Automatic blowing and blocking valve for ash pipeline

Abstract

The utility model discloses an automatic blowing and blocking valve for an ash pipeline, which comprises a valve body and an end cover, the valve body is provided with an air inlet cavity and an air outlet cavity which are communicated with each other, a pushing cavity is arranged between the end cover and the valve body, the valve body is provided with an air outlet I communicated with the air outlet cavity, and the lower part of the air outlet I is provided with an anti-blocking component; the anti-blocking assembly comprises a shell, and an air outlet II and an anti-blocking valve assembly are arranged in the shell; the anti-blocking valve assembly is arranged between the air outlet I and the air outlet II; the anti-blocking valve assembly comprises an elastic piece, a base plate piece, an anti-blocking valve sealing ring and a connecting bolt, a groove is formed in the inner ring of the anti-blocking valve sealing ring, the elastic piece is arranged on the lower portion of the base plate piece and connected with the base plate piece through the connecting bolt, and the base plate piece is arranged in the groove of the anti-blocking valve sealing ring in a sleeved mode. According to the scheme, an anti-blocking isolation structure of a tower spring and a glass ball in the prior art is replaced by the designed anti-blocking assembly, it is effectively guaranteed that the problem that the tower spring is stuck and fails due to the fact that ash is accumulated on the tower spring is solved, and it is guaranteed that the blowing assisting valve can work stably.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic ash conveying, in particular to an automatic blow - blocking valve for ash pipelines. Background Art

[0002] The pneumatic ash conveying system in thermal power plants generally transports high - concentration materials based on the pneumatic conveying principle of gas - solid two - phase flow, through the static pressure and dynamic pressure of compressed air. This ash conveying method has problems such as pipe blockage, wear, and large gas consumption. Especially the pipe blockage problem, if not dealt with in time, will cause the ash in the ash hopper to accumulate. After the fluidity of the ash becomes poor, the temperature will further drop, exacerbating the accumulation of ash materials.

[0003] The Chinese utility model with the application number: CN202220391326.1 discloses a pilot - type ash conveying air - supplementing device, which includes a valve body with a hollow structure. A pilot valve is arranged on the right side of the valve body, and a pressure gauge is arranged on the left side; the pilot valve includes a hollow - structured pilot valve cover connected to the right end face of the valve body. A spring seat is thread - sleeved on the right end of the pilot valve cover; a compression spring is arranged at one end of the spring seat located inside the pilot valve cover, and a valve core is arranged at the other end of the compression spring; one end of the valve core is slidably arranged inside the pilot valve cover, and the other end is slidably arranged inside the valve body; an air outlet seat is arranged at the lower end of the valve body. The air outlet seat includes a hollow - structured air outlet end seat, and a tower spring is clamped inside the air outlet end seat; one end of the tower spring abuts against the inner card slot of the air outlet end seat, and the other end abuts against a glass ball; the glass ball abuts against the valve body end face.

[0004] However, in the above - mentioned solution, the tower spring and the glass ball are used to isolate the cavity inside the valve body from the ash conveying pipeline. However, during the operation of the ash conveying pipeline and when the ash conveying pipeline is blocked, the ash in the ash conveying pipeline will enter the position of the tower spring and accumulate. The ash will continuously accumulate in the tower spring, eventually jamming the entire tower spring, resulting in the loss of the telescopic ability of the tower spring. Finally, when the ash conveying pipeline is blocked, the tower spring cannot be compressed, causing the entire valve body to lose the ability to assist in blowing. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] The technical problem to be solved by the utility model is that in the prior art, the tower spring and the glass ball are used to isolate the cavity inside the valve body from the ash conveying pipeline. However, during the operation of the ash conveying pipeline and when the ash conveying pipeline is blocked, the ash in the ash conveying pipeline will enter the position of the tower spring and accumulate. The ash will continuously accumulate in the tower spring, eventually jamming the entire tower spring, resulting in the loss of the telescopic ability of the tower spring. Finally, when the ash conveying pipeline is blocked, the tower spring cannot be compressed, causing the entire valve body to lose the ability to assist in blowing.

