An electrical heat tracing junction box

Abstract

The application discloses an electric tracing junction box, which comprises a junction box body and a temperature control device arranged on the junction box body, the junction box body is fixedly connected to a pipeline through a base, the junction box body is provided with a first through hole, a cable is inserted into the junction box body along the first through hole and connected to a terminal strip arranged in the junction box body, an electric tracing belt and a temperature probe are further connected to the terminal strip, and the electric tracing belt and the temperature probe are both extended out of the base along a second through hole, which is communicated between the junction box body and the base, so that the pipeline can be heated and the temperature of the pipeline can be monitored in real time. The electric tracing junction box can realize the power-off function when the temperature of the pipeline reaches the process requirement, thereby reducing the additional power loss of the electric tracing belt and achieving the purpose of cost reduction and benefit increase.

Description

Technical Field

[0001] This invention belongs to the field of junction box technology, and particularly relates to an electric heat tracing junction box. Background Technology

[0002] Electric heat tracing is an effective solution for pipeline insulation and antifreeze. Its working principle is to dissipate a certain amount of heat through the heat tracing medium, and replenish the loss of the heat-traced pipeline through direct or indirect heat exchange, so as to achieve the normal working requirements of heating, insulation or antifreeze.

[0003] Self-regulating electric heating tape is one of the most widely used electric heating materials. Although its output power changes according to the temperature of the surrounding pipeline and can automatically limit the temperature, it cannot achieve zero power output when the pipeline temperature reaches or exceeds the temperature required by the pipeline process. It will still generate heat and consume electricity.

[0004] Therefore, there is an urgent need to design an electric heat tracing junction box to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide an electric heat tracing junction box that has the advantages of reducing energy consumption and improving construction efficiency, and solves the problems involved in the background art.

[0006] To achieve the above objectives, the specific technical solution of the electric heat tracing junction box of the present invention is as follows: An electric heat tracing junction box includes a junction box body and a temperature control device disposed on the junction box body. The junction box body is fixedly connected to a pipeline via a base. The junction box body has a first through hole. A cable is inserted into the junction box body through the first through hole and connected to a terminal block disposed inside the junction box body. An electric heat tracing tape and a temperature probe are also connected to the terminal block. Both the electric heat tracing tape and the temperature probe extend out of the base through a second through hole connecting the junction box body and the base, so as to heat the pipeline while monitoring the pipeline temperature in real time.

[0007] Furthermore, the junction box body includes a first box and a second box. The second box is fixed to the first box by bolts, and the first box is provided with a terminal block.

[0008] Furthermore, a rubber pad is provided along the circumference of the second box body so that the second box body abuts against the first box body through the rubber pad.

[0009] Furthermore, the first box body is provided with a first through hole and a second through hole spaced apart.

[0010] Furthermore, a cable packing gland for cable connection is provided on the first through hole to ensure a safe and sealed connection of the cable to the first housing.

[0011] Furthermore, the second through hole is connected to the opening of the base through a connecting pipe, so that the electric heating cable and the temperature probe extend along the opening of the base.

[0012] Furthermore, the temperature control device is fixed to the side of the first box away from the base by a temperature-controlled silicone pad, which serves as a seal.

[0013] Furthermore, the base is provided with multiple fixing holes at intervals, through which cable ties are passed to secure the base to the outer wall of the pipeline.

[0014] Furthermore, the temperature probe includes a temperature sensing element used to monitor the temperature of the pipe.

[0015] Furthermore, the temperature probe also includes a flexible conductor, which is electrically connected to the temperature sensing element and is used to transmit electrical signals to the temperature control device.

[0016] The electric heat tracing junction box of the present invention has the following advantages: (1) The present invention can effectively save power. The temperature probe monitors the temperature of the pipeline in real time. When the pipeline temperature reaches or exceeds the temperature required by the pipeline process, the power supply to the electric heating tape is automatically stopped; when the pipeline temperature is lower than the temperature required by the pipeline process, the power supply to the electric heating tape is automatically supplied.

[0017] (2) The present invention has a simple structure and good sealing performance, and is suitable for various industries and projects.

