A vacuum isolation valve suitable for large cavities

Abstract

The present invention discloses a vacuum isolation valve suitable for a large cavity, which can isolate a large cavity to form two independent spaces, comprising an isolation valve support frame, a valve support frame, a valve, a spring mechanism and a radial drive mechanism, wherein the lower surface of the isolation valve support frame is fixedly connected with a guide rail, and the inside of the guide rail is fixedly connected with a vacuum motor, and the vacuum isolation valve suitable for the large cavity, the valve isolates the sample cavity and the scattering cavity to form two independent spaces, the valve is installed in the sample cavity, when the sample environment is changed, the vacuum motor is started, the vacuum motor drives the threaded rod to rotate, the slider slides inside the guide rail, and the valve can be driven to move vertically upward, after moving to the top, the valve is converted into radial movement under the action of the radial drive mechanism, moves from the inside of the sample cavity to the cavity sealing surface, and seals the scattering cavity to protect the vacuum environment of the scattering cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of isolation valves, and in particular to a vacuum isolation valve suitable for a large cavity. Background Art

[0002] Neutron scattering spectrometers use large chambers, requiring time-consuming vacuum pumping and evacuation operations when changing samples and equipment. Using an isolation valve can separate the chamber into two compartments: the scattering chamber and the sample chamber, allowing operations to be performed solely in the sample chamber, reducing pumping time. The two chambers are connected by a sealing frame, and existing one-way isolation valves are unable to quickly and effectively seal complex chambers, limiting their efficiency. Summary of the Invention

[0003] The main purpose of the present invention is to provide a vacuum isolation valve suitable for a large cavity, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A vacuum isolation valve suitable for a large cavity comprises an isolation valve support frame, a valve support frame, a valve, a spring mechanism and a radial drive mechanism, wherein the lower surface of the isolation valve support frame is fixedly connected to a guide rail, a vacuum motor is fixedly connected to the inside of the guide rail, the output end of the vacuum motor is fixedly connected to a reducer, the output end of the reducer is fixedly connected to a threaded rod, the outer surface of the threaded rod is threadedly connected to a slider, the upper surface of the slider is fixedly connected to the valve support frame, a spring mechanism is provided on the valve support frame, the upper surface of the valve support frame is fixedly connected to the radial drive mechanism, and the radial drive mechanism is fixedly connected to the lower surface of the valve.

[0006] As a vacuum isolation valve suitable for a large cavity of the present invention, a slider is slidably connected to the interior of the guide rail.

[0007] As a vacuum isolation valve suitable for a large cavity of the present invention, the radial drive mechanism includes a fixed seat, a pin shaft, a rotating rod and a movable seat.

[0008] As a vacuum isolation valve suitable for a large cavity of the present invention, a pin is inserted into the interior of the fixed seat, the fixed seat is connected to the rotating rod through the pin, and the end of the rotating rod away from the fixed seat is connected to the movable seat through the pin.

[0009] As a vacuum isolation valve suitable for a large cavity of the present invention, the spring mechanism includes a guide positioning sleeve, a spring sleeve, a spring, a locking nut and a guide rod.

[0010] As a vacuum isolation valve suitable for a large cavity of the present invention, one end of the spring sleeve is fixedly connected to a guide positioning sleeve, the lower surface of the spring sleeve is fixedly connected to a spring, a guide rod is inserted into the interior of the guide positioning sleeve and the spring sleeve, and the outer surface of the guide rod is threadedly connected to a locking nut.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The valve is installed in the sample chamber. When the sample environment is changed, the vacuum motor is started. The vacuum motor drives the threaded rod to rotate, so that the slider slides inside the guide rail, which can drive the valve to move vertically upward. After moving to the top, the valve is converted into radial movement under the action of the radial drive mechanism, and moves from the inside of the sample chamber to the cavity sealing surface, and seals the scattering chamber to protect the vacuum environment of the scattering chamber. After the sample environment is replaced, the sample chamber is in a vacuum environment. The valve moves radially under the action of the spring, breaks away from the sealing surface and completely enters the sample chamber, and moves to the bottom of the sample chamber, so that the scattering chamber and the sample chamber share a vacuum environment.

