Electric heat tracing power supply box with fault indicating lamp and electric heat tracing power supply device

Abstract

The utility model relates to an electric heat tracing power supply box with a fault indicating lamp and an electric heat tracing power supply device, the electric heat tracing power supply box with the fault indicating lamp comprises a box body, a box cover and the fault indicating lamp, the box cover can be adaptively buckled on the open end of the box body, and the fault indicating lamp is embedded on the side wall of the box body; a plurality of wiring terminals are fixed on the inner side surface of the bottom wall of the box body; and a live wire and a zero wire of the fault indicating lamp are respectively connected with two different wiring terminals. According to the electric heat tracing power supply box with the fault indicating lamp, the fault indicating lamp and the wiring terminal are arranged, and the fault indicating lamp is embedded on the side wall of the box body, so that the electric heat tracing power supply box can be matched with an external local control circuit to realize rapid fault identification and fault prompting.

Description

Technical Field

[0001] This utility model relates to the field of electric heat tracing system technology, specifically to an electric heat tracing power supply box and an electric heat tracing power supply device with a fault indicator light. Background Technology

[0002] Electric heat tracing systems are widely used for freeze protection and insulation of equipment such as pipelines and storage tanks. Traditional electric heat tracing power supply boxes typically only contain circuit breakers and power interfaces. When the circuit breaker trips due to overload, short circuit, or leakage, operators must manually check the circuit breaker status, making it difficult to quickly locate the fault and resulting in low maintenance efficiency. Existing technologies lack integrated and visualized fault indication solutions. Utility Model Content

[0003] In order to solve one or more technical problems existing in the prior art, this utility model provides an electric heat tracing power supply box and an electric heat tracing power supply device with a fault indicator light.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: an electric heat tracing power supply box with a fault indicator light, including a box body, a box cover and a fault indicator light, wherein the box cover can be adapted to be fastened to the open end of the box body, and the fault indicator light is embedded in the side wall of the box body; multiple wiring terminals are fixed on the inner side of the bottom wall of the box body, and the live wire and neutral wire of the fault indicator light are respectively connected to two different wiring terminals.

[0005] The beneficial effects of this utility model are: This utility model provides an electric heat tracing power supply box with a fault indicator light. By setting the fault indicator light and wiring terminals, the fault indicator light is embedded in the side wall of the box. It can work with an external local control circuit to achieve rapid fault identification and fault indication.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the fault indicator light includes an LED bead and a housing. The housing is filled with epoxy resin, the wiring terminals of the LED bead are embedded in the epoxy resin, and a portion of the LED bead is located outside the epoxy resin as a light-emitting segment.

[0008] The beneficial effect of adopting the above-mentioned further solution is that the LED beads with wires and resistors connected can be filled with epoxy resin in the LED bead shell to form an integrated fault indicator light, which facilitates the connection of the LED bead's wiring terminals to the wiring terminals.

[0009] Furthermore, the outer shell has an assembly cavity that extends through both ends, the assembly cavity is filled with epoxy resin, a limiting boss is provided on the outer side wall of the outer shell near the light-emitting segment, an assembly hole is opened on the side wall of the box, the outer shell is embedded in the assembly hole, and the limiting boss seals against the outer side wall around the assembly hole.

[0010] The beneficial effect of adopting the above-mentioned further solution is that by setting a limiting boss, the sealing assembly between the outer shell and the mounting hole on the box body is achieved.

[0011] Furthermore, a sealing gasket is pressed between the limiting boss and the outer wall around the assembly hole.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by setting a sealing gasket, the sealing effect between the fault indicator light and the box is better.

[0013] Furthermore, the inner side of the bottom wall of the box is fixed with multiple bosses, each of which has a first threaded blind hole. The terminal block is fixed to the boss by bolts and the first threaded blind hole, and one terminal block is fixed on each boss.

