Gas stop valve used in vacuum environment

Abstract

The utility model discloses a gas stop valve used in a vacuum environment, and relates to the technical field of gas stop valves. A connecting shell is arranged at the bottom of the valve shell, an electromagnetic sealing assembly is arranged in an inner cavity of the valve shell, a valve seat is arranged at the bottom of the connecting shell, a sealing cylinder is fixedly connected to an inner cavity of the valve seat, an auxiliary sealing assembly is arranged at the bottom of the inner cavity of the valve seat, an air inlet pipe is arranged on one side of the valve seat, and an air outlet pipe is arranged on the other side of the valve seat. And an air outlet pipe is arranged on the other side of the valve seat. When the magnetic head is not electrified, the inner pressing rod bounces up under the action of the spring, so that normal introduction of gas is ensured; after electrification, the electromagnetic acting force drives the sealing piece at the lower end of the inner pressing rod to precisely block the vent hole in the surface of the sealing cylinder, reliable sealing is formed, the electromagnetic driving structure acts rapidly, position switching of the sealing piece can be completed at the moment of electrification, and the requirement for instantaneity of gas on-off in the vacuum environment is met.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas shut-off valves, and in particular relates to a gas shut-off valve for use in a vacuum environment. Background Technology

[0002] As a key component in fluid control systems, the main function of gas shut-off valves is to cut off or connect gas media in pipelines. In a vacuum environment, the performance of gas shut-off valves directly affects the maintenance of vacuum level, gas flow control, and the overall stability and safety of the system.

[0003] Currently, most gas shut-off valves adopt the traditional manual operation method. This operation method requires the operator to directly drive the valve core to open and close the valve through mechanical parts such as handwheels and handles. In a vacuum environment, manual operation has obvious drawbacks. On the one hand, manual operation requires the operator to have a certain strength and operating skills. Especially when the vacuum system pressure is low, the valve core is subjected to a large atmospheric pressure. Manually opening or closing the valve requires a lot of manpower and time, resulting in low efficiency.

[0004] To address these issues, we provide a gas shut-off valve for use in a vacuum environment. Utility Model Content

[0005] The purpose of this utility model is to provide a gas shut-off valve for use in a vacuum environment. By combining the electromagnetic sealing component and the auxiliary sealing component, it solves the problem that the gas shut-off valves in the prior art mostly adopt the traditional manual operation method, which requires a lot of manpower and time to manually open or close the valve, resulting in low efficiency.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a gas shut-off valve for use in a vacuum environment, comprising a valve housing, a connecting shell at the bottom of the valve housing, an electromagnetic sealing assembly in the inner cavity of the valve housing, a valve seat at the bottom of the connecting shell, a sealing cylinder fixedly connected to the inner cavity of the valve seat, an auxiliary sealing assembly at the bottom of the inner cavity of the valve seat, an inlet pipe on one side of the valve seat, and an outlet pipe on the other side of the valve seat. The electromagnetic sealing assembly includes a magnetic head, which is fixedly connected to the top of the valve housing. A rod is provided at the bottom of the magnetic head. An inner pressure rod is movably connected to the bottom of the inner cavity of the valve housing. A pressure plate is fixedly connected to the bottom of the inner pressure rod. A spring is provided at the bottom of the pressure plate. A sealing element is provided at the bottom of the inner pressure rod.

[0008] The present invention is further configured such that the auxiliary sealing assembly includes an electromagnet, the bottom of which is fixedly connected to the bottom of the valve seat cavity, and a magnetic block is provided at the bottom of the sealing element. When the electromagnet is energized, the electromagnet pushes the magnetic block and the sealing element on its top upward, so that the inside of the valve seat is ventilated, which can be used as an emergency measure when the electromagnetic sealing assembly fails.

[0009] The present invention is further configured such that a VCR female connector is provided at the end of the air inlet pipe and the air outlet pipe away from the valve seat, and a sealing gasket is provided in the inner cavity of the VCR female connector. The VCR female connector and the VCR male connector form a compression seal. This structure can achieve efficient sealing in a vacuum environment with an extremely low leakage rate.

