Heat shrink sleeve baking equipment for steel-plastic conversion elbows used in urban gas transmission and distribution projects

Abstract

The present invention provides a heat shrink sleeve baking device for steel-plastic conversion elbow pipes for urban gas transmission and distribution projects, comprising a frame, a displacement mechanism, a baking assembly and a clamping assembly; the frame is provided with at least one clamping positioning hole, and the clamping positioning hole is used to penetrate and fix the steel-plastic conversion elbow pipe; the displacement mechanism is arranged on the frame and the output end has the freedom to move along the extension track of the steel-plastic conversion elbow pipe; the baking assembly is connected to the output end of the displacement mechanism and has at least one annular baking hole, each of which is respectively used to correspond to the annular sleeve and circumferentially heat the heat shrink sleeve; the clamping assembly is arranged on the frame and has at least one clamping port, each of which is respectively used to correspond to the end of the clamping heat shrink sleeve. The heat shrink sleeve baking device for steel-plastic conversion elbow pipes for urban gas transmission and distribution projects provided by the present invention can solve the problem of wrinkles on the heat shrink sleeve in the curved section, and improve the efficiency and molding quality of baking the heat shrink sleeve on the steel-plastic conversion elbow pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of heat shrinkable sleeve installation, and specifically relates to a heat shrinkable sleeve baking device for a steel-plastic conversion elbow for a town gas transmission and distribution project. Background Art

[0002] A large number of steel-plastic conversion pipe fittings are used in the process of urban gas transmission and distribution projects such as gas pipeline installation and construction. Based on the planning of pipeline design paths, steel-plastic conversion pipe fittings require not only straight pipes but also curved pipes. In addition, both straight pipes and curved pipes will be coated with heat shrink tubing to form anti-corrosion protection for the metal pipe body. At present, most construction sites still use manual handheld baking guns to heat the heat shrink tubing to shrink the heat shrink tubing and bond it to the outer wall of the steel-plastic conversion pipe fittings. Considering that manual operation not only cannot guarantee high quality, but also has low efficiency, automatic baking equipment for heat shrink tubing installation has begun to appear to replace manual operations.

[0003] Most of the automatic baking equipment currently available use a displacement mechanism to drive an annular heating device to move slowly along the extension direction of the steel-plastic conversion sleeve, thereby heating the pre-installed heat shrink sleeve. This method can indeed achieve the expected baking effect for straight pipes, but for bent pipes, since the curvature of the heat shrink sleeve at different circumferential positions at the bent position is different, obvious wrinkles will appear on the inner side of the bend during the baking process of the bent position, thereby affecting the molding quality of the heat shrink sleeve. As a result, a large number of products need to be reworked and manually processed again, which not only causes material loss and waste but also affects production efficiency. Therefore, it is urgent to develop an improvement plan to address the problem of low yield of baking and installation of heat shrink sleeves for steel-plastic conversion bent pipes using existing automatic baking equipment. Summary of the invention

[0004] The embodiment of the present invention provides a heat shrink sleeve baking device for steel-plastic conversion elbows for urban gas transmission and distribution projects, aiming to improve the heat shrink sleeve baking molding quality of the steel-plastic conversion elbows, thereby improving the yield of automated production of the equipment.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a heat shrink sleeve baking device for a steel-plastic conversion elbow for urban gas transmission and distribution engineering, wherein the steel-plastic conversion elbow comprises a first straight section and a second straight section connected by a curved section, and a convex plastic joint is provided at the end of the second straight section; the heat shrink sleeve is used to cover the convex plastic joint, the second straight section, the curved section and part of the first straight section; the heat shrink sleeve baking device comprises:

[0006] The frame is provided with at least one clamping positioning hole, and the clamping positioning hole is used to penetrate and fix the first straight-through section and make the second straight-through section vertical;

[0007] A displacement mechanism is arranged on the frame and has a first degree of freedom of axial movement along the first straight-through section, a second degree of freedom of axial movement along the second straight-through section, and a third degree of freedom of rotation perpendicular to the first straight-through section and the second straight-through section at the output end;

[0008] A baking assembly is connected to the output end of the displacement mechanism and has at least one annular baking hole, each of which is used to correspond to the annular sleeve and circumferentially heat the heat shrink sleeve;

[0009] The clamping assembly is arranged on the frame and has at least one clamping opening, and each clamping opening is respectively used for correspondingly clamping the end of the heat shrink sleeve located on the first straight section.

