Sealing electric tracing band current limiter assembly

Abstract

The utility model discloses a sealing electric tracing band current limiter assembly, which comprises a current limiter body, a plurality of leads, a base and a cover cap, and is characterized in that the current limiter body is fixedly connected in a cavity in the center of the top surface of the base and comprises a plurality of wiring terminals connected with a power supply and other electric devices through the leads; the top surface of the base is provided with a plurality of first arc-shaped grooves which are located on the same straight line with the terminals and can penetrate through the cavity of the base and the external space of the base, and the bottom surface of the cover is provided with a plurality of second arc-shaped grooves. The first arc-shaped groove and the second arc-shaped groove can be spliced to form a through hole matched with the diameter of a wire, and the wiring end which may have a discharge phenomenon in the using process is sealed in the shell formed by the base and the cover shell. Therefore, flammable and explosive gas or dust at the terminal and outside are isolated, and dangerous situations such as explosion are effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of current limiter technology, and in particular to a sealed electric heating tape current limiter assembly. Background Technology

[0002] Electric heating tapes are widely used in pipelines and storage tanks in industries such as petroleum, chemical, and power for heat tracing, insulation, anti-condensation, and freeze protection. However, electric heating tapes currently suffer from excessive starting current. If directly energized, this could lead to short circuits or even fires. To suppress excessive starting current, a current limiter is connected in series between the electric heating tape and the power supply. The current limiter typically has its circuit board encapsulated in a protective shell, while the terminals are exposed outside the shell. The current limiter generally has four terminals: two connected to the power supply and two connected to the load electric heating tape. Since the terminals may discharge, there is a risk of explosion when the current limiter is used in environments containing flammable or explosive gases or dust. Utility Model Content

[0003] To address the technical problems existing in the background art, this utility model proposes a sealed electric heating tape current limiter assembly.

[0004] A hermetically sealed electric heating cable current limiter assembly includes: a current limiter body, multiple wires, a base, and a cover. The current limiter body is fixedly connected to a cavity in the center of the top surface of the base. The current limiter body includes multiple terminals that are connected to a power source and other electrical components via wires. The top surface of the base has multiple first arc-shaped grooves that are aligned with each terminal and can penetrate the cavity of the base and the external space of the base. The bottom surface of the cover has multiple second arc-shaped grooves. When the cover is fastened and fixed to the base, it forms a shell that seals the current limiter body therein. The first and second arc-shaped grooves can be combined to form a through hole that matches the diameter of the wires.

[0005] Preferably, the current limiter assembly further includes an elastic sealing gasket attached to the wall surfaces of the first and second arc-shaped grooves, wherein the diameters of the first and second arc-shaped grooves are larger than the diameter of the wire, and the elastic sealing gasket is filled and squeezed between the outer peripheral surface of the wire and the wall surfaces of the first and second arc-shaped grooves.

[0006] Preferably, the outer surfaces of both the base and the cover are coated with insulating varnish.

[0007] Preferably, the base cavity also has two guide blocks located on both sides of the flow limiter body, the guide blocks have guide grooves, and the cover has two guide rods. When the cover is fastened and fixed on the base, the guide rods can be inserted into the guide grooves.

[0008] Preferably, the guide block is in close contact with the side of the current limiter body.

[0009] Preferably, the portions of the multiple wires located inside the through holes are all fitted with heat-shrink tubing.

[0010] Preferably, the cover and the base are connected together by bolts.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] By sealing the terminals, which may experience discharge during use, within a housing formed by the base and cover, the terminals are isolated from external flammable and explosive gases or dust, effectively preventing dangerous situations such as explosions. Each wire is provided with a suitable through-hole for it to pass through. Compared to a sealed housing with only one conduit, this design allows the through-hole to better match the shape of a regular single wire, thus avoiding gaps between the through-hole and the wire. It also makes it easier for operators to identify the correct wire and prevent incorrect wiring. Furthermore, making the through-hole a split design consisting of a first arc-shaped groove and a second arc-shaped groove reduces friction when the wire passes through the hole and makes wiring easier. Attached Figure Description

[0013] Figure 1 This is a top view that mainly includes the base and the current limiter body.

[0014] Figure 2 for Figure 1 A magnified view of part A.

[0015] Figure 3 A bottom view of the cover and elastic sealing gasket.

[0016] Figure 4 Front view of the hermetically sealed electric heating cable current limiter assembly.

[0017] Figure 5 for Figure 4 A magnified view of part B. Detailed Implementation

[0018] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] Reference Figures 1 to 5A hermetically sealed electric heating cable current limiter assembly includes: a current limiter body 1, multiple wires 2, a base 3, and a cover 4. The current limiter body 1 is fixedly connected to a cavity 31 in the center of the top surface of the base 3. The current limiter body 1 includes multiple terminals 11 that are connected to the power supply and other electrical components through the wires 2. The top surface of the base 3 has multiple first arc-shaped grooves 32 that are located on the same straight line as each terminal 11 and can penetrate the cavity 31 of the base and the external space of the base 3. The bottom surface of the cover 4 has multiple second arc-shaped grooves 41. When the cover 4 is fastened and fixed on the base 3, it can form a shell that seals the current limiter body 1 therein, and the first arc-shaped grooves 32 and the second arc-shaped grooves 41 can be combined to form a through hole that matches the diameter of the wires 2.

