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

Abstract

The invention 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 at the open end of the box body, and the fault indicating lamp is embedded in 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 in 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] The present invention relates to the technical field of electric heating systems, and in particular to an electric heating power supply box with a fault indicator light and an electric heating power supply device. Background Art

[0002] Electric heat tracing systems are widely used for frost protection and insulation of equipment such as pipelines and storage tanks. Traditional electric heat tracing power supply boxes typically consist solely of a circuit breaker and power connector. When a circuit breaker trips due to overload, short circuit, or leakage, operators must manually check the breaker status, making it difficult to quickly locate the fault and resulting in inefficient maintenance. Existing technologies lack integrated, visual fault indication solutions. Summary of the Invention

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

[0004] The technical solution of the present invention to solve the above technical problems is as follows: an electric heating power supply box with a fault indicator light, comprising a box body, a box cover and a fault indicator light, the box cover being adaptable and snap-fitted onto the open end of the box body, the fault indicator light being embedded in the side wall of the box body; a plurality of wiring terminals being fixed to the inner side surface of the bottom wall of the box body, the live wire and the neutral wire of the fault indicator light being connected to two different wiring terminals respectively.

[0005] The beneficial effects of the present invention are as follows: an electric heating power supply box with a fault indicator light of the present invention, by providing a fault indicator light and a wiring terminal, the fault indicator light is embedded in the side wall of the box body, and can cooperate with an external on-site control circuit to realize rapid fault identification and fault prompting.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the fault indicator light includes a lamp bead and a shell, the shell is filled with epoxy resin, the connection terminal of the lamp bead is embedded in the epoxy resin, and a part of the lamp bead is located outside the epoxy resin as a light-emitting segment.

[0008] The beneficial effect of adopting the above further solution is that the lamp bead with connected wires and resistors can be filled with epoxy resin in the lamp bead shell to form an integral fault indicator light, which facilitates the connection between the lamp bead terminal and the wiring terminal.

[0009] Furthermore, the shell has an assembly cavity with two through ends, the assembly cavity is filled with epoxy resin, a limiting boss is provided on the outer wall of one end of the shell close to the light-emitting segment, an assembly hole is opened on the side wall of the box body, the shell is embedded in the assembly hole, and the limiting boss is sealed against the outer walls around the assembly hole.

[0010] The beneficial effect of adopting the above further solution is that the limiting boss is provided to achieve a sealed assembly between the outer shell and the assembly hole on the box body.

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

[0012] The beneficial effect of adopting the above further solution is that by providing a sealing gasket, the sealing effect between the fault indicator light and the box body is improved.

[0013] Furthermore, a plurality of bosses are fixed on the inner side surface of the bottom wall of the box body, each of the bosses is provided with a first threaded blind hole, the connecting terminals are fixed on the bosses by bolts engaging with the first threaded blind holes, and a corresponding connecting terminal is fixed on each of the bosses.

[0014] The beneficial effect of adopting the above further solution is that by providing the boss and the first threaded blind hole, a stable connection between the wiring terminal and the boss is facilitated.

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

[0016] The beneficial effect of adopting the above further solution is that by providing the second threaded blind hole, the box body and the mounting bracket can be fixedly connected conveniently.

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

[0018] The beneficial effect of adopting the above further solution is that the mounting bracket can be installed on the pipeline using a clamp to provide structural support for the electric heating power supply box.

[0019] Furthermore, an electric heating gland and a power supply gland are installed on the side wall of the box body.

[0020] The beneficial effect of adopting the above further solution is that by providing the electric heating gland and the power gland, it is convenient to install the electric heating and the power supply on the electric heating power supply box.

[0021] Furthermore, the box body includes a plurality of side walls, and the fault indicator light, the electric heating gland and the power supply gland are respectively located on three different side walls of the box body.

[0022] The beneficial effect of adopting the above further solution is to avoid interference between various components during installation and use.

[0023] An electric heating power supply device, comprising the above-mentioned electric heating power supply box with a fault indicator light, further comprising a local control circuit, an electric heating, and a power supply, wherein the live wire and the ground wire of the electric heating are respectively connected to two different wiring terminals among the remaining wiring terminals, the neutral wire of the electric heating and the neutral wire of the fault indicator light are connected to the same wiring terminal, and the power wires of the power supply are respectively connected to the various wiring terminals;

[0024] The local control circuit includes a circuit breaker, a circuit breaker auxiliary contact and a relay, 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 heating is located is connected in series with the circuit where the circuit breaker is located;

[0025] When the electric heating fails, the circuit breaker trips, causing the auxiliary contacts of the circuit breaker to close, the relay to be energized, and the fault indicator light to light up.

