Axial flow fan control circuit in fire-fighting linkage with high-voltage distribution room of transformer substation

Abstract

The utility model relates to the technical field of power equipment, in particular to an axial flow fan control circuit in fire-fighting linkage with a high-voltage distribution room of a transformer substation. Comprising a main inlet wire, and a fan control loop, a fan motor loop and a shunt release loop are connected in parallel on the main inlet wire; the fan control loop comprises an exhaust control loop and a smoke exhaust control loop which are connected in parallel; the fan motor loop comprises an on-off switch and a fan which are connected in series; the on-off switch comprises a smoke exhaust loop contactor normally open contact and an exhaust loop contactor normally open contact which are connected in parallel; the shunt release loop is provided with a fire alarm contact and a shunt release which are connected in series. According to the utility model, by arranging the fire alarm contact, the exhaust button and the smoke exhaust button, when the fire alarm system detects that a fire occurs in the distribution room, the shunt release is electrified and the third air switch is switched off, so that the fan motor loop is closed, the fan does not work, gas exchange is avoided, and the fire range can be effectively prevented from being rapidly expanded.

Description

Technical Field

[0001] The utility model relates to the technology in the field of electric power equipment, in particular to an axial flow fan control circuit linked with the fire protection of a high-voltage distribution room in a transformer substation. Background Art

[0002] Currently, if Figure 1 As shown, the substation mainly includes a distribution room 1, and a fan 3 for exhaust is arranged in the distribution room 1. The fan includes an upper fan and a lower fan. The upper fan and the lower fan are arranged diagonally on the inner wall of the distribution room. A control box 2 is arranged on the outer wall of the distribution room. During the daily operation of the substation, a variety of factors may cause a fire in the distribution room. When a fire occurs in a traditional distribution room, if the fan happens to be running, it will accelerate the air circulation, causing the fire to spread rapidly, resulting in a rapid expansion of the scope of the accident. Similarly, if the switch cabinet in the high-voltage distribution room is filled with SF6 gas, there is a possibility of SF6 gas leakage. If the SF6 gas leaked in the high-voltage distribution room cannot be discharged outdoors in time, people who mistakenly enter the high-voltage distribution room are prone to SF6 gas poisoning, so it is necessary to use a fan to discharge the SF6 gas. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an axial flow fan control circuit linked with the fire protection of the high-voltage distribution room of the substation, which is used to reasonably regulate the opening and closing of the fan when a fire occurs in the distribution room or SF6 gas leaks.

[0004] The technical solution adopted by the utility model to solve the technical problem is an axial flow fan control circuit linked with the fire protection of the high-voltage distribution room of the substation, including a main incoming line, a first air switch is arranged on the main incoming line, and a fan control circuit, a fan motor circuit and a shunt release circuit are connected in parallel on the main incoming line;

[0005] The fan control circuit is provided with a second air switch, the fan control circuit includes an exhaust control circuit and a smoke exhaust control circuit connected in parallel; the exhaust control circuit includes an exhaust button and an exhaust circuit contactor connected in series; the smoke exhaust control circuit includes a smoke exhaust button and a smoke exhaust circuit contactor connected in series;

[0006] A third air switch is provided on the fan motor circuit, the fan motor circuit includes an on-off switch and a fan connected in series, and the on-off switch includes a normally open contact of a smoke exhaust circuit contactor and a normally open contact of an exhaust circuit contactor connected in parallel;

[0007] A fourth air switch is provided on the shunt release circuit, the shunt release circuit comprises a fire alarm contact and a shunt release connected in series, the shunt release is mechanically connected to the third air switch, and when the shunt release is energized, the third air switch is disconnected;

[0008] The smoke exhaust circuit contactor is mechanically connected to the normally open contact of the smoke exhaust circuit contactor, and the smoke exhaust circuit contactor and the normally open contact of the smoke exhaust circuit contactor are closed or opened synchronously; the exhaust circuit contactor is mechanically connected to the normally open contact of the exhaust circuit contactor, and the exhaust circuit contactor and the normally open contact of the exhaust circuit contactor are closed or opened synchronously.