[0014] The beneficial effect of adopting the above-mentioned further solution is that by setting the boss and the first threaded blind hole, it is convenient to make a stable connection between the terminal block and the boss.

[0015] Furthermore, the outer side of the bottom wall of the box body is provided with a plurality of second threaded blind holes, and the plurality of second threaded blind holes are arranged in a one-to-one correspondence with a plurality of bosses.

[0016] The beneficial effect of adopting the above-mentioned further solution is that by setting a second threaded blind hole, it is convenient to fix the box body to the mounting bracket.

[0017] Furthermore, it also includes a mounting bracket, which is fixed to the outer side of the bottom wall of the box body by bolts engaging with a second threaded blind hole.

[0018] The beneficial effect of adopting the above-mentioned further solution is that the mounting bracket can be installed on the pipeline using clamps, providing structural support for the electric heat tracing power supply box.

[0019] Furthermore, an electric heat tracing chamber and a power supply chamber are installed on the side wall of the box.

[0020] The beneficial effect of adopting the above-mentioned further solution is that by setting up the electric heat tracing gland and the power supply gland, it is convenient to install the electric heat tracing and power supply on the electric heat tracing power supply box.

[0021] Furthermore, the housing includes multiple side walls, and the fault indicator light, the electric heat tracing gland, and the power supply gland are located on three different side walls of the housing.

[0022] The advantage of adopting the above-mentioned further solutions is that it avoids interference between the various components during installation and use.

[0023] An electric heat tracing power supply device includes the aforementioned electric heat tracing power supply box with a fault indicator light, and further includes a local control circuit, an electric heat tracing device, and a power supply. The live wire and ground wire of the electric heat tracing device are respectively connected to two different terminals among the remaining terminals. The neutral wire of the electric heat tracing device and the neutral wire of the fault indicator light are connected to the same terminal. The power supply wires are respectively connected to each terminal.

[0024] The local control circuit includes a circuit breaker, circuit breaker auxiliary contacts, and a relay. The circuit containing the fault indicator light is connected in series with the circuit breaker auxiliary contacts and the relay. The circuit containing the electric heat tracing is connected in series with the circuit breaker circuit.

[0025] The beneficial effects of this utility model are as follows: In the electric heat tracing power supply device of this utility model, the circuit where the fault indicator light is located is connected in series with the circuit breaker auxiliary contact and the relay, and the circuit where the electric heat tracing is located is connected in series with the circuit breaker circuit. One end of the circuit breaker auxiliary contact (normally open contact) is connected to the positive terminal of the power supply, and the other end is connected to the positive terminal of the fault indicator light. The negative terminal of the fault indicator light and the electric heat tracing share the negative terminal. When the circuit breaker is in the closed state, the auxiliary contact is open and the indicator light is not lit. When the electric heat tracing fails, the circuit breaker trips, the circuit breaker auxiliary contact closes, the fault indicator light is powered on and lit, indicating the fault. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the box structure of the electric heat tracing power supply box with fault indicator light according to this utility model;

[0027] Figure 2 This is a schematic diagram of the cover structure of the electric heat tracing power supply box with fault indicator light according to this utility model;

[0028] Figure 3 This is a cross-sectional view of the electric heat tracing power supply box with fault indicator light according to this utility model.

[0029] Figure 4 This is a cross-sectional view of the fault indicator light of this utility model;

[0030] Figure 5 This is a cross-sectional view of the electric heat tracing power supply box with fault indicator light and the mounting bracket after assembly.