[0007] (2) Technical Solution

[0008] To solve the above problems, the present utility model provides the following technical solution:

[0009] An automatic blow - plug valve for grey matter pipeline includes a valve body and an end cover. The valve body is fixedly connected to the end cover. An air inlet cavity and an air outlet cavity are provided on the valve body and are connected to each other. A push cavity is provided between the end cover and the valve body. An air inlet hole 1 is also provided on the valve body. One end of the air inlet hole 1 is connected to the air inlet cavity, and the other end is connected to the push cavity. The air outlet cavity is connected to the middle part of the air inlet hole 1;

[0010] A piston cavity 1 is also provided on the valve body. A main piston that can move back and forth is arranged in the piston cavity 1. The push cavity is arranged between the main piston and the end cover;

[0011] An air outlet 1 connected to the air outlet cavity is provided on the valve body. A anti - blockage component is arranged below the air outlet 1;

[0012] The anti - blockage component includes a housing fixedly connected to the valve body. An air outlet 2 and an anti - blockage valve component are arranged in the housing;

[0013] The anti - blockage valve component is arranged between the air outlet 1 and the air outlet 2;

[0014] The anti - blockage valve component includes an elastic sheet, a chassis sheet, an anti - blockage valve sealing ring with a groove on the inner circle, and a connecting bolt. The elastic sheet is arranged below the chassis sheet and is connected to the chassis sheet through the connecting bolt. The chassis sheet is sleeved in the groove of the anti - blockage valve sealing ring;

[0015] A plurality of soot - blowing ventilation holes are provided on the chassis sheet. The elastic sheet covers the plurality of soot - blowing ventilation holes on the chassis sheet;

[0016] The elastic sheet is made of a soft material, and the chassis sheet is made of a metal material;

[0017] A connecting rod is provided at one end of the main piston close to the air outlet cavity. The connecting rod can move back and forth together with the main piston;

[0018] A connecting sleeve is provided at one end of the connecting rod close to the air inlet cavity. The connecting sleeve is sleeved on one end of the connecting rod, and the connecting sleeve can move back and forth together with the main piston;

[0019] A sub - piston is provided at one end of the connecting sleeve away from the connecting rod. One end of the connecting sleeve away from the connecting rod abuts against one end face of the sub - piston close to the connecting rod sleeve;

[0020] An adjusting nut is further provided at one end of the air inlet chamber, and the adjusting nut is connected to the valve body by a threaded connection. A spring is provided between the adjusting nut and the secondary piston, and both ends of the spring respectively press against the adjusting nut and the secondary piston.

[0021] Furthermore, a first vent is provided on the first air outlet, and the first vent runs through the valve body in one direction. A second vent is provided on the end cover, and the second vent extends to the push cavity.

[0022] Furthermore, a sealing gasket is provided between the end cover and the main piston. The sealing gasket is arranged between the push chamber and the main piston, and a side of the sealing gasket close to the main piston is in contact with a side of the main piston close to the end cover.

[0023] Furthermore, the valve body is provided with an adjusting hole, the adjusting hole is connected to the air inlet hole, and a flow regulating valve is provided in the adjusting hole.

[0024] Furthermore, a sealing ring 1 is provided at the middle of the connecting rod, and a sealing ring 2 is provided on the main piston.

[0025] Furthermore, the end cover is provided with an air inlet hole 2, one end of the air inlet hole 2 is connected to the push cavity, and the end of the air inlet hole 1 close to the end cover passes through the sealing gasket and is connected to the air inlet hole 2.

[0026] Furthermore, one end of the adjusting nut away from the spring is connected to an external air supply device, and the second air outlet is connected to an external ash conveying pipe through a pipe.