[0026] The beneficial effects of the present invention are as follows: in the electric heating power supply device of the present invention, the circuit where the fault indicator light is located is connected in series with the auxiliary contacts of the circuit breaker and the relay, the circuit where the electric heating is located is connected in series with the circuit where the circuit breaker is located, one end of the circuit breaker auxiliary contact (normally open contact) is connected to the positive pole of the power supply, and the other end is connected to the positive pole of the fault indicator light, the negative pole of the fault indicator light and the electric heating share the same negative pole, when the circuit breaker is in the closed state, the auxiliary contact is disconnected, and the indicator light is off; when the electric heating fails, the circuit breaker trips, the circuit breaker auxiliary contact closes, the fault indicator light is energized and lights up, indicating the fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the box structure of the electric heating power supply box with a fault indicator light of the present invention;

[0028] Figure 2 This is a schematic diagram of the cover structure of the electric heating power supply box with a fault indicator light of the present invention;

[0029] Figure 3 This is a schematic cross-sectional view of the electric heating power supply box with a fault indicator light of the present invention;

[0030] Figure 4 It is a schematic cross-sectional view of the fault indicator light of the present invention;

[0031] Figure 5 It is a schematic cross-sectional view of the assembled electric heating power supply box with a fault indicator light and a mounting bracket according to the present invention;

[0032] Figure 6 This is a schematic structural diagram of the mounting bracket of the present invention;

[0033] Figure 7 Schematic diagram of the circuit of the present invention.

[0034] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0035] 1. Box body; 11. Sealing ring; 12. Power gland; 13. Electric heating gland; 14. Boss;

[0036] 2. Lid;

[0037] 3. Fault indicator light; 31. Lamp beads; 32. Epoxy resin; 33. Wiring terminals; 34. Position limiting bosses; 35. Housing;

[0038] 4. Terminal blocks;

[0039] 5. Mounting bracket; 51. Mounting hole;

[0040] 6. Local control box; 61. Circuit breaker; 62. Circuit breaker auxiliary contacts; 63. Relay; 64. Relay contacts; 65. Contactor; 7. Electric heating. DETAILED DESCRIPTION

[0041] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0042] Example 1

[0043] like Figures 1 to 4 As shown, an electric heating 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 snapped onto the open end of the box body 1, and the fault indicator light 3 is embedded in the side wall of the box body 1; a plurality of wiring terminals 4 are fixed to the inner side surface of the bottom wall of the box body 1, and the live wire and the neutral wire of the fault indicator light 3 are respectively connected to two different wiring terminals 4.

[0044] The box body 1 and lid 2 of this embodiment can be injection molded from polyphenylene sulfide plastic (PPS). A sealing ring 11, specifically an O-ring, is mounted on one side of the box body 1. When the lid 2 is snapped onto the open end of the box body 1, it is sealed to the box body 1. The box body 1 and lid 2 can be fixed together using screws. The number of wiring terminals 4 can be adjusted as needed, and they can be fixed in the middle of the inner side of the bottom wall of the box body 1. The wiring terminals 4 can be fixed to the inner side of the bottom wall of the box body 1 using screws or other fixing methods, such as gluing.

[0045] The fault indicator light 3 of this embodiment can be a commonly used indicator light on the market.

[0046] In this embodiment, the box body 1 and the box cover 2 may both adopt a rectangular structure.

[0047] The electric heating power supply box with a fault indicator light in this embodiment is provided with a fault indicator light and a wiring terminal. The fault indicator light is embedded in the side wall of the box body and can cooperate with an external local control circuit to realize rapid fault identification and fault prompt.

[0048] Example 2

[0049] Based on Example 1, this embodiment provides a preferred solution for a fault indicator light 3. Figure 2 As shown, the fault indicator light 3 includes a lamp bead 31 and a housing 35. The housing 35 is filled with epoxy resin 32. The terminal 33 of the lamp bead 31 is embedded in the epoxy resin 32, and a portion of the lamp bead 31 is located outside the epoxy resin 32 as a light-emitting segment. The lamp bead with wires and resistors connected can be filled with epoxy resin in the lamp bead housing to form an integrated fault indicator light, which facilitates the connection of the lamp bead terminal to the terminal block.

