Cable terminal heating device and method

Abstract

The invention discloses a cable terminal heating device and method. The device comprises a pipe body, a heating belt, an operating handle, a temperature control mechanism and a switch, the pipe body is vertically connected with the operating handle; the pipe body comprises a heat preservation pipe, an insulation heat insulation layer and a protection sleeve which are sequentially arranged from inside to outside. The heating belt comprises a resistance wire and an insulating heat conduction layer wrapping the resistance wire, and the heating belt is spirally distributed on the inner wall of the heat preservation pipe. The switch is connected with the heating belt and can control starting and stopping of the heating belt. The temperature control mechanism is arranged on the operating handle and comprises a temperature sensor and a temperature controller which are connected; the temperature sensor is connected with the heating tape and can monitor the temperature of the heating tape in real time; the temperature controller can obtain a temperature monitoring result of the temperature sensor, and controls the heating belt to stop heating when judging that the temperature of the heating belt exceeds a temperature threshold value; according to the device, the insulating layer and the protective layer of the cable can be conveniently cut, and the manufacturing difficulty of the cable terminal head at low temperature is greatly reduced.

Description

Technical Field

[0001] The invention relates to the field of cable head manufacturing, and in particular to a cable terminal head heating device and method. Background Art

[0002] Power cable is the main line of the power system, used to transmit and distribute electric energy and realize electromagnetic energy conversion. Wires and cables in a broad sense are also referred to as cables. Cables in a narrow sense refer to insulated cables. Power cables are mainly composed of four parts: core, insulation layer, protective layer and shielding layer. The core is the conductive part of the power cable, which is the path for conducting current and used to transmit electric energy. Common core materials are copper or aluminum. The insulation layer is to electrically isolate the core from the earth and the cores of different phases from each other to ensure the transmission of electric energy. It is an indispensable part of the power cable structure. Commonly used insulating materials include: rubber, polyvinyl chloride, polyethylene, etc. The protective layer is also called the sheath, which is used to protect the cable core and insulation layer, avoid the intrusion of external impurities and moisture, and prevent external forces from directly damaging the power cable. It is generally composed of a metal sheath (iron armor) and an insulation layer. Power cables of 15 kV and above generally have a conductor shielding layer and an insulation shielding layer.

[0003] The outer protective layer of power cables is generally made of ordinary plastic (PVC) or rubber. When the cable is in an environment below zero degrees, the power cable will become hard, and the entire power cable body will become hard and brittle, causing the outer skin to fall off and be damaged under slight external force. In winter, especially in northern regions, the outdoor temperature is below zero and the surface temperature is even lower. When making cable heads, the protective layer and the insulating layer are difficult to break with an electrician's knife. Strong cutting can easily damage the cable core, causing the cable insulation layer to crack and damage as a whole, causing damage to the cable, and even causing short-circuit faults during the use of the manufactured cable. At the same time, the use of knives can easily cause personal injury, increasing the risk of danger. Summary of the invention

[0004] In order to enrich the product categories of cable terminal head heating equipment and increase the selection space of cable terminal head heating methods, an embodiment of the present invention provides a cable terminal head heating device and method.

[0005] In a first aspect, an embodiment of the present invention provides a cable terminal head heating device, including a tube body, a heating belt, an operating handle, a temperature control mechanism and a switch;

[0006] The tube body is connected to the operating handle up and down;

[0007] The pipe body comprises a heat preservation pipe, an insulating layer and a protective sleeve which are arranged in sequence from the inside to the outside;

[0008] The heating belt comprises a resistance wire and an insulating heat-conducting layer covering the outside of the resistance wire, and the heating belt is distributed on the inner wall of the insulation pipe in a spiral shape;

[0009] The switch is connected to the heating belt and can control the start and stop of the heating belt;

[0010] The temperature control mechanism is arranged on the operating handle and includes a temperature sensor and a temperature controller connected thereto;

[0011] The temperature sensor is connected to the heating belt and can monitor the temperature of the heating belt in real time;

[0012] The temperature controller can obtain the temperature monitoring result of the temperature sensor, and when it is determined that the temperature of the heating belt exceeds the temperature threshold, control the heating belt to stop heating;

[0013] A connected battery compartment and a wiring terminal are arranged at the lower part of the operating handle.

[0014] In one or some optional embodiments, the thermostat is capable of displaying and adjusting the temperature of the heating belt.

[0015] In one or some optional embodiments, the temperature controller can control the heating belt to be in a constant temperature state according to the temperature monitoring result of the temperature sensor.

[0016] In one or some optional embodiments, the heating belt is bonded to the inner wall of the insulation pipe by high temperature resistant glue.

