An electrical heating cable thermostat assembly

Abstract

The utility model provides a kind of electric heating cable temperature limiter assembly, including electric heat tracing, further including wire box, the front side of wire box is fixed with wire cover, the inside of wire cover is fixed with inner reinforcing ring in the 2mm-7mm range of its inner wall, the rear side of this inner reinforcing ring extends to the front end inside of wire box, user can be wound by electric heat tracing to pipeline and other equipment facilities, contact part is resisted and touched in the surface of equipment facility that needs heating or heat preservation, start-stop processing of electric heat tracing is completed by temperature switch self temperature threshold and external environment temperature, realize temperature switch to the temperature limiting processing of electric heat tracing.

Description

Technical Field

[0001] This utility model mainly relates to the field of electric heating cable technology, specifically to an electric heating cable temperature limiter assembly. Background Technology

[0002] When electric heating cables are used to provide heating protection for pipelines or equipment in low-temperature environments or for routine insulation of facilities, users usually choose to install the electric heating cables on pipelines or other equipment, connect them to the circuit, and keep the electric heating cables in a state of continuous power supply and heating for a long time.

[0003] To ensure that the electric heating tape can meet the heating or insulation needs of equipment and facilities in real time, the electric heating tape can be combined with a temperature switch. The temperature switch can be customized to meet the procurement needs of different customers. At the same time, in the integration of the electric heating tape and the temperature switch, it is also necessary to determine the specific installation location of the temperature switch according to the actual use scenario. This allows the temperature switch to promptly obtain changes in the external ambient temperature or the temperature of the heated equipment, realize the opening and closing of the electric heating tape, and complete the temperature limiting treatment of the electric heating tape for heating or insulation of the equipment.

[0004] The inventors proposed a temperature limiter assembly for electric heating cables, which integrates electric heating tape and temperature switch. The temperature switch can be installed in the middle or end of the electric heating tape cable. The structure of the junction box and cable cover is optimized, and a contact part that meets the assembly requirements of the temperature switch is designed. The final packaging process of the electric heating tape and temperature switch is completed. Utility Model Content

[0005] 1. Technical problem solved by the utility model: This utility model provides a temperature limiter assembly for electric heating cables. Through optimization of the junction box and cable cover, it meets the requirement of assembling a temperature switch in the middle or end of the electric heating cable.

[0006] 2. Technical Solution: To achieve the above objectives, the technical solution provided by this utility model is as follows: an electric heating cable temperature limiter assembly, including an electric heating cable and a cable box, wherein a cable cover is fixedly provided on the front side of the cable box, and an inner reinforcing ring is fixedly provided on the inner side of the cable cover within a range of 2 mm to 7 mm from its inner wall, and the rear side of the inner reinforcing ring extends to the inner front end of the cable box.

[0007] Furthermore, a temperature switch is electrically connected to the middle or end of the cable of the electric heating tape, and the temperature switch is located inside the junction box.

[0008] Furthermore, an assembly gap is reserved between the outer side of the inner reinforcing ring and the inner wall of the wire box. The front edge of the wire box is embedded in the outer side of the inner reinforcing ring and the rear side of the inner wall of the wire cover. A stop block is detachably snapped into the middle of the rear end of the wire cover, and the rear side of the stop block abuts against the front side of the temperature switch.

[0009] When the junction box and cover are made of plastic, ultrasonic welding can be used to assemble them. The inner reinforcing ring is embedded into the edge of the junction box to improve the structural strength of the junction box and cover after assembly. To further improve the sealing performance between the junction box and cover, sealant can be applied to the outside of the inner reinforcing ring, combined with a heat shrink sleeve at the wire hole, to improve the sealing performance of the product. This ensures that when the product is heated to pipes and other facilities in low-temperature environments, the temperature rise will not cause sealing failure between the electric heating tape sheath, junction box, and cover.

[0010] Furthermore, the top and bottom of the junction box are provided with wire holes, and the junction box can be assembled in the middle of the electric heating tape. The rear end of the junction box is fixed with a contact part, the inner side of which is in contact with the outer side of the temperature switch. The ratio of the wall thickness of the contact part to the wall thickness of the junction box is 0.6-0.9.

[0011] Furthermore, heat shrink sleeves are fitted onto the top and bottom of the junction box, and the opposite sides of the two heat shrink sleeves are respectively fitted onto the top and bottom of the junction box.

[0012] Furthermore, multiple first card plates are fixed at equal intervals on the top and bottom of the inner wall of the junction box, and a first card slot for cooperating with the electric heating cable core is opened at the front center of the first card plate.

