A single valve plate sealed air automatic opening and closing dust collector bypass valve

Abstract

The present invention discloses a single valve plate sealed wind automatic opening and closing dust collector bypass valve in the field of air pollutant treatment and environmental protection technology, including a dust collector and a bypass valve installed in the dust collector, the dust collector includes an air inlet flue, an inlet and outlet flue partition and an air outlet flue, the inlet and outlet flue partition is arranged between the air inlet flue and the air outlet flue, the bypass valve includes a lifting cylinder, a lifting rod, a dust collector top, an outlet flue chamber, an inlet flue chamber, a valve plate guide support, a bypass valve guide cylinder, a wedge-shaped positioning block, a valve plate guide rod, a valve body sealing convex plate, a valve plate sealing chamber inclined plate, a spring, a sealing air baffle, a sealing gasket, a guide bracket, a pressure rod, a pressure plate, a valve body sealing groove, a valve plate, and a sealing air introduction pipe, which has a simple structure and high efficiency, and can realize the automatic opening and closing function of the sealing wind of the air sealing valve. The structure is simpler than the traditional double-layer valve, more practical, and has the advantages of low cost.

Description

Technical Field

[0001] The present invention relates to the field of atmospheric pollutant treatment and environmental protection technology, and is mainly used in the field of ultra-clean emission of industrial waste gas treatment, and can also be used in other dust collection fields such as metallurgy, electric power, chemical industry, building materials, glass, food processing, etc. The present invention relates to industrial valves, bag dust collector equipment, and environmental protection equipment. Specifically, it is a single valve plate sealing wind automatic opening and closing dust collector bypass valve. Background Art

[0002] At present, the bag filter bypass sealing valves with sealing air are mostly double-layer structures, with complex double-layer valve plate structures, high weight and high manufacturing costs. At present, there is no clear description of the switch control of the sealing air duct for the bag filter bypass valve with sealing air. Most of them are manually controlled or do not control any sealing air from leaking into the dust collector body, resulting in a lower overall sealing rate of the dust collector, a higher oxygen content at the dust collector outlet, and an excessive dust content after conversion.

[0003] Based on this, the present invention designs a single valve plate sealing wind automatic opening and closing dust collector bypass valve to solve the above-mentioned problems. Summary of the invention

[0004] The purpose of the present invention is to provide a single valve plate sealed air automatic opening and closing dust collector bypass valve, which has a simple structure and high efficiency, and can realize the sealing air automatic opening and closing function of the air sealing valve. The structure is simpler than the traditional double-layer valve, more practical, and has the advantages of low cost.

[0005] To achieve the above object, the present invention provides the following technical solution: a single valve plate sealed wind automatically opens and closes a dust collector bypass valve, comprising a dust collector and a bypass valve installed in the dust collector, the dust collector comprising an air inlet flue, an inlet and outlet flue baffle and an air outlet flue, the inlet and outlet flue baffle is arranged between the air inlet flue and the air outlet flue,

[0006] The bypass valve includes a lifting cylinder, which is installed on the top of the dust collector. One end of the lifting cylinder extending into the dust collector is connected to the upper end of the lifting rod, and the lower end of the lifting rod is connected to a valve plate. The valve plate is located in the outlet flue chamber of the air outlet flue, and a valve plate guide support is fixed inside the inlet flue chamber of the air inlet flue. A bypass valve guide cylinder is provided at the bottom of the valve plate guide support, and a vertically arranged valve plate guide rod is provided on the lower side of the valve plate. The valve plate guide rod is slidably connected to the valve plate guide support, and a positioning hole is opened on the valve plate guide support. A wedge-shaped positioning block matching the positioning hole is provided on the outer wall of the valve plate guide rod.

[0007] Two valve body sealing grooves of unequal lengths are provided at the bottom of the valve plate, and two high and low valve body sealing convex plates are provided on the outer side of the valve plate guide support. The two high and low valve body sealing convex plates correspond to the two valve body sealing grooves of unequal lengths up and down and are coupled with each other. A sealing wind structure is provided on the outer side of the high valve body sealing convex plate, and the sealing wind structure is connected to one end of a sealing air inlet pipe. The other end of the sealing air inlet pipe is provided with a rain cover located outside the dust collector, and a valve plate sealing chamber inclined plate is provided at the bottom of the chamber formed by the two groups of valve body sealing convex plates.