[0010] In a possible implementation, the clamping assembly includes:

[0011] A base is fixedly connected to the frame, and a slide rail extending along the axial direction of the first straight section is provided on the base;

[0012] A slide seat is slidably connected to the slide rail, and the slide seat is provided with at least one set of clamping jaws, each set of clamping jaws forming a clamping opening;

[0013] The first driving component is arranged on the base and the output end of the first driving component is transmission-connected with the slide seat.

[0014] In some embodiments, the clamping jaws include:

[0015] A bidirectional cylinder, fixedly connected to the slide, has two output ends that move synchronously back to back towards each other;

[0016] The two arc-shaped claw bodies are arranged opposite to each other and are respectively connected to the two output ends of the bidirectional cylinder.

[0017] Exemplarily, the first drive assembly includes:

[0018] A driving seat, fixedly connected to the sliding seat;

[0019] A first lead screw passes through the slide and is matched with the slide thread, and two ends of the first lead screw are respectively rotatably connected to the base;

[0020] The first motor is connected to the base and an output end of the motor is connected to the first lead screw.

[0021] For example, a clamping sleeve is fixedly inserted into the clamping positioning hole, a positioning head is threaded into the clamping sleeve, and the positioning head is used to abut and position the first straight section.

[0022] In one possible implementation, a controller is provided on the frame, and the controller is electrically connected to the displacement mechanism, baking assembly, and clamping assembly respectively; a laser generator is provided on the frame directly above each clamping positioning hole, and the laser generator is electrically connected to the controller and is used to emit a laser beam toward the second through section.

[0023] In some embodiments, the baking assembly includes:

[0024] A shell body is connected to the output end of the displacement mechanism, and annular baking holes are distributed at intervals on the shell body;

[0025] At least one heat-conducting sleeve is rotatably connected to each annular baking hole, a plurality of heating unit tubes are distributed at intervals on the inner circumferential wall of each heat-conducting sleeve, and each heat-conducting sleeve is coaxially connected to a gear ring;

[0026] The rotary drive member is arranged in the shell and is electrically connected to the controller. The output end of the rotary drive member is connected to a driving gear, and the driving gear is meshed with the gear ring.

[0027] Exemplarily, the displacement mechanism includes:

[0028] A fixed bracket is fixedly connected to the side of the frame, the top wall and the side wall of the fixed bracket are both provided with a first guide rail, the first guide rail extends along the axial direction of the first straight section, and the fixed bracket is provided with a second driving assembly controlled by the controller;

[0029] A moving bracket is slidably connected to each of the first guide rails and connected to the output end of the second driving assembly. The moving bracket is provided with a third driving assembly controlled by a controller and a second guide rail extending along the axial direction of the second straight-through section. A lifting seat is slidably connected to the second guide rail, and the lifting seat is connected to the output end of the third driving assembly.

[0030] The rotating power member is connected to the lifting seat and controlled by the controller. The rotating power member has a rotating output end for connecting to the baking component.

[0031] For example, the second drive component includes:

[0032] A second lead screw passes through the movable bracket along the axial direction of the first guide rail and is threadedly engaged with the movable bracket, and two ends of the second lead screw are respectively rotatably connected to the fixed bracket;

[0033] The second motor is arranged on the fixed bracket and the output end of the motor is connected to the second lead screw.

[0034] In some embodiments, the third drive assembly includes:

[0035] A third lead screw passes through the lifting seat along the axial direction of the second guide rail and is matched with the lifting seat thread, and two ends of the third lead screw are respectively rotatably connected to the moving bracket;

[0036] The third motor is arranged on the moving support and the output end of the motor is connected to the third lead screw.