[0013] Furthermore, multiple second clips are fixed at equal intervals on the top and bottom of the inner wall of the wire cover. A central frame is fixed through the middle of the multiple second clips. The rear end of the second clips extends to the inner side of the front end of two adjacent first clips. A second slot for matching the electric heating cable core is opened in the middle of the rear end of the second clip.

[0014] Furthermore, the top of the junction box has a wire hole, and the junction box is assembled to the end of the electric heating tape.

[0015] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this utility model has the following advantages: This utility model provides an electric heating cable temperature limiter assembly. Users can wrap the electric heating cable around pipes and other equipment and facilities, and place the contact part against the surface of the equipment and facilities that need to be heated or insulated. The start and stop of the electric heating cable is completed by the temperature threshold of the temperature switch itself and the external ambient temperature, so as to realize the temperature limit treatment of the electric heating cable by the temperature switch. This utility model provides a temperature limiter assembly for electric heating cables. When the wire box and wire cover are made of plastic, they can be assembled using ultrasonic welding. The inner reinforcing ring and wire cover are embedded into the edge of the wire box, which improves the structural strength of the assembled wire box and wire cover. To further improve the sealing performance between the wire box and wire cover, sealant can be applied to the outside of the inner reinforcing ring. Combined with the heat shrink sleeve at the wire hole, the sealing performance of the product is improved, ensuring that when the product heats pipes and other facilities in low-temperature environments, the temperature rise will not cause sealing failure between the electric heating cable sheath, wire box and wire cover. The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the wire box structure with double wire hole configuration of this utility model; Figure 2 This is a perspective view of a wire box with a single wire hole configuration according to this utility model; Figure 3 This is an exploded view of the wire box structure with double wire hole configuration of this utility model; Figure 4 This is an exploded view of a wire box with a single wire hole configuration according to this utility model; Figure 5 This is a half-sectional perspective view of the wire box structure with a single wire hole configuration according to this utility model; Figure 6 This is a half-sectional perspective view of the wire box structure with double wire hole configuration of this utility model; Figure 7 This is a utility model Figure 6 Enlarged view of the structure at point A in the middle; Figure 8 This is a half-sectional perspective view of the wire cover structure of this utility model; Figure 9 This is a utility model Figure 8 Enlarged view of the structure at point B; Figure 10 This is a schematic diagram of the usage state of the structure of this utility model when installed on the outside of a pipeline.

[0017] Figure label: Electric heat tracing tape-1; Temperature switch -2; Junction box-3; Wire hole-31; Contact part-32; First card plate-33; Line cover-4; Inner reinforcing ring-41; Second clamping plate-42; Central frame-43; Heat shrink sleeve - 5. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element; the terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] See attached document Figures 1-10 This utility model provides an electric heating cable temperature limiter assembly, including an electric heating cable 1 and a cable box 3. A cable cover 4 is fixedly provided on the front side of the cable box 3. An inner reinforcing ring 41 is fixedly provided on the inner side of the cable cover 4 within a range of 2 mm to 7 mm from its inner wall. The rear side of the inner reinforcing ring 41 extends to the inner front end of the cable box 3.

[0022] In this embodiment, a temperature switch 2 is electrically connected to the middle or end of the cable of the electric heating tape 1, and the temperature switch 2 is located inside the junction box 3.

[0023] Temperature switch 2 allows customers to select different temperature thresholds based on their purchasing needs, so that when the electric heating cable 1 heats or insulates pipes and other equipment to a specified temperature, it can cut off the power to save energy, or when the external ambient temperature drops to the temperature threshold, the electric heating cable 1 can be powered on in time to start heating.

[0024] In this embodiment, an assembly gap is reserved between the outer side of the inner reinforcing ring 41 and the inner wall of the wire box 3. The front edge of the wire box 3 is embedded in the outer side of the inner reinforcing ring 41 and the rear side of the inner wall of the wire cover 4. A stop block is detachably snapped into the middle of the rear end of the wire cover 4. The rear side of the stop block abuts against the front side of the temperature switch 2.

[0025] The structure of the inner reinforcing ring 41 and the central skeleton 43 improves the structural strength of the line cover 4.

[0026] In this embodiment, wire holes 31 are provided at the top and bottom of the wire box 3. The wire box 3 can be assembled in the middle of the electric heating tape 1. A contact part 32 is fixed at the rear end of the wire box 3. The inner side of the contact part 32 is in contact with the outer side of the temperature switch 2. The ratio of the wall thickness of the contact part 32 to the wall thickness of the wire box 3 is 0.6-0.9.

