An automatic shielding device for a tumor particle beam current distribution device

Abstract

This invention relates to an automatic protective device for tumor particle beam distribution equipment, comprising a working platform, an equipment base, a particle emission base, a protective cover, a guide bracket, a baffle plate, an air curtain structure, a micropore cleaning component, and an emergency triggering component. The protective cover is detachably connected to the equipment base via magnetic attraction. Connecting pipes on both sides of the cover cooperate with the spray nozzles to form an air curtain to block impurities. The baffle plate is constrained by a traction rope. When the equipment is misaligned, the traction rope breaks, and the baffle plate descends under gravity to block impurities. The tungsten sand fluid inside the rubber bladder is pressurized to achieve a seal. The emergency triggering component cooperates with a beam monitoring sensor to quickly cut off the connection in case of accidental emission. The baffle plate provides emergency blocking under the action of a compression spring. When the baffle plate descends, a scraper and a micropore cleaning component simultaneously clean the surface of the emission end and the precision micropores. This invention solves the problems of existing protective devices having a single beam blocking trigger, slow baffle plate response speed, and poor protective effect.

Description

Technical Field

[0001] This invention belongs to the field of medical auxiliary devices and relates to an automatic protection device suitable for tumor particle beam distribution equipment. Background Technology

[0002] Proton and heavy ion therapy is currently an advanced precision treatment method for malignant tumors in clinical practice. As the core and key equipment of this treatment system, the particle beam distribution equipment plays a crucial role in precisely guiding high-energy particle beams to the tumor lesion location to achieve targeted killing of tumor cells. The particle emission base, as the core component of the particle beam distribution equipment, has a precision micro-hole at its end that is the only exit channel for the particle beam. The straightness and cleanliness of the micro-hole directly determine the emission direction and accuracy of the particle beam, thus affecting the effect of tumor treatment. Therefore, dust protection, precision cleaning, and beam blockage in case of emergencies at the emission end of the particle emission base have become critical issues that urgently need to be addressed in the use of particle beam distribution equipment. Consequently, related automatic protection devices have become a key research and development focus in this field.

[0003] In the existing technology, protective devices for tumor particle beam distribution equipment have been designed, but their overall structural design still has many defects, making it difficult to meet the requirements of high precision, high safety, and high convenience for clinical use. The specific shortcomings are reflected in the following aspects:

[0004] Existing protective devices have a single beam blocking triggering method, which can only achieve passive blocking after the equipment has undergone a large unexpected displacement. The baffle plate has a slow response speed, and some devices do not even have an emergency blocking structure. When the equipment experiences a sudden situation of unexpected particle beam emission, it cannot quickly block the beam, which poses a serious safety hazard. In addition, there are often gaps between the existing baffle plate and the protective cover, resulting in poor blocking and sealing performance, which can easily lead to the leakage of particle beams from the gaps.

[0005] The existing protective devices can only perform simple wiping on the surface of the particle emission base, and cannot perform deep cleaning of the precision micropores of the emission end. The impurities after cleaning are also prone to accumulate inside the protective cavity, causing secondary pollution of the emission end and making it difficult to guarantee the cleanliness of the emission end. Summary of the Invention

[0006] In view of this, in order to solve the problems of existing protective devices having a single beam blocking trigger, slow response speed of the baffle plate, and poor protective effect, the present invention provides an automatic protective device suitable for tumor particle beam distribution equipment.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An automatic protective device for tumor particle beam distribution equipment, wherein an equipment base is fixedly assembled on a working platform, and a particle emission base with precision micropores at the emission end is fixedly installed on the equipment base;

[0009] A protective cover is fitted onto the particle emission base and detachably connected to the equipment base;

[0010] The guide bracket is fixed to the top of the protective cover and forms a sliding cavity inside; the baffle plate is slidably disposed in the sliding cavity of the guide bracket and can be raised and lowered in the vertical direction to block the emitting end of the particle emitting base.

[0011] The traction rope is connected to the guard plate at one end and fixed to the working platform at the other end by fastening screws. When the equipment base moves unexpectedly, the traction rope breaks and the guard plate descends due to gravity.

[0012] Two connecting pipes are fixed to both sides of the protective cover; multiple spray nozzles are connected to the connecting pipes and extend into the positioning slots of the protective cover. Gas is sprayed out through the spray nozzles to form an air curtain to block impurities.

[0013] The micropore cleaning component, located inside the baffle plate, works in conjunction with the air curtain to clean the micropores at the emitting end of the particle emission base.

[0014] As a further improvement to the above technical solution:

[0015] Multiple magnetic core columns are fixedly installed at one end of the protective cover near the equipment base. Metal rings are fitted on the outer wall of the magnetic core columns. The multiple metal rings are embedded in one side of the equipment base. The protective cover is attached and fixed to the equipment base by magnetic attraction.

[0016] Two sets of guide rollers are fixed at the top of the guide bracket. The middle section of the traction rope is attached to the guide rollers, and the rolling friction reduces the moving resistance of the traction rope.

[0017] The outer wall of the baffle is embedded with a U-shaped rubber bladder filled with tungsten sand fluid. When the baffle rises, the tungsten sand fluid falls, causing the center of gravity to shift downward. After the baffle descends and blocks the view, the tungsten sand fluid is compressed and fills both sides of the rubber bladder, making the rubber bladder fit and seal against the inner wall of the protective cover.