[0031] Figure 6 This is a schematic diagram of the structure of the mounting bracket of this utility model;

[0032] Figure 7 This is the circuit schematic diagram of this utility model.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Box body; 11. Sealing ring; 12. Power supply gland; 13. Electric heat tracing gland; 14. Boss;

[0035] 2. Box lid;

[0036] 3. Fault indicator light; 31. LED bead; 32. Epoxy resin; 33. Wiring terminal; 34. Limiting boss; 35. Housing;

[0037] 4. Wiring terminals;

[0038] 5. Mounting bracket; 51. Mounting hole;

[0039] 6. Local control box; 61. Circuit breaker; 62. Circuit breaker auxiliary contacts; 63. Relay; 64. Relay contacts; 65. Contactor; 7. Electric heat tracing. Detailed Implementation

[0040] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0041] Example 1

[0042] like Figures 1-4 As shown, an electric heat tracing power supply box with a fault indicator light in this embodiment includes a box body 1, a box cover 2 and a fault indicator light 3. The box cover 2 can be adapted to be fastened to the open end of the box body 1. The fault indicator light 3 is embedded in the side wall of the box body 1. Multiple wiring terminals 4 are fixed on the inner side of the bottom wall of the box body 1. The live wire and neutral wire of the fault indicator light 3 are respectively connected to two different wiring terminals 4.

[0043] In this embodiment, the box body 1 and the lid 2 can be injection molded from polyphenylene sulfide (PPS) plastic. A sealing ring 11, specifically an O-ring, is installed on one side of the box body 1. When the lid 2 is fastened to the open end of the box body 1, it can be sealed to the box body 1. The box body 1 and the lid 2 can be fixed together with screws. The number of terminals 4 can be set as needed, specifically fixed in the middle position of the inner side of the bottom wall of the box body 1. The terminals 4 can be fixed to the inner side of the bottom wall of the box body 1 by screws or other fixing methods, or by adhesive or other fixing methods.

[0044] The fault indicator light 3 in this embodiment can be a commonly used indicator light on the market.

[0045] In this embodiment, both the box body 1 and the box lid 2 can adopt a rectangular structure.

[0046] This embodiment provides an electric heat tracing power supply box with a fault indicator light. By setting the fault indicator light and wiring terminals, the fault indicator light is embedded in the side wall of the box. It can work with an external local control circuit to achieve rapid fault identification and fault indication.

[0047] Example 2

[0048] Based on Embodiment 1, this embodiment provides a preferred solution for the fault indicator light 3. For example... Figure 2 As shown, the fault indicator light 3 includes an LED bead 31 and a housing 35. The housing 35 is filled with epoxy resin 32. The wiring terminals 33 of the LED bead 31 are embedded in the epoxy resin 32, and a portion of the LED bead 31 is located outside the epoxy resin 32 as a light-emitting segment. An LED bead with wires and resistors already connected can be filled with epoxy resin in its housing to form a complete fault indicator light, facilitating connection between the LED bead's wiring terminals and the terminal blocks.

[0049] Furthermore, such as Figure 2 As shown, the outer casing 35 has an assembly cavity extending through both ends, filled with epoxy resin 32. A limiting boss 34 is provided on the outer side wall of the outer casing 35 near the light-emitting segment. An assembly hole is provided on the side wall of the housing 1, and the outer casing 35 is fitted into the assembly hole. The limiting boss 34 seals against the outer side wall surrounding the assembly hole. The limiting boss ensures a sealed assembly between the outer casing 35 and the assembly hole on the housing 1. Fitting the outer casing 35 into the assembly hole facilitates the replacement and disassembly of the fault indicator light.

[0050] Specifically, a sealing gasket is pressed between the limiting boss 34 and the outer wall around the assembly hole. By setting the sealing gasket, the sealing effect between the fault indicator light and the housing is improved.

[0051] Example 3

[0052] Based on Embodiment 1 or Embodiment 2, this embodiment provides a preferred installation method for the terminal block 4. For example... Figure 1 and Figure 3 As shown, multiple bosses 14 are fixed on the inner side of the bottom wall of the box 1. Each boss 14 has a first threaded blind hole. The terminal block 4 is fixed to the boss 14 by bolts engaging with the first threaded blind hole. One terminal block 4 is fixed to each boss 14. By setting the bosses and the first threaded blind hole, a stable connection between the terminal block and the boss is facilitated.