[0009] Furthermore, the exhaust control circuit is connected in series with a normally closed contact of a smoke exhaust circuit contactor, the smoke exhaust control circuit is connected in series with a normally closed contact of an exhaust circuit contactor, the smoke exhaust circuit contactor is mechanically connected to the normally closed contact of the smoke exhaust circuit contactor, and the smoke exhaust circuit contactor and the normally closed contact of the smoke exhaust circuit contactor are asynchronously closed or disconnected; the exhaust circuit contactor is mechanically connected to the normally closed contact of the exhaust circuit contactor, and the exhaust circuit contactor and the normally closed contact of the exhaust circuit contactor are asynchronously closed or disconnected.

[0010] Furthermore, a gas linkage alarm contact connected in parallel with the exhaust button is provided on the exhaust control circuit.

[0011] Furthermore, the gas linkage alarm contact is a SF6 gas linkage alarm contact.

[0012] Furthermore, the smoke exhaust control circuit is provided with a smoke detection contact connected in parallel with the smoke exhaust button.

[0013] Furthermore, a normally open auxiliary contact of a third air switch is connected in series to the shunt release circuit, and the normally open auxiliary contact of the third air switch is closed or opened synchronously with the third air switch.

[0014] Furthermore, the fan includes a top fan and a bottom fan connected in parallel, the normally open contacts of the smoke exhaust circuit contactor are respectively electrically connected to the forward transfer contacts of the top fan and the reverse transfer contacts of the bottom fan, and the normally open contacts of the exhaust circuit contactor are respectively electrically connected to the reverse transfer contacts of the top fan and the forward transfer contacts of the bottom fan.

[0015] Furthermore, the number of the top fans and the number of the bottom fans are at least 3 respectively.

[0016] The beneficial effects of the utility model are as follows: by setting fire alarm contacts, exhaust buttons and smoke exhaust buttons, when the fire alarm system detects a fire in the distribution room, the fire alarm contacts are closed, the shunt release is energized and the third air switch is controlled to be disconnected, the fan motor circuit is closed, the fan does not work, gas exchange is avoided, and the rapid expansion of the fire range can be effectively avoided; when the fire is extinguished, the shunt release loses power and controls the third air switch to be closed, thick smoke will exist in the distribution room, the smoke exhaust button is pressed, the smoke exhaust circuit contactor is energized, the normally open contact of the smoke exhaust circuit contactor is closed, and the fan starts working to blow out the thick smoke in the distribution room; when SF6 gas leaks in the switch cabinet, the exhaust button is pressed, the exhaust circuit contactor is energized, the normally open contact of the exhaust circuit contactor is closed, and the fan starts working to blow out the SF6 gas in the distribution room. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the prior art;

[0018] Figure 2 It is a structural schematic diagram of the utility model;

[0019] Figure numerals: 1-distribution room; 2-control box; 3-fan; 301-bottom fan forward contact; 302-bottom fan reverse contact; 303-top fan forward contact; 304-top fan reverse contact; 4-main incoming line; 5-first air switch; 6-fan control circuit; 601-second air switch; 7-fan motor circuit; 701-third air switch; 702-exhaust circuit contactor normally open contact; 703 exhaust circuit contactor normally open contact; 8-shunt release circuit Circuit; 801-fourth air switch; 802-fire alarm contact; 803-shunt release; 804-normally open auxiliary contact of the third air switch; 9-exhaust control circuit; 901-exhaust button; 902-exhaust circuit contactor; 903-smoke exhaust circuit contactor normally closed contact; 904-gas linkage alarm contact; 10-smoke exhaust control circuit; 101-smoke exhaust button; 102-smoke exhaust circuit contactor; 103-exhaust circuit contactor normally closed contact; 104-smoke detection contact. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] like Figure 2As shown, the utility model is an axial flow fan control circuit linked with the fire protection of the high-voltage distribution room of the substation, comprising a main incoming line 4, a first air switch 5 is arranged on the main incoming line 4, and a fan control circuit 6, a fan motor circuit 7 and a shunt release circuit 8 are connected in parallel on the main incoming line 4;

