A vacuum powder check valve

Abstract

This utility model discloses a powder flow stop valve for vacuum applications, comprising: a first fixed column and a tapered tube limiting structure; a second fixed column is fixedly connected to the lower surface of the first fixed column; a slide gate valve is fixedly connected to the lower surface of the second fixed column; a third fixed column is fixedly connected to the lower surface of the slide gate valve; a fourth fixed column is fixedly connected to the lower surface of the third fixed column; and a bellows is fixedly connected to the lower surface of the fourth fixed column. An annular groove is provided inside the first fixed column. The tapered tube limiting structure includes a first telescopic rod, a limiting plate, and a rubber pad. This structure allows the tapered tube to be inserted more accurately and stably into the annular groove. Under the action of the spring and damper, the swaying of the tapered tube is reduced, making the structure more stable. Furthermore, the tapered tube limiting structure can limit the tapered tube, reducing the possibility of powder leakage.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, and in particular to a powder check valve for vacuum applications. Background Technology

[0002] A check valve is a device used to control the flow of liquids and gases. Its main function is to prevent the flow of powder under specific conditions or to allow the powder to flow in a certain direction and flow rate. There are various types of check valves, including ball valves, butterfly valves, and gate valves. Check valves can precisely adjust the flow rate of powder according to requirements, effectively prevent the powder from flowing backward, and protect the system safety.

[0003] A search revealed that the utility model application with application number CN202321650345.2 provides a technical solution comprising an upper sliding valve and a lower gate valve, connected by a fixing post. Both the top and bottom plates of the sliding and gate valve housings have openings, and the opening on the bottom plate of the sliding valve and the opening on the top plate of the gate valve are connected by a through-hole inside the fixing post. A bellows is provided at the lower end of the gate valve housing, and the bellows contains a tapered tube that is thinner at the top and thicker at the bottom. This solution uses a third cylinder to actuate the bellows, causing it to contract and simultaneously... The conical tube moves upward, and its upper opening engages with the annular groove on the lower end face of the second fixed column. The first cylinder contracts, and the two sliding plates slide left and right away from each other inside the first housing, thus controlling the opening of the sliding plate valve. The powder can then enter the second vacuum chamber from the first vacuum chamber through the conical tube. However, the engagement between the conical tube and the annular groove needs to be very precise; even slight deviations can lead to poor sealing and powder leakage. Furthermore, when the powder flows from the first vacuum chamber into the second vacuum chamber, its flow rate is high in the middle of the conical tube, causing the tube to sway within the groove, which can further affect powder leakage. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a vacuum powder check valve. This structure, through the action of the guide plate, spring and damper, can make the conical tube more accurately and stably inserted into the annular groove. During use, the powder enters the second vacuum chamber through the first vacuum chamber. Under the action of the spring and damper, the shaking of the conical tube is reduced, making the structure more stable. Moreover, the conical tube limiting structure can limit the conical tube, enhance the sealing reliability of the check valve, and reduce the possibility of powder leakage.

[0005] To achieve the above objectives, this utility model also provides a vacuum powder check valve, comprising: a first fixed column and a tapered tube limiting structure; a second fixed column fixedly connected to the lower surface of the first fixed column; a slide gate valve fixedly connected to the lower surface of the second fixed column; a third fixed column fixedly connected to the lower surface of the slide gate valve; a fourth fixed column fixedly connected to the lower surface of the third fixed column; a bellows fixedly connected to the lower surface of the fourth fixed column; an annular groove provided inside the first fixed column; the tapered tube limiting structure includes a first telescopic rod, a limiting plate, and a rubber pad; the left end of the first telescopic rod is fixedly connected to the annular groove; the right end of the first telescopic rod is fixedly connected to the limiting plate; the right surface of the limiting plate is fixedly connected to the rubber pad; a spring fixedly connected to the right surface of the third fixed column; a damper fixedly connected to the right surface of the third fixed column; a guide plate fixedly connected to the right surface of the damper; and a check valve fixedly connected to the upper surface of the first fixed column.

[0006] According to the aforementioned vacuum powder check valve, a fifth fixing column is fixedly connected to the lower surface of the bellows, and a cylinder is fixedly connected to the lower surface of the fifth fixing column.

