Positive pressure explosion-proof motor ventilation purging device for underground parking lot

Abstract

The utility model discloses a positive pressure explosion-proof motor ventilation purging device for an underground parking lot, and belongs to the technical field of building electrical explosion prevention. An air storage bin is arranged between the inner shell and the machine shell. An air outlet hole is fixedly formed in the front portion of the inner shell. An air return hole is fixedly formed in the rear portion of the inner shell. A fixed air guide barrel is fixedly connected to the inner wall of the inner shell, and a rotary air guide barrel is rotationally connected to the inner wall of the fixed air guide barrel. A motor is fixedly connected to the center of the rear inner wall of the shell. The sliding tooth holder is arranged, the power of the motor is output to the rotating air guide barrel, so that inert gas in the machine shell is driven to continuously flow, explosive gas accumulation is avoided, and rapid heat dissipation of the motor is facilitated. The explosion-proof motor is mainly used for replacing explosion-proof gas in the explosion-proof motor with inert gas, and safe operation of power equipment in an underground parking lot electrical system is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of building electrical explosion-proof technology, and more specifically, it relates to a positive pressure explosion-proof motor ventilation and purging device for underground parking lots. Background Technology

[0002] Underground parking lots have a complex environment with relatively poor air circulation and frequent personnel traffic. Ensuring the safe operation of power equipment can effectively prevent various disasters and accidents and protect the lives of personnel. Underground parking lots pose a risk of fuel leakage. Motors and electrical appliances used in such locations are usually purged with positive pressure air to keep the gas inside the motors and appliances within a safe range and maintain positive air pressure, in order to prevent electrical sparks from igniting explosive gases.

[0003] Chinese patent application publication number "CN116317292A" discloses a positive pressure type explosion-proof motor ventilation and purging device, including a housing, and a purging mechanism installed inside the housing. The purging mechanism includes an inert gas conduit, a sealing partition, and a one-way solenoid valve. The blowing end of the inert gas conduit is connected to the inside of the housing, and the sealing partition is fixedly installed on the top of the inner side of the housing. By introducing inert gas into the inside of the housing, the explosive gas inside the explosion-proof motor is replaced, which can also avoid the problem of explosion in the presence of sparks, corona, high temperature, etc. inside the explosion-proof motor.

[0004] During later use, the device still had the following problems: the purging mechanism had limited guiding effect on the inert gas, making it difficult for the inert gas to quickly and completely replace the explosive gas inside the explosion-proof motor. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a positive pressure explosion-proof motor ventilation and purging device for underground parking lots. By setting a sliding tooth seat, the power output of the motor can be sent to the rotating air guide tube, so that the rotating air guide tube can be kept rotating for a long time, thereby driving the continuous flow of inert gas inside the casing, avoiding the accumulation of explosive gas, and facilitating the rapid heat dissipation of the motor.

[0006] The aforementioned positive pressure explosion-proof motor ventilation and purging device for underground parking lots includes a housing, a pneumatic housing fixedly mounted at the front of the housing, an opening fixedly opened on the outer wall of the pneumatic housing, a sliding toothed seat slidably connected to the inner wall of the pneumatic housing, an exhaust pipe fixedly mounted on the top of the housing, an inner housing fixedly mounted inside the housing, an air storage chamber provided between the inner housing and the housing, an air outlet fixedly opened at the front of the inner housing, an air return hole fixedly opened at the rear of the inner housing, a fixed air guide tube fixedly connected to the inner wall of the inner housing, a rotating air guide tube rotatably connected to the inner wall of the fixed air guide tube, a motor fixedly connected to the center of the rear inner wall of the housing, the output axis of the motor extending outward from the pneumatic housing and rotatably connected to the outer wall of the pneumatic housing, and an air inlet fixedly opened on the rear side wall of the housing.

[0007] Preferably, the air inlet is matched with a fixed air guide tube.

[0008] Preferably, a one-way pressure valve is fixedly installed inside the exhaust pipe.

[0009] Preferably, a second vent pipe is fixedly connected to the outside of the air inlet, a three-way valve is fixedly connected to the rear of the second vent pipe, a valve is fixedly connected to the rear of the three-way valve, a first vent pipe is fixedly connected to the side wall of the three-way valve, and the other end of the first vent pipe is fixedly connected to the opening.

[0010] Preferably, a fixed gear ring is fixedly connected to the output shaft of the motor, and the output shaft of the motor is slidably connected to the inner wall of the sliding gear seat, with the fixed gear ring cooperating with the sliding gear seat.

