阅读说明：本技术 一种基于直线导轨的bnct法拉第筒 (BNCT Faraday cylinder based on linear guide rail ) 是由 栗冰婕 于 2019-09-29 设计创作，主要内容包括：本发明公开了一种基于直线导轨的BNCT法拉第筒,该法拉第筒沿轴向从前到后顺序包括：法拉第筒头部组焊件、法拉第筒支撑组件、波纹管组焊件、真空腔组件、密封法兰组件、气缸支撑组件；特点是在气缸支撑组件和法拉第筒头部组焊件之间沿波纹管组焊件上下两侧还布设有相互平行且间隔一定距离的导轨组件和支撑体组件,该导轨组件和支撑体组件各自在相对一侧的一端通过波纹管组焊件连接法拉第筒头部组焊件、各自在相对一侧的另一端连接气缸支撑组件；所述气缸支撑组件作用于所述导轨组件上且作直线运动、通过导轨组件带动真空腔组件进而带动法拉第筒头部组焊件向着目标位置移动。本发明将连接杆改进为滑轨,使得气缸运动顺畅,不再发生速度减缓的问题。(The invention discloses a BNCT Faraday cage based on a linear guide rail, which sequentially comprises the following components from front to back along the axial direction: the device comprises a Faraday cylinder head assembly welding part, a Faraday cylinder supporting assembly, a corrugated pipe assembly welding part, a vacuum cavity assembly, a sealing flange assembly and a cylinder supporting assembly; the device is characterized in that a guide rail component and a support component which are parallel to each other and are spaced at a certain distance are further arranged between the cylinder support component and the Faraday cylinder head assembly welding part along the upper side and the lower side of the corrugated pipe assembly welding part, one end of each of the guide rail component and the support component on the opposite side is connected with the Faraday cylinder head assembly welding part through the corrugated pipe assembly welding part, and the other end of each of the guide rail component and the support component on the opposite side is connected with the cylinder support component; the cylinder supporting assembly acts on the guide rail assembly and moves linearly, and the vacuum cavity assembly is driven by the guide rail assembly to drive the Faraday cylinder head assembly welding piece to move towards a target position. According to the invention, the connecting rod is improved into the sliding rail, so that the cylinder moves smoothly, and the problem of speed reduction is avoided.)

1. A BNCT Faraday cage based on a linear guide rail, which comprises the following components in sequence from front to back along the axial direction: the device comprises a Faraday cylinder head assembly welding part, a Faraday cylinder supporting assembly, a corrugated pipe assembly welding part, an auxiliary vacuum cavity assembly, a sealing flange assembly and a cylinder supporting assembly; the Faraday cylinder head assembly and welding piece is used for blocking and intercepting the beam current and measuring the intensity of the beam current; the Faraday cylinder supporting assembly is used for connecting a Faraday cylinder head assembly welding part and a cylinder supporting assembly; the corrugated pipe assembly welding piece is used for performing pressure reduction control on the moving process of the cylinder; the auxiliary vacuum cavity assembly is used for ensuring the vacuum degree of the Faraday cylinder; the sealing flange assembly is used for vacuum sealing and water-cooling sealing;

the method is characterized in that:

a guide rail assembly and a right support assembly which are parallel to each other and are spaced at a certain distance are further arranged between the cylinder support assembly and the Faraday cylinder head assembly welding part along the upper side and the lower side of the corrugated pipe assembly welding part, one end of each of the guide rail assembly and the right support assembly on the opposite side is connected with the Faraday cylinder head assembly welding part through the corrugated pipe assembly welding part, and the other end of each of the guide rail assembly and the right support assembly on the opposite side is connected with the cylinder support assembly; the cylinder supporting assembly acts on the guide rail assembly and moves linearly, and the auxiliary vacuum cavity assembly is driven by the guide rail assembly to drive the corrugated pipe assembly welding piece and the Faraday cylinder head assembly welding piece to move towards a target position.

2. The linear guide based BNCT faraday cage of claim 1, wherein: the cylinder supporting assembly is composed of a cylinder, a cylinder dragging plate, a left screw rod support, a middle screw rod support and a right screw rod support, the cylinder supporting assembly is connected with a guide rail assembly on one side of the cylinder supporting assembly through screws, and is connected with an auxiliary vacuum cavity assembly at the front end of the cylinder supporting assembly through screws, and the cylinder is driven by 2 sliding blocks on the screw rod support to move along the direction of a linear guide rail as a power source.