[0013] 2. The vacuum isolation valve suitable for large cavities provides a guide rail installation position space through the isolation valve support frame. The guide rail is fixed on the isolation valve support frame. The isolation valve support frame is fixed on the sample cavity after being adjusted up and down during installation, providing installation position and space for the guide rail, vacuum motor and reducer. The valve support frame is assembled by multiple plates through bolts. The main function of the radial drive mechanism is to drive the window to move radially and provide preload force to seal the scattering cavity. The main function of the spring mechanism is to support the sealing window and drive the radial drive mechanism to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the axonometric structure of a vacuum isolation valve suitable for a large cavity according to Example 1 of the present invention;

[0015] Figure 2 This is a schematic diagram of the axonometric structure of a vacuum isolation valve suitable for a large cavity, viewed from above, according to Example 1 of the present invention;

[0016] Figure 3 This is a schematic diagram of the axonometric structure of a guide rail in a vacuum isolation valve suitable for a large cavity according to embodiment 1 of the present invention;

[0017] Figure 4 This is a schematic diagram of the axonometric structure of a radial drive mechanism in a vacuum isolation valve suitable for a large cavity according to Example 1 of the present invention;

[0018] Figure 5 This is an isometric structural diagram of a spring mechanism in a vacuum isolation valve suitable for a large cavity according to Example 1 of the present invention;

[0019] Figure 6This is a schematic diagram of the axonometric structure of a valve in a vacuum isolation valve suitable for a large cavity according to Example 1 of the present invention;

[0020] Figure 7 This is a schematic diagram of the axonometric structure of a valve support frame in a vacuum isolation valve suitable for a large cavity according to Example 1 of the present invention.

[0021] In the figure: 1. Isolation valve support frame; 2. Valve support frame; 3. Valve; 4. Spring mechanism; 401. Guide and positioning sleeve; 402. Spring sleeve; 403. Spring; 404. Locking nut; 405. Guide rod; 5. Radial drive mechanism; 501. Fixed seat; 502. Pin; 503. Rotating rod; 504. Moving seat; 6. Guide rail; 7. Vacuum motor; 8. Reducer; 9. Threaded rod; 10. Slider. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] Example 1

[0024] like Figure 1-7 As shown, a vacuum isolation valve suitable for a large cavity includes an isolation valve support frame 1, a valve support frame 2, a valve 3, a spring mechanism 4 and a radial drive mechanism 5. The lower surface of the isolation valve support frame 1 is fixedly connected to a guide rail 6, and a vacuum motor 7 is fixedly connected to the inside of the guide rail 6. The output end of the vacuum motor 7 is fixedly connected to a reducer 8, and the output end of the reducer 8 is fixedly connected to a threaded rod 9. The outer surface of the threaded rod 9 is threadedly connected to a slider 10, and the upper surface of the slider 10 is fixedly connected to the valve support frame 2. The spring mechanism 4 is provided on the upper surface of the valve support frame 2, and the upper surface of the valve support frame 2 is fixedly connected to the radial drive mechanism 5, and the radial drive mechanism 5 is fixedly connected to the lower surface of the valve 3.

[0025] During specific use, the sample chamber and the scattering chamber are separated by valve 3 to form two independent spaces. Valve 3 is installed in the sample chamber. When the sample environment is changed, the vacuum motor 7 is started, and the vacuum motor drives the threaded rod 9 to rotate, causing the slider 10 to slide inside the guide rail 6, which can drive the valve 3 to move vertically upward. After moving to the top, the valve 3 is converted to radial movement under the action of the radial drive mechanism 5, moving from the inside of the sample chamber to the cavity sealing surface, and sealing the scattering chamber to protect the vacuum environment of the scattering chamber. After the sample environment is changed, the sample chamber is in a vacuum environment. The valve moves radially under the action of the spring 4, disengaging from the sealing surface and completely entering the sample chamber, moving to the bottom of the sample chamber, so that the scattering chamber and the sample chamber share a vacuum environment, which is simple to operate and labor-saving.

[0026] In this embodiment, the guide rail 6 is internally slidably connected to the slider 10, and the radial drive mechanism 5 includes a fixed seat 501, a pin 502, a rotating rod 503 and a movable seat 504. The fixed seat 501 is internally plugged with a pin 502, and the fixed seat 501 and the rotating rod 503 are connected through the pin 502. The end of the rotating rod 503 away from the fixed seat 501 is connected to the movable seat 504 through the pin 502. The spring mechanism 4 includes a guide positioning sleeve 401, a spring sleeve 402, a spring 403, a locking nut 404 and a guide rod 405. One end of the spring sleeve 402 is fixedly connected to the guide positioning sleeve 401, and the lower surface of the spring sleeve 402 is fixedly connected to the spring 403. The guide rod 405 is internally plugged with the guide positioning sleeve 401 and the spring sleeve 402, and the outer surface of the guide rod 405 is threadedly connected with the locking nut 404.