[0037] The beneficial effect of the heat shrink sleeve baking device for steel-plastic conversion elbow pipe for urban gas transmission and distribution projects provided by the present invention is that: compared with the prior art, the heat shrink sleeve baking device for steel-plastic conversion elbow pipe for urban gas transmission and distribution projects provided by the present invention, the first straight-through section of the steel-plastic conversion elbow pipe is inserted into the clamping positioning hole and the second straight-through section is formed into a vertical state, and then the displacement mechanism and the baking component are started, and the heat shrink sleeve is baked from the convex plastic joint. When the heat shrink sleeve is heated and shrinks to wrap the convex plastic joint and the second straight-through section, the clamping mouth of the clamping component shrinks and clamps the end of the heat shrink sleeve located on the first straight-through section, and then the baking component bakes the curved arc section driven by the output end of the displacement mechanism. During baking, the heat shrink sleeve is restricted by the clamping force of the clamping assembly and cannot shrink axially. Therefore, during the heating process of the curved section, the heat shrink sleeve simply shrinks radially, thereby ensuring that each circumferential position of the heat shrink sleeve has sufficient heat shrinkage to fit the surface of the curved section, thereby solving the problem of wrinkles on the heat shrink sleeve in the curved section. After the heat shrinkage of the curved section is completed, the clamping assembly can cancel the clamping force until the heat shrinkage of the first straight section is completed. This can not only improve the efficiency of baking the heat shrink sleeve on the steel-plastic conversion curved pipe, but also improve the coating quality of the heat shrink sleeve on the steel-plastic conversion curved pipe, especially on the curved section, thereby improving the yield rate of automated production instead of manual production. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of the three-dimensional structure of a heat shrink sleeve baking device for a steel-plastic conversion elbow for a town gas transmission and distribution project provided by an embodiment of the present invention;

[0039] Figure 2 It is a three-dimensional structural diagram of a steel-plastic conversion elbow that needs to be baked with a heat shrink sleeve;

[0040] Figure 3 A schematic diagram of the three-dimensional structure of a clamping assembly used in an embodiment of the present invention;

[0041] Figure 4 Schematic diagram of the installation structure of the first straight section on the rack in an embodiment of the present invention;

[0042] Figure 5 It is a schematic diagram of the three-dimensional structure of the displacement mechanism and the baking assembly used in the embodiment of the present invention.

[0043] In the figure: 10, steel-plastic conversion elbow; 11, first straight section; 12, second straight section; 13, curved section; 14, convex plastic joint; 20, heat shrink sleeve; 30, frame; 31, clamping sleeve; 32, positioning head; 40, displacement mechanism; 41, fixed bracket; 411, first guide rail; 412, second drive assembly; 4121, second lead screw; 4122, second motor; 42, moving bracket; 421, third drive assembly; 4211, third lead screw; 4212, third motor; 422, second guide rail; 423, lifting mechanism Seat; 43, rotating power part; 50, baking component; 500, annular baking hole; 51, shell; 52, heat-conducting sleeve; 521, heating unit tube; 522, gear ring; 53, rotating driving part; 531, driving gear; 60, clamping component; 61, base; 611, slide rail; 62, slide seat; 621, clamping claw; 6211, two-way cylinder; 6212, arc-shaped claw body; 63, first driving component; 631, driving seat; 632, first lead screw; 633, first motor; 70, controller; 80, laser generator. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] It should be noted that when an element is referred to as being "disposed on" or "connected to" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, 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, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meanings of "multiple" and "several" are two or more, unless otherwise clearly and specifically defined.

[0046] Please also read Figures 1 to 5, the heat shrink sleeve baking equipment for the steel-plastic conversion elbow for urban gas transmission and distribution projects provided by the present invention is now described. The heat shrink sleeve baking equipment for the steel-plastic conversion elbow for urban gas transmission and distribution projects, the steel-plastic conversion elbow 10 includes a first straight section 11 and a second straight section 12 connected by a curved section 13, and a convex plastic joint 14 is provided at the end of the second straight section 12; the heat shrink sleeve 20 is used to cover the convex plastic joint 14, the second straight section 12, the curved section 13 and part of the first straight section 11; the heat shrink sleeve baking equipment includes a frame 30, a displacement mechanism 40, a baking assembly 50 and a clamping assembly 60; wherein the frame 30 is provided with at least one clamping positioning hole, the clamping positioning hole is used to penetrate and fix the first straight section 11 and make the second straight section 12 vertical; The displacement mechanism 40 is arranged on the frame 30 and the output end has a first degree of freedom of axial movement along the first straight section 11, a second degree of freedom of axial movement along the second straight section 12, and a third degree of freedom of rotational movement perpendicular to the first straight section 11 and the second straight section 12; the baking component 50 is connected to the output end of the displacement mechanism 40 and has at least one annular baking hole 500, each annular baking hole 500 is respectively used to correspond to the annular sleeve and circumferentially heat the heat shrink sleeve 20; the clamping component 60 is arranged on the frame 30 and has at least one clamping opening, each clamping opening is respectively used to correspond to the end of the heat shrink sleeve 20 located on the first straight section 11.