[0007] According to the aforementioned vacuum powder check valve, the cylinder is electrically connected to an external power source, and the output end of the cylinder is fixedly connected to a fourth fixed column. By starting the cylinder, the conical tube is moved, the bellows is compressed, and under the action of the spring, damper and guide plate, the conical tube enters the second annular groove, opening the check valve. The powder can then enter the second vacuum chamber through the first vacuum chamber. This structure has a better sealing effect.

[0008] According to the aforementioned vacuum powder check valve, a tapered tube is fixedly connected to the upper surface of the fifth fixed column, and the tapered tube passes through the interior of the bellows.

[0009] According to the aforementioned vacuum powder check valve, the right end of the spring is fixedly connected to the guide plate.

[0010] According to the aforementioned vacuum powder check valve, the valve has an internal groove, and a second telescopic rod is fixedly connected to the left inner wall of the groove.

[0011] According to the aforementioned vacuum powder check valve, the second telescopic rod is electrically connected to an external power source, and a sliding plate is fixedly connected to the right end of the second telescopic rod. By activating the second telescopic rod to move the sliding plate, the check valve can be opened or closed, allowing powder to enter the second vacuum chamber from the first vacuum chamber.

[0012] According to the aforementioned vacuum powder check valve, there are multiple springs and dampers. When the powder passes through the first vacuum chamber and enters the second vacuum chamber, the compression of the springs and dampers makes the structure more stable. When the powder flows through the conical tube, it plays a shock-absorbing and buffering role on the conical tube. The multiple springs and dampers provide good shock absorption.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a schematic diagram of the overall structure of a vacuum powder check valve according to the present invention;

[0016] Figure 2 This is a partial structural cross-sectional view of a powder check valve for vacuum applications according to this utility model.

[0017] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0018] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point B.

[0019] Legend:

[0020] 1. First fixed post; 2. Second fixed post; 3. Slide valve; 4. Third fixed post; 5. Fourth fixed post; 6. Bellows; 7. Fifth fixed post; 8. Cylinder; 9. Annular groove; 10. First telescopic rod; 11. Limiting plate; 12. Rubber pad; 13. Spring; 14. Damper; 15. Guide plate; 16. Conical tube limiting structure; 17. Stop valve; 18. Groove; 19. Second telescopic rod; 20. Draw plate; 21. Conical tube. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-4This utility model discloses a powder check valve for vacuum applications, comprising: a first fixed column 1 and a tapered tube limiting structure 16; a second fixed column 2 is fixedly connected to the lower surface of the first fixed column 1; a slide gate valve 3 is fixedly connected to the lower surface of the second fixed column 2; a third fixed column 4 is fixedly connected to the lower surface of the slide gate valve 3; a fourth fixed column 5 is fixedly connected to the lower surface of the third fixed column 4; a tapered tube 21 is fixedly connected to the upper surface of the fifth fixed column 7, the tapered tube 21 passing through the interior of a bellows 6; and a bellows is fixedly connected to the lower surface of the fourth fixed column 5. 6. A fifth fixing post 7 is fixedly connected to the lower surface of the bellows 6. A cylinder 8 is fixedly connected to the lower surface of the fifth fixing post 7. The cylinder 8 is electrically connected to an external power source. The output end of the cylinder 8 is fixedly connected to the fourth fixing post 5. When the cylinder 8 is activated, the bellows 6 is compressed, causing the tapered tube 21 to move upward. A spring 13 is fixedly connected to the right surface of the third fixing post 4. A damper 14 is fixedly connected to the right surface of the third fixing post 4. The right end of the spring 13 is fixedly connected to the guide plate 15. The right surface of the damper 14 is fixedly connected to the guide plate 15. The number of springs 13 and dampers 14 is multiple. The tapered tube 21 moves upward under the action of the guide plate 15, allowing it to more accurately enter the annular groove 9. The first fixed post 1 has an annular groove 9 inside. The tapered tube limiting structure 16 includes a first telescopic rod 10, a limiting plate 11, and a rubber pad 12. The left end of the first telescopic rod 10 is fixedly connected to the annular groove 9, and the right end of the first telescopic rod 10 is fixedly connected to the limiting plate 11. The right surface of the limiting plate 11 is fixedly connected to the rubber pad 12. When the upper surface of the tapered tube 21 is in contact with the top of the annular groove 9... When the inner wall contacts the cylinder, the cylinder 8 is stopped and the first telescopic rod 10 is activated to drive the limiting plate 11 and the rubber pad 12 to limit the conical tube 21, making the structure more stable. The upper surface of the first fixed column 1 is fixedly connected to the stop valve 17. The inside of the stop valve 17 is provided with a groove 18. The left inner wall of the groove 18 is fixedly connected to the second telescopic rod 19. The second telescopic rod 19 is electrically connected to an external power source. The right end of the second telescopic rod 19 is fixedly connected to the pull plate 20. By activating the second telescopic rod 19 to drive the pull plate 20 to move, the stop valve 17 can be opened and closed.

