Rear wheel adjusting mechanism of aligning device in pipeline

Abstract

The utility model provides a rear wheel adjusting mechanism of a pipeline internal aligning device, and relates to the technical field of pipeline internal aligning devices, and the adjusting mechanism comprises a rear wheel support, a pin shaft and a connecting rod assembly. The rear wheel bracket comprises a first part and a second part, and the first part is connected with a rear wheel of the inner clamp. The first part and the second part are connected with each other to form an L shape, the pin shaft penetrates through the joint of the first part and the second part, and the pin shaft is connected with a rack of the inner aligning device. The connecting rod assembly is connected with the second part, extends to the end, away from the rear wheel support, of the rack of the inner aligning device and is used for pushing the first part and the second part to rotate around the pin shaft, and the rear wheel can be directly adjusted through external operation. According to the design, the adjusting process is greatly simplified, the construction time is shortened, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline inner splicing device, in particular to a rear wheel adjusting mechanism of pipeline inner splicing device. BACKGROUND

[0002] With the continuous progress of modern engineering technology, the application of pipeline inner splicing device in various pipeline construction is becoming more and more widespread. This device plays a crucial role in the process of pipeline splicing, installation and maintenance, greatly improving the construction efficiency and quality. However, with the increasing frequency of use, the convenience of using the pipeline inner splicing device is also put forward higher and higher requirements, especially in the key link of adjusting the center of the inner splicing device to coincide with the center of the pipeline, the problem is particularly prominent.

[0003] In the traditional operation mode, in order to ensure the center of the inner splicing device coincides with the center of the pipeline, the construction personnel often need to adjust the height of the rear wheel of the inner splicing device. However, this adjustment process is not simple. Since the rear wheel is located at the rear of the inner splicing device and deep inside the pipeline, when adjusting the height, the construction personnel has to move the entire inner splicing device out of the pipeline. This not only needs to consume a lot of time and manpower, but also may cause delay to the entire construction progress. And sometimes one adjustment cannot achieve the desired effect, the construction personnel may need to carry out repeated operations of moving out, adjusting and moving in again, which undoubtedly further increases the difficulty and complexity of construction.

[0004] In addition, this frequent moving in and out operation may also cause certain damage to the inner splicing device itself, such as wear and deformation, thereby affecting its service life and performance. At the same time, for some large or complex pipeline construction projects, the moving in and out of the inner splicing device may also need to rely on professional hoisting equipment, which undoubtedly increases the cost and risk of construction. SUMMARY

[0005] The present application provides a rear wheel adjusting mechanism of pipeline inner splicing device, which aims to solve the problem that the existing inner splicing device needs to move the entire device out of the pipeline to adjust the rear wheel.

[0006] The present application provides a rear wheel adjusting mechanism of pipeline inner splicing device, which aims to solve the problem that the existing inner splicing device needs to move the entire device out of the pipeline to adjust the rear wheel.

[0007] The rear wheel support includes a first part and a second part, the first part is connected with the rear wheel of the inner splicing device;

[0008] The first part and the second part are connected with each other, and the first part and the second part are L-shaped as a whole, the pin shaft is arranged at the connection between the first part and the second part, and the pin shaft is connected with the frame of the inner splicing device;

[0009] The connecting rod assembly is connected with the second part, and the connecting rod assembly extends to the end of the frame of the inner mouthpiece far from the rear wheel support, and the connecting rod assembly is used to drive the second part to move, so as to drive the first part to rotate through the pin shaft.

[0010] Optionally, the connecting rod assembly comprises a transmission shaft, an adjusting screw rod and a connecting rod.

[0011] The transmission shaft penetrates the second part, and a through hole is formed in the transmission shaft, the adjusting screw rod penetrates into the through hole, and the adjusting screw rod is threadedly connected with the through hole.

[0012] The connecting rod is connected with the end of the adjusting screw rod far from the transmission shaft, and the connecting rod extends to the end of the frame of the inner mouthpiece far from the rear wheel support.

[0013] The connecting rod is used to drive the adjusting screw rod to rotate.

[0014] Optionally, the end of the connecting rod far from the adjusting screw rod is provided with a connecting head, and the end of the connecting head far from the connecting rod is provided in a polygonal shape.

[0015] Optionally, the connecting head and the connecting rod are detachably connected.

[0016] Optionally, a fixing seat is rotatably sleeved on the connecting head, and the fixing seat is fixedly connected with the frame of the inner mouthpiece.

