CN113966065B - Automatic target changing device and method used in vacuum of cyclotron - Google Patents

Abstract

The invention discloses an automatic target changing device and method for a vacuum chamber of a cyclotron, wherein the device comprises: the target disc main body, the target removing structure, the target rod, the target sheet and the corresponding control mechanism are arranged in the vacuum chamber of the cyclotron; the target disc main body is a rotatable target disc main body, and target disc target bins for storing target sheets are uniformly distributed on the side end face of the rotatable target disc main body; the control mechanism controls the target disc main body, the target rod and the target removing mechanism to cooperate to complete automatic target loading and automatic target removing; the method comprises the following steps: when the target is loaded, the target disc main body and the target rod respectively rotate to the stations which are matched with each other when the target is loaded, so that the target loading process is completed; when the target is removed, the target disc main body and the target rod respectively rotate to the stations matched with each other when the target is removed, so that the target removing process is completed. According to the invention, only one kinematic pair is needed to be added, namely the target disk rotates, and then the target rod, the target removing device and the control system are matched, so that the online target changing of the stripped target can be realized, the complexity of the device is low, and the device is easy to realize.

Description

A device and method for automatic target changing in a cyclotron vacuum

technical field

The invention relates to the technical field of cyclotron stripping targets, in particular to an automatic target changing device and method used in a cyclotron vacuum.

Background technique

In the cyclotron, the accelerated particles can be extracted by stripping. After the particles are accelerated to a specified energy, they pass through the stripping film at the specified position, stripped off a certain charge, and converted into particles with an anti-potential to the original particle. The particle beam will follow the The extraction track is drawn out, so whether the stripping film can maintain normal working conditions at the stripping point is the key to whether the extraction beam can be stripped, and it is also one of the key points for the accelerator to achieve design and performance. Since the peeling film will generate a certain amount of energy deposition when the charge is peeled off, which will cause damage to the peeling film, the peeling film is prone to damage after working for a period of time, and the peeling film needs to be replaced.

The method of replacing the peeling film in the prior art is as follows: once the peeling film is found to be broken, the machine can only be stopped, the vacuum is released, the vacuum is opened again, the peeling target is taken out, the broken peeling film on the peeling target is removed, and a new one is replaced. . The biggest problem with this method is: if the cyclotron is shut down because the peeling film is broken when the cyclotron is working, the radiation dose is very large, and it is impossible to replace it manually at that time. .

In order to solve the problem of automatically replacing the peeling film, patent number: 201810726365.0, patent name: a rotary target changing mechanism used in a cyclotron, the problem with this solution is that it only records a rotatable disk for storing target pieces structure, the problem it solves is as described in it: "The precise positioning scheme for the peeling-out rotary target-changing mechanism of the cyclotron provided by the present invention greatly improves the positioning accuracy compared with the traditional positioning method", it can be seen that, What it solves is only the positioning accuracy of the target disc itself, not the complete structure of a set of target changing process. The target changing process includes "target loading" and "target removal", and the two processes together are a complete process. For example, firstly, the patent does not describe the structure of peeling off the target, but only describes the mechanism of the target disc, but without the structure of peeling off the target, the process of "target loading" cannot be realized; secondly, the patent does not describe "target removal" Structure. There are more than 10 spare targets to be replaced on the rotatable disc structure. The current peeling film is broken. Only by removing the bad peeling film on the current peeling target can a new peeling film be replaced. There is absolutely no mention of "off-target" structures in the protocol. Therefore, this patent is only a structure for preserving the target piece and the precise positioning of the target disc itself, rather than a target-changing structure. Patent number: 201810682653.0, patent name: accelerator stripping target motion control system and its control method, the problems in this scheme are: first, it only records the electrical structure of the turntable or stripping target but not the mechanical structure, for example, only records How the driving device of the peeling target drives the motor to drive the peeling target, but does not record the special structure when the conventional peeling target is used to realize automatic target change, that is, it does not record what the structure of the target head of the peeling target is. The remaining target pieces on the plate are extracted and mounted on the target head. Second, only the control of loading the target is recorded, but the control process of removing the target is not recorded. When a damaged target piece remains on the target head of a stripped target, only the damaged target piece on the current target head can be "taken down" ”, the new target can be loaded. Since the entire target changing process is fully automatic, when the control system lacks the control of the “target removal” process, it will affect the next “target loading” process. Therefore, the target removal process The control of the target and the control of the target loading process are interdependent and complementary. Therefore, the "target motion control system for peeling off an accelerator and its control method" cannot solve the problem of automatic target changing in the vacuum of the cyclotron.