[0022] A second air switch 601 is provided on the fan control circuit 6, and the fan control circuit 6 includes an exhaust control circuit 9 and a smoke exhaust control circuit 10 connected in parallel; the exhaust control circuit 9 includes an exhaust button 901 and an exhaust circuit contactor 902 connected in series; the smoke exhaust control circuit 10 includes a smoke exhaust button 101 and a smoke exhaust circuit contactor 102 connected in series; the exhaust button 901 and the smoke exhaust button 101 are essentially a switch, when the exhaust button 901 is pressed, the light source in the exhaust button 901 illuminates, and the exhaust control circuit 9 is connected, press the exhaust button 901 again, the light source in the exhaust button 901 goes out, and the exhaust control circuit 9 is disconnected; when the smoke exhaust button 101 is pressed, the light source in the smoke exhaust button 101 illuminates, and the smoke exhaust control circuit 10 is connected, press the smoke exhaust button 101 again, the light source in the smoke exhaust button 101 goes out, and the smoke exhaust control circuit 10 is disconnected.

[0023] The fan motor circuit 7 is provided with a third air switch 701, and the fan motor circuit 7 includes an on-off switch and a fan 3 connected in series, and the on-off switch includes a smoke exhaust circuit contactor normally open contact 703 and an exhaust circuit contactor normally open contact 702 connected in parallel; when the third air switch 701 is closed, the smoke exhaust circuit contactor 102 is mechanically connected to the smoke exhaust circuit contactor normally open contact 703, and essentially the smoke exhaust circuit contactor 102 and the smoke exhaust circuit contactor normally open contact 703 are a component, and when in use, the smoke exhaust circuit contactor 102 and the smoke exhaust circuit contactor normally open contact 703 are synchronously closed or disconnected, that is, after the smoke exhaust circuit contactor 102 is energized, the smoke exhaust circuit contactor normally open contact 703 is closed, so that the fan Machine 3 starts working; after the smoke exhaust circuit contactor 102 loses power, the normally open contact 703 of the smoke exhaust circuit contactor will be disconnected, and the fan 3 stops working; the exhaust circuit contactor 902 is mechanically connected with the exhaust circuit contactor normally open contact 702. In essence, the exhaust circuit contactor 902 and the exhaust circuit contactor normally open contact 702 are a component. When in use, the exhaust circuit contactor 902 and the exhaust circuit contactor normally open contact 702 are closed or disconnected synchronously; that is, after the exhaust circuit contactor 902 is energized, the normally open contact 702 of the exhaust circuit contactor will be closed, and the fan 3 starts working; after the exhaust circuit contactor 902 loses power, the normally open contact 702 of the exhaust circuit contactor will be disconnected, and the fan 3 stops working.

[0024] A fourth air switch 801 is provided on the shunt release circuit 8, and the shunt release circuit 8 includes a fire alarm contact 802 and a shunt release 803 connected in series, and the shunt release 803 is mechanically connected to the third air switch 701; when the shunt release 803 is energized, the third air switch 701 is disconnected. When a fire occurs, the fire alarm contact 802 is closed to energize the shunt release 803. When the shunt release 803 is energized, the third air switch 701 is controlled to be disconnected, so that the fan 3 does not work, avoiding gas exchange in the distribution room, which can effectively prevent the rapid expansion of the fire range. When the fire is extinguished, the fire alarm contact 802 is disconnected, and the third air switch 701 is manually closed.