3. The linear guide based BNCT faraday cage of claim 1, wherein: the Faraday cylinder head assembly welding part comprises a Faraday cylinder testing head and a water-cooling pipe, wherein the water-cooling pipe is led out from the Faraday cylinder testing head, penetrates through the Faraday cylinder supporting assembly and continues to the sealing flange assembly; the Faraday cylinder head assembly welding piece is also provided with a Faraday cylinder outer-wrapping assembly which surrounds the periphery of the Faraday cylinder body and is used for insulation.

4. The linear guide based BNCT faraday cage of claim 1, wherein: the Faraday cylinder head support assembly comprises a head connecting flange and a support sleeve, wherein the support sleeve is connected with a Faraday cylinder head assembly welding part through the head connecting flange and is connected with the inner diameter of a corrugated pipe of the corrugated pipe assembly welding part through the outer diameter of the support sleeve; the sealing flange is connected with the auxiliary vacuum cavity electric connector through a sealing ring.

5. The linear guide based BNCT Faraday cage of claim 4, wherein: the auxiliary vacuum cavity assembly is used for mounting an electric connector and a lead screw bracket connected with a cylinder supporting assembly, and the electric connector is used for connecting the Faraday cage testing head; the auxiliary vacuum cavity assembly comprises an auxiliary vacuum cavity electric connector, an auxiliary vacuum cavity insulating plate, an auxiliary vacuum cavity upper plate, an auxiliary vacuum cavity lower plate, an auxiliary vacuum cavity front plate and an auxiliary vacuum cavity rear plate; the auxiliary vacuum chamber is processed in an integrated way; the auxiliary vacuum cavity assembly axially leads the front plate of the auxiliary vacuum chamber and the rear plate of the auxiliary vacuum chamber to pass through the water-cooled tube, and one end of the auxiliary vacuum cavity assembly, which is close to the corrugated tube, is respectively connected with the supporting sleeve and the corrugated tube sealing flange by screws.

6. The linear guide based BNCT faraday cage of claim 1, wherein: the sealing flange component is provided with a vacuum sealing flange 1, a vacuum sealing flange 2, a water-cooling sealing flange 1 and a water-cooling sealing flange 2 in sequence from the auxiliary vacuum cavity component in the axial direction; the water-cooled tube is composed of a water-cooled tube 1 and a water-cooled tube 2, the water-cooled tube 1 and the water-cooled tube 2 pass through two vacuum sealing flanges side by side and then are respectively stopped at the water-cooled sealing flange 1 and the water-cooled sealing flange 2, a water plug corresponding to the water-cooled tube 1 is distributed on the shell of the water-cooled sealing flange 1, and a water plug corresponding to the water-cooled tube 2 is distributed on the shell of the water-cooled sealing flange 2; the vacuum sealing flange 1 seals the vacuum of the auxiliary vacuum chamber, and the vacuum sealing flange 2 seals the vacuum of the water cooling pipe.

7. The linear guide based BNCT faraday cage of claim 1, wherein: the corrugated pipe assembly welding piece is axially and sequentially provided with a base flange, a corrugated pipe and a corrugated pipe connecting flange; the corrugated pipe is respectively welded with the base flanges and the corrugated pipe connecting flanges at two ends, the compression rate of the corrugated pipe reaches 70%, the length of the corrugated pipe in a compression limit state is 119.34mm, and the requirement of the improved Faraday cylinder on stroke is met; the corrugated pipe assembly and welding piece and the Faraday cylinder supporting assembly are connected through the inner diameter of the corrugated pipe and the outer diameter of the supporting sleeve.

8. The linear guide based BNCT faraday cage of claim 1, wherein: the guide rail assembly comprises a left support body arranged opposite to the right support body, a guide rail arranged on the lower end face of the left support body, and a sliding block arranged on the guide rail, wherein the left support body is a main bearing part and is made of 304 stainless steel materials.

9. The linear guide based BNCT faraday cage of claim 1, wherein: the right support body assembly comprises a right support body and a travel switch arranged on the right support body; one side of the screw rod bracket, which is close to the right support body, is provided with a travel switch collision block, and the stroke of the air cylinder is controlled through the contact of the travel switch collision block and the travel switch; the right support body plays a role in bearing, so that the right support body is made of 304 stainless steel materials.

Technical Field

The invention belongs to the technical field of cyclotron, and particularly relates to a BNCT Faraday cylinder for measuring ion source beam intensity.

