Automatic thermal shrinkage equipment and thermal shrinkage process for hot and cold joint sleeve of heating cable

Abstract

The invention relates to the technical field of heating cable processing, in particular to heating cable cold and hot joint sleeve automatic thermal shrinkage equipment and a thermal shrinkage technology.The equipment comprises a supporting frame table and double-shaft moving sets, a conveying mechanism is arranged on the supporting frame table, and a pair of double-shaft moving sets is arranged on the portion, located on one side of the conveying mechanism, of the supporting frame table; thermal shrinkage modules are arranged on the double-shaft moving groups, and each thermal shrinkage module comprises a variable annular assembly and a hot air supply system; and a cooling mechanism is arranged on the support stand and between the two double-shaft moving groups, and is used for carrying out air cooling on the inner-layer heat-shrinkable sleeve after heat shrinkage. Through the synergistic effect of the circular ring structure formed by the variable annular assembly and the blowing nozzles evenly distributed on the inner edge of the circular ring structure, the double-shaft moving set is combined to drive the circular ring structure to accurately move in the length direction of the cable, hot air can be evenly blown to the heat-shrinkable sleeve, temperature, angle and heating time deviations caused by manual operation are avoided, and the production efficiency is improved. The uniform heating of each part of the heat-shrinkable sleeve is ensured, and the consistency and stability of the heat-shrinkable effect are obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heating cable processing, in particular to automatic heat shrinking equipment and a heat shrinking process for a heating cable hot and cold joint sleeve. Background Art

[0002] During the production of products like plastic heating cables and plastic heating cables, it's necessary to connect the power cord to the heating wire. The heating wire, which generates heat, is called the hot wire, while the power cord, which provides power, is called the cold wire. Therefore, the junction between the heating and cold wires is called the hot / cold junction. Heat shrink tubing is often used to protect the hot / cold junction.

[0003] Currently, manual heat shrinking using a handheld gun is commonly used. Operators heat and shrink the heat shrink tubing using a handheld gun. This traditional heat shrinking method has many drawbacks: First, the shrinking process relies on manual operation, and the control of shrinking temperature, angle, and heating time is significantly affected by the operator's subjective factors, making it difficult to ensure consistent shrinking results. Second, manual operation is inefficient and cannot meet the needs of large-scale production. Third, due to the unstable shrinking effect, gaps easily form at the connection between the heat shrink tubing and the cable after long-term use, allowing moisture to enter, which can cause electrical accidents such as short circuits, seriously affecting the safety and service life of the heating cable. Therefore, there is an urgent need to develop a new heat shrinking equipment and process with a high degree of automation and excellent shrinking effect. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic heat shrinking device and heat shrinking process for a hot and cold joint sleeve of a heating cable to solve the technical problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions.

[0006] A device for automatically heat shrinking hot and cold joint sleeves of heating cables comprises a support frame and a biaxial movable group, wherein the support frame is provided with a conveying mechanism, and a pair of biaxial movable groups are provided on the support frame on one side of the conveying mechanism, and each biaxial movable group is provided with a heat shrinking module, and the heat shrinking module comprises a variable annular component and a hot air supply system; a cooling mechanism is provided on the support frame between the two biaxial movable groups for air cooling the inner layer of the heat shrinkable sleeve after heat shrinkage; the variable annular component comprises an annular segment, a pair of arc-shaped swinging segments and an adjusting mechanism, arc-shaped swinging segments are hinged at both ends of the annular segment, and the adjusting mechanism is used to drive the two arc-shaped swinging segments to swing and adjust, wherein the two arc-shaped swinging segments can form a circular ring structure with the annular segment; the hot air supply system comprises a plurality of blowing nozzles, which are evenly distributed at the inner edge of the circular ring structure, and the circular ring structure is driven to extend along the length of the cable by the biaxial movable group, and the blowing nozzles can be used to evenly blow hot air to the heat shrinkable sleeve to achieve heat shrinkage treatment.

[0007] Preferably, the conveying mechanism includes a pair of shafts, a driving device, two pairs of sprockets and a pair of chains; the two shafts are rotatably installed on both sides of the support frame, and two sprockets are fixedly mounted on the two shafts; a chain is commonly mounted on the two sprockets on the same side; the driving device is provided on the support frame, and is used to drive one of the shafts to rotate; a number of clamping mechanisms are arranged at equal distances on the two chains, and the positions of the clamping mechanisms on the chains on both sides correspond one to one, and the two clamping mechanisms corresponding to the positions on both sides form a positioning station for positioning and placing cables; the spacing between the cooling mechanism and the variable annular components on both sides is equal to the setting spacing of the positioning stations.

[0008] Preferably, the dual-axis moving group includes a power guide rail and a cylinder A; the power guide rail is fixed above the support frame through a vertical frame, and the power guide rail extends along the width direction of the support frame; a suspension is fixed on the moving seat of the power guide rail, cylinder A is vertically fixed on the suspension, and a mounting platform is fixed on the telescopic end; the annular segment is fixed below the mounting platform.