[0011] Preferably, the rear of the rotating air guide tube is fixedly provided with an air intake blade, the front of the rotating air guide tube is fixedly provided with an air delivery blade, the center of the front of the rotating air guide tube is fixedly provided with a follower gear ring, a compression spring is fixedly connected to the follower gear ring, the other end of the compression spring is fixedly connected to the sliding gear seat, and the follower gear ring and the sliding gear seat mesh with each other.

[0012] Preferably, the air delivery blade is matched with the air outlet, and the air intake blade is matched with the air return outlet.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By setting up a rotating air guide tube, the gas inside the casing can circulate and continuously and thoroughly blow the surface of the motor.

[0015] 2. By setting a sliding toothed seat, the power output of the motor can be sent to the rotating air guide tube, so that the rotating air guide tube can continue to rotate for a long time, thereby driving the continuous flow of inert gas inside the casing, avoiding the accumulation of explosive gas, and facilitating the rapid heat dissipation of the motor, ensuring the safe operation of power equipment in the electrical system of the underground parking lot. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the rear structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 4 This is a schematic diagram of the internal structure of the casing;

[0020] Figure 5 A schematic diagram of the structure of the fixed air guide duct;

[0021] Figure 6 This is a schematic diagram of the rotating air guide tube.

[0022] Figure 7 A schematic diagram of the front structure of the fixed air guide tube and the rotating air guide tube;

[0023] Figure 8 A schematic diagram of the rear structure of the fixed air guide tube and the rotating air guide tube;

[0024] Figure 9 This is a schematic diagram of the electric motor.

[0025] Figure 10 This is a schematic diagram of the front structure of the rotating air guide tube and the electric motor.

[0026] In the diagram, 1. Housing; 101. Air pressure housing; 102. Exhaust pipe; 103. Inner shell; 103A. Air outlet; 103B. Air return hole; 104. Air inlet; 105. Air storage chamber; 2. Ventilation pipe one; 3. Valve; 4. Three-way valve; 5. Ventilation pipe two; 6. Fixed air guide tube; 7. Rotating air guide tube; 701. Air delivery blade; 702. Air intake blade; 703. Follower gear ring; 8. Motor; 801. Fixed gear ring; 9. One-way pressure valve; 10. Compression spring; 11. Sliding gear seat. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise expressly specified and limited, the terms "setting," "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] like Figure 1 , Figure 3 and Figure 4 As shown, a positive pressure explosion-proof motor ventilation and purging device for underground parking lots includes a housing 1. A pneumatic housing 101 is fixedly installed at the front of the housing 1. An opening is fixedly opened on the outer wall of the pneumatic housing 101. A sliding toothed seat 11 is slidably connected to the inner wall of the pneumatic housing 101. By introducing high-pressure inert gas into the pneumatic housing 101 through the opening, the sliding toothed seat 11 inside can be pushed to slide backward. By setting the sliding toothed seat 11, the power output of the motor 8 can be transmitted to the rotating air guide 7, so that the rotating air guide 7 can continue to rotate for a long time, thereby driving the continuous flow of inert gas inside the housing 1, avoiding the accumulation of explosive gas, and facilitating the rapid heat dissipation of the motor 8. An exhaust pipe 102 is fixedly installed on the top of the housing 1, and a one-way pressure valve 9 is fixedly installed inside the exhaust pipe 102. An inner shell 103 is fixedly installed inside the casing 1. A gas storage chamber 105 is provided between the inner shell 103 and the casing 1. The gas in the gas storage chamber 105 can be discharged from the casing 1 through a one-way pressure valve 9 to replace the gas inside the casing 1. An explosion gas detector is fixedly installed on the inner wall of the gas storage chamber 105 to detect the gas composition in the gas storage chamber 105. The explosion gas detector is existing technology and can be purchased on the market, so it will not be described in detail here.

[0030] An air outlet 103A is fixedly opened at the front of the inner shell 103, and a return air outlet 103B is fixedly opened at the rear of the inner shell 103. Driven by the rotating air guide tube 7, the gas near the motor 8 is blown into the air storage chamber 105 through the air outlet 103A, and then blown back to the vicinity of the motor 8 through the return air outlet 103B. This cycle repeats, allowing the air inside the casing 1 to flow continuously and purge the motor 8. A fixed air guide tube 6 is fixedly connected to the inner wall of the inner shell 103. The fixed air guide tube 6 is composed of a straight blade and a spacer ring. A rotating air guide tube 7 is rotatably connected to the inner wall of the fixed air guide tube 6. A motor 8 is fixedly connected to the center of the rear inner wall of the casing 1. The output axis of the motor 8 extends outward from the air pressure housing 101 and is rotatably connected to the outer wall of the air pressure housing 101. An air inlet 104 is fixedly opened on the rear side wall of the casing 1. Inert gas enters the interior of the casing 1 through the air inlet 104 and replaces the gas inside the casing 1.