[0025] In order to avoid interference caused by pressing the smoke exhaust button 101 and the exhaust button 901 at the same time, which results in the smoke exhaust circuit contactor normally open contact 703 and the exhaust circuit contactor normally open contact 702 being closed at the same time, further see Figure 2 The exhaust control circuit 9 is connected in series with a normally closed contact 903 of the smoke exhaust circuit contactor, the smoke exhaust control circuit 10 is connected in series with a normally closed contact 103 of the exhaust circuit contactor, the smoke exhaust circuit contactor 102 is mechanically connected to the normally closed contact 903 of the smoke exhaust circuit contactor, and the smoke exhaust circuit contactor 102 and the normally closed contact 903 of the smoke exhaust circuit contactor are asynchronously closed or disconnected; the exhaust circuit contactor 902 is mechanically connected to the normally closed contact 103 of the exhaust circuit contactor, and the exhaust circuit contactor 902 and the normally closed contact 103 of the exhaust circuit contactor are asynchronously closed or disconnected. Essentially, the smoke exhaust circuit contactor 102, the smoke exhaust circuit contactor normally closed contact 903 and the smoke exhaust circuit contactor normally open contact 703 are one component, and the smoke exhaust circuit contactor 102 and the smoke exhaust circuit contactor normally closed contact 903 are asynchronously closed or disconnected, which means that when the smoke exhaust circuit contactor 102 is energized, the smoke exhaust circuit contactor 102 will disconnect the smoke exhaust circuit contactor normally closed contact 903, and at the same time close the smoke exhaust circuit contactor normally open contact 703, so that the exhaust control circuit 9 is disconnected and the fan 3 starts to work; In essence, the exhaust circuit contactor 902, the exhaust circuit contactor normally closed contact 103 and the exhaust circuit contactor normally open contact 702 are one component, and the exhaust circuit contactor 902 and the exhaust circuit contactor normally closed contact 103 are asynchronously closed or disconnected, which means that when the exhaust circuit contactor 902 is energized, the exhaust circuit contactor 902 disconnects the exhaust circuit contactor normally closed contact 103 and closes the exhaust circuit contactor normally open contact 702, disconnecting the smoke exhaust control circuit 10 and starting the fan 3. This arrangement allows the exhaust control circuit 9 and the smoke exhaust control circuit 10 to work only one at a time, avoiding interference between the two circuits.

[0026] To achieve intelligent control, see Figure 2The exhaust control circuit 9 is provided with a gas linkage alarm contact 904 connected in parallel with the exhaust button 901. The gas linkage alarm contact 904 can detect whether SF6 gas is generated in the power distribution room. If SF6 gas is generated, the gas linkage alarm contact 904 is closed to connect the exhaust control circuit 9. Further, the gas linkage alarm contact 904 is an SF6 gas linkage alarm contact.

[0027] For further information, see Figure 2 The smoke exhaust control circuit 10 is provided with a smoke detection contact 104 connected in parallel with the smoke exhaust button 101. The smoke detection contact 104 can detect whether thick smoke is generated in the power distribution room. If thick smoke is generated, the smoke detection contact 104 is closed to connect the smoke exhaust control circuit 10.

[0028] In order to prevent the shunt release 803 from working for a long time, see Figure 2 The shunt release circuit 8 is connected in series with a third air switch normally open auxiliary contact 804, which is closed or opened synchronously with the third air switch 701. When the third air switch 701 is opened, the third air switch normally open auxiliary contact 804 is opened synchronously, causing the shunt release 803 to lose power.

[0029] Furthermore, the fan 3 includes a top fan and a bottom fan connected in parallel, the smoke exhaust circuit contactor normally open contact 703 is electrically connected to the top fan forward transfer contact 303 and the bottom fan reverse transfer contact 302, respectively, and the exhaust circuit contactor normally open contact 702 is electrically connected to the top fan reverse transfer contact 304 and the bottom fan forward transfer contact 301, respectively. When thick smoke is generated in the distribution room, the normally open contact 703 of the smoke exhaust circuit contactor is closed. Since the density of thick smoke is smaller than that of air, the thick smoke is located at the top of the distribution room. After the top fan forward transfer contact 303 and the bottom fan reverse transfer contact 302 are energized, the top fan rotates forward to exhaust and the bottom fan reverses to inhale, so that the thick smoke can be discharged from the distribution room in time; when SF6 gas is generated in the distribution room, the normally open contact 702 of the exhaust circuit contactor is closed. Since the density of SF6 gas is greater than that of air, the SF6 gas is located at the bottom of the distribution room. After the top fan reverse transfer contact 304 and the bottom fan forward transfer contact 301 are energized, the top fan reverses to inhale and the bottom fan rotates forward to exhaust, so that the SF6 gas can be discharged from the distribution room in time.

[0030] Furthermore, the number of the top fans and the number of the bottom fans are at least 3 respectively.

