Directional movement vacuum sealing structure

Abstract

The utility model relates to the technical field of particle accelerators, in particular to a directional moving vacuum sealing structure which comprises a moving rod, a sealing guide assembly, a water inlet waterway assembly and a water return waterway assembly. The sealing guide assembly comprises a graphite sleeve, a first fluororubber O-shaped sealing ring, a second fluororubber O-shaped sealing ring, a pressing ring, a guide flange, a pressing cover and a hexagon head bolt. The moving rod penetrates through an inner hole of the guide flange, the first fluororubber O-shaped sealing ring, the pressing ring and the second fluororubber O-shaped sealing ring are sequentially installed in the guide flange, then the graphite sleeve is installed on the guide flange, finally, the graphite sleeve is covered with the gland, the hexagon head bolt is tightened, and the gland and the guide flange are fixed. The first fluororubber O-shaped sealing ring and the second fluororubber O-shaped sealing ring are deformed, so that a gap between the moving rod and the guide flange is sealed, the other end of the moving rod can be connected with a motor, and movement in a vacuum state can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of particle accelerator technology, and in particular to a directional moving vacuum sealing structure. Background Technology

[0002] A synchrotron radiation source is a physical device that generates synchrotron radiation. It is a high-performance, novel, and powerful light source that utilizes the deflection of relativistic electrons (or positrons) in a magnetic field to produce synchrotron radiation. The vacuum tube is a crucial component of a synchrotron radiation source; the synchrotron radiation striking the inner wall of the vacuum tube generates a significant heat load.

[0003] In the field of particle accelerators, shielding blocks need to be installed on the vacuum pipes to block certain ion beams inside the vacuum pipes. The shielding blocks also need to be directionally moved and adjusted, and the shielding blocks need to be controlled at a suitable temperature. Due to the spatial structure limitations of the vacuum pipes, the structure needs to be compact while meeting the functional requirements and achieving a high cost-performance ratio.

[0004] Since conventional sealing structures are static seals, they cannot remotely control the movement of the shielding block while the accelerator is running. In order to achieve position control of the shielding block under different usage conditions, adjustments can only be made when the accelerator is stopped, which results in a huge waste of resources.

[0005] Therefore, there is an urgent need to design a motion-type sealing structure that can adjust the movement of the shielding block through a remote control system connected to the motor during normal operation of the accelerator, without causing a decrease in the overall vacuum level of the equipment, thus ensuring that the entire accelerator can operate smoothly in a vacuum state. Utility Model Content

[0006] The purpose of this invention is to provide a directional moving vacuum sealing structure, which aims to adjust the movement of the shielding block through a remote control system connected to a motor during normal operation of the accelerator, without causing a decrease in the overall vacuum level of the equipment, thus ensuring that the entire accelerator can operate stably under vacuum.

[0007] To achieve the above objectives, this utility model provides a directional moving vacuum sealing structure, including a moving rod, a sealing guide assembly, an inlet water passage assembly, and a return water passage assembly. The inlet water passage assembly is fixedly connected to the moving rod and located on one side of the moving rod. The return water passage assembly is fixedly connected to the moving rod and located on the side of the moving rod away from the inlet water passage assembly. The sealing guide assembly is sleeved on the outside of the moving rod. The sealing guide assembly includes a graphite sleeve, a first fluororubber O-ring, a second fluororubber O-ring, a pressure ring, and a guide flange. The system includes a pressure cap and hexagonal head bolts; the guide flange is located outside the moving rod; the first fluororubber O-ring is located inside the guide flange; the pressure ring is located on one side of the first fluororubber O-ring; the second fluororubber O-ring is located on the side of the pressure ring away from the first fluororubber O-ring; the graphite sleeve is located on the side of the second fluororubber O-ring away from the pressure ring; the pressure cap is located on the side of the guide flange near the water inlet assembly; and the hexagonal head bolts are threadedly connected to the pressure cap and penetrate the pressure cap.

[0008] The water inlet assembly includes a water inlet device and a water inlet connector. The water inlet device is fixedly connected to the moving rod and is located on the side of the moving rod away from the return water inlet assembly. The water inlet connector is connected to the water inlet device and is located outside the water inlet device.

[0009] The water return circuit assembly includes a connector and a return water device. The connector is fixedly connected to the moving rod and is located on the side of the moving rod away from the water inlet. The return water device is fixedly connected to the connector and is located on the side of the connector away from the moving rod.

[0010] The sealing guide assembly further includes a flat washer, which is disposed between the gland and the hexagonal head bolt.