[0017] In one or some optional embodiments, the thermal insulation tube is a glass fiber tube.

[0018] In one or some optional embodiments, the insulating heat-conducting layer is made of thermally conductive silicone.

[0019] In one or some optional embodiments, the protective cover and the operating handle are an integral structure;

[0020] The protective cover and the operating handle are made of flame-resistant material.

[0021] In one or some optional embodiments, a rechargeable battery is installed in the battery compartment.

[0022] In one or some optional embodiments, the cable terminal head heating device further includes an external power supply line;

[0023] The external power line can be connected to the connection terminal.

[0024] In one or some optional embodiments, the switch is mounted on an outer side wall of the operating handle;

[0025] The switch is buckled and connected to the operating handle.

[0026] In a second aspect, an embodiment of the present invention provides a cable terminal head heating method, using the cable terminal head heating device described in the first aspect, comprising:

[0027] Insert the cable into the tube;

[0028] Turn on the switch and start the heating belt to heat the cable;

[0029] The temperature of the heating belt is monitored in real time through the temperature sensor, and the temperature monitoring result is transmitted to the temperature controller;

[0030] The thermostat determines whether the temperature of the heating belt exceeds a preset temperature threshold;

[0031] If so, the heating belt is controlled to stop heating.

[0032] The beneficial effects of the above technical solution provided in the embodiments of the present invention include at least:

[0033] In an embodiment of the present invention, a cable terminal head heating device is provided, in which a heating belt is tightly arranged in a tube body, and the cable can be instantly heated locally by extending the cable into the tube body, thereby softening the cable, making it easy to cut the insulation layer and the protective layer of the cable, and greatly reducing the difficulty of making the cable terminal head when the temperature is low; by providing a tube body with a multifunctional layer and tightly arranging the heating belt in the tube body, the tube body has a good thermal insulation effect and can heat up quickly, thereby increasing the speed of cable heating, saving operation time and improving work efficiency; by using a temperature sensor and a temperature controller in combination, real-time monitoring and real-time control of the temperature of the heating belt can be achieved, and when the monitored temperature is higher than the preset temperature threshold, the heating belt can be automatically controlled to stop heating, thereby avoiding cable damage and risks; by providing an operating handle, the cable terminal head heating device is easy to operate and use.

[0034] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0035] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0037] Figure 1It is a structural schematic diagram of a cable terminal head heating device provided in an embodiment of the present invention;

[0038] Figure 2 It is a schematic diagram of the structure of a heating tube provided in an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of the structure of an operating handle provided in an embodiment of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of a tube body provided in an embodiment of the present invention;

[0041] Figure 5 It is a schematic diagram of the structure of the heating belt provided in an embodiment of the present invention;

[0042] In the figure:

[0043] 1. Heating tube; 11. Tube body; 111. Insulation tube; 112. Insulation layer; 113. Protective cover; 12. Heating belt; 121. Resistance wire; 122. Insulation layer;

[0044] 2. Operating handle; 21 is a battery compartment;

[0045] 3. Temperature control mechanism; 31. Temperature controller;

[0046] 4. Switch;

[0047] 5. External power cord;

[0048] 6. Cable. DETAILED DESCRIPTION

[0049] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0050] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "far", "near", "front", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] The inventor found that in a low temperature environment, especially outdoors in winter, the outer protective layer of the cable and the insulating layer of the conductor are relatively hard, and the protective layer and insulating layer of the high-voltage cable are thicker and harder. Therefore, the following problems will occur when making the cable head: First, it is not easy to cut the cable insulation layer when using an electrician's knife to strip the cable insulation layer, which can easily cause scratches on fingers; second, the use of other tools can easily cause the cable insulation layer to crack, causing insulation damage and cost waste; third, if an open flame is used to heat the cable insulation layer, there is a risk of damage to the cable insulation layer, and the temperature is too high to easily cause burns to construction workers, and there are certain power safety hazards. The above problems have led to an increase in the difficulty of making cable heads at low temperatures, and the difficulty of making cable heads will increase construction time, affect the overall construction power transmission quality, and have a certain impact on production.

[0053] Existing cable heating equipment is mostly large heating barrels, heating boxes and other structures that heat a large number of cables as a whole. They are not convenient for movement and local instant heating. Moreover, when the temperature is very low, the cables will quickly harden once they leave such large heating equipment. Therefore, it is difficult to solve the problem of the difficulty in making cable heads in low temperature environments.

[0054] Based on this, an embodiment of the present invention provides a cable terminal head heating device and method, which are described in detail below through specific embodiments.

