Phase selector without cover for switching between operating states

Abstract

The application discloses a phase selector which can switch working states without opening a cover, comprising a lifting device arranged above an accelerator cover plate, a magnetic shielding device, a driving device arranged above and below the accelerator cover plate, a transmission mechanism arranged below the accelerator cover plate, a phase selector, and a general frame which is connected with the driving device upward and the transmission mechanism downward; a part of the transmission rod is arranged outside a vacuum chamber and is used for connecting a rotary motor; a part of the transmission rod is arranged inside the vacuum chamber and is used for connecting a transmission center; and the transmission rod controls two phase drivers respectively through the transmission mechanism, so that the two phase drivers move respectively and are not affected by each other; the application uses one transmission rod to replace two transmission rods, realizes the minimum size of the circumference of the transmission rod, and uses one transmission rod to control two phase drivers respectively, so that the two phase drivers move respectively and are not affected by each other, thereby avoiding the problem that the large size of the circumference of the transmission rod is easy to cause vacuum leakage at the joint of the atmosphere and the vacuum.

Description

Technical Field

[0001] This invention relates to a phase selector, and more specifically to a phase selector that switches operating states without opening the cover. Background Technology

[0002] Inside a cyclotron, the beam cross-section is often a superposition of multiple beam loops. These multiple beam loops are the superposition of multiple energy beams, each energy level corresponding to a trajectory. The higher the energy of the beam, the larger its trajectory radius. However, the loops are not completely separated but rather overlapped in many places. Generally, the overlap between loops is more pronounced closer to the accelerator's center, and less so closer to the accelerator's larger radius, where the beam energy increases significantly.

[0003] When we only need to extract a beam of one type of energy, we need to block beams that do not belong to the current energy level. This is called beam blocking, and the purpose of beam blocking is to extract a beam of a single energy level per turn. However, single-turn single-energy extraction is only one requirement; multi-turn extraction is another. When multi-turn extraction is required instead of single-turn extraction, the beam blocking device must be removed.

[0004] One of the challenges in achieving beam selection is that the target rod can block the beam. For example... Figure 8a The method shown involves installing a beam clamping device at the head of the stripping target and moving it radially to clamp the beam at different radial positions. The advantage of this method is that when beam clamping is not needed, the target rod can be radially retracted to... Figure 8a As shown in the diagram, the beam clamping device and the target rod are positioned so as not to obstruct the beam. However, when beam clamping is required, the target rod extends in along with the clamping device. Since the horizontal position of the target rod is precisely where the beam passes, the target rod will block the beam, which is unacceptable.

[0005] The second difficulty in achieving beam selection lies in the inability to switch between single-turn and multi-turn beam extraction without opening the cover. For example... Figure 8b The method shown could be altered by eliminating the target rod and directly placing the beam clamping devices 2-1 and 2-2 at one or more predetermined positions along the radial direction of the accelerator's central plane. While this would solve the problem of the target rod blocking the beam, the requirements change frequently. When the requirements change and multi-turn beam extraction is no longer required, the current beam clamping devices 2-1 and 2-2 must be removed. Removing the beam clamping devices 2-1 and 2-2 requires shutting down the accelerator for at least two days before opening the cover. The radiation must dissipate before disassembly and reassembly can be carried out; otherwise, the extremely high radiation could harm the human body.

[0006] In summary, the challenge of achieving beam selection inside an accelerator lies in balancing the need for the target rod to not block the beam with the need to switch between single-turn and multi-turn beam extraction without opening the cover. Summary of the Invention

[0007] To address the problems existing in the prior art, this invention proposes a phase selector that allows switching of operating states without opening the cover. The aim is to solve the problem of existing technologies where the target rod must not block the beam, and where single-turn and multi-turn lead-out switching must be achieved without opening the cover.

[0008] To address the problems existing in the prior art, the present invention proposes the following technical solution:

[0009] A phase selector with switchable operating states includes, from top to bottom and from outside to inside: a lifting device and a magnetic shielding device mounted above the accelerator cover; a drive device mounted above and below the accelerator cover; a transmission mechanism mounted below the accelerator cover; a phase selector; and an overall frame that connects and supports the drive device upwards and the transmission mechanism downwards. The lifting device moves the overall frame upwards away from the accelerator center plane or downwards to the accelerator center plane by tightening or loosening lifting bolts, thereby switching the phase selector connected to the overall frame to a non-operating state or an operating state. When the lifting device moves downwards and the phase selector is in the operating state, the drive device generates vertical and rotary driving forces in a time-sharing manner and transmits these forces to the transmission mechanism, which then ultimately drives multiple selectors to move radially along the accelerator.

[0010] Its features are:

[0011] The driving device includes a transmission rod, a vertical moving motor, and a rotary motor. When the vertical moving motor is working, it drives the rotary motor and the transmission rod to move up and down, and ultimately drives the transmission hub to move up and down. When the rotary motor is working, it drives the transmission rod to rotate, and ultimately drives the transmission hub to rotate.

[0012] The up-and-down moving motor and the rotary motor are installed in the atmospheric environment above the accelerator cover plate. Part of the transmission rod is installed outside the vacuum to connect to the rotary motor; part of the transmission rod is installed inside the vacuum to connect to the transmission hub. The transmission rod controls two phase drivers through the transmission mechanism, so that the two phase drivers move independently and do not affect each other.

[0013] The transmission mechanism includes a transmission hub, which receives the upward and downward driving forces and rotational forces of the transmission rod in a time-sharing manner. When the transmission hub receives the upward driving force and rotational force of the transmission rod in a time-sharing manner, the phase selector on the pinion moves radially. When the transmission hub receives the downward driving force and rotational force of the transmission rod in a time-sharing manner, the phase selector on the gear moves radially.

[0014] Furthermore, the driving device includes a vertical moving motor, a vertical moving motor bracket, a rotary motor, a rotary motor bracket, guide brass bolts, and a transmission rod; the vertical moving motor drives the rotary motor, the rotary motor bracket, and the transmission rod to move vertically, ultimately driving the transmission hub to move vertically; the rotary motor drives the transmission rod to rotate, ultimately driving the transmission hub to rotate; the guide brass bolts are used for the rotary motor bracket to ensure that the rotary motor maintains vertical movement when driven by the vertical moving motor; the transmission rod transmits the driving force of the vertical moving motor and the rotary motor, and transmits the driving force to the transmission hub.

