Heat-shrinkable tape winding device, joint coating equipment and heat-shrinkable tape winding method

Abstract

The invention belongs to the technical field of pipeline construction, and discloses a heat-shrinkable tape winding device, joint coating equipment and a heat-shrinkable tape winding method. The thermal shrinkage belt winding device comprises a support, a feeding roller, a pressing roller and a first heating unit. The support is movably installed on a pipeline in the circumferential direction of the pipeline. The feeding roller is rotatably arranged on the support in the axial direction of the feeding roller, and the thermal shrinkage belt can be wound around the feeding roller. The pressing roller is movably arranged on the support and provided with an installation position and a pressing position, and when the pressing position is located, the pressing roller can press the heat shrinkage belt or the first guide belt to the pipeline and can roll relative to the heat shrinkage belt or the first guide belt; at the mounting position, the pressing roller can be separated from the thermal shrinkage belt or the first guide belt; the first heating unit is arranged between the pressing roller and the feeding roller and is configured to heat the thermal shrinkage belt. The heat-shrinkable tape winding device can automatically wind a heat-shrinkable tape on a pipeline, so that the labor cost is reduced, the winding efficiency and automation degree of the heat-shrinkable tape are improved, and the winding quality of the heat-shrinkable tape is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline construction, and particularly to a heat shrinkable tape winding device, a joint repair device and a heat shrinkable tape winding method. Background Art

[0002] A heat shrinkable tape is a functional material with heat shrinkage characteristics. After being heated, it can generate radial shrinkage, so as to closely adhere to the surface of the object to be wrapped, forming a continuous and uniform protective layer. Due to its excellent sealing, anti-corrosion and insulation properties, this material is widely used in the protection of key parts such as cable joints and pipeline interfaces.

[0003] In the prior art, the winding of heat shrinkable tape on pipelines mainly relies on manual operation: the staff needs to first unroll the rolled heat shrinkable tape and locally heat both ends of the heat shrinkable tape to make it shrink; subsequently, manually wind the shrunk heat shrinkable tape onto the pipeline surface. The heat shrinkable tape can wrap the pipeline along the circumferential direction of the pipeline and adhere to the pipeline through the adhesive layer; finally, heat the middle section of the heat shrinkable tape so that the heat shrinkable tape can shrink to closely adhere to and bond with the pipeline. However, the existing method of winding heat shrinkable tape overly relies on manual operation. On the one hand, it makes the winding efficiency of the heat shrinkable tape low and the labor cost high. On the other hand, it makes the winding quality of the heat shrinkable tape overly dependent on the technical proficiency of the operator and the construction conditions, resulting in difficulty in ensuring the consistency and reliability of the protective effect of the heat shrinkable tape. In addition, during the process of heating the heat shrinkable tape, the high-temperature working environment also poses a certain threat to the life and health of the staff.

[0004] Therefore, there is an urgent need for a heat shrinkable tape winding device, a joint repair device and a heat shrinkable tape winding method to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a heat shrinkable tape winding device, a joint repair device and a heat shrinkable tape winding method, in which the heat shrinkable tape can be automatically wound onto the pipeline without manual operation, reducing the labor cost, improving the winding efficiency and automation degree of the heat shrinkable tape, and also ensuring the winding quality of the heat shrinkable tape.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] In the first aspect, a heat shrinkable tape winding device is provided. A first guiding tape for positioning the starting position of heat shrinkable tape winding is arranged at the end of the heat shrinkable tape. The heat shrinkable tape winding device includes:

[0008] A bracket, which is movably installed on the pipeline along the circumferential direction of the pipeline;

[0009] A feeding roller, which is rotatably arranged on the bracket along its axial direction, and the heat shrinkable tape can be wound around the feeding roller;

[0010] A pressing roller is movably arranged on the bracket, and the pressing roller has an installation position and a pressing position. When in the pressing position, the pressing roller can press the heat shrinkable belt or the first guide belt against the pipeline and can roll relative to the heat shrinkable belt or the first guide belt; when in the installation position, the pressing roller can be separated from the heat shrinkable belt or the first guide belt;

[0011] The first heating unit is disposed between the pressure roller and the feeding roller, and is configured to heat the heat shrinkable tape.

[0012] Optionally, the heat shrink tape winding device also includes an operating member rotatably connected to the bracket, and the operating member is provided with a protrusion that contacts the clamping roller. When the operating member is driven to rotate, the protrusion pushes the clamping roller to move, and the clamping roller switches between the installation position and the clamping position.

[0013] Optionally, an arc-shaped limit block is provided on the bracket, and an arc-shaped groove is provided on the operating member. The arc-shaped limit block is located in the arc-shaped groove. When in the installation position, the groove wall of the arc-shaped groove contacts the first side wall of the arc-shaped limit block. When in the clamping position, the groove wall of the arc-shaped groove contacts or has a clearance fit with the second side wall of the arc-shaped limit block. The first side wall and the second side wall are respectively two side walls opposite to each other along the extension direction of the arc-shaped limit block.

[0014] Optionally, the heat shrink tape winding device also includes a first elastic member and a connecting member, a second rotating shaft is arranged on the bracket, one end of the connecting member is connected to the clamping roller, and the other end is sleeved on the second rotating shaft and rotatably connected to the second rotating shaft, one end of the first elastic member is wound around the second rotating shaft, and the other end is connected to the connecting member, and the clamping roller can automatically switch from the installation position to the clamping position under the elastic force of the first elastic member.

[0015] Optionally, a movable flexible tension belt is provided on the bracket, a friction wheel is provided on the feeding roller, two ends of the flexible tension belt are respectively connected to the bracket, and a portion of the flexible tension belt contacts the friction wheel and rotates in cooperation with the friction wheel.

[0016] Optionally, a second connecting shaft connected to the bracket is provided at one end of the flexible tension band, and an adjusting piece and a second elastic piece are provided on the second connecting shaft. The adjusting piece is located at one end of the second connecting shaft away from the flexible tension band and its position on the second connecting shaft is adjustable. One end of the second elastic piece is connected to the adjusting piece, and the other end is connected to the flexible tension band.

[0017] Optionally, the first heating unit includes a first mounting frame and a plurality of infrared lamp tubes detachably disposed on the first mounting frame, the first mounting frame is detachably connected to the bracket, and the infrared lamp tubes are used to heat the heat shrinkable tape.

[0018] Optionally, the heat shrink tape winding device further includes a second heating unit detachably disposed on the bracket, the second heating unit being located on a side of the feed roller away from the first heating unit and configured to heat the heat shrink tape for a second time.