[0027] (3) Beneficial effects

[0028] The beneficial effect of the present invention is that the anti-blocking isolation structure of the tower spring and the glass ball in the prior art is replaced by the designed anti-blocking component, which effectively solves the problem that the tower spring is stuck and fails due to the accumulation of dust on the tower spring, and ensures that the blowing valve can work stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a cross-sectional view of the utility model;

[0030] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0031] Figure 3 It is a structural diagram of the anti-blocking component of the utility model;

[0032] Figure 4 This is a structural diagram of the anti-blocking valve assembly of the utility model;

[0033] Figure 5 It is a schematic connection diagram of the cushion block and the anti-blocking valve assembly of the present utility model;

[0034] Figure 6 It is a schematic diagram of the connection mode between multiple blowing valves of the present utility model, the connection between the blowing valve and the gas source pipe, and the ash conveying pipe.

[0035] Markings in the figure: 1-valve body, 2-end cover, 3-pushing cavity, 4-first air inlet hole, 5-air inlet cavity, 6-air outlet cavity, 7-first piston cavity, 8-main piston, 9-first air outlet, 10-anti-blocking assembly, 11-link, 12-connecting sleeve, 13-secondary piston, 14-adjusting nut, 15-spring, 16-first ventilation port, 17-second ventilation port, 18-sealing gasket, 19-adjusting hole, 20-flow regulating valve, 21-first sealing ring, 22-second sealing ring, 23-second air inlet hole, 24-cushion block, 25-gas source pipe, 26-ash conveying pipe, 28-first connecting air pipe, 29-second connecting air pipe.

[0036] 1001-housing, 1002-second air outlet, 1003-anti-blocking valve assembly;

[0037] 1003a-elastic sheet, 1003b-chassis sheet, 1003c-connecting bolt, 1003d-blowing ash ventilation port. Specific embodiments

[0038] 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.

[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0040] Please refer to Figures 1-4, An automatic blow - blocking valve for gray matter pipeline shown, includes a valve body 1 and an end cover 2. The valve body 1 and the end cover 2 are fixedly connected. An air inlet chamber 5 and an air outlet chamber 6 are provided on the valve body 1 and are connected to each other. The air inlet chamber 5 is connected to an external air source pipe 25. A push chamber 3 is provided between the end cover 2 and the valve body 1. An air inlet hole one 4 is also provided on the valve body 1. One end of the air inlet hole one 4 is connected to the air inlet chamber 5, and the other end is connected to the push chamber 3. The air outlet chamber 6 is connected to the middle of the air inlet hole one 4.

[0041] A piston chamber one 7 is also provided on the valve body 1. A main piston 8 that can move back and forth is arranged in the piston chamber one 7. The push chamber 3 is arranged between the main piston 8 and the end cover 2; when the pressure in the push chamber 3 reaches the value that can push the main piston 8, the main piston 8 is pushed to move in the piston chamber one 7 towards the air inlet chamber 5.

[0042] An air outlet one 9 connected to the air outlet chamber 6 is provided on the valve body 1. A dust - proof component 10 is arranged below the air outlet one 9. The dust - proof component 10 is mainly used to prevent the dust in the ash - conveying pipeline from entering the interior of the valve body 1, damaging the ash - conveying valve, and causing it to lose the ability of auxiliary blowing.

[0043] The dust - proof component 10 includes a housing 1001 fixedly connected to the valve body 1. An air outlet two 1002 and a dust - proof valve component 1003 are arranged in the housing 1001. The air outlet two 1002 is connected to the ash - conveying pipe.

[0044] The dust - proof valve component 1003 is arranged between the air outlet one 9 and the air outlet two 1002. The dust - blocking component 1003 is arranged between the air outlet one 9 and the air outlet two 1002, which can effectively prevent the gray matter in the gray - matter conveying pipe 26 from entering the air outlet hole one 9, avoiding the situation of blockage of the chambers inside the auxiliary blowing valve caused by the gray matter.