[0055] Embodiment 1

[0056] The embodiment of the present invention provides a cable terminal head heating device, referring to Figure 1-Figure 5 As shown, it includes a tube body 11, a heating belt 12, an operating handle 2, a temperature control mechanism 3 and a switch 4;

[0057] The tube body 11 is connected to the operating handle 2 up and down;

[0058] The pipe body 11 includes a heat preservation pipe 111, an insulating layer 112 and a protective cover 113 which are arranged in sequence from the inside to the outside;

[0059] The heating belt 12 includes a resistance wire 121 and an insulating heat-conducting layer 122 covering the outside of the resistance wire 121. The heating belt 12 is distributed on the inner wall of the insulation pipe 111 in a spiral shape.

[0060] The switch 4 is connected to the heating belt 12 and can control the start and stop of the heating belt 12;

[0061] The temperature control mechanism 3 is arranged inside the operating handle 2, and includes a connected temperature sensor (not shown in the figure) and a temperature controller 31;

[0062] The temperature sensor is connected to the heating belt 12 and can monitor the temperature of the heating belt 12 in real time;

[0063] The temperature controller 31 can obtain the temperature monitoring result of the temperature sensor, and when it is determined that the temperature of the heating belt 12 exceeds the temperature threshold, control the heating belt 12 to stop heating;

[0064] A battery compartment 21 and a connection terminal are provided at the lower part of the operating handle 2 .

[0065] In the embodiment of the present invention, referring to Figure 1 and Figure 2 As shown, the heating belt 12 and the tube body 11 together constitute the heating tube 1, and the cable 6 can be partially extended into the heating tube 1. The heat generated by the heating belt 12 heats and softens the cable 6, and the heating belt 12 is tightly and evenly distributed on the inner wall of the insulation tube 111, so that the heat generated by the heating belt 12 can evenly fill the insulation tube 111, which is convenient for evenly heating the cable 6 and quickly softening the cable 6.

[0066] In an embodiment of the present invention, an opening may be provided on the side wall of the operating handle 2, and the thermostat 31 may be a digital display thermostat 31, and components such as a display screen and adjustment keys of the thermostat 31 may be provided at the opening to facilitate real-time acquisition and adjustment of the temperature of the heating belt 12. Construction personnel may adjust the thermostat 31 at any time according to factors such as the ambient temperature and the hardness of the outer layer of the cable to change the temperature of the heating belt 12 and improve the efficiency of cable heating.

[0067] In the embodiment of the present invention, the thermostat 31 can realize constant temperature control. For example, a preset temperature value can be set on the thermostat 31, and the thermostat 31 will automatically cooperate with the temperature sensor to control the temperature of the heating belt 12 at the preset temperature value. Specifically, when the temperature sensor detects that the temperature of the heating belt 12 is less than the preset temperature value, the thermostat 31 automatically adjusts to increase the heating value of the heating belt 12 until the temperature of the heating belt 12 increases to the preset temperature value; when the temperature sensor detects that the temperature of the heating belt 12 is greater than the preset temperature value, the thermostat 31 automatically adjusts to reduce the heating value of the heating belt 12 until the temperature of the heating belt 12 drops to the preset temperature value.

[0068] In the embodiment of the present invention, the temperature controller 31 can obtain the temperature monitoring result of the temperature sensor, and determine whether the temperature of the heating belt 12 exceeds the temperature threshold (that is, whether there is abnormal over-temperature), and when the temperature of the heating belt 12 exceeds the temperature threshold, the heating belt 12 is automatically controlled to stop heating to ensure the safety of the equipment and the safety of the heated cable to avoid danger; by using the temperature sensor and the temperature controller 31 in combination, real-time monitoring and real-time control of the temperature of the heating belt 12 are achieved, and timely response can be made in the event of abnormal over-temperature to avoid cable damage and risks.

[0069] In the embodiment of the present invention, referring to Figure 1 As shown, by holding the operating handle 2 and inserting the cable 6 into the heating tube 1, the cable terminal head can be heated instantly, and the temperature of the heating belt 12 can be controlled and adjusted by the thermostat 31, so that the protective layer and the insulating layer of the cable terminal head can be softened quickly. Compared with structures such as a cable heating box or a cable heating barrel, the cable terminal head heating device provided by the present invention can heat the cable terminal head quickly and conveniently, does not take up too much space, is easy to carry and operate, and has great application and promotion value.

