阅读说明：本技术 一种电子束辐照货物保护装置以及辐照保护方法 (Electron beam irradiation cargo protection device and irradiation protection method ) 是由 王俏珍 黄晓锋 汪恩锋 唐昌 于 2021-07-26 设计创作，主要内容包括：本发明公开一种电子束辐照货物保护装置以及辐照保护方法,涉及电子束辐照设备技术领域,旨在解决电子束辐照设备在启停过程中辐照剂量无法均匀控制的问题,其技术方案要点是：包括用于发射电子束的辐照盒,还包括保护板和驱动机构,所述保护板设置于辐照盒的发射端,能够在展开位置和收起位置之间运动；在展开位置,保护板遮挡于辐照盒的发射端与货物之间；在收起位置,辐照盒的发射端朝货物方向敞开；所述驱动机构用驱动保护板在展开位置和收起位置之间运动。本发明解决了重启时电子束辐照设备升频过程中,在电子束下货物辐照吸收剂量均匀的问题。(The invention discloses an electron beam irradiation cargo protection device and an irradiation protection method, relates to the technical field of electron beam irradiation equipment, and aims to solve the problem that irradiation dose of the electron beam irradiation equipment cannot be uniformly controlled in the starting and stopping process, and the technical scheme is as follows: the electron beam irradiation device comprises an irradiation box for emitting electron beams, a protection plate and a driving mechanism, wherein the protection plate is arranged at an emitting end of the irradiation box and can move between an expansion position and a retraction position; in the unfolding position, the protection plate is shielded between the emitting end of the irradiation box and the goods; in the retracted position, the emission end of the irradiation box is open towards the goods; the drive mechanism drives the protective panel between the deployed position and the stowed position. The invention solves the problem that the irradiation absorbed dose of goods under the electron beam is uniform in the frequency increasing process of the electron beam irradiation equipment during restarting.)

1. The electron beam irradiation cargo protection device is characterized by comprising a protection plate (4) and a driving mechanism (6), wherein the protection plate (4) is arranged at the emitting end of an irradiation box (1) and can move between a spreading position and a retracting position; in the unfolding position, the protection plate (4) is shielded between the emission end of the irradiation box (1) and the goods (17); in the retracted position, the emission end of the irradiation box (1) is open in the direction of the goods (17); the drive mechanism (6) moves between a deployed position and a stowed position with the drive protection plate (4).

2. An electron beam irradiation cargo protection device according to claim 1, characterized in that the protection plate (4) is a lead plate, the upper side of which is covered with high lead optical glass.

3. An electron beam irradiation cargo protection device according to claim 1, wherein the protection plate (4) is in the extended position before the power of the electron beam reaches a stable value; after the power of the electron beam reaches a stable value, the protection plate (4) is in the retracted position.

4. An electron beam irradiation cargo protection device according to claim 3, characterized in that the protection device further comprises a reserve power supply for powering the drive mechanism (6).

5. The cargo protection device for electron beam irradiation as claimed in claim 4, wherein one end of the protection plate (4) is rotatably connected to the lower part of the irradiation box (1) through a rotating bracket (5), and the other end of the protection plate (4) is driven to rotate through a driving mechanism (6).

6. The cargo protection device for electron beam irradiation as claimed in claim 5, wherein the driving mechanism (6) is a linear actuator, the fixed end of the linear actuator is rotatably connected to the irradiation box (1), and the driving end (11) is rotatably connected to the other end of the protection plate (4).

7. An electron beam irradiation cargo protection device according to claim 1, wherein the protection plate (4) is arranged below the emission end of the irradiation box (1), and the protection plate (4) is slidable between a deployed position and a stowed position.

8. The cargo protection device for electron beam irradiation of claim 7, wherein the driving mechanism (6) is a linear driver, the linear driver is fixedly installed at the lower part of the irradiation box (1), and the protection plate (4) is fixedly connected to the driving end (11) of the linear driver.