[0008] Preferably, the valve body sealing groove is circular and arranged at the bottom of the valve plate.

[0009] Preferably, the valve plate guide support, bypass valve guide cylinder, valve body sealing convex plate, valve plate sealing chamber inclined plate, guide bracket and sealed air inlet pipe are integrated and sealed and welded to the inlet and outlet flue partitions.

[0010] Preferably, a sealing rubber strip is provided in the sealing groove of the valve body.

[0011] Preferably, a cross-shaped sliding groove is provided on the guide bracket, and the pressure rod is in a cross-shaped structure.

[0012] Preferably, the valve plate guide support is a cross-shaped structure, and a concave cone-shaped cavity is opened in the middle of the valve plate guide support.

[0013] Preferably, the slope of the inclined plate of the valve plate sealing chamber is toward the inside.

[0014] Preferably, the length of the outer angle steel of the valve body sealing groove is greater than the length of the inner angle steel.

[0015] Preferably, the other end of the sealed air inlet pipe away from the high valve body sealing convex plate extends to the top of the dust collector, and the other end is welded to the sealed air inlet pipe rain cover.

[0016] Preferably, the sealed wind structure includes a spring, a sealed air baffle, a sealing gasket, a guide bracket, a pressure rod and a pressure plate. A guide bracket is provided at one end of the sealed air inlet pipe close to the high valve body sealing convex plate, and the pressure rod passes through the inner center of the guide bracket. A sealed air baffle is provided below the guide bracket, and a sealing gasket is provided on the upper part of the sealed air baffle. The bottom end of the pressure rod passes through the bottom of the sealed air baffle and is connected by bolts. The bottom of the sealed air baffle is connected to the top of the spring, and the bottom end of the spring is fixed to the inlet and outlet flue partition.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The optimized design of the present invention adopts only one layer of valve plate, and couples two sets of valve body sealing convex plates and valve body sealing grooves to perform a double-layer sealing structure design to achieve zero leakage rate of the valve. The single valve plate structure of the valve of the present invention is lighter than the traditional double-layer sealing valve plate.

[0019] 2. The present invention controls the opening and closing of the sealed air duct by driving the valve plate up and down through the lifting cylinder and the lifting rod, effectively preventing the valve sealing air from entering the dust collector body. It also prevents the overall sealing rate of the dust collector from decreasing due to leakage of the bypass valve seal, thereby improving the conversion emission efficiency of the dust collector. It also prevents the valve sealing air from entering the dust collector body when the valve is fully opened, thereby reducing the air leakage rate of the dust collector body.

[0020] 3. The sealing air structure composed of a spring, a sealing air baffle, a sealing gasket, a guide bracket, a pressure rod and a pressure plate is arranged in the valve body structure. The opening and closing of the sealing air structure follows the automatic mechanical control of the valve plate movement to reduce the workload of equipment operation and maintenance.

[0021] 4. The double-layer sealing structure of the single-layer valve adopts a stepped design, with a valve plate sealing chamber inclined plate with a slope facing inward. The dust will fall into the dust collector under the inward slope of the valve plate sealing chamber inclined plate, which can prevent the dust in the flue gas from accumulating in the valve sealing air structure and causing blockage;

[0022] 5. A conical positioning block is arranged in the middle of the valve lifting guide rod. The positioning block on the lifting rod is connected with a concave conical hole in the middle of the valve plate guide support to improve the positioning accuracy of the upper and lower valve plates when the valve plate is about to close, thereby improving the sealing performance of the valve.