[0019] In a second aspect, a joint repairing device is provided, which includes a base and the heat shrinkable tape winding device of the first aspect. The base can be movably installed on the pipeline along the extending direction of the pipeline. The bracket of the heat shrinkable tape winding device is movably arranged on the base along the circumferential direction of the pipeline and is detachably connected to the base.

[0020] In a third aspect, a method for winding a heat shrinkable tape is provided. The heat shrinkable tape is wound onto the pipeline by using the heat shrinkable tape winding device of the first aspect, and the method includes the following steps:

[0021] S1. Switch the pressing roller to the installation position, and pass the first guiding tape through between the pressing roller and the pipeline via the first heating unit until the first guiding tape moves to the position of the pressing roller and the end of the heat shrinkable tape connected to the first guiding tape moves to the position of the first heating unit;

[0022] S2. Switch the pressing roller to the pressing position and turn on the first heating unit;

[0023] S3. Drive the bracket to move along the direction from the pressing roller via the first heating unit to the feeding roller. The heat shrinkable tape located on the feeding roller is gradually unwound onto the pipeline, and the heat shrinkable tape unwound onto the pipeline is sequentially heated by the first heating unit and pressed onto the pipeline by the pressing roller.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] The present invention provides a heat shrinkable tape winding device, a joint coating equipment and a heat shrinkable tape winding method. The feeding roller can unwind the heat shrinkable tape wound thereon onto the pipeline to achieve automatic feeding during the winding process; the first heating unit is used to heat the heat shrinkable tape so that the heat shrinkable tape shrinks and adheres to the pipeline, realizing automatic heating during the winding process; when in the pressing position, the heat shrinkable tape can be pressed by the pressing roller against the pipeline, enabling the air bubbles between the heat shrinkable tape and the pipeline to be discharged, ensuring that the heat shrinkable tape can closely adhere to and bond with the pipeline, and improving the quality of the heat shrinkable tape winding. When in the installation position, the pressing roller is separated from the heat shrinkable tape and the first guiding tape, allowing the heat shrinkable tape and the first guiding tape to move between the pressing roller and the pipeline, so as to move one end of the heat shrinkable tape connected to the first guiding tape to the first heating unit and move the first guiding tape to the pressing roller before winding. One end of the heat shrinkable tape connected to the first guiding tape is located at the first heating unit, enabling all the heat shrinkable tape unwound from the feeding roller onto the pipeline during the winding process to be heated by the first heating unit, ensuring that all the heat shrinkable tape wound onto the pipeline can be heated and shrunk and evenly heated, and improving the stability and consistency of the winding quality of the heat shrinkable tape at various circumferential parts of the pipeline. The first guiding tape is pressed against the pipeline by the pressing roller, so that the position of one end of the heat shrinkable tape connected to the first guiding tape on the pipeline is fixed during the movement of the bracket, allowing the other end of the heat shrinkable tape to gradually unwind from the feeding roller onto the pipeline and unwind along the circumference of the pipeline. During the winding process, the bracket is driven to rotate in the direction from the pressing roller via the first heating unit to the feeding roller, and the feeding roller, the pressing roller and the first heating unit provided on the bracket can move together, enabling the heat shrinkable tape to first unwind from the feeding roller onto the pipeline, then be heated by the first heating unit, and finally be pressed to closely adhere to the pipeline, and ensuring that both ends of the heat shrinkable tape do not shift, thus completing the automatic winding of the heat shrinkable tape on the pipeline, reducing the manual participation and labor cost, and improving the efficiency and automation degree of the heat shrinkable tape winding. During the movement of the pressing roller along with the bracket, the pressing roller rolls relative to the heat shrinkable tape or the first guiding tape, which can reduce the friction between the pressing roller and the heat shrinkable tape and the first guiding tape to avoid damage to the heat shrinkable tape due to friction. In addition, the bracket is arranged on the base, and when the base moves along the extension direction of the pipeline, it can drive the bracket to move together, enabling the heat shrinkable tape winding device provided by the present invention to move to any part of the pipeline for construction, further improving the automation degree of the heat shrinkable tape winding; the bracket is detachably connected to the base, and when there is no need to wind the heat shrinkable tape on the pipeline, the bracket can be detached from the base to reduce the burden on the base during the joint coating operation of other processes and improve the moving speed of the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the heat shrinkable tape winding device provided by the present invention;

[0027] Figure 2ASide view of the pressing roller of the heat-shrinkable tape winding device provided by the present invention when it is in the installation position;

[0028] Figure 2B Side view of the pressing roller of the heat-shrinkable tape winding device provided by the present invention when it is in the pressing position;

[0029] Figure 3A First position diagram (hiding the bracket) of the heat-shrinkable tape winding device provided by the present invention when winding the heat-shrinkable tape on the pipeline;

[0030] Figure 3B Second position diagram (hiding the bracket) of the heat-shrinkable tape winding device provided by the present invention when winding the heat-shrinkable tape on the pipeline;

[0031] Figure 3C Third position diagram (hiding the bracket) of the heat-shrinkable tape winding device provided by the present invention when winding the heat-shrinkable tape on the pipeline;

[0032] Figure 4 Structural schematic diagram of the heat-shrinkable tape;

[0033] Figure 5 Structural schematic diagram of the pressing roller of the heat-shrinkable tape winding device provided by the present invention;

[0034] Figure 6 Exploded view of the pressing roller of the heat-shrinkable tape winding device provided by the present invention;

[0035] Figure 7 Structural schematic diagram of the first mounting seat of the heat-shrinkable tape winding device provided by the present invention;

[0036] Figure 8 Structural schematic diagram of the feeding roller of the heat-shrinkable tape winding device provided by the present invention;

[0037] Figure 9 Structural schematic diagram of the flexible tension belt of the heat-shrinkable tape winding device provided by the present invention;

[0038] Figure 10 Structural schematic diagram of the first heating unit of the heat-shrinkable tape winding device provided by the present invention;

[0039] Figure 11 Exploded view of the first heating unit of the heat-shrinkable tape winding device provided by the present invention;

[0040] Figure 12 Structural schematic diagram of the infrared lamp tube of the heat-shrinkable tape winding device provided by the present invention;

[0041] Figure 13 is Figure 12 Enlarged view at A in

[0042] Figure 14Schematic diagram of the joint coating device provided by the present invention;

[0043] Figure 15 Flow chart of the heat shrinkable tape winding method provided by the present invention.