To sum up, the first patent (patent number: 201810726365.0, patent name: a rotary target changing mechanism used in a cyclotron) lacks the description of the stripping target structure and the target removal structure, but only describes the target storage device. The structure of the rotatable target plate is not a complete automatic target changing structure due to three missing two; the second patent (patent number: 201810682653.0, patent name: accelerator peeling target motion control system and control method) The system and control method only record the electrical structure, but not the mechanical structure, and the mechanical structure plus the electrical structure can be used to complete the automatic target change, and the mechanical structure that is missing in the second patent, such as the structure of peeling the target and the structure of removing the target There is no record in the first patent. Therefore, neither of the two patents in the prior art can solve the problem of automatic target changing.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the prior art, the present invention proposes an automatic target changing device and method for use in a cyclotron vacuum, with the purpose of solving the problem that the prior art does not have a complete mechanical structure, control system and control method for automatic target changing. question.

The present invention adopts the following technical solutions for solving its technical problems:

An automatic target changing device used in a cyclotron vacuum, as shown in Figures 1-1, 1-2, 1-3, 2-1, 2-2, is characterized in that: the automatic target changing device includes: The target disc body 1-1 in the vacuum of the cyclotron, the target removal structure 1-3 arranged on the target disc body, and the target disc opening 1-5 for extending into the cyclotron along the target disc body for stripping charges A telescopic target rod 2, a target piece 3 installed on the head of the target rod 2, and a corresponding control mechanism; the target disk main body 1-1 is a rotatable target disk main body 1-1, and the rotatable target The side end surface of the main body 1-1 is evenly provided with a target disc and target bin 1-2 for storing the target pieces 3; the control mechanism controls the target disc main body 1-1, the target rod 2, and the target removing mechanism 1-3. Cooperate and make relative motions to complete automatic target loading and automatic target removal, thereby realizing automatic target changing.

The target rod 2 is provided with a clamping device 2-1 for the head of the target rod 2 and a target rod rod part 2-2; the target rod head clamping device 2-1 includes an adjustment nut 2-1-1, Fork head 2-1-2; side guard 2-1-3, top piece 2-1-4, spring 2-1-5, top ball 2-1-6; the adjusting nut 2-1-1 is used for adjustment The pressure of the spring 2-1-5 on the top ball 2-1-6, the fork 2-1-2 is used to clamp the upper and lower sides of the tail of the target piece 3, and the side guard 2-1-3 is used to clamp The left and right sides of the tail of the target piece 3; the installation angle of the adjusting nut 2-1-1 is parallel to the opening direction of the target removal structure 1-3, and is installed on the same side of the target head 2 as the opening direction of the target removal structure 1-3 position.

The target piece 3 is provided with a target frame 3-1, a peeling film 3-2, a positioning hole 3-3, and a target piece tail 3-4. The positioning hole 3-3 is arranged at the tail of the target piece. The positioning hole 3 The shape and size of -3 are matched with the top ball 2-1-6 of the target rod. When the tail of the target piece 3 is inserted into the fork head 2-1-2 and the side guard 2-1-3 of the target rod, the top ball 2 of the target rod -1-6 is pressed into the positioning hole 3-3 of the target piece under the pressure of the spring, so as to complete the positioning of the target piece to the target rod.