[0031] like Figure 5 and Figure 8 As shown, the air inlet 104 is matched with the fixed air guide tube 6. After the inert gas flowing in from the air inlet 104 enters the housing 1, it comes into contact with the fixed air guide tube 6. Due to the obstruction of the spacer ring and the inner shell 103, the inert gas can only flow along the straight blade to the center of the housing 1, where it collides with the blade of the rotating air guide tube 7, causing the rotating air guide tube 7 to rotate.

[0032] like Figure 2As shown, an air inlet 104 is fixedly connected to a second air pipe 5, a three-way valve 4 is fixedly connected to the rear of the second air pipe 5, a valve 3 is fixedly connected to the rear of the three-way valve 4, an air pipe 2 is fixedly connected to the side wall of the three-way valve 4, and the other end of the air pipe 2 is fixedly connected to the opening. Open valve 3 to introduce inert gas, adjust three-way valve 4 to allow inert gas to flow into housing 1 through vent pipe 2 5, replacing the explosive gas inside housing 1 and preparing for the operation of motor 8. When the explosive gas detector checks that the gas inside housing 1 meets the requirements, motor 8 starts. At this time, adjust three-way valve 4 to allow inert gas to enter the pneumatic housing 101 through vent pipe 1 2, generating pressure on the sliding tooth seat 11 inside, pushing the sliding tooth seat 11 to overcome the elastic force of the compression spring 10 and move backward, so that the sliding tooth seat 11 contacts and meshes with the fixed tooth ring 801, transmitting the power of the output shaft of motor 8 to the follower tooth ring 703 through the sliding tooth seat 11, so that the rotating air guide 7 has enough power to rotate continuously, driving the inert gas inside housing 1 to flow continuously.

[0033] like Figure 7 and Figure 9 As shown, a fixed gear ring 801 is fixedly connected to the output shaft of the motor 8. The output shaft of the motor 8 is slidably connected to the inner wall of the sliding gear seat 11, and the fixed gear ring 801 cooperates with the sliding gear seat 11. After the motor 8 starts, its output shaft rotates, driving the fixed gear ring 801 to rotate. When the sliding gear seat 11 has not yet contacted the fixed gear ring 801, the power of the motor 8 cannot be transmitted. When the sliding gear seat 11 moves to contact the fixed gear ring 801, the power of the motor 8 can be transmitted to the rotating air guide 7, causing the rotating air guide 7 to rotate.

[0034] like Figure 6 and Figure 10As shown, an air intake blade 702 is fixedly installed at the rear of the rotary air guide duct 7, and an air delivery blade 701 is fixedly installed at the front of the rotary air guide duct 7. A follower gear ring 703 is fixedly installed at the center of the front of the rotary air guide duct 7, and a compression spring 10 is fixedly connected to the follower gear ring 703. The other end of the compression spring 10 is fixedly connected to the sliding gear seat 11, and the follower gear ring 703 and the sliding gear seat 11 mesh with each other. The air delivery blade 701 cooperates with the air outlet 103A, and the air intake blade 702 cooperates with the air return hole 103B. The air supply blades 701 and the air intake blades 702 rotate in opposite directions. When the rotating air guide tube 7 starts to rotate, the air supply blades 701 blow the gas near the motor 8 from the air outlet 103A into the air storage chamber 105, while the air intake blades 702 draw the gas in the air storage chamber 105 back to the vicinity of the motor 8 from the air return vent 103B. As a result, the inert gas will form a circulating flow in the housing 1, flowing from the rear of the motor 8 to the front of the motor 8, from the front of the motor 8 into the front of the air storage chamber 105, from the front of the air storage chamber 105 to the rear of the air storage chamber 105, and from the rear of the air storage chamber 105 back to the rear of the motor 8.

[0035] The follower gear ring 703 engages with the outer ring of the sliding gear seat 11, and the fixed gear ring 801 engages with the inner ring of the sliding gear seat 11. The follower gear ring 703 and the sliding gear seat 11 are always in a meshing state. However, the sliding gear ring 11 needs to move backward a certain distance in the pneumatic housing 101 before it can contact and mesh with the fixed gear ring 801. When the sliding gear ring 11 moves forward a certain distance under the action of the compression spring 10, it will disengage from the fixed gear ring 801.

