High-air-tightness gate valve structure

Abstract

The invention provides a high-airtightness gate valve structure which comprises a gate valve body, two parallel linear guide rails and a door opening and closing driving device are mounted on the gate valve body, a sealing door mounting plate is slidably connected to the two linear guide rails, a sealing door is fixedly mounted on the sealing door mounting plate, and the sealing door mounting plate is slidably connected to the linear guide rails. A large-end sealing face is machined on the inner side of the gate valve body, and a door sealing face is arranged between the gate valve body and the sealing door. According to the gate valve, the whole gate valve is compact in structure and also has the characteristics of being light and thin, the gate valve has extremely high air tightness through the multiple sealing faces, a sealing door of the gate valve can be easily locked and opened, and meanwhile the gate valve is suitable for occasions with high requirements for the automation degree and the air tightness when multiple devices are in butt joint.

Description

Technical Field

[0001] The invention belongs to the technical field of gate valve structure design, and in particular relates to a high-air-tightness gate valve structure. Background Art

[0002] The gate valve is a commonly used valve, and its main function is to isolate two adjacent spaces. The most important thing to pay attention to in the actual operation of the gate valve is the sealing problem, followed by lightness and compactness. At present, the existing gate valve body is mainly obtained by welding or casting. The flatness and parallelism errors between the sealing surfaces are large. The dimensional error of the valve body is mainly compensated by the large deformation of the O-ring. Long-term use will accelerate the fatigue damage of the O-ring and affect the sealing. At the same time, the existing gate valve body is limited by the processing technology, the valve body size is thick, and it occupies a large use space. In addition, the traditional gate valve sealing door is heavy, and a large driving force is required when opening and closing the door, which increases energy loss. In response to the above problems, our company has developed a high-airtightness gate valve structure to solve the above technical problems. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a high-air-tightness gate valve structure. The entire gate valve is not only compact in structure but also light and thin. The gate valve has extremely high air-tightness through the provision of multiple sealing surfaces, and the sealing door of the gate valve can be easily locked and opened. The gate valve is suitable for occasions with high requirements on automation and air-tightness when multiple devices are connected.

[0004] A high airtightness gate valve structure comprises a gate valve body, on which are mounted two parallel linear guide rails and a switch door drive device, a sealing door mounting plate being slidably connected to the two linear guide rails, on which a sealing door is fixedly mounted, a large end sealing surface being machined on the inner side of the gate valve body, and a door sealing surface being arranged between the gate valve body and the sealing door.

[0005] As a preferred solution of this embodiment, a mounting surface for mounting a linear guide rail and a door opening and closing drive device is provided on the valve body of the gate valve, and a small end sealing surface is provided on the outer surface of the sealing door.

[0006] As a preferred solution of this embodiment, a clamping cylinder is connected to the sealing door, and the clamping cylinder drives the sealing door and the valve body of the gate valve to be tightly fitted or separated.

[0007] As a preferred solution of this embodiment, a linear bearing and a guide column are installed on the sealed door, and the linear bearing and the guide column cooperate with the linear guide rail.

[0008] As a preferred solution of this embodiment, a sensor is provided at the bottom of the inner side of the valve body of the gate valve, and the sensor is used to detect the position of the sealing door on the linear guide rail.

[0009] As a preferred solution of this embodiment, a hydraulic buffer is installed on the valve body of the gate valve near the door closing drive device, and the hydraulic buffer provides damping for the sealing door.

[0010] As a preferred solution of this embodiment, an electrical storage groove and a drag chain are respectively installed at the bottom of the gate valve body and one side of the gate valve body, and the electrical storage groove and the drag chain are used to store matching cables and air pipes.

[0011] As a preferred solution of this embodiment, a large end sealing O-ring is arranged on the inner side of the outer frame of the gate valve body, and a door sealing O-ring (11) is arranged on the inner side of the sealing door.

[0012] As a preferred solution of this embodiment, a lifting ring is installed on the top of the gate valve body.