The target plate and target chamber 1-2 is provided with an adjustment nut 1-2-1, a spring 1-2-2; a top block 1-2-3, a top ball 1-2-4; the adjustment nut 1-2-1 is outside the There are external threads on the circumferential surface, which can be screwed into the threaded holes corresponding to the main body 1-1 of the target disc. 3, so that the target piece 3 is gently pressed in the target compartment of the target disc, so as to prevent the target piece 3 from shaking in the target compartment 1-2 when the target disc rotates.

The target removing mechanism 1-3 is arranged on one side of the target disc opening 1-5, the target removing mechanism 1-3 is provided with a semicircular opening, and the direction of the semicircular opening is the same as that of the target disc main body 1-5 when the target is removed. 1. The rotation direction is the same, and the size of the semicircular opening matches the size of the target rod head clamping mechanism 2-1.

An automatic target changing method in a cyclotron vacuum is characterized in that: the automatic target changing method comprises the following steps:

Step 1: When loading the target, the control mechanism controls the main body 1-1 of the target disc and the target rod 2 to rotate to the position where they cooperate with each other when loading the target, so as to complete the target loading process;

Step 2: When the target is removed, the control mechanism controls the main body 1 of the target disc and the target rod 2 to rotate to the position where they cooperate with each other when the target is removed, thereby completing the target removal process.

The target loading process of the step 1 is as follows:

1) The control mechanism controls the main body 1-1 of the target disc to rotate along the position of the shaft hole 1-4 of the target disc, so that the position of the main body 1-1 of the target disc and the target chamber 1-2 of the current target disc faces the clamping of the front end of the target rod. The opening of the mechanism 2-1;

2) The control mechanism controls the target rod 2 to move toward the main body 1-1 of the target disc, so that the clamping mechanism 2-1 at the front end of the target rod 2 withstands and locks the target handle at the tail of the target piece on the target chamber 1-2 of the current target disc;

3) The control mechanism controls the target rod 2 to move back, drives the target handle at the tail of the current target piece 3, and takes out the target piece 3 corresponding to the handle, thereby realizing the installation of the target piece 3 on the target rod 1, and completing the target loading the process of.

The de-targeting process of the step 2 is as follows:

1) The control mechanism controls the rotation of the target disc main body 1-1, so that the target removal structure 1-3 on the target disc main body 1-1 enters the target removal station;

2) The control mechanism moves the target rod 2 equipped with the target piece 3 to the target removal preparation position;

3) The control mechanism controls the target-removing mechanism 1-3 to continue to rotate from the target-removing station to a position where the front end clamping mechanism 2-1 of the target rod can be locked;

4) The control mechanism controls the target rod 2 to move backward, and the target removal structure 1-3 clamps the target piece 3 out of the target rod head clamping mechanism 2-1.

Advantages and Effects of the Invention

The technical solution provided by the present invention only needs to add one moving pair, that is, the target disk rotates, and then is equipped with a target rod, a target removing device, and a control system to realize the online target replacement of the peeled target, and the complexity of the equipment is low. Easy to implement. The whole process of target changing is fully automatic in vacuum. Since there are many target plates on the target plate, which is enough to maintain the number of replacements throughout the year, new target plates can be replaced on the target plate at one time during equipment maintenance at the end of the year, without the need to stop for a few days and replace the target plate due to damage to the target plate. The target can only be replaced after the radiation has dissipated, which seriously affects the use of the equipment.

Description of drawings

Figure 1-1 Outline drawing of target disk;

Figure 1-2 Structural diagram of target disk and target bin;

Figure 1-3 target structure diagram;

Figure 2-1 Outline drawing of target rod;

Figure 2-2 The outline of the structure of the target head;

Figure 2-3 Sectional view of the structure of the target head;

Fig. 3 is the target changing process of the present invention-initial outline drawing;

In the figure, both the target rod and the target disc are in the initial position;

Fig. 4 is the target changing process of the present invention - aligning the target piece;

Fig. 5 is the target changing process of the present invention-pressing the target disk;

Fig. 6 is the target changing process of the present invention - pulling out the target piece;

Fig. 7 is the automatic target changing device of the present invention - turn to working position;

