Air valve structure of exhaust inlet of dust removal equipment

Abstract

The utility model discloses a dust removal equipment exhaust inlet air valve structure which comprises a valve body and a valve plate assembly, the valve body is of a front-back communicated frame structure, flanges are arranged on the two sides of the valve body, the upper wall of the valve body is fixedly connected with an upper baffle, the lower wall of the valve body is fixedly connected with a lower baffle, and the upper baffle and the lower baffle are used for limiting when an upper valve plate and a lower valve plate fall back respectively. The valve plate assembly comprises a rotating shaft arranged in the valve body, an upper valve plate is arranged on the upper portion of the rotating shaft, a lower valve plate is arranged on the lower portion of the rotating shaft, and the lower valve plate is higher than the upper valve plate. The S-shaped valve plate structure with the heavy lower portion and the light upper portion is arranged in the valve body, the lower valve plate is automatically lifted and opened under the action of wind force during air suction, the lower valve plate automatically falls back under the action of self weight after air suction is finished, the lower valve plate and the upper valve plate are tightly attached to the lower baffle and the upper baffle respectively during back flushing, automatic mechanical sealing is achieved, and the valve plate is safe and reliable. Passive automatic opening and closing of the air valve are achieved, the manufacturing cost of the air valve is reduced, and the stability of the air valve is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of air valves, and specifically relates to the structure of an air valve for the air intake of a dust removal equipment. Background Technology

[0002] As the core device for dust treatment, environmental dust collectors are generally equipped with air valve structures to control the intake and exhaust of airflow, ensuring the efficiency and stability of the dust removal process. Currently, dust collectors widely adopt a "suction + back-blowing" working mode, that is, dust-laden air is drawn in through the suction port, and then the back-blowing airflow is used to remove the dust accumulated on the filter cartridge, achieving continuous dust removal and self-cleaning of the filter cartridge. In this process, the suction port air valve, as a key component connecting the dust collector to the external environment, not only undertakes the important task of opening and closing the airflow channel, but also becomes one of the most critical components in the entire dust removal system due to its frequent operation.

[0003] However, existing cartridge dust collectors generally use electro-pneumatic dampers at their air inlets. Although this type of damper meets basic control requirements to a certain extent, its inherent limitations are becoming increasingly apparent, as shown in the following aspects:

[0004] 1. Structural complexity and high cost: Electro-pneumatic valves integrate electrical control and pneumatic actuators, resulting in a complex design and numerous components. This not only increases manufacturing costs but also places higher demands on installation and maintenance.

[0005] 2. Energy efficiency issues: Under long-term operation, the electro-pneumatic valve requires a continuous power supply to maintain its control function. In addition, the air consumption of the pneumatic actuator results in low overall energy efficiency and increases operating costs.

[0006] 3. Sealing and potential malfunctions: Given the harsh working environment of the dust collector and the high dust concentration, the valves are exposed to dust for extended periods, which can easily lead to sealing problems. This can result in electrical and pneumatic malfunctions, severely affecting the stability and reliability of the dust collection equipment. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a structure for the air intake valve of a dust removal equipment, so as to solve the problems of high manufacturing and use costs and poor stability of existing electro-pneumatic air valves.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A dust removal equipment suction inlet valve structure includes:

[0010] The valve body is a frame structure with the front and rear connected. Flanges are provided on both sides of the valve body for connection to dust removal equipment or pipelines. An upper baffle is fixedly connected to the upper wall of the valve body, and a lower baffle is fixedly connected to the lower wall of the valve body. Both the upper baffle and the lower baffle are U-shaped structures, which are used to limit the upper and lower valve plates when they fall back.

[0011] A valve plate assembly is used to control the opening and closing of an air valve. The valve plate assembly includes a rotating shaft disposed inside the valve body. The two ends of the rotating shaft are rotatably connected to the valve body through bearing seats. An upper valve plate is provided on the upper part of the rotating shaft, and a lower valve plate is provided on the lower part of the rotating shaft. The height of the lower valve plate is greater than the height of the upper valve plate. The upper valve plate, the rotating shaft, and the lower valve plate are in an overall "S" shape.

