161 coincides with the axis of the connecting shaft 13. The first plane 1161 is used to improve the connection stability between the connecting seat 141 and the expansion seat 11, so that the connecting seat 141 and the expansion seat 11 fit more closely, and at the same time can guide the force conduction between the two, reduce the shearing of the threaded fasteners between the connecting seat 141 and the expansion seat 11, thereby improving the overall structural strength and reducing the probability of deformation and separation of the connecting seat 141 and the expansion seat 11.

[0070] like Figure 3 and 6 In the embodiment shown, the connecting seat 141 is connected to the expansion seat 11 of the first part through a second fastener 1411, and the connection direction of the second fastener 1411 is the tangential direction of the connecting axis 13. Combined with the first plane 1161, it can guide the force transmission between the connecting seat 141 and the expansion seat 11 of the first part, reduce the shearing of the second fastener 1411, thereby improving the overall structural strength and reducing the probability of deformation and separation of the connecting seat 141 and the expansion seat 11.

[0071] In some embodiments, the second fastener 1411 is a bolt.

[0072] like Figure 3 and 6 In the embodiment shown, the push rod 142 is arranged along the tangential direction of the connecting shaft 13, so that the force direction of the push rod 142 can be perpendicular to the surface of the expansion seat 11 during the initial expansion stage of the expansion device, thereby producing a more stable structural fit, reducing the probability of deformation of the push rod 142, so as to achieve a more stable expansion effect, and also reducing the probability of slippage between the push rod 142 and the expansion seat 11 during the initial expansion stage.

[0073] like Figures 10 to 12 The illustrated embodiment further includes at least one connecting module 2, and connecting parts 21 are provided at both ends of the connecting module 2. The connecting module 2 is suitable for connecting two expansion modules 1 through the two connecting parts 21. An elastic telescopic part 22 is provided between the two connecting parts 21. The elastic telescopic part 22 is suitable for bending and / or telescoping the connecting module 2 so that the connecting part 21 is suitable for docking with the expansion module 1. Since the operating environment for the expansion of the pipeline 4 is diverse, some places are relatively narrow and deep. If the expansion module 1 accidentally falls during the expansion process, it is difficult for the staff to pick it up and recycle it. Therefore, the connecting module 2 can be adaptively connected to connect the two expansion modules 1, thereby improving the use stability of the expansion module 1. Even if one expansion module 1 becomes loose, the other expansion module 1 can assist the loose expansion module 1 to stabilize it, thereby reducing the probability of the expansion module 1 accidentally falling during the expansion process.

[0074] In some embodiments, the elastic expansion portion 22 may be a structure such as a bellows.

[0075] like Figures 10 to 12 The embodiment shown also includes a closing valve disc 3, which is suitable for extending into the interface gap of the pipeline 4 opened by the expansion module 1. By inserting the closing valve disc 3 into the gap, it can achieve the closure of the pipeline 4 on one side or the simultaneous closure of the pipelines 4 on both sides.

[0076] like Figure 10 In the embodiment shown, a through port 23 is provided on the connecting module 2, and the connecting module 2 is suitable for connecting two expansion modules 1 along the circumference of the pipeline 4. When the connecting module 2 and the expansion module 1 are connected, the through port 23 is suitable for guiding the closed valve plate 3 into the gap, thereby reducing the difficulty of the closed valve plate 3 entering the gap, improving the smoothness, and reducing the probability of the closed valve plate 3 falling off during the insertion process of the gap.

[0077] like Figures 10 to 12 In the illustrated embodiment, an extension portion 31 is provided on one side of the closing valve disc 3 , and a worker can insert the closing valve disc 3 into the gap and pull it out through the extension portion 31 .

[0078] like Figure 12 In the embodiment shown, a positioning block 32 is provided at one end of the extension portion 31 away from the closed valve disc 3. After the closed valve disc 3 enters the gap from the through port 23, the positioning block 32 is suitable for interfering with the elastic telescopic portion 22 of the connecting module 2. It can be understood that the positioning block 32 can limit the further entry of the closed valve disc 3 into the gap, and the deformation of the elastic telescopic portion 22 can change and limit the position of the closed valve disc 3 entering the gap, thereby playing a role of stable cooperation. In addition, the positioning block 32 can also cooperate with the elastic telescopic portion 22 to play a role of preventing falling. For example, when the staff can only operate above the pipeline 4, the elastic telescopic portion 22 can be bent, and the positioning block 32 can be placed in the bent position, so that the closed valve disc 3 is positioned in a hanging manner. At this time, the staff no longer needs to maintain the state of the closed valve disc 3 and can perform other operations.