[0015] Furthermore, the up-and-down moving motor is a push rod motor, which is fixed on the up-and-down moving motor bracket, and the push rod motor shaft is connected to the rotary motor bracket; the up-and-down moving motor bracket is fixedly connected to the magnetic shielding base by screws; the rotary motor is fixed on the rotary motor bracket, and the rotary motor shaft is connected to the transmission rod; the rotary motor bracket is suspended, and its two sides are slidably engaged with the guide grooves on the sides of the up-and-down moving motor bracket by guide brass bolts to restrict the rotation of the rotary motor bracket; the top of the transmission rod is connected to the rotary motor shaft, and the bottom is connected to the transmission hub.

[0016] Furthermore, the transmission mechanism includes a transmission hub, an external rotary transmission component, an internal rotary transmission component, a connecting rod, an external rotary component, an internal rotary component, a transmission gear set, a short rack, and a long rack component; wherein the transmission hub, the external rotary transmission component, the internal rotary transmission component, the connecting rod, the external rotary component, and the internal rotary component constitute a friction transmission mechanism; the rotation hub is fixedly connected to the bottom end of the transmission rod and rotates and rises and falls with the rotation and rise of the transmission rod.

[0017] Furthermore, the transmission hub is a cuboid with connecting rod hinges on both sides. The connecting rod hinges are arranged in two rows, with the upper row being the long connecting rod hinges and the lower row being the short connecting rod hinges. The upper row of hinges is symmetrically arranged on both sides of the cuboid and close to the upper surface of the cuboid, and the lower row of hinges is symmetrically arranged on both sides of the cuboid and close to the lower surface of the cuboid. The upper surface of the transmission hub also has a transmission rod hole in the middle position and bushing holes on both sides of the middle position. When the upper row of hinges receives the driving force of the transmission rod moving upward, it pushes the long connecting rod upward, causing the long connecting rod to extend outward and the short connecting rod to retract inward. When the lower row of hinges receives the driving force of the transmission rod moving downward, it pushes the short connecting rod downward, causing the long connecting rod to retract inward and the short connecting rod to extend outward.

[0018] Furthermore, the diameter of the external rotating transmission component is larger than that of the internal rotating transmission component; the inner diameter of the external rotating component is not limited to 120mm, and the inner diameter of the internal rotating component is not limited to 104mm; the diameter of the transmission rod is the minimum size that balances the minimum vacuum leakage in its circumference and the material strength, and this minimum size is not limited to 16mm.

[0019] Furthermore, when the transmission hub receives the upward driving force of the transmission rod, the transmission hub drives the external rotating transmission component to extend outward through the connecting rod, and the external rotating transmission component fits tightly with the external rotating component; then, when the transmission hub receives the rotational force of the transmission rod, the rotation of the rotation hub drives the external rotating transmission component to make a circular motion around the center of the transmission rod, indirectly controlling the rotation of the external rotating component; then the external rotating component, the external rotating transmission gear, and the short rack form a gear transmission mechanism, the external rotating component meshes with the external rotating transmission gear, driving the transmission gear to rotate, and the transmission gear meshes with the short rack, thereby driving the short rack and the phase selector on the short rack to move back and forth along the radial direction of the accelerator.

[0020] Furthermore, when the transmission center receives the downward driving force of the transmission rod, the external rotating transmission component retracts inward under the action of the connecting rod. At this time, the external rotating component and the external rotating transmission component are no longer in contact and no longer transmitting power. At this time, the internal rotating transmission component is tightly in contact with the internal rotating component. Then, when the transmission center receives the rotational force of the transmission rod, the rotation of the rotation center drives the internal rotating transmission component to make a circular motion around the center of the transmission rod, indirectly controlling the rotation of the internal rotating component. Then, the internal rotating component, the internal rotating transmission gear, and the long rack form a gear transmission mechanism. The internal rotating component meshes with the internal rotating transmission gear, driving the transmission gear to rotate. The transmission gear meshes with the long rack, thereby driving the long rack and the phase selector on the long rack to move back and forth along the radial direction of the accelerator.

[0021] Furthermore, the overall frame includes an upper sealing flange, a vertical sleeve, a reducing sleeve, a sleeve partition plate, a bottom sleeve, and a base plate. The upper sealing flange is fixedly connected to the accelerator's upper cover plate. The vertical sleeve mates with the upper sealing flange bushing and is further vacuum-sealed using an X-type sealing ring, and is also equipped with detachable screws for additional fixation. The reducing sleeve is fixedly connected to the vertical sleeve at its small radius and to the sleeve partition plate and the bottom sleeve 3-5 at its large radius. The sleeve partition plate is placed between the reducing sleeve and the bottom sleeve, with its center mates with the external rotating component of the transmission device, providing axial constraint for the external rotating component. The bottom sleeve is fixedly connected to the base plate by three screws, thereby fixing the base plate to a horizontal plane at a certain distance from the accelerator's central plane.

[0022] Furthermore, the lifting device consists of a lifting bracket and a lifting bolt. The bottom of the lifting bracket is fixedly connected to the upper sealing flange by screws, wherein the upper sealing flange is fixed to the upper cover plate of the accelerator, and the lifting bolt is connected to the threaded hole on the top of the outer shell of the magnetic shielding device through the through hole at the top of the lifting bracket.

[0023] Furthermore, the phase selector includes a phase selector mounting base and a phase selector; wherein the phase selector mounting base is fixedly mounted to the rack, and the phase selector is fixed on the phase selector mounting base; the short rack and the long rack are at the same height and are located on the same horizontal plane, and the rack closer to the center of the accelerator is the long rack, and the rack farther from the center of the accelerator is the short rack; each of the short rack and the long rack has an elongated mounting hole for mounting the phase selector, and the mounting position of the phase selector can be arbitrarily selected within the range of the elongated mounting hole; a brass bolt passes through the elongated mounting hole and is fixedly connected to the phase selector mounting base.

