Automatic dredging valve for material pneumatic conveying pipe

Abstract

The utility model discloses an automatic dredging valve for a material pneumatic conveying pipe. Belongs to the technical field of pneumatic conveying pipe dredging. The device is technically characterized by comprising a plurality of air conveying pipes which are communicated and connected to the side wall of a material conveying pipeline, and the other ends of the air conveying pipes are connected with an external compressed air source; a valve plate is arranged in the gas conveying pipe, and a pneumatic opening and closing assembly matched with the valve plate is arranged on the outer wall of the gas conveying pipe; a bypass pipe communicated with the pneumatic opening and closing assembly is arranged at the end, close to the material conveying pipeline, of the air conveying pipe. The utility model aims to provide the automatic dredging valve for the material pneumatic conveying pipe, which is simple in structure and quick in dredging. The device is used for automatically dredging the blocked position of the pneumatic conveying pipe.

Description

Technical Field

[0001] The utility model relates to a blockage removal valve, and more specifically, to an automatic blockage removal valve for a material pneumatic conveying pipe. Background Art

[0002] The traditional material pneumatic conveying distance cannot be too long, and the conveying pipe is often blocked. Moreover, the conveying system does not know the specific position of the blocked pipe. After the blockage, the pipe needs to be cut for dredging. This blockage removal method is inefficient, and the pipe cutting needs to be carried out during shutdown, which will affect the production, increase the cost, and easily cause powder leakage and environmental pollution. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an automatic blockage removal valve for a material pneumatic conveying pipe with a simple structure and fast blockage removal in view of the above-mentioned deficiencies of the prior art.

[0004] The technical solution of the utility model is realized as follows: an automatic blockage removal valve for a material pneumatic conveying pipe includes a plurality of gas transmission pipes conductively connected to the side wall of the material conveying pipeline, and the other end of the gas transmission pipe is connected to an external compressed air source; a valve disc is arranged in the gas transmission pipe, and a pneumatic opening and closing assembly matched with the valve disc is arranged on the outer wall of the gas transmission pipe; a bypass pipe conductively connected to the pneumatic opening and closing assembly is arranged at one end of the gas transmission pipe close to the material conveying pipeline.

[0005] In the above-mentioned automatic blockage removal valve for a material pneumatic conveying pipe, the valve disc is a diaphragm made of a flexible material; a through hole is arranged on the side wall of the gas transmission pipe, and a mounting table is arranged on the outer wall of the gas transmission pipe around the through hole; the pneumatic opening and closing assembly is arranged on the mounting table, and the valve disc is arranged between the pneumatic opening and closing assembly and the mounting table.

[0006] In the above-mentioned automatic blockage removal valve for a material pneumatic conveying pipe, a funnel-shaped throttling part is arranged in the gas transmission pipe, and the valve disc is arranged in the middle of the throttling part.

[0007] In the above-mentioned automatic blockage removal valve for a material pneumatic conveying pipe, the pneumatic opening and closing assembly includes a mounting cylinder arranged on the outer wall of the gas transmission pipe, a cylinder block is arranged at the upper end of the mounting cylinder, and the air inlet of the cylinder block is connected to the bypass pipe; a piston rod connected to the valve disc is arranged in the cylinder block; a diaphragm is arranged in the middle of the cylinder block, the inner end of the piston rod is connected to the diaphragm, and a return spring is connected between the diaphragm and the inner bottom surface of the cylinder block.

[0008] In the above-mentioned automatic blockage removal valve for a material pneumatic conveying pipe, a guide sleeve is arranged at the bottom of the cylinder block, the piston rod is arranged in the guide sleeve, and a sealing packing is arranged in the guide sleeve.

[0009] In the above-mentioned automatic blockage removal valve for a material pneumatic conveying pipe, a bypass thin pipe is conductively connected between one side of the air delivery pipe close to the external compressed air source and the cylinder block, and a throttle valve is provided on the bypass thin pipe.

[0010] In the above-mentioned automatic blockage removal valve for a material pneumatic conveying pipe, the rear end of the cylinder block is threadedly connected with an adjusting rod. An adjusting push plate cooperating with a return spring is provided at one end of the adjusting rod located inside the cylinder block, and an adjusting turning handle is provided at the other end of the adjusting rod.

[0011] After the present utility model adopts the above structure, when the material conveying pipe at the front end of the air delivery pipe is blocked, the conveying air flow will enter the bypass pipe to push the pneumatic opening and closing assembly to open the valve plate, so that the compressed air automatically purges the blocked part of the material conveying pipe, which can effectively improve the dredging efficiency.

[0012] At the same time, this blockage removal method does not require cutting the pipe for dredging, does not affect production, can reduce the blockage removal cost, and there is no need to worry about powder leakage during blockage removal, and it will not cause environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The following further detailed description of the present utility model is given with reference to the embodiments in the drawings, but it does not constitute any limitation to the present utility model.

