Composite apparatus heating tape control system

Abstract

The utility model relates to the technical field of combined electric appliances, in particular to a combined electric appliance heating tape control system. According to the system, a bus connecting pipe I, a bus connecting pipe II, a wire outlet side connecting pipe, a disconnecting link and a circuit breaker are all provided with heating belts, heating belt control loops are arranged in a partitioned mode according to the distance of the heating belts, and a heating belt connecting mode is set; each control loop is provided with a temperature sensor, a controller, a manual start-stop device and a heating tape input indicator light, the temperature sensor is connected with the controller, the controller and the heating tape input indicator light are connected in parallel into a heating tape power supply circuit, and the manual start-stop device and the controller are connected in parallel with a normally open contact in the power supply circuit. According to the utility model, starting and stopping of the heating belt can be automatically controlled according to outdoor temperature conditions; meanwhile, in order to control start and stop of the heating tape when the controller or the temperature sensor breaks down, a manual start and stop device is arranged. And the switching-in or switching-out state of the heating tape can be displayed in real time through a heating tape switching-in indicating lamp.

Description

Technical Field

[0001] The utility model relates to the technical field of combined electrical appliances, in particular to a combined electrical appliance heating belt control system. Background Art

[0002] GIS or HGIS equipment consists of circuit breakers, disconnectors, grounding switches, current transformers, voltage transformers, etc. The shell of each component is filled with insulating gas at a fixed pressure. At present, many GIS or HGIS equipment are built outdoors. The temperature in northern my country is relatively low in winter, which can easily liquefy the insulating gas inside the equipment, causing the equipment to alarm for low gas pressure, or even fail to operate normally. Therefore, it is necessary to wrap a heating belt on the outside of the GIS or HGIS equipment shell to heat and insulate the equipment to ensure that the insulating gas is not liquefied. Since there are many connecting pipes in GIS or HGIS equipment, if the layout of the heating belt and the design of the control scheme are unreasonable, the heating effect may be poor or the heating belt may be overheated locally. Moreover, if the number of control loops and the number of cable outlets are too large, it will cause great difficulties in the layout of electrical components and cable threading in the control cabinet. Summary of the invention

[0003] In order to solve the above problems, the utility model provides a combined electrical appliance heating belt arrangement and control scheme, by reasonably arranging the heating belts and setting heating belt control loops, the heating belt coverage is expanded and the cable lines are simplified.

[0004] The technical scheme of the utility model is as follows: a combined electrical heating belt control system, including I busbar connecting pipe, II busbar connecting pipe and outlet side connecting pipe, each group of connecting pipes includes A connecting pipe, B connecting pipe and C connecting pipe, each group of connecting pipes is provided with a knife switch, wherein A connecting pipe and C connecting pipe are respectively provided with A phase side extension pipe and C phase side extension pipe, A phase side extension pipe, B connecting pipe and C phase side extension pipe are connected to the casing through the casing connecting pipe; also includes three circuit breakers, the circuit breakers are connected to the outlet side connecting pipe through the circuit breaker connecting pipe; including

[0005] The first heating belt control loop is used to control the heating belt near the sleeve of the I busbar connecting pipe, wherein the heating belts corresponding to the same phase are connected to the power supply in parallel;

[0006] The second heating belt control circuit is used to control the heating belt near the sleeve of the busbar II connection pipe, wherein the heating belts corresponding to the same phase are connected to the power supply in parallel;

[0007] The third heating belt control circuit is used to control the heating belts at the positions of the knife switches of busbar connecting pipe I and busbar connecting pipe II. The three-phase heating belts of the same group of knife switches are connected to the power supply in parallel;

[0008] The fourth heating belt control circuit is used to control the heating belt at the position of the circuit breaker and the circuit breaker connecting pipe, the three-phase heating belt at the circuit breaker position is connected to the power supply in parallel, and the three-phase heating belt at the circuit breaker connecting pipe position is connected to the power supply in parallel;

[0009] The fifth heating belt control circuit is used to control the heating belt at the position of the knife switch on the outgoing line side, and the three-phase heating belt is connected to the power supply in parallel;

[0010] The sixth heating belt control circuit is used to control the heating belt at the position of the connecting pipe on the outlet side, wherein the heating belts corresponding to the same phase are connected to the power supply in parallel;

[0011] Each control circuit is respectively provided with a temperature sensor, a controller, a manual start-stop device and a heating belt input indicator light. The temperature sensor is connected to the controller. The controller and the heating belt input indicator light are connected in parallel to the heating belt power supply circuit. The heating belt control circuit is provided with a normally open contact controlled by the controller, and the manual start-stop device is connected in parallel to the normally open contact.