[0031] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An axial flow fan control circuit linked with the fire protection of a high-voltage distribution room in a substation, comprising a main incoming line (4), a first air switch (5) being arranged on the main incoming line (4), characterized in that: The main incoming line (4) is connected in parallel with a fan control circuit (6), a fan motor circuit (7) and a shunt release circuit (8); The fan control circuit (6) is provided with a second air switch (601), and the fan control circuit (6) comprises an exhaust control circuit (9) and a smoke exhaust control circuit (10) connected in parallel; the exhaust control circuit (9) comprises an exhaust button (901) and an exhaust circuit contactor (902) connected in series; the smoke exhaust control circuit (10) comprises a smoke exhaust button (101) and a smoke exhaust circuit contactor (102) connected in series; The fan motor circuit (7) is provided with a third air switch (701), the fan motor circuit (7) comprises an on-off switch and a fan (3) connected in series, the on-off switch comprises a smoke exhaust circuit contactor normally open contact (703) and an exhaust circuit contactor normally open contact (702) connected in parallel; The shunt release circuit (8) is provided with a fourth air switch (801), the shunt release circuit (8) comprises a fire alarm contact (802) and a shunt release (803) connected in series, the shunt release (803) is mechanically connected to the third air switch (701), and when the shunt release (803) is energized, the third air switch (701) is disconnected; The smoke exhaust circuit contactor (102) is mechanically connected to the normally open contact (703) of the smoke exhaust circuit contactor, and the smoke exhaust circuit contactor (102) and the normally open contact (703) of the smoke exhaust circuit contactor are closed or opened synchronously; the exhaust circuit contactor (902) is mechanically connected to the normally open contact (702) of the exhaust circuit contactor, and the exhaust circuit contactor (902) and the normally open contact (702) of the exhaust circuit contactor are closed or opened synchronously.

2. The axial flow fan control circuit linked with the fire protection of the high voltage distribution room of the substation according to claim 1, characterized in that: The exhaust control circuit (9) is connected in series with a normally closed contact (903) of a smoke exhaust circuit contactor, the exhaust control circuit (10) is connected in series with a normally closed contact (103) of an exhaust circuit contactor, the exhaust circuit contactor (102) is mechanically connected to the normally closed contact (903) of the smoke exhaust circuit contactor, and the exhaust circuit contactor (102) and the normally closed contact (903) of the smoke exhaust circuit contactor are asynchronously closed or disconnected; the exhaust circuit contactor (902) and the normally closed contact (103) of the exhaust circuit contactor are mechanically connected, and the exhaust circuit contactor (902) and the normally closed contact (103) of the exhaust circuit contactor are asynchronously closed or disconnected.

3. The axial flow fan control circuit linked with the fire protection of the high voltage distribution room of the substation according to claim 1, characterized in that: The exhaust control circuit (9) is provided with a gas linkage alarm contact (904) connected in parallel with the exhaust button (901).

4. The axial flow fan control circuit linked with the fire protection of the high voltage distribution room of the substation as claimed in claim 3, characterized in that: The gas linkage alarm contact (904) is a SF6 gas linkage alarm contact.

5. The axial flow fan control circuit linked with the fire protection of the high voltage distribution room of the substation according to claim 1, characterized in that: The smoke exhaust control circuit (10) is provided with a smoke detection contact (104) connected in parallel with the smoke exhaust button (101).

6. The axial flow fan control circuit linked with the fire protection of the high voltage distribution room of the substation as claimed in claim 1, characterized in that: A third air switch normally open auxiliary contact (804) is connected in series to the shunt release circuit (8), and the third air switch normally open auxiliary contact (804) is closed or opened synchronously with the third air switch (701).

7. The axial flow fan control circuit linked with the fire protection of the high voltage distribution room of the substation according to claim 1, characterized in that: The fan (3) comprises a top fan and a bottom fan connected in parallel, the normally open contact (703) of the smoke exhaust circuit contactor is electrically connected to the top fan forward transfer contact (303) and the bottom fan reverse transfer contact (302) respectively, and the normally open contact (702) of the exhaust circuit contactor is electrically connected to the top fan reverse transfer contact (304) and the bottom fan forward transfer contact (301) respectively.

8. An axial flow fan control circuit linked to the fire protection of the high voltage distribution room of a substation as claimed in claim 7, characterized in that: The number of the top fans and the number of the bottom fans are at least 3 respectively.

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