[0023] 6. The sealed air is naturally inhaled by utilizing the pressure difference between the inside and outside of the dust collector, eliminating the use of fans in traditional technology, and a rain cover is set at the sealed air inlet to prevent rainwater from flowing into the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the structure of the present invention installed on a dust collector;

[0026] Figure 2 This is a schematic diagram of the bypass valve in the closed state of the present invention;

[0027] Figure 3This is a schematic diagram of the bypass valve in the open state of the present invention;

[0028] Figure 4 This is a schematic diagram of the sealing air damper in the open state when the bypass valve of the present invention is closed;

[0029] Figure 5 This is a schematic diagram of the closed state of the sealing air damper when the bypass valve of the present invention is opened;

[0030] Figure 6 This is a schematic diagram of the wedge-shaped positioning block structure of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the inner sealing convex plate of the present invention.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 1. Bypass valve; 2. Air inlet flue; 3. Inlet and outlet flue partitions; 4. Air outlet flue; 5. Lifting cylinder; 6. Lifting rod; 7. Dust collector top; 8. Outlet flue chamber; 9. Inlet flue chamber; 10. Valve plate guide support; 11. Bypass valve guide cylinder; 12. Wedge-shaped positioning block; 13. Valve plate guide rod; 14. Valve body sealing convex plate; 15. Valve plate sealing chamber inclined plate; 16. Spring; 17. Sealing air baffle; 18. Sealing gasket; 19. Guide bracket; 20. Pressure rod; 21. Pressure plate; 22. Valve body sealing groove; 23. Valve plate; 24. Sealing air inlet pipe; 25. Sealing air inlet pipe rain cover. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-7 The present invention provides a technical solution: a single valve plate sealed wind automatically opens and closes a dust collector bypass valve, comprising a dust collector and a bypass valve 1 installed in the dust collector, characterized in that: the dust collector comprises an air inlet flue 2, an inlet and outlet flue baffle 3 and an air outlet flue 4, the inlet and outlet flue baffle 3 is arranged between the air inlet flue 2 and the air outlet flue 4,

[0036] The bypass valve 1 includes a lifting cylinder 5, a lifting rod 6, a dust collector top 7, an outlet flue chamber 8, an inlet flue chamber 9, a valve plate guide support 10, a bypass valve guide cylinder 11, a wedge-shaped positioning block 12, a valve plate guide rod 13, a valve body sealing convex plate 14, a valve plate sealing chamber inclined plate 15, a spring 16, a sealing air baffle 17, a sealing gasket 18, a guide bracket 19, a pressure rod 20, a pressure plate 21, a valve body sealing groove 22, a valve plate 23, and a sealing air inlet pipe 24. The lifting cylinder 5 is installed on the dust collector top 7, and one end of the lifting cylinder 5 extending into the dust collector is connected to the upper end of the lifting rod 6, and the lower end of the lifting rod 6 is connected to the valve plate 23. Located in the outlet flue chamber 8 of the outlet flue 4, a valve plate guide support 10 is fixed inside the inlet flue chamber 9 of the inlet flue 2, and a bypass valve guide cylinder 11 is provided at the bottom of the valve plate guide support 10. In order to prevent the valve plate 23 from being dislocated in the horizontal direction when moving up and down, a vertically arranged valve plate guide rod 13 is provided on the lower side of the valve plate 23. The valve plate guide rod 13 is slidably connected to the valve plate guide support 10. The valve plate guide support 10 is a cross-shaped structure, and the flue gas in the dust collector can pass normally. A concave cone-shaped hole is opened in the middle of the valve plate guide support 10, and a wedge-shaped positioning block 12 that matches the shape of the positioning hole is provided on the outer wall of the valve plate guide rod 13, such as Figure 2 As shown in the figure, in order to prevent the valve plate guide rod 13 from getting stuck with the valve plate guide support 10 when sliding, the inner diameter of the concave conical hole of the valve plate guide support 10 can be slightly larger. In order to prevent the concave conical hole of the valve plate guide support 10 that is too large from causing the valve plate to move horizontally, the lifting rod 6 is provided with a Figure 2 A wedge-shaped positioning block 12 is provided at the position shown. When the valve plate 23 falls and the wedge-shaped positioning block 12 approaches the valve plate guide support 10, the concave and convex wedges engage with each other and are aligned, thereby achieving the precise positioning of the valve plate 23 in the horizontal direction. Figure 6 shown.