[0044] In the figure:

[0045] 100, pipeline; 200, heat shrinkable tape; 201, first guiding tape; 202, second guiding tape; 203, overlapping piece;

[0046] 1, base; 11, traveling wheel;

[0047] 2, heat shrinkable tape winding device;

[0048] 21, bracket; 211, circular ring bracket; 212, connecting rod;

[0049] 22, feeding roller; 221, feeding roller cylinder; 222, feeding end cover; 2221, friction wheel; 223, flexible tension belt; 2231, second connecting shaft; 22311, adjusting part; 22312, second elastic part; 22313, gasket; 2232, third connecting shaft; 224, second mounting seat; 2241, mounting groove; 225, third mounting seat;

[0050] 23, pressing roller; 231, operating part; 2311, protruding part; 2312, arc-shaped groove; 2313, first connecting hole; 2314, connecting rod; 232, first mounting seat; 2321, first rotating shaft; 2322, arc-shaped limiting block; 23221, first side wall; 23222, second side wall; 2323, second rotating shaft; 23231, anti-detaching cover; 233, first elastic part; 234, connecting part; 2341, second connecting hole; 2342, third connecting hole; 2351, pressing roller cylinder; 2352, pressing end cover; 23521, first connecting shaft; 23522, first bearing; 23523, first snap ring;

[0051] 24, first heating unit; 241, first mounting frame; 2411, frame body; 24111, limiting plate; 24112, third jack; 2412, cover body; 24121, heating port; 24122, second tongue; 242, infrared lamp tube; 2421, lamp tube bracket; 2422, pipeline;

[0052] 25, second heating unit. Detailed implementation manners

[0053] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0054] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0055] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0056] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0057] Embodiment 1

[0058] As Figures 1 to 13 shown, this embodiment provides a heat shrinkable tape winding device 2. The heat shrinkable tape 200 can be automatically wound onto the pipeline 100 without manual operation, reducing the labor cost, improving the winding efficiency and automation degree of the heat shrinkable tape 200, and also ensuring the winding quality of the heat shrinkable tape 200.

[0059] Refer to Figure 1 、 Figure 3A and Figure 4, a first guiding strip 201 for positioning the starting position of the winding of the heat-shrinkable tape 200 is provided at the end of the heat-shrinkable tape 200. The heat-shrinkable tape winding device 2 includes a bracket 21, a feeding roller 22, a pressing roller 23 and a first heating unit 24. The bracket 21 is movably mounted on the pipeline 100 along the circumferential direction of the pipeline 100; the feeding roller 22 is rotatably arranged on the bracket 21 along its axial direction, and the heat-shrinkable tape 200 can be wound around the feeding roller 22; the pressing roller 23 is movably arranged on the bracket 21, and the pressing roller 23 has an installation position and a pressing position. In the pressing position, the pressing roller 23 can press the heat-shrinkable tape 200 or the first guiding strip 201 against the pipeline 100 and can roll relative to the heat-shrinkable tape 200 or the first guiding strip 201; in the installation position, the pressing roller 23 can be separated from the heat-shrinkable tape 200 or the first guiding strip 201; the first heating unit 24 is arranged between the pressing roller 23 and the feeding roller 22 and is configured to heat the heat-shrinkable tape 200.

[0060] The heat-shrinkable tape winding device 2 provided in this embodiment can unwind the heat-shrinkable tape 200 that can be wound thereon by the rotation of the feeding roller 22 onto the pipeline 100 to achieve automatic feeding during the winding process; the first heating unit 24 is used to heat the heat-shrinkable tape 200 so that the heat-shrinkable tape 200 shrinks and adheres to the pipeline 100, realizing automatic heating during the winding process; when in the pressing position, the heat-shrinkable tape 200 can be pressed by the pressing roller 23 onto the pipeline 100, so that the air bubbles between the heat-shrinkable tape 200 and the pipeline 100 can be discharged, ensuring that the heat-shrinkable tape 200 can be closely adhered to and bonded with the pipeline 100, improving the winding quality of the heat-shrinkable tape 200. When in the installation position, the pressing roller 23 is separated from the heat-shrinkable tape 200 and the first guiding tape 201, so that the heat-shrinkable tape 200 and the first guiding tape 201 can move between the pressing roller 23 and the pipeline 100, facilitating the movement of one end of the connected heat-shrinkable tape 200 and the first guiding tape 201 to the first heating unit 24 and the movement of the first guiding tape 201 to the pressing roller 23 before winding. One end of the connection between the heat-shrinkable tape 200 and the first guiding tape 201 is located at the first heating unit 24, so that the heat-shrinkable tape 200 unwound from the feeding roller 22 onto the pipeline 100 during the winding process can be heated by the first heating unit 24, ensuring that all the heat-shrinkable tapes 200 wound onto the pipeline 100 can be heated and shrunk and evenly heated, improving the stability and consistency of the winding quality of the heat-shrinkable tape 200 at various circumferential parts of the pipeline 100. The first guiding tape 201 is pressed by the pressing roller 23 onto the pipeline 100, so that the position of one end of the connection between the heat-shrinkable tape 200 and the first guiding tape 201 on the pipeline 100 is fixed during the movement of the bracket 21, enabling the other end of the heat-shrinkable tape 200 to gradually unwind from the feeding roller 22 onto the pipeline 100 and unwind along the circumference of the pipeline 100. During the winding process, the bracket 21 is driven to rotate in the direction from the pressing roller 23 via the first heating unit 24 to the feeding roller 22, and the feeding roller 22, the pressing roller 23 and the first heating unit 24 provided on the bracket 21 can move together, so that the heat-shrinkable tape 200 can first unwind from the feeding roller 22 onto the pipeline 100, then be heated by the first heating unit 24, and finally be pressed to be closely adhered to the pipeline 100, and it is ensured that the two ends of the heat-shrinkable tape 200 will not shift, thus completing the automatic winding of the heat-shrinkable tape 200 on the pipeline 100, reducing the manual participation and labor cost, and improving the winding efficiency and automation degree of the heat-shrinkable tape 200. During the movement of the pressing roller 23 with the bracket 21, the pressing roller 23 rolls relative to the heat-shrinkable tape 200 or the first guiding tape 201, which can reduce the friction force between the pressing roller 23 and the heat-shrinkable tape 200 and the first guiding tape 201 to avoid damage to the heat-shrinkable tape 200 due to friction.

[0061] Exemplarily, referring to Figure 3B and Figure 4, the first guiding belt 201 partially overlaps with the heat-shrinkable belt 200, and the first guiding belt 201 is located on the side of the heat-shrinkable belt 200 away from the pipeline 100. After the first heating unit 24 heats the heat-shrinkable belt 200, the first guiding belt 201 at the overlapping part can prevent the heat-shrinkable belt 200 from adhering to the first heating unit 24 due to heat, ensuring the smooth progress of subsequent winding.