[0047] It should be noted that the main body of the steel-plastic conversion elbow 10 is a steel pipe with a curved section 13, one end of which is provided with a convex-shaped plastic joint, namely a convex plastic joint 14, and the other end forms a straight steel joint. In order to meet the anti-corrosion requirements, the steel pipe needs to be covered with a heat shrink sleeve 20, and the heat shrink sleeve 20 is usually made of PE anti-corrosion material. At the same time, in order to avoid damage to the heat shrink sleeve 20 during the connection of the straight steel joint (welding heating), the heat shrink sleeve 20 usually only wraps a part of the first straight section 11.

[0048] In this embodiment, the output end of the displacement mechanism 40 can drive the baking component 50 to move along the extension path of the steel-plastic conversion elbow 10 based on the first degree of freedom, the second degree of freedom and the third degree of freedom. Specifically, the heat shrink sleeve 20 sleeved on the convex plastic joint 14 is first heated and shrunk to be tightly wrapped. Since the convex plastic joint 14 has an outer diameter greater than the second straight-through section 12, the heat shrink sleeve 20 can be fixed at the position of the convex plastic joint 14 at this time, and then the second straight-through section 12 is started to be baked. After the heat shrink sleeve 20 is tightly wrapped on the second straight-through section 12, the other end of the heat shrink sleeve 20 located on the first straight-through section 11 is clamped by the clamping component 60, and then the curved section 13 is baked. Since the heat shrink sleeve 20 itself is a straight tube, it is bent in the curved section 13 only after being sleeved on the steel-plastic conversion elbow 10. Therefore, the heat shrink sleeve 20 is bent in the curved section The inner arc side of the segment 13 has wrinkles. During the baking process, the heat shrink sleeve 20 cannot perform overall axial contraction due to the fixation of the clamping assembly 60. Instead, the inner arc side of the curved segment 13 performs axial and radial synchronous contraction due to the presence of the wrinkles, and the outer arc side of the curved segment 13 cannot contract axially due to the absence of axial margin and can only contract radially. This can prevent the increase of wrinkles on the inner arc side of the heat shrink sleeve 20. The above-mentioned contraction continues to occur during the baking process, so that the heat shrink sleeve 20 can wrap the curved segment 13 tightly and evenly, and finally the wrinkles on the inner arc side are completely contracted to form a smooth surface. After the heat shrinkage of the curved segment 13 is completed, in order to prevent the clamping assembly 60 from affecting the movement of the baking assembly 50 in the first straight segment 11, the clamping assembly 60 can be released from the heat shrink sleeve 20, thereby successfully completing the heat shrinkage process of the first straight segment 11. It should be understood that the heat shrinking process of the above-mentioned heat shrinkable sleeve 20 at each position of the steel-plastic conversion bend 10 can be that the displacement mechanism 40 drives the baking component 50 to bake repeatedly. In addition, before the heat shrinkable sleeve 20 is put on the steel-plastic conversion bend 10, glue should be applied to the steel-plastic conversion bend 10 in advance, thereby ensuring that the heat shrinkable sleeve 20 can be bonded and fixed after wrapping the steel-plastic conversion bend 10, avoiding the presence of gaps that affect the anti-corrosion effect.

[0049] The heat shrink sleeve baking equipment for the steel-plastic conversion elbow for urban gas transmission and distribution projects provided in this embodiment is different from the prior art in that the first straight-through section 11 of the steel-plastic conversion elbow 10 is inserted into the clamping positioning hole and the second straight-through section 12 is formed into a vertical state, and then the displacement mechanism 40 and the baking component 50 are started to bake the heat shrink sleeve 20 starting from the convex plastic joint 14. When the heat shrink sleeve 20 is heated and shrinks to tightly wrap the convex plastic joint 14 and the second straight-through section 12, the clamping mouth of the clamping component 60 shrinks and clamps the end of the heat shrink sleeve 20 located on the first straight-through section 11. Then, the baking component 50 bakes the curved arc section 13 driven by the output end of the displacement mechanism 40. At this time, the heat shrink sleeve 20 is constrained by the clamping component 60 clamping force and cannot shrink axially. Therefore, during the heating process of the curved section 13, the heat shrink sleeve 20 simply shrinks radially, thereby ensuring that each circumferential position of the heat shrink sleeve 20 can have sufficient heat shrinkage and fit the surface of the curved section 13, thereby solving the problem of wrinkles on the heat shrink sleeve 20 in the curved section 13. After the heat shrinkage of the curved section 13 is completed, the clamping component 60 can cancel the clamping force until the heat shrinkage of the first straight section 11 is completed. Not only can the efficiency of baking the heat shrink sleeve 20 on the steel-plastic conversion curved pipe 10 be improved, but also the coating quality of the heat shrink sleeve 20 on the steel-plastic conversion curved pipe 10, especially on the curved section 13, can improve the yield of automated production instead of manual production.