[0017] Optionally, a first universal coupling is connected between the adjusting screw rod and the connecting rod, and a second universal coupling is arranged between the connecting head and the connecting rod.

[0018] The first universal coupling is detachably connected with the adjusting screw rod, and the first universal coupling is fixedly connected with the connecting rod.

[0019] The second universal coupling is detachably connected with the connecting head, and the second universal coupling is fixedly connected with the connecting rod.

[0020] Optionally, a positioning assembly is arranged on the adjusting screw rod.

[0021] The positioning assembly comprises a sleeve ring and a support plate, the sleeve ring is rotatably sleeved on the adjusting screw rod, the support plate is connected with the outer side of the sleeve ring, and the support plate is fixedly connected with the frame of the inner mouthpiece.

[0022] Optionally, the sleeve ring is provided with a stepped inner hole, the outer side of the adjusting screw rod is provided with a protrusion matched with the stepped inner hole, and the sleeve ring is provided with a pressing plate capable of abutting against the protrusion at the outlet of the stepped inner hole.

[0023] Advantages:

[0024] The application provides a rear wheel adjusting mechanism of an in-pipe aligning device, which allows an operator to directly adjust the rear wheel through external operation without moving the aligning device out. This design greatly simplifies the adjustment process, shortens the construction time, and improves the work efficiency. Through the cooperation of the adjusting screw and the transmission shaft, and the transmission of the connecting rod and the universal coupling, the mechanism can realize accurate rear wheel height adjustment. This high-precision adjustment method helps to ensure the coincidence of the center of the in-pipe aligning device and the center of the pipeline, improves the construction quality, and the operator only needs to operate outside the pipeline, which greatly reduces the construction risk. Since the adjusting mechanism has a simple structure and is easy to operate, the possibility of failure during use is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0026] Figure 1 is a front view of a rear wheel adjusting mechanism of an in-pipe aligning device according to an embodiment of the application;

[0027] Figure 2 is a top view of a rear wheel adjusting mechanism of an in-pipe aligning device according to an embodiment of the application;

[0028] Figure 3 is a sectional view of A-A in Figure 2

[0029] Figure 4 is a structural schematic view of a transmission shaft in a rear wheel adjusting mechanism of an in-pipe aligning device according to an embodiment of the application;

[0030] Figure 5 is a structural schematic view of an adjusting screw in a rear wheel adjusting mechanism of an in-pipe aligning device according to an embodiment of the application;

[0031] Figure 6 is a structural schematic view of a sleeve ring in a rear wheel adjusting mechanism of an in-pipe aligning device according to an embodiment of the application;

[0032] Figure 7 is a sectional view of B-B in Figure 6

[0033] Figure 8 ​​is a structure diagram of a connecting head in a rear wheel adjusting mechanism of an in-pipe aligning device according to an embodiment of the present application;

[0034] Figure 9 is a structure diagram of a fixed seat in a rear wheel adjusting mechanism of an in-pipe aligning device according to an embodiment of the present application;

[0035] The reference signs are explained as follows: rear wheel support 1, first part 101, second part 102, pin shaft 2, transmission shaft 3, through hole 31, adjusting screw rod 4, external thread 41, screw rod interface 42, pressing plate 5, collar 6, stepped inner hole 61, support plate 7, first universal coupling 8, connecting rod 9, second universal coupling 10, fixed seat 11, circular ring 111, connecting head 12, abutting interface 121, rotating head 122. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] As shown in Figures 1-2 , a rear wheel adjusting mechanism of an in-pipe aligning device, the adjusting mechanism comprising a rear wheel support 1, a pin shaft 2 and a connecting rod assembly;

[0038] The rear wheel support 1 comprises a first part 101 and a second part 102, and the first part 101 is connected with the rear wheel of the in-pipe aligning device;

[0039] The first part 101 and the second part 102 are connected with each other, and the first part 101 and the second part 102 are in an L shape as a whole, the pin shaft 2 is arranged at the connection between the first part 101 and the second part 102, and the pin shaft 2 is connected with the frame of the in-pipe aligning device;

[0040] The connecting rod assembly is connected with the second part 102, and the connecting rod assembly extends to the end of the frame of the in-pipe aligning device away from the rear wheel support 1, and the connecting rod assembly is used to drive the second part 102 to move, so as to drive the first part 101 to rotate through the pin shaft.