[0050] Further, if Figure 2 As shown, the housing 35 has an assembly cavity with two through ends, which is filled with epoxy resin 32. A retaining boss 34 is provided on the outer wall of the end of the housing 35 near the light-emitting segment. The housing 35 is embedded in an assembly hole formed in the side wall of the box body 1, and the retaining boss 34 seals against the outer walls surrounding the assembly hole. The retaining boss ensures a tight seal between the housing 35 and the assembly hole in the box body 1. By embedding the housing 35 in the assembly hole, replacement and disassembly of the fault indicator light is facilitated.

[0051] Specifically, a sealing gasket is pressed between the limiting boss 34 and the outer side walls around the assembly hole. By providing the sealing gasket, the sealing effect between the fault indicator light and the box body is improved.

[0052] Example 3

[0053] Based on Example 1 or Example 2, this embodiment provides a preferred installation method for the connection terminal 4. Figure 1 and Figure 3 As shown, a plurality of bosses 14 are fixed to the inner side surface of the bottom wall of the box body 1. Each boss 14 has a first threaded blind hole. The terminal blocks 4 are fixed to the bosses 14 by bolts engaging with the first threaded blind holes. One terminal block 4 is fixed to each boss 14. The provision of the bosses and the first threaded blind holes facilitates a stable connection between the terminal blocks and the bosses.

[0054] The boss 14 of this embodiment may be in the shape of a cylindrical structure or a rectangular columnar structure.

[0055] Preferably, Figure 1As shown, four bosses 14 may be provided on the inner side surface of the bottom wall of the box body 1 of this embodiment, and a connection terminal 4 is provided on each boss 14 .

[0056] Example 4

[0057] Based on any of the above embodiments, this embodiment also provides an assembly method for the mounting bracket 5. Figure 5 and Figure 6 As shown, the outer side of the bottom wall of the box body 1 is provided with a plurality of second threaded blind holes, which are arranged one-to-one with the plurality of bosses 14. The provision of the second threaded blind holes facilitates the secure connection between the box body and the mounting bracket. The first threaded blind holes and the second threaded blind holes are not connected to each other and can be coaxially arranged or staggered.

[0058] Furthermore, the electric heating power supply box with fault indicator light 3 of this embodiment can be used in conjunction with a mounting bracket 5, which is secured to the outer side of the bottom wall of the box body 1 via bolts engaging the second threaded blind hole. The mounting bracket can be mounted on the pipe using a clamp, providing structural support for the electric heating power supply box. The mounting bracket 5 has a mounting hole 51, which can be connected and secured with bolts by aligning the mounting hole 51 with the second threaded blind hole.

[0059] Example 5

[0060] In addition to any of the above embodiments, in this embodiment, an electric heating gland 13 and a power gland 12 are installed on the side walls of the box body 1. The provision of the electric heating gland and the power gland facilitates installation of the electric heating and power supply on the electric heating power supply box. The electric heating can enter the box body through the electric heating gland, and the power supply can enter the box body through the power gland.

[0061] More preferably, Figure 1 As shown, the box body 1 includes multiple side walls, and the fault indicator light 3, electric heating gland 13, and power gland 12 are located on three different side walls of the box body 1. This prevents interference between the components during installation and use. The box body 1 is preferably a rectangular box body with four side walls, and the electric heating gland 13 and power gland 12 are located on three different side walls of the rectangular box body.

[0062] Example 6

[0063] Based on any of the above embodiments, Figures 1 to 5 and Figure 7As shown, this embodiment provides an electric heating power supply device, including the above-mentioned electric heating power supply box with a fault indicator light, and also includes a local control circuit, an electric heating 7 and a power supply, the live wire and the ground wire of the electric heating 7 are respectively connected to two different wiring terminals 4 among the remaining wiring terminals 4, the neutral wire of the electric heating 7 and the neutral wire of the fault indicator light 3 are connected to the same wiring terminal 4, and the power wire of the power supply is respectively connected to each wiring terminal 4 to supply power to each electrical component; the local control circuit of this embodiment can be integrated in the local control box 6, as shown Figure 7 As shown, outgoing wire terminals are respectively extended from the side walls of the local control box 6 for electrical connection with the electric heating and the fault indicator light.

