Variable frequency speed-regulating explosion-proof ventilation device

Abstract

The utility model discloses a variable frequency speed regulation's explosion -proof ventilation device belongs to ventilation device technical field, including ventilation pipe, transmission assembly and filter screen, transmission assembly is by first transmission shaft, second transmission shaft and transmission cylinder is composed, and first transmission shaft sleeve is equipped with negative pressure blade, and second transmission shaft passes through filter screen and is equipped with cleaning brush, ventilation pipe side wall is equipped with the axle rod, and the axle rod is equipped with first bevel gear, and transmission cylinder both ends are equipped with second bevel gear, and transmission cylinder is connected with first transmission shaft through spring, and transmission cylinder is equipped with the butt joint sleeve, and the second transmission shaft is connected with butt joint dish on the key, and ventilation pipe side wall is equipped with motor. The utility model discloses can drive the cleaning brush rotation to the filter screen and clean through motor drive negative pressure blade reverse rotation, avoid the dust on filter screen and be inhaled in ventilation pipe.

Description

Technical Field

[0001] This utility model relates to the field of ventilation device technology, specifically to an explosion-proof ventilation device with variable frequency speed control. Background Technology

[0002] In the petroleum, chemical, and mining industries, a large amount of flammable and explosive gases and dust are generated during operations. For safety, it is necessary to continuously ventilate the work area to reduce the concentration of flammable and explosive gases. In order to prevent ventilation equipment from igniting these flammable and explosive gases, safer explosion-proof ventilation devices have emerged.

[0003] However, existing explosion-proof ventilation devices will draw in a lot of dust when they are in operation. This dust will accumulate on the filter screen of the explosion-proof ventilation device. Over time, this accumulation will cause blockage of the air duct, affecting the air supply effect of the ventilation device. Moreover, this dust will be drawn into the interior of the explosion-proof ventilation device, resulting in an increase in the dust content in the work area. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an explosion-proof ventilation device with variable frequency speed regulation.

[0005] The technical solution of this utility model is: a variable frequency speed-regulating explosion-proof ventilation device, including a ventilation pipe, a transmission component horizontally rotatably disposed within the ventilation pipe, and a filter screen disposed at one end of the ventilation pipe; the transmission component consists of a first transmission shaft, a second transmission shaft, and a transmission cylinder, one end of the first transmission shaft being splinedly connected to the transmission cylinder, the other end of the first transmission shaft being fitted with a negative pressure blade, one end of the second transmission shaft passing through the filter screen and fitted with a cleaning brush for cleaning the filter screen; a shaft is vertically disposed on the side wall of the ventilation pipe, one end of the shaft being provided with a first bevel gear, both ends of the transmission cylinder being provided with second bevel gears that alternately mesh with the first bevel gears by sliding the transmission cylinder, and one end of the transmission cylinder being connected to the first transmission shaft by a spring, the other end of the transmission cylinder being provided with a docking sleeve, a docking disc being splinedly connected to the second transmission shaft by slidingly engaging with the docking sleeve for transmission, and a motor for driving the shaft rotation is disposed on the side wall of the ventilation pipe.

[0006] Explanation: The above device drives the first bevel gear to rotate via a motor. The first bevel gear drives the negative pressure blades to rotate via a second bevel gear. When a lot of dust accumulates on the filter screen, the electric push rod can drive the docking plate to slide, so that the docking plate connects with the docking sleeve and pushes the transmission cylinder to slide, so that the other second bevel gear meshes with the first bevel gear. At this time, the motor drives the negative pressure blades to rotate in the opposite direction, while driving the cleaning brush to rotate to clean the filter screen. This improves the dust removal effect and blows the dust on the filter screen outward, preventing the dust on the filter screen from being sucked into the ventilation duct.

[0007] Furthermore, a heat dissipation pipe is fitted onto the motor, and a water tank for supplying water into the heat dissipation pipe is provided on the side wall of the ventilation pipe.

[0008] Note: The water tank can circulate water to the heat dissipation pipe to reduce the temperature of the motor and prevent the motor from overheating during operation, which could cause flammable gases to explode.

[0009] Furthermore, the transmission cylinder is connected to the spline groove on the side wall of the first transmission shaft via a spline on its inner wall, and a limiting block is provided at one end of the spline groove to prevent the transmission cylinder from falling off.