[0018] The micropore cleaning component includes a rectangular groove on one side of the baffle plate. A sliding base plate is slidably disposed in the rectangular groove. Multiple tension springs I are fixed between the sliding base plate and the baffle plate. Multiple rotating shafts are rotatably disposed through one side of the sliding base plate. A guide vane is fixedly disposed on the outer wall of one end of the rotating shaft, and a cleaning brush is fixedly disposed on the other end. After the baffle plate is lowered, the rectangular groove corresponds to the air curtain. The airflow drives the guide vane to rotate and clean the cleaning brush to clean the micropores.

[0019] The bottom of the baffle plate has an insertion hole, and the bottom wall of the protective cover is fixed with a wedge block that matches the insertion hole. When the baffle plate descends, the wedge block is inserted into the insertion hole, pushing the sliding base plate to drive the cleaning brush to insert into the micro-hole of the particle emission base.

[0020] A flow guide cover coaxial with the rotation axis is fixed on one side of the sliding base plate. The flow guide blades are located inside the flow guide cover. A flow guide baffle corresponding to the flow guide cover is also fixed on one side of the sliding base plate. The two work together to concentrate the airflow and guide it to the flow guide blades.

[0021] It also includes an emergency triggering component, which includes a connecting support located within the guide bracket. Two sliding rods I are fixedly mounted on the top wall of the guide bracket. An installation through hole is opened on the top of the baffle plate. The bottom end of the sliding rod I is slidably mounted in the installation through hole. A compression spring is installed in the installation through hole. The connecting support is slidably sleeved on the sliding rod I. One end of the traction rope near the baffle plate is fixedly connected to the connecting support. An ionization chamber type beam monitoring sensor is fixedly mounted on the inner wall of the protective cover. When an accidentally emitted particle is detected, the magnetic attraction mechanism is triggered to cut off the connection, and the baffle plate descends rapidly under the action of the compression spring.

[0022] The magnetic attraction mechanism includes two sliding supports fixed to one side of the baffle plate. A sliding rod II is slidably mounted inside the two sliding supports. A connecting sleeve is fitted on the outer wall of one end of the sliding rod II. An electromagnet block II is fixed on the inner wall of the connecting sleeve. An electromagnet block I is fixed on one end of the sliding rod II. A tension spring II is installed inside the connecting sleeve. Two locking seats are fixed on one side of the connecting supports. A locking block fixed to the top of the sliding rod II is inserted into the locking seat. When energized, the electromagnet block repels and pushes the locking mechanism. When de-energized, the tension spring pulls the locking mechanism away.

[0023] A scraper made of elastic material is embedded at the bottom of the side of the baffle plate near the particle emission base. When the baffle plate descends, the scraper first contacts the surface of the emission end of the particle emission base and scrapes away floating dust and impurities.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The automatic protective device for tumor particle beam distribution equipment disclosed in this invention has hollow fluid delivery channels in the connecting pipes on the left and right sides of the protective cover. After the bottom end is connected to an external air pump, the dry gas is diverted through the connecting pipe and sprayed out from the inclined nozzle that extends into the positioning slot, forming an annular air curtain in front of the emitting end of the particle emitting base. This air curtain forms a physical barrier through gas flow, effectively preventing external dust and water mist from contacting the emitting end or entering its precision micropores. At the same time, the dry gas can prevent condensation at the emitting end and avoid moisture oxidation of the components, ensuring the emission accuracy of the particle beam. In addition, a vacuum cleaner can be connected to one side of the connecting pipe, which, together with the hollow rotating shaft, forms a structure of air intake on one side and air exhaust on the other, providing a passage for subsequent impurity discharge.

[0026] 2. The automatic protective device for tumor particle beam distribution equipment disclosed in this invention provides precise vertical lifting and lowering guidance for the baffle plate via a guide bracket at the top of the protective cover. The baffle plate is constrained by a traction rope, maintaining its upward, shielding state. When the equipment base undergoes unexpected displacement due to earthquakes, bracket fatigue, or other reasons, the traction rope breaks due to excessive tensile force. After losing its constraint, the baffle plate slides down the guide bracket under its own weight, passing through the positioning slot to shield the emitting end of the particle emission base. The U-shaped rubber bladder embedded in the outer wall of the baffle plate is filled with tungsten sand fluid. Under normal conditions, the fluid's downward movement causes the baffle plate's center of gravity to shift downward, increasing the descent response speed. After shielding is in place, the bottom of the baffle plate is pressured to the rubber bladder, and the tungsten sand fluid fills the cavities on both sides of the bladder, causing it to expand outward and fit tightly against the inner wall of the protective cover, eliminating gaps, improving shielding sealing, and preventing particle beam leakage.

[0027] 3. The automatic protection device for tumor particle beam distribution equipment disclosed in this invention, in conjunction with the ionization chamber-type beam monitoring sensor on the inner wall of the protective cover, forms a second layer of safety protection. The compression spring in the guide bracket is normally in a compressed and energy-storing state. The baffle plate is fixed to the connecting support by a magnetic attraction mechanism. The tension of the traction rope is smoothly transmitted to the baffle plate through the connecting support. When the monitoring sensor detects an unexpected emission of the particle beam, it immediately sends an electrical signal to trigger the magnetic attraction mechanism to de-energize. The attraction force between electromagnet I and electromagnet II disappears, and the tension of spring II drives the sliding rod II to slide, causing the locking block to disengage from the locking seat, releasing the baffle plate from the connecting support. The baffle plate descends rapidly under the elastic restoring force of the compression spring, realizing emergency shielding of the emission end of the particle emission base. The response is timely and the shielding effect is reliable.