[0079] In some embodiments, at least part of the through opening 23 is opened on the elastic telescopic portion 22. It is worth noting that before the closing valve plate 3 is inserted into the through opening 23, the through opening 23 of the elastic telescopic portion 22 needs to be adjusted to the plane where the gap is located.

[0080] like Figures 10 to 12 In the embodiment shown, both ends of the connecting shaft 13 protrude from the expansion module 1, and the connecting portion 21 is an elastic sleeve (which can be made of silicone, rubber, etc.). The connecting portion 21 is suitable for being nested and connected with the end of the connecting shaft 13, and the connection is made using the original structure of the expansion module 1. The connection method is simple and stable, and no new structure is required, which can reduce production difficulty and cost.

[0081] In some embodiments, both ends of the connecting shaft 13 are generally locked using a bolt structure, and the connecting portion 21 can be nested and connected to the bolt structure.

[0082] In some embodiments, a hard support portion is provided between the connecting portion 21 and the elastically retractable portion 22 to isolate the deformation effect between the connecting portion 21 and the elastically retractable portion 22 so that the functions of the two are independent of each other, thereby improving the stability of the connecting module 2.

[0083] like Figures 7 to 12 As shown, the present application also provides an operating method of a pipeline interface expansion device, including the pipeline interface expansion device of any of the above embodiments, comprising the following steps.

[0084] S100, loosen the fastening connection between the two pipes 4, for example, loosen the fastening bolts, so that the two pipes 4 can be separated from each other, thereby opening a gap at the interface between the two pipes 4, and set at least one expansion module 1. Manually or with the help of a tool, the expansion piece 12 of the expansion module 1 is embedded in the interface gap between the two pipes 4 along the radial direction of the pipes 4.

[0085] The number and arrangement spacing of the expansion modules 1 can be configured according to the diameter of the pipeline 4, the surrounding environment and the tightness of the connection of the pipeline 4. Generally, no less than three expansion modules are required.

[0086] In this step, according to actual needs, the connection holes 121 on the expansion pieces 12 can be used to move some of the expansion pieces 12 on the expansion seat 11 out of the clamping opening 111 .

[0087] S200 , operating the control device 14 , rotating the operating portion 143 , driving at least one expansion seat 11 to rotate relative to the other expansion seats 11 , so that the expansion piece 12 moves in the circumferential direction of the pipe 4 to expand the interface gap between the two pipes 4 .

[0088] It is worth noting that when operating one expansion module 1 to expand the pipeline 4, the pipelines 4 at the other expansion modules 1 may become tighter. Therefore, the expansion modules 1 can be operated in sequence to perform small expansions, which can make the pressure at various positions of the pipeline 4 more stable and the expansion process safer and more stable.

[0089] S300 , before or after the pipe 4 is expanded, adjusting the length and curvature of the connection module 2 , and connecting at least some of the expansion modules 1 , wherein the expansion modules 1 to be connected include at least the expansion modules 1 that are prone to falling.

[0090] It is understandable that when operating one expansion module 1 to expand the pipe 4, the pipes 4 at the other expansion modules 1 may become tighter, or may become loose and dislocated. At this time, the use of the connecting module 2 can effectively reduce the probability of the expansion module 1 falling, especially the expansion module 1 located below the pipe 4. The expansion module 1 only relies on the interface gap between the two pipes 4 to clamp the expansion piece 12. If looseness and dislocation occur, the expansion module 1 is very easy to fall. If it is located in a small environment, it will be lost. If it falls into the pipe 4 system, it may even affect the normal operation of the pipe 4 system. In addition, the connecting module 2 can be used to improve the stability of the expansion module 1, maintain the relative state between the expansion module 1 and the pipe 4, avoid deflection, and ensure the normal progress of subsequent expansion operations.

[0091] S400 , after the pipelines 4 are expanded, the closing valve plate 3 is directly extended into the interface gap between the two pipelines 4 , or is extended into the interface gap between the two pipelines 4 through the through port 23 of the connecting module 2 .