[0036] Operating principle;

[0037] 1. Open valve 3 and adjust three-way valve 4 to allow inert gas to enter vent pipe 2 5;

[0038] 2. The inert gas enters the casing 1 and comes into contact with the fixed air guide 6 and the rotating air guide 7. The rotating air guide 7 rotates under the blowing of the inert gas, and the gas inside the casing 1 begins to circulate, preventing the accumulation of explosive gas. The inert gas gradually fills the entire casing 1 and replaces the explosive gas. At the same time, the one-way pressure valve 9 opens, and the explosive gas is discharged from the casing 1.

[0039] 3. After the air inside the casing 1 meets the standard, start the motor 8, and the motor 8 will begin to work;

[0040] 4. Adjust the three-way valve 4, and the air pipe 2 is filled with inert gas. The inert gas fills the air pressure housing 101. Under the action of air pressure, the sliding tooth seat 11 moves backward and meshes with the fixed tooth ring 801. The power of the motor 8 drives the rotating air guide tube 7 to rotate continuously. The inert gas circulates inside the housing 1 and continuously blows the surface of the motor 8, which is conducive to the rapid heat dissipation of the motor 8.

[0041] By setting a sliding toothed seat 11, this utility model can output the power of the motor 8 to the rotating air guide 7, so that the rotating air guide 7 can keep rotating for a long time, thereby driving the continuous flow of inert gas inside the housing 1, avoiding the accumulation of explosive gas, and facilitating the rapid heat dissipation of the motor 8.

Claims

1. A positive pressure explosion-proof motor ventilation and purging device for underground parking lots, characterized in that: The utility model provides a kind of air pressure type air purifier, including shell (1), air pressure shell (101) is fixedly provided in the front of shell (1), air pressure shell (101) outer wall is fixedly provided with opening, sliding gear holder (11) is slidably connected in the inner wall of air pressure shell (101), exhaust pipe (102) is fixedly installed on the top of shell (1), inner shell (103) is fixedly arranged in the inside of shell (1), air storage warehouse (105) is arranged between inner shell (103) and shell (1), air outlet hole (103A) is fixedly provided in the front of inner shell (103), air return hole (103B) is fixedly provided in the rear of inner shell (103), fixed air duct (6) is fixedly connected on the inner wall of inner shell (103), rotating air duct (7) is rotatably connected on the inner wall of fixed air duct (6), motor (8) is fixedly connected on the rear inner wall center of shell (1), the output shaft of motor (8) extends out air pressure shell (101) and is rotatably connected with the outer wall of air pressure shell (101), air inlet (104) is fixedly provided on the side wall of the rear of shell (1).

2. A positive pressure explosion-proof motor purging device for underground parking lots according to claim 1, characterized in that: The air inlet (104) cooperates with the fixed air duct (6).

3. A positive pressure explosion-proof motor purging device for underground parking lots according to claim 1, characterized in that: The one-way pressure valve (9) is fixedly installed inside the exhaust pipe (102).

4. A positive pressure explosion-proof motor purging and ventilation device for underground parking lots according to claim 1, characterized in that: The air inlet (104) is fixedly connected with the air pipe two (5), the air pipe two (5) is fixedly connected with the three-way valve (4), the three-way valve (4) is fixedly connected with the valve (3), the three-way valve (4) is fixedly connected with the air pipe one (2), and the other end of the air pipe one (2) is fixedly connected with the opening.

5. A positive pressure explosion-proof motor purging and ventilation device for underground parking lots according to claim 1, characterized in that: The output shaft of the motor (8) is fixedly connected with the fixed gear ring (801), the output shaft of the motor (8) is slidably connected with the inner wall of the sliding gear holder (11), and the fixed gear ring (801) cooperates with the sliding gear holder (11).

6. A positive pressure explosion-proof motor purging and ventilation device for underground parking lots according to claim 1, characterized in that: The rotating air duct (7) is fixedly provided with suction paddle (702) in the rear, and is fixedly provided with air sending paddle (701) in the front, and is fixedly provided with follow-up gear ring (703) in the front center, the follow-up gear ring (703) is fixedly connected with compression spring (10), the other end of the compression spring (10) is fixedly connected with the sliding gear holder (11), and the follow-up gear ring (703) and the sliding gear holder (11) are engaged with each other.

7. A positive pressure explosion-proof motor purging and ventilation device for underground parking lots according to claim 6, characterized in that: The air sending paddle (701) cooperates with the air outlet hole (103A), and the suction paddle (702) cooperates with the air return hole (103B).

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