[0028] 4. The automatic protective device for tumor particle beam distribution equipment disclosed in this invention, when the baffle plate descends, its bottom elastic scraper plate first contacts the surface of the emitting end of the particle emitting base, and performs a vertical scraping motion as the baffle plate slides down, closely adhering to the emitting end surface to clean floating dust and impurities. The elastic material can avoid scratching the precision surface. At the same time, the wedge-shaped block on the bottom wall of the protective cover is inserted into the insertion hole as the baffle plate descends, pushing the sliding base plate to slide horizontally in the rectangular groove, driving the cleaning brush to be inserted into the precision micro-holes of the emitting end one by one. The airflow sprayed from the spray nozzle is guided by the guide cover and the guide baffle, and then concentrates to impact the guide vane to drive the rotating shaft to rotate, thereby causing the cleaning brush to rotate and wipe in the micro-hole, realizing deep cleaning of the micro-hole. All the impurities cleaned are promptly carried out of the protective cover by the air curtain airflow and the suction airflow to avoid secondary pollution, completing the synchronous and comprehensive cleaning of the emitting end surface and the micro-hole. After cleaning, the tension spring I can drive the sliding base plate to elastically reset.

[0029] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0031] Figure 1 This is a three-dimensional structural schematic diagram of the automatic protection device of the present invention applicable to tumor particle beam distribution equipment;

[0032] Figure 2 This is a partial cross-sectional view of the protective outer cover in this invention;

[0033] Figure 3 This is a schematic diagram of the baffle plate structure in this invention;

[0034] Figure 4 This is a schematic diagram of the magnetic attraction mechanism in this invention;

[0035] Figure 5 for Figure 3 Another perspective structural diagram;

[0036] Figure 6 for Figure 5 Enlarged structural diagram of section A in the middle;

[0037] Figure 7 This is a schematic diagram of the mounting structure of the rotating shaft and the sliding base plate in this invention;

[0038] Figure 8 This is a cross-sectional view of the baffle plate in this invention.

[0039] Reference numerals: 1. Working platform; 2. Equipment base; 21. Metal ring; 3. Particle emission base; 4. Protective cover; 41. Positioning slot; 42. Magnetic core column; 43. Wedge block; 5. Guide bracket; 51. Guide roller; 52. Sliding rod I; 6. Baffle plate; 61. Rubber bladder; 62. Rectangular groove; 63. Insertion hole; 64. Sliding base plate; 65. Tension spring I; 66. Scraper; 67. Rotating shaft; 68. Guide vane; 6 9. Flow guide cover; 610. Flow guide baffle; 611. Cleaning brush; 612. Mounting through hole; 613. Compression spring; 7. Traction rope; 8. Fastening screw; 9. Connecting pipe; 10. Spray nozzle; 11. Connecting support; 12. Magnetic attraction mechanism; 121. Sliding support; 122. Sliding rod II; 123. Snap-fit ​​block; 124. Connecting sleeve; 125. Electromagnetic block I; 126. Electromagnetic block II; 127. Tension spring II; 128. Snap-fit ​​seat. Detailed Implementation

[0040] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0041] like Figure 1 The automatic protective device shown is suitable for tumor particle beam distribution equipment. It is compatible with particle beam distribution equipment used for proton and heavy ion tumor therapy. It can realize automatic protection, dust prevention and cleaning of precision parts during equipment use. It also has an emergency shielding function. The whole assembly is mounted on the working platform 1 and is composed of equipment base 2, particle emission base 3, protective cover 4, guide bracket 5, baffle plate 6, connecting pipe 9, micropore cleaning component, emergency trigger component and other components.

[0042] The working platform 1 is the basic load-bearing component of the entire device, providing a stable horizontal mounting base for all parts. The equipment base 2 is fixedly mounted on the upper surface of the working platform 1, serving as the mounting support structure for the particle emission base 3. The equipment base 2 has a mounting boss on the side facing the particle beam emission, and the particle emission base 3 is fixed to this mounting boss. The particle emission base 3 is the core emission component of the particle beam distribution equipment, and its end is an emission end with several precision micro-holes. These micro-holes are the only exit points for the particle beam, and their straightness and cleanliness directly affect the emission direction and accuracy of the particle beam. The protective outer cover 4 is a hollow cover with one open end, facing the equipment base 2 and fitted over the outside of the particle emission base 3, forming a closed protective cavity outside the particle emission base 3. Figure 2The protective cover 4 shown is fixed with several magnetic core posts 42 on one end face near the equipment base 2. The magnetic core posts 42 are evenly distributed circumferentially along the opening end of the protective cover 4. Each magnetic core post 42 is fitted with a metal ring 21 on its outer wall. The metal ring 21 is made of magnetically conductive material. A groove is opened on one side of the equipment base 2 corresponding to the position of the metal ring 21. The metal ring 21 is embedded in the groove. By means of the magnetic attraction between the magnetic core post 42 and the metal ring 21, the protective cover 4 and the equipment base 2 are detachably fixedly connected. This connection method uses the magnetic attraction force to ensure the fit and sealing of the protective cover 4 and the equipment base 2 after connection. At the same time, no additional fasteners are required. The protective cover 4 can be directly pulled out to disassemble and assemble, which facilitates the later maintenance of the interior of the protective cover 4 and the particle emission base 3.

