Vacuum air locking valve

Abstract

The invention discloses a vacuum blocking valve, which relates to the field of valves, and comprises an upper valve body and a lower valve body, the upper valve body and the lower valve body are vertically, elastically and slidably connected through an elastic guide assembly, so that the upper valve body and the lower valve body have a trend of elastically separating from each other, and the upper valve body and the lower valve body are communicated through an air passage assembly; the upper valve body is in a closing-up shape from top to bottom, a sealing body is placed in the upper valve body, the lower valve body is connected with a vacuum source, negative pressure is formed in the air channel assembly, the sealing body is adsorbed to block a bottom opening of the upper valve body, a limiting rod fixed to the lower valve body is arranged in the air channel assembly, and the upper valve body is pressed to descend so that the limiting rod can abut against the sealing body to open the bottom opening of the upper valve body. The upper valve body and the lower valve body are arranged in an elastic sliding mode, when vacuum equipment presses down the upper valve body, the limiting rod abuts against the sealing body to automatically open an air path, and when the vacuum equipment is withdrawn, the sealing body can automatically block the air path, so that the vacuum equipment can get rid of the burdens of a traditional vacuum dragging pipe, and operation of the vacuum equipment is more automatic.

Description

Technical Field

[0001] The present invention relates to the field of valves, and in particular to a vacuum air lock valve. Background Art

[0002] The leaf filter of small and medium-sized titanium dioxide devices is equipped with a vacuum source to work together. There is an air path connection component between the leaf filter and the vacuum source. Since the leaf filter has displacement requirements during operation, in order to ensure the dynamic connection of the air path between the leaf filter and the vacuum source, a "drag hose" is traditionally used as the air path connection component; The "drag hose" gas connection method makes it impossible for the leaf filter body to get rid of the vacuum source during movement. The opening and closing of the vacuum source is manually controlled by the ball valve on the pipeline. This operation is very inconvenient in large-scale production equipment with multiple slot displacements and multiple leaf filters where movement is limited. Summary of the invention

[0003] In order to make up for the deficiencies of the existing technical problems, the purpose of the present invention is to provide a vacuum air lock valve for solving the problem that the traditional leaf filter and the vacuum source are entangled by the "drag hose", which makes the movement extremely inconvenient in the case of multi-slot displacement and multi-leaf filter.

[0004] In order to solve the problems of the prior art, the technical solution of the present invention is as follows: A vacuum air lock valve comprises an upper valve body and a lower valve body, the upper valve body and the lower valve body are vertically elastically slidably connected by an elastic guide assembly, so that the upper valve body and the lower valve body have a tendency to elastically move away from each other, the upper valve body and the lower valve body are connected by an airway assembly, the upper valve body is closed from top to bottom, and a sealing body is placed inside, the lower valve body is connected to a vacuum source, so that negative pressure is formed in the airway assembly and the sealing body is adsorbed to seal the bottom opening of the upper valve body, and a limiting rod fixed to the lower valve body is arranged in the airway assembly, and the upper valve body is pressed down so that the limiting rod can contact the sealing body to open the bottom opening of the upper valve body.

[0005] Preferably, the elastic guide assembly includes a download seat and an upper loading seat, the download seat and the upper loading seat are respectively fixedly connected to the lower valve body and the upper valve body, the upper loading seat and the download seat are slidingly guided by multiple guide rods, and a spring is connected between the download seat and the upper loading seat.

[0006] Preferably, the airway component comprises a central conduit, the top end of the central conduit is communicated with the bottom opening of the upper valve body, and the bottom end of the central conduit is slidably plugged with the lower valve body.

[0007] Preferably, a flexible expansion joint is provided on the outer side of the central conduit, and two ends of the flexible expansion joint are respectively sealed and connected to the lower download seat and the upper load seat.

[0008] Preferably, the sealing body is spherical in shape, the outside of the sealing body has a soft rubber layer, and the upper edge of the bottom opening of the upper valve body is a spherical shape that fits the sealing body.

[0009] Preferably, the top end of the limiting rod has an expansion structure adapted to the spherical surface of the sealing body.

[0010] Preferably, when the upper valve body and the lower valve body are elastically expanded, there is a gap between the limiting rod and the sealing body.

[0011] Preferably, a positioning frame is provided in the lower valve body, and the limiting rod threadably passes through the positioning frame.

[0012] Preferably, a valve cover is connected to the outer side of the upper valve body, and the valve cover extends downward to cover the outer side of the lower seat.

[0013] Compared with the prior art, the advantages of the present invention are as follows: 1. The present invention adopts an elastic sliding arrangement between the upper valve body and the lower valve body. When the vacuum equipment presses down the upper valve body, the limit rod contacts the sealing body to automatically open the gas path. When the vacuum equipment is evacuated, the sealing body can automatically block the gas path, so that the vacuum equipment can get rid of the burden of the traditional "vacuum drag tube" and make the operation of the vacuum equipment more automated.