[0012] Furthermore, the height ratio of the upper valve plate to the lower valve plate is 1:2.5 to 1:3.5.

[0013] Furthermore, the upper valve plate and the lower valve plate are detachably connected to the rotating shaft by fastening bolts.

[0014] Furthermore, the upper baffle is provided with an upper sealing strip on the side near the upper valve plate, and the lower baffle is provided with a lower sealing strip on the side near the lower valve plate. During the backflushing stage, the upper baffle and the lower baffle are in close contact with the upper sealing strip and the lower sealing strip.

[0015] Furthermore, the contact surfaces of the upper and lower sealing strips with the upper and lower valve plates are continuously wavy, forming a multi-stage seal between the upper and lower sealing strips and the upper and lower valve plates during backflushing.

[0016] Furthermore, the upper and lower sealing strips are hollow structures.

[0017] Furthermore, a limiting plate is provided on the upper part of the lower baffle. When the upper valve plate and the lower valve plate are rotated to a certain angle, the lower surface of the upper valve plate abuts against the limiting plate to limit the maximum opening angle of the air valve.

[0018] Furthermore, guide rods are fixedly connected to both ends of the limiting plate, and the guide rods are intermittently inserted into the lower sealing strip. An adjusting screw is threadedly connected to the middle of the limiting plate, and the upper end of the adjusting screw is rotatably connected to the valve body. An clearance groove for accommodating the adjusting screw is provided in the middle of the upper valve plate.

[0019] As a preferred embodiment of this technical solution, the upper valve plate is provided with several ventilation holes.

[0020] As another preferred embodiment of this technical solution, the upper wall of the valve body near the air inlet direction is provided with an air guide plate, and a number of ribs are provided on one side of the air guide plate. The lower end of the air guide plate is inclined towards the air outlet direction, and the lower end of the air guide plate is lower than the center line of the rotating shaft.

[0021] The beneficial effects of this utility model are:

[0022] 1) This utility model has an "S"-shaped valve plate structure with a bottom-heavy and top-light design inside the valve body. When suction is performed, the lower valve plate automatically lifts and opens under the action of wind force. After suction is completed, the lower valve plate automatically falls back under its own weight. When backflushing, the lower valve plate and the upper valve plate are respectively tightly attached to the lower baffle and the upper baffle to achieve automatic mechanical sealing. This realizes the passive automatic opening and closing of the air valve, reduces the manufacturing cost of the air valve, and ensures the stability of the air valve.

[0023] 2) The upper and lower valve plates are connected to the rotating shaft using fastening bolts. When the upper or lower valve plate is damaged, the fastening bolts are loosened and the damaged upper or lower valve plate is replaced separately, which reduces the maintenance cost of the air valve.

[0024] 3) Hollow upper and lower sealing strips are respectively installed on one side of the upper and lower baffles. The contact surfaces of the upper and lower sealing strips with the upper and lower valve plates are continuous wavy, which not only reduces the impact force and noise generated when the upper and lower valve plates directly hit the upper and lower baffles, but also ensures the sealing effect of the air valve during backflushing.

[0025] 4) An adjustable limit plate is installed on the upper part of the lower baffle to limit the maximum opening angle of the air valve, thereby controlling the air intake flow of the air valve.

[0026] 5) Ventilation holes are provided on the upper valve plate, which not only reduces the wind resistance on the upper valve plate, but also reduces the weight of the upper valve plate, further reducing the gas pressure required for the air valve to start instantly and improving the response speed of the air valve.

[0027] 6) An inclined air guide plate is installed on one side of the valve body, which not only prevents the gas from blowing directly onto the upper valve plate during the suction stage and reduces the wind resistance when the lower valve plate is opened, but also guides the gas to the lower valve plate, increasing the gas flow rate at the lower valve plate and improving the response speed of the air valve. Attached Figure Description

[0028] Appendix Figure 1 This is a schematic diagram of the structure of the air intake valve of a dust removal device according to this utility model.