Background

The cyclotron is a device which uses magnetic field and electric field to make charged particles do cyclotron motion together, and the charged particles are repeatedly accelerated by high-frequency electric field in the motion, and is an important instrument in high-energy physics, wherein the superconducting cyclotron is the core equipment of the current medical proton treatment accelerator. The medical proton treatment accelerator can realize the treatment of tumors by using protons and heavy ion rays in the microscopic world, is the most advanced radiotherapy technology in the world, and is mastered and applied only in other developed countries.

The core capacity improvement project of the Longteng 2020 science and technology innovation plan needs to develop a set of accelerator equipment for lowering an ion source injection line, and a Faraday cylinder assembly for measuring beam current intensity is an important component of the accelerator equipment.

The faraday cage is an interception type beam current diagnostic device commonly used in an accelerator device, and has the function of blocking and intercepting beam current and measuring the intensity of the beam current. When the beam (the collection of charged particles) bombards the electrode and is intercepted and collected by the electrode, the charges carried by the beam flow through the resistor to form a loop, so that the flow intensity of the beam is measured.

Faraday cages impose strict requirements on the fluency of motion. The prior art faraday cages suffer from the following problems: as shown in figure 9, the movement of the Faraday cage needs to be completed by a cylinder, the existing Faraday cage utilizes a piston rod of the cylinder to push a cylinder supporting plate, the cylinder supporting plate is connected with a cylinder supporting plate connecting rod, the cylinder supporting plate connecting rod directly acts on a Faraday cage supporting assembly, and a Faraday cage head assembly welding part is driven to move by the Faraday cage supporting assembly. From the experiments of the actual field operation of CYCIAE-100, the movement of the cylinder supporting plate connecting rod is difficult and cannot ensure the straight line, and the cylinder supporting plate connecting rod is easy to deform while the speed is reduced.

Disclosure of Invention

The invention provides a BNCT Faraday cylinder based on a linear guide rail, aiming at solving the problems that the existing Faraday cylinder supporting plate connecting rod is difficult to move, cannot ensure straight line movement, slows down the speed and is easy to deform the cylinder supporting plate connecting rod.

A BNCT Faraday cage based on a linear guide rail, which comprises the following components in sequence from front to back along the axial direction: the device comprises a Faraday cylinder head assembly welding part, a Faraday cylinder supporting assembly, a corrugated pipe assembly welding part, an auxiliary vacuum cavity assembly, a sealing flange assembly and a cylinder supporting assembly; the Faraday cylinder head assembly and welding piece is used for blocking and intercepting the beam current and measuring the intensity of the beam current; the Faraday cylinder supporting assembly is used for connecting a Faraday cylinder head assembly welding part and a cylinder supporting assembly; the corrugated pipe assembly welding piece is used for performing pressure reduction control on the moving process of the cylinder; the auxiliary vacuum cavity assembly is used for ensuring the vacuum degree of the Faraday cylinder; the sealing flange assembly is used for vacuum sealing and water-cooling sealing;

the method is characterized in that:

a guide rail assembly and a right support assembly which are parallel to each other and are spaced at a certain distance are further arranged between the cylinder support assembly and the Faraday cylinder head assembly welding part along the upper side and the lower side of the corrugated pipe assembly welding part, one end of each of the guide rail assembly and the right support assembly on the opposite side is connected with the Faraday cylinder head assembly welding part through the corrugated pipe assembly welding part, and the other end of each of the guide rail assembly and the right support assembly on the opposite side is connected with the cylinder support assembly; the cylinder supporting assembly acts on the guide rail assembly and moves linearly, and the guide rail assembly drives the auxiliary vacuum cavity assembly to drive the bellows assembly welding piece and the Faraday cylinder head assembly welding piece to move towards a target position.

The cylinder supporting assembly is composed of a cylinder, a cylinder dragging plate and a left part, a middle part and a right part of a screw rod support, the cylinder supporting assembly is connected with a guide rail assembly on one side of the cylinder supporting assembly through a screw and is connected with an auxiliary real cavity assembly at the front end of the cylinder supporting assembly through a screw, and the cylinder is driven by 2 sliding blocks on the screw rod support to move along the direction of a linear guide rail as a power source.

The Faraday cylinder head assembly welding part comprises a Faraday cylinder testing head and a water-cooling pipe, wherein the water-cooling pipe is led out from the Faraday cylinder testing head, penetrates through the Faraday cylinder supporting assembly and continues to the sealing flange assembly; the Faraday cylinder head assembly welding piece is also provided with a Faraday cylinder outer-wrapping assembly which surrounds the periphery of the Faraday cylinder body and is used for insulation.