[0010] The present invention is further configured such that a protective shell is fixedly connected to the bottom of the valve seat, and mounting plates are provided on both sides of the protective shell. The protective shell can be fixed to the bottom of the valve seat by the mounting plates to protect the connector at the bottom of the electromagnet.

[0011] The present invention is further configured such that mounting brackets are fixedly connected to both sides of the valve body, and mounting holes are provided on the surface of the mounting brackets. By passing the mounting bolts through the mounting holes on the surface of the mounting brackets and screwing them into the fixed position, the gas shut-off valve can be fixed, thereby improving its usage efficiency.

[0012] The present invention is further configured such that a reinforcing plate is fixedly connected to both sides of the connecting shell, and the surface of the reinforcing plate is provided with mounting screws. The mounting screws are respectively passed through two through holes on the surface of the reinforcing plate and screwed into the screw holes on the surface of the connecting shell and the valve shell, thereby fixing the valve shell and the connecting shell together and facilitating disassembly.

[0013] The present invention is further configured such that a positioning ring is fixedly connected to the bottom of the inner cavity of the valve body, and a limiting sleeve is fixedly connected to both sides of the inner cavity of the positioning ring. A limiting strip is movably connected to the inner cavity of the limiting sleeve, and one side of the limiting strip is fixedly connected to the surface of the inner pressure rod. The inner pressure rod moves stably up and down in the inner cavity of the positioning ring by being limited by the limiting sleeve and the limiting strip.

[0014] The present invention is further configured such that a protective ring is fixedly connected to the inner wall of the circular groove at the top of the valve housing. The inner wall of the protective ring is in contact with the surface of the magnetic head. The protective ring wraps around the surface of the magnetic head, which can protect the magnetic head and increase the sealing performance at the connection gap between the magnetic head and the valve housing.

[0015] The present invention has the following beneficial effects.

[0016] 1. When the magnetic head of this utility model is not energized, the inner pressure rod springs up under the action of the spring to ensure normal gas passage; after energization, the electromagnetic force drives the sealing element at the lower end of the inner pressure rod to accurately block the vent hole on the surface of the sealing cylinder, forming a reliable seal. The electromagnetic drive structure moves quickly and can complete the position switching of the sealing element at the moment of energization, meeting the instantaneous requirements for gas passage and cut-off in a vacuum environment.

[0017] 2. When this utility model is in use, if the electromagnetic sealing component fails, the magnetic block and sealing component can be moved upward by energizing the electromagnet, exposing the vent hole and forcibly restoring the ventilation state, thus avoiding the paralysis of the entire vacuum system due to the failure of the sealing component and reducing the risk of downtime. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional diagram of a gas shut-off valve used in a vacuum environment.

[0020] Figure 2 This is a cross-sectional schematic diagram of a gas shut-off valve used in a vacuum environment.

[0021] Figure 3 A gas shut-off valve for use in vacuum environments Figure 2 A magnified view of a portion of point A in the middle.

[0022] Figure 4 This is a cross-sectional schematic diagram of the valve seat in a gas shut-off valve used in a vacuum environment.

[0023] Figure 5 This is a schematic diagram of a positioning ring in a gas shut-off valve used in a vacuum environment. In the attached diagram: 1. Valve housing; 2. Connecting shell; 3. Electromagnetic sealing assembly; 4. Valve seat; 5. Sealing cylinder; 6. Auxiliary sealing assembly; 7. Inlet pipe; 8. Outlet pipe; 301. Magnetic head; 302. Rod body; 303. Internal pressure rod; 304. Pressure plate; 305. Spring; 306. Seal; 601. Electromagnet; 602. Magnetic block; 9. VCR female connector; 10. Positioning ring; 11. Limiting sleeve; 12. Limiting strip. Detailed Implementation