[0070] In the embodiment of the present invention, the protective cover 113 and the operating handle 2 can be an integrated structure, and the material of the protective cover 113 and the operating handle 2 is a flame retardant material, which can ensure safe use. Specifically, the material of the protective cover 113 and the operating handle 2 can be polylactic acid (PLA for short). PLA can be used for 3D printing technology. PLA can be directly made into the structure of the upper heating tube 1 and the lower operating handle 2 through 3D printing; PLA has the characteristics of high precision, high strength, and high toughness. After printing, it can ensure structural accuracy and sufficient strength, and can play a good protective role on the thermostat 31 in the operating handle 2 and the inside of the heating tube 1. Obviously, the structure and material of the protective cover 113 and the operating handle 2 are not limited to the above-mentioned setting method, and can be reasonably set according to actual needs. For details, please refer to the detailed records in the prior art, and no further description will be given here.

[0071] In a specific embodiment, the heating belt 12 and the inner wall of the insulation pipe 111 can be bonded by high temperature resistant glue (not shown in the figure), so as to fix the heating belt 12 and prevent the heating belt 12 from falling off and accumulating in the insulation pipe 111. The high temperature resistant glue can be alumina high temperature resistant glue, which is 3A grade flame retardant, and has a temperature resistance range of -100℃--450℃. After curing, it has certain elasticity and good adhesion, and has the characteristics of aging resistance, good tightness, fire retardancy, no odor at high temperature, strong vibration resistance, etc., which can effectively prevent the heating belt 12 from falling off and accumulating.

[0072] In the embodiment of the present invention, the material of the insulation pipe 111 can be glass fiber. Since glass fiber has good insulation and heat resistance, it can ensure the insulation effect, and it has high rigidity, wear resistance and corrosion resistance, so it can ensure a long service life.

[0073] In a specific embodiment, the insulating heat-conducting layer 122 is made of thermally conductive silicone with good insulation performance, which avoids risks such as leakage as much as possible, and can transfer the heat generated by the resistance wire 121 to the cable located in the heating tube 1, ensuring safe and stable heating of the cable terminal head.

[0074] In a specific embodiment, referring to Figure 1 and Figure 3 As shown, a slot-type battery compartment 21 is provided at the lower part of the operating handle 2, and a rechargeable battery, such as a lithium battery, is installed in the battery compartment 21. The battery can power the heating belt 12, so that the cable terminal head heating device can be used outdoors without an AC power supply, which greatly improves the convenience. A wiring terminal is provided on the side of the battery compartment 21, and the cable terminal head heating device also includes an external power cord 5. The wiring terminal can be connected to the external power cord 5, and the external power cord 5 can be connected to an external AC power supply, so as to power the heating belt 12 and charge the lithium battery; therefore, the cable terminal head heating device can use a power lithium battery, and can also be connected to an AC power supply to achieve the purpose of AC and DC dual-use, and can be used both indoors and outdoors, is easy to carry, and is simple to operate, which greatly reduces the difficulty of making cable heads in low temperature environments.

[0075] In a specific embodiment, referring to Figure 3 As shown, the switch 4 is mounted on the outer wall of the operating handle 2 and is snap-connected with the operating handle 2. The switch 4 is electrically connected to the thermostat 31 and the heating belt 12, respectively. The thermostat 31 and the heating belt 12 can be powered on and off by the switch 4. The specific circuit setting can be referred to the detailed records in the prior art, which will not be repeated here.

[0076] In the embodiment of the present invention, the specific process of using the cable terminal head heating device to heat the cable terminal head may include:

[0077] When there is no power supply in the wild or outdoors, the battery is used to power the heating belt 12, the temperature sensor and the thermostat 31. When there is power supply indoors, the external power cord 5 is plugged into the power socket for power supply;

[0078] Insert the end of the cable to be manufactured into the heating tube 1 and place it there;

[0079] Hold the operating handle 2, turn on the switch 4, and energize the heating belt 12, the temperature sensor and the temperature controller 31;

[0080] Adjust the temperature controller 31 to adjust the temperature according to factors such as cable structure, insulation layer thickness, ambient temperature, etc.;

[0081] According to the length of the cable terminal head to be made, hold the operating handle 2 and move it back and forth along the cable axis to heat the cable evenly until the outer insulation layer of the cable softens and is convenient for cutting;

[0082] After the cable terminal head is heated, turn off the switch 4, unplug the plug or remove the lithium battery to disconnect the power supply.

[0083] In the embodiment of the present invention, when manufacturing the cable terminal head, the outer insulation layer of the cable core is heated according to the above method, and a single core can be heated, or multiple cores can be heated simultaneously.