The Faraday cylinder head support assembly comprises a head connecting flange and a support sleeve, wherein the support sleeve is connected with a Faraday cylinder head assembly welding part through the head connecting flange and is connected with the inner diameter of a corrugated pipe of the corrugated pipe assembly welding part through the outer diameter of the support sleeve; the sealing flange is connected with the auxiliary vacuum cavity electric connector through a sealing ring.

The auxiliary vacuum cavity assembly is used for mounting an electric connector and a lead screw bracket connected with a cylinder supporting assembly, and the electric connector is used for connecting the Faraday cage testing head; the auxiliary vacuum cavity assembly comprises an auxiliary vacuum cavity electric joint, an auxiliary vacuum cavity insulating plate, an auxiliary vacuum cavity upper plate, an auxiliary vacuum cavity lower plate, an auxiliary vacuum cavity front plate and an auxiliary vacuum cavity rear plate; the auxiliary vacuum chamber is processed in an integrated way; the auxiliary vacuum cavity assembly axially opens the front plate of the auxiliary vacuum chamber and the rear plate of the auxiliary vacuum chamber for penetrating through the water-cooled tube, and one end of the auxiliary vacuum cavity assembly, which is close to the corrugated tube, is respectively connected with the supporting sleeve and the corrugated tube sealing flange by screws.

The sealing flange component is provided with a vacuum sealing flange 1, a vacuum sealing flange 2, a water-cooling sealing flange 1 and a water-cooling sealing flange 2 in sequence from the auxiliary vacuum cavity component in the axial direction; the water-cooled tube is composed of a water-cooled tube 1 and a water-cooled tube 2, the water-cooled tube 1 and the water-cooled tube 2 pass through two vacuum sealing flanges side by side and then are respectively stopped at the water-cooled sealing flange 1 and the water-cooled sealing flange 2, a water plug corresponding to the water-cooled tube 1 is distributed on the shell of the water-cooled sealing flange 1, and a water plug corresponding to the water-cooled tube 2 is distributed on the shell of the water-cooled sealing flange 2; the vacuum sealing flange 1 seals the auxiliary vacuum chamber for vacuum, and the vacuum sealing flange 2 seals the water cooling pipe for vacuum.

The corrugated pipe assembly welding piece is axially and sequentially provided with a base flange, a corrugated pipe and a corrugated pipe connecting flange; the corrugated pipe is respectively welded with the base flanges and the corrugated pipe connecting flanges at two ends, the compression rate of the corrugated pipe reaches 70%, the length of the corrugated pipe in a compression limit state is 119.34mm, and the requirement of improving the Faraday cylinder on stroke is met; the corrugated pipe assembly welding piece and the Faraday cylinder supporting assembly are connected through the inner diameter of the corrugated pipe and the outer diameter of the supporting sleeve.

The guide rail assembly comprises a left support body arranged opposite to the right support body, a guide rail arranged on the lower end face of the left support body, and a sliding block arranged on the guide rail, wherein the left support body is a main bearing part and is made of 304 stainless steel materials.

The right support body assembly comprises a right support body and a travel switch arranged on the right support body; one side of the screw rod bracket, which is close to the right support body, is provided with a travel switch collision block, and the stroke of the air cylinder is controlled through the contact of the travel switch collision block and the travel switch; the right support body plays a role in bearing, so that the right support body is made of 304 stainless steel materials.

Advantageous effects of the invention

The invention improves the shape of the connecting rod of the supporting plate of the existing cylinder supporting component, the connecting rod of the supporting plate of the improved cylinder is changed into a U shape from a straight line shape, two sides of the U-shaped bracket act on the left and right supporting bodies, the U-shaped bracket is connected with the cylinder, two sliding blocks are arranged on one side of the U-shaped bracket and act on the sliding rails of the supporting bodies, and the sliding rails act on the supporting bodies, so that the bearing object of the Faraday cylinder is improved from bearing by the connecting rod to bearing by the supporting bodies on two sides, and the problems of gravity center offset and deformation of the connecting rod caused by too large bearing are effectively solved, thereby solving the problems of difficult movement and slow speed of the cylinder caused by the component.

The invention transfers the bearing object to the supporting bodies at two sides by improving the shape of the connecting rod of the cylinder carriage, although the connecting rod is directly connected with the Faraday cylinder, the connecting rod does not bear the main gravity of the Faraday cylinder, thereby fundamentally solving the problems of center of gravity shift and deformation of the connecting rod caused by too large bearing, generating a leap from quantitative change to qualitative change and generating unexpected effects.