[0050] In some embodiments, see Figures 1 to 3 The clamping assembly 60 includes a base 61, a slide 62, and a first driving assembly 63; the base 61 is fixedly connected to the frame 30, and a slide rail 611 extending axially along the first straight section 11 is provided on the base 61; the slide 62 is slidably connected to the slide rail 611, and at least one group of clamping jaws 621 is provided on the slide 62, and each group of clamping jaws 621 forms a clamping port; the first driving assembly 63 is arranged on the base 61 and the output end is transmission-connected to the slide 62.

[0051] By utilizing the first driving assembly 63 to drive the slide 62 to move axially along the first straight section 11 on the base 61, the position of the clamp 621 can be adjusted so that the clamp 621 can accurately clamp the end of the heat shrink sleeve 20. At the same time, after the heat shrinkage of the curved section 13 is completed, the clamp 621 can be loosened to move it outside the end of the heat shrink sleeve 20, thereby avoiding movement interference between the clamp 621 and the baking assembly 50 during the heat shrinkage of the first straight section 11. On the other hand, by driving the clamp 621 to move through the slide 62, traction can be generated on the heat shrink sleeve 20 during the heat shrinkage of the curved section 13, thereby flattening the wrinkles, which can further ensure the heat shrinkage quality of the curved section 13.

[0052] As a specific implementation of the above-mentioned clamping jaw 621, please refer to Figure 3The clamp 621 includes a bidirectional cylinder 6211 and two arc-shaped claw bodies 6212; wherein the bidirectional cylinder 6211 is fixedly connected to the slide 62 and has two output ends that move back to back and synchronously toward each other; the two arc-shaped claw bodies 6212 are arranged opposite to each other and are respectively connected to the two output ends of the bidirectional cylinder 6211.

[0053] The bidirectional cylinder 6211 means that both ends of the cylinder have cylinder rods extending outward, and the cylinder has two pistons connected to the cylinder rods at both ends. When air is introduced between the two pistons, the two pistons move away synchronously, and the cylinder rods at both ends extend synchronously. When air is introduced to the outsides of the two pistons at the same time, the two pistons move toward each other synchronously, and the cylinder rods at both ends shrink synchronously. The two output ends of the bidirectional cylinder 6211 drive one of the arc-shaped claws 6212 to move toward or away synchronously, so as to achieve the centering clamping and anti-loosening of the heat shrink sleeve 20, and the structure is simple and compact.

[0054] It should be noted that in order to improve the stability of the steel-plastic conversion elbow 10, the clamping assembly 60 can clamp the end of the heat shrink sleeve 20 during the heat shrinkage of the curved section 13, and clamp the position of the first straight section 11 to expose the heat shrink sleeve 20 during the heat shrinkage of other parts, so that the clamping port forms an auxiliary clamping for the first straight section 11.

[0055] As a specific implementation of the first driving assembly 63, please refer to Figure 3 The first driving assembly 63 includes a driving seat 631, a first lead screw 632 and a first motor 633; ​​wherein the driving seat 631 is fixedly connected to the slide 62; the first lead screw 632 passes through the slide 62 and is threadedly matched with the slide 62, and the two ends of the first lead screw 632 are respectively rotatably connected to the base 61; the first motor 633 is connected to the base 61 and the output end is connected to the first lead screw 632.

[0056] In order to ensure the accuracy of the movement position, the first motor 633 can specifically be a servo motor, which drives the first screw 632 to rotate, thereby driving the drive seat 631 to move axially along the first screw 632, thereby realizing the movement of the slide 62. The structure is simple and compact and the movement accuracy is high.