[0043] The top outer wall of the protective cover 4 is fixedly equipped with, for example, Figure 3 The guide bracket 5 shown is a U-shaped frame structure with a sliding cavity inside that matches the baffle plate 6. This provides precise guidance and constraint for the lifting and lowering movement of the baffle plate 6, preventing it from shifting or jamming during lifting. The baffle plate 6 is a rigid plate structure, preferably made of tungsten, and is slidably disposed within the sliding cavity of the guide bracket 5. It can move vertically up and down. The top of the protective cover 4 has a positioning slot 41, the size of which matches the size of the baffle plate 6. The bottom end of the baffle plate 6 can extend through the positioning slot 41 into the interior of the protective cover 4, achieving complete shielding of the emission end of the particle emission base 3. Two sets of guide rollers 51 are fixedly installed on the top of the guide bracket 5. The two sets of guide rollers 51 are respectively located on both sides of the top of the guide bracket 5. The middle section of the traction rope 7 overlaps on the guide rollers 51. The rolling friction of the guide rollers 51 replaces the sliding friction between the traction rope 7 and the guide bracket 5, reducing the frictional resistance when the traction rope 7 moves and ensuring the smooth transmission of force on the traction rope 7. The traction rope 7 is preferably made of monocrystalline silicon material with extremely strong tensile strength but extremely poor shear strength. One end passes through the guide bracket 5 and connects to the top of the guard plate 6. The other end is fixed to the upper surface of the working platform 1 by fastening screws 8. The fastening screws 8 are fixed to the working platform 1 by threaded connection, realizing the firm fixation of the end of the traction rope 7, so that the traction rope 7 always forms an upward tensile constraint on the guard plate 6, keeping the guard plate 6 in an upward, ready-to-be-blocked state. When the equipment base 2 undergoes unexpected displacement on the working platform 1 due to factors such as earthquakes or fatigue sagging of the support, the traction rope 7 will be subjected to lateral pulling force. When the pulling force exceeds the tensile strength limit of the traction rope 7 itself, the traction rope 7 will break. The guard plate 6 will then lose the tension constraint of the traction rope 7 and descend vertically along the sliding cavity of the guide bracket 5 under its own gravity. Finally, it will pass through the positioning slot 41 and extend into the protective cover 4, forming a shield for the emitting end of the particle emission base 3, thus preventing the particle beam from shifting in emission direction due to equipment misalignment and causing a safety accident.

[0044] Two connecting pipes 9 are fixed to the left and right outer walls of the protective cover 4 respectively. The connecting pipe 9 is a hollow fluid transport channel. Its bottom end is connected to an external air pump through a pipe to provide a passage for gas transport. Several inclined spray nozzles 10 are connected to the outer wall of the connecting pipe 9. The air outlet of the spray nozzle 10 is away from the connecting pipe 9 and extends into the positioning slot 41, so that the air jet direction of the spray nozzle 10 is more in line with the emission end of the particle emission base 3. After the external air pump delivers dry gas into the connecting pipe 9, the gas is split through the connecting pipe 9 and ejected from each nozzle 10. With the help of the inclined setting of the nozzle 10, the ejected gas forms an annular air curtain in front of the emitting end of the particle emitting base 3. This air curtain forms a physical barrier by utilizing the flow of gas, which can effectively prevent dust, water mist and other impurities in the outside air from contacting the emitting end of the particle emitting base 3, avoiding impurities from adhering to the surface of the emitting end or entering the precision micropores, thus ensuring the accuracy of particle beam emission. At the same time, the dry gas can also prevent condensation from appearing at the emitting end of the particle emitting base 3, avoiding moisture and oxidation of the components.

[0045] The outer wall of the baffle plate 6 is embedded with a rubber bladder 61. The rubber bladder 61 is an elastic hollow structure and is U-shaped. The interior of the rubber bladder 61 is a hollow cavity filled with tungsten sand fluid, preferably a mixture of high-density tungsten sand and damping silicone oil, which has good fluidity. When the baffle plate 6 is in the rising, shielding state, the tungsten sand fluid falls under its own gravity and gathers in the bottom cavity of the rubber bladder 61, causing the center of gravity of the baffle plate 6 to shift downward. This allows the baffle plate 6 to descend more smoothly along the guide bracket 5 after losing its tension constraint, improving the descent response speed. When the baffle plate 6 descends to the position that shields the emitting end of the particle emission base 3, the bottom end of the baffle plate 6 contacts the inner bottom wall of the protective cover 4. The pressure generated by the contact is transmitted to the rubber bladder 61, causing the tungsten sand fluid to move upward within the cavity of the rubber bladder 61 and fill the cavities on both sides of the rubber bladder 61. The filling of the tungsten sand fluid causes the two sides of the rubber bladder 61 to expand outward, tightly fitting against the inner wall of the protective cover 4, eliminating the gap between the baffle plate 6 and the protective cover 4, improving the sealing performance of the shielding, and preventing the particle beam from leaking from the gaps.