[0041] As shown in Figure 3As shown, in the embodiment, the entire adjusting mechanism is connected with the frame of the inner adapter, and can be regarded as a connecting and adjusting component between the rear wheel support 1 and the frame of the inner adapter. Specifically, the first part 101 is a part of the rear wheel support 1 directly connected with the rear wheel of the inner adapter, and serves to support and fix the rear wheel. The second part 102 is another part of the rear wheel support 1 connected with the first part 101, and serves to connect the first part 101 and the connecting rod assembly. The pin shaft 2 is a component of the rear wheel support 1 connecting the first part 101 and the second part 102, and is arranged at the connection between the first part 101 and the second part 102, serving as a hinge, and the first part 101 and the second part 102 can rotate around the pin shaft 2.

[0042] In the embodiment, the first part 101 and the second part 102 are connected in an L shape, so as to enhance the structural stability and adjustment flexibility of the rear wheel support 1. The L-shaped structure can provide additional support force, so that the rear wheel support 1 is more stable when bearing the weight of the rear wheel and the force generated during adjustment. Meanwhile, the L-shaped structure also makes the rotational adjustment of the rear wheel support 1 more smooth, because the pin shaft 2 is arranged at the connection of the L-shaped structure and serves as a rotating hinge, and the L-shaped structure can better guide and adjust the height and angle of the rear wheel.

[0043] The connecting rod assembly is used to directly push the second part 102, so as to rotate the first part 101 and the second part 102 around the pin shaft 2. Meanwhile, the connecting rod assembly extends to the end of the frame of the inner adapter away from the rear wheel support 1 (i.e. the end of the inner adapter equipped with the front wheel, which is generally close to the pipe opening and is also a region convenient for direct operation), so that the operator can adjust the height of the rear wheel from the front end without moving the entire inner adapter. The operator can easily complete the adjustment of the height of the rear wheel without moving the inner adapter out of the pipe, which greatly saves time and labor cost.

[0044] The pin shaft 2 is connected to the first part 101 and the second part 102 of the rear wheel support 1 as a hinge point, and the two parts are connected to each other in an L-shaped arrangement. When the height of the rear wheel needs to be adjusted, the second part 102 (and the first part 101 connected thereto) can be pushed to rotate around the pin shaft 2 by operating the connecting rod assembly. This rotating movement can change the overall angle of the rear wheel support 1, thereby achieving the adjustment of the height of the rear wheel without the need to remove the inner mouthpiece from the pipe. The traditional method of adjusting the rear wheel requires the inner mouthpiece to be removed from the pipe, which is very inconvenient. The relative rotation achieved by the pin shaft 2 and the connecting rod assembly extending to the end of the inner mouthpiece where the front wheel is assembled can be adjusted without moving the inner mouthpiece. The rotating movement enables the rear wheel support 1 to flexibly adapt to different height requirements, improving the accuracy and efficiency of the adjustment.

[0045] As shown in Figures 4-5 , in particular, the connecting rod assembly includes a transmission shaft 3, an adjusting screw rod 4, and a connecting rod 9.

[0046] The transmission shaft 3 is rotatably arranged in the second part 102, and the transmission shaft 3 is provided with a through hole 31. The adjusting screw rod 4 is provided with an external thread 41, which matches the through hole 31. The adjusting screw rod 4 is screwedly arranged in the through hole 31.

[0047] The connecting rod 9 is connected to the end of the adjusting screw rod 4 away from the transmission shaft 3, and the connecting rod 9 extends to the end of the rack of the inner mouthpiece away from the rear wheel support 1.

[0048] As shown in Figure 5 , in an optional embodiment, the connecting rod 9 is provided with a first notch, and the adjusting screw rod 4 is provided with a screw rod interface 42 corresponding to the first notch of the connecting rod 9. The first notch of the connecting rod 9 and the screw rod interface 42 match each other, thereby realizing continuous connection and facilitating maintenance and installation.

[0049] The transmission shaft 3 is a component connecting the second part 102 of the rear wheel support 1 and the adjusting screw rod 4. It is rotatably arranged in the second part 102 of the rear wheel support 1 and is provided with the through hole 31 for matching the external thread 41 of the adjusting screw rod 4, thereby allowing the adjusting screw rod 4 to rotate inside the transmission shaft 3.

[0050] In this way, when the adjusting screw rod 4 rotates, the external thread 41 on the adjusting screw rod 4 pushes the transmission shaft 3 to move, and the movement of the transmission shaft 3 drives the second part 102 of the rear wheel support 1 to move, thereby realizing the rotation of the rear wheel support 1. This design enables the rear wheel support 1 to adjust the height by rotating the adjusting screw rod 4.