[0018] (3) The present invention is easy to install, convenient for later maintenance and repair, and reduces the additional power loss of the electric heating tape, thus achieving the purpose of cost reduction and efficiency improvement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the electric heat tracing junction box of the present invention; Figure 2 This is a wiring diagram of the electric heat tracing junction box of the present invention; Figure 3 This is a schematic diagram of the main body of the junction box of the present invention; Figure 4 This is a schematic diagram of the structure of the second housing of the present invention; Figure 5 This is a schematic diagram of the temperature control device of the present invention; Figure 6 This is a schematic diagram of the structure of the base of the present invention; Figure 7 This is a schematic diagram of the temperature probe of the present invention; Figure 8 This is the circuit schematic diagram of the present invention.

[0020] Explanation of markings in the diagram: 1. Temperature control device; 2. Junction box body; 21. First box body; 22. Second box body; 23. Rubber pad; 3. Base; 4. First through hole; 5. Second through hole; 6. Cable; 7. Terminal block; 8. Electric heating tape; 9. Temperature probe; 91. Temperature sensing element; 92. Flexible conductor; 10. Cable stuffing box; 11. Temperature control silicone pad; 12. Fixing hole. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0023] The following is a reference to the appendix. Figure 1 To be continued Figure 8 The electric heat tracing junction box of the present invention is described.

[0024] like Figure 1 and Figure 2 As shown, the electric heat tracing junction box of the present invention includes a junction box body 2 and a temperature control device 1 disposed on the junction box body 2. The junction box body 2 is fixedly connected to the pipeline through a base 3. The junction box body 2 is provided with a first through hole 4. The cable 6 is inserted into the junction box body 2 along the first through hole 4 and connected to a terminal block 7 disposed inside the junction box body 2. The terminal block 7 is also connected to an electric heat tracing tape 8 and a temperature probe 9. The electric heat tracing tape 8 and the temperature probe 9 both extend out of the base 3 through a second through hole 5 that connects the junction box body 2 and the base 3, so as to heat the pipeline and monitor the pipeline temperature in real time.

[0025] Furthermore, such as Figures 1 to 4 As shown, the junction box body 2 includes a first box 21 and a second box 22. The second box 22 is fixed to the first box 21 by bolts, and a terminal block 7 is provided on the inner wall of the first box 21, so that the cable 6 and the electric heating tape 8 are both connected to the terminal block 7.

[0026] More specifically, a rubber pad 23 is provided along the circumference of the second box 22 so that the second box 22 abuts against the first box 21 through the rubber pad 23; wherein, preferably, the first box 21 is provided with a first through hole 4 and a second through hole 5 spaced apart.

[0027] Furthermore, such as Figure 1 As shown, a cable packing gland 10 for connecting the cable 6 is provided on the first through hole 4 so that the cable 6 can be safely and sealedly connected to the first housing 21.

[0028] More specifically, the second through hole 5 is connected to the opening of the base 3 through a connecting pipe, so that the electric heating cable 8 and the temperature probe 9 extend out along the opening of the base 3; at the same time, the temperature control device 1 is fixed to the side of the first box 21 away from the base 3 by the temperature control silicone pad 11, and the temperature control silicone pad 11 plays a sealing role.

[0029] Furthermore, such as Figures 5 to 7 As shown, the base 3 is provided with a plurality of fixing holes 12 at intervals. Preferably, the plurality of fixing holes 12 are arranged in a rectangular shape, and cable ties are passed through the fixing holes 12 so that the base 3 is tied and fixed to the outer wall of the pipeline.

[0030] More specifically, the temperature probe 9 includes a temperature sensing element 91, which is used to monitor the temperature of the pipeline; the temperature probe 9 also includes a flexible conductor 92, which is electrically connected to the temperature sensing element 91 and is used to transmit electrical signals to the temperature control device 1.

[0031] The working principle of the electric heat tracing junction box in this invention is as follows: Cable wiring stage: Use appropriate tools to loosen the fixing bolts of the junction box body 2, carefully remove the second box 22, and place it in a safe and clean place; Remove the clamping nut and sealing ring from the cable stuffing box 10. Place the clamping nut, flat washer (if any), and sealing ring onto the cable 6 in sequence. Screw the main body of the cable stuffing box 10 into the junction box body 2 from the inside and tighten it from the outside with a wrench to ensure that it is securely installed. Use wire strippers to remove the outer sheath of cable 6, exposing the internal core wires; According to the requirements of terminal block 7, strip the insulation layer at the end of the core wire to expose an appropriate length of conductor, pass the pre-treated cable 6 through the cable stuffing box 10 that has been installed on the junction box body 2, pull the cable 6 into the junction box body 2, leaving enough length for wiring and coiling, tighten the clamping nut onto the cable stuffing box 10 body, and tighten it evenly with a wrench. Use the correct crimping die to firmly crimp the terminal block 7 to the conductor, ensuring good contact and no looseness; According to the markings, connect the core wire of cable 6 to the corresponding terminal block 7 inside the junction box body 2, and neatly coil the cables inside the junction box body 2 and secure them with cable ties to avoid tangling.

