Interlocking smoke exhaust fan control device of gas detector

Abstract

The utility model discloses a gas detector interlocking smoke exhaust fan control device which comprises a detection control box, an axial flow fan and a protection box, and the detection control box and the axial flow fan are both electrically connected with the inside of the protection box. According to the utility model, the power supply module is electrically connected with the detection control box and the alternating current contactor respectively, and the gas detector body and the probe at the bottom of the detection control box are used for monitoring the concentration of CO gas in real time, and when the concentration of the CO gas exceeds the standard, the system sends out an alarm signal through the alarm and transmits the signal to the intermediate relay, so that the CO gas is detected. The alternating-current contactor is then controlled by the intermediate relay to start the axial flow fan for ventilation, and the system is connected with the alternating-current contactor through the air switch, so that the safety of the whole control device is ensured, and potential safety hazards such as fire caused by short circuit are avoided. Therefore, safe and stable operation of the distribution room in the gas-related area is ensured, personal unsafe accidents are reduced, and people-oriented and safe production is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detector interlocking smoke exhaust fan control, in particular to a gas detector interlocking smoke exhaust fan control device. Background Art

[0002] The gas detector is interlocked with the automatic control system of the smoke exhaust fan. A fixed CO gas detector is installed in the low-voltage cable mezzanine of the main plant. The gas detector is correctly set according to the standard. The dry contact signal of the alarm output is connected to the 24V relay control circuit to achieve mechanical action interlocking of each alarm action signal, and then the AC contactor action is controlled by the intermediate relay to realize the start and stop control of the fan.

[0003] In existing gas distribution rooms, an independent system is usually used to control gas detectors for detection. When the CO gas concentration is too high, the system will issue an alarm, and the operator must manually turn on the fan control system to ventilate the distribution room. However, this method is not only inefficient but also lacks protection for the personal safety of operators, because delayed response may lead to dangerous situations. To this end, we propose a gas detector interlocking smoke exhaust fan control device. Utility Model Content

[0004] The purpose of the utility model is to provide a gas detector interlocking smoke exhaust fan control device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gas detector interlocking smoke exhaust fan control device, comprising a detection control box, an axial flow fan and a protective box, the detection control box and the axial flow fan are both electrically connected to the interior of the protective box, the bottom of the detection control box is fixedly installed with a gas detector body, the bottom of the gas detector body is fixedly installed with a detection probe, the top of the detection control box is fixedly installed with an alarm, the gas detector body and the alarm are both electrically connected to the interior of the detection control box, the interior of the protective box is fixedly installed with an air switch, a power module, an AC contactor and an intermediate relay, one side of the protective box is rotatably connected to a protective door, the outside of the protective door is rotatably connected to a handle, and a locking assembly is provided on the inside of the protective door.

[0006] As a further preferred embodiment of the present technical solution, the locking assembly includes a first mounting plate, a second mounting plate and a card slot, the first mounting plate and the second mounting plate are both fixedly connected to the inner side of the protective door, the inner side of the protective door is rotatably connected to a connecting rod, one end of the connecting rod extends to the outer side of the protective door and is fixedly connected to the handle, the card slot is opened on the inner side of the protective box, and a connecting shaft is slidably connected between the first mounting plate and the second mounting plate, and the connecting shaft passes through the first mounting plate and the second mounting plate.

[0007] As a further optimization of this technical solution, a limiting block is fixedly connected to the outer side of the connecting shaft. A spring is fixedly connected between one side of the limiting block and one side of the first mounting plate, and one side of the limiting block abuts against the second mounting plate.

[0008] As a further optimization of this technical solution, a rack is fixedly connected to one end of the connecting shaft. A clamping block is fixedly connected to one side of the rack. A gear is fixedly connected to one end of the connecting rod. The gear meshes with the rack, and the clamping block is slidably connected between the inner walls of the card slots.

[0009] As a further optimization of this technical solution, the input end of the detection control box is electrically connected to the output end of the power supply module. The output end of the power supply module is electrically connected to the intermediate relay. The signal output end of the detection control box is electrically connected to the signal input end of the intermediate relay. The power output end of the air switch is electrically connected to the input end of the AC contactor. The output end of the intermediate relay is electrically connected to the input end of the AC contactor. The output end of the AC contactor is electrically connected to the input end of the axial flow fan.