[0045] In order to enable the dust - proof valve component 1003 to achieve the function of a one - way valve, when the dust - proof valve component 1003 is arranged, it includes an elastic sheet 1003a, a chassis sheet 1003b, a dust - proof valve sealing ring 1003e with a groove on the inner circle, and a connecting bolt 1003c. The elastic sheet 1003a is arranged below the chassis sheet 1003b and is connected to the chassis sheet 1003b through the connecting bolt 1003c. A plurality of ash - blowing air vents 1003d are provided on the chassis sheet 1003b. The elastic sheet 1003a is made of a soft material, and the chassis sheet 1003b is made of a metal material. The elastic sheet 1003a covers a plurality of ash - blowing air vents 1003d on the chassis sheet 1003b. The chassis sheet 1003b is sleeved in the groove of the dust - proof valve sealing ring 1003e.

[0046] When the high-pressure gas in the first air outlet 9 needs to rush out to blow and clean the blockage in the ash conveying pipe 26, a large amount of high-pressure gas flows from the soot blowing vent 1003d towards the elastic piece 1003a, pushing open and deforming the elastic piece 1003a, creating a gap between the elastic piece 1003a and the chassis piece 1003b. The high-pressure air quickly flows through the gap into the second air outlet 1002 and blows towards the ash conveying pipe 26 to clean the blockage.

[0047] One end of the main piston 8 close to the air outlet cavity 6 is provided with a connecting rod 11. The connecting rod 11 can move back and forth together with the main piston 8. One end of the connecting rod 11 close to the air inlet cavity 5 is provided with a connecting sleeve 12. The connecting sleeve 12 is sleeved on one end of the connecting rod 11, and the connecting sleeve 12 can move back and forth together with the main piston 8. One end of the connecting sleeve 12 away from the connecting rod 11 is provided with a secondary piston 13. One end of the connecting sleeve 12 away from the connecting rod 11 abuts against an end face of the secondary piston 13 close to the connecting rod 11 sleeve. When the main piston 8 moves, it pushes the secondary piston 13 to move through the connecting rod 11.

[0048] One end of the air inlet cavity 5 is also provided with an adjusting nut 14. The adjusting nut 14 is connected to the valve body 1 by means of a threaded connection, and a spring 15 is provided between the adjusting nut 14 and the secondary piston 13. Both ends of the spring 15 abut against the adjusting nut 14 and the secondary piston 13 respectively.

[0049] Specifically, a first vent 16 is provided on the first air outlet 9. The first vent 16 penetrates the valve body 1 unidirectionally. A second vent 17 is provided on the end cover 2, and the second vent 17 extends into the pushing cavity 3.

[0050] In this implementation scheme, when specifically applied, multiple auxiliary blowing valves will be set on the ash conveying pipe 26, and each auxiliary blowing valve is connected. In order to realize the connection function between each ash conveying valve, the first vent 16 on the previous auxiliary blowing valve is connected to the second vent 17 on the next auxiliary blowing valve through a connecting air pipe 28.

[0051] Specifically, a gasket 18 is also provided between the end cover 2 and the main piston 8. The gasket 18 is arranged between the pushing cavity 3 and the main piston 8, and one side of the gasket 18 close to the main piston 8 is in contact with one side of the main piston 8 close to the end cover 2.

[0052] In this implementation scheme, in order to ensure that the gas in the pushing cavity 3 does not flow into the first piston cavity 7, a gasket 18 is provided to isolate the pushing cavity 3 from the first piston cavity. The gasket 18 is made of rubber material to ensure that when the air pressure in the pushing cavity 3 increases, it can push the gasket 18 to deform so as to achieve the purpose of pushing the main piston 8.

[0053] Specifically, an adjustment hole 19 is further provided on the valve body 1. The adjustment hole 19 is communicated with the first air inlet hole 4, and a flow regulating valve 20 is arranged in the adjustment hole 19.