[0027] The contact part 32 is designed to house the temperature switch 2 inside the junction box 3. When using this product, the user can wrap the electric heating tape 1 around pipes and other equipment and facilities, and then place the contact part 32 against the surface of the equipment and facilities that need to be heated or insulated. The start and stop of the electric heating tape 1 is controlled by the temperature threshold of the temperature switch 2 itself and the external ambient temperature.

[0028] In this embodiment, heat shrink sleeves 5 are fitted onto the top and bottom of the junction box 3, and the opposite sides of the two heat shrink sleeves 5 are fitted onto the top and bottom of the junction box 4, respectively.

[0029] The heat shrink sleeve 5 improves the sealing performance between the sheath of the electric heating tape 1 and the wire hole 31.

[0030] In this embodiment, multiple first clamping plates 33 are fixed at equal intervals on the top and bottom of the inner wall of the junction box 3. A first clamping groove for the electric heating cable 1 core is opened at the front center of the first clamping plate 33. Multiple second clamping plates 42 are fixed at equal intervals on the top and bottom of the inner wall of the cable cover 4. A central frame 43 is fixed through the middle of the multiple second clamping plates 42. The rear end of the second clamping plate 42 extends to the inner side of the front end of two adjacent first clamping plates 33. A second clamping groove for the electric heating cable 1 core is opened at the rear center of the second clamping plate 42.

[0031] The staggered arrangement of the first card plate 33 and the second card plate 42, combined with the first card slot and the second card slot, completes the anti-pull treatment of the wire core of the electric heating tape 1 inside the wire box 3, preventing the electric heating tape 1 from detaching from the wire box 3.

[0032] In this embodiment, the top of the junction box 3 is provided with a wire hole 31, and the junction box 3 is assembled at the end of the electric heating tape 1.

[0033] The junction box 3 can be installed in the middle or at the end of the electric heating cable 1, depending on whether it has two wire holes 31 installed in the middle of the electric heating cable 1 or a single wire hole 31 installed at the end of the electric heating cable 1, to meet the actual needs of different customers.

[0034] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electric heating cable temperature limiter assembly, comprising an electric heating cable (1), characterized in that: It also includes a wire box (3), on the front side of which a wire cover (4) is fixedly provided. An inner reinforcing ring (41) is fixedly provided on the inner side of the wire cover (4) within a range of 2 mm to 7 mm from its inner wall. The rear side of the inner reinforcing ring (41) extends to the inner front end of the wire box (3).

2. The electric heating cable temperature limiter assembly according to claim 1, characterized in that: A temperature switch (2) is electrically connected to the middle or end of the cable of the electric heating tape (1), and the temperature switch (2) is located inside the junction box (3).

3. The electric heating cable temperature limiter assembly according to claim 1, characterized in that: An assembly gap is reserved between the outer side of the inner reinforcing ring (41) and the inner wall of the wire box (3). The front edge of the wire box (3) is embedded in the outer side of the inner reinforcing ring (41) and the rear side of the inner wall of the wire cover (4). A stop block is detachably snapped into the middle of the rear end of the wire cover (4). The rear side of the stop block abuts against the front side of the temperature switch (2).

4. The electric heating cable temperature limiter assembly according to claim 1, characterized in that: The top and bottom of the wire box (3) are provided with wire holes (31). The wire box (3) can be installed in the middle of the electric heating tape (1). The rear end of the wire box (3) is fixed with a contact part (32). The inner side of the contact part (32) is in contact with the outer side of the temperature switch (2). The wall thickness of the contact part (32) is 0.6-0.9 times the wall thickness of the wire box (3).

5. The electric heating cable temperature limiter assembly according to claim 1, characterized in that: The top and bottom of the wire box (3) are fitted with heat shrink sleeves (5), and the opposite sides of the two heat shrink sleeves (5) are fitted with the top and bottom of the wire cover (4) respectively.

6. The electric heating cable temperature limiter assembly according to claim 1, characterized in that: The inner wall of the junction box (3) is provided with multiple first card plates (33) at equal intervals at the top and bottom of the inner wall. The front end of the first card plate (33) is provided with a first card slot for the electric heating tape (1) wire core.

7. The electric heating cable temperature limiter assembly according to claim 1, characterized in that: The inner wall of the wire cover (4) is provided with multiple second card plates (42) at equal intervals at the top and bottom. A central frame (43) is provided through the middle of the multiple second card plates (42). The rear end of the second card plate (42) extends to the inner side of the front end of two adjacent first card plates (33). A second card slot for matching the wire core of the electric heating tape (1) is opened in the middle of the rear end of the second card plate (42).

8. The electric heating cable temperature limiter assembly according to claim 1, characterized in that: The top of the junction box (3) is provided with a wire hole (31), and the junction box (3) is assembled at the end of the electric heating tape (1).

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