9. The electron beam irradiation cargo protection device according to claim 7, wherein the irradiation box (1) is provided with slide rails (7) on two sides, the protection plate (4) is provided with sliding members (8) on two sides, and the protection plate (4) can slide along the slide rails (7) through the sliding members (8); the slide way (12) of the slide rail (7) comprises a horizontal section (14), an inclined section (15) and a vertical section (16) which are sequentially connected, the slide way (12) moves upwards from the horizontal section (14) to the vertical section (16), and the inclined section (15) is connected between the tail end of the horizontal section (14) and the lower end of the vertical section (16); when the sliding plate slides to the horizontal section (14), the protection plate (4) is shielded between the transmitting end and the goods (17); when sliding to the vertical section (16), the protective plate (4) is moved out from between the launch end and the goods (17), the launch end being open towards the goods (17).

10. A radiation protection method, characterized in that, by using the protection device as claimed in claims 1-9, when the electron beam irradiation device is working normally, the irradiation power is at a stable value, the protection plate (4) is at the retracted position, and the emission end of the irradiation box (1) is open towards the goods (17); when the electron beam irradiation device is in emergency shutdown, irradiation is stopped, then the driving mechanism (6) drives the protection plate (4) to move to the unfolding position, and the protection plate (4) is shielded between the emitting end of the irradiation box (1) and the direction of goods (17); after the electron beam irradiation device is restarted, the irradiation power is increased, and the protection plate (4) is positioned at the unfolding position; until the irradiation power reaches a stable value, the driving mechanism (6) drives the protection plate (4) to move to the unfolding position, and the emitting end of the irradiation box (1) is opened towards the goods (17).

Technical Field

The invention relates to irradiation equipment, in particular to an electron beam irradiation cargo protection device and an irradiation protection method.

Background

Radiation processing, which means that the energy of electron rays generated by an electron accelerator or gamma rays generated by radioactive isotopes is transferred to an irradiated substance, ionizing radiation acts on the irradiated substance to generate ionization and excitation, orbital electrons are released to form free radicals, and the physical properties and chemical compositions of the irradiated substance are changed by controlling radiation conditions, so that the irradiated substance can become a new substance required by people, or organisms (microorganisms and the like) are irrecoverably damaged and changed to achieve the required targets of people, and the radiation processing is widely applied to the fields of food, medical treatment, chemical industry, mineral production and the like.

When the electron beam irradiates, strict control and requirements are provided for irradiation dose, irradiation time and the like so as to stably achieve the irradiation purpose, and when the electron beam irradiates goods and meets emergency shutdown, irradiation interruption is formed, at the moment, the goods are partially irradiated, the rest is not irradiated, the irradiation absorption dose is not uniform, the irradiation effect is influenced, for example, the irradiation absorption dose of agricultural products is not uniform, so that worm eggs in the goods cannot be killed, and the harmful effect is caused on the health of consumers; the medical instrument has uneven radiation absorbed dose, which causes bad sterilization effect, residual harmful bacteria, potential risk to human body and other bad effects; moreover, after the equipment is restarted, the irradiation dose gradually increases, and can reach a preset value (namely a stable value) after a period of time, so that the uniformity of the irradiation dose of the goods is difficult to control, the goods can be damaged or the irradiation cannot reach the standard, personnel are required to enter the electron beam in advance to separate the goods, the use is inconvenient, and the stability of irradiation production and processing is influenced.

Therefore, a new solution is needed to solve this problem.

Disclosure of Invention

The invention aims to solve the problems, and provides an electron beam irradiation cargo protection device, which solves the problem that during the frequency increasing process of electron beam irradiation equipment during restarting, the irradiation absorption dose of cargoes under electron beams is uniform, and the irradiation effect of cargoes is influenced.