[0046] The micropore cleaning component is located inside the baffle plate 6 and can cooperate with the gas ejected from the nozzle 10 to achieve deep cleaning of the micropores at the emitting end of the particle emitting base 3, such as... Figure 6As shown, the component includes a rectangular groove 62 formed on the side of the baffle plate 6 facing the emitting end of the particle emitting base 3. The rectangular groove 62 provides sliding space for the sliding substrate 64, which is slidably disposed within the rectangular groove 62 and can reciprocate horizontally along the groove direction. Several tension springs I 65 are fixedly provided between the sliding substrate 64 and the bottom of the rectangular groove 62. The tension springs I 65 provide elastic restoring force for the sliding substrate 64. Under normal conditions, the tension springs I 65 are in a naturally extended state, causing the sliding substrate 64 to move closer to the side of the rectangular groove 62. After the baffle plate 6 descends, the opening of the rectangular groove 62 corresponds to the air curtain formed by the jet nozzle 10, and the airflow of the air curtain can be directly blown into the interior of the rectangular groove 62. Figure 7 As shown, a plurality of rotating shafts 67 are rotatably provided through one side of the sliding substrate 64. The number of rotating shafts 67 corresponds one-to-one with the number of micro-holes at the emitting end of the particle emitting base 3. One end of the rotating shaft 67 extends into the interior of the rectangular groove 62, and a plurality of guide vanes 68 are fixedly provided on its outer wall. The guide vanes 68 are evenly distributed along the circumference of the rotating shaft 67 and can drive the rotating shaft 67 to rotate under the impact of the airflow. The other end of the rotating shaft 67 passes through the sliding substrate 64 and extends to the outside of the baffle plate 6. A cleaning brush 611 is fixedly provided at its end. A cleaning brush is provided on one side of the baffle plate 6. The brush 611 has a through hole that provides a channel for the extension of the cleaning brush 611, allowing the cleaning brush 611 to pass through the through hole and contact the micropores at the emitting end of the particle emitting base 3. The bottom end of the connecting pipe 9 on one side is connected to an external vacuum cleaner through a pipe. The rotating shaft 67 has a hollow structure, and a through hole is opened on the outer wall of the end near the cleaning brush 611. During operation, gas enters through the connecting pipe 9 on one side, while the air inlet valve of the connecting pipe 9 on the other side is closed, and the valve connected to the external vacuum cleaner is opened for suction. With air intake on one side and exhaust on the other, dust can be discharged.

[0047] The bottom of the baffle plate 6 is provided with a plug hole 63, which is connected to the rectangular groove 62. The bottom wall of the protective cover 4 is fixed with a wedge block 43 that is adapted to the plug hole 63. The wedge block 43 has a wedge structure and can be gradually inserted into the plug hole 63 as the baffle plate 6 descends. As the baffle plate 6 descends vertically, the wedge block 43 gradually inserts into the insertion hole 63. Its wedge-shaped inclined surface contacts the bottom of the sliding base plate 64 and generates a horizontal thrust on the sliding base plate 64, converting the vertical downward movement of the baffle plate 6 into the horizontal forward movement of the sliding base plate 64. This pushes the sliding base plate 64 to slide along the rectangular groove 62 away from the bottom of the groove. At this time, the tension spring I 65 is stretched and accumulates elastic potential energy. The sliding of the sliding base plate 64 will drive the rotating shaft 67 and the cleaning brush 611 to move synchronously towards the emitting end of the particle emitting base 3. Finally, several cleaning brushes 611 are inserted one by one into the precision micro-holes of the emitting end of the particle emitting base 3 to achieve the initial cleaning of the micro-holes. A flow guide cover 69, coaxial with the rotating shaft 67, is fixedly provided on one side of the sliding base plate 64. The flow guide cover 69 is a hollow cover with one end open. All the flow guide blades 68 are located inside the flow guide cover 69. A flow guide baffle 610 corresponding to the flow guide cover 69 is also fixedly provided on one side of the sliding base plate 64. The flow guide cover 69 and the flow guide baffle 610 cooperate with each other to guide the airflow blown into the rectangular groove 62, so that the airflow is concentrated and blown into the flow guide blades 68, thereby increasing the impact driving force of the airflow on the flow guide blades 68 and driving the flow guide blades 68 to rotate rapidly around the axis of the rotating shaft 67. This, in turn, drives the rotating shaft 67 and the cleaning brush 611 to rotate synchronously. The rotating cleaning brush 611 can perform rotational wiping inside the micropores to thoroughly clean out the tiny impurities attached inside the micropores. The cleaned impurities will be carried out of the protective cover 4 by the airflow of the air curtain in time, completing the deep cleaning of the micropores.