[0010] Note: The limit block can prevent the transmission cylinder from separating from the first transmission shaft, thus improving the stability of the device.

[0011] Furthermore, the outer diameter of the docking plate is larger than the inner diameter of the transmission cylinder.

[0012] Note: Limiting the outer diameter of the docking plate ensures that the docking plate can push the transmission cylinder to slide.

[0013] Furthermore, the other end of the second drive shaft is provided with a limiting ring to prevent the mating disc from falling off.

[0014] Note: The limiting ring can prevent the mating plate from separating from the second drive shaft, thus improving the stability of the device.

[0015] The beneficial effects of this utility model are:

[0016] (1) This utility model can drive the negative pressure blades to rotate in the opposite direction by the motor, while driving the cleaning brush to rotate to clean the filter screen. This improves the dust removal effect and blows the dust on the filter screen outward, preventing the dust on the filter screen from being sucked into the ventilation pipe.

[0017] (2) The water tank of this utility model can circulate water to the heat dissipation pipe to reduce the temperature of the motor and prevent the motor from overheating during operation, which could cause the combustible gas to explode. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the ventilation pipe in Embodiment 1 of this utility model;

[0020] Figure 3 This is a longitudinal sectional view of the transmission cylinder in Embodiment 1 of this utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0022] Among them, 1-ventilation pipe, 11-shaft, 12-first bevel gear, 13-motor, 14-heat dissipation pipe, 15-water tank, 2-first drive shaft, 21-negative pressure blade, 22-drive cylinder, 23-second bevel gear, 24-connecting sleeve, 3-second drive shaft, 31-filter screen, 32-cleaning brush, 33-connecting plate, 34-electric push rod. Detailed Implementation

[0023] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0024] Example 1: As Figure 1 , Figure 2 As shown, an explosion-proof ventilation device with variable frequency speed regulation includes a ventilation pipe 1, a transmission assembly that is laterally rotatably disposed within the ventilation pipe 1, and a filter screen 31 disposed at the right end of the ventilation pipe 1; the transmission assembly consists of a first transmission shaft 2, a second transmission shaft 3, and a transmission cylinder 22. Both the first transmission shaft 2 and the second transmission shaft 3 are fitted with connecting rings for rotatably connecting with the ventilation pipe 1. The connecting rings are fixedly connected to the ventilation pipe 1 through connecting rods provided thereon. The right end of the first transmission shaft 2 is splinedly connected to the transmission cylinder 22, and the left end of the first transmission shaft 2 is fitted with a negative pressure blade 21.

[0025] like Figure 3 As shown, the right end of the second drive shaft 3 passes through the filter screen 31 and is fitted with a cleaning brush 32 for cleaning the filter screen 31; a shaft 11 is vertically provided on the side wall of the ventilation pipe 1, and a first bevel gear 12 is provided at the lower end of the shaft 11; the left and right ends of the drive cylinder 22 are provided with second bevel gears 23 that alternately mesh with the first bevel gear 12 by sliding the drive cylinder 22; the left end of the drive cylinder 22 is connected to the first drive shaft 2 by a spring; a fixing ring is fixedly fitted on the first drive shaft 2, and the spring is fitted between the fixing ring and the drive cylinder 22. The right end of the transmission cylinder 22 is provided with a docking sleeve 24. The second transmission shaft 3 is splinedly connected to a docking plate 33 that slides and docks with the docking sleeve 24 for transmission. The second transmission shaft 3 is connected to the docking plate 33 through an electric push rod 34 provided on it. An installation plate is fixedly sleeved on the second transmission shaft 3. The right end of the electric push rod 34 is fixedly connected to the installation plate, and the left end of the electric push rod 34 is fixedly connected to the docking plate 33. The side wall of the ventilation pipe 1 is provided with a motor 13 for driving the shaft 11 to rotate. The motor 13 is a commercially available variable frequency explosion-proof motor.

[0026] The transmission cylinder 22 is connected to the spline groove on the side wall of the first transmission shaft 2 via a spline on its inner wall, and a limiting block is provided at the right end of the spline groove to prevent the transmission cylinder 22 from falling off; the left end of the second transmission shaft 3 is provided with a limiting ring to prevent the docking plate 33 from falling off, and the docking plate 33 is connected to the spline groove on the second transmission shaft 3 via a spline on its inner wall; the outer diameter of the docking plate 33 is 10mm larger than the inner diameter of the transmission cylinder 22.