[0011] The gap between the outer diameter of the moving rod and the inner diameter of the graphite sleeve is in the range of 0-0.02mm.

[0012] This utility model discloses a directional moving vacuum sealing structure. The moving rod passes through the inner hole of the guide flange, and a first fluororubber O-ring, a pressure ring, and a second fluororubber O-ring are sequentially installed inside the guide flange. A graphite sleeve is then installed onto the guide flange. Finally, a pressure cap is placed over the graphite sleeve, and hexagonal head bolts are tightened to fix the pressure cap and the guide flange. This causes the first and second fluororubber O-rings to deform, thereby sealing the gap between the moving rod and the guide flange. A motor can be connected to one end of the moving rod near the water inlet assembly, enabling movement under vacuum. The pressure cap has conical ends, and the guide flange serves as the sealing structure. The carrier, the surface of the moving rod must be smooth (roughness Ra0.8), and its outer diameter must fit well with the inner diameter of the graphite sleeve, ensuring a clearance within 0-0.02mm. Simultaneously, the inner diameters of the first and second fluororubber O-rings must be interference-fitted with the moving rod, with an inner diameter deformation range of 15%-20%. The contact surfaces between the moving rod and the first and second fluororubber O-rings must be smooth. The water inlet assembly is used to introduce water into the moving rod, and the water return assembly is used to return water to the moving rod. The sealing guide assembly can be positioned and moved under vacuum conditions and also has a certain self-locking function. It has a compact structure and high cost-effectiveness. This sealing structure allows for adjustment of the shielding block's movement via a remote control system connected to the motor during normal accelerator operation without causing a decrease in the overall equipment vacuum, ensuring stable operation of the entire accelerator under vacuum conditions. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of a directional moving vacuum sealing structure according to the present invention.

[0015] Figure 2 This is a cross-sectional view of a sealing guide component of a directional moving vacuum sealing structure according to this utility model.

[0016] In the diagram: 1-Motion rod, 2-Graphite sleeve, 3-First fluororubber O-ring, 4-Second fluororubber O-ring, 5-Pressure ring, 6-Guide flange, 7-Gland, 8-Hex head bolt, 9-Flat washer, 10-Inlet device, 11-Inlet connector, 12-Connector, 13-Return device. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0018] Please see Figures 1 to 2 This utility model provides a directional moving vacuum sealing structure, including a moving rod 1, a sealing guide assembly, a water inlet assembly, and a water return assembly. The water inlet assembly is fixedly connected to the moving rod 1 and is located on one side of the moving rod 1. The water return assembly is fixedly connected to the moving rod 1 and is located on the side of the moving rod 1 away from the water inlet assembly. The sealing guide assembly is sleeved on the outside of the moving rod 1. The sealing guide assembly includes a graphite sleeve 2, a first fluororubber O-ring 3, a second fluororubber O-ring 4, a pressure ring 5, a guide flange 6, a pressure cap 7, and a hexagonal head bolt 8.

[0019] The guide flange 6 is located on the outside of the moving rod 1. The first fluororubber O-ring 3 is located inside the guide flange 6. The pressure ring 5 is located on one side of the first fluororubber O-ring 3. The second fluororubber O-ring 4 is located on the side of the pressure ring 5 away from the first fluororubber O-ring 3. The graphite sleeve 2 is located on the side of the second fluororubber O-ring 4 away from the pressure ring 5. The pressure cap 7 is located on the side of the guide flange 6 near the water inlet assembly. The hexagonal head bolt 8 is threadedly connected to the pressure cap 7 and passes through the pressure cap 7.

[0020] In this embodiment, the moving rod 1 passes through the inner hole of the guide flange 6, and the first fluororubber O-ring 3, the pressure ring 5, and the second fluororubber O-ring 4 are sequentially installed inside the guide flange 6. Then, the graphite sleeve 2 is installed onto the guide flange 6. Finally, the pressure cap 7 is placed over the graphite sleeve 2, and the hexagonal head bolts 8 are tightened to fix the pressure cap 7 and the guide flange 6. This causes the first fluororubber O-ring 3 and the second fluororubber O-ring 4 to deform, thereby sealing the gap between the moving rod 1 and the guide flange 6. The end of the moving rod 1 near the water inlet assembly can be connected to a motor, enabling movement under vacuum. The pressure cap 7 has conical ends, and the guide flange 6 serves as a sealing structure. The carrier, the surface of the moving rod 1, must be smooth (roughness Ra0.8), and its outer diameter must fit well with the inner diameter of the graphite sleeve 2, ensuring a fit clearance within 0-0.02mm. Simultaneously, the inner diameters of the first fluororubber O-ring 3 and the second fluororubber O-ring 4 must be interference-fitted with the moving rod 1, with an inner diameter deformation range of 15%-20%. The contact surfaces between the moving rod 1 and the first and second fluororubber O-rings 3 and 4 must be smooth. The water inlet assembly is used to introduce water into the moving rod 1, and the water return assembly is used to return water to the moving rod 1. The sealing guide assembly can be positioned and moved under vacuum conditions and also has a certain self-locking function. It has a compact structure and high cost-effectiveness. This sealing structure allows the movement of the shielding block to be adjusted via a remote control system connected to the motor during normal accelerator operation without causing a decrease in the overall equipment vacuum, ensuring stable operation of the entire accelerator under vacuum conditions.