[0009] Preferably, there is a notch at the bottom of the annular segment, and a rotating shaft A is installed at both ends of the annular segment for rotation. An arc-shaped connecting segment is fixedly mounted on one end of the rotating shaft A, and the two arc-shaped swinging segments are respectively fixed on the ends of the arc-shaped connecting segment on the corresponding sides; the adjustment mechanism is used to drive the two rotating shafts A to rotate synchronously in opposite directions; the curvature of the annular segment, the arc-shaped connecting segment and the arc-shaped swinging segment are all kept consistent.

[0010] Preferably, the adjustment mechanism includes a cylinder B, a rack and a driven gear; a driven gear is fixed to the other end of the rotating shaft A; the cylinder B is vertically fixed to one side of the mounting platform through a bracket, and a connecting plate is fixed on the telescopic end, and vertically extending racks are fixed at both ends of the connecting plate; the rack is meshed with the driven gear in a one-to-one correspondence.

[0011] Preferably, the hot air supply system also includes a conveying pipe; the annular section, the rotating shaft A, the arc-shaped connecting section and the arc-shaped swinging section are all hollow bodies; one end of the conveying pipe is connected to the hot air generator, and the other end is connected to the annular section; the part of the outer wall of the rotating shaft A located in the annular section is evenly distributed with a number of guide holes A for connecting the annular section and the rotating shaft A; the part of the outer wall of the rotating shaft A located in the arc-shaped connecting section is evenly distributed with a number of guide holes B for connecting the rotating shaft A and the arc-shaped connecting section; a guide hole C is commonly provided between the arc-shaped connecting section and the arc-shaped swinging section; a number of blowing nozzles are evenly distributed on the inner edge wall of the annular section, and a blowing nozzle is provided on the inner edge wall of the arc-shaped swinging section.

[0012] Preferably, the cooling mechanism includes a guide pipe, a diverter pipe and a nozzle; a stand is fixed on the support frame, and a guide pipe is installed through the stand; one end of the guide pipe is connected to the diverter pipe, and the other end is connected to the output part of the centrifugal fan; the diverter pipe extends along the width direction of the support frame, and a number of nozzles are installed at intervals below the diverter pipe, and are sufficient to cover the heat shrinkage area on the cable.

[0013] Preferably, the driving device includes a reduction motor, a bevel gear A and a bevel gear B; the reduction motor is fixed to the support frame through a motor seat, and the bevel gear A is fixed to the output shaft of the reduction motor; the bevel gear B is fixed on one of the shafts and meshes with the bevel gear A; a rotating shaft B is also rotatably installed on the support frame on the downstream side of the conveying mechanism; rollers are fixed on the shaft on which the bevel gear B is installed and on both ends of the rotating shaft B; conveyor belts are installed on the two rollers on the same side; two drop platforms are provided downstream of the support frame, and are respectively connected to the downstream ends of the two conveyor belts.

[0014] Preferably, the holding mechanism includes a U-shaped seat, a guide rod, a U-shaped frame, a clamping roller and a spring; the U-shaped seat is fixed to the corresponding segment of the chain, and the two vertical parts of the U-shaped seat are provided with horizontal sliding holes; guide rods are slidably installed in the sliding holes, and the ends of the two guide rods close to each other are fixed with U-shaped frames, and clamping rollers are rotatably installed on the U-shaped frames; the two clamping rollers on the same U-shaped seat are in conflict with each other, and the two clamping rollers roll and fit the U-shaped seat; a spring is sleeved on the guide rod, one end of the spring is fixed to the U-shaped frame, and the other end is fixed to the vertical part of the U-shaped seat.

[0015] An automatic heat shrinking process for a heating cable hot and cold joint sleeve utilizes the heat shrinking device of the present application to achieve double-layer heat shrinking treatment, specifically comprising the following steps: Step 1: Put the inner heat shrink tubing on the heating wire and the outer heat shrink tubing on the power wire. Then connect the two wires and load them onto the positioning station, ensuring that the connection is relatively centered. Step 2: Use the circular ring structure on the upstream side to push the inner heat shrink tubing to the connection point, and use the circular ring structure and the blowing nozzle to blow hot air to shrink it; Step 3: Use the cooling mechanism to air-cool the inner heat shrink tubing after heat shrinkage; Step 4: Use the circular ring structure on the downstream side to push the outer heat shrink tubing to the outside of the inner heat shrink tubing, and use the circular ring structure and the blowing nozzle to blow hot air to shrink it; Step 5: Adjust the arc-shaped swing section on the downstream side to swing inward to form a hook-shaped structure, and pull the heating wire and power cord upward respectively to separate them from the positioning station to realize unloading.

[0016] Compared with the prior art, the present invention has the following beneficial effects.

[0017] The ring structure formed by the variable ring component works in synergy with the blowing nozzles evenly distributed on its inner edge. Combined with the dual-axis moving group, the ring structure is driven to move precisely along the length of the cable. This can evenly blow hot air to the heat shrink tubing, avoiding temperature, angle, and heating time deviations caused by manual operation. This ensures that all parts of the heat shrink tubing are heated evenly, significantly improving the consistency and stability of the heat shrink effect. With the help of the conveying function of the conveying mechanism, the transmission system composed of shafts, sprockets, and chains and the positioning station formed by the clamping mechanism can realize the automatic conveying and precise positioning of cables. The dual-axis movement of the heat shrink module driven by the dual-axis moving group can reduce the manual feeding and adjustment links, greatly shorten the heat shrink processing cycle of a single group of cables, and meet the needs of large-scale production.