[0062] Further, referring to Figure 3C and Figure 4 , a second guiding belt 202 is provided at one end of the heat-shrinkable belt 200 away from the first guiding belt 201, and the second guiding belt 202 is used to locate the termination position of the winding of the heat-shrinkable belt 200. The second guiding belt 202 partially overlaps with the heat-shrinkable belt 200. After the heat-shrinkable belt 200 winds around the pipeline 100 for one circumferential circle, the second guiding belt 202 is located on the side of the heat-shrinkable belt 200 away from the pipeline 100, so as to prevent the heat-shrinkable belt 200 from adhering to the first heating unit 24 due to heat and affecting the normal progress of subsequent construction.

[0063] Referring to Figure 3C and Figure 4 , the second guiding belt 202 and the heat-shrinkable belt 200 are connected by a lapping piece 203. After the heat-shrinkable belt 200 winds around the pipeline 100 for one circle, the lapping piece 203 is located at the interface of both ends of the heat-shrinkable belt 200, which can ensure the firm connection of both ends of the heat-shrinkable belt 200 and prevent it from loosening or separating during use.

[0064] In this embodiment, referring to Figure 1 and Figure 3A , the bracket 21 includes two circular ring frames 211 and a connecting rod 212 for connecting the two circular ring frames 211. Both ends of the pressing roller 23 and both ends of the feeding roller 22 are respectively connected to the two circular ring frames 211. The pipeline 100 passes through the inner hole of the circular ring frame 211. When the bracket 21 moves along the circumferential direction of the pipeline 100, the circular ring frame 211 rotates around the extending direction of the pipeline 100.

[0065] In other embodiments, the bracket 21 is an arc-shaped frame, and the arc-shaped frame moves along the circumferential direction of the pipeline 100.

[0066] Optionally, referring to Figure 1 , Figure 5 and Figure 6 , the heat-shrinkable belt winding device 2 further includes an operating member 231 rotatably connected to the bracket 21. A convex portion 2311 in contact with the pressing roller 23 is provided on the operating member 231. By driving the operating member 231 to rotate, the convex portion 2311 pushes the pressing roller 23 to move, and the pressing roller 23 switches between the installation position and the pressing position. Referring to Figure 2A in the orientation, when the operator holds the operating member 231 and rotates it clockwise, the pressing roller 23 is pushed to move away from the heat-shrinkable belt 200, and the pressing roller 23 switches from the pressing position to the installation position; referring toFigure 2B In the orientation shown in Figure 2B , when the operating member 231 is driven to rotate counterclockwise, the pressing roller 23 is pushed towards the direction close to the heat-shrinkable tape 200, and the pressing roller 23 is switched from the installation position to the pressing position, which is convenient and fast to operate and is convenient for use at the construction site.

[0067] Exemplarily, the operating member 231 adopts a cam handle, and the convex portion 2311 is the cam of the cam handle.

[0068] In this embodiment, referring to Figure 1 、 Figure 5 and Figure 7 , an arc-shaped limiting block 2322 is provided on the bracket 21, and an arc-shaped groove 2312 is provided on the operating member 231. The arc-shaped limiting block 2322 is located in the arc-shaped groove 2312. In the installation position, the groove wall of the arc-shaped groove 2312 contacts the first side wall 23221 of the arc-shaped limiting block 2322, and the operating member 231 is limited to the current position, so that the pressing roller 23 is stably limited to the installation position; in the pressing position, the groove wall of the arc-shaped groove 2312 contacts or has a clearance fit with the second side wall 23222 of the arc-shaped limiting block 2322. Wherein, the first side wall 23221 and the second side wall 23222 are respectively two opposite side walls of the arc-shaped limiting block 2322 along its extending direction. When the groove wall of the arc-shaped groove 2312 contacts the second side wall 23222 of the arc-shaped limiting block 2322, the operating member 231 cannot continue to rotate, and the pressing roller 23 is stably limited to the pressing position, ensuring that the pressing roller 23 can always press the heat-shrinkable tape against the pipeline during the subsequent winding process; when the groove wall of the arc-shaped groove 2312 has a clearance fit with the second side wall 23222 of the arc-shaped limiting block 2322, the clearance can adapt to the thickness of the heat-shrinkable tape 200, so that the pressing roller 23 can adapt to the change in the thickness of the heat-shrinkable tape during the winding process, ensuring that heat-shrinkable tapes of different thicknesses can be pressed against the pipeline by the pressing roller 23. The arc-shaped limiting block 2322 and the arc-shaped groove 2312 are set to be arc-shaped, which can cooperate with the rotation of the operating member 231 on the bracket 21 to ensure that the operating member 231 can be stably limited while rotating relative to the bracket 21.

[0069] Specifically, referring to Figure 1 、 Figure 5 and Figure 6 , a first mounting seat 232 detachably connected to the bracket 21 is provided on the bracket 21. A first rotating shaft 2321 is provided on the first mounting seat 232. A first connecting hole 2313 is provided on the operating member 231. The first rotating shaft 2321 passes through the first connecting hole 2313 and is rotationally matched with the first connecting hole 2313 to realize the rotational connection between the operating member 231 and the bracket 21. The arc-shaped limiting block 2322 is provided on the side wall of the first rotating shaft 2321, and the arc-shaped groove 2312 is located at the first connecting hole 2313.

[0070] Exemplarily, the first mounting seat 232 is detachably connected to the bracket 21 by bolts.

[0071] Further, referring to Figure 5 , operating members 231 are provided on both sides of the pressing roller 23 along its axial direction to ensure the consistency of the position switching at both ends of the pressing roller 23; in addition, the two operating members 231 are connected by a connecting rod 2314, and the staff can operate the two operating members 231 to rotate simultaneously by operating the connecting rod 2314, which is convenient and fast to operate and is convenient for use at the construction site.

[0072] Optionally, referring to Figure 1 , Figure 5 and Figure 6 , the heat shrinkable tape winding device 2 further includes a first elastic member 233 and a connecting member 234. A second rotating shaft 2323 is provided on the bracket 21. One end of the connecting member 234 is connected to the pressing roller 23, and the other end is sleeved on the second rotating shaft 2323 and is rotatably connected to the second rotating shaft 2323. One end of the first elastic member 233 is wound around the second rotating shaft 2323, and the other end is connected to the connecting member 234. The pressing roller 23 can automatically switch from the installation position to the pressing position under the elastic force of the first elastic member 233. When the position of the pressing roller 23 changes, the pressing roller 23 drives the connecting member 234 and the connected end thereof to move together, and the connecting member 234 rotates relative to the second rotating shaft 2323, so that the pressing roller 23 is connected to the bracket 21 through the connecting member 234 and the second rotating shaft 2323 and can also move relative to the bracket 21. The setting of the first elastic member 233 enables the pressing roller 23 to switch from the pressing position to the installation position only under an external force, which helps to ensure that the pressing roller 23 can always press the heat shrinkable tape and the first guiding tape against the pipeline at the pressing position, ensuring the quality of the winding of the heat shrinkable tape.