[0020] By sealing the terminal 11, which may discharge during use, within the housing formed by the base 3 and the cover 4, the terminal 11 is isolated from flammable and explosive gases or dust, effectively preventing dangerous situations such as explosions. Each wire 2 is provided with a suitable through hole for it to pass through. Compared with the sealed housing that usually only has one conduit, this design allows the through hole to better match the shape of the regular single wire 2, thus avoiding gaps between the through hole and the wire 2. It also makes it easier for operators to identify the correct wire 2 and prevent incorrect connection. In addition, making the through hole into a split type consisting of a first arc-shaped groove 32 and a second arc-shaped groove 41 reduces friction when the wire 2 passes through the hole and makes wiring easier.

[0021] Reference Figure 2 , Figure 5 The current limiter assembly also includes an elastic sealing gasket 5 attached to the wall surface of the first arc-shaped groove 32 and the second arc-shaped groove 41. The diameter of the first arc-shaped groove 32 and the second arc-shaped groove 41 is larger than the diameter of the wire 2. The elastic sealing gasket 5 is filled and squeezed between the outer peripheral surface of the wire 2 and the wall surface of the first arc-shaped groove 32 and the second arc-shaped groove 41 to enhance the sealing performance and improve the explosion-proof performance.

[0022] The outer surfaces of both the base 3 and the cover 4 are coated with insulating varnish to further improve the explosion-proof performance of the components.

[0023] Reference Figure 1 , Figure 3 , Figure 4 The base cavity 31 also has two guide blocks 33 located on both sides of the flow limiter body 1. The guide blocks 33 have guide grooves 331. The cover 4 has two guide rods 42. When the cover 4 is fastened and fixed on the base 3, the guide rods 42 can be inserted into the guide grooves 331 to make the base 3 and the cover 4 quickly aligned, preventing gaps caused by misalignment and ensuring the sealing of the shell.

[0024] Reference Figure 1The guide block 33 is closely attached to the side of the current limiter body 1 so that the guide block 33 and the guide rod 42 can also limit and fix the current limiter body 1 after they are engaged.

[0025] Reference Figure 2 , Figure 5 The portions of multiple conductors 2 located within the through holes are all fitted with heat-shrink tubing 6. Because heat-shrink tubing 6 has good insulation and flame-retardant properties, it can enhance the explosion-proof performance of the components.

[0026] like Figure 1 As shown, a threaded hole 34 can be made on the top edge of the base 3, and a through hole 43 can be made on the corresponding position on the bottom edge of the cover 4. Then, bolts can be used to connect them, which can not only play a reliable connection role, but also facilitate subsequent disassembly and maintenance.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sealable electric heat trace tape flow restrictor assembly, comprising: Includes: a current limiter body (1), multiple wires (2), a base (3) and a cover (4). The current limiter body (1) is fixedly connected to the cavity (31) in the center of the top surface of the base (3). The current limiter body (1) includes multiple terminals (11) connected to the power supply and other electrical components through wires (2). The top surface of the base (3) is provided with multiple first arc-shaped grooves (32) that are located on the same straight line as each terminal (11) and can penetrate the cavity (31) of the base and the external space of the base (3). The bottom surface of the cover (4) is provided with multiple second arc-shaped grooves (41). When the cover (4) is fastened and fixed on the base (3), a shell that seals the current limiter body (1) can be formed, and the first arc-shaped grooves (32) and the second arc-shaped grooves (41) can be combined to form a through hole that matches the diameter of the wires (2).

2. The sealed electrical trace heater restrictor assembly of claim 1, wherein, It also includes an elastic sealing gasket (5) applied to the walls of the first arc-shaped groove (32) and the second arc-shaped groove (41). The diameters of the first arc-shaped groove (32) and the second arc-shaped groove (41) are larger than the diameter of the wire (2). The elastic sealing gasket (5) is filled and squeezed between the outer circumference of the wire (2) and the walls of the first arc-shaped groove (32) and the second arc-shaped groove (41).

3. The sealed electrical trace heater restrictor assembly of claim 1, wherein, The outer surfaces of the base (3) and the cover (4) are coated with insulating paint.

4. The hermetically sealed electric heating tape current limiter assembly according to claim 1, characterized in that, The base cavity (31) also has two guide blocks (33) located on both sides of the flow limiter body (1). The guide blocks (33) have guide grooves (331), and the cover (4) has two guide rods (42). When the cover (4) is fastened and fixed on the base (3), the guide rods (42) can be adapted to be inserted into the guide grooves (331).

5. The electrical heat trace limited flow assembly of claim 4, wherein, The guide block (33) is attached to the side of the current limiter body (1).

6. The sealed electrical trace heater restrictor assembly of claim 1, wherein, The portions of multiple wires (2) located inside the through hole are all fitted with heat shrink tubing (6).

7. The sealed electrical trace heater restrictor assembly of claim 1, wherein, The cover (4) and the base (3) are connected together by bolts.

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