The technical purpose of the invention is realized by the following technical scheme:

the electron beam irradiation cargo protection device comprises a protection plate and a driving mechanism, wherein the protection plate is arranged at the emitting end of an irradiation box and can move between a spreading position and a retracting position; in the unfolding position, the protection plate is shielded between the emitting end of the irradiation box and the goods; in the retracted position, the emission end of the irradiation box is open towards the goods; the drive mechanism drives the protective panel between the deployed position and the stowed position.

The invention is further provided that the protective plate is a lead plate, and the upper side of the lead plate is covered with high-lead optical glass.

The invention is further arranged that the protection plate is in the extended position before the power of the electron beam reaches a stable value; and after the power of the electron beam reaches a stable value, the protection plate is in the retracted position.

The invention is further provided in that the protective device further comprises a reserve power supply for supplying power to the drive mechanism.

The invention is further provided that one end of the protection plate is rotationally connected to the lower part of the irradiation box through a rotating bracket, and the other end of the protection plate is driven to rotate through a driving mechanism.

The invention is further arranged in that the driving mechanism is a linear driver, the fixed end of the linear driver is rotatably connected to the irradiation box, and the driving end is rotatably connected with the other end of the protection plate.

The invention further provides that the protection plate is arranged below the emission end of the irradiation box, and the protection plate can slide between the unfolding position and the folding position.

The invention is further configured that the driving mechanism is a linear driver, the linear driver is fixedly mounted at the lower part of the irradiation box, and the protection plate is fixedly connected to the driving end of the linear driver.

The invention is further provided that two sides of the irradiation box are provided with slide rails, two sides of the protection plate are provided with sliding parts, and the protection plate can slide along the slide rails through the sliding parts; the slideway of the sliding rail comprises a horizontal section, an inclined section and a vertical section which are sequentially connected, the slideway is upward from the horizontal section to the vertical section, and the inclined section is connected between the tail end of the horizontal section and the lower end of the vertical section; when the sliding plate slides to the horizontal section, the protection plate is shielded between the transmitting end and the goods; when sliding to vertical section, the protection shield shifts out from between emission end and goods, and the emission end is opened towards the goods.

The invention is further arranged in that the sliding parts at two sides of the protection plate comprise a first guide pulley and a second guide pulley, the first guide pulley is positioned at one side of the second guide pulley, which is far away from the vertical end, and the driving end of the driving mechanism is abutted against the part of the first guide pulley, which extends out of the slide way, and is used for pushing and pushing the first guide pulley to move towards the direction of the inclined section in the horizontal section.

The invention is further provided that the upper end of the vertical section is provided with a locking mechanism, and the locking mechanism is used for locking the second guide pulley so as to maintain the protection plate in a state that the emission end is opened towards the goods.

The invention is further arranged in that the locking mechanism comprises a locking block, a locking spring I and an electromagnet, opposite locking grooves are formed in two sides of the vertical section, two ends of the locking block respectively extend into the locking grooves in the two sides, a downward locking recess is formed in the position, corresponding to the slide way, of the locking block, the locking recess is used for accommodating the locking recess of the guide pulley II, the locking spring I is used for elastically maintaining the locking recess of the locking block to be right opposite to the slide way, and the electromagnet is used for driving the locking block to slide into the locking groove, so that the side wall of the locking groove blocks the locking recess.

The cross section of the locking recess is in a right-angle trapezoid shape and comprises a downward opening, an upper bottom surface, two side inclined surfaces and a vertical surface, the inclined surfaces are located on the side away from the magnetic adsorption of the electromagnet, and the guide pulley II is pressed against the bottom surface, the inclined surfaces and the vertical surface when being sunk into the locking recess.

The invention is further arranged in that the locking mechanism further comprises a locking sleeve, the locking block is arranged in the locking sleeve, two sides of the locking sleeve are connected in the locking groove in a sliding mode, a locking spring is elastically pressed between the bottom surface of the locking groove and the outer wall of the locking sleeve, the electromagnet is positioned in the locking groove on the other side, and the locking sleeve is made of magnetic materials.