[0018] Using a double-layer heat-shrink process, the upstream variable ring assembly and air nozzle first shrink the inner heat-shrink tubing. After air cooling through the cooling mechanism to set the shape, the downstream variable ring assembly and air nozzle then shrink the outer heat-shrink tubing, forming a double-layer protection structure. This structure effectively fills any gaps, prevents moisture intrusion, reduces electrical accidents such as short circuits caused by failure of hot and cold joint protection, and improves the safety of the heating cable.

[0019] The downstream arc-shaped swing section is driven by the adjustment mechanism to swing inward to form a hook-shaped structure. In conjunction with the lifting and lowering movement of the dual-axis moving group, it can pull the heating wire and the power cord out of the holding mechanism respectively, realizing automatic unloading. This eliminates the need for manual intervention in the unloading process, reduces the process connection time, and further improves the continuity and automation level of the overall production process.

[0020] Between the double-layer heat shrinking, cold air is blown to the inner heat shrink tubing through the nozzle of the cooling mechanism, which can quickly reduce its temperature and shape it, preventing the downstream secondary heating of the outer heat shrink tubing during heat shrinkage, which may cause deformation of the inner heat shrink tubing. This ensures the stability of the inner heat shrink structure, thereby ensuring the overall protective performance of the double-layer heat shrinkage and extending the service life of the heating cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 The structure shown omits the schematic diagram of the supporting platform and the landing platform structure; Figure 3 Schematic diagram of the cooling mechanism structure of the present invention; Figure 4 Schematic diagram of the structure of the dual-axis moving group in the present invention; Figure 5 It is a schematic diagram of the local structure of the mounting platform in the present invention; Figure 6 for Figure 5 A schematic diagram of another perspective of the structure shown; Figure 7 This is a schematic diagram of the structure of the variable annular component in the present invention; Figure 8 for Figure 7 The schematic cross-sectional view of the local structure is shown; Figure 9 for Figure 2The structure shown omits the schematic diagram of the support frame and the components thereon; Figure 10 Schematic diagram of the driving device structure in the present invention; Figure 11 Schematic diagram of the structure of the clamping mechanism in the present invention; Figure 12 Schematic diagram of shifting the inner heat shrink tubing to the heat shrink position; Figure 13 Schematic diagram of shifting the outer heat shrink tubing to the heat shrink position; Figure 14 Schematic diagram of the interfering fit between the variable annular component and the heat shrink tubing in a circular state; Figure 15 This is a schematic diagram of the arc-shaped swinging section swinging inward to form a hook-shaped structure.

[0022] In the figure: 01, point A; 02, point B; 03, connection; 04, inner heat shrink tubing; 05, outer heat shrink tubing; 1, support frame; 2, conveying mechanism; 21, shaft; 22, drive unit; 221, motor base; 222, reduction motor; 223, bevel gear A; 224, bevel gear B; 23, sprocket; 24, chain; 3, clamping mechanism; 31, U-shaped base; 311, sliding hole; 32, guide rod; 33, U-shaped frame; 34, clamping roller; 341, clamping space; 35, spring; 4, dual-axis moving group; 41, vertical frame; 42, power guide rail; 421, moving base; 43. Cylinder A; 44. Mounting table; 5. Variable annular assembly; 501. Notch; 51. Annular segment; 52. Rotating shaft A; 521. Guide hole A; 522. Guide hole B; 53. Arc-shaped connecting segment; 531. Guide hole C; 54. Arc-shaped swinging segment; 541. Hook-shaped structure; 6. Conveying pipe; 61. Blowing nozzle; 7. Adjusting mechanism; 71. Cylinder B; 72. Connecting plate; 73. Rack; 74. Driven gear; 8. Cooling mechanism; 81. Stand; 82. Guide pipe; 83. Diverter pipe; 84. Nozzle; 9. Conveyor belt; 901. Drop table; 91. Rotating shaft B; 92. Roller. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection", and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct connection or an indirect connection through an intermediate medium. Here, "fixed" means that the two are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, 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 embodiments of the present invention.

[0025] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0026] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0027] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present invention. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. Example 1

[0028] See also Figures 1-15The present invention provides an automatic heat shrinking device for hot and cold joint sleeves of heating cables, which is used for double-layer heat shrinking processing. The device includes a support frame 1 and a double-axis moving group 4. The support frame 1 is provided with a conveying mechanism 2, which is used to position and convey the connected cables. A pair of double-axis moving groups 4 are provided on the support frame 1 on one side of the conveying mechanism 2. The double-axis moving groups 4 are both provided with heat shrinking modules. The double-axis moving groups 4 are used to drive the heat shrinking modules to perform translational adjustment in the width direction and vertical direction of the support frame 1. A cooling mechanism 8 is provided between the two double-axis moving groups 4 on the support frame 1. The cooling mechanism 8 is used to air-cool the inner layer of the heat shrinkable sleeve 04 after heat shrinkage.

[0029] Among them, Figure 2 and Figure 9 As shown, the conveying mechanism 2 includes a pair of shafts 21, a driving device 22, two pairs of sprockets 23 and a pair of chains 24 (the chains 24 are prior art, and the chains 24 in the figure are all simply expressed). The two shafts 21 are rotatably mounted on both sides of the support frame 1, and two sprockets 23 are fixedly mounted on the two shafts 21. The two sprockets 23 on the same side are jointly driven by the chain 24. The sprockets 23 and the chains 24 are used for transmission, which has an anti-slip effect and ensures that the transmission amount of the two chains 24 is synchronized.