[0051] The connecting rod 9 is connected to the adjusting screw 4 at the end away from the transmission shaft 3 and extends to the end of the inner adapter frame away from the rear wheel support 1. In this way, the operator can rotate the connecting rod 9 to drive the adjusting screw 4 to rotate at a position away from the rear wheel (near the front end of the inner adapter), thereby adjusting the height of the rear wheel. The connecting rod 9 makes the operation more convenient without the need to move the inner adapter out of the pipe to complete the adjustment.

[0052] The combination of the transmission shaft 3, the adjusting screw 4 and the connecting rod 9 makes the operation of the rear wheel adjustment mechanism more flexible, convenient and accurate. The operator can rotate the connecting rod 9 to drive the adjusting screw 4 to rotate inside the transmission shaft 3, thereby achieving accurate adjustment of the height of the rear wheel.

[0053] As shown in Figure 8 Further, the end of the connecting rod 9 away from the adjusting screw 4 is provided with a connecting head 12, and the end of the connecting head 12 away from the connecting rod 9 is provided with a polygon, such as a hexagon. It can be matched with a wrench, and the whole is a rotating head 122 driven by a wrench.

[0054] The connecting head 12 is part of the connecting rod assembly, connected to the connecting rod 9 and extending to the end of the inner adapter frame away from the rear wheel support. It plays a role in transmitting the adjusting force from the outside to the internal adjustment mechanism, so that the operator can adjust the height of the rear wheel by rotating the connecting head 12. The design of the connecting head 12 makes it matchable with tools such as wrenches, making it easy for the operator to apply force.

[0055] As shown in Figure 8 In an alternative embodiment, the connecting head 12 is detachably arranged with the connecting rod 9.

[0056] Specifically, the connecting rod 9 is provided with a second slot, and the end of the connecting head 12 away from the rotating head 122 is provided with a corresponding interface 121. The second slot provided on the connecting rod 9 and the interface 121 match each other and are clamped in the circumferential direction of the connecting rod 9, so that when the connecting head 12 is rotated, the connecting rod 9 can be rotated, thereby not affecting the transmission of rotation.

[0057] If the connecting head 12 is worn or damaged, the operator can easily disassemble it and replace it with a new connecting head 12, ensuring the continuous normal operation of the equipment. This detachable connection design also facilitates individual maintenance and maintenance of the connecting head 12 and the connecting rod 9, prolonging the service life of the equipment. By setting the connecting head 12 to be detachably connected with the connecting rod 9, the operator can replace different specifications or types of connecting heads 12 (different connecting heads 12 can be provided with different shapes of rotating heads 122 to adapt to different operating tools) according to different work requirements or scenes to adapt to different adjustment requirements.

[0058] The detachable connection design simplifies the installation and disassembly process of the equipment, and the operator can more conveniently install the connecting head 12 on the connecting rod 9 or disassemble it from the connecting rod 9. This design optimizes the operation process, improves work efficiency, and reduces operation difficulty and complexity.

[0059] As shown in Figure 9 Further, the rotating sleeve on the connecting head 12 is provided with a fixing seat 11, and the fixing seat 11 is fixedly connected with the rack of the inner aligner.

[0060] The fixing seat 11 plays a key role in fixing and supporting. Specifically, the fixing seat 11 is fixedly connected with the rack of the inner aligner, and it serves as a stable support point for installing and fixing part of the connecting rod assembly, especially the connecting head 12. In this way, when the connecting head 12 is rotated by a wrench or the like, the fixing seat 11 can ensure the stability and reliability of the connecting rod assembly, thereby effectively transmitting the rotating force to the rear wheel support to achieve adjustment of the rear wheel height.

[0061] Specifically, the fixing seat 11 is composed of a circular ring 111 and an L-shaped plate, and the circular ring and the L-shaped plate are fixedly connected with each other. Among them, the circular ring 111 is rotatably sleeved on the connecting head 12, and the L-shaped plate is provided with a plurality of threaded holes, and the L-shaped plate is fixedly connected with the rack of the inner aligner through the threaded holes and screws. This arrangement allows the connecting head 12 to be connected to the rack of the inner aligner without affecting the rotation of the connecting head 12.

[0062] Further, a first universal joint 8 is connected between the adjusting screw 4 and the connecting rod 9, and a second universal joint 10 is provided between the connecting head 12 and the connecting rod 9.