[0010] As a further optimization of this technical solution, two fixing plates are fixedly connected to one side of the protection box. Pipe sleeves are fixedly connected to the tops of the two fixing plates. Two connecting plates are fixedly connected to one side of the protection door. Rotating shafts are fixedly connected to the bottoms of the two connecting plates. The two rotating shafts are respectively rotatably connected between the inner walls of the two pipe sleeves.

[0011] As a further optimization of this technical solution, heat dissipation grooves are provided on both sides of the protection box.

[0012] The utility model provides a gas detector interlock smoke exhaust fan control device, which has the following beneficial effects:

[0013] (1) In the utility model, the power supply module is electrically connected to the detection control box and the AC contactor respectively. Then, through the gas detector body and the probe at the bottom of the detection control box, the concentration of carbon monoxide (CO) gas can be monitored in real time. When the concentration of CO gas exceeds the standard, the system will send an alarm signal through the alarm, and transmit this signal to the intermediate relay. Subsequently, the intermediate relay controls the AC contactor to start the axial flow fan for ventilation. At the same time, the system is connected to the AC contactor through the air switch, thus ensuring the safety of the entire control device, avoiding potential safety hazards such as fires caused by short circuits, and then ensuring the safe and stable operation of the distribution room in the gas-related area, reducing personal safety accidents, and realizing people-oriented and safe production.

[0014] (2) The utility model effectively protects the air switch, power module, AC contactor and intermediate relay through the protection box and the protection door. At the same time, the inside of the protection box is dissipated heat through the heat dissipation grooves, so as to extend the service life of the system. Then, through the action of the locking component, the operator can manually pull the handle, so that the rotating shafts on the two connecting plates rotate inside the sleeve of the two fixing plates, thereby realizing the opening and closing of the protection door, which not only improves the safety of the protection box, but also makes the maintenance operation more convenient. Brief Description of the Drawings

[0015] Figure 1 is a schematic three-dimensional structure diagram of the utility model;

[0016] Figure 2 is a schematic internal structure diagram of the protection box of the utility model;

[0017] Figure 3 is a schematic structure diagram of the protection door of the utility model;

[0018] Figure 4 is of the utility model Figure 2 schematic diagram of the structure at A in;

[0019] Figure 5 is of the utility model Figure 3 schematic diagram of the structure at B in;

[0020] In the figure: 1, detection control box; 2, axial flow fan; 3, protection box; 4, protection door; 5, handle; 6, heat dissipation groove; 7, air switch; 8, power module; 9, AC contactor; 10, intermediate relay; 11, fixing plate; 12, sleeve; 13, connecting plate; 14, rotating shaft; 15, first mounting plate; 16, connecting shaft; 17, spring; 18, limit block; 19, second mounting plate; 20, rack; 21, gear; 22, connecting rod; 23, block; 24, card slot; 25, gas detector body; 26, detection probe; 27, alarm. Detailed Embodiment

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0022] The present utility model provides a technical solution: as Figures 1-5As shown in the figure, in this embodiment, a control device for interlocking an exhaust fan of a gas detector includes a detection control box 1, an axial flow fan 2, and a protection box 3. The detection control box 1 and the axial flow fan 2 are both electrically connected to the inside of the protection box 3. A gas detector body 25 is fixedly installed at the bottom of the detection control box 1, and a detection probe 26 is fixedly installed at the bottom of the gas detector body 25. An alarm 27 is fixedly installed at the top of the detection control box 1. Both the gas detector body 25 and the alarm 27 are electrically connected to the inside of the detection control box 1. An air switch 7, a power supply module 8, a contactor 9, and an intermediate relay 10 are fixedly installed inside the protection box 3. A protection door 4 is rotatably connected to one side of the protection box 3, and a handle 5 is rotatably connected to the outside of the protection door 4. A locking assembly is provided on the inner side of the protection door 4. The input end of the detection control box 1 is electrically connected to the output end of the power supply module 8. The output end of the power supply module 8 is electrically connected to the intermediate relay 10. The signal output end of the detection control box 1 is electrically connected to the signal input end of the intermediate relay 10. The power output end of the air switch 7 is electrically connected to the input end of the contactor 9. The output end of the intermediate relay 10 is electrically connected to the input end of the contactor 9. The output end of the contactor 9 is electrically connected to the input end of the axial flow fan 2. Two fixing plates 11 are fixedly connected to one side of the protection box 3, and pipe sleeves 12 are fixedly connected to the tops of the two fixing plates 11. Two connecting plates 13 are fixedly connected to one side of the protection door 4, and rotating shafts 14 are fixedly connected to the bottoms of the two connecting plates 13. The two rotating shafts 14 are respectively rotatably connected between the inner walls of the two pipe sleeves 12. Heat dissipation slots 6 are provided on both sides of the protection box 3.