[0048] like Figure 5 The device shown also includes an emergency triggering component housed within the guide bracket 5, which enables the baffle 6 to rapidly descend and block the particle beam emitted by the equipment, thus improving the safety of the equipment. The emergency triggering component includes a connecting support 11, which is disposed within the sliding cavity of the guide bracket 5. Two sliding rods I 52 are fixedly mounted on the top wall of the guide bracket 5, and the two sliding rods I 52 are parallel to each other. Figure 8As shown, the top of the guard plate 6 has a mounting through hole 612 that matches the sliding rod I 52. The bottom end of the sliding rod I 52 is slidably disposed in the mounting through hole 612, providing dual guiding constraints for the lifting and lowering of the guard plate 6 and the connecting support 11. A compression spring 613 is disposed in the mounting through hole 612. The compression spring 613 is sleeved on the outer wall of the sliding rod I 52, and its two ends abut against the bottom wall of the mounting through hole 612 and the bottom of the sliding rod I 52, respectively. Under normal conditions, the compression spring 613 is always in a compressed state, accumulating elastic restoring force to provide power for the rapid descent of the guard plate 6. The connecting support 11 is slidably sleeved on the two sliding rods I 52, and can slide vertically along the axis of the sliding rods I 52. The end of the traction rope 7 near the guard plate 6 is fixedly connected to the connecting support 11, so that the tension of the traction rope 7 is smoothly transmitted to the guard plate 6 through the connecting support 11. A magnetic attraction mechanism 12 is provided on one side of the guard plate 6, which engages with the connecting support 11. Through the engaging action of the magnetic attraction mechanism 12, the connecting support 11 and the guard plate 6 are fixedly connected, so that the guard plate 6 is kept in the rising state. An ionization chamber-type beam monitoring sensor is fixedly installed on one inner wall of the protective cover 4. This sensor can detect the ionization signal inside the protective cover 4 in real time to determine whether there is an accidental emission of the particle beam. When an accidental emission of the particle beam is detected, the sensor will immediately send an electrical signal to trigger the magnetic attraction mechanism 12 to disconnect the connection between the connecting support 11 and the baffle plate 6. The baffle plate 6 will then descend rapidly under the elastic restoring force of the compression spring 613, thereby achieving emergency shielding of the emission end of the particle emission base 3 and preventing the particle beam leakage from causing safety problems.

[0049] like Figure 4The magnetic attraction mechanism 12 shown includes two sliding supports 121 fixed to one side of the baffle plate 6. The two sliding supports 121 are parallel to each other and each has a sliding hole inside. A sliding rod II 122 is slidably inserted through the sliding hole of the two sliding supports 121. The sliding supports 121 provide guidance for the sliding of the sliding rod II 122, so that the sliding rod II 122 can slide linearly in the horizontal direction. A connecting sleeve 124 is slidably sleeved on the outer wall of one end of the sliding rod II 122. The connecting sleeve 124 is fixed to one side of the baffle plate 6. An electromagnet block II 126 is fixedly installed on the inner wall of one end of the connecting sleeve 124. An electromagnet block I 125 that works with the electromagnet block II 126 is fixedly installed at the corresponding end of the sliding rod II 122. A tension spring II 127 is installed inside the connecting sleeve 124. The two ends of the tension spring II 127 are fixedly connected to the adjacent ends of the electromagnet block II 126 and the electromagnet block I 125, respectively. Under normal conditions, the tension spring II 127 is in a naturally extended state. Pulling the electromagnet block I 125 and the electromagnet block II 126 together attracts and adheres to each other, so that the sliding rod II 122 remains in a fixed state. Two snap-fit ​​seats 128 are fixedly provided on one side of the connecting support 11. A snap-fit ​​groove is provided on one side of the snap-fit ​​seat 128. A snap-fit ​​block 123 is inserted into the snap-fit ​​groove. The snap-fit ​​block 123 is fixed to the top of the sliding rod II 122. Through the snap-fit ​​cooperation between the snap-fit ​​block 123 and the snap-fit ​​seat 128, the connecting support 11 and the guard plate 6 are firmly snapped together. When the ionization chamber beam monitoring sensor does not detect an unexpected particle beam emission and continues to send an electrical signal, electromagnet blocks I 125 and II 126 will be energized simultaneously. After being energized, the magnetic poles of their opposite surfaces become the same, generating a repulsive electromagnetic force. This repulsive force will overcome the tension of the tension spring II 127 and push the sliding rod II 122 to slide along the sliding support 121 away from the connecting sleeve 124. The sliding of the sliding rod II 122 will drive the locking block 123 to move synchronously, so that the locking block 123 is inserted into the locking groove of the locking seat 128, realizing the locking of the magnetic attraction mechanism 12 and the connecting support 11. Conversely, when an unexpected particle beam emission is detected, electromagnet blocks I 125 and II 126 will be de-energized simultaneously, realizing the disconnection of the connecting support 11 and the baffle plate 6.

[0050] A scraper 66 is embedded at the bottom of the side of the baffle plate 6 near the particle emission base 3. The scraper 66 is made of elastic material and its wiping surface protrudes from the side wall of the baffle plate 6. When the baffle plate 6 descends vertically, the scraper 66 will first come into contact with the emission end surface of the particle emission base 3. As the baffle plate 6 continues to descend, the scraper 66 will make a vertical scraping motion along the emission end surface of the particle emission base 3. Utilizing its elastic properties, it will fit tightly with the emission end surface to thoroughly clean the floating dust and impurities attached to the emission end surface, preventing impurities from accumulating on the emission end surface. At the same time, the elastic material scraper 66 can effectively avoid scratching the precision surface of the emission end of the particle emission base 3. The impurities after scraping will be promptly carried out of the protective cover 4 by the air curtain airflow sprayed by the spray nozzle 10, and together with the cleaning brush 611, it can achieve a comprehensive cleaning of the emission end surface and micropores of the particle emission base 3.