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic cross-sectional structural diagram of the present utility model;

[0016] Figure 3 is a partial structural schematic diagram at position A of the present utility model.

[0017] In the figure: 1, air delivery pipe; 2, valve plate; 3, pneumatic opening and closing assembly; 3a, mounting cylinder; 3b, cylinder block; 3c, piston rod; 3d, diaphragm; 3e, return spring; 4, bypass pipe; 5, through hole; 6, mounting table; 7, throttling part; 8, guiding sleeve; 9, sealing packing; 10, bypass thin pipe; 11, throttle valve; 12, adjusting rod; 13, adjusting push plate; 14, adjusting turning handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Refer to Figures 1-3As shown in the figure, an automatic blockage removal valve for a pneumatic material conveying pipe of the present utility model includes a plurality of air conveying pipes 1 conductively connected to the side wall of the material conveying pipe, and the other end of the air conveying pipe 1 is connected to an external compressed air source; a valve plate 2 is arranged in the air conveying pipe 1, and a pneumatic opening and closing assembly 3 matched with the valve plate 2 is arranged on the outer wall of the air conveying pipe 1; a bypass pipe 4 communicated with the pneumatic opening and closing assembly 3 is arranged at one end of the air conveying pipe 1 close to the material conveying pipe. When the material conveying pipe at the front end of the air conveying pipe is blocked, the conveying pressure of the conveying pipe will increase, the conveying air flow enters the air conveying pipe and pushes the pneumatic opening and closing assembly to open the valve plate through the bypass pipe, and the compressed air purges the material conveying pipe. When the material conveying pipe is dredged, the pressure drops and the valve plate automatically closes to block the compressed air. The whole blockage removal process is automated, which can effectively improve the dredging efficiency.

[0019] In order to increase the impact force of the compressed air on the blocked part in the material conveying pipe, the air conveying pipe is inclinedly arranged on the material conveying pipe, so that the compressed air blows obliquely towards the blocked material. Through experiments, it is found that when the inclination angle between the air conveying pipe and the material conveying pipe is set between 20-30°, the blockage removal effect is the best.

[0020] At the same time, this blockage removal method does not require cutting the pipe for dredging, does not affect production, can reduce the blockage removal cost, and there is no need to worry about powder leakage during blockage removal, and it will not cause environmental pollution.

[0021] In this embodiment, the valve plate 2 is a diaphragm made of a flexible material; a through hole 5 is arranged on the side wall of the air conveying pipe 1, and an installation table 6 is arranged on the outer wall of the air conveying pipe 1 around the through hole 5; the pneumatic opening and closing assembly 3 is arranged on the installation table 6, and the valve plate 2 is arranged between the pneumatic opening and closing assembly 3 and the installation table 6. When the valve plate blocks the compressed air in a vertical state, the valve plate is subject to a large wind resistance and is prone to shift under the long-term high-pressure impact, resulting in a poor sealing effect or even deflecting the pneumatic opening and closing assembly and causing abnormal opening and closing. After adopting the above structure, the arc surface on the side of the diaphragm blocks the compressed air, which can reduce the impact force of the compressed air, and the flexible diaphragm is pressed against the inner wall of the air conveying pipe by the pneumatic opening and closing assembly for interference fit, and it is not easy to appear gaps.

[0022] In this embodiment, a funnel-shaped throttling part 7 is arranged in the air conveying pipe 1, and the valve plate 2 is arranged in the middle of the throttling part 7. The funnel-shaped throttling part can further increase the flow rate of the compressed air when passing through, improve the dredging strength of the blocked material, and at the same time, the small size of the throttling part can facilitate the valve plate to open and close quickly.

[0023] In this embodiment, the pneumatic opening and closing assembly 3 includes a mounting cylinder 3a provided on the outer wall of the air delivery pipe 1. At the upper end of the mounting cylinder 3a, there is a cylinder block 3b, and the air inlet of the cylinder block 3b is connected to the bypass pipe 4; a piston rod 3c connected to the valve plate 2 is provided inside the cylinder block 3b; a diaphragm 3d is provided in the middle inside the cylinder block 3b, the inner end of the piston rod 3c is connected to the diaphragm 3d, and a return spring 3e is connected between the diaphragm 3d and the inner bottom surface of the cylinder block 3b. The diaphragm is pushed upward by gas to drive the piston rod to open the valve plate. When the material conveying pipeline is unblocked and the conveying air flow no longer enters the cylinder block, under the action of the return spring, the diaphragm is pressed down to discharge the gas in the cylinder body, automatically closing the valve plate to block the compressed air.

[0024] Preferably, a guiding sleeve 8 is provided at the bottom of the cylinder block 3b, the piston rod 3c is arranged inside the guiding sleeve 8, and a sealing packing 9 is provided inside the guiding sleeve 8.