[0012] Furthermore, the first heating belt control circuit includes five heating belts installed on the three bushing connecting tubes of busbar I and the extension tubes on the A phase side and the C phase side, wherein the two heating belts corresponding to the A phase are connected in parallel to the power supply circuit, the two heating belts corresponding to the C phase are connected in parallel to the power supply circuit, and the one heating belt corresponding to the B phase is connected to the power supply circuit.

[0013] Furthermore, the second heating belt control circuit includes five heating belts installed on the three bushing connecting tubes of busbar II and the extension tubes on the A phase side and the C phase side. Among them, two heating belts corresponding to phase A are connected in parallel to the power supply circuit, two heating belts corresponding to phase C are connected in parallel to the power supply circuit, and one heating belt corresponding to phase B is connected to the power supply circuit.

[0014] Furthermore, the third heating belt control circuit includes three heating belts at the three-phase connection switch of bus I and three heating belts at the three-phase connection switch of bus II. Pot-type insulators are provided on both sides of the switch to separate independent air chambers. The three heating belts corresponding to the three-phase switch of bus I are connected in parallel to the power supply circuit, and the three heating belts corresponding to the three-phase switch of bus II are connected in parallel to the power supply circuit.

[0015] Furthermore, the fourth heating belt control circuit includes three heating belts installed at the three-phase circuit breaker and three heating belts at the three-phase circuit breaker connecting pipe. The heating belts of the three-phase circuit breaker are connected in parallel to the power supply circuit, and the three heating belts of the three-phase circuit breaker connecting pipe are connected in parallel to the power supply circuit.

[0016] Furthermore, the sixth heating belt control circuit includes two groups of heating belts installed on the three-phase outlet side connecting pipe, one group of heating belts on the outlet side sleeve connecting pipe, and two heating belts on the outlet side A phase extension pipe and the outlet side C phase extension pipe, wherein the heating belts corresponding to the A phase, B phase, and C phase are respectively connected in parallel and connected to the power supply circuit.

[0017] Furthermore, basin-type insulators are provided on both sides of the outgoing line side knife switch to separate it from other air chambers.

[0018] In view of the characteristics of GIS or HGIS equipment with many connecting pipes, the utility model sets heating belts and control circuits respectively according to the air chambers divided by each connecting pipe, ensuring that the heating belt can cover each air chamber to prevent poor heating effect of the heating belt or local overheating of the heating belt. At the same time, since the temperature and pressure values ​​of the insulating gas in the same air chamber are close, a control circuit can be shared, effectively reducing the number of control circuits. When setting the control circuit, the distance of the installation location of the heating belt is also considered, and different methods are used to connect the power supply. For heating belts with a long distance between the three phases, the same phase parallel connection is used for power supply; and for heating belts with a short distance between the three phases, cross-phase parallel connection is used for power supply, effectively reducing the number of control circuits and the number of cables entering the control cabinet.

[0019] The utility model is equipped with a controller and a temperature sensor in each control loop, which can automatically control the start and stop of the heating belt according to the outdoor temperature; at the same time, in order to control the start and stop of the heating belt when the controller or temperature sensor fails, a manual start and stop device is provided. The utility model can also display the start or stop status of the heating belt in real time through the heating belt start indicator light. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the front view of the utility model combined electrical appliance;

[0021] Figure 2 This is a top view of the utility model combined electrical appliance;

[0022] Figure 3 This is the circuit diagram of the first heating belt control loop of the utility model;

[0023] Figure 4 This is the circuit diagram of the second heating belt control loop of the utility model;

[0024] Figure 5 This is the circuit diagram of the third heating zone control loop of the utility model;

[0025] Figure 6 This is the circuit diagram of the fourth heating zone control loop of the utility model;

[0026] Figure 7 This is the circuit diagram of the fifth heating zone control loop of the utility model;

[0027] Figure 8 This is the circuit diagram of the sixth heating belt control loop of the utility model;