[0037] The bottom of the valve plate 23 is provided with two valve body sealing grooves 22 of different lengths, wherein the valve body sealing grooves 22 are circularly arranged at the bottom of the valve plate 23, and a certain distance is left between the valve body sealing grooves 22, which serves as a space for sealing air to isolate the two sides of the bypass valve 1. The valve plate guide support 10, the bypass valve guide cylinder 11, the valve body sealing convex plate 14, the valve plate sealing chamber inclined plate 15, the guide bracket 19 and the sealing air introduction pipe 24 are arranged on the inlet and outlet flue partition 3, and the valve body sealing convex plate 14 is respectively divided into two high and low pieces, and the two high and low valve body sealing convex plates 14 correspond to the two valve body sealing grooves 22 of different lengths up and down, and are coupled with each other, and a sealing rubber strip is arranged in the valve body sealing groove 22, and when the bypass valve 1 is closed, the valve body sealing convex plate 14 is pressed into the sealing rubber strip in the corresponding valve body sealing groove 22 to achieve the function of sealing and isolating the air inlet flue 2 and the air outlet flue 4. A sealed air inlet pipe 24 is provided on the outer side of the high valve body sealing convex plate 14, and a guide bracket 19 is provided at one end of the sealed air inlet pipe 24 close to the high valve body sealing convex plate 14. A pressure rod 20 runs through the inner center of the guide bracket 19, and a sealed air baffle 17 is provided below the guide bracket 19. A sealing gasket 18 is provided on the upper part of the sealed air baffle 17. The bottom end of the pressure rod 20 runs through the bottom of the sealed air baffle 17 and is connected by bolts. The bottom of the sealed air baffle 17 is connected to the top of the spring 16, and the bottom end of the spring 16 is fixed to the inlet and outlet flue partition 3.

[0038] In order to prevent dust in the flue gas from accumulating on the valve, a valve plate sealing chamber inclined plate 15 is provided at the bottom of the chamber formed between the two groups of valve body sealing convex plates 14, and the slope of the valve plate sealing chamber inclined plate 15 faces inward. The middle position of the two groups of valve body sealing convex plates 14 is prone to accumulation of flue gas dust during long-term operation, resulting in a reduction or failure of the sealed air space. For this reason, the inner valve body sealing convex plate 14 is relatively low, and the outer valve body sealing convex plate 14 is relatively high. The bottom of the high and low valve body sealing convex plates 14 is fully covered by the valve plate sealing chamber inclined plate 15, and the slope faces inward. When dust accumulates, all the dust falls on the valve plate sealing chamber inclined plate 15. When the bypass valve 1 is in the open state, the dust will fall into the dust collector under the inward slope of the valve plate sealing chamber inclined plate 15, thereby avoiding the effect of dust accumulation. A small amount of dust will accumulate at the lower part of the inner valve body sealing convex plate 14, but it will not exceed the height of the inner valve body sealing convex plate 14, and will not affect the opening and closing of the bypass valve 1.

[0039] The valve plate guide support 10 , bypass valve guide cylinder 11 , valve body sealing convex plate 14 , valve plate sealing chamber inclined plate 15 , guide bracket 19 and sealed air inlet pipe 24 are integrated and sealed and welded on the inlet and outlet flue partition 3 .

[0040] The guide bracket 19 is provided with a cross-shaped slot, and the pressure rod 20 is in a cross-shaped structure. The air-sealing baffle guide bracket 19 can limit the lateral movement of the air-sealing baffle pressure rod 20 and ensure the normal circulation of air.

[0041] The length of the outer angle steel of the valve body sealing groove 22 is greater than the length of the inner angle steel, which effectively prevents dust from accumulating and getting stuck in the inner valve body sealing groove 22 .

[0042] Among them, the other end of the sealed air inlet pipe 24 away from the high valve body sealing convex plate 14 extends to the top of the dust collector, and a sealed air inlet pipe rain cover 25 is welded on the other end to protect the end of the sealed air inlet pipe 24 connected to the outside world to prevent it from being blocked by rainwater.