[0054] In this embodiment, the gas flow rate in the first air inlet hole 4 can be adjusted by the arrangement of the adjustment hole 19 and the flow regulating valve 20.

[0055] Specifically, a first sealing ring 21 is arranged in the middle of the connecting rod 11, and a second sealing ring 22 is arranged on the main piston 8.

[0056] In this embodiment, the first sealing ring 21 and the second sealing ring 22 are mainly used for sealing, which belongs to conventional technical means and will not be elaborated in this case.

[0057] Specifically, a second air inlet hole 23 is provided on the end cover 2. One end of the second air inlet hole 23 is communicated with the pushing cavity 3, and one end of the first air inlet hole 4 close to the end cover 2 penetrates through the sealing gasket 18 and is communicated with the second air inlet hole 23.

[0058] In this embodiment, in order to facilitate the gas in the first air inlet 4 to flow into the pushing cavity 3, a second air inlet hole 23 is provided on the end cover to facilitate the gas flow.

[0059] Specifically, the end of the adjusting nut 14 away from the spring 15 is connected to an external gas supply device, and the second air outlet 1002 is connected to an external ash conveying pipe 26 through a pipe fitting.

[0060] Specifically, please refer to Figure 5 To further prevent the ash in the ash conveying pipe 26 from entering the inside of the air assist valve, an anti-blocking component 10 is additionally provided and connected to the valve body 1 through a cushion block 24. Specifically, when designing, there is a cushion block 24 between the anti-blocking component 10 and the valve body 1. A anti-blocking valve component 1003 is also provided on the cushion block 24. The outer shell 1001 on the anti-blocking component 10 and the cushion block 24 are connected to the valve body 1 through bolts together, and the cushion block 24 is provided with a groove for installing and placing a anti-blocking valve component 1003. The anti-blocking valve component 1003 is installed in the groove by an interference fit method.

[0061] Working principle:

[0062] When specifically applied, multiple air assist valves in this case are provided on the ash conveying pipe 26, and each air assist valve is communicated with each other. To realize the communication function between each air assist valve, please refer to Figure 6 and Figures 1 to 5, the air vent 16 on the valve body 1 is connected to the air vent 17 on the next auxiliary blowing valve through the connecting air pipe 28. The position of the adjusting nut 14 on each auxiliary blowing valve is connected to the air source pipe 25 through the second connecting air pipe 29, and the air outlet 1002 on each anti-blocking component 10 is also connected to the ash conveying pipe 28 through an air pipe.

[0063] During normal operation, the high-pressure air in the air source pipe 25 is continuously delivered to the intake cavity 5, then enters the intake hole 23 through the first intake hole 4, and thus enters the pushing cavity 3. At this time, since there is no blockage inside the ash conveying pipe 26, the gas pressure entering the pushing cavity 3 cannot push the main piston 8 to move. At this time, a small amount of gas in the first intake hole 4 flows into the outlet cavity 6 and flows into the anti-blocking component 10. The small amount of gas pushes the elastic sheet 1003a made of soft material open a little, and continuously flows from the soot blowing vent 1003d into the ash conveying pipe 26 through the second air outlet 1002, providing a small amount of air supplement for the ash conveying pipe 26.