[0030] The driving device 22 is arranged on the supporting frame 1 and is used to drive one of the shafts 21 to rotate. Several clamping mechanisms 3 are arranged at equal distances on the two chains 24. The positions of the clamping mechanisms 3 on the chains 24 on both sides correspond to each other one by one, and the two clamping mechanisms 3 corresponding to each other on both sides form a positioning station.

[0031] The heating wire is clamped on the clamping mechanism 3 on one side, and the power wire is clamped on the corresponding clamping mechanism 3 on the other side, and then the cable is positioned and placed on the positioning station. One of the shafts 21 is driven to rotate by the driving device 22, and under the transmission action of the sprocket 23 and the chain 24, the positioned cable can be transported downstream.

[0032] In addition, the spacing between the cooling mechanism 8 and the variable annular components 5 on both sides is equal to the spacing of the positioning stations, ensuring that when the conveying mechanism 2 pauses conveying, the upstream variable annular component 5, the cooling mechanism 8 and the downstream variable annular component 5 are all aligned with the corresponding positioning stations so that they can work simultaneously, ensure process accuracy and improve processing efficiency.

[0033] The heat shrink module includes a variable annular component 5 and a hot air supply system, and the two are arranged in a highly integrated manner.

[0034] The variable annular component 5 includes an annular segment 51, a pair of arc-shaped swing segments 54 and an adjustment mechanism 7, such as Figure 5-Figure 7As shown, the ring segment 51 has a notch 501 at the bottom, and a rotating shaft A52 is installed at both ends of the ring segment 51 for rotation. An arc-shaped connecting segment 53 is fixedly mounted on one end of the rotating shaft A52. The two arc-shaped swinging segments 54 are respectively fixed on the ends of the arc-shaped connecting segments 53 on the corresponding sides, realizing the hinged installation of the arc-shaped swinging segments 54 and having the ability to rotate. The adjustment mechanism 7 is used to drive the two rotating shafts A52 to rotate synchronously in opposite directions, providing drive for the swing adjustment of the arc-shaped swinging segments 54.

[0035] The curvatures of the annular segment 51, the arc-shaped connecting segment 53 and the arc-shaped swinging segment 54 are all kept consistent. During the swing adjustment process of the two arc-shaped swinging segments 54, they can form an approximately closed circular ring structure with the annular segment 51. When the circular ring structure is formed, there is a gap between the ends of the two arc-shaped swinging segments 54 to avoid interference when the arc-shaped swinging segments 54 swing.

[0036] The hot air supply system includes a delivery pipe 6 and a plurality of blowing nozzles 61. The annular segment 51, the rotating shaft A52, the arc-shaped connecting segment 53 and the arc-shaped swinging segment 54 are all hollow bodies. One end of the delivery pipe 6 is connected to the hot air generator (using the existing technology, not shown in the figure), and the other end is connected to the annular segment 51. Figure 8 As shown, a portion of the outer wall of the rotating shaft A52 located within the annular segment 51 is evenly distributed with a number of guide holes A521 for connecting the annular segment 51 and the rotating shaft A52. A portion of the outer wall of the rotating shaft A52 located within the arc-shaped connecting segment 53 is evenly distributed with a number of guide holes B522 for connecting the rotating shaft A52 and the arc-shaped connecting segment 53. A guide hole C531 is commonly provided between the arc-shaped connecting segment 53 and the arc-shaped swinging segment 54 for connecting the arc-shaped connecting segment 53 and the arc-shaped swinging segment 54. A number of blowing nozzles 61 are evenly distributed on the inner edge wall of the annular segment 51, and a blowing nozzle 61 is provided on the inner edge wall of the arc-shaped swinging segment 54.

[0037] The heat flow generated by the hot air generator is transported to the annular section 51 through the conveying pipe 6. The heat flow flows into the rotating shaft A52 through the guide hole A521, flows into the arc connecting section 53 through the guide hole B522, flows into the arc swing section 54 through the guide hole C531, and finally is ejected through the blowing nozzle 61. When the annular section 51 and the arc swing section 54 are in a circular ring structure, the hot air can be evenly blown onto the heat shrinkable sleeve, thereby improving the heating uniformity of the heat shrinkable sleeve and thus improving the quality of the heat shrinkage treatment.

[0038] In addition, the delivery pipe 6 is a flexible pipe and has bending and deformation capabilities to adapt to the position change of the annular segment 51.

[0039] During the pre-processing preparation, put the inner heat shrink tubing 04 on the heating wire, put the outer heat shrink tubing 05 on the power wire, and then connect the two wires. Then clamp the heating wire on one side of the clamping mechanism 3 and clamp the power wire on the other side of the clamping mechanism 3 to load the whole material to the positioning station and ensure that the connection 03 is relatively centered. Figure 12 and Figure 13 As shown, the point on the heating wire close to the holding mechanism 3 is defined as point A 01, the point on the power line close to the holding mechanism 3 is defined as point B 02, the inner heat shrink tubing 04 is located between point A 01 and the connection 03, and the outer heat shrink tubing 05 is located between the connection 03 and point B 02.