[0024] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1

[0026] Please see Figure 1-5This utility model is a gas shut-off valve for use in a vacuum environment, including a valve body 1, a connecting shell 2 at the bottom of the valve body 1, an electromagnetic sealing assembly 3 in the inner cavity of the valve body 1, a valve seat 4 at the bottom of the connecting shell 2, a sealing cylinder 5 fixedly connected to the inner cavity of the valve seat 4, an auxiliary sealing assembly 6 at the bottom of the inner cavity of the valve seat 4, an inlet pipe 7 on one side of the valve seat 4, and an outlet pipe 8 on the other side of the valve seat 4. The electromagnetic sealing assembly 3 includes a magnetic head 301, which is fixedly connected to the top of the valve body 1. A rod 302 is provided at the bottom of the magnetic head 301. An inner pressure rod 303 is movably connected to the bottom of the inner cavity of the valve body 1. A pressure plate 304 is fixedly connected to the bottom of the inner pressure rod 303. A spring 305 is provided at the bottom of the pressure plate 304. A sealing element 306 is provided at the bottom of the inner pressure rod 303.

[0027] Specifically: This gas shut-off valve is used in a vacuum environment as a switch channel for introducing working gas into the vacuum environment. When the magnetic head 301 is not energized, the inner pressure rod 303 is in a spring-lifted state under the action of the spring 305. At this time, gas can enter the vacuum environment through the air inlet. After the magnetic head 301 is energized by a specific electromagnetic coil used in conjunction with it, an electromagnetic force is generated on the inner pressure rod 303 under electromagnetic action, causing the sealing element 306 at the lower end of the inner pressure rod 303 to move downward and block the vent hole on the surface of the sealing cylinder 5 inside the valve seat 4, thereby achieving a sealing effect.

[0028] Example 2

[0029] Please see Figure 1-5 Based on Embodiment 1, the auxiliary sealing assembly 6 includes an electromagnet 601, the bottom of which is fixedly connected to the bottom of the inner cavity of the valve seat 4. A magnetic block 602 is provided at the bottom of the sealing element 306. A VCR female connector 9 is provided at the end of the inlet pipe 7 and outlet pipe 8 away from the valve seat 4. A sealing gasket is provided in the inner cavity of the VCR female connector 9. A protective shell is fixedly connected to the bottom of the valve seat 4. Mounting plates are provided on both sides of the protective shell. Mounting brackets are fixedly connected to both sides of the valve housing 1. Mounting holes are provided on the surface. Reinforcing plates are fixedly connected to both sides of the connecting shell 2. Mounting screws are provided on the surface of the reinforcing plates. A positioning ring 10 is fixedly connected to the bottom of the inner cavity of the valve shell 1. Limiting sleeves 11 are fixedly connected to both sides of the inner cavity of the positioning ring 10. A limiting strip 12 is movably connected to the inner cavity of the limiting sleeve 11. One side of the limiting strip 12 is fixedly connected to the surface of the inner pressure rod 303. A protective ring is fixedly connected to the inner wall of the circular groove at the top of the valve shell 1. The inner wall of the protective ring is in contact with the surface of the magnetic head 301.

[0030] Specifically: When the electromagnet 601 is energized, it pushes the magnetic block 602 and its top seal 306 upwards, creating an air-permeable state inside the valve seat 4. This can be used as an emergency measure in case the electromagnetic sealing assembly 3 fails. The VCR female connector 9 and the VCR male connector form a compression seal. This structure can achieve highly efficient sealing in a vacuum environment with an extremely low leakage rate. The protective shell can be fixed to the bottom of the valve seat 4 by the mounting plate to protect the connector at the bottom of the electromagnet 601. The mounting bolts are passed through the mounting holes on the surface of the mounting bracket and then screwed on. The gas shut-off valve can be fixed in a fixed position to improve its efficiency. The mounting screws are inserted through the two through holes on the surface of the reinforcing plate and screwed into the screw holes on the surfaces of the connecting shell 2 and the valve shell 1, thereby fixing the valve shell 1 and the connecting shell 2 together and facilitating disassembly. The inner pressure rod 303 moves stably up and down in the inner cavity of the positioning ring 10 by being limited by the limiting sleeve 11 and the limiting strip 12. The protective ring wraps around the surface of the magnetic head 301, which can protect the magnetic head 301 and increase the sealing of the gap between the magnetic head 301 and the valve shell 1.

