Cable welding head heating and fixing device
By designing a heating solidification device for 10kV cable fusion joints, real-time monitoring and temperature control, the problems of eccentricity and vulcanization of the weld joints are solved, and the safety and aesthetics of the cable are improved.
Patent Information
- Application Number
- CN202421224221.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The existing 10kV cable fusion joints are prone to eccentricity during the welding process, and there may be bubbles after vulcanization, resulting in cable failure and customer power outages.
Design a heating and solidification device for cable fusion joints, including a shell, a temperature measuring unit and a display screen. The shell is fixed at the outer shielding layer of the cable fusion joints. The temperature measuring unit monitors the temperature of the fusion joints in real time and controls the temperature through the display screen. Ensure regular shape and aesthetics of the insulating vulcanized layer.
Through real-time monitoring and temperature control, the problems of eccentricity of the weld joint and bubbles after vulcanization are avoided, the safety and aesthetics of the cable are improved, and the later polishing steps and times are reduced.
Smart Images
Figure CN222441070U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cables, in particular to a heating and solidifying device for a cable fusion joint. Background Art
[0002] The rapid development of my country's economy has made the demand for electricity increasingly obvious. Many cities and enterprises with high electricity demand have adopted 10kV power cables for power distribution in the application of power supply systems, and gradually moved towards cableization. Cable fusion joint (fusion-type cable intermediate joint): Through a new fusion technology, the cable core wire is fused, the inner semiconductor layer and the main insulation layer are restored, and the cable sheath is restored to restore the cable to its original appearance. The advantage of this technology is that the cable gradually restores each layer of structure by using fusion technology, so that the restored cable structure has a firm connection, high conductivity at the connection, small radial electric field loss, small power loss, high current carrying capacity, and the cable can be bent without worrying about the impact of cable dragging. The cable body structure is completely restored to achieve a complete sealing effect and enhance the waterproof and insulation properties.
[0003] Although the main body of the cable is manufactured by the manufacturer, the intermediate joint accessories must be manufactured and installed at the construction site. However, the production of 10kV cable intermediate joints is a relatively complex process, which has strict requirements on the construction environment and process quality. It is often caused by some irregular construction habits of the constructors, poor production process quality, and quality problems at the construction site, which lead to cable failures during operation, causing power outages for customers, hindering the safe operation of the cable, and causing serious economic losses and adverse social impacts. Therefore, it is very important to strengthen the quality control of the production process of the cable intermediate joint. The commonly used heating method in the market is heating belt heating, which is not easy to control the temperature. During the heating process, the vulcanized shrink tube continues to sink due to gravity; because the heating belt is a winding heating, the appearance formed is not beautiful, and secondary processing is required, which wastes time and energy; among them, the mechanical properties, such as impact strength, tensile strength, and elongation at break, are affected to varying degrees. During the use of the heating belt, great attention is paid to environmental factors, and the installation site is very demanding. It is easy to ignore the heat lost during the heating process, and set a fixed temperature but it is inaccurate; and someone needs to be guarded during the heating process, and the hidden dangers caused by the shedding or aging of the heating belt need to be considered.
[0004] At present, the common defects in the manufacturing process of 10kV cable fusion joints are as follows: the heating time, fusion time and cooling time are not followed; the fusion temperature (too high or too low) is not followed, resulting in problems such as eccentric fusion joints and bubbles after vulcanization. Utility Model Content
[0005] Purpose of the utility model: The purpose of the utility model is to provide a cable fusion joint heating and curing device to address the shortcomings of the prior art, such as eccentricity of the fusion joint caused by the fusion process and bubbles after vulcanization. The curing device described in the utility model can monitor the fusion temperature of the fusion joint in real time, cure the fusion joint and prevent bubbles from appearing after the fusion joint is vulcanized.
[0006] The technical solution for realizing the utility model is:
[0007] The utility model discloses a cable fusion joint heating and solidifying device, comprising a shell, a plurality of temperature measuring units and a display screen; the shell is fixed to the outer shielding layer of the cable fusion joint, the outermost layer of the cable fusion joint is wrapped with an insulating vulcanized belt, and the shell is coated on the outer surface of the insulating vulcanized belt; the temperature measuring unit is arranged inside the shell; the display screen is connected to the temperature measuring unit, and the display screen displays the temperature of the temperature measuring unit to monitor the temperature of the cable fusion joint.