The invention is further provided that the locking block slides up and down in the locking sleeve, and the upper part of the locking block elastically supports and presses the locking spring II.

The invention is further provided that one end of the horizontal section, which is far away from the inclined section, is provided with a buffer mechanism, the buffer mechanism comprises a buffer rod and a buffer seat, a first buffer slide block is connected in an inner cavity of the buffer seat in a sliding manner, one side, which is far away from the sliding chute, of the first buffer slide block is elastically supported through an elastic component, one end of the buffer rod is fixedly connected with the first buffer slide block, and the other end of the buffer rod penetrates through a buffer sliding sleeve in the buffer seat and extends into the horizontal section of the sliding way to be used for abutting against a first buffer guide pulley.

The elastic assembly further comprises a second buffer sliding block and a third buffer sliding block, the second buffer sliding block is abutted against the third buffer sliding block, a first buffer spring is elastically abutted between the second buffer sliding block and the first buffer sliding block, and a second buffer spring is abutted between the third buffer sliding block and the bottom surface of the inner cavity of the buffer seat.

The invention is further arranged in such a way that a conical bulge is arranged on one side of the buffer slide block III facing the buffer slide block II, a conical recess which is mutually sleeved with the conical bulge is arranged on one side of the buffer slide block II facing the buffer slide block III, the profile of the conical bulge is slightly larger than that of the conical recess, and the outer side of the buffer slide block II is in sliding fit with the inner cavity wall of the buffer seat.

The invention is further provided that a third buffer spring is elastically pressed between the top of the conical bulge and the bottom of the conical recess, and the top of the conical bulge is provided with a containing cavity for partially containing the third buffer spring.

The invention is further set up in that the upper and lower side surfaces of the slideway are provided with sliding chutes, the sliding chutes are distributed along the direction of the slideway, the first guide pulley and the second guide pulley are rotatably connected with the protection plate through a support shaft, the support shaft is sleeved with a limiting piece, the limiting piece and the support shaft are axially limited, and the limiting piece is positioned in the sliding chute.

The invention is further arranged in that the limiting part comprises two wheel discs, a second ring groove for accommodating a bearing is formed in the end face of each wheel disc, which is opposite to the end face of each wheel disc, a convex ring fixedly connected with the supporting shaft is arranged in each second ring groove, a bearing is pressed between the convex ring and the step face of each second ring groove, and the bearing is used for rotatably supporting the wheel discs; elasticity supports to press spacing spring between the rim plate, be provided with the annular that is used for the part to hold spacing spring on the terminal surface of rim plate one, the periphery of annular is provided with the elastic ring.

The invention also provides an irradiation protection method, which adopts the protection device to carry out irradiation protection, when the electron beam irradiation device works normally, the irradiation power is at a stable value, the protection plate is at a retracting position, and the emitting end of the irradiation box is opened towards the goods direction; when the electron beam irradiation device is in emergency shutdown, the irradiation is stopped, then the driving mechanism drives the protection plate to move to the unfolding position, and the protection plate is shielded between the emission end of the irradiation box and the direction of goods; after the electron beam irradiation device is restarted, the irradiation power rises, and the protection plate is positioned at the unfolding position; until the irradiation power reaches a stable value, the driving mechanism drives the protection plate to move to the unfolding position, and the emitting end of the irradiation box is opened towards the direction of the goods.