[0051] This device also includes a PLC controller (not shown), which is electrically connected to the ionization chamber beam monitoring sensor, electromagnet I 125, electromagnet II 126, external air pump, and external vacuum cleaner. The PLC controller has preset control logic to coordinate the timing actions of each component. Specifically, when the device starts, the PLC controller controls the external air pump to start and generate an air curtain; when an unexpected particle beam emission is detected, the PLC controller receives the signal from the ionization chamber beam monitoring sensor and controls the electromagnet I 125 and electromagnet II 126 to be de-energized; when performing micropore cleaning, the PLC controller controls the air inlet valve of one side of the connecting pipe 9 to open and the air inlet valve of the other side of the connecting pipe 9 to close, while simultaneously controlling the external vacuum cleaner to start suction.

[0052] When the equipment is operating normally, the protective cover 4 is fixed to the equipment base 2 by the magnetic attraction between the magnetic core column 42 and the metal ring 21, forming a protective layer on the outside of the particle emission base 3. An external air pump continuously supplies dry gas to the connecting pipe 9, and the gas is sprayed out at an angle through the nozzle 10, forming an annular air curtain in front of the emission end of the particle emission base 3. The physical barrier effect of the air curtain prevents external impurities from contacting the emission end, while the dry gas prevents condensation and oxidation at the emission end, ensuring the accuracy of the particle beam emission. At this time, the baffle plate 6 is kept in an upward state under the tension constraint of the traction rope 7, the magnetic attraction mechanism 12 realizes the snap-fit ​​fixation between the connecting support 11 and the baffle plate 6, the compression spring 613 is in a compressed and energy-storing state, and the micropore cleaning component and the scraper plate 66 are both in a ready-to-work state.

[0053] When the equipment base 2 undergoes unexpected lateral displacement on the working platform 1 due to factors such as earthquakes or support fatigue, the pulling force on the traction rope 7 exceeds its tensile limit and breaks. After the baffle plate 6 loses its tensile constraint, it descends vertically along the sliding cavity of the guide bracket 5 under its own gravity, passes through the positioning slot 41 and enters the interior of the protective cover 4, forming a shield for the emitting end of the particle emission base 3. When the baffle plate 6 descends to the bottom wall of the protective cover 4, the tungsten sand fluid in the rubber bladder 61 fills the cavities on both sides under pressure, so that the rubber bladder 61 fits tightly against the inner wall of the protective cover 4, improving the shielding and sealing performance.

[0054] If an unexpected particle beam emission occurs during normal operation of the equipment, the ionization chamber beam monitoring sensor on the inner wall of the protective cover 4 will detect the ionization signal and send an electrical signal, triggering the magnetic attraction mechanism 12 to operate. After the electromagnet blocks I 125 and II 126 are de-energized, they push the sliding rod II 122 to slide, causing the locking block 123 to disengage from the locking seat 128, thus releasing the connection between the connecting support 11 and the baffle plate 6. The baffle plate 6 then descends rapidly under the elastic restoring force of the compression spring 613, achieving emergency shielding of the emitting end of the particle emission base 3 and preventing particle beam leakage.

[0055] When the baffle plate 6 descends under the action of gravity or compression spring 613, the scraper plate 66 first contacts the surface of the particle emission base 3, and performs a scraping motion as the baffle plate 6 descends to clean the floating dust and impurities on the surface of the emission end; at the same time, the wedge block 43 is inserted into the insertion hole 63, pushing the sliding plate 64 to slide in the rectangular groove 62, driving the cleaning brush 611 to insert into the micro-hole of the emission end; the airflow ejected from the spray nozzle 10 is guided by the guide cover 69 and the guide baffle 610, and then concentrates to impact the guide vane 68, driving the rotating shaft 67 and the cleaning brush 611 to rotate and wipe the inside of the micro-hole, cleaning the tiny impurities inside the micro-hole; all the impurities scraped and wiped out are promptly carried out of the protective cover 4 by the airflow of the air curtain and the suction airflow, realizing the synchronous and comprehensive cleaning of the surface of the emission end of the particle emission base 3 and the micro-hole during the shielding process.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automatic protective device for tumor particle beam distribution equipment, characterized in that, A device base (2) is fixedly mounted on the work platform (1). A particle emission base (3) with a precision micro-hole at the emission end is fixedly installed on the device base (2). A protective cover (4) is detachably connected to the device base (2) on the particle emission base (3). A guide bracket (5) with a sliding cavity inside is fixedly installed on the top outer wall of the protective cover (4). A baffle plate (6) that can be raised and lowered in the vertical direction to block the emission end of the particle emission base (3) is slidably installed in the sliding cavity of the guide bracket (5). A traction rope (7) is connected to the baffle plate (6). The other end of the traction rope (7) is fixed to the work platform (1) by a fastening screw (8). When the device base (2) moves unexpectedly, the traction rope (7) breaks, and the baffle plate (6) descends by gravity. The emergency triggering component at the connection between the guide bracket (5) and the baffle plate (6) includes a connecting support (11) inside the guide bracket (5). Two sliding rods I (52) are fixedly provided on the top wall of the guide bracket (5). An installation through hole (612) is opened on the top of the baffle plate (6). The bottom end of the sliding rod I (52) is slidably provided in the installation through hole (612). A compression spring (613) is provided in the installation through hole (612). The connecting support (11) is slidably sleeved on the sliding rod I (52). One end of the traction rope (7) near the baffle plate (6) is fixedly connected to the connecting support (11). An ionization chamber type beam monitoring sensor is fixedly provided on the inner wall of the protective cover (4). When an unexpectedly emitted particle is detected, the magnetic attraction mechanism (12) used for electromagnetic connection between the guide bracket (5) and the baffle plate (6) is triggered to cut off the connection. The baffle plate (6) descends rapidly under the action of the compression spring (613).