[0029] Appendix Figure 2 This is a cross-sectional view of embodiment 1 of the air valve.

[0030] Appendix Figure 3 This is a schematic diagram of the assembly of the upper valve plate, lower valve plate, and bearing housing.

[0031] Appendix Figure 4 This is a schematic diagram showing the connection between the limiting plate and the lower sealing strip.

[0032] Appendix Figure 5 This is a cross-sectional view of the lower sealing strip.

[0033] Appendix Figure 6 This is a cross-sectional view of embodiment 2 of the air valve.

[0034] In the diagram, 1. Valve body; 2. Flange; 3. Upper baffle; 4. Lower baffle; 5. Upper sealing strip; 6. Lower sealing strip; 7. Rotating shaft; 8. Bearing seat; 9. Upper valve plate; 10. Ventilation hole; 11. Clearance groove; 12. Lower valve plate; 13. Fastening bolt; 14. Limiting plate; 15. Guide rod; 16. Adjusting screw; 17. Air guide plate; 18. Rib plate. Detailed Implementation

[0035] The following will be combined with the appendix Figures 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Example 1

[0038] like Figure 1 As shown, a dust removal equipment suction port valve structure includes a valve body 1 and a valve plate assembly. The valve body 1 is a frame structure with open front and rear connections. Flanges 2 are provided on both sides of the valve body 1 for connection to dust removal equipment or pipelines. Figure 2 As shown, an upper baffle 3 is fixedly connected to the upper wall of the valve body 1, and a lower baffle 4 is fixedly connected to the lower wall of the valve body 1. Both the upper baffle 3 and the lower baffle 4 are U-shaped structures, which are used to limit the upper valve plate 9 and the lower valve plate 12 when they fall back, respectively.

[0039] like Figure 2 , Figure 3As shown, the valve plate assembly includes a rotating shaft 7 disposed inside the valve body 1. The two ends of the rotating shaft 7 are rotatably connected to the valve body 1 through bearing seats 8. An upper valve plate 9 is provided on the upper part of the rotating shaft 7, and a lower valve plate 12 is provided on the lower part of the rotating shaft 7. The height of the lower valve plate 12 is greater than the height of the upper valve plate 9. The upper valve plate 9, the rotating shaft 7, and the lower valve plate 12 are in an "S" shape. Compared with the straight plate valve plate (which rotatably connects the top of a single valve plate to the valve body 1), the "S" shaped valve plate structure of this solution requires a lower gas pressure at the moment of start-up, making it easier to open and improving the response speed and dust removal efficiency of the dust removal equipment.

[0040] like Figure 2 As shown, during the suction stage, the suction fan is turned on. Since the cross-sectional area of ​​the lower valve plate 12 is larger than that of the upper valve plate 9, an asymmetric torque is generated through the airflow pressure difference (the torque of the lower valve plate 12 on the rotating shaft 7 is greater than that of the upper valve plate 9 on the rotating shaft 7), causing the rotating shaft 7 to rotate clockwise. The lower valve plate 12 is automatically lifted and opened under the action of the wind force, allowing dust to enter with the suction and pass through the air valve.

[0041] After the suction is completed, the suction fan is turned off, and the lower valve plate 12 automatically falls back under its own gravity, realizing the passive automatic opening and closing of the air valve without the need for additional driving equipment.

[0042] During the backflushing phase, the backflushing fan is turned on, and the airflow inside the dust removal equipment flows to the upper valve plate 9 and the lower valve plate 12. The torque of the lower valve plate 12 on the rotating shaft 7 is greater than the torque of the upper valve plate 9 on the rotating shaft 7. At the same time, under the limiting action of the lower baffle 4, the rotating shaft 7 cannot rotate, so that the lower valve plate 12 and the upper valve plate 9 are tightly attached to the lower baffle 4 and the upper baffle 3 respectively, realizing automatic mechanical sealing and avoiding leakage during backflushing.

[0043] The height ratio of the upper valve plate 9 to the lower valve plate 12 is 1:2.5-1:3.5, which ensures the response speed when the air valve is opened while realizing the automatic opening and closing function of the air valve.