In conclusion, the invention has the following beneficial effects: the movable protection plate is adopted to block and protect irradiation, when the irradiation equipment is shut down in case of emergency, the driving mechanism can drive the protection plate to move to the unfolding position, the irradiation emission end and the goods can be blocked before the irradiation equipment is increased to the preset stable value, the protection plate between the irradiation emission end and the goods is withdrawn to the folding position until the irradiation frequency reaches the stable value, the irradiation dose can be conveniently controlled, the uniformity of the irradiation dose absorbed by the goods is ensured, the goods can be subjected to the quantitative and uniform irradiation dose in the irradiation process, and the potential risks such as worm eggs in agricultural products, microorganisms and harmful bacteria in medical instruments and the like can be stably and reliably killed; during the period from the restart of the irradiation equipment to the normal operation, the goods are protected from being damaged due to the absorption of more irradiation dose; and in the process of restarting the radiation equipment, the goods in the irradiation area are manually removed, so that the labor cost is reduced, and the irradiation treatment efficiency is improved.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of an electron beam irradiation cargo protection device according to the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the cargo protection device according to the present invention;

fig. 3 is a first structural schematic diagram of a third embodiment of the cargo protection device irradiated by electron beams according to the present invention;

fig. 4 is a schematic structural diagram of a third embodiment of the cargo protection device irradiated by electron beams according to the present invention;

FIG. 5 is an enlarged view taken at A in FIG. 4;

FIG. 6 is a side view of a third embodiment of an electron beam irradiation cargo protection device of the present invention;

FIG. 7 is a schematic structural view of a third embodiment of the present invention, wherein the protective plate is in an extended position on the slide rail;

FIG. 8 is a schematic view of a third embodiment of the invention showing the protective sheet in a stowed position on the chute;

fig. 9 is a first schematic structural diagram of a slide rail, a buffer mechanism and a locking mechanism according to a third embodiment of the present invention;

fig. 10 is a second schematic structural view of the slide rail, the buffer mechanism and the locking mechanism according to the third embodiment of the present invention;

FIG. 11 is a schematic structural view of the locking mechanism of the present invention;

FIG. 12 is an enlarged view of a portion of the locking mechanism of the present invention;

FIG. 13 is a schematic view of the structure of the damping mechanism of the present invention;

fig. 14 is a schematic structural view of the supporting shaft, the limiting member and the sliding rail of the sliding member according to the present invention.

Reference numerals: 1. an irradiation box; 2. a conveyor belt; 3. a mounting frame; 4. a protection plate; 5. rotating the bracket; 6. a drive mechanism; 7. a slide rail;

8. a slider; 81. a first guide pulley; 82. a second guide pulley; 83. a support shaft; 84. a chute; 85. a limiting member; 86. a wheel disc; 87. a first ring groove; 88. limiting and buffering; 89. a second ring groove; 810. a convex ring; 811. a bearing; 812. an elastic ring;

9. a buffer mechanism; 91. a buffer rod; 92. a buffer seat; 93. a buffer sliding sleeve; 94. a first buffer sliding block; 95. a second buffer sliding block; 96. a first buffer spring; 97. a buffer slide block III; 98. a second buffer spring; 99. a conical projection; 910. a conical depression; 911. a third buffer spring; 912. a cavity;

10. a locking mechanism; 101. a locking groove; 102. a locking block; 103. a locking sleeve; 104. a locking recess; 105. a first locking spring; 106. an electromagnet; 107. a second locking spring; 108. a bevel; 109. a vertical plane; 110. a bottom surface;

11. a driving end; 12. a slideway; 13. an exhaust hood; 14. a horizontal segment; 15. an inclined section; 16. a vertical section; 17. and (7) cargo.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

The embodiment discloses a cargo protection device through electron beam irradiation, which is described with reference to fig. 1 and comprises a protection plate 4 and a driving mechanism 6, wherein the protection plate is used for protecting an electron beam emitting end of a radiation box, the general radiation box 1 is a triangular cover body with a large lower part and a small upper part and is fixed through mounting frames 3 at two sides, and an electron beam is emitted from the emitting end under the radiation box to irradiate cargo 17 below; the protection plate 4 is positioned at the position of the emitting end at the lower part of the irradiation box 1; the protective plate 4 can shield the electron beam emitted from the irradiation box 1, and a lead plate which cannot be penetrated by the electron beam radiation is generally adopted; the lead plate is used alone for protection, so that bremsstrahlung radiation can be caused, high-lead optical glass can be covered on the upper layer of the lead plate, and composite shielding is adopted, so that bremsstrahlung radiation can be effectively reduced.