[0040] Steps for heat shrinking the inner heat shrink tubing 04 using the upstream heat shrink module: The adjustment mechanism 7 drives the two arc-shaped swinging segments 54 to swing inward, so that the two arc-shaped swinging segments 54 are arranged in an inverted figure-eight shape to make room for the gap 501 below the ring segment 51. The dual-axis movement group 4 drives the heat shrink module downward, allowing the cable to enter the ring segment 51 through the gap 501. Then, the adjustment mechanism 7 drives the arc-shaped swinging segments 54 to swing back to their original position, so that the two arc-shaped swinging segments 54 and the ring segment 51 form a circular ring structure. The ring structure is driven to move to point A 01 by the dual-axis moving group 4, and then the dual-axis moving group 4 drives the ring structure to move upward, such as Figure 14 As shown, the heating wire is brought close to the two arc-shaped swing sections 54 to ensure that there is a blocking and interfering portion between the circular ring structure and the end of the heat shrink tube. Then, the circular ring structure is driven to move toward the side of point B 02 by the biaxial moving group 4 until the inner heat shrink tube 04 is pushed along the heating wire to the outside of the connection 03. The hot air generator works pneumatically, and the generated heat flow is ejected from the blowing nozzle 61, and the circular structure is driven by the dual-axis moving group 4 to continue to move toward the side of point B 02 for buffering, until the inner layer heat shrinkable sleeve 04 is heated and shrunk outside the connection 03, thereby achieving inner layer protection.

[0041] Steps for heat shrinking the outer heat shrink tubing 05 using the downstream heat shrink module: After the inner heat shrink tube 04 is heat-shrunk, the cable is conveyed to the bottom of the cooling mechanism 8 by the conveying mechanism 2. The cooling mechanism 8 performs air cooling on the heat-shrunk inner heat shrink tube 04 to prevent the inner heat shrink tube 04 from being deformed due to secondary heating during the subsequent heat shrinking of the outer layer, thereby ensuring the stability of the heat shrinking effect. The conveying mechanism 2 conveys the cooled cable to the downstream heat shrink module. Similar to the above working principle, the outer heat shrinkable tube 05 is pushed to the outside of the heat-shrinkable inner heat shrinkable tube 04 using the circular structure, and the above heat shrinking process steps are repeated to complete the heat shrinking process of the outer heat shrinkable tube 05. Then, the biaxial moving group 4 drives the annular structure to move to point A 01, and the adjusting mechanism 7 drives the two arc-shaped swinging sections 54 to swing inwards, as shown in FIG. Figure 15As shown, the arc-shaped swinging section 54 and the annular section 51 form a hook structure 541, and the heating wire is clamped at the hook structure 541. The circular structure is driven upward by the biaxial moving group 4, and the heating wire can be pulled upward and disengaged from the clamping mechanism 3. At the same time, the power cord is pulled out from the clamping mechanism 3 on the other side, and the cable can be cut. Among them, the heat shrinkage at the outer heat shrinkable sleeve 05 relies on natural cooling after cutting. Example 2

[0042] See also Figure 4 and Figure 6 The difference between this embodiment and embodiment 1 is that: Specifically, the dual-axis moving group 4 includes a power guide rail 42 and a cylinder A43. The power guide rail 42 is fixed above the support frame 1 through a stand 41, and the power guide rail 42 extends along the width direction of the support frame 1. A suspension is fixed on the moving seat 421 of the power guide rail 42. The cylinder A43 is vertically fixed on the suspension, and a mounting platform 44 is fixed on the telescopic end. The annular segment 51 is fixed below the mounting platform 44. When the power guide rail 42 is working, it can drive the moving seat 421 to translate along the width direction of the support frame 1, providing drive for the translation adjustment of the heat shrink module. When the cylinder A43 is vertically extended and retracted, the mounting platform 44 fixed at its telescopic end moves up and down accordingly, providing stable drive for the lifting and lowering adjustment of the heat shrink module.

[0043] Through the coordinated action of the power guide rail 42 and the cylinder A43, the position of the annular segment 51 and its corresponding heat shrink module in the width direction and vertical direction of the support frame 1 is adjusted to meet the position requirements of operations such as the cable entering the range of the annular segment 51 and pushing the heat shrink sleeve.

[0044] The adjusting mechanism 7 includes a cylinder B71, a rack 73 and a driven gear 74. A driven gear 74 is fixed to the other end of the rotating shaft A52. The cylinder B71 is vertically fixed to one side of the mounting platform 44 through a bracket, and a connecting plate 72 is fixed on the telescopic end. Vertically extending racks 73 are fixed at both ends of the connecting plate 72. The racks 73 are meshed with the driven gear 74 in a one-to-one correspondence. The telescopic operation of the cylinder B71 can drive the connecting plate 72 to move up and down, thereby driving the rack 73 to move up and down synchronously. The moving rack 73 engages and drives the driven gear 74 to rotate, thereby driving the rotating shaft A52 to rotate. The adjusting mechanism 7 drives the two rotating shafts A52 to rotate synchronously in opposite directions. The racks 73 at both ends of the connecting plate 72 are set to opposite tooth directions, so that the two driven gears 74 drive the two rotating shafts A52 to rotate in opposite directions, and finally realize the synchronous opposite swing of the arc-shaped connecting section 53 and the arc-shaped swing section 54 fixed on the rotating shaft A52.