[0031] The working principle of this utility model is as follows: This gas shut-off valve is used in a vacuum environment as a switch channel for introducing working gas into the vacuum environment. When the magnetic head 301 is not energized, the inner pressure rod 303 is in a spring-lifted state under the action of the spring 305. At this time, the gas can enter the vacuum environment through the air inlet. After the magnetic head 301 is energized by a specific electromagnetic coil used in conjunction with it, it generates an electromagnetic force on the inner pressure rod 303 under electromagnetic action, causing the sealing part 306 at the lower end of the inner pressure rod 303 to move downward and block the vent hole on the surface of the sealing cylinder 5 inside the valve seat 4, thus achieving a sealing effect. When the electromagnetic sealing assembly 3 malfunctions and it is necessary to open the gas shut-off valve, the electromagnet 601 can be energized. The electromagnet 601 pushes the magnetic block 602 and the sealing part 306 on its top upward until the vent hole on the surface of the sealing cylinder 5 is exposed, so that the inside of the valve seat 4 is ventilated. This can be used as an emergency measure when the electromagnetic sealing assembly 3 malfunctions.

[0032] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A gas shut-off valve for use in a vacuum environment, comprising a valve body (1), characterized in that: The valve housing (1) is provided with a connecting shell (2) at the bottom, and an electromagnetic sealing assembly (3) is provided in the inner cavity of the valve housing (1). The valve seat (4) is provided at the bottom of the connecting shell (2). A sealing cylinder (5) is fixedly connected to the inner cavity of the valve seat (4). An auxiliary sealing assembly (6) is provided at the bottom of the inner cavity of the valve seat (4). An air inlet pipe (7) is provided on one side of the valve seat (4), and an air outlet pipe (8) is provided on the other side of the valve seat (4). The electromagnetic sealing assembly (3) includes a magnetic head (301), which is fixedly connected to the top of the valve housing (1). A rod (302) is provided at the bottom of the magnetic head (301). An inner pressure rod (303) is movably connected to the bottom of the inner cavity of the valve housing (1). A pressure plate (304) is fixedly connected to the bottom of the inner pressure rod (303). A spring (305) is provided at the bottom of the pressure plate (304). A sealing element (306) is provided at the bottom of the inner pressure rod (303).

2. A gas shut-off valve for use in a vacuum environment according to claim 1, characterized in that: The auxiliary sealing assembly (6) includes an electromagnet (601), the bottom of which is fixedly connected to the bottom of the inner cavity of the valve seat (4), and a magnetic block (602) is provided at the bottom of the sealing element (306).

3. A gas shut-off valve for use in a vacuum environment according to claim 1, characterized in that: The inlet pipe (7) and outlet pipe (8) are provided with a VCR female connector (9) at the end away from the valve seat (4), and the inner cavity of the VCR female connector (9) is provided with a sealing gasket.

4. A gas shut-off valve for use in a vacuum environment according to claim 1, characterized in that: The bottom of the valve seat (4) is fixedly connected to a protective shell, and mounting plates are provided on both sides of the protective shell.

5. A gas shut-off valve for use in a vacuum environment according to claim 1, characterized in that: Both sides of the valve body (1) are fixedly connected to mounting brackets, and mounting holes are provided on the surface of the mounting brackets.

6. A gas shut-off valve for use in a vacuum environment according to claim 1, characterized in that: Both sides of the connecting shell (2) are fixedly connected with reinforcing plates, and the surface of the reinforcing plates is provided with mounting screws.

7. A gas shut-off valve for use in a vacuum environment according to claim 1, characterized in that: A positioning ring (10) is fixedly connected to the bottom of the inner cavity of the valve body (1). Limiting sleeves (11) are fixedly connected to both sides of the inner cavity of the positioning ring (10). A limiting strip (12) is movably connected to the inner cavity of the limiting sleeve (11). One side of the limiting strip (12) is fixedly connected to the surface of the inner pressure rod (303).

8. A gas shut-off valve for use in a vacuum environment according to claim 1, characterized in that: A protective ring is fixedly connected to the inner wall of the circular groove at the top of the valve housing (1), and the inner wall of the protective ring is in contact with the surface of the magnetic head (301).

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