[0064] When there is a blockage of materials in the ash conveying pipe 26, the pressure in the ash conveying pipe 26 increases and is greater than the pressure of the small amount of flowing gas delivered to the ash conveying pipe 26, so that the elastic sheet 1003a is pressed against the bottom plate sheet 1003b, completely covering the soot blowing vent 1003d. The small amount of gas cannot continue to enter the ash conveying pipe 26. Then, since the gas in the air source pipe 25 is continuously delivered to the auxiliary blowing valve, the gas pressure entering the first intake hole 4 continuously increases, and then the pressure in the pushing cavity 3 continuously increases, so that a pushing force is applied to the side of the main piston 8 with a larger cross-sectional area. As the gas pressure in the pushing cavity 3 continuously increases, when the thrust received by the side of the main piston 8 with a larger cross-sectional area is greater than the elastic force of the spring 15, the main piston 8 pushes the connecting rod 11 to drive the auxiliary piston 13 to move towards the spring 15. Then the spring 15 is compressed. After the spring 15 is compressed, a gap appears between the auxiliary piston 13 and the outlet cavity 6. At this time, a large amount of air source continuously flows into the outlet cavity 6 from the gap, and quickly pushes the elastic sheet 1003a on the anti-blocking valve component 1003 open, allowing a large amount of these gases to be blown out from the soot blowing vent 1003d, providing a large amount of high-pressure gas to the ash conveying pipe 26 to blow away the blockage and achieve the purpose of blowing and unblocking.

[0065] While the ash conveying pipe 26 is blocked, high-pressure gas flows from the first vent 16 to the second vent 17 on the next air-assist valve. Before the blockage moves to the position of the next air-assist valve, the high-pressure gas is conveyed to the pushing chamber 3 of the next air-assist valve in advance by connecting the first vent 16 with the second vent 17 of the next air-assist valve. Then, the spring 15 on the next air-assist valve is pushed, so that a large amount of gas is also quickly conveyed from the anti-blocking component 10 into the ash conveying pipe 26, achieving the purpose of cleaning the ash in the ash conveying pipe 26 in advance, realizing the pre-cleaning of the ash conveying pipe 26, and making the blowing of the blockage more convenient.

[0066] After the blockage in the ash conveying pipe 26 is cleaned and blown away, the pressure in the ash conveying pipe 26 drops, the main piston 8 loses the thrust, the spring 15 returns from the compressed state to the initial state, and the auxiliary piston 13 separates the air inlet chamber 5 from the air outlet chamber 6, and the air pressure state inside the whole air-assist valve returns to the micro-flow state.

[0067] During the process of the whole air-assist valve assisting in blowing the blockage, a small amount of ash in the ash conveying pipe 26 will enter the second air outlet 1002, but during the air-assist, this ash will be washed away by a large amount of high-pressure gas. Compared with the prior art structure using a spring and a sphere, it can well solve the situation where the ash gets stuck in the spring, causing the spring to fail to be compressed and thus unable to achieve air-assist.