[0045] The dual-axis moving group 4 realizes position adjustment and cooperates with the adjustment mechanism 7 to drive the variable annular component 5 for shape adjustment, providing the heat shrink module with precise spatial positioning and shape switching capabilities, ensuring the stable progress of processes such as pushing the heat shrink sleeve, uniform heating, and dragging and unloading. Example 3

[0046] See also Figure 3 The difference between this embodiment and embodiment 2 is that: Specifically, the cooling mechanism 8 includes a guide pipe 82, a diverter pipe 83 and a nozzle 84. A stand 81 is fixed on the support frame 1, and a guide pipe 82 is installed through the stand 81. One end of the guide pipe 82 is connected to the diverter pipe 83, and the other end is connected to the output part of the centrifugal fan (using existing technology, not shown in the figure). The diverter pipe 83 extends along the width direction of the support frame 1, and a number of nozzles 84 are installed at intervals below the diverter pipe 83, which are sufficient to cover the heat shrinkage area on the cable.

[0047] When conveying mechanism 2 delivers the inner-layer heat-shrinkable cable to the bottom of cooling mechanism 8, nozzle 84 can precisely align with the heat-shrinking area of ​​the inner heat-shrinkable tubing 04 on the cable. Air is supplied by the centrifugal fan, flowing through guide tube 82 into diverter tube 83 before being evenly ejected from nozzle 84 and applied to the heat-shrinked inner heat-shrinkable tubing 04. The air-cooling process rapidly reduces the temperature of the inner heat-shrinkable tubing 04, preventing it from deforming due to secondary heating when the downstream variable annular assembly 5 subsequently heat-shrinks the outer heat-shrinkable tubing 05. This ensures the stability of the inner heat-shrinkable structure, provides a qualified foundation for the outer heat-shrinking process, and ultimately improves the overall double-layer heat-shrinking quality. Example 4

[0048] See also Figure 2 、 Figure 9 and Figure 10 The difference between this embodiment and embodiment 3 is that: Specifically, the driving device 22 includes a reduction motor 222, a bevel gear A223 and a bevel gear B224. The reduction motor 222 is fixed on the support frame 1 through the motor seat 221. The bevel gear A223 is fixed on the output shaft of the reduction motor 222. The bevel gear B224 is fixed on one of the shafts 21 and meshes with the bevel gear A223. The reduction motor 222 drives the bevel gear A223 to rotate. The rotating bevel gear A223 meshes and drives the bevel gear B224 and drives one side of the shaft 21 to rotate, thereby providing stable drive for the operation of the chain 24.

[0049] In addition, a rotating shaft B91 is rotatably installed on the support frame 1 on the downstream side of the conveying mechanism 2, on which the shaft 21 with the bevel gear B224 is installed, and rollers 92 are fixed on both ends of the rotating shaft B91. The two rollers 92 on the same side are both equipped with conveyor belts 9. Two drop platforms 901 are provided downstream of the support frame 1, and are respectively connected to the downstream ends of the two conveyor belts 9.

[0050] When the shaft 21 rotates, the conveyor belt 9 is driven to move synchronously through the roller 92. The conveyor belt 9 on one side is used to support the heating wire coil, and the conveyor belt 9 on the other side is used to support the power cord coil. The conveyor belt 9 and the chain 24 share a shaft 21, so that the two conveyor belts 9 can move synchronously with the chain 24, and thus ensure that the two conveyor belts 9 can synchronously support and transport the heating wire coil and the power cord coil during the heat shrink process, and after unloading is completed, the heating wire coil and the power cord coil can slide smoothly onto the landing platform 901. Example 5

[0051] See also Figure 11 The difference between this embodiment and embodiment 4 is that: Specifically, the holding mechanism 3 includes a U-shaped seat 31, a guide rod 32, a U-shaped frame 33, a card roller 34 and a spring 35. The U-shaped seat 31 is fixed to the segment of the chain 24 accordingly. A horizontal sliding hole 311 is provided on the two vertical parts of the U-shaped seat 31. A guide rod 32 is slidably installed in the sliding hole 311. The U-shaped frame 33 is fixed on the ends of the two guide rods 32 close to each other. The card roller 34 is rotatably installed on the U-shaped frame 33. The two card rollers 34 on the same U-shaped seat 31 are in conflict with each other, and the two card rollers 34 roll and fit the U-shaped seat 31. As shown in the figure, a holding space 341 is formed between the two card rollers 34 and the U-shaped seat 31. A spring 35 is sleeved on the guide rod 32. One end of the spring 35 is fixed to the U-shaped frame 33, and the other end is fixed to the vertical part of the U-shaped seat 31.

[0052] When the cable is placed in the positioning positions formed by the corresponding clamping mechanisms 3 on both sides, the cable will squeeze the two clamping rollers 34, forcing the clamping rollers 34 to drive the U-shaped frame 33 and the guide rod 32 to slide outward along the slide hole 311. The spring 35 is compressed and generates a reverse elastic force until the cable enters the clamping space 341. The spring 35 pushes the guide rod 32 to slide back to its original position, and the two clamping rollers 34 resist each other to prevent the cable from detaching. Similarly, when the cable is pulled upward, the two clamping rollers 34 are pressed away from each other to facilitate the cable to detach.