[0021] Furthermore, the water inlet assembly includes a water inlet 10 and a water inlet connector 11. The water inlet 10 is fixedly connected to the moving rod 1 and is located on the side of the moving rod 1 away from the return water assembly. The water inlet connector 11 is connected to the water inlet 10 and is located outside the water inlet 10.

[0022] In this embodiment, the water inlet connector 11 is connected to a water source to supply water to the water inlet device 10, and the water inlet device 10 is welded and fixed to the moving rod 1 to supply water to the moving rod 1.

[0023] Furthermore, the return water circuit assembly includes a connector 12 and a return water device 13. The connector 12 is fixedly connected to the moving rod 1 and is located on the side of the moving rod 1 away from the water inlet 10. The return water device 13 is fixedly connected to the connector 12 and is located on the side of the connector 12 away from the moving rod 1.

[0024] In this embodiment, the connection head 12 is provided to facilitate the welding and fixing of the return water device 13 to the moving rod 1. The return water device 13 is used to guide the water flow introduced by the moving rod 1 back to the moving rod 1 for water return.

[0025] Furthermore, the sealing guide assembly also includes a flat washer 9, which is disposed between the gland 7 and the hexagonal head bolt 8.

[0026] In this embodiment, the flat washer 9 is provided to strengthen the fixation of the hexagonal head bolt 8 to the gland 7, thereby improving the fixing effect between the gland 7 and the guide flange 6.

[0027] The above-disclosed embodiments are merely preferred embodiments of a directional moving vacuum sealing structure of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments, and equivalent variations made in accordance with the claims of this application, still fall within the scope of this application.

Claims

1. A directional moving vacuum sealing structure, characterized in that, The device includes a moving rod, a sealing guide assembly, an inlet water circuit assembly, and a return water circuit assembly. The inlet water circuit assembly is fixedly connected to the moving rod and located on one side of the moving rod. The return water circuit assembly is fixedly connected to the moving rod and located on the side of the moving rod away from the inlet water circuit assembly. The sealing guide assembly is sleeved on the outside of the moving rod. The sealing guide assembly includes a graphite sleeve, a first fluororubber O-ring, a second fluororubber O-ring, a pressure ring, a guide flange, a pressure cap, and hexagonal head bolts. The guide flange is located on the outside of the moving rod. The first fluororubber O-ring is located inside the guide flange. The pressure ring is located on one side of the first fluororubber O-ring. The second fluororubber O-ring is located on the side of the pressure ring away from the first fluororubber O-ring. The graphite sleeve is located on the side of the second fluororubber O-ring away from the pressure ring. The pressure cap is located on the side of the guide flange near the water inlet assembly. The hexagonal head bolt is threaded to the pressure cap and passes through the pressure cap.

2. The directional moving vacuum sealing structure as described in claim 1, characterized in that, The water inlet assembly includes a water inlet device and a water inlet connector. The water inlet device is fixedly connected to the moving rod and is located on the side of the moving rod away from the return water assembly. The water inlet connector is connected to the water inlet device and is located outside the water inlet device.

3. The directional moving vacuum sealing structure as described in claim 2, characterized in that, The return water circuit assembly includes a connector and a return water device. The connector is fixedly connected to the moving rod and is located on the side of the moving rod away from the inlet. The return water device is fixedly connected to the connector and is located on the side of the connector away from the moving rod.

4. The directional moving vacuum sealing structure as described in claim 1, characterized in that, The sealing guide assembly also includes a flat washer disposed between the gland and the hexagonal head bolt.

5. The directional moving vacuum sealing structure as described in claim 1, characterized in that, The gap between the outer diameter of the moving rod and the inner diameter of the graphite sleeve is in the range of 0-0.02mm.

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