[0092] This step can be based on actual needs. For example, if the pipeline 4 is arranged vertically and the operating environment is good, you can choose to directly use the closed valve plate 3. If the pipeline 4 is arranged horizontally and the operating environment is poor, using the closed valve plate 3 in combination with the connecting module 2 can prevent the closed valve plate 3 from falling.

[0093] S500, after the closing valve disc 3 extends into the interface gap between the two pipes 4 through the through port 23 of the connecting module 2, the length and bending degree of the connecting module 2 are further adjusted so that the positioning block 32 on the closing valve disc 3 is in conflict with the elastic telescopic part 22 of the connecting module 2, thereby limiting the movement of the closing valve disc 3 in the interface gap between the two pipes 4.

[0094] This step can be used to position the closing valve plate 3 on the connecting module 2 (see Figure 12 The valve disc 3 is closed in the middle), so that the staff can further free their hands to perform other operations.

[0095] S600, remove the closed valve plate 3, operate the control device 14, restore the expansion module 1 to its initial state, release the connection between the partial connection module 2 and the expansion module 1, pull the expansion module 1 out of the interface gap between the two pipes 4, and restore the tight connection between the two pipes 4.

[0096] During the process of releasing the connection between the connecting module 2 and the expansion module 1, the expansion module 1 that is easy to fall and the expansion module 1 that is not easy to fall can still maintain the connection of the connecting module 2. By taking out the expansion module 1 that is not easy to fall, the expansion module 1 that is easy to fall can be directly taken out.

[0097] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and the specification only describe the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application to be protected, and the scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A pipe joint expansion device, characterized in that: The expansion module comprises at least one expansion module, the expansion module comprising a plurality of expansion seats, a plurality of expansion pieces, a connecting shaft, and a control device. The expansion seats are rotatably mounted on the connecting shaft. A clamping opening is formed at the front of the expansion seat. The expansion pieces are adapted to be fitted one by one into the clamping opening. A portion of the expansion pieces extends from the clamping opening to the front of the expansion seat. The control device is connected to the rear of the expansion seat and adapted to rotate at least one of the expansion seats relative to the remaining expansion seats along the connecting shaft so that at least one of the expansion pieces is misaligned with the remaining expansion pieces within a radial cross-section of the connecting shaft. The clamping opening clamps both sides of the expansion piece in the circumferential direction of the connecting shaft. The clamping opening is close to one end of the connecting shaft and extends outward on both sides of the circumferential direction of the connecting shaft to form a stress relief cavity. The rear end of the expansion piece is suitable for being accommodated in the stress relief cavity.

2. A pipe joint expansion device according to claim 1, characterized in that: The stress release cavity is extended along the circumference of the connecting shaft; an arc-shaped structure transition is provided between the stress release cavity and the clamping opening; the rear end of the expansion piece abuts against the side wall of the stress release cavity; when the clamping opening clamps the expansion piece, the cross section of the expansion piece coincides with the axis of the connecting shaft.

3. The pipe joint expansion device according to claim 1, characterized in that: In the expansion seats arranged along the connecting axis on the expansion module, the front end of the outer expansion seat protrudes from the front end of the inner expansion seat; the front end of at least part of the expansion seat is configured with an inclined surface, and the front ends of the expansion seats on the expansion module are suitable for connecting with each other to form a convex outer and concave inner contact surface; the front end of the expansion piece on the outer expansion seat protrudes from the front end of the expansion piece on the inner expansion seat.

4. A pipe joint expansion device according to claim 3, characterized in that: The expansion seat is detachably provided with a first fastener that passes through both sides of the clamping opening. The first fastener is suitable for bringing the two sides of the clamping opening closer to each other to clamp the expansion piece. The expansion piece is provided with a connecting hole, and the first fastener is suitable for passing through the connecting hole to limit the expansion piece from being separated from the clamping opening; at least part of the connecting holes on the expansion piece extend along the length direction of the expansion piece, so that the expansion piece is suitable for adjusting the length extending out of the clamping opening and the length located in the stress release cavity; the front end of the expansion piece is provided with an arc portion, and the bending direction and plane of the arc portion are perpendicular to the axis of the connecting shaft.

