Switching valve special for waste gas recovery device

Abstract

The utility model discloses a special switching valve for a waste gas recovery device, and relates to the technical field of waste gas treatment, the special switching valve comprises a valve main body, the inner wall of the valve main body is fixedly connected with a connecting block, and a sealing block is arranged, so that when waste gas is recovered through the valve, in order to prevent the gas from flowing back after being output, the sealing block is used for sealing the valve main body. When waste gas is input from the gas inlet pipe and output from the exhaust pipe, the air pressure on one side of the gas inlet pipe is larger than that on one side of the output pipe, the sealing block and the adjusting block are punched, and the sealing block and the adjusting block are driven to slide out of the connecting block under the connection of the spring, so that the gas is conveyed; the air pressure on one side of the conveying pipe is larger than the air pressure on one side of the air inlet pipe, and the sealing block is attached to the connecting block under the reaction effect of the spring, so that the effect of blocking the surface of the connecting block is achieved, and the effect of reducing backflow of air from the connecting block is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a special switching valve for a waste gas recovery device. Background Technique

[0002] Waste gas refers to the toxic and harmful gases discharged by humans in the production and living processes. Especially in chemical plants, steel plants, pharmaceutical plants, coking plants, oil refineries, etc., the discharged waste gas has a strong smell, seriously pollutes the environment and affects human health. When recovering and treating waste gas, it is necessary to control the conveying operation of waste gas during treatment through the connection of valves.

[0003] However, when the existing special switching valve for waste gas recovery device is in use, it can perform better opening and closing operations for waste gas conveyance. However, when the intake pipe stops conveying waste gas, the blocking effect on the anti-backflow of waste gas in the exhaust pipe is not high, resulting in the backflow of the conveyed waste gas to the intake pipe, causing the situation of incomplete waste gas conveyance and reducing the waste gas conveyance efficiency.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structural deficiencies, and a special switching valve for a waste gas recovery device is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a special switching valve for a waste gas recovery device to solve the problem of low blocking effect on the anti-backflow of waste gas in the exhaust pipe when the intake pipe stops conveying waste gas as proposed in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A special switching valve for a waste gas recovery device, including a valve body. An inner wall of the valve body is fixedly connected with a connecting block. The inner wall of the valve body is fixedly connected with a fixing block located on one side of the connecting block. An outer wall of the fixing block is fixedly connected with a spring. One end of the spring is fixedly connected with a sealing block. An outer wall of the sealing block is fixedly connected with an adjusting block slidably connected to an inner wall of the connecting block. An outer wall of the valve body is fixedly connected with a control box. A worm is rotatably connected to an inner wall of the control box. One end of the worm is fixedly connected with a handwheel. The outer wall of the worm is meshed with a worm gear rotatably connected to the inner wall of the control box. A rotation center of the worm gear is fixedly connected with a connecting shaft through a rotating shaft. An outer wall of the connecting shaft is fixedly connected with a valve plate rotatably connected to an inner wall of the valve body.

[0007] Further, an outer wall contour of the connecting block is in a hollow circular shape.

[0008] Further, an outer wall contour of the fixing block is in a hollowed-out shape.

[0009] Further, the rotation center of the worm gear and the rotation center of the connecting shaft are on the same horizontal plane.

[0010] Furthermore, a sealing ring is provided at the connection part between the inner wall of the valve body and the valve plate.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. Through the setting of the sealing block, when the waste gas is recycled and treated by the valve, in order to prevent the gas from flowing back after being output, when the waste gas is input from the intake pipe and output from the exhaust pipe, at this time, the air pressure on the intake pipe side is greater than that on the output pipe side, and the sealing block and the adjusting block are pressed, and under the connection of the spring, the sealing block and the adjusting block slide out of the connecting block, enabling the gas to be transported. When the intake pipe gradually stops transporting, at this time, the air pressure on the conveying pipe side will be greater than that on the intake pipe side, and under the reaction of the spring, the sealing block fits with the connecting block, playing a role in blocking the surface of the connecting block, achieving the effect of reducing the gas from flowing back at the connecting block;

[0013] 2. Through the setting of the valve plate, when the waste gas is recycled and treated by the valve, in order to improve the self-locking effect after the valve is opened, when the valve needs to be opened, the handwheel is rotated, the worm rotates, drives the worm wheel to rotate, and the rotation of the worm wheel drives the valve plate to rotate along the inside of the valve through the connection of the connecting shaft, playing a role in effectively opening and transporting the inner wall of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the valve;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the valve in another direction;

[0016] Figure 3 It is a connection structural schematic diagram of the sealing block and the connecting block;

[0017] Figure 4 It is a connection structural schematic diagram of the spring and the sealing block.