[0073] Referring to Figure 3B and Figure 5 , the convex portion 2311 contacts the pressing roller 23 through the connecting member 234, and the first elastic member 233 and the convex portion 2311 cooperate with each other to stably limit the pressing roller 23 at the pressing position and the installation position, which helps to ensure the winding effect of the heat shrinkable tape 200.

[0074] Specifically, referring to Figure 1 , Figure 5 and Figure 6, the second rotating shaft 2323 is arranged on the first mounting seat 232. The other end of the connecting member 234 is provided with a second connecting hole 2341. The second rotating shaft 2323 passes through the second connecting hole 2341 and is rotationally matched with the second connecting hole 2341, that is, the pressing roller 23 is detachably connected to the bracket 21 through the first mounting seat 232 and the connecting member 234. An anti-detachment cover 23231 detachably connected to the end of the second rotating shaft 2323 is provided. The anti-detachment cover 23231 contacts the side of the connecting member 234 away from the first mounting seat 232, and is used to prevent the second rotating shaft 2323 from detaching from the second connecting hole 2341.

[0075] Exemplarily, refer to Figure 6 , the first elastic member 233 is a torsion spring. One end of the torsion spring is wound around the second rotating shaft 2323, and the other end is located in the second connecting hole 2341, and can provide an elastic force for the connecting member 234 along its rotating direction.

[0076] Exemplarily, refer to Figure 6 , the second rotating shaft 2323 and the anti-detachment cover 23231 are detachably connected by bolts or screws.

[0077] In this embodiment, refer to Figure 6 , the pressing roller 23 includes a pressing roller cylinder 2351 and a pressing end cover 2352 arranged at the end of the pressing roller cylinder 2351. The pressing end cover 2352 is rotationally connected to the pressing roller cylinder 2351. A first connecting shaft 23521 is provided on the pressing end cover 2352. The end of the connecting member 234 away from the second rotating shaft 2323 is provided with a third connecting hole 2342. The first connecting shaft 23521 passes through the third connecting hole 2342 and is connected to the hole wall of the third connecting hole 2342 through a first bearing 23522 to reduce the friction between the first connecting shaft 23521 and the hole wall of the third connecting hole 2342. A first snap ring 23523 is arranged between the first connecting shaft 23521 and the first bearing 23522 to fix the position of the first bearing 23522 on the first connecting shaft 23521 and prevent it from moving on the first connecting shaft 23521.

[0078] Further, refer to Figure 3B and Figure 5 , connecting members 234 are arranged at both ends of the pressing roller 23 along its extending direction, ensuring the consistency of the position switching at both ends of the pressing roller 23 and ensuring the pressing effect of the pressing roller 23 on the heat shrinkable tape 200.

[0079] Optionally, refer to Figure 1 、 Figure 3C and Figure 8, a movable flexible tension belt 223 is provided on the bracket 21, and a friction wheel 2221 is provided on the feeding roller 22. Both ends of the flexible tension belt 223 are connected to the bracket 21, and a part of the flexible tension belt 223 is in contact with the friction wheel 2221 and rotates in cooperation with the friction wheel 2221. When the feeding roller 22 rotates, the feeding roller 22 drives the friction wheel 2221 to rotate, and a frictional force that hinders its rotation is generated between the friction wheel 2221 and the flexible tension belt 223. This frictional force can tension the heat-shrinkable belt 200 to a certain extent when the heat-shrinkable belt 200 unwinds from the feeding roller 22, so that the heat-shrinkable belt 200 can be smoothly wound around the pipeline 100 without phenomena such as wrinkles or curling, improving the fitting degree between the heat-shrinkable belt 200 and the pipeline 100.

[0080] Exemplarily, the flexible tension belt 223 is made of a brake belt, and the friction wheel 2221 is made of a friction hub.

[0081] In this embodiment, referring to Figure 1 , Figure 8 and Figure 9 , one end of the flexible tension belt 223 is provided with a second connecting shaft 2231 connected to the bracket 21. An adjusting member 22311 and a second elastic member 22312 are provided on the second connecting shaft 2231. The adjusting member 22311 is located at the end of the second connecting shaft 2231 away from the flexible tension belt 223 and its position on the second connecting shaft 2231 is adjustable. One end of the second elastic member 22312 is connected to the adjusting member 22311, and the other end is connected to the flexible tension belt 223. Driving the adjusting member 22311 to move, the second elastic member 22312 deforms and generates an elastic force. This elastic force can act on the flexible tension belt 223 and cause the flexible tension belt 223 to deform, so that the contact tightness between the flexible tension belt 223 and the friction wheel 2221 is changed, thereby changing the frictional force between the flexible tension belt 223 and the friction wheel 2221, realizing the adjustment of the tension degree of the heat-shrinkable belt, and the operation is convenient and simple.

[0082] Exemplarily, referring to Figure 9 , the adjusting member 22311 is a nut, and the nut is sleeved on the second connecting shaft 2231 and is threadedly connected to the second connecting shaft 2231, so that the adjusting member 22311 can move along the axial direction of the second connecting shaft 2231. The second elastic member 22312 is a spring, and the spring is sleeved on the second connecting shaft 2231. Further, a gasket 22313 is provided between the adjusting member 22311 and the second elastic member 22312 to ensure that the adjusting member 22311 can be stably connected to the second elastic member 22312.

[0083] Specifically, referring to Figure 1 and Figure 9, a second mounting seat 224 detachably connected to the bracket 21 is provided on the bracket 21. An installation groove 2241 is provided on the second mounting seat 224, and the second connecting shaft 2231 is clamped in the installation groove 2241. A third connecting shaft 2232 detachably connected to the bracket 21 is also provided on the bracket 21. One end of the flexible tension belt 223 away from the second connecting shaft 2231 is wound around the third connecting shaft 2232 to realize the connection of both ends of the flexible tension belt 223 to the bracket 21.

[0084] Exemplarily, both the second mounting seat 224 and the third connecting shaft 2232 are detachably connected to the bracket 21 by bolts.