[0008] A further preferred technical solution of the utility model is that the shell includes two groups of molds, the two groups of molds are spliced to form a hollow curved column structure with a bulge in the middle, and the two groups of molds are fixedly connected by bolts.
[0009] Preferably, the part of the cable to be welded is provided with an inner protective layer, a copper shielding layer, an outer shielding layer, a cable cone, an inner shielding layer and a cable core in sequence from the outer layer to the inner layer; and the outer shell is fixed on the outer shielding layer.
[0010] Preferably, a layer of semi-conductive cloth is wrapped around the welding connection of the cable core, and the semi-conductive cloth is wrapped around the inner shielding layer fractures connecting the two ends of the cable fusion joint and butted with the inner shielding layer. The cable core of the utility model is restored to the connection of the core by welding.
[0011] Preferably, the outer surface of the semi-conductive cloth is wrapped with five layers of semi-conductive tape, and the semi-conductive tape is overlapped on the inner shielding layer, and the overlap length is 10mm. The semi-conductive tape cannot be overlapped on the cable cone. This structure uses semi-conductive cloth and semi-conductive tape to restore the inner shielding layer of the welded section; the semi-conductive cloth and semi-conductive tape have good conductivity and shielding effect, and also have good anti-friction performance; the semi-conductive cloth and semi-conductive tape and the inner shielding layer formed by them have good metal bonding and conductivity, good processability, soft texture, no burrs when cut, anti-fingerprint and anti-oxidation treatment.
[0012] Preferably, the semi-conductive tape is a cross-linked polyethylene semi-conductive tape, the outer surface of the semi-conductive tape is wrapped with an insulating vulcanized tape, and the outer surface of the insulating vulcanized tape is covered with the shell. The shell of the utility model is directly fixed at the cable fusion joint and does not need to be removed. When wrapping the insulating vulcanized tape, the insulating vulcanized tape needs to be stretched 1.2 times, and the semi-conductive cloth and the semi-conductive tape on the cable fusion joint form the inner shielding layer. The semi-conductive cloth and the semi-conductive tape are formed at the ends of the insulated cable cones at both ends, and the insulating vulcanized tape is tightened during wrapping. This wrapping method reduces the probability of bubbles appearing in the insulating vulcanized tape at a later stage.
[0013] Preferably, the outer side of the inner protective layer further includes a steel armor and an outer sheath in sequence; the dimensions of the two ends of the curved column structure match the dimensions of the outer shielding layer. Such a structural design ensures that the insulating vulcanized belt in the shell forms a more regular shape, improving the aesthetics of the insulating vulcanized layer.
[0014] The fixing device of the utility model fixes the shape of the cable fusion joint by arranging an outer shell, fixes the insulating vulcanized layer of the fixing device, solves the problem of serious eccentricity of the cable fusion joint due to sagging caused by gravity during the later heating process, makes the shape of the cable fusion joint regular, and reduces the steps and times of later grinding; and by arranging a temperature measuring unit inside the outer shell, the temperature of the cable fusion joint is monitored in real time and the temperature can be controlled in time, thereby improving the aesthetics of the insulating vulcanized layer, leaving only the opening and closing seam of the outer shell, improving the problem of bubbles inside the cable fusion joint after vulcanization, and having the advantages of low environmental requirements and good temperature control.
[0015] By adopting the above technical solution, the utility model has the following beneficial effects:
[0016] (1) The fixing device of the utility model is directly fixed to the outer shielding layer of the cable to fix the shape of the insulating vulcanized layer arranged inside the fixing device, thereby preventing the cable fusion joint from being eccentric, improving the aesthetics of the insulating vulcanized layer, and leaving only the opening and closing seams, so that the shape of the cable fusion joint is regular, reducing the number of subsequent polishing steps and times.