[0057] For some possible implementations, see Figure 1 and Figure 4A clamping sleeve 31 is fixedly inserted into the clamping positioning hole, and a positioning head 32 is screwed into the clamping sleeve 31. The positioning head 32 is used to abut and position the first straight section 11. The clamping sleeve 31 has an inner hole that matches the outer diameter of the first straight section 11. The first straight section 11 is inserted into the clamping sleeve 31 and abuts against the positioning head 32 to achieve the fixation of the steel-plastic conversion elbow 10. By replacing or screwing the positioning head 32, the insertion depth of the first straight section 11 can be adjusted, thereby adjusting the position of the steel-plastic conversion elbow 10, thereby achieving the baking of heat shrink sleeves 20 of different lengths while maintaining the existing control program of the displacement mechanism 40.

[0058] In some embodiments, such as Figure 1 As shown, a controller 70 is provided on the frame 30, and the controller 70 is electrically connected to the displacement mechanism 40, the baking assembly 50, and the clamping assembly 60 respectively; a laser generator 80 is provided on the frame 30 directly above each clamping positioning hole, and the laser generator 80 is electrically connected to the controller 70 and is used to emit a laser beam toward the second straight-through section 12.

[0059] By setting up the controller 70, automatic control of the displacement mechanism 40, the baking component 50 and the clamping component 60 can be achieved. At the same time, in order to ensure the fixed state of the steel-plastic conversion elbow 10, a laser generator 80 is set just above the clamping positioning hole. During installation, the laser beam emitted by the laser generator 80 irradiates the center of the second straight-through section 12, which indicates that the second straight-through section 12 is in a vertical state. Therefore, when baking the second straight-through section 12, the inner wall of the annular baking hole 500 and the outer peripheral wall of the second straight-through section 12 are at the same distance from each position, thereby ensuring baking uniformity.

[0060] Specifically, the optional structure of the baking component 50 in this embodiment is as follows: Figure 5 As shown, the baking assembly 50 includes a shell 51, at least one heat-conducting sleeve 52, and a rotating drive member 53; wherein the shell 51 is connected to the output end of the displacement mechanism 40, and annular baking holes 500 are distributed at intervals on the shell 51; each heat-conducting sleeve 52 is rotatably connected to each annular baking hole 500, and a plurality of heating unit tubes 521 are distributed at intervals on the inner circumferential wall of each heat-conducting sleeve 52, and each heat-conducting sleeve 52 is coaxially connected with a gear ring 522; the rotating drive member 53 is arranged in the shell 51 and is electrically connected to the controller 70, and the output end of the rotating drive member 53 is connected to a driving gear 531, and the driving gear 531 is meshed with the gear ring 522.

[0061] By rotating the heat-conducting sleeve 52 in the annular baking hole 500, the heating unit tubes 521 spaced apart on the inner wall of the heat-conducting sleeve 52 are used as heat sources to bake the heat shrink sleeve 20 passing through the heat-conducting sleeve 52. At the same time, after the heat-conducting sleeve 52 itself is heated, a continuous annular heat source can be formed on the outer periphery of the heat shrink sleeve 20, which is beneficial to improving the baking uniformity. Furthermore, the rotating driving member 53 is used to drive the gear ring 522 to rotate, thereby enabling the heat-conducting sleeve 52 to rotate, thereby avoiding the problem of uneven circumferential heating of the heat shrink sleeve 20 caused by the deviation in the heat generation of the heating unit tubes 521, thereby improving the heating uniformity of the heat shrink sleeve 20 and improving the heat shrink molding quality.

[0062] Optionally, the implementation method of the displacement mechanism 40 in this embodiment can be found in Figure 1 and Figure 5 The displacement mechanism 40 includes a fixed bracket 41, a movable bracket 42 and a rotating power member 43; wherein the fixed bracket 41 is fixedly connected to the side of the frame 30, and the top wall and side wall of the fixed bracket 41 are both provided with a first guide rail 411, the first guide rail 411 extends along the axial direction of the first straight section 11, and the fixed bracket 41 is provided with a second driving component 412 controlled by the controller 70; the movable bracket 42 is slidably connected to each first guide rail 411 and connected to the output end of the second driving component 412, the movable bracket 42 is provided with a third driving component 421 controlled by the controller 70, and a second guide rail 422 extending along the axial direction of the second straight section 12, and a lifting seat 423 is slidably connected to the second guide rail 422, and the lifting seat 423 is connected to the output end of the third driving component 421; the rotating power member 43 is connected to the lifting seat 423 and is controlled by the controller 70, and the rotating power member 43 has a rotating output end for connecting the baking component 50.