[0023] Before ventilation and air change in the distribution room, first set the detection parameters through the detection control box 1, and then electrically connect the power supply module 8 to the detection control box 1, so that the detection probe 26 at the bottom of the gas detector body 25 detects the CO gas concentration. When the CO gas concentration is too high, the system will send an alarm signal through the alarm 27 and transmit this signal to the intermediate relay 10. By electrically connecting the power supply module 8 to the intermediate relay 10, the intermediate relay 10 controls the contactor 9 to start the axial flow fan 2, so as to conduct ventilation and air change in the distribution room. Then, through the connection between the air switch 7 and the contactor 9, the effect of protecting the system is achieved. Next, the air switch 7, the power supply module 8, the contactor 9, and the intermediate relay 10 are protected through the functions of the protection box 3 and the protection door 4. Then, the inside of the protection box 3 is cooled through the heat dissipation slots 6 to ensure the long-term normal operation of the control system. When inspecting and maintaining the air switch 7, the power supply module 8, the contactor 9, and the intermediate relay 10 in the later stage, through the function of the locking assembly, then the operator manually pulls the handle 5 so that the rotating shafts 14 on the two connecting plates 13 rotate inside the pipe sleeves 12 of the two fixing plates 11, thereby opening the protection door 4. At the same time, it is necessary to regularly conduct smoke alarm and exhaust tests on the system in the later stage, which improves the convenience and efficiency of system maintenance.

[0024] As Figures 1-5 shown, the locking component includes a first mounting plate 15, a second mounting plate 19 and a card slot 24. Both the first mounting plate 15 and the second mounting plate 19 are fixedly connected to the inner side of the protective door 4. A connecting rod 22 is rotatably connected to the inner side of the protective door 4. One end of the connecting rod 22 extends to the outside of the protective door 4 and is fixedly connected to the handle 5. The card slot 24 is opened on the inner side of the protective box 3. A connecting shaft 16 is slidably connected between the first mounting plate 15 and the second mounting plate 19. The connecting shaft 16 penetrates through the first mounting plate 15 and the second mounting plate 19. A limiting block 18 is fixedly connected to the outer side of the connecting shaft 16. A spring 17 is fixedly connected between one side of the limiting block 18 and one side of the first mounting plate 15. One side of the limiting block 18 abuts against the second mounting plate 19. One end of the connecting shaft 16 is fixedly connected to a rack 20. A clamping block 23 is fixedly connected to one side of the rack 20. One end of the connecting rod 22 is fixedly connected to a gear 21. The gear 21 meshes with the rack 20. The clamping block 23 is slidably connected between the inner walls of the card slot 24.

[0025] By manually rotating the handle 5, the connecting rod 22 drives the gear 21 to rotate, thereby causing the rack 20 to drive the connecting shaft 16 to slide between the first mounting plate 15 and the second mounting plate 19, so that the limiting block 18 presses the spring 17, thus driving the clamping block 23 to slide inside the card slot 24, thereby improving the service life of the device and the efficiency of inspection and maintenance.

[0026] The utility model provides a control device for interlocking an exhaust fan of a gas detector, and the specific working principle is as follows: Before ventilation and air exchange are carried out in the distribution room, first set detection parameters through the detection control box 1, and then electrically connect the power supply module 8 with the detection control box 1, so that the detection probe 26 at the bottom of the gas detector body 25 detects the concentration of CO gas. When the concentration of CO gas is too high, the system will send an alarm signal through the alarm 27 and transmit the signal to the intermediate relay 10. The power supply module 8 is electrically connected with the intermediate relay 10, so that the intermediate relay 10 controls the AC contactor 9 to start the axial flow fan 2, thereby carrying out ventilation and air exchange in the distribution room. Then, through the connection between the air switch 7 and the AC contactor 9, the effect of protecting the system is achieved. Next, the air switch 7, the power supply module 8, the AC contactor 9 and the intermediate relay 10 are protected through the action of the protection box 3 and the protection door 4. Then, the inside of the protection box 3 is cooled through the heat dissipation slots 6 to ensure the long-term normal operation of the control system. When inspecting and maintaining the air switch 7, the power supply module 8, the AC contactor 9 and the intermediate relay 10 in the later stage, the connecting rod 22 can be driven to rotate the gear 21 by manually rotating the grip 5, and then the rack 20 drives the connecting shaft 16 to slide between the first mounting plate 15 and the second mounting plate 19, so that the limiting block 18 presses the spring 17, thereby driving the clamping block 23 to slide inside the clamping groove 24. Then, the operator manually pulls the grip 5 to make the rotating shafts 14 on the two connecting plates 13 rotate inside the sleeves 12 of the two fixing plates 11, thereby opening the protection door 4. At the same time, it is necessary to regularly conduct smoke alarm and exhaust tests on the system in the later stage.