[0017] (2) The solid device of the utility model is provided with a temperature measuring unit inside the shell, and the temperature measuring unit is connected to an external display screen to monitor the temperature of the cable fusion joint in real time and realize instant temperature control according to the indication displayed on the display screen, thereby improving the problem of bubbles inside the cable fusion joint after vulcanization, and has the advantages of low environmental requirements and good temperature control. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to make the content of the utility model easier to understand, the utility model is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein:
[0019] Figure 1 It is a schematic diagram of the overall installation of the solid type device of the utility model;
[0020] Figure 2 It is a cross-sectional view of the fixing device of the utility model;
[0021] Figure 3 It is a structural schematic diagram of a quarter of the solid-state device of the utility model cut longitudinally;
[0022] Figure 4 This is a schematic diagram of the structure of the cable to be welded according to the utility model;
[0023] Figure 5 This is a schematic diagram of the structure of the cable welding part of the utility model;
[0024] Figure 6 This is a schematic diagram of the structure of the semi-conductive cloth and the semi-conductive tape of the utility model;
[0025] Figure 7 It is a schematic structural diagram of the insulating vulcanized belt of the utility model.
[0026] In the figure, 1-housing, 2-temperature measuring unit, 3-bolt, 4-outer shielding layer, 5-cable cone, 6-inner shielding layer, 7-cable core, 71-welding point, 72-semi-conductive cloth, 73-semi-conductive tape, 74-insulating vulcanized tape, 8-copper shielding layer, 9-inner sheath, 10-steel armor, 11-outer sheath. DETAILED DESCRIPTION
[0027] The technical solution of the utility model is described in detail below with reference to the accompanying drawings, but the protection scope of the utility model is not limited to the embodiments.
[0028] Embodiment: A cable fusion joint heating and solidification device, as shown in the attached Figure 1 , 2 As shown in FIG. 3 , the solid device in this embodiment includes a housing, a plurality of temperature measuring units 2 and a display screen; the housing includes two sets of molds, which are spliced to form a hollow curved column structure with a bulge in the middle, and the two sets of molds are fixedly connected by bolts 3; the housing is fixed to the outer shielding layer 4 of the cable fusion joint, and the outermost layer of the cable fusion joint is wrapped with an insulating vulcanized belt 74, and the housing is coated on the outer surface of the insulating vulcanized belt 74. The dimensions of the two ends of the curved column structure match the dimensions of the outer shielding layer 4. Such a structural design ensures that the insulating vulcanized belt 74 in the housing forms a more regular shape, improving the aesthetics of the insulating vulcanized layer.
[0029] As attached Figure 4As shown, the part to be welded of the cable in this embodiment is provided with an outer sheath 11, a steel armor 10, an inner protective layer 9, a copper shielding layer 8, an outer shielding layer 4, a cable cone 5, an inner shielding layer 6 and a cable core 7 in sequence from the outer layer to the inner layer; the various layer components of the cable in this embodiment are staggered in sequence, and the fixed device in this embodiment is fixed on the outer shielding layer 4.
[0030] As attached Figure 5 , 6 As shown in Figures 7 and 8, the cable to be fused in this embodiment first welds the cable cores 7 at both ends of the cable, and the cable core 7 in this embodiment is welded to restore the connection of the core; after the welding material is fully burned, a welding point 71 is formed, the surface of the welding point 71 is polished to be bright and smooth, the surface of the cable core 7 is cleaned with alcohol paper, and after being blown dry with a hot air blower, the semi-conductive cloth 72 is wrapped; a layer of semi-conductive cloth 72 is wrapped around the welding connection of the cable core 7, and the semi-conductive cloth 72 is wrapped around the inner shielding layer 6 fracture at both ends of the cable fusion joint, and is butted with the inner shielding layer 6; five layers of semi-conductive tape 73 are wrapped around the outer surface of the semi-conductive cloth 72, and the semi-conductive tape 73 is overlapped with the inner shielding layer 6; It is connected to the inner shielding layer 6 with an overlap length of 10 mm, and the semi-conductive tape 73 cannot be overlapped on the cable cone 5. This structure uses the semi-conductive cloth 72 and the semi-conductive tape 73 to restore the inner shielding layer of the welded section. When restoring the inner shielding layer, the semi-conductive tape 73 cannot be excessively overlapped on the insulated cable cone 5. The semi-conductive cloth 72 and the semi-conductive tape 73 have good conductivity and shielding effect, and also have good anti-friction performance. The semi-conductive cloth 72 and the semi-conductive tape 73 and the inner shielding layer 6 formed by them have good metal bonding force and conductivity, good processability, soft texture, no burrs when cutting, anti-fingerprint dirt and anti-oxidation treatment.