[0063] The second driving component 412 can be used to move the movable bracket 42 along the first guide rail 411, and the third driving component 421 can lift the lifting seat 423, so that the baking component 50 can move to any position on the vertical plane parallel to the steel-plastic conversion elbow 10. On this basis, the rotating power part 43 connected to the lifting seat 423 can drive the baking component 50 to swing about the rotating axis perpendicular to the vertical plane, so that the baking component 50 can pass through the second straight section 12, the curved section 13 and the first straight section 11 in sequence, and the structure is simple and stable.

[0064] Specifically, the rotating power part 43 may be a servo motor or a stepper motor capable of accurately outputting the rotation angle. When passing through the curved arc segment 13 , the second drive component 412 , the third drive component 421 and the rotating power part 43 may coordinate their actions based on the control program preset in the controller 70 .

[0065] Figure 5An optional implementation of the second drive assembly 412 is given in the figure, and the second drive assembly 412 includes a second lead screw 4121 and a second motor 4122; the second lead screw 4121 passes through the movable bracket 42 along the axial direction of the first guide rail 411 and is threadedly engaged with the movable bracket 42, and both ends of the second lead screw 4121 are rotatably connected to the fixed bracket 41; the second motor 4122 is disposed on the fixed bracket 41 and the output end is connected to the second lead screw 4121. The second motor 4122 can be a servo motor, which drives the second lead screw 4121 to rotate, thereby driving the movable bracket 42 to perform horizontal linear motion through the second lead screw 4121, and has a simple structure, stable transmission and high motion accuracy.

[0066] For an example, see Figure 5 The third driving assembly 421 includes a third lead screw 4211 and a third motor 4212; the third lead screw 4211 passes through the lifting seat 423 along the axial direction of the second guide rail 422 and is threadedly matched with the lifting seat 423, and both ends of the third lead screw 4211 are rotatably connected to the moving bracket 42; the third motor 4212 is provided on the moving bracket 42 and the output end is connected to the third lead screw 4211. The third motor 4212 can be a servo motor, which drives the third lead screw 4211 to rotate, thereby driving the lifting seat 423 to perform lifting linear motion, with a simple structure, stable transmission and high motion accuracy.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Heat shrink sleeve baking equipment for steel-plastic conversion elbow pipes used in urban gas transmission and distribution projects, characterized in that: The steel-plastic conversion elbow comprises a first straight section and a second straight section connected by a curved section, and a convex plastic joint is provided at the end of the second straight section; the heat shrink sleeve is used to cover the convex plastic joint, the second straight section, the curved section and part of the first straight section; The heat shrink sleeve baking equipment comprises: The frame is provided with at least one clamping positioning hole, wherein the clamping positioning hole is used to penetrate and fix the first straight-through section and make the second straight-through section vertical; a displacement mechanism, which is disposed on the frame and has an output end having a first degree of freedom of axial movement along the first straight-through section, a second degree of freedom of axial movement along the second straight-through section, and a third degree of freedom of rotational movement perpendicular to the first straight-through section and the second straight-through section; A baking assembly, connected to the output end of the displacement mechanism and having at least one annular baking hole, each of the annular baking holes being used to correspond to a ring sleeve and circumferentially heat the heat shrink sleeve; A clamping assembly, disposed on the frame and having at least one clamping opening, each of the clamping openings being used to clamp an end of the heat shrink sleeve located on the first straight-through section; The displacement mechanism and the baking assembly bake the heat shrink sleeve starting from the convex plastic joint, and when the heat shrink sleeve shrinks and wraps the convex plastic joint and the second straight-through section due to the heat, the clamping opening of the clamping assembly shrinks and clamps the end of the heat shrink sleeve located on the first straight-through section, and then the baking assembly bakes the curved section driven by the output end of the displacement mechanism; The clamping assembly comprises: A base, fixedly connected to the frame, wherein the base is provided with a slide rail extending along the axial direction of the first straight-through section; A slide seat, slidably connected to the slide rail, the slide seat is provided with at least one set of clamping jaws, each set of the clamping jaws forms a clamping opening; A first driving assembly, which is disposed on the base and has an output end drivingly connected to the slide seat; After the heat shrinkage of the curved section is completed, the clamping jaw can be loosened to move it outside the end of the heat shrinkable sleeve; the sliding seat drives the clamping jaw to move so as to form a traction force on the heat shrinkable sleeve during the heat shrinkage of the curved section.