[0068] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0069] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic blow - blocking valve for gray matter pipeline, comprising a valve body (1) and an end cover (2), wherein the valve body (1) and the end cover (2) are fixedly connected, and it is characterized in that: An air inlet cavity (5) and an air outlet cavity (6) which are communicated with each other are provided on the valve body (1). A pushing cavity (3) is provided between the end cover (2) and the valve body (1). An air inlet hole one (4) is further provided on the valve body (1). One end of the air inlet hole one (4) is communicated with the air inlet cavity (5), and the other end is communicated with the pushing cavity (3). The air outlet cavity (6) is communicated with the middle part of the air inlet hole one (4). A piston cavity one (7) is further provided on the valve body (1). A main piston (8) which can move back and forth is arranged in the piston cavity one (7). The pushing cavity (3) is arranged between the main piston (8) and the end cover (2). An air outlet one (9) which is communicated with the air outlet cavity (6) is provided on the valve body (1). An anti-blocking component (10) is arranged below the air outlet one (9). The anti-blocking component (10) includes a housing (1001) fixedly connected to the valve body (1). An air outlet two (1002) and an anti-blocking valve component (1003) are arranged in the housing (1001). The anti-blocking valve component (1003) is arranged between the air outlet one (9) and the air outlet two (1002). The anti-blocking valve component (1003) includes an elastic sheet (1003a), a chassis sheet (1003b), an anti-blocking valve sealing ring (1003e) with a groove on the inner circle, and a connecting bolt (1003c). The elastic sheet (1003a) is arranged below the chassis sheet (1003b) and is connected to the chassis sheet (1003b) through the connecting bolt (1003c). The chassis sheet (1003b) is sleeved in the groove of the anti-blocking valve sealing ring (1003e). A plurality of soot blowing air vents (1003d) are provided on the chassis sheet (1003b). The elastic sheet (1003a) covers the plurality of soot blowing air vents (1003d) on the chassis sheet (1003b). The elastic sheet (1003a) is made of a soft material, and the chassis sheet (1003b) is made of a metal material. A connecting rod (11) is provided at one end of the main piston (8) close to the air outlet cavity (6). The connecting rod (11) can move back and forth together with the main piston (8). A connecting sleeve (12) is provided at one end of the connecting rod (11) close to the air inlet cavity (5). The connecting sleeve (12) is sleeved at one end of the connecting rod (11), and the connecting sleeve (12) can move back and forth together with the main piston (8). A sub-piston (13) is provided at one end of the connecting sleeve (12) away from the connecting rod (11). One end of the connecting sleeve (12) away from the connecting rod (11) abuts against an end face of the sub-piston (13) close to the connecting rod (11) sleeve. One end of the intake cavity (5) is also provided with an adjusting nut (14). The adjusting nut (14) is connected to the valve body (1) by means of a threaded connection. A spring (15) is provided between the adjusting nut (14) and the auxiliary piston (13). Two ends of the spring (15) are respectively abutted against the adjusting nut (14) and the auxiliary piston (13).

2. The automatic blow - blocking valve for gray matter pipeline according to claim 1, wherein: One air vent one (16) is provided on the air outlet one (9). The air vent one (16) penetrates through the valve body (1) unidirectionally. An air vent two (17) is provided on the end cover (2). The air vent two (17) extends into the pushing cavity (3).

3. The automatic blow - blocking valve for gray matter pipeline according to claim 1, characterized in that: A gasket (18) is further provided between the end cover (2) and the main piston (8). The gasket (18) is arranged between the pushing cavity (3) and the main piston (8). One side surface of the gasket (18) close to the main piston (8) is in contact with one side surface of the main piston (8) close to the end cover (2).

4. The automatic blow-off and blockage clearing valve for gray matter pipelines according to claim 3, wherein: An adjusting hole (19) is further provided on the valve body (1). The adjusting hole (19) is communicated with the intake hole one (4). A flow regulating valve (20) is arranged in the adjusting hole (19).

5. The automatic blow-off and blockage clearing valve for grey matter pipeline according to claim 1, characterized in that: A seal ring one (21) is arranged in the middle of the connecting rod (11). A seal ring two (22) is arranged on the main piston (8).

6. The automatic blow-off and blockage valve for gray matter pipeline according to claim 3, characterized in that: An intake hole two (23) is provided on the end cover (2). One end of the intake hole two (23) is communicated with the pushing cavity (3). One end of the intake hole one (4) close to the end cover (2) penetrates through the gasket (18) and is communicated with the intake hole two (23).

7. The automatic blow-off and blockage valve for grey matter pipeline according to claim 1, characterized in that: One end of the adjusting nut (14) away from the spring (15) is connected to an external air supply device. The air outlet two (1002) is connected to an external ash conveying pipe through a pipe fitting.

8. The automatic blow - blocking valve for grey matter pipeline according to claim 1, characterized in that: A cushion block (24) is further provided between the anti-blocking assembly (10) and the valve body (1). An anti-blocking valve assembly (1003) is also provided on the cushion block (24). The outer shell (1001) on the anti-blocking assembly (10) and the cushion block (24) are jointly connected to the valve body (1) by bolts. A groove for installing and placing an anti-blocking valve assembly (1003) is provided on the cushion block (24). The anti-blocking valve assembly (1003) is installed in the groove by means of interference fit.

Images