[0032] Electric heat tracing wiring stage: Insert the electric heat tracing cable 8 from under the base 3 into the junction box body 2, and strip and connect the electric heat tracing cable 8; the precautions for stripping and connecting the electric heat tracing cable 8 are the same as those for the cable 6.

[0033] Temperature probe wiring stage: Pass the flexible conductor 92 of the temperature probe 9 through the base 3 into the junction box body 2. Strip and connect the flexible conductor 92. The precautions for stripping and connecting the electric heat tracing 8 are the same as those for the cable. After the wiring is completed, clean the junction box body 2. Align the rubber pad 23 with the first box 21 and close the second box 22 smoothly, ensuring that the rubber pad 23 is evenly pressed. Tighten the box cover fixing bolts evenly in a diagonal sequence. Note that the position of the temperature sensing element 91 of the temperature probe 9 should be placed according to the requirements of the electric heat tracing design documents.

[0034] Fixing stage of electric heat tracing junction box base: Use cable ties to tie it to the pipe through the fixing holes 12 of the base 3.

[0035] Temperature detection device setup stage: Set the temperature value according to the pipeline process requirements, and adjust the value using the "Set", "+" and "-" buttons.

[0036] Based on the electric heat tracing junction box, this invention can effectively save energy. The temperature probe 9 monitors the pipeline temperature in real time. When the pipeline temperature reaches or exceeds the pipeline process requirement, it automatically stops supplying power to the electric heat tracing tape; when the pipeline temperature is lower than the pipeline process requirement, it automatically supplies power to the electric heat tracing tape 8 (e.g., ...). Figure 8 (As shown).

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An electric heat tracing junction box, characterized in that, The device includes a junction box body and a temperature control device mounted on the junction box body. The junction box body is fixedly connected to the pipeline via a base. The junction box body has a first through hole. A cable is inserted into the junction box body through the first through hole and connected to a terminal block inside the junction box body. An electric heating tape and a temperature probe are also connected to the terminal block. Both the electric heating tape and the temperature probe extend out of the base through a second through hole that connects the junction box body and the base, so as to heat the pipeline while monitoring the pipeline temperature in real time.

2. The electric heat tracing junction box according to claim 1, characterized in that, The junction box body includes a first box and a second box. The second box is fixed to the first box by bolts, and the first box is provided with a terminal block.

3. The electric heat tracing junction box according to claim 2, characterized in that, A rubber pad is provided along the circumference of the second box so that the second box abuts against the first box through the rubber pad.

4. The electric heat tracing junction box according to claim 2, characterized in that, The first box body is provided with a first through hole and a second through hole spaced apart.

5. The electric heat tracing junction box according to claim 4, characterized in that, A cable packing gland for cable connection is provided on the first through hole to ensure a safe and sealed connection of the cable to the first housing.

6. The electric heat tracing junction box according to claim 4, characterized in that, The second through hole connects to the opening in the base via a connecting pipe, allowing the electric heating cable and temperature probe to extend along the opening in the base.

7. The electric heat tracing junction box according to claim 1 or 2, characterized in that, The temperature control device is fixed to the side of the first box away from the base by a temperature-controlled silicone pad, which serves as a seal.

8. The electric heat tracing junction box according to claim 1, characterized in that, The base has multiple fixing holes spaced apart, through which cable ties are passed to secure the base to the outer wall of the pipeline.

9. The electric heat tracing junction box according to claim 1, characterized in that, The temperature probe includes a temperature sensing element, which is used to monitor the temperature of the pipeline.

10. The electric heat tracing junction box according to claim 9, characterized in that, The temperature probe also includes a flexible conductor, which is electrically connected to the temperature sensing element and is used to transmit electrical signals to the temperature control device.

Images