Drawings

FIG. 1 is a front view of a schematic view of a Faraday cage assembly of the present invention;

FIG. 2 is a top view of a Faraday cup apparatus of the present invention;

FIG. 3 is a schematic cross-sectional view of a Faraday cage of the present invention;

FIG. 4 is a schematic view of the cylinder support assembly of the present invention;

FIG. 5 is a schematic view of the track assembly of the present invention;

FIG. 6a is a schematic view of a Faraday cup head assembly weldment of the present invention;

FIG. 6b is a schematic view of a bottom surface water cooling tank of a Faraday cylinder test head of the present invention;

FIG. 7 is a schematic view of a vacuum chamber assembly according to the present invention;

FIG. 8a is a first perspective view of the sealing flange assembly of the present invention;

FIG. 8b is a second perspective view of the sealing flange assembly of the present invention;

FIG. 9 is a diagram of a prior art Faraday cage configuration;

FIG. 10 is a diagram illustrating the effect of the Faraday cage of the present invention applied to a vacuum chamber of a cyclotron;

in the figure: 1: a Faraday cup head assembly weldment; 1-1: a Faraday cage test head; 1-1-1: the front surface of the Faraday cylinder testing head; 1-1-2: the reverse side of the Faraday cup test head; 1-1-2-1: a water tank on the bottom plate of the Faraday cup testing head; 1-2: a water-cooled tube; 1-2-1: a water-cooled tube 1; 1-2-2: a water-cooled tube 2; 1-4: a magnet placement position; 1-5: a water-cooling pipe brazing part; 1-6: the electric connector is screwed with the hole; 2: a Faraday cage support assembly; 2-1: a head connecting flange; 2-2: a support sleeve; 3: a bellows assembly weldment; 3-1: a base flange; 3-2: a bellows; 3-3: a corrugated pipe connecting flange; 4: a guide rail assembly; 4-1: a left support; 4-2: a guide rail; 4-3: a slider; 5: an auxiliary vacuum chamber assembly; 5-1: an auxiliary vacuum cavity electrical connector; 5-2: an auxiliary vacuum cavity insulating plate; 5-3: an auxiliary vacuum cavity upper plate; 5-:4: an auxiliary vacuum chamber; 5-5: a lower plate of the auxiliary vacuum cavity; 5-6: a front plate of the auxiliary vacuum cavity; 5-7: a back plate of the auxiliary vacuum cavity; 6: a sealing flange assembly; 6-1: a vacuum chamber sealing flange 1; 6-1-1: an auxiliary vacuum cavity sealing flange; 6-2: a vacuum chamber sealing flange 2; 6-3: a water-cooled sealing flange 1; 6-3-1: a water-cooled joint; 6-4: water-cooling the sealing flange; 6-4-1: a water-cooled joint; 2; 7: a cylinder support assembly; 7-1: a cylinder; 7-2: a cylinder carriage; 7-3: a screw rod bracket; 7-4: a travel switch collision block; 8: a right support body; 8-1: a travel switch; 9: mechanical gag lever post. 10: a prior art faraday cup structure; 10-1: a cylinder; 10-2: a cylinder carriage; 10-3: a cylinder carriage connecting rod. .

Detailed Description

Embodiments of the present invention will be further described with reference to the accompanying drawings.

The design principle of the invention is as follows:

1. design principle of guide rail + cylinder: in the prior art, as shown in fig. 10, several cylinder carriage connecting rods 10-3 are arranged between a cylinder and a vacuum cavity, and because the connecting rods have a certain length, when the connecting rods are pushed by the cylinder, the connecting rods are extruded forwards and backwards, so that the center of gravity of the connecting rods is shifted, namely, the center of gravity is not at the center point of the connecting rods, so that lateral force is generated, even the connecting rods are deformed, and the connecting rods cannot move linearly due to the lateral force; since the connecting rod generates a lateral force, the cylinder needs to split a portion of the thrust force to overcome this lateral pressure, thus making cylinder speed reduction and movement difficult. The connecting rod is improved into the sliding rail, the supports on the two sides of the sliding rail bear the main gravity of the Faraday cylinder, the screw rod support does not bear the main gravity of the Faraday cylinder any more, the screw rod support cannot deform and keep a straight line because the screw rod support is lightened by the gravity, and the air cylinder does not need to overcome resistance generated by lateral force because the center of gravity of the screw rod support does not shift any more, so that the air cylinder moves smoothly and the problem of speed reduction is avoided.