[0013] As a preferred solution of this embodiment, the processing flatness of the large end sealing surface, the door sealing surface, the mounting surface and the small end sealing surface reaches 0.05.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] The high airtightness gate valve structure of the present invention has a compact gate valve structure, is easy to operate, and has a thin gate valve body, which saves installation space. The gate valve has extremely high airtightness through the provision of multiple sealing surfaces, which reduces the leakage rate of the gate valve. The leakage rate measured by helium mass spectrometry is 8x10 -9 Pa*m 3 / s or less. The linear guide rail and the door opening and closing drive device can realize the easy locking and opening of the gate valve sealing door, and at the same time, it is conducive to the interlocking of the docking equipment in the program, which increases the safety of equipment use. It is suitable for occasions with high requirements for automation and air tightness when docking multiple equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the high airtightness gate valve structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall structure of the high airtightness gate valve structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the overall structure of the exterior of the high airtightness gate valve structure of the present invention;

[0020] Figure 4 It is a cross-sectional schematic diagram of the high airtightness gate valve structure of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the valve body of the plug valve in the present invention.

[0022] As shown in the figure: 1. Lifting ring; 2. Gate valve body; 3. Clamping cylinder; 4. Sealing door; 5. Linear bearing; 6. Sealing door mounting plate; 7. Door opening and closing drive device; 8. Linear guide rail; 9. Buffer; 10. Sensor; 11. Door sealing O-ring; 12. Large end sealing O-ring; 13. Electrical storage groove; 14. Drag chain; 15. Large end sealing surface; 16. Door sealing surface; 17. Mounting surface; 18. Small end sealing surface; 19. Guide column. DETAILED DESCRIPTION

[0023] The following content is combined with the embodiments to clearly and completely describe the technical solution of the present invention so that those skilled in the art can fully understand the present invention. Obviously, the described embodiments are only some preferred embodiments of the present invention, rather than all embodiments. Any equivalent transformation or substitution made by ordinary technicians in this field to the following implementation methods without creative work belongs to the protection scope of the present invention.

[0024] See also Figures 1 to 5 As shown, the embodiment of the present invention provides a gate valve body 2, on which two parallel linear guide rails 8 and a switch door drive device 7 are installed (in this embodiment, the switch door drive device 7 can be an electric door drive or a pneumatic actuator), the two linear guide rails 8 are slidably connected with a sealing door mounting plate 6, and a sealing door 4 is fixedly installed on the sealing door mounting plate 6, a large end sealing surface 15 is processed on the inner side of the gate valve body 2, and a door sealing surface 16 is provided between the gate valve body 2 and the sealing door 4. A mounting surface 17 for mounting the linear guide rails 8 and the switch door drive device 7 is provided on the gate valve body 2, and a small end sealing surface 18 is provided on the outer surface of the sealing door 4.

[0025] In this embodiment, the door opening and closing driving device 7 is connected to drive the sealing door mounting plate 6 and the sealing door 4 to move on the linear guide rail 8. The large end sealing surface 15, the door sealing surface 16, the mounting surface 17 and the small end sealing surface 18 are arranged to make the gate valve have extremely high air tightness. The leakage rate measured by the helium mass spectrometer is 8x10 -9 Pa*m 3 / s or less.

[0026] See also Figure 1 and Figure 2 As shown, a clamping cylinder 3 is connected to the sealing door 4, and the clamping cylinder 3 drives the sealing door 4 to fit tightly or separate from the valve body 2 of the gate valve. A linear bearing 5 and a guide column 19 are installed on the sealing door 4. The linear bearing 5 and the guide column 19 cooperate with the linear guide rail 8. The clamping cylinder 3 not only has a large clamping force but also has a guiding function. Through the linear bearing 5 and the guide column 19, when the door is closed, the sealing door 4 is subjected to a double guiding effect, and the operation is more stable. The sealing door mounting plate 6 and the sealing door 4 are designed to reduce weight, and after processing and forming, they are light and have structural strength.