Fig. 8 is the automatic target changing device of the present invention - reaching the working position;

Fig. 9 is the process of going to target of the present invention - reaching the position of going to target;

Fig. 10 is the process of de-targeting of the present invention - preparing to de-target;

Fig. 11 is the target removal process of the present invention - removing the target piece;

In the figure, 1: target plate; 2: target rod; 3: target piece;

1-1: main body of target plate; 1-2: target plate and target compartment; 1-2-1: adjusting nut; 1-2-2: spring; 1-2-3: top block; 1-2-4: top ball ; 1-2-5: strip-shaped target groove; 1-3: target removal structure; 1-4: target disk shaft hole; 1-5: target disk opening;

2-1: Target rod head clamping mechanism; 2-2: Target rod rod; 2-1-1: Adjusting nut 2-1-2: Fork head; 2-1-3: Side guard; 2-1 -4: Top sheet; 2-1-5: Spring; 2-1-6: Top bead;

3: target piece; 3-1: target frame; 3-2: peeling film; 3-3: positioning hole; 3-4: target piece tail;

Detailed ways

Design principle of the present invention

Design difficulty of the present invention: The design difficulty of the present invention lies in adopting the simplest and most delicate method to realize automatic target changing, which is different from the conventional automatic method. There are many ways to change the target, and many methods can achieve automatic target change, but they are not necessarily the simplest or the most sophisticated. The present invention fully embodies the simple, ingenious and practical design ideas in two aspects:

First, the ingenious design of the target taking process:

In the process of taking the target, the pressure of the target head spring 2-1-5 on the top ball 2-1-6 is greater than the pressure of the target chamber spring 1-2-2 on the top ball 1-2-4, so that the target rod 2 is removed from the target plate target. The target piece 3 can only be taken out when the target piece 3 is taken out from the warehouse 1-2. Otherwise, when the target rod 2 clamps the target piece 3 and moves backward, the frictional force of the top ball of the target rod 2 on the target piece 3 is smaller than that of the target. Due to the frictional force of the disk target chamber on the top beads 1-2-4, the target piece 3 will fall off from the target head 2. The design structure of this embodiment is reflected in that there is a concave positioning hole at the tail of the target piece 3, and the top ball 2-1-6 is pressed into the positioning hole, which increases the friction force, while the target plate, the target chamber 1-2 and the top ball 1-2 are pressed into the positioning hole. -4 is in contact with the plane of the target frame 3-1 of the target piece 3, and the pressure of the top ball 1-2-4 on the plane of the target frame 3-1 can gently press the target piece 3 into the target chamber of the target plate to avoid The target piece 3 shakes in the target chamber 1-2 when the target disc rotates. Since the former top ball contacts the concave positioning hole, the latter top ball contacts the plane, so that the pressure of the target head spring 2-1-5 on the top ball 2-1-6 is greater than that of the target chamber spring 1-2-2 For the top bead 1-2-4 pressure.

Second, the exquisite design of the installation angle of the target-removing structure 1-3: the position of the target-removing structure 1-3 is fixed once it is installed, and the target rod 2 can only perform linear telescopic motion from the beginning to the end and cannot be used as a target rod During the target removal process, only relying on the rotation angle of the target plate cannot guarantee that the target removal structure 1-3 with a fixed angular position will clamp the target head clamping mechanism 2-1 with a fixed angular position when it reaches the predetermined station. , it is also necessary to match the installation angle of the target removal structure 1-3 with the rotation angle of the target disk 1-1, specifically: when the target removal structure 1-3 is not in working state, it is on the side of the target disk opening 1-5. The installation angle should try not to occupy the space of the target plate opening 1-5, but can not completely avoid the space of the target plate opening 1-5, and the installation angle of the target plate opening 1-5 should meet: when the target plate opening 1-3 When reaching the predetermined station of "target removal", the contact area between its opening and the clamping mechanism 2-1 is the largest area, that is, when the target removal mechanism 1-3 reaches the station of the target head clamping mechanism, its opening direction is the same as that of the clamping mechanism 2-1. parallel to the ground.