[0024] Advantages and effects of the present invention

[0025] 1. This invention uses one transmission rod instead of two transmission rods, achieving the smallest possible circumference of the transmission rod. This avoids the problem of vacuum leakage at the junction of the atmosphere and vacuum caused by the large circumference of the transmission rod. Specifically, only one transmission rod is used to control two phase actuators respectively, allowing the two phase actuators to move independently without being affected. Moreover, the diameter of the transmission rod is only 16mm, thus eliminating concerns about switching the beam extraction working state when the accelerator is not open.

[0026] 2. This invention, through the design of the transmission hub, enables the transmission hub to receive the driving force of only one transmission rod to control two phase actuators independently, allowing the two phase actuators to move independently without affecting each other. This eliminates concerns about switching the beam extraction working state when the accelerator cover is closed. Specifically, the transmission hub is a cuboid with connecting rod hinges on both sides. The connecting rod hinges are arranged in two rows: the upper row is for long connecting rods, and the lower row is for short connecting rods. When the upper row of hinges receives the driving force of the transmission rod moving upward, it pushes the long connecting rod upward, causing the long connecting rod to extend outward while the short connecting rod retracts inward, thus making the short connecting rod close to the external rotating component. When the lower row of hinges receives the driving force of the transmission rod moving downward, it pushes the short connecting rod downward, causing the long connecting rod to retract inward while the short connecting rod extends outward, thus making the long connecting rod close to the internal rotating component.

[0027] 3. This invention uses a gear and rack transmission, which has high precision. The rack is fixed by guide bolts and guide grooves, making it easy to disassemble and replace. It uses multi-stage transmission, and the moving speed of the phase selector can be adjusted by changing the transmission group. Attached Figure Description

[0028] Figure 1 This is an application effect diagram of the phase selector with switchable working state of the present invention;

[0029] Figure 1a The present invention provides a phase selector with switchable operating states in three dimensions. Figure 1 ;

[0030] Figure 1b The present invention provides a phase selector with switchable operating states in three dimensions. Figure 2 ;

[0031] Figure 1c The present invention provides a phase selector with switchable operating states in three dimensions. Figure 3 ;

[0032] Figure 2 This is a schematic diagram of the lifting device of the present invention;

[0033] Figure 3 This is a schematic diagram of the magnetic shielding device of the present invention;

[0034] Figure 4 This is a schematic diagram of the overall framework of the present invention;

[0035] Figure 4a This is a schematic diagram of the sealing flange of the overall frame of the present invention;

[0036] Figure 4b This is a schematic diagram of the overall frame of the variable diameter sleeve of the present invention;

[0037] Figure 4c This is a schematic diagram of the sleeve partition plate of the present invention;

[0038] Figure 4d This is a schematic diagram of the bottom sleeve of the overall frame of the present invention;

[0039] Figure 4e This is a schematic diagram of the sleeve base plate of the present invention;

[0040] Figure 5a This is a perspective view of the driving device of the present invention;

[0041] Figure 5b This is a front view of the driving device of the present invention;

[0042] Figure 5c This is a side view of the driving device of the present invention;

[0043] Figure 6a1 This is a perspective view of the transmission mechanism of the present invention;

[0044] Figure 6a2 This is a three-dimensional view of the transmission center of the present invention;

[0045] Figure 6a3 This is a front view of the transmission mechanism of the present invention;

[0046] Figure 6b This is a schematic diagram of the gear transmission mechanism of the present invention. Figure 1 ;

[0047] Figure 6c This is a schematic diagram of the gear transmission mechanism of the present invention. Figure 2 ;

[0048] Figure 6d This is a schematic diagram of the gear transmission mechanism of the present invention. Figure 3 ;

[0049] Figure 7 This is a schematic diagram of the phase selector of the present invention;

[0050] Figure 8a A cross-sectional view of the radial motion of the target stripping process in the prior art;

[0051] Figure 8b A top view showing the layout of an existing phase selector;

[0052] In the diagram: 1: Lifting device; 1-1: Lifting bolt; 1-2: Lifting bracket; 2: Magnetic shielding; 2-1: Magnetic shielding shell; 2-2: Magnetic shielding base; 3: Overall frame; 3-1: Upper sealing flange; 3-2: Vertical sleeve; 3-3: Variable diameter sleeve; 3-4: Sleeve partition plate; 3-5: Bottom sleeve; 3-6: Sleeve bottom plate; 3-7: Brass bolt; 4: Drive device; 4-1: Up and down moving motor; 4-2: Up and down moving motor bracket; 4-3: Rotary motor; 4-4: Rotary motor bracket; 4-5: Guide brass bolt; 4-6: Transmission rod; 4-7: Guide groove; 5: Transmission... Drive mechanism: 5-1: Transmission hub; 5-1-1: Long connecting rod hinge ear; 5-1-2: Short connecting rod hinge ear; 5-1-3: Transmission rod hole; 5-1-4: Bushing hole; 5-2: External rotary transmission component; 5-3: Internal rotary transmission component; 5-4: Connecting rod 8; 5-5: External rotating component; 5-6: Internal rotating component; 5-7: Transmission gear; 5-7-1: External rotary gear; 5-7-2: Internal rotary gear; 5-7-3: External rotary gear output shaft; 5-8: Short rack; 5-9: Long rack; 6: Phase selector; 6-1: Phase selector mounting base; 6-2: Phase selector. Detailed Implementation