[0031] The semi-conductive tape 73 in this embodiment is a cross-linked polyethylene semi-conductive tape 73, and the outer surface of the semi-conductive tape 73 is wrapped with an insulating vulcanized tape 74, and the outer surface of the insulating vulcanized tape 74 is covered with an outer shell. The outer shell of this embodiment is directly fixed at the cable fusion joint and does not need to be removed. When wrapping the insulating vulcanized tape 74 in this embodiment, the insulating vulcanized tape 74 needs to be stretched 1.2 times, and the insulating vulcanized tape 74 is wrapped back and forth in a semi-lap manner from the center of the inner shielding layer 6 formed by the semi-conductive cloth 72 and the semi-conductive tape 73 on the cable fusion joint to the ends of the insulated cable cones 5 at both ends, and the insulating vulcanized tape 74 is tightened during wrapping. This wrapping method reduces the probability of bubbles appearing in the insulating vulcanized tape 74 at a later stage.
[0032] As attached Figure 2 and 3As shown, the temperature measuring unit 2 in this embodiment is evenly arranged inside the housing; the display screen is connected to the temperature measuring unit 2, and the display screen displays the temperature of the temperature measuring unit 2 to monitor the temperature of the cable fusion joint. This embodiment monitors the temperature of the cable fusion joint in real time through the temperature indication on the display screen, and can control the temperature in time according to the real-time change of the temperature, and has a good temperature control effect.
[0033] The solid-forming device of the present embodiment fixes the shape of the cable fusion joint by setting an outer shell, and fixes the insulating vulcanized layer of the solid-forming device, thereby solving the problem of serious eccentricity of the cable fusion joint due to sagging caused by gravity during the later heating process, making the shape of the cable fusion joint regular and reducing the number of later polishing steps and times; and by setting a temperature measuring unit 2 inside the outer shell, the temperature of the cable fusion joint is monitored in real time and the temperature can be controlled in time, thereby improving the aesthetics of the insulating vulcanized layer and leaving only the opening and closing seam of the outer shell; the solid-forming device in the present embodiment improves the problem of bubbles in the cable fusion joint after vulcanization, and has the advantages of low environmental requirements and good temperature control.
[0034] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A cable fusion joint heating and solidification device, characterized in that: It comprises a shell, a plurality of temperature measuring units and a display screen; the shell is fixed to the outer shielding layer of the cable fusion joint, the outermost layer of the cable fusion joint is wrapped with an insulating vulcanized belt, and the shell is coated on the outer surface of the insulating vulcanized belt; the temperature measuring unit is arranged inside the shell; the display screen is connected to the temperature measuring unit, and the display screen displays the temperature of the temperature measuring unit to monitor the temperature of the cable fusion joint.
2. The solid-state device according to claim 1, characterized in that: The shell comprises two groups of moulds, the two groups of moulds are spliced to form a hollow curved column structure with a bulge in the middle, and the two groups of moulds are fixedly connected by bolts.
3. The solid-state device according to claim 2, characterized in that: The cable to be welded is provided with an inner protective layer, a copper shielding layer, an outer shielding layer, a cable cone, an inner shielding layer and a cable core in sequence from the outer layer to the inner layer; the outer shell is fixed on the outer shielding layer.
4. The solid-state device according to claim 3, characterized in that: A layer of semi-conductive cloth is wrapped around the welding connection of the cable core, and the semi-conductive cloth is wrapped around the inner shielding layer fractures connected to the two ends of the cable fusion joint and butted against the inner shielding layer.
5. The solid-state device according to claim 4, characterized in that: The outer surface of the semi-conductive cloth is wrapped with five layers of semi-conductive tapes, and the semi-conductive tapes are overlapped on the inner shielding layer, and the overlap length is 10 mm.
6. The solid-state device according to claim 5, characterized in that: The semi-conductive belt is a cross-linked polyethylene semi-conductive belt, the outer surface of which is wrapped with an insulating vulcanized belt, and the outer surface of which is covered with the shell.
7. The solid-state device according to claim 3, characterized in that: The outer side of the inner protective layer also includes a steel armor and an outer sheath in sequence; the dimensions of the two ends of the curved column structure match the dimensions of the outer shielding layer.