[0043] The specific working principle is as follows:

[0044] As attached Figure 2 The bypass valve 1 is shown in the closed state. The valve plate 23 is moved by the lifting cylinder 5. At this time, the two sets of valve body sealing convex plates 14 and valve body sealing grooves 22 are coupled, and the space in the middle is isolated from the flue gas, and is connected to the outside atmosphere through the sealed air inlet pipe 24. Since the dust collector is generally operated at negative pressure, the inside of the air inlet flue 2 and the air outlet flue 4 are also under negative pressure. The flue gas side of the valve body sealing convex plate 14 and the valve body sealing groove 22 is under negative pressure, and the air part connected to the inside is pressurized. If the sealing rubber in the valve body sealing groove 22 is damaged and aged or the valve is not closed, the air inside will enter the outside through the gap, thereby preventing the possibility of flue gas flow on both sides of the air inlet flue 2 and the air outlet flue 4, thereby achieving the zero leakage function of the bypass valve 1. Then a valve plate is used to achieve the purpose of sealing the air sealing valve.

[0045] When bypass valve 1 is closed, Figure 4 The state valve plate 23 presses down the sealed air damper pressure plate 21, driving the sealed air damper pressure rod 20 to slide downward under the limiting action of the sealed air damper guide bracket 19, and the compression spring 16 opens the sealed air damper 17 downward, and the air can enter the sealed air space of the bypass valve 1 through the sealed air inlet pipe 24, that is, the space between the two sets of valve body sealing convex plates 14 and the valve body sealing groove 22. With the action of the valve plate 23, the sealed air damper 17 is opened to realize the function of automatic opening and entry of the sealed air. When the bypass valve 1 is closed, the air inlet flue 2 and the air outlet flue 4 can be completely isolated. The flue gas passes through the internal filter element of the dust collector to realize the dust removal and filtration function.

[0046] When bypass valve 1 is open, Figure 5The status valve plate 23 is lifted, and the sealed air baffle pressure plate 21 is not subjected to external pressure. Under the action of the spring 16, the sealed air baffle 17 slides upward under the limiting action of the sealed air baffle pressure rod 20 and the sealed air baffle guide bracket 19, and finally the sealed air baffle 17 is pressed against the sealed air inlet pipe 24, and the sealed air inlet pipe 24 is tightly pressed against the sealed air baffle sealing gasket 18, so as to prevent external air from entering the dust collector body through the sealed air inlet pipe 24.

[0047] As attached Figure 3 As shown, when the lifting cylinder 5 rises, it drives the valve plate 23 to lift and open the bypass valve 1. At this time, the air inlet flue 2 and the air outlet flue 4 are connected through the bypass valve 1, so that the smoke can directly enter the air outlet flue 4 from the air inlet flue 2.