[0027] The working principle of the above device is as follows: In the initial state, the second bevel gear 23 on the left meshes with the first bevel gear 12. The motor 13 can drive the shaft 11 to rotate, and the shaft 11 drives the first bevel gear 12 to rotate, causing the negative pressure blade 21 to rotate and send air to the left side of the ventilation pipe 1. The filter screen 31 can pass through the dust in the airflow. When too much dust accumulates on the filter screen 31, the electric push rod 34 extends and pushes the docking plate 33 to slide, so that the docking plate 33 connects with the docking sleeve 24 and pushes the transmission cylinder 22 to slide to the left until the second bevel gear 23 on the right meshes with the first bevel gear 12. At this time, the motor 13 can drive the negative pressure blade 21 to rotate in the opposite direction to send air to the right side of the ventilation pipe 1. At the same time, the transmission cylinder 22 can drive the second transmission shaft 3 to rotate through the docking plate 33, so that the cleaning brush 32 cleans the filter screen 31. The reverse rotation of the negative pressure blade 21 blows the dust on the filter screen 31 to the right side of the ventilation pipe 1, avoiding the dust from being sucked into the ventilation pipe 1.

[0028] Example 2: As Figure 2 As shown, this embodiment is basically the same as embodiment 1, except that a heat dissipation pipe 14 is sleeved on the motor 13, and a water tank 15 for supplying water to the heat dissipation pipe 14 is provided on the side wall of the ventilation pipe 1. The inlet and outlet of the heat dissipation pipe 14 are connected to the water tank 15, and a water pump for filling the heat dissipation pipe 14 with water is provided in the water tank 15. The water pump adopts existing technology products.

[0029] The working principle of the heat dissipation pipe 14 is as follows: the water pump can fill the heat dissipation pipe 14 with water, so that the water circulates in the heat dissipation pipe 14 to remove the heat generated by the motor 13 when it is working, and prevent the motor 13 from overheating.

[0030] Example 3: This example is basically the same as Example 1, except that the outer diameter of the mating plate 33 is 5mm larger than the inner diameter of the transmission cylinder 22.

Claims

1. A variable frequency speed control explosion-proof ventilation device, characterized in that, The system includes a ventilation duct (1), a transmission assembly that is laterally rotatable within the ventilation duct (1), and a filter screen (31) disposed at one end of the ventilation duct (1). The transmission assembly consists of a first transmission shaft (2), a second transmission shaft (3), and a transmission cylinder (22). One end of the first transmission shaft (2) is splinedly connected to the transmission cylinder (22), and the other end of the first transmission shaft (2) is fitted with a negative pressure blade (21). One end of the second transmission shaft (3) passes through the filter screen (31) and is fitted with a cleaning brush (32) for cleaning the filter screen (31). A shaft is vertically mounted on the side wall of the ventilation duct (1). The shaft (11) has a first bevel gear (12) at one end, and a second bevel gear (23) at both ends of the transmission cylinder (22) alternately meshes with the first bevel gear (12) by sliding the transmission cylinder (22). One end of the transmission cylinder (22) is connected to the first transmission shaft (2) by a spring, and the other end of the transmission cylinder (22) is provided with a docking sleeve (24). The second transmission shaft (3) is splined with a docking disc (33) that slides and docks with the docking sleeve (24) for transmission. The ventilation pipe (1) has a motor (13) on its side wall for driving the shaft (11) to rotate.

2. The variable frequency speed-adjustable explosion-proof ventilation device according to claim 1, characterized in that, The motor (13) is fitted with a heat dissipation pipe (14), and the ventilation pipe (1) is provided with a water tank (15) for supplying water to the heat dissipation pipe (14) on its side wall.

3. The explosion-proof ventilation device with variable frequency speed control according to claim 1, characterized in that, The transmission cylinder (22) is connected to the spline groove on the side wall of the first transmission shaft (2) via the spline on its inner wall, and a limiting block is provided at one end of the spline groove to prevent the transmission cylinder (22) from falling off.

4. The explosion-proof ventilation device with variable frequency speed control according to claim 1, characterized in that, The outer diameter of the docking plate (33) is larger than the inner diameter of the transmission cylinder (22).

5. The explosion-proof ventilation device with variable frequency speed control according to claim 1, characterized in that, The other end of the second drive shaft (3) is provided with a limiting ring to prevent the mating disc (33) from falling off.

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