[0025] Further preferably, a bypass thin pipe 10 is conductively connected between one side of the air delivery pipe 1 close to the external compressed air source and the cylinder block 3b, and a throttle valve 11 is provided on the bypass thin pipe 10. By providing a bypass thin pipe on the cylinder block on the side opposite to the bypass pipe to allow a small amount of compressed air to enter the cylinder block for back blowing, it can effectively reduce the powder entering the cylinder block, avoid blockage of the cylinder block, and reduce the waste of powder.

[0026] Preferably, the rear end of the cylinder block 3b is threadedly connected with an adjusting rod 12. At one end of the adjusting rod 12 located inside the cylinder block 3b, there is an adjusting push plate 13 cooperating with the return spring 3e, and an adjusting handle 14 is provided at the other end of the adjusting rod 12. By controlling the position of the adjusting push plate through the adjusting rod, the stroke of the return spring can be adjusted to control the opening degree of the valve plate and adjust the blowing air volume.

[0027] During operation, when the material conveying pipeline at the front end of the air delivery pipe is blocked, the conveying air flow in the conveying pipeline enters the air delivery pipe, then enters the cylinder block through the bypass pipe to push the diaphragm, and the piston rod rises with the deformation of the diaphragm to open the valve plate, and the compressed air enters the material conveying pipeline through the air delivery pipe for purging. When the material conveying pipeline is unblocked, the return spring presses down the diaphragm to discharge the gas in the cylinder body, and at the same time the piston rod descends to close the valve plate to block the compressed air.

[0028] The above - mentioned embodiments are the preferred embodiments of the present invention, which are only used to conveniently illustrate the present invention and do not impose any form of limitation on the present invention. Any person with ordinary knowledge in the technical field, without departing from the technical features of the present invention, makes local changes or modified equivalent embodiments using the technical content disclosed by the present invention, and without departing from the technical feature content of the present invention, still belongs to the scope of the technical features of the present invention.

Claims

1. An automatic unblocking valve for a pneumatic material conveying pipe, comprising a plurality of air delivery pipes (1) connected to the side wall of the material conveying pipe, characterized in that: The other end of the air delivery pipe (1) is connected to an external compressed air source; a valve plate (2) is provided in the air delivery pipe (1), and a pneumatic opening and closing component (3) that cooperates with the valve plate (2) is provided on the outer wall of the air delivery pipe (1); and a bypass pipe (4) that is in communication with the pneumatic opening and closing component (3) is provided at one end of the air delivery pipe (1) close to the material conveying pipeline.

2. The automatic unblocking valve for pneumatic material conveying pipe according to claim 1, characterized in that: The valve plate (2) is a diaphragm made of a flexible material; a through hole (5) is provided on the side wall of the gas supply pipe (1), and a mounting platform (6) is provided on the outer wall of the gas supply pipe (1) outside the through hole (5); the pneumatic opening and closing component (3) is arranged on the mounting platform (6), and the valve plate (2) is arranged between the pneumatic opening and closing component (3) and the mounting platform (6).

3. The automatic unblocking valve for pneumatic material conveying pipe according to claim 1, characterized in that: A funnel-shaped throttling portion (7) is provided in the gas delivery pipe (1), and the valve plate (2) is arranged in the middle of the throttling portion (7).

4. The automatic unblocking valve for pneumatic material conveying pipe according to claim 1, characterized in that: The pneumatic opening and closing assembly (3) comprises a mounting tube (3a) arranged on the outer wall of the air delivery pipe (1); a cylinder body (3b) is arranged at the upper end of the mounting tube (3a); an air inlet of the cylinder body (3b) is connected to a bypass pipe (4); a piston rod (3c) connected to a valve plate (2) is arranged in the cylinder body (3b); a diaphragm (3d) is arranged in the middle of the cylinder body (3b); an inner end of the piston rod (3c) is connected to the diaphragm (3d); and a return spring (3e) is connected between the diaphragm (3d) and the inner bottom surface of the cylinder body (3b).

5. The automatic unblocking valve for pneumatic material conveying pipe according to claim 4, characterized in that: A guide sleeve (8) is provided at the bottom of the cylinder body (3b), the piston rod (3c) is arranged in the guide sleeve (8), and a sealing filler (9) is provided in the guide sleeve (8).

6. The automatic unblocking valve for pneumatic material conveying pipe according to claim 4, characterized in that: A bypass capillary (10) is connected between the side of the air delivery pipe (1) close to the external compressed air source and the cylinder body (3b), and a throttle valve (11) is provided on the bypass capillary (10).

7. The automatic unblocking valve for pneumatic material conveying pipe according to claim 4, characterized in that: The rear end of the cylinder body (3b) is threadedly connected with an adjusting rod (12); an adjusting push plate (13) cooperating with a return spring (3e) is provided on one end of the adjusting rod (12) located inside the cylinder body (3b); and an adjusting handle (14) is provided on the other end of the adjusting rod (12).

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