[0028] In the figure, 1, busbar bushing I, 2, busbar bushing connecting pipe I, 3, busbar bushing II, 4, busbar bushing connecting pipe II, 5, outgoing line side bushing, 6, outgoing line side bushing connecting pipe, 7, circuit breaker, 8, circuit breaker connecting pipe, 9, busbar I A phase side extension pipe, 10, busbar I C phase side extension pipe, 11, busbar II A phase side extension pipe, 12, busbar II C phase side extension pipe, 13, outgoing line side A phase side extension pipe, 14, outgoing line side C phase side Extension pipe, 15, connecting pipe for busbar I A, 16, connecting pipe for busbar I, 17, basin-type insulator, 18, connecting pipe for busbar II A, 20, connecting pipe for busbar I B, 21, connecting pipe for busbar I C, 22, knife switch on outgoing line side, 23, connecting pipe on outgoing line side A, 24, connecting pipe on outgoing line side B, 25, connecting pipe on outgoing line side C, 26, connecting pipe on busbar II B, 27, connecting pipe on busbar II C. DETAILED DESCRIPTION

[0029] The structure of the utility model is described in detail below with reference to the accompanying drawings.

[0030] A combined electrical heating belt control system, such as Figure 1 , 2 As shown, it includes busbar I connecting pipe, busbar II connecting pipe and outgoing line side connecting pipe. Busbar I connecting pipe includes busbar I A connecting pipe 15, busbar I B connecting pipe 20, busbar I C connecting pipe 21, each connecting pipe is equipped with busbar I knife switch 16, and the two sides of busbar I knife switch 16 are separated by pot insulator 17. Busbar I A phase side extension pipe 9 is provided on the side of the end of busbar I A connecting pipe 15, and busbar I C side extension pipe 10 is provided on the side of the end of busbar I C connecting pipe 21. The ends of busbar I A phase side extension pipe, busbar I B connecting pipe and busbar I C side extension pipe are connected to busbar I bushing 1 through busbar I bushing connecting pipe 2. Heating belts are installed on busbar I knife switch, busbar I A phase side extension pipe, busbar I C side extension pipe and busbar I bushing connecting pipe.

[0031] The busbar II connecting pipe includes a busbar II A connecting pipe 19, a busbar II B connecting pipe 26, and a busbar II C connecting pipe 27. Each connecting pipe is equipped with a busbar II knife switch 18, and the two sides of the busbar II knife switch 18 are separated by a pot-type insulator 17. The side of the end of the busbar II A connecting pipe 19 is provided with a busbar II A phase side extension pipe 11, and the side of the end of the busbar II C connecting pipe 27 is provided with a busbar II C phase side extension pipe 12. The ends of the busbar II A phase side extension pipe, the busbar II B connecting pipe, and the busbar II C phase side extension pipe are connected to the busbar II bushing 3 through the busbar II bushing connecting pipe 4. The busbar II knife switch, the busbar II A phase side extension pipe, the busbar II C side extension pipe, and the busbar II bushing connecting pipe are all equipped with heating belts.

[0032] The outgoing line side connecting pipe includes an outgoing line side A connecting pipe 23, an outgoing line side B connecting pipe 24 and an outgoing line side C connecting pipe 25. The three connecting pipes are all provided with an outgoing line side knife switch 22, and the two sides of the outgoing line side knife switch 22 are separated by a pot-type insulator 17. An outgoing line side A phase side extension pipe 13 is provided on the side of the end of the outgoing line side A connecting pipe 23, and an outgoing line side C phase side extension pipe 14 is provided on the side of the end of the outgoing line side C connecting pipe 25. The ends of the outgoing line side A phase side extension pipe, the outgoing line side B connecting pipe and the outgoing line side C side extension pipe are connected to the outgoing line side bushing 5 through the outgoing line bushing connecting pipe 6. A heating belt is installed on the outgoing line side knife switch, the outgoing line side A phase side extension pipe, the outgoing line side C side extension pipe and the outgoing line bushing connecting pipe.

[0033] The control system further includes three circuit breakers 7 corresponding to the connected pipes, one end of the three circuit breakers is respectively connected between the I bus connection pipe and the II bus connection pipe of each phase, and the other end is connected to the outgoing line side connection pipe through the circuit breaker connection pipe 8. A heating belt is installed on the circuit breaker and the circuit breaker connection pipe.

[0034] like Figure 3-8 As shown, the control system divides the control loop according to the separated air chambers, and controls the start and stop of the heating belts at each position and indicates the input status of the heating belts.