Third, the debugging method is simple. The force on the top ball 2-1-6 on the head of the target rod and the top ball 1-2-4 on the target chamber must be precisely matched to ensure that the target rod can take out the target piece from the target chamber. However, the method of debugging these two forces is very simple: the design structure is: the adjusting nut 2-1-1 for adjusting the force and Adjusting nut 1-2-1 can be pre-adjusted in the atmospheric environment during adjustment, and the adjustment method is also very simple.

Based on the above inventive principles, the present invention designs an automatic target changing device used in a cyclotron vacuum.

An automatic target changing device used in a cyclotron vacuum, as shown in Figures 1-1, 1-2, 1-3, 2-1, 2-2, is characterized in that: the automatic target changing device includes: The target disc body 1-1 in the vacuum of the cyclotron, the target removal structure 1-3 arranged on the target disc body, and the target disc opening 1-5 for extending into the cyclotron along the target disc body for stripping charges A telescopic target rod 2, a target piece 3 installed on the head of the target rod 2, and a corresponding control mechanism; the target disk main body 1-1 is a rotatable target disk main body 1-1, and the rotatable target The side end surface of the main body 1-1 is evenly provided with a target disc and target bin 1-2 for storing the target pieces 3; the control mechanism controls the target disc main body 1-1, the target rod 2, and the target removing mechanism 1-3. Cooperate and make relative motions to complete automatic target loading and automatic target removal, thereby realizing automatic target changing.

Additional instructions:

The control mechanism of the present invention includes a drive device, a collection device, and a control device. The contents of these three parts are the same as those of the patent number: 201810682653.0 and the patent name: the motion control system of the accelerator stripping target and its control method, and will not be repeated here.

The target rod 2 is provided with a clamping device 2-1 for the head of the target rod 2 and a target rod rod part 2-2; the target rod head clamping device 2-1 includes an adjustment nut 2-1-1, Fork head 2-1-2; side guard 2-1-3, top piece 2-1-4, spring 2-1-5, top ball 2-1-6; the adjusting nut 2-1-1 is used for adjustment The pressure of the spring 2-1-5 on the top ball 2-1-6, the fork 2-1-2 is used to clamp the upper and lower sides of the tail of the target piece 3, and the side guard 2-1-3 is used to clamp The left and right sides of the tail of the target piece 3; the installation angle of the adjusting nut 2-1-1 is parallel to the opening direction of the target removal structure 1-3, and is installed on the same side of the target head 2 as the opening direction of the target removal structure 1-3 position.

The target piece 3 is provided with a target frame 3-1, a peeling film 3-2, a positioning hole 3-3, and a target piece tail 3-4. The positioning hole 3-3 is arranged at the tail of the target piece. The positioning hole 3 The shape and size of -3 are matched with the top ball 2-1-6 of the target rod. When the tail of the target piece 3 is inserted into the fork head 2-1-2 and the side guard 2-1-3 of the target rod, the top ball 2 of the target rod -1-6 is pressed into the positioning hole 3-3 of the target piece under the pressure of the spring, so as to complete the positioning of the target piece to the target rod.

Additional instructions:

In Fig. 1-3, the target frame 3-1 and the peeling film 3-2 are assembled together in advance to form a target sheet, as a whole; during installation, they are installed together at the front end of the target tray or target rod. 3-2 Damaged, after replacement, discard together.

The target plate and target chamber 1-2 is provided with an adjustment nut 1-2-1, a spring 1-2-2; a top block 1-2-3, a top ball 1-2-4; the adjustment nut 1-2-1 is outside the There are external threads on the circumferential surface, which can be screwed into the threaded holes corresponding to the main body 1-1 of the target disc. 3, so that the target piece 3 is gently pressed in the target compartment of the target disc, so as to prevent the target piece 3 from shaking in the target compartment 1-2 when the target disc rotates.