[0053] In addition, when the cable is disengaged when the chain 24 is reversed, since the card roller 34 has the ability to rotate, the card roller 34 acts on the cable through rolling friction, ensuring that the cable disengagement process is smoother. Example 6

[0054] This embodiment provides an automatic heat shrinking process for the hot and cold joint sleeves of heating cables, which uses the heat shrinking equipment in this application to achieve double-layer heat shrinking treatment, specifically including the following steps: Step 1: Put the inner heat shrink tubing 04 on the heating wire and the outer heat shrink tubing 05 on the power wire. Then connect the two wires and load them onto the positioning station, ensuring that the connection 03 is relatively centered. Step 2: Use the circular ring structure on the upstream side to push the inner heat shrink tubing 04 to the connection 03, and use the circular ring structure and the blowing nozzle 61 to perform hot air heat shrinking treatment; Step 3: Use the cooling mechanism 8 to air-cool the inner heat shrinkable tube 04 after heat shrinkage; Step 4: Use the circular ring structure on the downstream side to push the outer heat shrinkable tube 05 to the outside of the inner heat shrinkable tube 04, and use the circular ring structure and the blowing nozzle 61 to blow hot air to heat shrink the tube; Step 5: Adjust the arc-shaped swing section 54 on the downstream side to swing inward to form a hook-shaped structure 541, and pull the heating wire and the power wire upward respectively to separate them from the positioning station to realize unloading.

[0055] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field, so the present invention will no longer explain the control method and circuit connection in detail.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. An automatic heat shrink device for hot and cold joint sleeves of heating cables, comprising a support frame (1) and a biaxial moving group (4), characterized in that: The support frame (1) is provided with a conveying mechanism (2), and the support frame (1) is provided with a pair of double-axis moving groups (4) on one side of the conveying mechanism (2), and the double-axis moving groups (4) are both provided with heat shrink modules, and the heat shrink modules include a variable annular component (5) and a hot air supply system; A cooling mechanism (8) is provided on the support frame (1) between the two biaxial moving groups (4) for air cooling the inner heat shrinkable sleeve (04) after heat shrinkage; The variable annular component (5) comprises an annular segment (51), a pair of arc-shaped swinging segments (54) and an adjusting mechanism (7), wherein the annular segment (51) is hingedly connected to the arc-shaped swinging segments (54) at both ends, and the adjusting mechanism (7) is used to drive the two arc-shaped swinging segments (54) to swing and adjust, wherein the two arc-shaped swinging segments (54) can form a circular ring structure with the annular segment (51); The hot air supply system includes a plurality of blowing nozzles (61), which are evenly distributed at the inner edge of the circular ring structure. The circular ring structure is driven to extend along the length of the cable by a biaxial moving group (4). The blowing nozzles (61) can evenly blow hot air toward the heat shrink tubing to achieve heat shrinkage treatment.

2. The automatic heat shrink device for hot and cold joints of heating cables according to claim 1, characterized in that: The conveying mechanism (2) comprises a pair of shafts (21), a driving device (22), two pairs of sprockets (23) and a pair of chains (24); The two shafts (21) are rotatably mounted on both sides of the support frame (1), and the two shafts (21) are fixedly sleeved with two sprockets (23); The two sprockets (23) on the same side are provided with a common transmission sleeve having the chain (24); The driving device (22) is provided on the supporting frame (1) and is used to drive one of the shafts (21) to rotate; A plurality of clamping mechanisms (3) are arranged at equal intervals on the two chains (24), and the positions of the clamping mechanisms (3) on the two chains (24) correspond to each other. The two clamping mechanisms (3) at the corresponding positions on the two sides form a positioning station for positioning and placing cables; The spacing between the cooling mechanism (8) and the variable annular components (5) on both sides is equal to the spacing of the positioning stations.

3. The automatic heat shrink device for hot and cold joints of heating cables according to claim 1, characterized in that: The biaxial moving group (4) includes a power guide rail (42) and a cylinder A (43); The power guide rail (42) is fixed above the support frame (1) through the stand (41), and the power guide rail (42) extends along the width direction of the support frame (1); A suspension is fixed on the movable seat (421) of the power guide rail (42), the cylinder A (43) is vertically fixed on the suspension, and a mounting platform (44) is fixed on the telescopic end; The annular segment (51) is fixed below the mounting platform (44).

4. The automatic heat shrink device for hot and cold joints of heating cables according to claim 3, characterized in that: The bottom of the annular segment (51) has a notch (501), and a rotating shaft A (52) is rotatably installed at both ends of the annular segment (51). An arc-shaped connecting segment (53) is fixedly mounted on one end of the rotating shaft A (52), and the two arc-shaped swinging segments (54) are respectively fixed on the ends of the arc-shaped connecting segment (53) on the corresponding sides. The regulating mechanism (7) is used to drive the two rotating shafts A (52) to rotate synchronously in opposite directions; The curvatures of the annular segment (51), the arc-shaped connecting segment (53), and the arc-shaped swing segment (54) are all consistent.