[0064] The local control circuit includes a circuit breaker 61, a circuit breaker auxiliary contact 62 and a relay 63. The circuit where the fault indicator light 3 is located is connected in series with the circuit breaker auxiliary contact 62 and the relay 63. The circuit where the electric heating 7 is located is connected in series with the circuit where the circuit breaker 61 is located. Specifically, Figure 7 As shown, the circuit where the circuit breaker 61 is located is further provided with a contactor 65 , and the circuit where the fault indicator light 3 is located is further provided with a relay contact 64 .

[0065] When the electric heating 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 light up.

[0066] In the electric heating power supply device of this embodiment, the circuit where the fault indicator light is located is connected in series with the auxiliary contacts of the circuit breaker and the relay. The circuit where the electric heating is located is connected in series with the circuit where the circuit breaker is located. This is equivalent to connecting one end of the circuit breaker auxiliary contact (normally open contact) to the positive pole of the power supply and the other end to the positive pole of the fault indicator light. The negative pole of the fault indicator light and the electric heating share the same negative pole. When the circuit breaker is in the closed state, the auxiliary contact is disconnected and the indicator light is off. When the electric heating fails, the circuit breaker trips, the auxiliary contact of the circuit breaker closes, and the fault indicator light is powered on and lights up, indicating the fault.

[0067] In the description of the present invention, it should be understood that the terms "bottom wall", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations 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 a limitation on the present invention.

[0068] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0069] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0070] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0071] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0072] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An electric heating power supply box with a fault indicator light, characterized in that: It includes a box body, a box cover and a fault indicator light. The box cover can be adapted to snap onto the open end of the box body, and the fault indicator light is embedded in 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 the live wire and neutral wire of the fault indicator light are respectively connected to two different wiring terminals.

2. The electric heating power supply box with a fault indicator light according to claim 1, characterized in that: The fault indicator light includes a lamp bead and a shell. The shell is filled with epoxy resin. The connection terminal of the lamp bead is embedded in the epoxy resin. A part of the lamp bead is located outside the epoxy resin as a light-emitting segment.

3. The electric heating power supply box with a fault indicator light according to claim 2, characterized in that: The shell has an assembly cavity with two through ends, and the assembly cavity is filled with epoxy resin. A limiting boss is provided on the outer wall of one end of the shell close to the light-emitting segment. An assembly hole is opened on the side wall of the box body, and the shell is embedded in the assembly hole. The limiting boss is sealed against the outer walls around the assembly hole.

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

5. The electric heating power supply box with a fault indicator light according to any one of claims 1 to 4, characterized in that: A plurality of bosses are fixed on the inner side surface of the bottom wall of the box body, each of which is provided with a first threaded blind hole. The connecting terminals are fixed on the bosses by bolts in cooperation with the first threaded blind holes, and one connecting terminal is fixed on each boss.

6. The electric heating power supply box with a fault indicator light according to claim 5, characterized in that: A plurality of second threaded blind holes are formed on the outer side surface of the bottom wall of the box body, and the plurality of second threaded blind holes are arranged in a one-to-one correspondence with the plurality of bosses.

7. The electric heating power supply box with a 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 through bolts that cooperate with the second threaded blind hole.

8. The electric heating power supply box with a fault indicator light according to any one of claims 1 to 4, characterized in that: An electric heating gland and a power supply gland are installed on the side wall of the box body.

9. The electric heating power supply box with a fault indicator light according to claim 8, characterized in that: The box body includes a plurality of side walls, and the fault indicator light, the electric heating gland and the power supply gland are respectively located on three different side walls of the box body.

10. An electric heating power supply device, characterized in that: An electric heating power supply box with a fault indicator light as claimed in any one of claims 1 to 9, further comprising a local control circuit, an electric heating and a power supply, wherein the live wire and the ground wire of the electric heating are respectively connected to two different wiring terminals among the remaining wiring terminals, the neutral wire of the electric heating and the neutral wire of the fault indicator light are connected to the same wiring terminal, and the power wires of the power supply are respectively connected to the various wiring terminals; The local control circuit includes a circuit breaker, a circuit breaker auxiliary contact and a relay, 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 heating is located is connected in series with the circuit where the circuit breaker is located; When the electric heating fails, the circuit breaker trips, causing the auxiliary contacts of the circuit breaker to close, the relay to be energized, and the fault indicator light to light up.

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