The target removing mechanism 1-3 is arranged on one side of the target disc opening 1-5, the target removing mechanism 1-3 is provided with a semicircular opening, and the direction of the semicircular opening is the same as that of the target disc main body 1-5 when the target is removed. 1. The rotation direction is the same, and the size of the semicircular opening matches the size of the target rod head clamping mechanism 2-1.

An automatic target changing method in a cyclotron vacuum, as shown in Figure 3-Figure 11, is characterized by:

The moving target method includes the following steps:

Step 1: When loading the target, the control mechanism controls the main body 1-1 of the target disc and the target rod 2 to rotate to the position where they cooperate with each other when loading the target, so as to complete the target loading process;

Step 2: When the target is removed, the control mechanism controls the main body 1 of the target disc and the target rod 2 to rotate to the position where they cooperate with each other when the target is removed, thereby completing the target removal process.

The target loading process of the step 1 is as follows:

1) The control mechanism controls the main body 1-1 of the target disc to rotate along the position of the shaft hole 1-4 of the target disc, so that the position of the main body 1-1 of the target disc and the target chamber 1-2 of the current target disc faces the clamping of the front end of the target rod. The opening of the mechanism 2-1;

2) The control mechanism controls the target rod 2 to move toward the main body 1-1 of the target disc, so that the clamping mechanism 2-1 at the front end of the target rod 2 withstands and locks the target handle at the tail of the target piece on the target chamber 1-2 of the current target disc;

3) The control mechanism controls the target rod 2 to move back, drives the target handle at the tail of the current target piece 3, and takes out the target piece 3 corresponding to the handle, thereby realizing the installation of the target piece 3 on the target rod 1, and completing the target loading the process of.

The de-targeting process of the step 2 is as follows:

1) The control mechanism controls the rotation of the target disc main body 1-1, so that the target removal structure 1-3 on the target disc main body 1-1 enters the target removal station;

2) The control mechanism moves the target rod 2 equipped with the target piece 3 to the target removal preparation position;

3) The control mechanism controls the target-removing mechanism 1-3 to continue to rotate from the target-removing station to a position where the front end clamping mechanism 2-1 of the target rod can be locked;

4) The control mechanism controls the target rod 2 to move backward, and the target removal structure 1-3 clamps the target piece 3 out of the target rod head clamping mechanism 2-1.

Additional instructions:

After the waste target piece is removed from the target rod 2, it directly falls into the metal target piece waste tube directly below when the target piece 1-3 in the vacuum is stuck out. Tablets are thrown away at one time.

Example 1

As shown in Figure 1-1, the target plate 1 can be rotated around the target plate shaft hole 1-4 as a whole, and there are multiple target plate and target chambers 1-2 (there are 12 in the figure, but not limited to 12), which can be pre- The target piece 3 is loaded into the target tray and target chamber 1-2.

As shown in Figures 2-1, 2-2 and 2-3, the front end of the target rod 2 is the target head 2-1, which can hold the target piece 3.

Before loading the target, the initial position of each component is shown in Figure 3, and the target rod 2 is aligned with the target plate opening 1-5 of the target plate 1; at this time, the target plate 1 rotates around the position of the target plate shaft hole 1-4, as shown in the following figure: As shown in FIG. 4 , align the target plate and target chamber 1-2 with the target plate 3 and the target rod head clamping mechanism 2-1 of the target rod 2; the target rod 2 moves to the target disk 1, as shown in Figure 5 As shown, the target plate 1 is held up, and the tail of the target piece 3 is inserted into the target rod head clamping mechanism 2-1, then the target rod head clamping mechanism 2-1 will clamp the tail of the target piece 3; The target rod 2 moves in the opposite direction in a straight line and leaves the target plate 1. As shown in Figure 6, the target rod 2 will pull out the target piece 3 from the target plate and target chamber 1-2, and install it on the front end of the target rod 2 to complete the target loading. Actions.

When the target rod is working, the target disk 1 rotates around the position of the target disk shaft hole 1-4. As shown in Figure 7, the target disk opening 1-5 of the target disk 1 is aligned with the target rod 2 position; the target rod 2 can move forward Movement, over the target plate 1, as shown in Figure 8, into the working position.