[0027] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An interlock smoke exhaust fan control device for a gas detector, comprising a detection control box (1), an axial flow fan (2) and a protective box (3), characterized in that: The detection control box (1) and the axial flow fan (2) are both electrically connected to the inside of the protection box (3). A gas detector body (25) is fixedly installed at the bottom of the detection control box (1). A detection probe (26) is fixedly installed at the bottom of the gas detector body (25). An alarm (27) is fixedly installed at the top of the detection control box (1). Both the gas detector body (25) and the alarm (27) are electrically connected to the inside of the detection control box (1). An air switch (7), a power supply module (8), a contactor (9) and a intermediate relay (10) are fixedly installed inside the protection box (3). A protection door (4) is rotatably connected to one side of the protection box (3). A handle (5) is rotatably connected to the outside of the protection door (4). A locking assembly is arranged on the inner side of the protection door (4).

2. The interlocking exhaust fan control device for a gas detector according to claim 1, wherein: The locking assembly includes a first mounting plate (15), a second mounting plate (19) and a card slot (24). Both the first mounting plate (15) and the second mounting plate (19) are fixedly connected to the inner side of the protection door (4). A connecting rod (22) is rotatably connected to the inner side of the protection door (4). One end of the connecting rod (22) extends to the outside of the protection door (4) and is fixedly connected to the handle (5). The card slot (24) is opened on the inner side of the protection box (3). A connecting shaft (16) is slidably connected between the first mounting plate (15) and the second mounting plate (19). The connecting shaft (16) penetrates through the first mounting plate (15) and the second mounting plate (19).

3. The interlock smoke exhaust fan control device for a gas detector according to claim 2, characterized in that: A limit block (18) is fixedly connected to the outside of the connecting shaft (16). A spring (17) is fixedly connected between one side of the limit block (18) and one side of the first mounting plate (15). One side of the limit block (18) abuts against the second mounting plate (19).

4. The interlocking exhaust fan control device for a gas detector according to claim 2, characterized in that: One end of the connecting shaft (16) is fixedly connected to a rack (20). A clamping block (23) is fixedly connected to one side of the rack (20). One end of the connecting rod (22) is fixedly connected to a gear (21). The gear (21) meshes with the rack (20). The clamping block (23) is slidably connected between the inner walls of the card slot (24).

5. The gas detector interlocked smoke exhaust fan control device according to claim 1, wherein: The input end of the detection control box (1) is electrically connected to the output end of the power supply module (8). The output end of the power supply module (8) is electrically connected to the intermediate relay (10). The signal output end of the detection control box (1) is electrically connected to the signal input end of the intermediate relay (10). The power output end of the air switch (7) is electrically connected to the input end of the contactor (9). The output end of the intermediate relay (10) is electrically connected to the input end of the contactor (9). The output end of the contactor (9) is electrically connected to the input end of the axial flow fan (2).

6. A gas detector interlock smoke exhaust fan control device according to claim 1, characterized in that: On one side of the protection box (3), two fixing plates (11) are fixedly connected. On the top of each of the two fixing plates (11), a pipe sleeve (12) is fixedly connected. On one side of the protection door (4), two connecting plates (13) are fixedly connected. At the bottom of each of the two connecting plates (13), a rotating shaft (14) is fixedly connected. The two rotating shafts (14) are respectively rotatably connected between the inner walls of the two pipe sleeves (12).

7. The interlock smoke exhaust fan control device for a gas detector according to claim 1, characterized in that: Heat dissipation slots (6) are formed on both sides of the protection box (3).

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