[0048] If the above mechanism is not provided, when the bypass valve 1 is opened, external air enters the dust collector body through the sealed air inlet pipe 24, causing air leakage in the dust collector.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A single valve plate sealed air automatically opens and closes a dust collector bypass valve, comprising a dust collector and a bypass valve (1) installed in the dust collector, characterized in that: The dust collector comprises an air inlet flue (2), an inlet and outlet flue baffle (3) and an air outlet flue (4), wherein the inlet and outlet flue baffle (3) is arranged between the air inlet flue (2) and the air outlet flue (4). The bypass valve (1) comprises a lifting cylinder (5), wherein the lifting cylinder (5) is mounted on the upper top (7) of the dust collector, wherein one end of the lifting cylinder (5) extending into the interior of the dust collector is connected to the upper end of a lifting rod (6), wherein the lower end of the lifting rod (6) is connected to a valve plate (23), wherein the valve plate (23) is located in an outlet flue chamber (8) of an air outlet flue (4), wherein a valve plate guide support (10) is fixed inside an inlet flue chamber (9) of an air inlet flue (2), wherein a bypass valve guide cylinder (11) is provided at the bottom of the valve plate guide support (10), wherein a vertically arranged valve plate guide rod (13) is provided at the lower side of the valve plate (23), wherein the valve plate guide rod (13) is slidably connected to the valve plate guide support (10), wherein a positioning hole is provided on the valve plate guide support (10), wherein a wedge-shaped positioning block (12) matching the positioning hole is provided on the outer wall of the valve plate guide rod (13), The bottom of the valve plate (23) is provided with two valve body sealing grooves (22) of unequal lengths, and the outer side of the valve plate guide support (10) is provided with two high and low valve body sealing convex plates (14). The two high and low valve body sealing convex plates (14) correspond to the two valve body sealing grooves (22) of unequal lengths in the upper and lower parts and are coupled to each other. A sealing wind structure is provided on the outer side of the high valve body sealing convex plate (14), and the sealing wind structure is connected to one end of the sealing air inlet pipe (24). The other end of the sealing air inlet pipe (24) is provided with a rain cover (25) located outside the dust collector. A valve plate sealing chamber inclined plate (15) is provided at the bottom of the chamber formed between the two groups of the valve body sealing convex plates (14); The sealed air structure comprises a spring (16), a sealed air baffle (17), a sealing gasket (18), a guide bracket (19), a pressure rod (20) and a pressure plate (21); a guide bracket (19) is provided at one end of the sealed air inlet pipe (24) close to the valve body sealing convex plate (14) at a high position; the pressure rod (20) passes through the inner center of the guide bracket (19); a sealed air baffle (17) is provided below the guide bracket (19); a sealing gasket (18) is provided on the upper part of the sealed air baffle (17); the bottom end of the pressure rod (20) passes through the bottom of the sealed air baffle (17) and is connected by bolts; the bottom of the sealed air baffle (17) is connected to the top end of the spring (16); the bottom end of the spring (16) is fixed to the inlet and outlet flue baffle (3); When the bypass valve (1) is closed, the valve plate (23) presses down the sealing air damper pressure plate (21), driving the sealing air damper pressure rod (20) to slide downward under the limiting action of the sealing air damper guide bracket (19), and the compression spring (16) causes the sealing air damper (17) to open downward, and air enters the sealing air space of the bypass valve (1), i.e., the space between the two groups of valve body sealing convex plates (14) and the valve body sealing groove (22), through the sealing air inlet pipe (24). The sealing air damper (17) is opened by the action of the valve plate (23), thereby realizing the function of automatically opening and entering the sealing air; When the bypass valve (1) is opened, the valve plate (23) is lifted, the sealed air baffle pressure plate (21) is not subjected to external pressure, and under the action of the spring (16), the sealed air baffle (17) slides upward under the limiting action of the sealed air baffle pressure rod (20) and the sealed air baffle guide bracket (19), and finally the sealed air baffle (17) is pressed against the sealed air inlet pipe (24), and the sealed air inlet pipe (24) is tightly pressed against the sealed air baffle sealing gasket (18), thereby preventing external air from entering the dust collector body through the sealed air inlet pipe (24).

2. According to claim 1, a single valve plate sealing air automatic opening and closing dust collector bypass valve is characterized in that: The valve body sealing groove (22) is arranged in a circular shape at the bottom of the valve plate (23).

3. According to claim 1, a single valve plate sealing air automatic opening and closing dust collector bypass valve is characterized in that: The valve plate guide support (10), the bypass valve guide cylinder (11), the valve body sealing convex plate (14), the valve plate sealing chamber inclined plate (15), the guide bracket (19) and the sealed air inlet pipe (24) are integrated and sealed and welded to the inlet and outlet flue partitions (3).

4. A single valve plate sealing air automatic opening and closing dust collector bypass valve according to claim 1, characterized in that: A sealing rubber strip is arranged in the valve body sealing groove (22).

5. According to claim 1, a single valve plate sealing air automatic opening and closing dust collector bypass valve is characterized in that: The guide bracket (19) is provided with a cross-shaped sliding groove, and the pressure rod (20) is in a cross-shaped structure.

6. A single valve plate sealing air automatic opening and closing dust collector bypass valve according to claim 1, characterized in that: The valve plate guide support (10) is a cross-shaped structure, and a concave cone-shaped cavity is opened in the middle of the valve plate guide support (10).

7. According to claim 1, a single valve plate sealing air automatic opening and closing dust collector bypass valve is characterized in that: The slope of the inclined plate (15) of the valve plate sealing chamber is directed inward.

8. The single valve plate sealing air automatic opening and closing dust collector bypass valve according to claim 1, characterized in that: The length of the outer angle steel of the valve body sealing groove (22) is greater than the length of the inner angle steel.

9. The single valve plate sealing air automatic opening and closing dust collector bypass valve according to claim 1, characterized in that: The other end of the sealed air inlet pipe (24) away from the valve body sealing convex plate (14) at a high position extends to the top of the dust collector, and the other end is welded to the sealed air inlet pipe rain cover (25).

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