[0053] Design principle of the invention

[0054] 1. Design challenges of this invention: ① The challenge lies in the fact that the upper end of the transmission rod 4-6 is in an atmospheric environment while the lower end is in a high-vacuum, strong magnetic environment. It is difficult to avoid vacuum leakage at the joint between the atmospheric and high-vacuum magnetic environments. Furthermore, the connection between the motor at the upper end and the transmission structure at the lower end of the transmission rod 4-6 is a dynamic seal rather than a static seal. A dynamic seal means that the transmission rod not only needs to move upwards, downwards, and rotate. Dynamic seals are more prone to vacuum leakage than static seals. Specifically: [Example of dynamic seal design would be inserted here]. Figure 5a As shown, the motor (driving component) and the transmission structure (driven component) are located at different vacuum levels. The upper end of the transmission rod 4-6 is connected to the motor 4-1, which is located at normal temperature and pressure because it is positioned above the accelerator cover. The lower end of the transmission rod 4-6 is connected to the transmission mechanism 5, which is located in a high vacuum and strong magnetic environment. ② For the same transmission rod with different vacuum levels at its upper and lower ends, to minimize vacuum leakage at the joint, the circumferential dimension of the transmission rod must be as small as possible. A smaller circumferential dimension results in a smaller area for vacuum leakage at the circumferential gap. ③ To achieve the smallest possible circumferential dimension for the transmission rod, one transmission rod can perform the function of two transmission rods. Since a single-turn beam extraction requires two phase selectors arranged radially, conventionally, one transmission rod should drive one phase selector. Two phase selectors would require two transmission rods, which would inevitably double the circumferential area. ④ The difficulty lies in using only one lever to control two phase drivers separately, and making the two phase drivers move independently without affecting each other.

[0055] 2. Solution of the present invention: ① Design of the transmission center, a. Transmission center 5-1 as follows Figure 6a2 As shown, the transmission hub is a cuboid with eight connecting rod hinges: specifically, the cuboid has four hinges on each of its upper and lower rows, distributed on both sides of the rectangle. The upper row of hinges is hinged to two connecting rods on one side of the upper row, for a total of four connecting rods; the lower row of hinges is hinged to two connecting rods on one side of the lower row, for a total of four connecting rods. The upper surface of the transmission hub has three circular holes, the middle one corresponding to the transmission rod 4-6. The transmission rod 4-6 transmits the upward, downward, and rotational power to the transmission hub 5-1 through this circular hole. The two sides have bushing lubrication holes to assist the movement of the middle transmission rod. b. Since the transmission hub is connected to the upper and lower rows of connecting rods through eight hinges, it is easy to imagine that when it receives the upward driving force of the transmission rod 4-6, the four long connecting rods at the top of the hinge extend outward, causing the four upper connecting rods to fit tightly against the "large cylinder," while the four lower connecting rods retract inward and disengage from the "small cylinder." Conversely, when it receives the downward driving force of transmission rod 4-6, the four connecting rods in the lower row of its hinges extend outward, causing the lower four connecting rods to fit tightly against the "small cylinder." At this time, the upper four connecting rods retract inward and disengage from the tight fit with the "large cylinder." ② Design of external rotary transmission component 5-2 and internal rotary transmission component 5-3: such as Figure 6a3As shown, the length of the outer rotary transmission component 5-2 is greater than the length of the inner rotary transmission component 5-3 because the outer rotary transmission component 5-2 needs to be in close contact with the "large cylinder" to achieve frictional transmission, while the inner rotary transmission component 5-3 needs to be in close contact with the "small cylinder" to achieve frictional transmission. The large cylinder is the outer rotary component 5-5, and the small cylinder is the inner rotary component 5-6. The inner diameter of the outer rotary component 5-5 is 120mm, and the inner diameter of the inner rotary component 5-6 is 104mm.

[0056] Based on the above-mentioned inventive principles, this invention designs a phase selector that switches working states without opening the cover.

[0057] A phase selector that switches operating states without opening the cover, such as Figure 1 , Figure 1a , Figure 1b , Figure 1c As shown, the phase selector, from top to bottom and from outside to inside, includes: a lifting device 1 and a magnetic shielding device 2 mounted above the accelerator cover; a drive device 4 mounted above and below the accelerator cover; a transmission mechanism 5 mounted below the accelerator cover; a phase selector 6; and an overall frame 3 that connects and supports the drive device 4 upwards and the transmission mechanism 5 downwards. Figure 2 As shown, the lifting device 1 moves the overall frame 3 upward away from the accelerator center plane by tightening or loosening the lifting bolts 1-1, or moves the overall frame 3 downward to the accelerator center plane, thereby switching the phase selector connected to the overall frame 3 to a non-working state or a working state. When the lifting device 1 moves downward and the phase selector is in the working state, the driving device 4 generates vertical driving force and rotational driving force in a time-sharing manner, and transmits the vertical driving force and rotational driving force to the transmission mechanism 5, which then drives multiple selectors 6 to move radially along the accelerator through the transmission mechanism 5.

[0058] Its features are:

[0059] The driving device 4 is as follows Figure 5a , 5b As shown, it includes a transmission rod 4-6, a vertical moving motor 4-1, and a rotary motor 4-3. When the vertical moving motor 4-1 is working, it drives the rotary motor 4-3 and the transmission rod (4-6) to move up and down, and ultimately drives the transmission hub to move up and down. When the rotary motor 4-3 is working, it drives the transmission rod 4-6 to rotate, and ultimately drives the transmission hub 5-1 to rotate.

[0060] like Figure 1 , Figure 5b , Figure 6a1As shown, the up-and-down moving motor 4-1 and the rotating motor 4-3 are arranged in the atmospheric environment above the accelerator cover plate. Part of the transmission rod 4-6 is arranged outside the vacuum to connect to the rotating motor 4-3; part of it is arranged inside the vacuum to connect to the transmission hub 5-1. The transmission rod 4-6 controls two phase drivers respectively through the transmission mechanism 5, so that the two phase drivers move independently and do not affect each other.

[0061] like Figure 6b As shown, the transmission mechanism 5 includes a transmission hub 5-1, which receives the upward and downward driving force and rotational force of the transmission rod 4-6 in a time-sharing manner. When the transmission hub 5-1 receives the upward driving force and rotational force of the transmission rod 4-6 in a time-sharing manner, the phase selector on the short rack moves radially. When the transmission hub (5-1) receives the downward driving force and rotational force of the transmission rod 4-6 in a time-sharing manner, the phase selector on the long rack moves radially.