[0053] In this embodiment, the boss 14 can be cylindrical or rectangular columnar, etc.

[0054] Preferred, such as Figure 1 As shown, four protrusions 14 can be provided on the inner side of the bottom wall of the box 1 in this embodiment, and a terminal block 4 is provided on each protrusion 14.

[0055] Example 4

[0056] Based on any of the above embodiments, this embodiment also provides an assembly method for the mounting bracket 5. For example... Figure 5 and Figure 6 As shown, the outer side of the bottom wall of the box 1 has multiple second threaded blind holes, which are arranged in a one-to-one correspondence with multiple bosses 14. The second threaded blind holes facilitate the fixed connection between the box and the mounting bracket. The first and second threaded blind holes are not interconnected; they can be coaxially arranged or staggered.

[0057] Furthermore, the electric heat tracing power supply box with fault indicator light 3 in this embodiment can be used with mounting bracket 5. The mounting bracket 5 is fixed to the outer side of the bottom wall of the box body 1 by bolts engaging with the second threaded blind hole. The mounting bracket can be installed on the pipe using clamps to provide structural support for the electric heat tracing power supply box. The mounting bracket 5 has mounting holes 51, which can be connected and fixed by bolts by corresponding to the second threaded blind hole.

[0058] Example 5

[0059] Based on any of the above embodiments, in this embodiment, an electric heat tracing gland 13 and a power supply gland 12 are installed on the side wall of the housing 1. By providing the electric heat tracing gland and the power supply gland, it is convenient to install the electric heat tracing and power supply on the electric heat tracing power supply box. The electric heat tracing can enter the housing through the electric heat tracing gland, and the power supply can enter the housing through the power supply gland.

[0060] Further preferred, such as Figure 1 As shown, the housing 1 includes multiple side walls, and the fault indicator light 3, the electric heat tracing gland 13, and the power supply gland 12 are respectively located on three different side walls of the housing 1. This avoids interference between the components during installation and use. When the housing 1 is preferably a rectangular housing, the rectangular housing has four side walls, and the electric heat tracing gland 13 and the power supply gland 12 are respectively located on three different side walls of the rectangular housing.

[0061] Example 6

[0062] Based on any of the above embodiments, such as Figures 1-5 and Figure 7 As shown, this embodiment provides an electric heat tracing power supply device, including the aforementioned electric heat tracing power supply box with a fault indicator light, and further including a local control circuit, an electric heat tracing 7, and a power supply. The live wire and ground wire of the electric heat tracing 7 are respectively connected to two different terminals 4 among the remaining terminals 4. The neutral wire of the electric heat tracing 7 and the neutral wire of the fault indicator light 3 are connected to the same terminal 4. The power supply wires are respectively connected to each terminal 4 to supply power to each electrical component. In this embodiment, the local control circuit can be integrated into a local control box 6, such as... Figure 7As shown, outgoing terminals are respectively protruding from the side wall of the local control box 6 for electrical connection with electric heat tracing and fault indicator lights.

[0063] The local control circuit includes a circuit breaker 61, a circuit breaker auxiliary contact 62, and a relay 63. The circuit containing the fault indicator 3 is connected in series with the circuit breaker auxiliary contact 62 and the relay 63. The circuit containing the electric heat tracing 7 is connected in series with the circuit breaker 61. Specifically, as shown... Figure 7 As shown, the circuit where the circuit breaker 61 is located is also equipped with a contactor 65, and the circuit where the fault indicator light 3 is located is also equipped with a relay contact 64.

[0064] When the electric heat tracing 7 fails, the circuit breaker 61 trips, causing the circuit breaker auxiliary contact 62 to close, the relay 63 to be energized, the relay contact 64 to close, and the fault indicator light 3 to illuminate.