Generally, a corresponding cargo 17 conveying line is installed in the irradiation system to drive the cargo 17 to be conveyed from the lower part of the irradiation box 1 to pass through, and the cargo 17 is subjected to irradiation treatment by the electron beams when passing through.

The protection plate 4 is in a movable structure and can move between an unfolding position and a folding position by being driven by a driving mechanism 6; in the unfolded position, the protection plate 4 is shielded between the emitting end of the irradiation box 1 and the goods 17; in the stowed position, the emission end of the irradiation box 1 is open towards the goods 17; can change the position state of protection shield 4 through actuating mechanism 6 to switch the switching condition of irradiation box 1 lower part emission end for below goods 17, can be when irradiation equipment's electron beam frequency is unstable, remove protection shield 4 to the development position, thereby block the protection to goods 17, when treating the electron beam frequency and reach stable value, again through with protection shield 4 from development position activity to packing up the position, make the electron beam can normally irradiate goods 17, improved the even degree of irradiation.

The driving mechanism 6 can be driven by various driving modes, such as an electric push rod, a pneumatic mode or a hydraulic mode, and can drive the protection plate 4 to move; the expanded position of the protection plate 4 is generally positioned below the irradiation box 1, and the protection plate can also be arranged at the position of the corresponding electron beam irradiation end in equipment with different structural styles; the retracted position of the protection plate 4 is located on one side of the extended position of the protection plate 4, and the protection plate 4 does not block the emitting end of the radiation box 1.

The protection plate 4 can adopt various forms such as sliding, rotating and the like, and can move between an unfolding position and a folding position; in this embodiment, the protection plate 4 is a rectangular lead plate, the driving structure can select a linear driver which is relatively simple to control, one side of the longer side of the protection plate 4 is rotatably connected to the lower part of the irradiation box 1 through a rotating bracket 5, the other side of the protection plate 4 is driven to rotate through a driving mechanism 6, the fixed end of the linear driver is rotatably connected to the irradiation box 1, the driving end 11 is rotatably connected with the other end of the protection plate 4, the protection plate 4 is driven to move under the driving of the linear driver, a rotary door structure which can be opened and closed is formed below the irradiation box 1, and the shielding and opening of the emitting end of the irradiation box 1 and one side of the goods 17 can be realized.

In order to facilitate the control of the protective device, a reserve power supply can be added, which can continue to function as a drive device after the irradiation device has stopped working, so as to drive the movement of the protective plate 4.

The embodiment also discloses an irradiation protection method, which adopts the irradiation protection device to protect the irradiated goods 17; when the electron beam irradiation device works normally, the irradiation power is at a stable value, the protection plate 4 is at a retracting position, and the emitting end of the irradiation box 1 is opened towards the goods 17; when the electron beam irradiation device is in emergency shutdown, irradiation is stopped, then the driving mechanism 6 drives the protection plate 4 to move to the unfolding position, and the protection plate 4 is shielded between the emitting end of the irradiation box 1 and the goods 17; after the electron beam irradiation device is restarted, the irradiation power rises, and the protection plate 4 is in the unfolding position; until the irradiation power reaches a stable value, the driving mechanism 6 drives the protection plate 4 to move to the unfolding position, and the emitting end of the irradiation box 1 is opened towards the goods 17.

The running time of the driving mechanism 6 can be automatically controlled in a pre-programmed mode, and when the electron beam irradiation device starts to unfold signals after emergency shutdown, corresponding actions are generated to enable the protection plate 4 to move to the unfolded position; and then, after the irradiation power of the electron beam is normal, a retraction signal is sent out to generate a desired movement, so that the protection plate 4 moves to a retraction position.