[0035] like Figure 3 As shown, the first heating belt control circuit is used to control the heating belt near the I busbar connecting pipe sleeve, including two heating belts 2A and 2C installed on the I busbar A phase side extension pipe and the I busbar C phase side extension pipe, and three heating belts 1A, 1B, and 1C on the three-phase I busbar sleeve connecting pipe, wherein the two ends of the heating belts 1A and 2A are first connected in parallel, and the two ends of the heating belts 1C and 3C are first connected in parallel, and then connected to the power supply circuit with the heating belt 1B through cables. The control circuit also includes a power supply air switch K1, a controller WK1, a temperature sensor TC1, a manual start-stop device SK1, and a heating belt input indicator HJ1. The temperature sensor TC1 is connected to the controller WK1, and the power supply air switch K1, the controller WK1, and the heating belt input indicator HJ1 are connected in parallel to the heating belt power supply circuit. A normally open contact controlled by the controller is provided in the heating belt control circuit, and the manual start-stop device SK1 is connected in parallel to the normally open contact.

[0036] like Figure 4As shown, the second heating belt control circuit is used to control the heating belt near the II busbar connecting pipe sleeve, including two heating belts 4A and 4C installed on the II busbar A phase side extension pipe and the II busbar C phase side extension pipe, and three heating belts 3A, 3B, and 3C on the three-phase II busbar sleeve connecting pipe, wherein the two ends of the heating belts 3A and 4A are first connected in parallel, and the two ends of the heating belts 3C and 4C are first connected in parallel, and then connected to the power supply circuit with the heating belt 3B through cables. The other parts of the control circuit are arranged in the same structure as the first heating belt control circuit, and will not be repeated.

[0037] like Figure 5 As shown, the third heating belt control circuit is used to control the heating belts at the knife switch positions of the I busbar connecting pipe and the II busbar connecting pipe. It includes heating belts 5A, 5B, 5C installed at the three-phase I busbar knife switch position and heating belts 6A, 6B, 6C installed at the three-phase II busbar knife switch position. The heating belts 5A, 5B, 5C and the heating belts 6A, 6B, 6C are first connected in parallel, and then the two ends are connected to the power supply circuit through cables. The other parts of the control circuit are arranged in the same structure as the first heating belt control circuit, and will not be repeated.

[0038] like Figure 6 As shown, the fourth heating belt control circuit is used to control the heating belts at the positions of the circuit breaker and the circuit breaker connecting pipe. It includes three heating belts 7A, 7B, 7C installed at the three-phase circuit breaker and three heating belts 8A, 8B, 8C at the three-phase circuit breaker connecting pipe. The heating belts 7A, 7B, 7C of the three-phase circuit breaker are first connected in parallel and then connected to the power supply circuit through cables. The three heating belts 8A, 8B, 8C of the three-phase circuit breaker connecting pipe are first connected in parallel and then connected to the power supply circuit through cables. The other parts of the control circuit are arranged in the same structure as the first heating belt control circuit, which will not be repeated.

[0039] like Figure 7 As shown, the fifth heating belt control circuit is used to control the heating belt at the knife switch position on the outgoing line side. It includes heating belts 9A, 9B, and 9C installed at the knife switch position on the three-phase outgoing line side. The three heating belts are first connected in parallel and then connected to the power supply circuit through cables. The other parts of the control circuit are arranged in the same structure as the first heating belt control circuit, and will not be repeated.

[0040] like Figure 8As shown, the sixth heating belt control circuit is used to control the heating belt at the position of the outlet side connecting pipe. It includes six heating belts 10A, 10B, 10C, 11A, 11B, 11C installed on the three-phase outlet side connecting pipe, three heating belts 13A, 13B, 13C on the outlet side casing connecting pipe, and two heating belts 12A, 12C on the outlet side A phase side extension pipe and the outlet side C phase side extension pipe, wherein the heating belts of the same phase are first connected together, and then connected to the power supply circuit through a cable, that is, the heating belts 10A, 11A, 12A, 13A are connected in parallel, the heating belts 10B, 11B, 13B are connected in parallel, and the heating belts 10C, 11C, 12C, 13C are connected in parallel. The other parts of the control circuit are arranged in the same structure as the first heating belt control circuit, and will not be repeated.

[0041] During use, the temperature sensors of each control circuit monitor the ambient temperature in real time and send it to their respective controllers. When the ambient temperature is lower than the start setting value of the heating belt, each heating belt control circuit is automatically connected, the heating belt works, and heats the shell; when the ambient temperature is higher than the stop setting value of the heating belt, the control circuit is automatically disconnected and the heating stops. The heating belt input indicator lights on each circuit display the on-off status of each control circuit in real time. If the ambient temperature is lower than the set value, but the heating belt input indicator light is not on, indicating that the heating belt control circuit is not connected, it is considered that the temperature sensor or controller is faulty, and the heating belt control circuit can be forced to connect through the manual start-stop device.