[0014] 2. The present invention controls the contact distance between the limit rod and the sealing body so that the vacuum equipment can maintain an appropriate sealing pressure ratio with the upper valve body before pressing down the upper valve body to open the air path, thereby maintaining the sealing effect of the contact between the vacuum equipment and the upper valve body. At the same time, when the vacuum equipment is evacuated, it is ensured that the sealing body re-blocks the air path before separating the air path. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0016] Figure numerals: 1. valve cover; 2. upper valve body; 3. sealing body; 4. lower valve body; 5. limit rod; 6. central conduit; 7. guide rod; 8. flexible expansion joint; 9. download seat; 10. load seat; 11. positioning frame. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] like Figure 1 As shown, the vacuum air lock valve is composed of an upper valve body 2, a lower valve body 4, a sealing body 3, a limit rod 5, an elastic guide component, and an airway component; The upper valve body 2 is located at the top of the device. The upper valve body 2 has a truncated cone-shaped chamber that is larger at the top and smaller at the bottom. The top edge of the upper valve body 2 extends to form an annular seat, and a sealing ring is arranged on the surface of the seat. The lower valve body 4 is distributed at the bottom end of the device, the bottom port of the lower valve body 4 is a flange surface connected to the vacuum source, and the upper part of the lower valve body 4 is a tubular structure with uniform size; The elastic guide assembly is connected by a download seat 9 and an upper carrier seat 10. The download seat 9 is fixed on the outer side of the lower valve body 4, and the upper carrier seat 10 is fixed on the outer side of the upper valve body 2. A plurality of guide rods 7 are distributed around the download seat 9 and the upper carrier seat 10. The top of the guide rod 7 is fixed to the upper carrier seat 10 by bolts. The bottom of the guide rod 7 slides through the download seat 9, so that the upper valve body 2 and the lower valve body 4 can slide vertically. A spring is arranged between the download seat 9 and the upper carrier seat 10 on the outer side of the guide rod 7, so that the upper valve body 2 and the lower valve body 4 have a tendency to elastically move away from each other. The airway assembly includes a central conduit 6, the top end of the central conduit 6 is fixedly connected to the bottom opening of the upper valve body 2, and the bottom end of the central conduit 6 is slidably inserted into the tubular structure of the lower valve body 4, so that the air path between the upper valve body 2 and the lower valve body 4 is connected; The spherical sealing body 3 is placed in the upper valve body 2, and the diameter of the sealing body 3 is larger than the bottom opening size of the upper valve body 2; The limiting rod 5 penetrates the lower valve body 4 and the central conduit 6. The bottom of the limiting rod 5 is fixed to the lower valve body 4. The central conduit 6 has a slide bracket inside for slidingly guiding the limiting rod 5. The top of the limiting rod 5 faces the sealing body 3. The following uses a leaf filter as a representative of vacuum equipment to demonstrate the specific application of the vacuum air lock valve. The applications are as follows: The vacuum air lock valve is arranged vertically, the upper valve body 2 is located at the top, and the lower valve body 4 is located at the bottom. The flange surface of the lower valve body 4 is connected to the vacuum source equipment, so that a vacuum negative pressure is formed inside the lower valve body 4 and the central conduit 6. The negative pressure causes the sealing body 3 to be adsorbed and block the bottom opening of the upper valve body 2. At this time, the vacuum air lock valve is in a closed state. When the leaf filter needs vacuum operation, the leaf filter moves so that its port is pressed on the top of the upper valve body 2. Under the action of gravity, the upper valve body 2, the sealing body 3, and the central conduit 6 overcome the elastic force and descend under the guidance of the guide rod 7, while the lower valve body 4 and the limiting rod 5 always maintain a fixed height. The descending sealing body 3 is limited by the top end of the limiting rod 5, so that the sealing body 3 is separated from the continuously descending upper valve body 2, and the bottom opening of the upper valve body 2 is opened. At this time, the air path of the vacuum source and the leaf filter is connected, and the leaf filter is subjected to vacuum operation; When the leaf filter is leaving, the elastic force causes the upper valve body 2 and the central conduit 6 to move upwards. When the bottom of the upper valve body 2 contacts the sealing body 3 again, it is blocked, and the vacuum air path is automatically closed. The leaf filter can be directly lifted up and left.

[0019] When the leaf filter is not docked, the upper valve body 2 and the lower valve body 4 are elastically expanded, and there is a gap between the limit rod 5 and the sealing body 3. When the leaf filter is lowered to dock with the top opening of the upper valve body 2, there is a distance between the limit rod 5 and the sealing body 3. The leaf filter needs to continuously press down the upper valve body 2 to move one end distance so that the limit rod 5 can push the sealing body 3 open. During this process, as the upper valve body 2 continues to descend, the elastic reaction force of the upper valve body 2 continues to increase, and the sealing pressure ratio between the leaf filter and the top opening of the upper valve body 2 continues to rise through the elastic reaction force of the upper valve body 2, ensuring that when the limit rod 5 pushes the sealing body 3 to open the air path, the sealing pressure ratio between the leaf filter and the top opening of the upper valve body 2 has reached the vacuum sealing requirement, realizing a high sealing connection, and when the leaf filter is separated from the upper valve body 2, before the sealing body 3 re-seals the upper valve body 2, a high sealing pressure ratio is maintained between the leaf filter and the upper valve body 2.