[0018] In the figure: 1, valve body; 2, connecting block; 3, fixed block; 4, spring; 5, sealing block; 6, adjusting block; 7, control box; 8, worm; 9, handwheel; 10, worm wheel; 11, connecting shaft; 12, valve plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Embodiment: As Figures 1-4 shown, a special switching valve for a waste gas recovery device includes a valve body 1. A connecting block 2 is fixedly connected to the inner wall of the valve body 1. A fixing block 3 is fixedly connected to the inner wall of the valve body 1 on one side of the connecting block 2. A spring 4 is fixedly connected to the outer wall of the fixing block 3. One end of the spring 4 is fixedly connected to a sealing block 5. An adjusting block 6 that is slidably connected to the inner wall of the connecting block 2 is fixedly connected to the outer wall of the sealing block 5. A control box 7 is fixedly connected to the outer wall of the valve body 1. A worm 8 is rotatably connected to the inner wall of the control box 7. A handwheel 9 is fixedly connected to one end of the worm 8. A worm gear 10 that is rotatably connected to the inner wall of the control box 7 is engaged with the outer wall of the worm 8. The rotation center of the worm gear 10 is fixedly connected to a connecting shaft 11 through a rotating shaft. A valve plate 12 that is rotatably connected to the inner wall of the valve body 1 is fixedly connected to the outer wall of the connecting shaft 11. During operation, by setting the valve plate 12, when recovering and treating waste gas through the valve, in order to improve the self-locking effect after the valve is opened, when the valve needs to be opened, the handwheel 9 can be rotated. Through the rotation of the worm 8, the worm gear 10 is driven to perform a rotational movement. The rotation of the worm gear 10 drives the valve plate 12 to perform a rotational movement along the inside of the valve through the connection of the connecting shaft 11, playing a role in effectively opening and conveying the inner wall of the valve.

[0021] Furthermore, the outer wall contour of the connecting block 2 is in the shape of a hollow circle, which is beneficial for the setting of the outer wall contour of the connecting block 2 being in the shape of a hollow circle to play a role in effectively preventing the backflow of gas during transportation.

[0022] Furthermore, the outer wall contour of the fixing block 3 is in a hollowed-out shape, which is beneficial for the setting of the outer wall contour of the fixing block 3 being in a hollowed-out shape to play a role in conveniently transporting gas.

[0023] Furthermore, the rotation center of the worm gear 10 and the rotation center of the connecting shaft 11 are on the same horizontal plane. The valve plate 12 forms a flipping structure with the valve body 1 through the worm gear 10 and the connecting shaft 11, which is beneficial for the rotation of the worm gear 10 to drive the valve plate 12 to perform a rotational movement along the inner wall of the valve body 1 through the connection of the connecting shaft 11, playing a role in effectively opening and conveying the inner wall of the valve.

[0024] Furthermore, a sealing ring is provided at the connection part between the inner wall of the valve body 1 and the valve plate 12, which is beneficial for playing a role in effectively opening and conveying the inner wall of the valve and effectively blocking gas.

[0025] Working principle: When using the special switching valve for the waste gas recovery device, first, when recovering and treating the waste gas through the valve, in order to prevent the gas from flowing back after output, when the waste gas is input from the intake pipe and output from the exhaust pipe, the air pressure on the intake pipe side is greater than that on the output pipe side at this time, and the sealing block 5 and the adjusting block 6 are pressed. Under the connection of the spring 4, the sealing block 5 and the adjusting block 6 slide out of the connecting block 2, enabling the gas to be transported. When the intake pipe gradually stops transporting, at this time, the air pressure on the conveying pipe side will be greater than that on the intake pipe side, and under the reaction of the spring 4, the sealing block 5 fits with the connecting block 2, playing a role in blocking the surface of the connecting block 2, achieving the effect of reducing the gas from flowing back at the connecting block 2.

[0026] Finally, when recovering and treating the waste gas through the valve, in order to improve the self-locking effect after the valve is opened, when the valve needs to be opened, the handwheel 9 can be rotated. Through the rotation of the worm 8, the worm gear 10 is driven to rotate. The rotation of the worm gear 10 drives the valve plate 12 to rotate along the inside of the valve through the connection of the connecting shaft 11, playing a role in effectively opening and transporting the inner wall of the valve.

[0027] This is the working principle of the special switching valve for the waste gas recovery device.

[0028] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

Claims

1. A switching valve for a waste gas recovery device, comprising a valve body (1), characterized in that: The inner wall of the valve body (1) is fixedly connected to a connecting block (2), the inner wall of the valve body (1) is fixedly connected to a fixing block (3) located on one side of the connecting block (2), the outer wall of the fixing block (3) is fixedly connected to a spring (4), one end of the spring (4) is fixedly connected to a sealing block (5), the outer wall of the sealing block (5) is fixedly connected to an adjusting block (6) slidably connected to the inner wall of the connecting block (2), the outer wall of the valve body (1) is fixedly connected to a control box (7), the inner wall of the control box (7) is rotatably connected to a worm (8), one end of the worm (8) is fixedly connected to a hand wheel (9), the outer wall of the worm (8) is meshed with a worm wheel (10) rotatably connected to the inner wall of the control box (7), the rotation center of the worm wheel (10) is fixedly connected to a connecting shaft (11) via a rotating shaft, and the outer wall of the connecting shaft (11) is fixedly connected to a valve plate (12) rotatably connected to the inner wall of the valve body (1).

2. A special switching valve for waste gas recovery device according to claim 1, characterized in that: The outer wall profile of the connecting block (2) is in the shape of a hollow circle.

3. A switching valve for waste gas recovery device according to claim 1, characterized in that: The outer wall profile of the fixing block (3) is hollow.

4. The switching valve for waste gas recovery device according to claim 1, characterized in that: The rotation center of the worm wheel (10) and the rotation center of the connecting shaft (11) are located on the same horizontal plane.

5. The switching valve for waste gas recovery device according to claim 1, characterized in that: A sealing ring is provided at the connection portion between the inner wall of the valve body (1) and the valve plate (12).

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