[0063] The first universal joint 8 is detachably connected with the adjusting screw rod 4, and is fixedly connected with the connecting rod 9. The first universal joint 8 is mainly used for connecting the adjusting screw rod 4 and the connecting rod 9, and realizes flexible rotary connection therebetween. It allows the adjusting screw rod 4 to rotate flexibly through the first universal joint 8 even if different angles or direction changes are encountered, so as to ensure that the connecting rod 9 can stably transmit rotary force, thereby realizing accurate adjustment of the rear wheel support. The presence of the first universal joint 8 increases the flexibility and adaptability of the entire rear wheel adjustment mechanism, so that the adjustment process is smoother and more efficient.

[0064] The second universal joint 10 is detachably connected with the connecting head 12, and is fixedly connected with the connecting rod 9. The second universal joint 10 is mainly used for connecting the connecting rod 9 and the connecting head 12, and also realizes flexible rotary connection therebetween. It allows the connecting head 12 to rotate flexibly through the second universal joint 10 according to different operation requirements or angle changes, so as to maintain stable connection with the connecting rod 9 and effectively transmit rotary force. The introduction of the second universal joint 10 further enhances the flexibility and reliability of the rear wheel adjustment mechanism, so that the operator can more easily and accurately complete the operation when adjusting the height of the rear wheel.

[0065] The first universal joint 8 and the second universal joint 10 allow a certain angle change between the respective connecting components, so that the entire adjustment mechanism is more flexible during operation and can adapt to different working environments and angle requirements. When installing the adjustment mechanism, it can be installed adaptively according to the specific shape of the rack of the inner aligner, the installation condition of other components, and other factors. At the same time, through the connection of the first universal joint 8 and the second universal joint 10, the stress and torque generated during the adjustment process of the adjustment mechanism can be effectively dispersed and adjusted, avoiding component damage or failure caused by stress concentration. The design of the universal joint allows the adjustment mechanism to remain relatively stable during rotation and adjustment, reducing the adjustment errors that may be caused by component shaking or misalignment.

[0066] As shown in Figures 3-7 Further, in order to ensure the stability of the adjusting screw rod 4, a positioning assembly is arranged on the adjusting screw rod 4. The positioning assembly is used to provide stable support and positioning on the adjusting screw rod, so as to ensure that the adjusting screw rod can rotate stably and remain in the correct position.

[0067] Specifically, the positioning assembly includes a sleeve ring 6 and a support plate 7. The sleeve ring 6 is rotatably sleeved on the adjusting screw rod 4, and the support plate 7 is connected with the outer side of the sleeve ring 6. The support plate 7 is fixedly connected with the rack of the inner aligner.

[0068] The sleeve ring 6 is provided with a stepped inner hole 61, and the adjusting lead screw 4 is provided with a protrusion matched with the stepped inner hole 61. The sleeve ring 6 is provided with a pressing plate 5 at the outlet of the stepped inner hole 61, which can abut against the protrusion.

[0069] The sleeve ring 6 is rotatably sleeved on the adjusting lead screw 4, and the stepped inner hole 61 of the sleeve ring 6 is matched with the protrusion of the adjusting lead screw 4, thereby providing precise positioning and support for the adjusting lead screw 4. The sleeve ring 6 is stably fixed on the rack of the inner aligner through the connection with the support plate 7, thereby preventing the adjusting lead screw 4 from deviating or shaking during rotation. The support plate 7 is connected with the outer side of the sleeve ring 6. The presence of the support plate 7 makes the adjusting lead screw 4 more stable during rotation, and it is not easy to be disturbed by external factors, thereby improving the adjustment accuracy and stability of the rear wheel adjusting mechanism. Through the fixed connection of the support plate 7, the connection strength between the positioning assembly and the rack of the inner aligner is also enhanced, thereby improving the reliability and durability of the entire rear wheel adjusting mechanism. The pressing plate 5 can be detached from the sleeve ring 6, and the pressing plate 5 is clamped to the sleeve ring 6 when the adjusting lead screw 4 is installed in the sleeve ring 6 as required. The pressing plate 5 acts on the outlet of the stepped inner hole 61 of the sleeve ring 6 and abuts against the protrusion of the adjusting lead screw 4, thereby ensuring that the adjusting lead screw 4 will not come out of the sleeve ring 6 during rotation. The presence of the pressing plate 5 enhances the connection stability between the sleeve ring 6 and the adjusting lead screw 4, thereby improving the reliability and safety of the entire positioning assembly.