Before removing the target, when the target piece 3 at the front end of the target rod 2 needs to be replaced, the target rod 2 moves to the position shown in Figure 9, so that the target removal structure 1-3 is aligned with the target piece 3 and the target rod at the front end of the target rod is clamped. The notch position of the mechanism 2-1; the target plate 1 rotates, as shown in Figure 10, to drive the target removal structure 1-3 to be inserted into the notch of the target plate 3 and the target rod clamping mechanism 2-1 at the front end of the target rod 2; then , the target rod 2 with the target piece 3 moves backward, and the target piece 3 will be stuck by the target removal structure 1-3, as shown in Figure 11, to complete the target removal action.

The method described in the present invention is not limited to the examples described in the specific implementation manner. Those skilled in the art can obtain other implementation manners according to the technical solutions of the present invention, which also belong to the technical innovation scope of the present invention.

Claims (7)

1. An automatic target changing device for use in a cyclotron vacuum, characterized in that: the automatic target changing device comprises: a target disc main body (1-1) arranged in the cyclotron vacuum, and a target disc main body (1-1) arranged on the target disc main body. The target removal structure (1-3), the target rod (2) used to extend into the cyclotron along the target disk opening (1-5) of the target disk main body to perform stripping charge telescopic motion, installed on the head of the target rod (2) The target piece (3) of the part, and the corresponding control mechanism; the target disc main body (1-1) is a rotatable target disc main body (1-1). A target disc and target bin (1-2) for storing the target piece (3) is evenly distributed on the side end surface; the control mechanism controls the target disc main body (1-1), the target rod (2), and the target removing structure (1). -3) The three cooperate and move relative to each other to complete automatic target loading and automatic target removal, thereby realizing automatic target changing; The target removal structure (1-3) is arranged on one side of the target disc opening (1-5), the target removal structure (1-3) is provided with a semicircular opening, and the direction of the semicircular opening is the same as the target removal structure. When the target disc main body (1-1) rotates in the same direction, the size of the semicircular opening matches the size of the target rod head clamping mechanism (2-1); The installation angle of the target-removing structure (1-3) is matched with the rotation angle of the target disc main body (1-1). 5) The installation angle of one side should try not to occupy the space of the target plate opening (1-5), but it cannot completely avoid the space of the target plate opening (1-5). The installation of the target plate opening (1-5) The angle should be satisfied: when the target removal structure (1-3) reaches the predetermined position of "target removal", the contact area between its opening and the target rod head clamping mechanism (2-1) is the maximum area, that is, the target removal area When the structure (1-3) reaches the station of the target head clamping mechanism, its opening direction is parallel to the ground; The top bead on the head of the target rod (2-1-6) and the top ball on the target chamber (1-2-4) must be precisely matched to ensure that the target rod can take out the target piece from the target chamber. The design structure is as follows: an adjusting nut (2-1-1) for adjusting the force and an adjusting nut (1 -2-1); Before removing the target, align the target removing structure (1-3) with the notch position of the target piece (3) and the target bar head clamping mechanism (2-1) at the front end of the target bar; The target structure (1-3) is inserted into the notch of the target piece (3) and the target rod clamping mechanism (2-1) at the front end of the target rod (2); then, the target rod (2) with the target piece (3) is inserted When moving backwards, the target piece (3) will be stuck by the target removal structure (1-3) to complete the target removal action. 2 . An automatic target changing device for use in a cyclotron vacuum according to claim 1 , wherein the target rod ( 2 ) is provided with a target rod head for clamping the head of the target rod ( 2 ). 