[0020] A positioning frame 11 is provided in the lower valve body 4, and the limiting rod 5 is threadedly penetrated through the positioning frame 11. By rotating the positioning frame 11, the distance between its top end and the sealing body 3 can be adjusted, which is used to adjust the sealing pressure ratio between the leaf filter and the top opening of the upper valve body 2 when the limiting rod 5 pushes the sealing body 3 to open the air path.

[0021] A flexible expansion joint 8 is arranged on the outer side of the central conduit 6, and both ends of the flexible expansion joint 8 are respectively sealed and connected to the download seat 9 and the upper loading seat 10. The flexible expansion joint 8 adopts a bellows, a rubber tube or other deformable and expandable tubular structure, which is used to form a secondary seal for the air path between the upper valve body 2 and the lower valve body 4, and has a certain elastic reset effect on the upper valve body 2 and the lower valve body 4.

[0022] The outside of the spherical sealing body 3 has a soft rubber layer, and the upper edge of the bottom opening of the upper valve body 2 is a spherical shape adapted to the sealing body 3, so that the sealing body 3 and the bottom opening of the upper valve body 2 have a more fitting joint surface, and the sealing effect is better.

[0023] The top of the limiting rod 5 is a Y-shaped or truncated cone chamber-shaped expansion structure, so that the top of the limiting rod 5 can accurately push the sealing body 3 upward to avoid the sealing body 3 from deviating and affecting its accurate resetting.

[0024] The valve cover 1 is connected to the outer side of the upper valve body 2, and the valve cover 1 extends downward to cover the outer side of the lower seat 9, thereby realizing overall shielding and protection of the vacuum air lock valve.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum air lock valve, comprising an upper valve body (2) and a lower valve body (4), wherein the upper valve body (2) and the lower valve body (4) are vertically elastically slidably connected via an elastic guide assembly, so that the upper valve body (2) and the lower valve body (4) have a tendency to elastically move away from each other, characterized in that: The upper valve body (2) and the lower valve body (4) are connected by an airway assembly. The upper valve body (2) is closed from top to bottom and a sealing body (3) is placed inside. The lower valve body (4) is connected to a vacuum source so that negative pressure is formed in the airway assembly and the sealing body (3) is adsorbed to seal the bottom opening of the upper valve body (2). A limiting rod (5) fixed to the lower valve body (4) is provided in the airway assembly. When the upper valve body (2) is pressed down, the limiting rod (5) can contact the sealing body (3) to open the bottom opening of the upper valve body (2).

2. The vacuum air lock valve according to claim 1, characterized in that: The elastic guide assembly comprises a download seat (9) and an upper loading seat (10); the download seat (9) and the upper loading seat (10) are respectively fixedly connected to the lower valve body (4) and the upper valve body (2); a plurality of guide rods (7) are used for sliding guidance between the upper loading seat (10) and the download seat (9); and a spring is connected between the download seat (9) and the upper loading seat (10).

3. The vacuum air lock valve according to claim 2, characterized in that: The airway component comprises a central conduit (6), the top end of the central conduit (6) being connected to the bottom opening of the upper valve body (2), and the bottom end of the central conduit (6) being slidably plugged into the lower valve body (4).

4. The vacuum air lock valve according to claim 3, characterized in that: A flexible expansion joint (8) is provided on the outer side of the central conduit (6), and two ends of the flexible expansion joint (8) are respectively sealed and connected to the lower download seat (9) and the upper load seat (10).

5. The vacuum air lock valve according to claim 1, characterized in that: The sealing body (3) is spherical in shape, the outside of the sealing body (3) has a soft rubber layer, and the upper edge of the bottom opening of the upper valve body (2) is spherical in shape to fit the sealing body (3).

6. The vacuum air lock valve according to claim 5, characterized in that: The top end of the limiting rod (5) has an expansion structure adapted to the spherical surface of the sealing body (3).

7. The vacuum air lock valve according to claim 1, characterized in that: When the upper valve body (2) and the lower valve body (4) are elastically expanded, a gap exists between the limiting rod (5) and the sealing body (3).

8. The vacuum air lock valve according to claim 7, characterized in that: The lower valve body (4) has a positioning frame (11) in it, and the limiting rod (5) is threadedly passed through the positioning frame (11).

9. The vacuum air lock valve according to claim 2, characterized in that: The outer side of the upper valve body (2) is connected to a valve cover (1), and the valve cover (1) extends downward to cover the outer side of the lower seat (9).

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