[0023] Working principle: When it is necessary to open the check valve 17, first ensure that the pressure on both sides of the check valve 17 is the same, open the inner plate of the slide valve 3, and start the cylinder 8 to drive the conical tube 21 to move upward. The bellows 6 is compressed, and the conical tube 21 can be inserted more smoothly into the annular groove 9 in the first fixed column 1 under the action of the spring 13, damper 14, and guide plate 15. When the upper surface of the conical tube 21 contacts the inner wall of the top of the annular groove 9, stop starting the cylinder 8, start the first telescopic rod 10 to drive the limiting plate 11 and the rubber pad 12 to limit the conical tube 21, and start the second telescopic rod 10. The two telescopic rods 19 drive the pull plate 20 to move to both ends, allowing the powder to enter the second vacuum chamber from the first vacuum chamber through the conical tube 21. This structure allows the conical tube 21 to be inserted into the annular groove 9 more accurately and stably. During use, the powder enters the second vacuum chamber from the first vacuum chamber. Under the action of the spring 13 and the damper 14, the shaking of the conical tube 21 is reduced, making the structure more stable. Furthermore, the conical tube limiting structure 16 limits the conical tube 21 when it moves into the annular groove 9, enhancing the sealing reliability of the stop valve 17 and reducing the possibility of powder leakage.

[0024] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A powder stop valve for vacuum, characterized by comprising: 1) a valve body having a valve hole and a valve seat, include: The first fixed column (1) and the tapered tube limiting structure (16) are connected to the lower surface of the first fixed column (1), the second fixed column (2) is fixedly connected to the lower surface of the second fixed column (2), the slide valve (3) is fixedly connected to the lower surface of the slide valve (3), the third fixed column (4) is fixedly connected to the lower surface of the third fixed column (4), the fourth fixed column (5) is fixedly connected to the lower surface of the fourth fixed column (5), and the bellows (6) is fixedly connected to the lower surface of the fourth fixed column (5). The first fixed column (1) is provided with an annular groove (9). The tapered tube limiting structure (16) includes a first telescopic rod (10), a limiting plate (11), and a rubber pad (12). The left end of the first telescopic rod (10) is fixedly connected to the annular groove (9), and the right end of the first telescopic rod (10) is fixedly connected to the limiting plate (11). The right surface of the limiting plate (11) is fixedly connected to the rubber pad (12). A spring (13) is fixedly connected to the right surface of the third fixing post (4). A damper (14) is fixedly connected to the right surface of the third fixing post (4). A guide plate (15) is fixedly connected to the right surface of the damper (14). A stop valve (17) is fixedly connected to the upper surface of the first fixing post (1).

2. The powder flow-stopping valve for vacuum use according to claim 1, wherein The lower surface of the corrugated pipe (6) is fixedly connected to a fifth fixing post (7), and the lower surface of the fifth fixing post (7) is fixedly connected to a cylinder (8).

3. The powder flow-stopping valve for vacuum use according to claim 2, wherein The cylinder (8) is electrically connected to an external power source, and the output end of the cylinder (8) is fixedly connected to the fourth fixed column (5).

4. The powder flow-stopping valve for vacuum use according to claim 3, wherein A tapered tube (21) is fixedly connected to the upper surface of the fifth fixed column (7), and the tapered tube (21) passes through the interior of the corrugated tube (6).

5. The powder flow stop valve for vacuum use according to claim 1, wherein The right end of the spring (13) is fixedly connected to the guide plate (15).

6. The powder flow-stopping valve for vacuum use according to claim 1, wherein The inside of the stop valve (17) is provided with a groove (18), and a second telescopic rod (19) is fixedly connected to the left inner wall of the groove (18).

7. A powder flow stop valve for use in a vacuum according to claim 6, wherein The second telescopic rod (19) is electrically connected to an external power source, and a drawer (20) is fixedly connected to the right end of the second telescopic rod (19).

8. The powder flow stop valve according to claim 1, wherein The number of springs (13) and dampers (14) is multiple.

Images