[0065] In this embodiment of the electric heat tracing power supply device, the circuit containing the fault indicator light is connected in series with the circuit breaker auxiliary contacts and the relay, and the circuit containing the electric heat tracing is connected in series with the circuit breaker circuit. This is equivalent to connecting one end of the circuit breaker auxiliary contact (normally open contact) to the positive terminal of the power supply and the other end to the positive terminal of the fault indicator light. The negative terminal of the fault indicator light and the electric heat tracing share the same negative terminal. When the circuit breaker is in the closed state, the auxiliary contact is open and the indicator light is not lit. When the electric heat tracing fails, the circuit breaker trips, the circuit breaker auxiliary contact closes, and the fault indicator light is powered on and lit to indicate the fault.

[0066] In the description of this utility model, it should be understood that the terms "bottom wall", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0069] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electric heat tracing power supply box with a fault indicator light, characterized in that, The device includes a housing, a cover, and a fault indicator light. The cover can be fitted and fastened to the open end of the housing. The fault indicator light is embedded in the side wall of the housing. Multiple wiring terminals are fixed on the inner side of the bottom wall of the housing. The live wire and neutral wire of the fault indicator light are respectively connected to two different wiring terminals.

2. The electric heat tracing power supply box with fault indicator light according to claim 1, characterized in that, The fault indicator light includes an LED and a housing. The housing is filled with epoxy resin, the terminals of the LED are embedded in the epoxy resin, and a portion of the LED is located outside the epoxy resin as a light-emitting segment.

3. The electric heat tracing power supply box with fault indicator light according to claim 2, characterized in that, The outer shell has an assembly cavity that extends through both ends and is filled with epoxy resin. A limiting boss is provided on the outer side wall of the outer shell near the light-emitting segment. An assembly hole is provided on the side wall of the box body. The outer shell is embedded in the assembly hole, and the limiting boss seals against the outer side wall around the assembly hole.

4. The electric heat tracing power supply box with fault indicator light according to claim 3, characterized in that, A sealing gasket is pressed between the limiting boss and the outer wall around the assembly hole.

5. An electric heat tracing power supply box with a fault indicator light according to any one of claims 1 to 4, characterized in that, Multiple bosses are fixed on the inner side of the bottom wall of the box. Each boss has a first threaded blind hole. The terminal block is fixed to the boss by bolts and the first threaded blind hole. One terminal block is fixed on each boss.

6. The electric heat tracing power supply box with fault indicator light according to claim 5, characterized in that, The bottom wall of the box has multiple second threaded blind holes on its outer side, and the multiple second threaded blind holes are arranged in a one-to-one correspondence with multiple bosses.

7. The electric heat tracing power supply box with fault indicator light according to claim 6, characterized in that, It also includes a mounting bracket, which is fixed to the outer side of the bottom wall of the box body by bolts and a second threaded blind hole.

8. An electric heat tracing power supply box with a fault indicator light according to any one of claims 1 to 4, characterized in that, The side wall of the box is equipped with an electric heat tracing chamber and a power supply chamber.

9. The electric heat tracing power supply box with fault indicator light according to claim 8, characterized in that, The housing includes multiple side walls, and the fault indicator light, the electric heat tracing gland, and the power supply gland are located on three different side walls of the housing.

10. An electric heat tracing power supply device, characterized in that, The electric heat tracing power supply box with fault indicator light as described in any one of claims 1 to 9 further includes a local control circuit, electric heat tracing and power supply, wherein the live wire and ground wire of the electric heat tracing are respectively connected to two different terminals among the remaining terminals, the neutral wire of the electric heat tracing and the neutral wire of the fault indicator light are connected to the same terminal, and the power supply wires are respectively connected to each terminal. The local control circuit includes a circuit breaker, circuit breaker auxiliary contacts, and a relay. The circuit containing the fault indicator light is connected in series with the circuit breaker auxiliary contacts and the relay. The circuit containing the electric heat tracing is connected in series with the circuit breaker circuit.

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