Claims

1. A control system for a combined electrical heating belt, comprising a busbar connecting pipe I, a busbar connecting pipe II and an outlet side connecting pipe, each group of connecting pipes comprises an A connecting pipe, a B connecting pipe and a C connecting pipe, each group of connecting pipes is provided with a knife switch, wherein the A connecting pipe and the C connecting pipe are provided with an A phase side extension pipe and a C phase side extension pipe respectively, and the A phase side extension pipe, the B connecting pipe and the C phase side extension pipe are connected to the casing through a casing connecting pipe; further comprising three circuit breakers, the circuit breakers being connected to the outlet side connecting pipe through the circuit breaker connecting pipe; characterized in that: include The first heating belt control loop is used to control the heating belt near the sleeve of the I busbar connecting pipe, wherein the heating belts corresponding to the same phase are connected to the power supply in parallel; The second heating belt control circuit is used to control the heating belt near the sleeve of the busbar II connection pipe, wherein the heating belts corresponding to the same phase are connected to the power supply in parallel; The third heating belt control circuit is used to control the heating belts at the positions of the knife switches of busbar connecting pipe I and busbar connecting pipe II. The three-phase heating belts of the same group of knife switches are connected to the power supply in parallel; The fourth heating belt control circuit is used to control the heating belt at the position of the circuit breaker and the circuit breaker connecting pipe, the three-phase heating belt at the circuit breaker position is connected to the power supply in parallel, and the three-phase heating belt at the circuit breaker connecting pipe position is connected to the power supply in parallel; The fifth heating belt control circuit is used to control the heating belt at the position of the knife switch on the outgoing line side, and the three-phase heating belt is connected to the power supply in parallel; The sixth heating belt control circuit is used to control the heating belt at the position of the connecting pipe on the outlet side, wherein the heating belts corresponding to the same phase are connected to the power supply in parallel; Each control circuit is respectively provided with a temperature sensor, a controller, a manual start-stop device and a heating belt input indicator light. The temperature sensor is connected to the controller. The controller and the heating belt input indicator light are connected in parallel to the heating belt power supply circuit. The heating belt control circuit is provided with a normally open contact controlled by the controller, and the manual start-stop device is connected in parallel to the normally open contact.

2. The combined electrical appliance heating zone control system according to claim 1, characterized in that: The first heating belt control circuit includes five heating belts installed on the three bushing connecting tubes of busbar I and the extension tubes on the A phase side and the C phase side. Two heating belts corresponding to phase A are connected in parallel to the power supply circuit, two heating belts corresponding to phase C are connected in parallel to the power supply circuit, and one heating belt corresponding to phase B is connected to the power supply circuit.

3. The combined electrical appliance heating zone control system according to claim 1, characterized in that: The second heating belt control circuit includes five heating belts installed on the three bushing connecting tubes of busbar II and the extension tubes on the A phase side and the C phase side. Among them, two heating belts corresponding to phase A are connected in parallel to the power supply circuit, two heating belts corresponding to phase C are connected in parallel to the power supply circuit, and one heating belt corresponding to phase B is connected to the power supply circuit.

4. The combined electrical appliance heating zone control system according to claim 1, characterized in that: The third heating belt control circuit includes three heating belts at the three-phase connection switch of bus I and three heating belts at the three-phase connection switch of bus II. Pot-type insulators are provided on both sides of the switch to separate independent air chambers. The three heating belts corresponding to the three-phase switch of bus I are connected in parallel to the power supply circuit, and the three heating belts corresponding to the three-phase switch of bus II are connected in parallel to the power supply circuit.

5. The combined electrical appliance heating zone control system according to claim 1, characterized in that: The fourth heating belt control circuit includes three heating belts installed at the three-phase circuit breaker and three heating belts at the three-phase circuit breaker connecting pipe. The heating belts of the three-phase circuit breaker are connected in parallel to the power supply circuit, and the three heating belts of the three-phase circuit breaker connecting pipe are connected in parallel to the power supply circuit.

6. The combined electrical appliance heating zone control system according to claim 1, characterized in that: The sixth heating belt control circuit includes two groups of heating belts installed on the three-phase outlet side connecting pipe, one group of heating belts on the outlet side sleeve connecting pipe, and two heating belts on the outlet side A phase extension pipe and the outlet side C phase extension pipe, wherein the heating belts corresponding to the A phase, B phase, and C phase are respectively connected in parallel and connected to the power supply circuit.

7. The combined electrical appliance heating zone control system according to claim 1, characterized in that: The outgoing line side knife switch is provided with pot-type insulators on both sides to separate from other air chambers.

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