[0085] In this embodiment, refer to Figure 1 and Figure 8 , the feeding roller 22 includes a feeding roller cylinder 221 and a feeding end cover 222 provided at the end of the feeding roller cylinder 221. The friction wheel 2221 is provided on the feeding end cover 222. A third mounting seat 225 detachably connected to the bracket 21 is provided on the bracket 21. A slot (not shown in the figure) is provided on the third mounting seat 225. A third rotating shaft (not shown in the figure) rotatably connected to the feeding end cover 222 is provided on the feeding end cover 222. The third rotating shaft is inserted into the slot to realize the rotational connection of the feeding roller 22 to the bracket 21.

[0086] Specifically, the feeding end cover 222 and the third rotating shaft are connected by a second bearing, and a second circlip is provided between the third rotating shaft and the second bearing to fix the position of the second bearing on the third rotating shaft and prevent it from moving axially along the third rotating shaft.

[0087] Further, a first jack is provided on the inner wall of the slot, a second jack is provided on the third rotating shaft, and a first tongue is provided on the third mounting seat 225. The first tongue can pass through the first jack and be inserted into the second jack to restrict the position of the third connecting member 234 in the slot, so that the feeding roller 22 can be firmly installed on the bracket 21. When the first tongue is taken out from the first jack and the second jack, the third rotating shaft can be disengaged from the slot, and the feeding roller 22 can be quickly removed from the bracket 21, so as to install a new heat shrinkable tape 200 on the feeding roller 22 after the heat shrinkable tape 200 wound around the feeding roller 22 is used up, significantly reducing the difficulty of connecting the feeding roller 22 to the bracket 21 and improving the installation and disassembly efficiency of the feeding roller 22 on the bracket 21.

[0088] Optionally, refer to Figure 1 , Figure 3B and Figure 10, the first heating unit 24 includes a first mounting bracket 241 and a plurality of infrared lamp tubes 242 detachably disposed on the first mounting bracket 241. The first mounting bracket 241 is detachably connected to the bracket 21, and the infrared lamp tubes 242 are used to heat the heat shrinkable tape 200. Infrared heating has a high heating efficiency and can also ensure that all parts of the heat shrinkable tape 200 are evenly heated, so that all parts of the heat shrinkable tape 200 can shrink evenly; moreover, infrared rays have a certain penetration ability, which can ensure that the side of the heat shrinkable tape 200 in contact with the pipeline 100 is also heated, improving the comprehensiveness and uniformity of the heat shrinkable tape 200 being heated.

[0089] Exemplarily, the first mounting bracket 241 is detachably connected to the bracket 21 by bolts.

[0090] In this embodiment, referring to Figure 1 , Figure 10 and Figure 11 , the first mounting bracket 241 includes a frame body 2411 detachably disposed on the bracket 21 and a cover body 2412 detachably connected to the frame body 2411. A heating port 24121 is provided on the cover body 2412. When the cover body 2412 is connected to the frame body 2411, an installation space is formed by enclosing the cover body 2412 and the frame body 2411. The infrared lamp tubes 242 are located in the installation space, and at least part of the infrared lamp tubes 242 is exposed at the heating port 24121 to prevent the cover body 2412 from affecting the infrared lamp tubes 242 to heat the heat shrinkable tape 200.

[0091] Specifically, referring to Figure 11 , Figure 12 and Figure 13 , both ends of the infrared lamp tubes 242 are provided with lamp tube brackets 2421, and the lamp tube brackets 2421 are connected to the frame body 2411 by bolts; installation holes are provided on the frame body 2411, and the pipelines 2422 of the infrared lamp tubes 242 pass through the installation holes and are connected to external power supply devices.

[0092] Specifically, referring to Figure 12 , a limiting plate 24111 is provided at one end of the frame body 2411, and a third jack 24112 is provided at the other end. One end of the cover body 2412 can be placed on the limiting plate 24111, and a second tongue 24122 that can be inserted into the third jack 24112 is provided at the other end of the cover body 2412 to realize the connection between the cover body 2412 and the frame body 2411; when the second tongue 24122 is disengaged from the third jack 24112, the cover body 2412 can be separated from the frame body 2411.

[0093] Optionally, referring to Figure 1 and Figure 3C, the heat shrinkable tape winding device 2 further includes a second heating unit 25 detachably disposed on the bracket 21. The second heating unit 25 is located on the side of the feeding roller 22 away from the first heating unit 24 and is configured to secondarily heat the heat shrinkable tape 200, so that the heat shrinkable tape 200 wound around the pipe 100 can be further heated and shrunk, improving the firmness of the connection between the heat shrinkable tape 200 and the pipe 100.

[0094] In this embodiment, the second heating unit 25 includes a second mounting bracket and an intermediate frequency heating element. The second mounting bracket is detachably connected to the bracket 21, and the intermediate frequency heating element is mounted on the second mounting bracket. The intermediate frequency heating element can convert electrical energy into heat energy to heat the heat shrinkable tape 200.

[0095] Exemplarily, the second mounting bracket is detachably connected to the bracket 21 by bolts.

[0096] Embodiment Two

[0097] As Figure 3C and Figure 14 shown, this embodiment provides a joint repair device, including a base 1 and the heat shrinkable tape winding device 2 of Embodiment One. The base 1 is movably mounted on the pipe 100 along the extension direction of the pipe 100. The bracket 21 of the heat shrinkable tape winding device 2 is movably arranged on the base 1 along the circumferential direction of the pipe 100 and is detachably connected to the base 1. The bracket 21 is arranged on the base 1. When the base 1 moves along the extension direction of the pipe 100, it can drive the bracket 21 to move together, so that the heat shrinkable tape winding device 2 can move to any part of the pipe 100 for construction, further improving the automation degree of the winding of the heat shrinkable tape 200. In addition, the bracket 21 is detachably connected to the base 1. When it is not necessary to wind the heat shrinkable tape 200 on the pipe 100, the bracket 21 can be detached from the base 1 to reduce the burden on the base 1 when performing joint repair operations for other processes and improve the moving speed of the base 1.

[0098] In this embodiment, referring to Figure 3C and Figure 14 , the cross-sectional shapes of the bracket 21 and the base 1 are both circular rings. A circular ring-shaped sliding groove is provided on the base 1. The bracket 21 is clamped in the sliding groove and is slidably connected to the sliding groove. When the bracket 21 slides in the sliding groove, the bracket 21 rotates around the extension direction of the pipe 100, so that the pressing roller 23, the feeding roller 22, the first heating unit 24, and the second heating unit 25 mounted on the bracket 21 can all move along the circumferential direction of the pipe 100.

[0099] Specifically, referring to Figure 3C and Figure 14 , the base 1 can be sleeved on the pipe 100, and the base 1 is provided with traveling wheels 11. The traveling wheels 11 can roll on the pipe wall, so that the base 1 can move on the pipe 100.