2. The heat shrink sleeve baking equipment for steel-plastic conversion elbow pipe for town gas transmission and distribution engineering according to claim 1, characterized in that: The clamping jaws include: A bidirectional cylinder, fixedly connected to the slide, having two output ends that move synchronously back to back and towards each other; The two arc-shaped claws are arranged opposite to each other and are respectively connected to the two output ends of the bidirectional cylinder.

3. The heat shrink sleeve baking equipment for steel-plastic conversion elbow pipe for town gas transmission and distribution engineering according to claim 1, characterized in that: The first driving assembly comprises: A driving seat, fixedly connected to the sliding seat; A first lead screw passes through the slide seat and is threadedly matched with the slide seat, and two ends of the first lead screw are rotatably connected to the base respectively; The first motor is connected to the base and an output end of the motor is connected to the first lead screw.

4. The heat shrink sleeve baking equipment for steel-plastic conversion elbow pipe for town gas transmission and distribution engineering according to claim 1, characterized in that: A clamping sleeve is fixedly inserted into the clamping positioning hole, a positioning head is threaded into the clamping sleeve, and the positioning head is used for abutting and positioning the first straight-through section.

5. The heat shrink sleeve baking equipment for steel-plastic conversion elbow pipe for town gas transmission and distribution engineering according to any one of claims 1 to 4, characterized in that: The frame is provided with a controller, which is electrically connected to the displacement mechanism, the baking component, and the clamping component respectively; the frame is provided with a laser generator directly above each of the clamping positioning holes, which is electrically connected to the controller and is used to emit a laser beam toward the second through section.

6. The heat shrink sleeve baking equipment for steel-plastic conversion elbow pipe for town gas transmission and distribution engineering according to claim 5, characterized in that: The baking assembly comprises: A shell connected to the output end of the displacement mechanism, and the shell is provided with the annular baking holes spaced apart from each other; At least one heat-conducting sleeve is rotatably connected to each of the annular baking holes, a plurality of heating unit tubes are spaced apart on the inner circumferential wall of each heat-conducting sleeve, and each heat-conducting sleeve is coaxially connected to a gear ring; A rotary drive member is disposed in the housing and electrically connected to the controller. An output end of the rotary drive member is connected to a driving gear, and the driving gear is meshedly connected to the gear ring.

7. The heat shrink sleeve baking equipment for steel-plastic conversion elbow pipe for town gas transmission and distribution engineering according to claim 6, characterized in that: The displacement mechanism comprises: A fixed bracket, fixedly connected to the side of the frame, the top wall and the side wall of the fixed bracket are both provided with a first guide rail, the first guide rail extends along the axial direction of the first straight-through section, and the fixed bracket is provided with a second driving assembly controlled by the controller; A movable bracket is slidably connected to each of the first guide rails and connected to the output end of the second drive assembly, the movable bracket is provided with a third drive assembly controlled by the controller, and a second guide rail extending along the axial direction of the second straight-through section, the second guide rail is slidably connected to a lifting seat, and the lifting seat is connected to the output end of the third drive assembly; A rotating power member is connected to the lifting seat and controlled by the controller, and the rotating power member has a rotating output end for connecting to the baking component.

8. The heat shrink sleeve baking equipment for steel-plastic conversion elbow pipe for town gas transmission and distribution engineering according to claim 7, characterized in that: The second driving assembly comprises: A second lead screw passes through the movable bracket along the axial direction of the first guide rail and is threadedly engaged with the movable bracket, and two ends of the second lead screw are respectively rotatably connected to the fixed bracket; The second motor is arranged on the fixed bracket and the output end of the second motor is connected to the second lead screw.

9. The heat shrink sleeve baking equipment for steel-plastic conversion elbow pipe for town gas transmission and distribution engineering according to claim 7, characterized in that: The third driving assembly comprises: A third lead screw passes through the lifting seat along the axial direction of the second guide rail and is threadedly engaged with the lifting seat, and two ends of the third lead screw are respectively rotatably connected to the movable bracket; The third motor is arranged on the moving support and the output end of the motor is connected to the third lead screw.

Images