[0070] Specifically, the support plate 7 and the sleeve ring 6 are rotatably connected through a connecting shaft. In this way, the rotating connection between the support plate 7 and the sleeve ring 6 is realized through the connecting shaft, allowing the sleeve ring 6 and the adjusting lead screw 4 to rotate relative to the support plate 7. This arrangement enables the adjusting lead screw 4 to perform necessary adjustment operations, such as raising or lowering the rear wheel support, while maintaining relative fixation with the rack of the inner aligner. This improves the flexibility of the structure, allowing the rear wheel adjusting mechanism to adapt to different pipeline construction environments and operational requirements. This enhances the stability of the system, and through the fixing action of the support plate 7, it ensures that the sleeve ring 6 and the adjusting lead screw 4 will not shake or deviate from the predetermined trajectory during rotation. This simplifies the operation process, and the construction personnel can easily adjust the height of the rear wheel by rotating the adjusting lead screw 4 without the need to disassemble or move the entire inner aligner.

[0071] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0072] It also needs to be explained that in this paper, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations, nor can it be understood as indicating or implying relative importance. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or terminal device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or terminal device including the element.

[0073] The above provides a detailed description of the technical solutions of the present application, and the principles and implementation modes of the present application are described by applying specific examples. The above example is only used to help understand the present application, and the content of the description should not be understood as limiting the present application. At the same time, for those skilled in the art, according to the present application, there will be different forms of changes in specific implementation modes and application ranges, which do not need and cannot be exhausted here, and the obvious changes or changes derived therefrom are still within the protection scope of the present application.

Claims

1. A rear wheel adjustment mechanism for a pipe alignment device, characterized in that, The adjustment mechanism includes a rear wheel bracket, a pin shaft, and a connecting rod assembly; The rear wheel bracket includes a first part and a second part, wherein the first part is connected to the rear wheel of the inner aligner; The first part and the second part are interconnected, and the first part and the second part are in an overall L shape. The pin passes through the connection between the first part and the second part, and the pin is connected to the frame of the inner aligner. The linkage assembly is connected to the second part and extends to the end of the frame of the inner aligner away from the rear wheel bracket. The linkage assembly is used to drive the second part to move so as to cause the first part to rotate through the pin.

2. The rear wheel adjustment mechanism of the pipe alignment device according to claim 1, characterized in that, The linkage assembly includes a drive shaft, an adjusting screw, and a connecting rod; The drive shaft is rotatably inserted through the second part. A through hole is provided on the drive shaft. The adjusting screw is inserted into the through hole and is threadedly connected to the through hole. The connecting rod is connected to the end of the adjusting screw away from the drive shaft, and the connecting rod extends to the end of the frame of the inner aligner away from the rear wheel bracket; The connecting rod is used to drive the adjusting screw to rotate.

3. The rear wheel adjustment mechanism of the pipe alignment device according to claim 2, characterized in that, The connecting rod has a connector at the end away from the adjusting screw, and the end of the connector away from the connecting rod is polygonal.

4. The rear wheel adjustment mechanism of the pipe alignment device according to claim 3, characterized in that, The connector is detachably connected to the connecting rod.

5. The rear wheel adjustment mechanism of the pipe alignment device according to claim 3, characterized in that, A fixed seat is rotatably fitted onto the connector head, and the fixed seat is fixedly connected to the frame of the inner aligner.

6. The rear wheel adjustment mechanism of the pipe alignment device according to claim 3, characterized in that, A first universal coupling is connected between the adjusting screw and the connecting rod, and a second universal coupling is provided between the connector and the connecting rod; The first universal coupling is detachably connected to the adjusting screw, and the first universal coupling is fixedly connected to the connecting rod; The second universal coupling is detachably connected to the connector, and the second universal coupling is fixedly connected to the connecting rod.

7. The rear wheel adjustment mechanism of the pipe alignment device according to claim 2, characterized in that, The adjusting screw is equipped with a positioning component; The positioning assembly includes a collar and a support plate. The collar is rotatably sleeved on the adjusting screw. The support plate is connected to the outer side of the collar and is fixedly connected to the frame of the inner alignment device.

8. The rear wheel adjustment mechanism of the pipe alignment device according to claim 7, characterized in that, The collar is provided with a stepped inner hole, and the outer side of the adjusting screw is provided with a protrusion that matches the stepped inner hole. The collar is provided with a pressure plate at the outlet of the stepped inner hole that can abut against the protrusion.

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