[0100] Example 3

[0101] As Figure 15 shown, this embodiment provides a method for winding a heat-shrinkable tape. The heat-shrinkable tape 200 is wound around the pipeline 100 by using the heat-shrinkable tape winding device 2 of Example 1, including the following steps:

[0102] S1. Switch the pressing roller 23 to the installation position, and pass the first guiding tape 201 through between the pressing roller 23 and the pipeline 100 via the first heating unit 24 until the first guiding tape 201 moves to the position of the pressing roller 23 and the connected end of the heat-shrinkable tape 200 and the first guiding tape 201 moves to the position of the first heating unit 24.

[0103] When in the installation position, the gap between the pressing roller 23 and the pipeline 100 increases, so that the heat-shrinkable tape 200 and the first guiding tape 201 can pass through between the pressing roller 23 and the pipeline 100, facilitating the movement of the connected end of the heat-shrinkable tape 200 and the first guiding tape 201 to the position of the first heating unit 24 and the movement of the first guiding tape 201 to the position of the pressing roller 23. The connected end of the heat-shrinkable tape 200 and the first guiding tape 201 is located at the first heating unit 24, so that during the winding process, the heat-shrinkable tape 200 unwound from the supply roller 22 onto the pipeline 100 can be heated by the first heating unit 24 to ensure that all the heat-shrinkable tapes 200 wound onto the pipeline 100 can be heated and shrunk. The first guiding tape 201 is pressed by the pressing roller 23 against the pipeline 100, so that during the movement of the bracket 21, the position of the connected end of the heat-shrinkable tape 200 and the first guiding tape 201 on the pipeline 100 is fixed, enabling the other end of the heat-shrinkable tape 200 to gradually unwind from the supply roller 22 onto the pipeline 100 and unwind circumferentially around the pipeline 100.

[0104] Before step S1, preparatory work for heat winding on the pipeline 100 is also required, specifically including the following steps:

[0105] S01. Treat the surface of the pipeline 100: Use tools such as a cleaning cloth and a wire brush to clean the sand, oil, foreign matters, etc. on the pipeline 100; subsequently, perform rust removal treatment by sandblasting to ensure that the surface of the pipeline 100 has no burrs, welding slag and other impurities and meets the relevant standards.

[0106] S02. Preheat the pipeline 100: Use tools such as a flame spray gun to preheat the part of the pipeline 100 to be wound.

[0107] S03. Apply a primer: Use a special paint brush to evenly brush the paint on the construction area of the pipeline 100.

[0108] S04. Remove the supply roller 22 from the bracket 21, wind the heat-shrinkable tape 200 onto the supply roller 22; then install the supply roller 22 back onto the bracket 21.

[0109] S05. Install the base 1 onto the pipeline 100 and drive the base 1 to move until the base 1 moves to the part of the pipeline 100 to be constructed.

[0110] Before step S2 after step S1, the following steps are further included: Drive the bracket 21 to move on the base 1 so that the first heating unit 24 moves to the starting point where the heat shrinkable tape 200 is wound, and ensure that the lapped area meets the construction requirements after the heat shrinkable tape 200 is wound.

[0111] S2. Switch the pressing roller 23 to the pressing position and turn on the first heating unit 24 to ensure that during the subsequent movement of the bracket 21, the heat shrinkable tape 200 unwound onto the pipeline 100 can be heated and can be pressed onto the pipeline 100 by the pressing roller 23 after being attached to the pipeline 100, so as to eliminate the air bubbles between the heat shrinkable tape 200 and the pipeline 100 and ensure the tightness of the attachment and the firmness of the adhesion between the heat shrinkable tape 200 and the pipeline 100.

[0112] Specifically, drive the operating member 231 to rotate, the convex portion 2311 pushes against the connecting member 234 to rotate around the second rotating shaft 2323, the connecting member 234 drives the pressing roller 23 to move, and the elastic potential energy stored in the first elastic member 233 is gradually released until the pressing roller 23 moves to contact the first guiding tape 201 and presses the first guiding tape 201 onto the pipeline 100. At the same time, before the first heating unit 24 is turned on and the bracket 21 does not move, the first heating unit 24 can heat the end of the heat shrinkable tape 200 connected to the first guiding tape 201 so that the heat shrinkable tape 200 shrinks and adheres to the pipeline 100.

[0113] In this embodiment, the second heating unit 25 is also turned on while the first heating unit 24 is turned on to ensure that during the movement of the bracket 21, the second heating unit 25 can perform secondary heating on the heat shrinkable tape 200 attached to the pipeline 100, further increasing the connection strength between the heat shrinkable tape 200 and the pipeline 100.

[0114] S3. Drive the bracket 21 to move along the direction from the pressing roller 23 via the first heating unit 24 to the feeding roller 22, the heat shrinkable tape 200 located on the feeding roller 22 is unwound onto the pipeline 100, and the heat shrinkable tape 200 unwound onto the pipeline 100 is heated by the first heating unit 24 in sequence and is pressed onto the pipeline 100 by the pressing roller 23.

[0115] In this embodiment, referring to the orientation in Figure 1 the bracket 21 moves in the counterclockwise direction so that the feeding roller 22 can be located at the starting end of the movement and the pressing roller 23 can be located at the end of the movement during the movement.

[0116] Specifically, in the initial stage of movement, the first guiding belt 201 is pressed against the pipeline 100 by the pressing roller 23. The heat-shrinkable belt 200 is gradually unwound from the feeding roller 22 under the drag of the first guiding belt 201. During the subsequent movement, the heat-shrinkable belt 200 pressed by the pressing roller 23 can drag the heat-shrinkable belt 200 on the feeding roller 22 down; moreover, during this process, the feeding roller 22 will rotate selflessly to avoid affecting the unwinding of the heat-shrinkable belt 200. After the heat-shrinkable belt 200 is unwound onto the pipeline 100, the first heating unit 24 first performs primary heating on the heat-shrinkable belt 200, and the heat-shrinkable belt 200 shrinks and fits against the pipe wall of the pipeline 100; subsequently, the pressing roller 23 moves to the heat-shrinkable belt 200 that has just been heated by the first heating unit 24, so that this part of the heat-shrinkable belt 200 can be closely attached to and bonded with the pipeline 100; at the same time, the pressing roller 23 rolls on the surface of the heat-shrinkable belt 200 to avoid damaging the heat-shrinkable belt 200; next, the second heating unit 25 moves to the heat-shrinkable belt 200 that has just been pressed and performs secondary heating on this part of the heat-shrinkable belt 200. When the length of the heat-shrinkable belt 200 wound on the pipeline 100 meets the requirements, the driving bracket 21 is stopped from moving.