2. The automatic protection device for tumor particle beam distribution equipment according to claim 1, characterized in that, The magnetic attraction mechanism (12) includes two sliding supports (121) fixed to one side of the guard plate (6). A sliding rod II (122) is slidably provided through the two sliding supports (121). A connecting sleeve (124) is sleeved on the outer wall of one end of the sliding rod II (122). An electromagnet block II (126) is fixed on the inner wall of the connecting sleeve (124). An electromagnet block I (125) is fixed on one end of the sliding rod II (122). A tension spring II (127) is provided inside the connecting sleeve (124). Two snap-fit ​​seats (128) are fixed on one side of the connecting support (11). A snap-fit ​​block (123) fixed to the top of the sliding rod II (122) is inserted into the snap-fit ​​seat (128). When the power is on, the electromagnet block repels and pushes the snap-fit. When the power is off, the tension spring pulls it away.

3. The automatic protection device for tumor particle beam distribution equipment according to claim 1, characterized in that, Connecting pipes (9) are fixedly installed on both sides of the protective cover (4); a positioning slot (41) is opened on the top of the protective cover (4) to facilitate the passage of the baffle plate (6). Multiple spray nozzles (10) connected on the connecting pipe (9) extend into the positioning slot (41) of the protective cover (4), and dry gas is sprayed out through the spray nozzles (10) to form an air curtain to block impurities.

4. The automatic protection device for tumor particle beam distribution equipment according to claim 1, characterized in that, The protective cover (4) is fixed with a plurality of magnetic core columns (42) at one end near the equipment base (2). The outer wall of the magnetic core column (42) is fitted with a metal ring (21). The plurality of metal rings (21) are embedded on one side of the equipment base (2). The protective cover (4) is attached and fixed to the equipment base (2) by magnetic attraction.

5. The automatic protection device for tumor particle beam distribution equipment according to claim 2, characterized in that, The top of the guide bracket (5) is fixed with two sets of guide rollers (51), and the middle section of the traction rope (7) is attached to the guide rollers (51) to reduce the movement resistance of the traction rope (7) through rolling friction.

6. The automatic protection device for tumor particle beam distribution equipment according to claim 3, characterized in that, The outer wall of the baffle plate (6) is embedded with a U-shaped rubber bladder (61). The rubber bladder (61) is filled with tungsten sand fluid. When the baffle plate (6) rises, the tungsten sand fluid falls and the center of gravity shifts downward. After the baffle plate (6) descends and blocks the view, the tungsten sand fluid is compressed and fills both sides of the rubber bladder (61), so that the rubber bladder (61) fits and seals against the inner wall of the protective cover (4).

7. The automatic protection device for tumor particle beam distribution equipment according to claim 6, characterized in that, The baffle plate (6) is provided with a micropore cleaning component that works with the air curtain to clean the micropores at the emission end of the particle emission base (3). The micropore cleaning component includes a rectangular groove (62) opened on one side of the baffle plate (6). A sliding base plate (64) is slidably provided in the rectangular groove (62). Multiple tension springs I (65) are fixed between the sliding base plate (64) and the baffle plate (6). Multiple rotating shafts (67) are rotatably provided through one side of the sliding base plate (64). A guide vane (68) is fixed on the outer wall of one end of the rotating shaft (67), and a cleaning brush (611) is fixed on the other end. After the baffle plate (6) is lowered, the rectangular groove (62) corresponds to the air curtain. The airflow drives the guide vane (68) to drive the cleaning brush (611) to rotate and clean the micropores.

8. The automatic protection device for tumor particle beam distribution equipment according to claim 7, characterized in that, The bottom of the baffle plate (6) is provided with a plug hole (63), and the bottom wall of the protective cover (4) is fixed with a wedge block (43) that matches the plug hole (63). When the baffle plate (6) descends, the wedge block (43) is inserted into the plug hole (63), and the sliding base plate (64) is pushed to drive the cleaning brush (611) to be inserted into the micropore of the particle emission base (3).

9. The automatic protection device for tumor particle beam distribution equipment according to claim 8, characterized in that, The sliding base plate (64) is fixedly provided with a flow guide cover (69) coaxial with the rotating shaft (67), and the flow guide blade (68) is located inside the flow guide cover (69). The sliding base plate (64) is also fixedly provided with a flow guide baffle (610) corresponding to the flow guide cover (69). The two work together to concentrate the airflow and guide it to the flow guide blade (68).

10. The automatic protection device for tumor particle beam distribution equipment according to claim 9, characterized in that, The bottom end of the baffle plate (6) near the particle emission base (3) is fitted with a scraper (66) made of elastic material. When the baffle plate (6) descends, the scraper (66) first contacts the emission end surface of the particle emission base (3) and scrapes away floating dust and impurities.

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