[0027] See also Figure 1 and Figure 2 As shown, a sensor 10 is arranged at the bottom of the inner side of the valve body 2 of the gate valve. The sensor 10 is used to detect the position of the sealing door 4 on the linear guide rail 8. At the same time, the setting of the sensor 10 facilitates the interlocking of the gate valve and the docking equipment in the program, which increases the safety of the equipment. A hydraulic buffer 9 is installed on the gate valve body 2 near the door closing drive device 7. The hydraulic buffer 9 provides damping for the sealing door 4. When the gate valve is about to open and close the door, it provides damping for the sealing door 4, slowing down the impact force of the sealing door 4 on the gate valve when opening and closing the door, and avoiding damage to the door opening and closing drive device 7. An electrical storage groove 13 and a drag chain 14 are respectively installed at the bottom of the gate valve body 2 and one side of the gate valve body 2. The electrical storage groove 13 and the drag chain 14 are used to store the matching cables and air pipes, making the inside of the gate valve more concise and refreshing. A lifting ring 1 is installed on the top of the gate valve body 2 to facilitate the lifting of the equipment when docking.

[0028] See also Figures 3 to 5 As shown, the valve body 2 of the gate valve is integrally processed with thick steel plate, and the large end sealing surface 15, the door sealing surface 16, the linear guide and the switch door drive device installation surface 17 and the small end sealing surface 18 are processed. Among them, the processing flatness of the large end sealing surface 15, the door sealing surface 16, the installation surface 17 and the small end sealing surface 18 reaches 0.05. At the same time, the flatness and parallelism processing errors between the installation surface 17 and the large end sealing surface 15 are 0.05. The flatness and parallelism processing errors between the installation surface 17 and the door sealing surface 16 are 0.05. The flatness and parallelism processing errors between the installation surface 17 and the small end sealing surface 18 are 0.05. A large end sealing O-ring 12 is arranged on the inner side of the outer frame of the gate valve body 2, and a door sealing O-ring 11 is arranged on the inner side of the sealing door 4, which can meet the ultra-high sealing performance of the gate valve after docking with the equipment.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A high airtightness gate valve structure, comprising a gate valve body (2), characterized in that: Two parallel linear guide rails (8) and a door opening and closing drive device (7) are installed on the gate valve body (2); a sealing door mounting plate (6) is slidably connected to the two linear guide rails (8); a sealing door (4) is fixedly mounted on the sealing door mounting plate (6); a large end sealing surface (15) is machined on the inner side of the gate valve body (2); and a door sealing surface (16) is provided between the gate valve body (2) and the sealing door (4).

2. The high airtightness gate valve structure according to claim 1, characterized in that: A mounting surface (17) for mounting a linear guide rail (8) and a door opening and closing drive device (7) is provided on the valve body (2) of the gate valve, and a small end sealing surface (18) is provided on the outer surface of the sealing door (4).

3. The high airtightness gate valve structure according to claim 1, characterized in that: The sealing door (4) is connected to a pressing cylinder (3), and the pressing cylinder (3) drives the sealing door (4) and the gate valve body (2) to be tightly fitted or separated.

4. The high airtightness gate valve structure according to claim 1, characterized in that: A linear bearing (5) and a guide column (19) are installed on the sealing door (4), and the linear bearing (5) and the guide column (19) are matched with the linear guide rail (8).

5. The high airtightness gate valve structure according to claim 1, characterized in that: A sensor (10) is arranged at the bottom of the inner side of the gate valve body (2), and the sensor (10) is used to detect the position of the sealing door (4) on the linear guide rail (8).

6. The high airtightness gate valve structure according to claim 1, characterized in that: A hydraulic buffer (9) is installed on the gate valve body (2) at a position close to the door closing drive device (7), and the hydraulic buffer (9) provides damping for the sealing door (4).

7. The high airtightness gate valve structure according to claim 1, characterized in that: An electrical storage groove (13) and a drag chain (14) are respectively installed at the bottom of the gate valve body (2) and one side of the gate valve body (2), and the electrical storage groove (13) and the drag chain (14) are used to store matching cables and air pipes.

8. The high airtightness gate valve structure according to claim 1, characterized in that: A large end sealing O-ring (12) is arranged on the inner side of the outer frame of the gate valve body (2), and a door sealing O-ring (11) is arranged on the inner side of the sealing door (4).

9. The high airtightness gate valve structure according to claim 1, characterized in that: A lifting ring (1) is installed on the top of the gate valve body (2).

10. The high airtightness gate valve structure according to claim 2, characterized in that: The processing flatness of the large end sealing surface (15), the door sealing surface (16), the mounting surface (17) and the small end sealing surface (18) reaches 0.05.

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