[0117] Further, after the bracket 21 rotates a certain angle and the pressing roller 23 presses one end of the heat-shrinkable belt 200 connected to the first guiding belt 201 against the pipeline 100, the staff can separate the first guiding belt 201 from the heat-shrinkable belt 200 and remove the first guiding belt 201 from the pipeline 100 to avoid the first guiding belt 201 affecting the subsequent lapping of the heat-shrinkable belt 200.

[0118] Exemplarily, the first guiding belt 201 can be removed from the pipeline 100 after the bracket 21 rotates 20°.

[0119] S4. After the heat-shrinkable belt 200 is wound on the pipeline 100, the second guiding belt 202 is separated from the heat-shrinkable belt 200 and the second guiding belt 202 is removed from the pipeline 100.

[0120] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A heat shrinkable tape winding device (2), wherein a first guiding tape (201) for positioning the starting position of the winding of the heat shrinkable tape (200) is arranged at the end of the heat shrinkable tape (200), characterized in that, The heat shrinkable tape winding device (2) includes: A bracket (21) that can be movably installed on the pipeline (100) along the circumferential direction of the pipeline (100); A feeding roller (22) rotatably arranged on the bracket (21) along its axial direction, and the heat shrinkable tape (200) can be wound around the feeding roller (22); A pressing roller (23) movably arranged on the bracket (21), the pressing roller (23) has an installation position and a pressing position. In the pressing position, the pressing roller (23) can press the heat shrinkable tape (200) or the first guiding tape (201) against the pipeline (100) and can roll relative to the heat shrinkable tape (200) or the first guiding tape (201); in the installation position, the pressing roller (23) can be separated from the heat shrinkable tape (200) or the first guiding tape (201); A first heating unit (24) arranged between the pressing roller (23) and the feeding roller (22), and the first heating unit (24) is configured to heat the heat shrinkable tape (200).

2. The heat-shrinkable tape winding device (2) according to claim 1, characterized in that, The heat shrinkable tape winding device (2) further includes an operating member (231) rotatably connected to the bracket (21). A convex portion (2311) in contact with the pressing roller (23) is provided on the operating member (231). By driving the operating member (231) to rotate, the convex portion (2311) pushes the pressing roller (23) to move, and the pressing roller (23) switches between the installation position and the pressing position.

3. The heat-shrinkable tape winding device (2) according to claim 2, characterized in that, An arc-shaped limiting block (2322) is provided on the bracket (21), and an arc-shaped groove (2312) is provided on the operating member (231). The arc-shaped limiting block (2322) is located in the arc-shaped groove (2312). In the installation position, the groove wall of the arc-shaped groove (2312) contacts the first side wall (23221) of the arc-shaped limiting block (2322). In the pressing position, the groove wall of the arc-shaped groove (2312) contacts or has a clearance fit with the second side wall (23222) of the arc-shaped limiting block (2322). The first side wall (23221) and the second side wall (23222) are respectively two opposite side walls of the arc-shaped limiting block (2322) along its extending direction.

4. The heat-shrinkable tape winding device (2) according to claim 1, wherein, The heat shrinkable tape winding device (2) further includes a first elastic member (233) and a connecting member (234). A second rotating shaft (2323) is provided on the bracket (21). One end of the connecting member (234) is connected to the pressing roller (23), and the other end is sleeved on the second rotating shaft (2323) and rotatably connected to the second rotating shaft (2323). One end of the first elastic member (233) is wound around the second rotating shaft (2323), and the other end is connected to the connecting member (234). The pressing roller (23) can automatically switch from the installation position to the pressing position under the elastic force of the first elastic member (233).

5. The heat-shrinkable tape winding device (2) according to claim 1, characterized in that, A flexible tension belt (223) is movably arranged on the bracket (21). A friction wheel (2221) is arranged on the feeding roller (22). Two ends of the flexible tension belt (223) are respectively connected to the bracket (21), and a part of the flexible tension belt (223) is in contact with the friction wheel (2221) and is rotationally matched with the friction wheel (2221).

6. The heat-shrinkable tape winding device (2) according to claim 5, characterized in that, One end of the flexible tension belt (223) is provided with a second connecting shaft (2231) connected to the bracket (21). An adjusting member (22311) and a second elastic member (22312) are arranged on the second connecting shaft (2231). The adjusting member (22311) is located at an end of the second connecting shaft (2231) away from the flexible tension belt (223) and is adjustable in position on the second connecting shaft (2231). One end of the second elastic member (22312) is connected to the adjusting member (22311), and the other end is connected to the flexible tension belt (223).

7. The heat-shrinkable tape winding device (2) according to claim 1, characterized in that, The first heating unit (24) includes a first mounting frame (241) and a plurality of infrared lamp tubes (242) detachably arranged on the first mounting frame (241). The first mounting frame (241) is detachably connected to the bracket (21). The infrared lamp tubes (242) are used for heating the heat shrinkable tape (200).

8. The heat-shrinkable tape winding device (2) according to any one of claims 1-7, characterized in that, The heat shrinkable tape winding device (2) further includes a second heating unit (25) detachably arranged on the bracket (21). The second heating unit (25) is located on a side of the feeding roller (22) away from the first heating unit (24) and is configured to perform secondary heating on the heat shrinkable tape (200).

9. A field joint coating device, characterized in that, It includes a base (1) and the heat shrinkable tape winding device (2) according to any one of claims 1-8. The base (1) can be movably installed on the pipeline (100) along the extending direction of the pipeline (100). The bracket (21) of the heat shrinkable tape winding device (2) is movably arranged on the base (1) along the circumferential direction of the pipeline (100) and is detachably connected to the base (1).

10. A method for winding a heat-shrinkable tape, characterized in that, Using the heat shrinkable tape winding device (2) according to any one of claims 1-8 to wind the heat shrinkable tape (200) onto the pipeline (100) includes the following steps: S1. Switch the pressing roller (23) to the installation position, and pass the first guiding belt (201) through between the pressing roller (23) and the pipeline (100) via the first heating unit (24) until the first guiding belt (201) moves to the position of the pressing roller (23), and one end of the heat shrinkable tape (200) connected to the first guiding belt (201) moves to the position of the first heating unit (24). S2. Switch the pressing roller (23) to the pressing position, and turn on the first heating unit (24). S3. Drive the bracket (21) to move along the direction from the pressing roller (23), through the first heating unit (24) to the feeding roller (22). The heat-shrinkable tape (200) located on the feeding roller (22) is gradually unwound onto the pipeline (100). The heat-shrinkable tape (200) unwound onto the pipeline (100) is successively heated by the first heating unit (24) and pressed onto the pipeline (100) by the pressing roller (23).

Images