[0044] like Figure 3 As shown, the upper valve plate 9 and the lower valve plate 12 are detachably connected to the rotating shaft 7 by fastening bolts 13. When the upper valve plate 9 or the lower valve plate 12 is damaged, the fastening bolts 13 can be loosened to replace the damaged upper valve plate 9 or the lower valve plate 12 separately, without having to replace the entire valve plate, thus reducing the maintenance cost of the air valve.

[0045] like Figure 2 As shown, the upper baffle 3 is provided with an upper sealing strip 5 on the side near the upper valve plate 9, and the lower baffle 4 is provided with a lower sealing strip 6 on the side near the lower valve plate 12. During the backflushing stage, the upper baffle 3 and the lower baffle 4 are in close contact with the upper sealing strip 5 and the lower sealing strip 6, which enhances the sealing performance of the air valve.

[0046] like Figure 5As shown, the contact surfaces of the upper sealing strip 5, the lower sealing strip 6 and the upper valve plate 9, the lower valve plate 12 are continuously wavy. During backflushing, the upper sealing strip 5, the lower sealing strip 6 and the upper valve plate 9, the lower valve plate 12 form a multi-stage seal, which further enhances the sealing effect of the air valve.

[0047] like Figure 5 As shown, the upper sealing strip 5 and the lower sealing strip 6 are hollow structures, which enhance the buffering effect when the upper valve plate 9 and the lower valve plate 12 fall back, effectively disperse and absorb the impact energy when falling back, thereby greatly reducing the impact force and noise generated when the upper valve plate 9 and the lower valve plate 12 directly hit the upper baffle 3 and the lower baffle 4.

[0048] like Figure 2 As shown, the lower baffle 4 is provided with a limiting plate 14 on its upper part. When the upper valve plate 9 and the lower valve plate 12 are rotated to a certain angle, the lower surface of the upper valve plate 9 abuts against the limiting plate 14 to limit the maximum opening angle of the air valve.

[0049] like Figure 2 , Figure 4 As shown, guide rods 15 are fixedly connected to both ends of the limiting plate 14. The guide rods 15 are intermittently inserted into the lower sealing strip 6. An adjusting screw 16 is threadedly connected to the middle of the limiting plate 14. The upper end of the adjusting screw 16 is rotatably connected to the valve body 1. The upper valve plate 9 is provided with a relief groove 11 in the middle to accommodate the adjusting screw 16. When the adjusting screw 16 is rotated, the limiting plate 14 moves up and down, thereby adjusting the maximum opening angle of the air valve and thus adjusting the air intake flow. Specifically, when the limiting plate 14 moves downward, the maximum opening angle of the air valve increases, and when the limiting plate 14 moves upward, the maximum opening angle of the air valve decreases.

[0050] During the suction phase, the gas is blown not only towards the lower valve plate but also towards the upper valve plate. When the gas blows towards the upper valve plate, it creates resistance to the opening of the damper. To reduce this resistance and improve the damper's response speed, such as... Figure 3 As shown, several ventilation holes 10 are provided on the upper valve plate 9. When the air is drawn in, the gas blown onto the upper valve plate 9 passes through the ventilation holes 10, which reduces the wind resistance on the upper valve plate 9. In addition, the upper valve plate adopts a hollow design, which reduces the weight of the upper valve plate 9, further reduces the gas pressure required for the air valve to start, and improves the response speed of the air valve.

[0051] Example 2

[0052] Unlike Example 1, in order to reduce the air resistance of the gas to the upper valve plate during air intake, such as... Figure 6As shown, the upper wall of the valve body 1 near the air inlet direction is provided with an air guide plate 17, and a number of ribs 18 are provided on one side of the air guide plate 17. The lower end of the air guide plate 17 is inclined towards the air outlet direction, and the lower end of the air guide plate 17 is lower than the center line of the rotating shaft 7. The air guide plate 17 not only avoids the gas from blowing directly onto the upper valve plate 9 during the suction stage and reduces the wind resistance when the lower valve plate 12 is opened, but also guides the gas to the lower valve plate 12, increasing the gas flow rate at the lower valve plate 12 and improving the response speed of the air valve.