2. The design of the sealing flange integrating vacuum sealing and water cooling sealing.

Problem of the prior art

Faraday cages have stringent requirements for vacuum. The middle sleeve of the original CYCIAE100 south-beam streamline Faraday cylinder support is directly connected with a flange at the tail end of the support, a hole is formed in the middle of the flange to reserve a space for a water-cooling pipe, a sealing element is not added to guarantee vacuum, and the service life of the Faraday cylinder can be shortened due to vacuum leakage.

The Faraday cylinder has high requirement on the reliability of the water cooling pipeline. The water-cooling pipeline of the original Faraday cylinder adopts a copper pipe, a stainless steel joint is connected with the water pipe, the copper pipe can deform to a certain degree after compression joint so as to achieve sealing, and if the Faraday cylinder water-cooling joint is disassembled and maintained, the joint can be installed again after the deformation part is cut off;

the problem of vacuum sealing is solved. The invention designs an auxiliary vacuum cavity, aims to arrange an electric connector connected to a Faraday cylinder test head at the front end, and also aims to connect a screw rod bracket through the auxiliary vacuum cavity and drive the Faraday cylinder test head to move through the screw rod bracket. In order to keep the auxiliary vacuum chamber in a vacuum state all the time, the sealing problem of the auxiliary vacuum chamber needs to be solved. The auxiliary vacuum chamber seal first seals the first space in face-to-face contact. As shown in fig. 7, 8a and 8b, the circular surface of the vacuum chamber in fig. 7 is to be attached to the right side surface of 6-1 in fig. 8a, and a sealing ring is added at 6-1-1 of the attachment position for sealing the gap between the circular surface of the vacuum chamber and the right side surface of the flange surface of 6-1, which is the first layer of vacuum sealing of the vacuum chamber; because the cold water pipe can not be stopped in the vacuum sealing flange 6-1, but passes through the first flange until reaching the fourth flange, the water cooling seal is added on the contact surface of the water pipe passing through the vacuum sealing flange 6-1 and the next flange, and the auxiliary vacuum cavity can not be sealed by two seals. Because the requirement on the vacuum degree is very high, the design of the invention is to add a layer of vacuum sealing flange on the basis of the first layer of vacuum sealing flange, so the invention still designs the next flange 6-2 as the vacuum sealing flange, and adds a layer of sealing ring on the contact surface of the two flanges 6-1 and 6-2, which is the second layer of sealing of the auxiliary vacuum cavity.

And solving the problem of water cooling sealing. The first problem to be solved by the water-cooling seal is that: when the Faraday cylinder water-cooling connector is disassembled and maintained, the problem that the connector can be installed again only by cutting off the compression joint deformation part of the water pipe does not occur any more. The invention moves the water-cooling joint from the end of the water-cooling pipe to the water-cooling sealing flange, so that the water-cooling pipe can not generate the problem of compression joint deformation because the water-cooling pipe is not contacted with the water joint any more. The second problem to be solved by the water-cooling seal is that: the disassembly process of the water-cooling joint and the water-cooling sealing flange is facilitated. The water-cooling joint and the water-cooling sealing flange are connected by adopting a method of threads and biochemical bands, and when the water-cooling joint needs to be disassembled from the water-cooling sealing flange, the disassembling process can be completed only by rotating along the threads of the water-cooling joint.

Based on the principle, the invention designs the BNCT Faraday cage based on the linear guide rail.

A BNCT faraday cage based on linear guide is shown in fig. 1, 2 and 3, and comprises sequentially from front to back along the axial direction: the Faraday cup assembly comprises a Faraday cup head assembly weldment 1, a Faraday cup support assembly 2, a corrugated pipe assembly weldment 3 for connecting the outer diameter of the Faraday cup with the inner diameter of a corrugated pipe, an auxiliary vacuum cavity assembly 5, a sealing flange assembly 6 and a cylinder support assembly 7; the Faraday cylinder head assembly and welding piece 1 is used for blocking and intercepting the beam current and measuring the intensity of the beam current; the Faraday cylinder supporting component 2 is a bridge for connecting a Faraday cylinder head assembly welding part and a cylinder supporting component and is used for supporting the Faraday cylinder head assembly welding part to move under the pushing of the cylinder supporting component; the auxiliary vacuum cavity assembly 5 is used for ensuring the vacuum degree of the Faraday cylinder; the sealing flange assembly 6 is used for vacuum sealing and water-cooling sealing;