5. The automatic heat shrink device for hot and cold joint sleeves of heating cables according to claim 4, characterized in that: The regulating mechanism (7) includes a cylinder B (71), a rack (73) and a driven gear (74); The driven gear (74) is fixed to the other end of the rotating shaft A (52); The cylinder B (71) is vertically fixed to one side of the mounting platform (44) through a bracket, and a connecting plate (72) is fixed on the telescopic end, and vertically extending racks (73) are fixed at both ends of the connecting plate (72); The rack (73) is meshed with the driven gear (74) in a one-to-one correspondence.

6. The automatic heat shrink device for hot and cold joint sleeves of heating cables according to claim 5, characterized in that: The hot air supply system also includes a delivery pipe (6); The annular segment (51), the rotating shaft A (52), the arc-shaped connecting segment (53) and the arc-shaped swing segment (54) are all hollow bodies; One end of the delivery pipe (6) is connected to the hot air generator, and the other end is connected to the annular section (51); A portion of the outer wall of the rotating shaft A (52) located within the annular section (51) is uniformly distributed with a plurality of guide holes A (521) for connecting the annular section (51) and the rotating shaft A (52); A portion of the outer wall of the rotating shaft A (52) located within the arc-shaped connecting section (53) is uniformly distributed with a plurality of guide holes B (522) for connecting the rotating shaft A (52) and the arc-shaped connecting section (53); A guide hole C (531) is provided between the arc-shaped connecting section (53) and the arc-shaped swinging section (54); A plurality of air blowing nozzles (61) are evenly distributed on the inner edge wall of the annular section (51), and an air blowing nozzle (61) is also provided on the inner edge wall of the arc-shaped swinging section (54).

7. The automatic heat shrink device for hot and cold joints of heating cables according to claim 1, characterized in that: The cooling mechanism (8) includes a flow guide pipe (82), a diverter pipe (83) and a nozzle (84); A stand (81) is fixed on the support frame (1), and a flow guide pipe (82) is installed through the stand (81); One end of the guide pipe (82) is connected to a diversion pipe (83), and the other end is connected to the output part of the centrifugal fan; The diverter pipe (83) extends along the width direction of the support frame (1), and a plurality of nozzles (84) are installed at intervals below the diverter pipe (83) and are sufficient to cover the heat shrinkage area on the cable.

8. The automatic heat shrink device for hot and cold joint sleeves of heating cables according to claim 2, characterized in that: The driving device (22) includes a reduction motor (222), a bevel gear A (223), and a bevel gear B (224); The reduction motor (222) is fixed on the support frame (1) via the motor base (221), and the bevel gear A (223) is fixed on the output shaft of the reduction motor (222); The bevel gear B (224) is fixed on one of the shafts (21) and meshes with the bevel gear A (223); A rotating shaft B (91) is also rotatably mounted on the support frame (1) at the downstream side of the conveying mechanism (2); Rollers (92) are fixed to both ends of the shaft (21) on which the bevel gear B (224) is mounted and the rotating shaft B (91); The two rollers (92) on the same side are both provided with a conveyor belt (9); Two drop platforms (901) are provided downstream of the support frame (1) and are respectively connected to the downstream ends of the two conveyor belts (9).

9. The automatic heat shrink device for hot and cold joint sleeves of heating cables according to claim 2, characterized in that: The clamping mechanism (3) comprises a U-shaped seat (31), a guide rod (32), a U-shaped frame (33), a clamping roller (34) and a spring (35); The U-shaped seat (31) is fixed to the segment of the chain (24) accordingly, and both vertical parts of the U-shaped seat (31) are provided with a horizontally penetrating sliding hole (311); Guide rods (32) are slidably installed in the sliding holes (311), U-shaped frames (33) are fixed on the ends of the two guide rods (32) that are close to each other, and clamping rollers (34) are rotatably installed on the U-shaped frames (33); The two clamping rollers (34) on the same U-shaped seat (31) are in contact with each other, and both clamping rollers (34) roll and fit the U-shaped seat (31); The guide rods (32) are each sleeved with a spring (35), one end of the spring (35) is fixed to the U-shaped frame (33), and the other end is fixed to the vertical portion of the U-shaped seat (31).

10. An automatic heat shrinking process for hot and cold joint sleeves of heating cables, based on the automatic heat shrinking device for hot and cold joint sleeves of heating cables according to any one of claims 1 to 9, characterized in that: The double-layer heat shrink structure is adopted, which specifically includes the following steps: Step 1: Put the inner heat shrink tubing (04) on the heating wire and the outer heat shrink tubing (05) on the power wire, then connect the two wires and load them onto the positioning station, ensuring that the connection (03) is relatively centered; Step 2: Using the circular ring structure on the upstream side to push the inner heat shrink tubing (04) to the connection (03), and using the circular ring structure and the blowing nozzle (61) to perform hot air shrinkage treatment; Step 3: using the cooling mechanism (8) to cool the inner heat shrinkable tube (04) after heat shrinkage; Step 4: Using the circular ring structure on the downstream side to push the outer heat shrinkable tube (05) to the outside of the inner heat shrinkable tube (04), and using the circular ring structure and the blowing nozzle (61) to perform hot air shrinkage treatment; Step 5: Adjust the arc-shaped swing section (54) on the downstream side to swing inward to form a hook-shaped structure (541), and pull the heating wire and the power wire upward respectively to separate from the positioning station to realize unloading.

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