[0027] During specific use, the isolation valve support frame 1 is used to provide a space for installing the guide rail 6. The guide rail 6 is fixed on the isolation valve support frame 1. The isolation valve support frame 1 is adjusted up and down during installation and then fixed on the sample chamber, providing installation positions and space for the guide rail 6, vacuum motor 7 and reducer 8. The valve support frame 2 is assembled from multiple plates by bolts. The main function of the radial drive mechanism 5 is to drive the window to move radially and provide a preload force to seal the scattering cavity. The main function of the spring mechanism 4 is to support the sealing window and drive the radial drive mechanism to rotate.

[0028] Working principle: When the project is operating normally, valve 3 is opened and valve 3 moves to the bottom of the sample chamber. The scattering chamber and the sample chamber share a vacuum environment. When the sample environment is changed, the vacuum motor 7 is started and the vacuum motor 7 drives the threaded rod 9 to rotate, so that the slider 10 slides inside the guide rail 6, which can drive the valve 3 to move vertically upward, seal the scattering chamber, and protect the vacuum environment of the scattering chamber. The operation is simple and labor-saving. The guide rail 6 installation position space is provided by the isolation valve support frame 1, and the guide rail 6 is fixed on the isolation valve support frame 1. The isolation valve support frame 1 is fixed on the sample chamber after being adjusted up and down during installation, providing installation position and space for the guide rail 6, vacuum motor 7 and reducer 8. The valve support frame 2 is assembled by multiple plates through bolts. The main function of the radial drive mechanism 5 is to drive the window from vertical movement to radial movement and provide preload force to seal the scattering chamber. The main function of the spring mechanism 4 is to make the valve in the sealed state move radially, break away from the sealing surface and enter the sample chamber.

[0029] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum isolation valve suitable for a large cavity, which can isolate a large cavity into two independent spaces, characterized by: The invention comprises an isolation valve support frame (1), a valve support frame (2), a valve (3), a spring mechanism (4) and a radial drive mechanism (5); the lower surface of the isolation valve support frame (1) is fixedly connected to a guide rail (6); the inside of the guide rail (6) is fixedly connected to a vacuum motor (7); the output end of the vacuum motor (7) is fixedly connected to a reducer (8); the output end of the reducer (8) is fixedly connected to a threaded rod (9); the outer surface of the threaded rod (9) is threadedly connected to a slider (10); the upper surface of the slider (10) is fixedly connected to the valve support frame (2); the spring mechanism (4) is arranged on the upper surface of the valve support frame (2); the upper surface of the valve support frame (2) is fixedly connected to the radial drive mechanism (5); the radial drive mechanism (5) is fixedly connected to the lower surface of the valve (3).

2. A vacuum isolation valve suitable for a large cavity according to claim 1, characterized in that: A slider (10) is slidably connected inside the guide rail (6).

3. A vacuum isolation valve suitable for a large cavity according to claim 1, characterized in that: The radial drive mechanism (5) comprises a fixed seat (501), a pin shaft (502), a rotating rod (503) and a movable seat (504).

4. A vacuum isolation valve suitable for a large cavity according to claim 3, characterized in that: A pin shaft (502) is inserted into the interior of the fixed seat (501), and the fixed seat (501) is connected to the rotating rod (503) via the pin shaft (502); and one end of the rotating rod (503) away from the fixed seat (501) is connected to the movable seat (504) via the pin shaft (502).

5. A vacuum isolation valve suitable for a large cavity according to claim 1, characterized in that: The spring mechanism (4) comprises a guide positioning sleeve (401), a spring sleeve (402), a spring (403), a locking nut (404) and a guide rod (405).

6. A vacuum isolation valve suitable for a large cavity according to claim 5, characterized in that: One end of the spring sleeve (402) is fixedly connected to a guide and positioning sleeve (401), a lower surface of the spring sleeve (402) is fixedly connected to a spring (403), a guide rod (405) is inserted into the interior of the guide and positioning sleeve (401) and the spring sleeve (402), and a locking nut (404) is threadedly connected to the outer surface of the guide rod (405).

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