[0053] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A dust removal equipment air inlet valve structure, comprising: a valve body (1), which is a frame structure with front and back communication, and is provided with flanges (2) on both sides for connection with a dust removal equipment or a pipeline; characterized in that an upper baffle (3) is fixedly connected to the upper wall of the valve body (1), and a lower baffle (4) is fixedly connected to the lower wall of the valve body (1), and the upper baffle (3) and the lower baffle (4) are both U-shaped structures for limiting the upper valve plate (9) and the lower valve plate (12) when falling back; a valve plate assembly for controlling the opening and closing of the air valve, which comprises a rotating shaft (7) arranged in the valve body (1), both ends of the rotating shaft (7) being rotatably connected with the valve body (1) through bearing seats (8), the upper valve plate (9) being arranged on the upper part of the rotating shaft (7), the lower valve plate (12) being arranged on the lower part of the rotating shaft (7), and the height of the lower valve plate (12) being greater than the height of the upper valve plate (9), the upper valve plate (9), the rotating shaft (7) and the lower valve plate (12) being in the shape of "S" as a whole.

2. The dust removal equipment air inlet damper structure according to claim 1, characterized in that, The height ratio of the upper valve plate (9) to the lower valve plate (12) is 1:2.5-1:3.

5.

3. The dust removal equipment air inlet damper structure according to claim 1, characterized in that, The upper valve plate (9) and the lower valve plate (12) are detachably connected with the rotating shaft (7) through fastening bolts (13).

4. The dust removal equipment air inlet damper structure according to claim 1, characterized in that, The side of the upper baffle (3) close to the upper valve plate (9) is provided with an upper sealing strip (5), and the side of the lower baffle (4) close to the lower valve plate (12) is provided with a lower sealing strip (6), and in the back blowing stage, the upper baffle (3) and the lower baffle (4) are tightly attached to the upper sealing strip (5) and the lower sealing strip (6).

5. The dust removal equipment air inlet damper structure according to claim 4, characterized in that, The contact surfaces of the upper sealing strip (5) and the lower sealing strip (6) with the upper valve plate (9) and the lower valve plate (12) are continuous wave shapes, and multiple levels of sealing are formed between the upper sealing strip (5), the lower sealing strip (6) and the upper valve plate (9) and the lower valve plate (12) in the back blowing.

6. The dust removal equipment air inlet damper structure according to claim 4, characterized in that, The upper sealing strip (5) and the lower sealing strip (6) are hollow structures.

7. The dust removal equipment air inlet damper structure according to claim 6, characterized in that, The upper part of the lower baffle (4) is provided with a limiting plate (14), and when the upper valve plate (9) and the lower valve plate (12) are rotated to a certain angle, the lower surface of the upper valve plate (9) abuts against the limiting plate (14) for limiting the maximum opening angle of the air valve.

8. The dust removal equipment air inlet damper structure according to claim 7, characterized in that, Both ends of the limiting plate (14) are fixedly connected with guide rods (15) which are gapingly inserted into the inside of the lower sealing strip (6), the middle part of the limiting plate (14) is threadedly connected with an adjusting screw rod (16), the upper end of the adjusting screw rod (16) is rotatably connected with the valve body (1), and the middle part of the upper valve plate (9) is provided with an avoiding groove (11) for accommodating the adjusting screw rod (16).

9. The dust removal equipment air inlet damper structure according to any one of claims 1-8, characterized in that, A plurality of ventilation holes (10) are arranged on the upper valve plate (9).

10. The dust removal equipment air inlet damper structure according to any one of claims 1-8, characterized in that, The upper wall of the side of the valve body (1) close to the air inlet direction is provided with a wind guide plate (17), one side of the wind guide plate (17) is provided with a plurality of rib plates (18), the lower end of the wind guide plate (17) is obliquely arranged to the side of the air outlet direction, and the lower end of the wind guide plate (17) is lower than the center line of the rotating shaft (7).

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