[0062] Supplementary Note 1:

[0063] 1. The "working state" refers to the single-turn extraction state, while the "non-working state" refers to the non-single-turn extraction state, also known as the multi-turn extraction state. The multi-turn extraction state means the accelerator extracts a beam using a multi-turn extraction method, where multiple energy beams are superimposed at the extraction outlet. Conventional multi-turn extraction can reach up to 30 superimposed extractions. The single-turn extraction method involves using a phase selector slit to filter out unwanted energy beams, extracting only the beam with the required energy.

[0064] 2. Component Materials: Because the cyclotron is located in a high vacuum and strong magnetic environment, and the switching cost of the cyclotron is very high, the components used cannot be frequently replaced. Therefore, the materials used for the components must meet the characteristics of being non-magnetic and not easily deformed. Taking all factors into consideration, aluminum alloy is used as the main material for the components, and copper alloy is used as the secondary material.

[0065] Furthermore, such as Figure 5bAs shown, the driving device 4 includes a vertical moving motor 4-1, a vertical moving motor bracket 4-2, a rotary motor 4-3, a rotary motor bracket 4-4, a guide brass bolt 4-5, and a transmission rod 4-6. The vertical moving motor 4-1 drives the rotary motor 4-3, the rotary motor bracket 4-4, and the transmission rod 4-6 to move vertically, ultimately driving the transmission hub 5-1 to move vertically. The rotary motor 4-3 drives the transmission rod 4-6 to rotate, ultimately driving the transmission hub 5-1 to rotate. The guide brass bolt 4-5 is used for the rotary motor bracket 4-4 to ensure that the rotary motor 4-3 remains vertically moving when driven by the vertical moving motor 4-1. The transmission rod 4-6 transmits the driving force of the vertical moving motor 4-1 and the rotary motor 4-3, and transmits the driving force to the transmission hub 5-1.

[0066] Furthermore, the up-and-down moving motor 4-1 is a push rod motor, which is fixed on the up-and-down moving motor bracket 4-2, and the push rod motor shaft is connected to the rotary motor bracket 4-4; the up-and-down moving motor bracket 4-4 is fixedly connected to the magnetic shielding base by screws; the rotary motor 4-3 is fixed on the rotary motor bracket 4-4, and the rotary motor shaft is connected to the transmission rod 4-6; the rotary motor bracket 4-2 is suspended, and its two sides are slidably engaged with the guide grooves 4-7 on the sides of the up-and-down moving motor bracket 4-2 by guide brass bolts to restrict the rotation of the rotary motor bracket; the top of the transmission rod 4-6 is connected to the shaft of the rotary motor 4-3, and the bottom is connected to the transmission hub.

[0067] Furthermore, such as Figure 6a1 , Figure 6b As shown, the transmission mechanism includes a transmission hub 5-1, an external rotating transmission component 5-2, an internal rotating transmission component 5-3, a connecting rod 5-4, an external rotating component 5-5, an internal rotating component 5-6, a transmission gear set 5-7, a short rack 5-8, and a long rack 5-9. The transmission hub 5-1, external rotating transmission component 5-2, internal rotating transmission component 5-3, connecting rod 5-4, external rotating component 5-5, and internal rotating component 5-6 form a friction transmission mechanism. The transmission hub 5-1 is fixedly connected to the bottom end of the transmission rod 4-6 and rotates and rises and falls with the rotation and rise of the transmission rod 4-6.

[0068] Furthermore, such as Figure 6a2As shown, the transmission hub 5-1 is a cuboid with connecting rod hinges on both sides. The connecting rod hinges are arranged in two rows, with the upper row being long connecting rod hinges and the lower row being short connecting rod hinges. The upper row of hinges is symmetrically arranged in pairs on both sides of the cuboid and close to the upper surface of the cuboid, while the lower row of hinges is symmetrically arranged in pairs on both sides of the cuboid and close to the lower surface of the cuboid. The upper surface of the transmission hub 5-1 also has a transmission rod hole 5-1-3 in the middle position and bushing holes 5-1- on both sides of the middle position. 4. When the upper hinge ear 5-1-2 receives the driving force of the transmission rod 4-6 moving upward, the upper hinge ear 5-1-2 pushes the long connecting rod upward, causing the long connecting rod to extend outward and the short connecting rod to retract inward, thereby making the long connecting rod close to the external rotating part 5-5; when the lower hinge ear 5-1-1 receives the driving force of the transmission rod 4-6 moving downward, the lower hinge ear 5-1-1 pushes the short connecting rod downward, causing the long connecting rod to retract inward and the short connecting rod to extend outward, thereby making the short connecting rod close to the internal rotating part 5-6.

[0069] Furthermore, such as Figure 6a3 , 6b As shown, the diameter of the external rotating transmission component 5-2 is larger than the diameter of the internal rotating transmission component 5-3; the inner diameter of the external rotating component 5-5 is not limited to 120mm, and the inner diameter of the internal rotating component 5-6 is not limited to 104mm; the diameter of the transmission rod 4-6 is the minimum size that takes into account both the minimum vacuum leakage and the material strength, and this minimum size is not limited to 16mm.

[0070] Furthermore, when the transmission hub 5-1 receives the upward driving force from the transmission rod 4-6, the transmission hub 5-1 drives the external rotating transmission component 5-2 to extend outward through the connecting rod 5-4, and the external rotating transmission component 5-2 is tightly engaged with the external rotating component 5-5; then, when the transmission hub 5-1 receives the rotational force from the transmission rod 4-6, the rotation of the transmission hub 5-1 drives the external rotating transmission component 5-2 to make circular motion around the center of the transmission rod 4-6, indirectly controlling the rotation of the external rotating component; then the external rotating component 5-5, the external rotating transmission gear 5-7-1, and the short rack 5-8 form a gear transmission mechanism, the external rotating component 5-5 meshes with the external rotating transmission gear 5-7-1, driving the transmission gear to rotate, and the transmission gear meshes with the short rack 5-8, thereby driving the short rack 5-8 and the phase selector on the short rack to move back and forth along the radial direction of the accelerator.