3 . A mechanism (2-1), and a target rod rod portion (2-2); the target rod head clamping mechanism (2-1) includes an adjustment nut (2-1-1), a fork head (2-1- 2); side guard (2-1-3), top piece (2-1-4), spring (2-1-5), top ball (2-1-6); the adjusting nut (2-1- 1) Used to adjust the pressure of the spring (2-1-5) on the top ball (2-1-6), the fork (2-1-2) is used to clamp the upper and lower sides of the tail of the target piece (3), The side guards (2-1-3) are used to clamp the left and right sides of the tail of the target piece (3); the installation angle of the adjustment nut (2-1-1) is open to the opening of the target removal structure (1-3). The directions are parallel and are installed on the same side of the target rod (2) as the opening direction of the target removal structure (1-3). 3 . The automatic target changing device for use in a cyclotron vacuum according to claim 1 , wherein the target sheet ( 3 ) is provided with a target frame ( 3-1 ) and a peeling film ( 3-2 ). 4 . ), a positioning hole (3-3), and the tail of the target piece (3-4). The positioning hole (3-3) is arranged at the tail of the target piece. The top bead (2-1-6) is matched, when the tail of the target piece (3) is inserted into the fork (2-1-2) and the side guard (2-1-3) of the target bar, the top bead (2-1-3) of the target bar -1-6) Press into the positioning hole (3-3) of the target piece under the pressure of the spring, so as to complete the positioning of the target piece to the target rod. 4. An automatic target changing device for use in a cyclotron vacuum according to claim 1, characterized in that: the target disk and target compartment (1-2) is provided with an adjusting nut (1-2-1), Spring (1-2-2); top block (1-2-3), top ball (1-2-4); the adjusting nut (1-2-1) has external threads on the outer circumference, which can be screwed into the target Corresponding threaded holes of the disc body (1-1), the spring (1-2-2) passes through the top block (1-2-3) and presses the top ball (1-2-4) against the side of the target piece (3) , so that the target piece (3) is gently pressed into the target compartment of the target disc to prevent the target piece (3) from shaking in the target compartment (1-2) when the target disc rotates. 5. An automatic target changing method in a cyclotron vacuum based on any one of claims 1-4 for an automatic target changing device in a cyclotron vacuum, wherein the automatic target changing method comprises the following steps : Step 1. When loading the target, the control mechanism controls the main body of the target disc (1-1) and the target rod (2) to rotate to the positions that cooperate with each other when loading the target, so as to complete the target loading process; Step 2: When the target is removed, the control mechanism controls the main body of the target disc (1-1) and the target rod (2) to rotate to the positions where they cooperate with each other when the target is removed, thereby completing the target removal process. 6. the automatic target changing method in a kind of cyclotron vacuum according to claim 5, is characterized in that: the target loading process of described step 1 is as follows: 1) The control mechanism controls the main body of the target disc (1-1) to rotate along the position of the shaft hole (1-4) of the target disc, so that the main body of the target disc (1-1) is at the current position of the target compartment (1-2) of the target disc The opening of the target rod head clamping mechanism (2-1) facing the front end of the target rod; 2) The control mechanism controls the target rod (2) to move toward the main body of the target disc (1-1), so that the head of the target rod (2-1) at the front end of the target rod (2) can withstand and lock the current target disc and target bin (1). -2) The target handle at the tail of the upper target piece; 3) The control mechanism controls the target rod (2) to move back, drives the target handle at the tail of the current target piece (3), and takes out the target piece (3) corresponding to the target handle, thus realizing the installation of the target piece (3) into the target piece (3). On the target rod (2), the target loading process is completed. 7. the automatic target changing method in a kind of cyclotron vacuum according to claim 5, it is characterized in that: the target removing process of described step 2 is as follows: 1) The control mechanism controls the rotation of the target disc main body (1-1), so that the target removal structure (1-3) on the target disc main body (1-1) enters the target removal station; 2) The control mechanism moves the target rod (2) equipped with the target piece (3) to the target removal preparation position; 3) The control mechanism controls the target removal structure (1-3) to continue to rotate from the target removal station to a position where it can lock the target rod head clamping mechanism (2-1); 4) The control mechanism controls the target rod (2) to move backward, and the target removal structure (1-3) snaps out the target piece (3) from the target rod head clamping mechanism (2-1).

Images