Air locking piston door

Abstract

A gas locking piston door comprises a guide pipe, the guide pipe is arranged outside a pipe shaft of a gas locking screw feeder in a sleeving mode, a sealing plate is fixed to the outer wall of one end of the guide pipe, and the sealing plate and the end face of a shell of the gas locking screw feeder are sealed; an upper shell and a lower shell are correspondingly welded to the side, facing the guide pipe, of the sealing plate up and down, and the upper shell and the lower shell are attached to the inner wall of the shell; a working panel is arranged on the side, away from the sealing plate, of the upper shell. The working panel, the upper shell and the lower shell form a closed annular end face at one end of the guide pipe. The air locking piston door provided by the utility model can ensure that the air locking screw feeder can realize good sealing and air locking effects under the conditions of no material, few material and full material.

Description

Technical Field

[0001] The utility model relates to a piston door, in particular to an air-locking piston door. Background Art

[0002] In the conveying system of pulverized coal, grain and oil, etc., the system often has positive pressure, which sometimes causes discontinuity or too little flow. In this case, there will be a large residual space in the shell, which will cause backfire or back air, which will bring certain safety hazards to production safety and the personal safety of workers. The use of air-locking screw feeder can effectively solve the above problems.

[0003] The air-locking screw feeder achieves the air-locking effect by blocking the material from being discharged when the material flow is too small, so that a section of the shell without blades is filled with material and then the outlet and inlet are isolated. The material-blocking door that prevents the material from being discharged is a major component of the air-locking screw feeder. In actual use, due to the complex and diverse working conditions, the material-blocking door is required to meet the requirements of achieving a good material-blocking and air-locking effect under various conditions.

[0004] The patent "An Adjustable Air Locking Screw Feeder" with application number "202022312185.3" is a patent previously applied for by our company. When the material is small, the material blocking door in the device will flow out through the gap at the bottom of the door, and when the material is small, the air locking effect is very poor. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide an air-locking piston door which can realize good sealing and air-locking.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] An air-locking piston door comprises a guide tube, which is sleeved outside the tube axis of an air-locking screw feeder. A sealing plate is fixed to the outer wall of one end of the guide tube, and the sealing plate is sealed with the end face of the shell of the air-locking screw feeder; an upper shell and a lower shell are welded correspondingly on the upper and lower sides of the sealing plate facing the guide tube, and the upper and lower shells are fitted with the inner wall of the shell; a working panel is provided on the side of the upper shell away from the sealing plate, and the working panel, the upper and lower shells form a closed annular end face at one end of the guide tube.

[0008] A U-shaped groove is formed between the edge of the sealing plate facing the working panel and the upper and lower shells, and a sealing strip is provided in the groove; a sealing box is provided near the guide tube on the side of the sealing plate away from the working panel, and a sealing strip is provided in the sealing box.

[0009] An arc-shaped baffle is fixed on the lower part of one side of the sealing plate away from the working panel.

[0010] Slide grooves are provided on both sides of the air lock piston door.

[0011] The working panel has an elliptical cross section inclined at a certain angle.

[0012] The utility model provides an air-locking piston door, which has the following technical effects:

[0013] 1) By setting the air lock piston door, the air lock piston door and the shell and pipe shaft in the screw feeder are closely matched, and a good sealing and air locking effect can be achieved under the conditions of no material, little material and full material.

[0014] 2) If only sealing plates, guide tubes and sealing boxes are provided, materials may flow upward and gather on the left side of the sealing plate when unloading, resulting in poor air locking effect. By providing upper and lower shells and working panels, and making the working panel on the right side inclined, the advantages are: first, guiding the unloading of materials, and second, ensuring the sealing and air locking effect when the door is opened to any position. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 It is the main sectional view of the present utility model.

[0017] Figure 2 It is a left view of the present utility model.

[0018] Figure 3 It is a left side view of the upper shell in the utility model.

[0019] Figure 4 This is a schematic diagram of the first working state of the utility model.

[0020] Figure 5 This is a schematic diagram of the first working state of the utility model.

[0021] FIG6 (a) is a front view of the lower housing of the present invention.

[0022] FIG6 (b) is a left side view of the lower housing of the utility model.

[0023] FIG6 (c) is a top view of the lower housing of the present invention.

[0024] Figure 7 It is a structural schematic diagram of the working panel in the utility model.