[0084] In an embodiment of the present invention, a cable terminal head heating device is provided, in which a heating belt 12 is tightly arranged in a tube body 11. The cable can be inserted into the tube body 11 to achieve local instant heating of the cable, thereby softening the cable, making it easy to cut the insulation layer and the protective layer of the cable, and greatly reducing the difficulty of making the cable terminal head when the temperature is low; by providing a tube body 11 with a multifunctional layer, and tightly arranging the heating belt 12 in the tube body 11, the tube body 11 has a good thermal insulation effect and can heat up quickly, thereby increasing the speed of cable heating, saving operation time, and improving work efficiency; by providing an operating handle 2, the cable terminal head heating device is easy to operate and use.

[0085] Embodiment 2

[0086] Based on the same inventive concept, an embodiment of the present invention further provides a cable terminal head heating method, using the cable terminal head heating device described in embodiment 1, comprising:

[0087] S101: insert the cable into the tube body 11;

[0088] S102: Turn on the switch 4 and start the heating belt 12 to heat the cable;

[0089] S103: monitor the temperature of the heating belt 12 in real time through the temperature sensor, and transmit the temperature monitoring result to the temperature controller 31;

[0090] S104: The temperature controller 31 determines whether the temperature of the heating belt 12 exceeds a preset temperature threshold, and if so, executes step S105;

[0091] S105: Control the heating belt 12 to stop heating.

[0092] In the embodiment of the present invention, the cable terminal head heating method corresponds to the cable terminal head heating device described in Example 1. Its specific implementation process can refer to the process of implementing cable terminal head heating by the cable terminal head heating device in Example 1, and the repeated parts will not be repeated.

[0093] Obviously, various changes and modifications may be made to the present invention by those skilled in the art without departing from the spirit and scope of the present invention. The present disclosure is not limited to the precise structure described above and shown in the accompanying drawings, and various changes and modifications may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims. Thus, if these changes and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and modifications.

Claims

1. A cable terminal heating device, characterized in that: It includes a pipe body, a heating belt, an operating handle, a temperature control mechanism and a switch; The tube body is connected to the operating handle up and down; The pipe body comprises a heat preservation pipe, an insulating layer and a protective sleeve which are arranged in sequence from the inside to the outside; The heating belt comprises a resistance wire and an insulating heat-conducting layer covering the outside of the resistance wire, and the heating belt is distributed on the inner wall of the insulation pipe in a spiral shape; The switch is connected to the heating belt and can control the start and stop of the heating belt; The temperature control mechanism is arranged on the operating handle and includes a temperature sensor and a temperature controller connected thereto; The temperature sensor is connected to the heating belt and can monitor the temperature of the heating belt in real time; The temperature controller can obtain the temperature monitoring result of the temperature sensor, and when it is determined that the temperature of the heating belt exceeds the temperature threshold, control the heating belt to stop heating; A connected battery compartment and a wiring terminal are arranged at the lower part of the operating handle.

2. The cable terminal head heating device according to claim 1, characterized in that: The thermostat is capable of displaying and adjusting the temperature of the heating belt.

3. The cable terminal head heating device according to claim 2, characterized in that: The temperature controller can control the heating belt to be in a constant temperature state according to the temperature monitoring result of the temperature sensor.

4. The cable terminal head heating device according to claim 1, characterized in that: The heating belt is bonded to the inner wall of the thermal insulation pipe by high temperature resistant glue.

5. The cable terminal head heating device according to claim 1, characterized in that: The thermal insulation pipe is a glass fiber pipe.

6. The cable terminal head heating device according to claim 1, characterized in that: The insulating heat-conducting layer is made of heat-conducting silica gel.

7. The cable terminal head heating device according to claim 1, characterized in that: The protective cover and the operating handle are an integrated structure; The protective cover and the operating handle are made of flame-resistant material.

8. The cable terminal head heating device according to claim 1, characterized in that: A rechargeable battery is installed in the battery compartment.

9. The cable terminal head heating device according to claim 1, characterized in that: The cable terminal head heating device also includes an external power supply line; The external power line can be connected to the connection terminal.

10. The cable terminal head heating device according to claim 1, characterized in that: The switch is mounted on the outer side wall of the operating handle; The switch is buckled and connected to the operating handle.

11. A cable terminal head heating method, using the cable terminal head heating device according to any one of claims 1 to 10, comprising: Insert the cable into the tube; Turn on the switch and start the heating belt to heat the cable; The temperature of the heating belt is monitored in real time through the temperature sensor, and the temperature monitoring result is transmitted to the temperature controller; The thermostat determines whether the temperature of the heating belt exceeds a preset temperature threshold; If so, the heating belt is controlled to stop heating.

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