the method is characterized in that:

a guide rail component 4 and a right support component 8 which are parallel to each other and are at a certain distance are further arranged between the cylinder support component 7 and the Faraday cylinder head assembly welding piece 1 along the upper side and the lower side of the corrugated pipe assembly welding piece 3, one end of each opposite side of the guide rail component 4 and the right support component 8 is connected with the Faraday cylinder head assembly welding piece through the corrugated pipe assembly welding piece, and the other end of each opposite side of the guide rail component 4 and the right support component 8 is connected with the cylinder support component 7; the cylinder supporting assembly 7 acts on the guide rail assembly 4 and moves linearly, and the auxiliary vacuum cavity assembly 5 is driven by the guide rail assembly 4 so as to drive the corrugated pipe assembly weldment 3 and the Faraday cylinder head assembly weldment 1 to move towards a target position.

As shown in figure 4, the cylinder supporting component 7 is composed of a cylinder 7-1, a cylinder carriage 7-2, a screw rod bracket 7-3, a left part, a middle part and a right part, the cylinder supporting component 7 is connected with a guide rail component 4 on one side of the cylinder through screws and is connected with a vacuum chamber component 5 at the front end of the cylinder through screws, and the cylinder 7-1 is used as a power source and is driven by 2 sliding blocks on the screw rod bracket 7-3 to run along the direction of a linear guide rail.

As shown in fig. 6a and 6b, the faraday cup head assembly weldment 1 comprises a faraday cup test head 1-1 and a water-cooled tube 1-2 which is led out from the faraday cup test head 1-1, penetrates through the faraday cup support assembly 2 and continues to a sealing flange assembly 6; the Faraday cup head assembly welding part 1 is also provided with a Faraday cup outer-wrapping assembly which is used for insulation and surrounds the periphery of a Faraday cup body.

Supplementary explanation:

the faraday cage outer package assembly comprises: 4 pieces of side insulating spacers, 2 pieces of upper insulating spacers, a lower insulating spacer, a Faraday cylinder head outer package and a Faraday cylinder head outer package lower plate. The insulating part is made of nylon 66.

Supplementary explanation:

permanent magnets are placed in grooves formed in two sides of the Faraday cylinder test head 1-1, and the purpose is to inhibit secondary electrons from escaping by utilizing a magnetic field. The Faraday cylinder body material generally adopts red copper, and the silver brazing is used for welding the water pipe and the cylinder body, so that the Faraday cylinder has the advantages of smooth joint surface, good sealing property and small deformation. The bottom of the Faraday cylinder test head 1-1 is provided with a water-cooling pipe groove for providing heat dissipation for the running Faraday cylinder.

As shown in fig. 1, the faraday cage head support assembly comprises a head connecting flange 2-1 and a support sleeve 2-2, wherein the support sleeve 2-2 is connected with a faraday cage head assembly welding member 1 through the head connecting flange 2-1 and is connected with the inner diameter of a corrugated pipe assembly welding member 3 through the outer diameter of the support sleeve 2-2; the sealing flange is connected with the auxiliary vacuum cavity electric connector through a sealing ring.

Supplementary explanation:

the Faraday cup head support assembly is characterized in that a head connecting flange is made of 304 stainless steel, and a support sleeve is made of LY 12. The outer diameter of the supporting sleeve is matched with the inner diameter of the corrugated pipe, and each side is provided with a margin of 0.5 mm.

As shown in fig. 7, the auxiliary vacuum chamber assembly 5 is used for installing an auxiliary vacuum chamber electric connector 5-1 and a lead screw bracket 7-3 connected with a cylinder supporting assembly 7, and the auxiliary vacuum chamber electric connector 5-1 is used for connecting with the faraday cage testing head 1-1; the auxiliary vacuum cavity assembly 5 comprises an auxiliary vacuum cavity electric connector 5-1, an auxiliary vacuum cavity insulating plate 5-2, an auxiliary vacuum cavity upper plate 5-3, an auxiliary vacuum cavity lower plate 5-5, an auxiliary vacuum cavity 5-4, an auxiliary vacuum cavity front plate 5-6 and an auxiliary vacuum cavity rear plate 5-7; the auxiliary vacuum chamber is processed in an integrated way; the auxiliary vacuum cavity assembly 5 axially breaks through an auxiliary vacuum chamber front plate 5-6 and an auxiliary vacuum chamber rear plate 5-7 for passing through a water cooling pipe, and one end, close to the corrugated pipe, of the auxiliary vacuum cavity assembly 5 is connected with the supporting sleeve 2-2 and the corrugated pipe sealing flange 3-3 through screws respectively.