[0071] Furthermore, when the transmission hub 5-1 receives the downward driving force of the transmission rod 4-6, the external rotating transmission component 5-2 retracts inward under the action of the connecting rod 5-4. At this time, the external rotating component 5-5 and the external rotating transmission component 5-2 are no longer in contact and no longer transmitting power. At this time, the internal rotating transmission component 5-3 is tightly in contact with the internal rotating component 5-6. Then, when the transmission hub 5-1 receives the rotational force of the transmission rod 4-6, the rotation of the transmission hub 5-1 drives the internal rotating transmission component 5-6 to make a circular motion around the center of the transmission rod, indirectly controlling the rotation of the internal rotating component 5-6. Then, the internal rotating component 5-6, the internal rotating transmission gear 5-7-2, and the long rack 5-9 form a gear transmission mechanism. The internal rotating component 5-6 meshes with the internal rotating transmission gear 5-7-2, driving the transmission gear to rotate. The transmission gear meshes with the long rack (5-9), thereby driving the long rack 5-9 and the phase selector on the long rack to move back and forth along the radial direction of the accelerator.

[0072] Furthermore, the overall frame 3 includes an upper sealing flange 3-1, a vertical sleeve 3-2, a reducing sleeve 3-3, a sleeve partition plate 3-4, a bottom sleeve 3-5, and a base plate 3-6. The upper sealing flange 3-1 is fixedly connected to the accelerator's upper cover plate. The vertical sleeve 3-2 is bush-fitted with the upper sealing flange 3-1 and uses an X-type sealing ring for vacuum sealing, and is also equipped with detachable screws for further fixation. The reducing sleeve 3-3 is fixedly connected to the vertical sleeve 3-2 at its small radius and to the sleeve partition plate 3-4 and the bottom sleeve 3-5 at its large radius. The sleeve partition plate 3-4 is placed between the reducing sleeve 3-3 and the bottom sleeve 3-5, with its center engaging with the external rotating component of the transmission device, providing axial constraint for the external rotating component. The bottom sleeve 3-5 is fixedly connected to the base plate 3-6 by three screws, thereby fixing the base plate 3-6 to a horizontal plane at a certain distance from the accelerator's central plane.

[0073] Furthermore, the lifting device 1 consists of a lifting bracket 1-2 and a lifting bolt 1-1. The bottom of the lifting bracket 1-2 is fixedly connected to the upper sealing flange by screws, wherein the upper sealing flange is fixed to the upper cover plate of the accelerator, and the lifting bolt 1-1 is connected to the threaded hole on the top of the outer shell of the magnetic shielding device through the through hole at the top of the lifting bracket 1-2.

[0074] Furthermore, the phase selector includes a phase selector mounting base 6-1 and a phase selector 6-2; wherein the phase selector mounting base 6-1 is fixedly mounted to the rack, and the phase selector 6-2 is fixed on the phase selector mounting base 6-1; the short rack 5-8 and the long rack 5-9 are at the same height and located on the same horizontal plane, and the rack closer to the center of the accelerator is the long rack, and the rack farther from the center of the accelerator is the short rack; each of the short rack 5-8 and the long rack 5-9 has an elongated mounting hole for mounting the phase selector, and the mounting position of the phase selector can be arbitrarily selected within the range of the elongated mounting hole; the brass bolt 3-7 passes through the elongated mounting hole and is fixedly connected to the phase selector mounting base 6-1.

[0075] Example 1: Switching between working and non-working states

[0076] This invention enables manual switching from operating to non-operating status when the accelerator is shut down but the cover is not opened. Opening the cover requires waiting for laboratory radiation to drop below a safe level, a process that takes two days. However, simply shutting down the accelerator without opening the cover only takes two hours, saving 46 hours. Since opening the cover is unnecessary, after two hours of shutdown, the switch between the two operating states can be completed simply by manually rotating the lifting bolt 1-1.

[0077] First, the initial installation. The first installation, also known as the initial installation, requires opening the accelerator cover. In the initial state, the lifting device is initially in its original position, with the lifting bolt 1-1 at the top. There is no lifting force on the magnetic shield and the overall frame 3. At this time, the phase selector is exactly in the center plane of the accelerator.

[0078] Secondly, when switching from the initial state to the non-single-turn lead-out working state, the machine is stopped for 2 hours, and the lifting bolts are manually tightened, which exerts an upward lifting force on the magnetic shield. Since the gap distance in the center plane of the accelerator is 34mm, and the phase selector is located in the upper part of the accelerator, theoretically, it only needs to be lifted by 17mm to completely move away from the center plane of the accelerator. Calculating the plate thickness and installation error, the overall frame is finally lifted by 20mm, and the phase selector enters the non-single-turn lead-out working state.

[0079] Third, when switching from a non-working state to a working state, there is no need to open the cover. After 2 hours of shutdown, manually place the lifting bolt 1-1 at the top. There is no lifting force on the magnetic shield and the overall frame 3. At this time, the phase selector is exactly in the center plane of the accelerator.

[0080] Example 2: Adjustment of the distance between the two racks

[0081] Adjusting the distance between the two racks is equivalent to adjusting the distance between the two phase selectors. Since the positions of the phase selectors and the racks are relatively fixed, adjusting the distance between the two phase selectors requires adjusting the distance between the two racks. The adjustment of the distance between the two racks is a non-stop, dynamic adjustment, which relies on a control system. This control system is a conventional control system, which is not the focus of this invention and will not be detailed here. Only the functions of the control system are described below:

[0082] During operation, the controller needs to adjust the rack position to get as close as possible to the result of the physical calculation. 1) When adjusting phase selector 1, which is closer to the accelerator center, the controller needs to adjust the up-and-down moving motor to move the rotary motor, transmission rod, and transmission hub downwards. This drives the connecting rod to make the internal rotating driven component tightly fit with the internal rotating component. Then, the rotary motor rotates, driving the transmission hub to rotate via the transmission rod, which in turn drives the internal rotating component to rotate. The internal rotating component then drives the long rack to move radially through the engagement of the internal rotary transmission gear and the rack and pinion mechanism, thereby adjusting the position of phase selector 1. 2) When adjusting phase selector 2, which is farther from the accelerator center, the controller needs to adjust the up-and-down moving motor to move the rotary motor, transmission rod, and transmission hub upwards. This drives the connecting rod to make the external rotating driven component tightly fit with the external rotating component. Then, the rotary motor rotates, driving the transmission hub to rotate via the transmission rod, which in turn drives the external rotating component to rotate. The external rotating component then drives the short rack to move radially through the engagement of the external rotary transmission gear and the rack and pinion mechanism, thereby adjusting the position of phase selector 2. The position between the two phase selectors can be adjusted by adjusting the position between the two racks respectively.