5. The pipe joint expansion device according to claim 1, characterized in that: The control device includes a connecting seat, a push rod and an operating part. The connecting seat is fixedly connected to the rear part of the expansion seat of the first part. The push rod is arranged on the connecting seat. The operating part is connected to one end of the push rod. The operating part is suitable for making the other end of the push rod move relative to the connecting seat to push the expansion seat of the second part to rotate relative to the expansion seat of the first part along the connecting axis; adjacent expansion seats are mutually abutted and engaged in directions other than rotation along the connecting axis; the distance from the push rod to the connecting axis is less than the distance from the front end of the expansion piece to the connecting axis.

6. The pipe joint expansion device according to claim 5, characterized in that: The number of expansion seats on the expansion module is at least three, the outermost expansion seat of the expansion module is the expansion seat of the first part, and the expansion seats of the first part and the second part are staggered on the connecting shaft; a recessed structure is provided at the rear of the expansion seat, and the recessed structure is suitable for accommodating the connecting seat, and the control device is suitable for rotating the expansion seat of the second part toward the opposite side of the recessed structure; a first plane is provided on the recessed structure, and the connecting seat is provided on the first plane, and the first plane coincides with the axis of the connecting shaft; the connecting seat and the expansion seat of the first part are connected by a second fastener, and the connection direction of the second fastener is the tangential direction of the connecting shaft, and the push rod is arranged along the tangential direction of the connecting shaft; the push rod and the connecting seat are threadedly connected, and the operating part is a handle structure, one end of the operating part is connected to the push rod, and the other end of the operating part extends to the outside of the push rod at least in the radial direction of the push rod.

7. The pipe joint expansion device according to claim 1, characterized in that: It also includes at least one connecting module, and connecting parts are provided at both ends of the connecting module. The connecting module is suitable for connecting two expansion modules through the two connecting parts. An elastic telescopic part is provided between the two connecting parts, and the elastic telescopic part is suitable for making the connecting module bend and / or stretch so that the connecting part is suitable for docking with the expansion module.

8. The pipe joint expansion device according to claim 7, characterized in that: It also includes a closed valve disc, which is suitable for extending into the pipeline interface gap opened by the expansion module; a through port is provided on the connecting module, and the connecting module is suitable for connecting two expansion modules along the circumference of the pipeline, and when the connecting module and the expansion module are connected, the through port is suitable for guiding the closed valve disc into the gap; an extension portion is provided on one side of the closed valve disc, and a positioning block is provided on the end of the extension portion away from the closed valve disc, and after the closed valve disc enters the gap from the through port, the positioning block is suitable for interfering with the elastic telescopic portion of the connecting module.

9. The pipe joint expansion device according to claim 7, characterized in that: Both ends of the connecting shaft protrude from the expansion module. The connecting portion is an elastic sleeve, which is suitable for being nested and connected with the end of the connecting shaft. A hard supporting portion is provided between the connecting portion and the elastic telescopic portion.

10. A method for operating a pipe joint expansion device, characterized in that: The pipe joint expansion device according to claim 8 comprises the following steps: S100, loosening the fastening connection between the two pipes, installing at least one expansion module, and manually or with the aid of a tool inserting an expansion piece of the expansion module into the interface gap between the two pipes along the radial direction of the pipes; S200, operating the control device to drive at least one expansion seat to rotate relative to the other expansion seats, so that the expansion plate moves in the circumferential direction of the pipe to expand the interface gap between the two pipes; S300, before or after the pipeline is expanded, adjusting the length and curvature of the connecting modules to connect at least some of the expansion modules, where the connected expansion modules include at least expansion modules that are prone to falling; S400, after the pipeline is expanded, the closing valve disc is directly inserted into the interface gap between the two pipelines, or is inserted into the interface gap between the two pipelines through the through-port of the connecting module; At step S500, after the closing valve disc extends into the interface gap between the two pipes through the through opening of the connecting module, the length and curvature of the connecting module are further adjusted so that the positioning block on the closing valve disc engages with the elastic expansion portion of the connecting module, thereby restricting the movement of the closing valve disc within the interface gap between the two pipes. S600, remove the closed valve plate, operate the control device to restore the expansion module to its initial state, release the connection between some connecting modules and the expansion module, pull the expansion module out of the interface gap between the two pipes, and restore the tight connection between the two pipes.

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