Supplementary explanation:

auxiliary vacuum cavity components 5-1 are wired to reserve space; the front of the vacuum cavity component is a vacuum cavity flange 6-1 which is connected with a vacuum sealing flange 6-1 through 4M 4-6 screws, and 6M 3-7 screws are connected with a supporting sleeve 2-2; 4M 3-6 screws are connected with an auxiliary vacuum chamber assembly sealing flange and an auxiliary vacuum chamber electric connector 5-1, 6M 4-16 screws are connected with a vacuum chamber 5-4 (comprising a vacuum chamber upper plate) and an auxiliary vacuum chamber electric connector sealing flange, and a first vacuum sealing flange 6-1 of the auxiliary vacuum chamber electric connectors is made of an insulating material, namely nylon 66, so that the sealing flange 6-1 is insulated from a water cooling pipe.

As shown in fig. 8, the sealing flange assembly 6 is provided with a vacuum sealing flange 1, a vacuum sealing flange 2, a water-cooling sealing flange 1 and a water-cooling sealing flange 2 in order from the vacuum chamber assembly in the axial direction; the water-cooled tube is composed of a water-cooled tube 1 and a water-cooled tube 2, the water-cooled tube 1 and the water-cooled tube 2 pass through two vacuum sealing flanges side by side and then are respectively stopped at the water-cooled sealing flange 1 and the water-cooled sealing flange 2, a water plug corresponding to the water-cooled tube 1 is distributed on the shell of the water-cooled sealing flange 1, and a water plug corresponding to the water-cooled tube 2 is distributed on the shell of the water-cooled sealing flange 2; the vacuum sealing flange 1 seals the vacuum of the auxiliary vacuum chamber, and the vacuum sealing flange 2 seals the vacuum of the water cooling pipe;

supplementary explanation:

the vacuum sealing flange 1 corresponds to 6-1 of fig. 8, the vacuum sealing flange 2 corresponds to 6-2 of fig. 8, the water-cooling sealing flange 1 corresponds to 6-3 of fig. 8, and the water-cooling sealing flange 2 corresponds to 6-4 of fig. 8; the sealing flange assemblies are made of insulating material nylon 66 in consideration of the penetration of the water cooling pipes; the 12M 5-25 screws are divided into four groups and are evenly distributed on the 4 sealing flange pieces in the circumferential direction.

As shown in fig. 2, a base flange 3-1, a corrugated pipe 3-2 and a corrugated pipe connecting flange 3-3 are sequentially distributed on the corrugated pipe assembly weldment 3 in the axial direction; the corrugated pipe 3-2 is respectively welded with the base flange 3-1 and the corrugated pipe connecting flange 3-3 at two ends, the compression rate of the corrugated pipe reaches 70%, the length of the corrugated pipe in a compression limit state is 119.34mm, and the requirement of improving the Faraday cylinder on the stroke is met; the corrugated pipe assembly and welding piece and the Faraday cylinder supporting assembly are connected through the inner diameter of the corrugated pipe and the outer diameter of the supporting sleeve.

Supplementary explanation:

8M 3-9 screws are connected with the guide rail assembly and the auxiliary vacuum cavity assembly, and the cylinder is used as a power source and driven by 2 sliding blocks to run along the direction of the linear guide rail. Because the lead screw bracket and the cylinder carriage are not main bearing parts, the LY12 material is selected to be made under the condition of meeting the strength requirement.

As shown in fig. 5, the guide rail assembly 4 includes a left support 4-1 disposed opposite to the right support 8, a guide rail 4-2 disposed on a lower end surface of the left support 4-1, and a slider 4-3 disposed on the guide rail, and the left support 4-1 is a main load-bearing component and is made of 304 stainless steel.

As shown in fig. 1, the right support body assembly comprises a right support body 8 and a travel switch 8-1 arranged on the right support body; one side of the screw rod bracket 7-3, which is close to the right support body 8, is provided with a travel switch collision block 7-4, and the stroke of the air cylinder 7-1 is controlled through the contact of the travel switch collision block 7-4 and the travel switch 8-1; the right support body 8 plays a role in bearing, so that the right support body is made of 304 stainless steel materials; the travel switch is a purchased part; the material of the upper plate of the travel switch is LY 12.