[0083] Example 3: Steps for replacing the rack

[0084] When the length of the rack no longer meets the new physical requirements, the rack can be replaced. First, the accelerator needs to be shut down and the vacuum removed. While waiting for laboratory radiation to drop below a safe level, the accelerator cover should be opened to expose the overall frame of the phase selector. Then, the guide brass bolts on the base plate should be removed. During removal, the racks of both lengths must be held steady to avoid damage. Once the guide brass bolts are removed, the racks of both lengths can be taken off, and the new rack can be installed.

[0085] The "no-cover switching of operating states" referred to in this invention means that, with the lengths of the long and short racks fixed, and the distances between the phase selectors on the long racks and the phase selectors on the short racks relatively fixed, switching from an operating state to a non-operating state, or from a non-operating state to an operating state other than the initial state, is considered "no-cover switching of operating states." If the length of the racks themselves is changed, the cover must be opened. Alternatively, if the distance between the racks and the corresponding phase selectors needs to be adjusted, the machine must be stopped and the cover opened.

[0086] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention is also intended to include these modifications and variations.

Claims

1. A phase selector for switching operating states without opening the cover, the phase selector comprising, from top to bottom and from outside to inside: A lifting device (1) and a magnetic shielding device (2) are installed above the accelerator cover. The drive unit (4) is arranged above and below the accelerator cover, the transmission mechanism (5) is arranged below the accelerator cover, the phase selector (6) is arranged, and the overall frame (3) is connected and supported upward to the drive unit (4) and connected and supported downward to the transmission mechanism (5); the lifting device (1) moves the overall frame (3) upward away from the accelerator center plane by tightening or loosening the lifting bolts (1-1), or moves the overall frame (3) downward to the accelerator center plane, thereby switching the phase selector connected to the overall frame (3) to a non-working state or a working state. When the lifting device (1) moves downward and the phase selector is in a working state, the drive unit (4) generates vertical driving force and rotational driving force in time-sharing and transmits the vertical driving force and rotational driving force to the transmission mechanism (5), and then the transmission mechanism (5) finally drives multiple phase selectors (6) to move radially along the accelerator; Its features are: The drive device (4) includes a transmission rod (4-6), a vertical moving motor (4-1), and a rotary motor (4-3). When the vertical moving motor (4-1) is working, it drives the rotary motor (4-3) and the transmission rod (4-6) to move up and down, and ultimately drives the transmission hub to move up and down. When the rotary motor (4-3) is working, it drives the transmission rod (4-6) to rotate, and ultimately drives the transmission hub (5-1) to rotate. The up-and-down moving motor (4-1) and the rotating motor (4-3) are installed in the atmospheric environment above the accelerator cover. Part of the transmission rod (4-6) is installed outside the vacuum to connect to the rotating motor (4-3); part of it is installed inside the vacuum to connect to the transmission hub (5-1). The transmission rod (4-6) controls two phase drivers through the transmission mechanism (5) so that the two phase drivers move independently and do not affect each other. The transmission mechanism (5) includes a transmission hub (5-1), which receives the upward and downward driving forces and rotational forces of the transmission rod (4-6) in a time-sharing manner. When the transmission hub (5-1) receives the upward driving force and rotational force of the transmission rod (4-6) in a time-sharing manner, the phase selector on the short rack moves radially. When the transmission hub (5-1) receives the downward driving force and rotational force of the transmission rod (4-6) in a time-sharing manner, the phase selector on the long rack moves radially. The transmission mechanism includes a transmission hub (5-1), an external rotating transmission component (5-2), an internal rotating transmission component (5-3), a connecting rod (5-4), an external rotating component (5-5), an internal rotating component (5-6), a transmission gear set (5-7), a short rack (5-8), and a long rack (5-9). The transmission hub (5-1), external rotating transmission component (5-2), internal rotating transmission component (5-3), connecting rod (5-4), external rotating component (5-5), and internal rotating component (5-6) form a friction transmission mechanism. The transmission hub (5-1) is fixedly connected to the bottom end of the transmission rod (4-6) and rotates and rises and falls with the rotation and rise and fall of the transmission rod (4-6). The transmission hub (5-1) is a cuboid with connecting rod hinges on both sides. The connecting rod hinges are arranged in two rows: the upper row consists of long connecting rod hinges, and the lower row consists of short connecting rod hinges. The upper row of hinges is symmetrically arranged in pairs on both sides of the cuboid, close to the upper surface; the lower row of hinges is symmetrically arranged in pairs on both sides of the cuboid, close to the lower surface. The upper surface of the transmission hub (5-1) also has a transmission rod hole (5-1-3) in the middle position, and a... The bushing holes (5-1-4) on both sides of the position; when the upper row of hinge ears (5-1-2) receives the driving force of the transmission rod (4-6) moving upward, the upper row of hinge ears (5-1-2) pushes the long connecting rod upward, so that the long connecting rod extends outward and the short connecting rod retracts inward; when the lower row of hinge ears (5-1-1) receives the driving force of the transmission rod (4-6) moving downward, the lower row of hinge ears (5-1-1) pushes the short connecting rod downward, so that the long connecting rod retracts inward and the short connecting rod extends outward; The diameter of the external rotating transmission component (5-2) is larger than that of the internal rotating transmission component (5-3); the inner diameter of the external rotating component (5-5) is 120mm and the inner diameter of the internal rotating component (5-6) is 104mm; the diameter of the transmission rod (4-6) is the minimum size that takes into account both the minimum vacuum leakage and the material strength, and this minimum size is 16mm. When the transmission hub (5-1) receives the upward driving force from the transmission rod (4-6), the transmission hub (5-1) drives the external rotating transmission component (5-2) to extend outward through the connecting rod (5-4), and the external rotating transmission component (5-2) fits tightly with the external rotating component (5-5); then, when the transmission hub (5-1) receives the rotational force from the transmission rod (4-6), the rotation of the transmission hub (5-1) drives the external rotating transmission component (5-2) to make a circle with the center of the transmission rod (4-6) as the center. The cycloidal motion indirectly controls the rotation of the external rotating component; then the external rotating component (5-5), the external rotating transmission gear (5-7-1), and the short rack (5-8) form a gear transmission mechanism. The external rotating component (5-5) meshes with the external rotating transmission gear (5-7-1), driving the transmission gear to rotate. The transmission gear then meshes with the short rack (5-8), thereby driving the short rack (5-8) and the phase selector on the short rack to reciprocate along the radial direction of the accelerator; when the transmission center (5-1) receives the transmission... When the rod (4-6) exerts a downward driving force, the outer rotary transmission component (5-2) retracts inward under the action of the connecting rod (5-4). At this time, the outer rotary component (5-5) and the outer rotary transmission component (5-2) are no longer in contact and no longer transmitting power. At this time, the inner rotary transmission component (5-3) is tightly in contact with the inner rotary component (5-6). Then, when the transmission hub (5-1) receives the rotational force of the transmission rod (4-6), the rotation of the transmission hub (5-1) drives the inner rotary transmission component (5-3) to transmit power. The moving rod moves in a circle with its center as the center, indirectly controlling the rotation of the internal rotating part (5-6). Then, the internal rotating part (5-6), the internal rotating transmission gear (5-7-2), and the long rack (5-9) form a gear transmission mechanism. The internal rotating part (5-6) meshes with the internal rotating transmission gear (5-7-2), driving the transmission gear to rotate. The transmission gear then meshes with the long rack (5-9), thereby driving the long rack (5-9) and the phase selector on the long rack to move back and forth along the radial direction of the accelerator.