[0025] In the figure: working panel 1, upper shell 2, guide tube 3, lower shell 4, sealing plate 5, sealing box 6, connecting ear plate 7, arc baffle 8, sealing strip 9, connecting piece 10, shell 11, pipe shaft 12, chute 13, discharge port 14. DETAILED DESCRIPTION

[0026] likeFigures 1-3 As shown, an air-locking piston door has an overall shape of a circular cross-section that matches the tubular shell 11 on the right side, including a guide tube 3. The guide tube 3 matches the pipe shaft 12 of the air-locking screw feeder and is sleeved outside the pipe shaft 12. There is a small gap between the guide tube 3 and the pipe shaft 12. When the pipe shaft 12 rotates, the guide tube 3 does not rotate with the pipe shaft 12. A circular sealing plate 5 is fixed on the outer wall of the left end of the guide tube 3. The diameter of the sealing plate 5 is slightly larger than the tubular shell 11. The sealing plate 5 is welded to the upper shell 2 and the lower shell 4 as a whole. The upper shell 2 is located above the guide tube 3, and the upper shell 2 is a semicircular tube. The lower shell 4 is located below the guide tube 3. A working panel 1 is provided on the side of the upper shell 2 away from the sealing plate 5. The working panel 1 is an elliptical cross-section inclined at a certain angle. The working panel 1 is welded to the upper shell 2 and the lower shell 4 as a whole and forms a closed annular end face on the right side of the guide tube 3, which can prevent materials from passing through.

[0027] A sealing box 6 is provided on the left side of the sealing plate 5 of the piston door. The sealing box 6 and the sealing plate 5 are movably connected by a connector 10. A sealing strip 9 is provided in the sealing box 6 to seal the guide tube 3 and the tube shaft 12. In addition, a U-shaped groove is formed between the right edge of the sealing plate 5 and the upper shell 2 and the lower shell 4. A sealing strip 9 is provided in the groove to ensure that the device is sealed with the shell 11. An arc-shaped baffle 8 is welded to the lower end edge of the left side of the sealing plate 5. The arc-shaped baffle 8 can isolate the material and the temper below during the closing and opening process of the piston door, preventing the material and the temper below from entering the shell on the left side of the sealing plate 5.

[0028] The left and right sides of the sealing plate 5 are fixedly connected with connecting ear plates 7; the connecting ear plates 7 are used to connect with the driving device and drive the device to move left and right.

[0029] The piston door is provided with chute grooves 13 on either side. These grooves provide positioning, guidance, and support. They slidably engage with guide rails on the housing at the outlet 14 on the left side of the housing 11. These chute grooves 13 not only provide positioning and guidance, but also support the piston door. Without these chute grooves and the guide rails on the housing, the weight of the piston door, caused by the guide tube 3 and lower housing 4, presses against the spiral feeder shaft and the housing, increasing resistance during opening and closing of the piston door. Furthermore, the rotation of the shaft can cause the coupling lug 7 to twist.

[0030] Working principle and process: When the flow is too small, the device is in Figure 4 State, at this time, the sealing plate 5 is located at the end of the circular tube-shaped shell 11 and is sealed by the sealing strip 9. The upper shell 2, the lower shell 4, the working panel 1 and the guide tube 3 form a closed end face to isolate the outlet and the inlet, ensuring the anti-backfire and anti-leakage effect of the screw feeder. When the shell 11 is filled with material on the right side of the working panel 1 and the thrust reaches a certain level; under the action of the driving device, the device moves left and is inFigure 5 State, at this time, the material is removed from the discharge port 14.

Claims

1. An air-lock piston door, characterized in that: The invention comprises a guide tube (3), the guide tube (3) is sleeved outside the pipe shaft (12) of the air-locking screw feeder, a sealing plate (5) is fixed to the outer wall of one end of the guide tube (3), and the sealing plate (5) is sealed with the end face of the shell (11) of the air-locking screw feeder; an upper shell (2) and a lower shell (4) are welded to the upper and lower sides of the sealing plate (5) facing the guide tube (3), and the upper shell (2) and the lower shell (4) are in contact with the inner wall of the shell (11); a working panel (1) is provided on the side of the upper shell (2) away from the sealing plate (5), and the working panel (1) forms a closed annular end face with the upper shell (2) and the lower shell (4) at one end of the guide tube (3).

2. The air-lock piston door according to claim 1, characterized in that: A U-shaped groove is formed between the edge of the sealing plate (5) facing the working panel (1) and the upper shell (2) and the lower shell (4), and a sealing strip (9) is provided in the groove; a sealing box (6) is provided near the guide tube (3) on the side of the sealing plate (5) away from the working panel (1), and a sealing strip (9) is provided in the sealing box (6).

3. The air-lock piston door according to claim 1, characterized in that: An arc-shaped baffle (8) is fixed to the lower portion of the side of the sealing plate (5) away from the working panel (1).

4. The air-lock piston door according to claim 1, characterized in that: Slide grooves (13) are provided on both sides of the air lock piston door.

5. The air-locking piston door according to claim 1, characterized in that: The working panel (1) has an elliptical cross-section inclined at a certain angle.

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