2. The phase selector for switching operating states without opening the cover according to claim 1, characterized in that: The driving device (4) includes a vertical moving motor (4-1), a vertical moving motor bracket (4-2), a rotary motor (4-3), a rotary motor bracket (4-4), a guide brass bolt (4-5), and a transmission rod (4-6). The vertical moving motor (4-1) drives the rotary motor (4-3), the rotary motor bracket (4-4), and the transmission rod (4-6) to move up and down, ultimately driving the transmission hub (5-1) to move up and down. The rotary motor (4-3) drives the transmission rod (4-6) to rotate, ultimately driving the transmission hub (5-1) to rotate. The guide brass bolt (4-5) is used for the rotary motor bracket (4-4) to ensure that the rotary motor (4-3) remains vertical when driven by the vertical moving motor (4-1). The transmission rod (4-6) transmits the driving force of the vertical moving motor (4-1) and the rotary motor (4-3), and transmits the driving force to the transmission hub (5-1).

3. The phase selector for switching operating states without opening the cover according to claim 2, characterized in that: The up-and-down moving motor (4-1) is a push rod motor, which is fixed on the up-and-down moving motor bracket (4-2). The push rod motor shaft is connected to the rotary motor bracket (4-4). The up-and-down moving motor bracket (4-2) is fixedly connected to the magnetic shielding base by screws. The rotary motor (4-3) is fixed on the rotary motor bracket (4-4). The rotary motor shaft is connected to the transmission rod (4-6). The rotary motor bracket (4-4) is suspended. Both sides are slidably engaged with the guide grooves (4-7) on the side of the up-and-down moving motor bracket (4-2) by guide brass bolts to limit the rotation of the rotary motor bracket. The top of the transmission rod (4-6) is connected to the shaft of the rotary motor (4-3), and the bottom is connected to the transmission hub.

4. The phase selector for switching operating states without opening the cover according to claim 1, characterized in that: The overall frame (3) includes an upper sealing flange (3-1), a vertical sleeve (3-2), a reducing sleeve (3-3), a sleeve partition plate (3-4), a bottom sleeve (3-5), and a base plate (3-6); wherein the upper sealing flange (3-1) is fixedly connected to the accelerator upper cover plate, the vertical sleeve (3-2) is bush-fitted with the upper sealing flange (3-1), and is assisted by an X-type sealing ring for vacuum sealing, and is also equipped with detachable screws for auxiliary fixing; the reducing sleeve (3-3) is connected to the vertical sleeve at its small radius. The straight sleeve (3-2) is fixedly connected, and the large radius is connected to the sleeve partition plate (3-4) and the bottom sleeve (3-5); the sleeve partition plate (3-4) is placed between the variable diameter sleeve (3-3) and the bottom sleeve (3-5), and its center is engaged with the external rotating part of the transmission device to provide axial restriction for the external rotating part; the bottom sleeve (3-5) is fixedly connected to the base plate (3-6) by three screws, thereby fixing the base plate (3-6) on a horizontal plane at a certain distance from the center plane of the accelerator.

5. A phase selector for switching operating states without opening the cover according to claim 1, characterized in that: The lifting device (1) consists of a lifting bracket (1-2) and a lifting bolt (1-1). The bottom of the lifting bracket (1-2) is fixedly connected to the upper sealing flange by screws. The upper sealing flange is fixed on the upper cover plate of the accelerator. The lifting bolt (1-1) is connected to the threaded hole on the top of the outer shell of the magnetic shielding device through the through hole on the top of the lifting bracket (1-2).

6. A phase selector for switching operating states without opening the cover according to claim 1, characterized in that: The phase selector includes a phase selector mounting base (6-1) and a phase selector plate (6-2); wherein the phase selector mounting base (6-1) is fixed together with the rack, and the phase selector plate (6-2) is fixed on the phase selector mounting base (6-1); the short rack (5-8) and the long rack (5-9) are at the same height and are located on the same horizontal plane, and the rack closer to the center of the accelerator is the long rack, and the rack farther from the center of the accelerator is the short rack; each of the short rack (5-8) and the long rack (5-9) has an elongated mounting hole for mounting the phase selector, and the mounting position of the phase selector can be arbitrarily selected within the range of the elongated mounting hole; a brass bolt (3-7) passes through the elongated mounting hole and is fixed to the phase selector mounting base (6-1).

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