Example two

The present embodiment discloses an electron beam irradiation cargo protection device, which has substantially the same structure as that of the first embodiment, except for the movement of the protection plate 4 and the installation form of the driving mechanism 6, as shown in fig. 2, the protection plate 4 is located below the emission end of the irradiation box 1, in the present embodiment, a sliding structure is adopted, and the protection plate 4 can slide between an expanded position and a retracted position; the driving mechanism 6 can also select a linear driver, the linear driver can be directly and fixedly arranged at the lower part of the irradiation box 1, the protection plate 4 is fixedly arranged at the driving end 11 of the linear driver, and translational sliding is realized below the irradiation box 1 through linear driving of the linear driver, so that the irradiation box 1 is opened and closed.

Because the density of the lead plate is relatively high, the slide rails 7 (not shown in fig. 2) can be arranged at the two sides of the lower part of the irradiation box 1, the sliding parts 8 which are matched with each other are arranged at the two sides of the protection plate 4, the protection plate 4 can slide along the slide rails 7 through the sliding parts 8, the operation of the protection plate 4 is pre-supported and limited, the linear driver only realizes the driving function, the action stability and the service life of the protection plate 4 can be improved, and the stress influence of the linear driver is reduced.

EXAMPLE III

The present embodiment discloses an electron beam irradiation cargo protection device, which is further optimized in terms of the sliding structure of the protection plate 4 and the corresponding arrangement of the driving mechanism 6 on the basis of the second embodiment, and is described in detail with reference to fig. 3 to 13.

The two sides of the lower part of the irradiation box 1 are provided with slide rails 7, and the two sides of the protection plate 4 are provided with adaptive sliding parts 8 to form an auxiliary sliding structure; a slide way 12 in the slide rail 7 forms an upward inclined structure, and specifically comprises a horizontal section 14, an inclined section 15 and a vertical section 16 which are sequentially connected, wherein the inclined section 15 is connected between the tail end of the horizontal section 14 and the lower end of the vertical section 16; as shown in fig. 7, when the protection plate 4 slides to the horizontal section 14, the protection plate 4 is shielded between the emitting end and the goods 17, i.e. located at the unfolding position; as shown in fig. 8, the protection plate 4 continues to slide along the slide rail 7, and when the protection plate 4 slides to the vertical section 16, the protection plate 4 moves out from between the emitting end and the goods 17, the emitting end is opened towards the goods 17, namely, the protection plate 4 is located at the retracting position, and the protection plate 4 is folded upwards along the upwards bent slide rail 12, so that the protection plate 4 can be lifted upwards, and compared with the downward folding rotation, the protection plate can avoid touching the goods 17 passing below.

The sliding parts 8 on two sides of the protection plate 4 comprise two parts, namely a first guide pulley 81 and a second guide pulley 82 which are distributed front and back along the sliding rail 7, the first guide pulley 81 is positioned on one side, away from the vertical end, of the second guide pulley 82, in the sliding process, the first guide pulley 81 slides in the horizontal section 14 of the sliding rail 12, and in the moving process of the first guide pulley 81 towards the vertical end, the first guide pulley continues to move upwards from the horizontal section 14, then passes through the inclined section 15 and then enters the vertical section 16 to slide upwards, so that the protection plate 4 is in an upwards inclined state.

The driving mechanism 6 can also adopt a linear actuator, the linear actuator is arranged on the mounting frames 3 at two sides of the irradiation box 1, the driving end 11 of the linear actuator is abutted against the part of the first guide pulley 81 extending out of the slide way 12, the linear actuator can be abutted to push the first guide pulley 81 to move towards the inclined section 15 in the horizontal section 14 in the linear motion process, and the position of the second guide pulley 82 is closer to the inclined section 15, so that the linear actuator can slide upwards along the inclined section 15 firstly and enter the vertical section 16; in the driving process of the linear actuator, only the abutting support is formed, and a fixed connecting structure is not formed, so that smaller stress can be formed after certain deformation is generated, and the load condition of the linear actuator in the moving process can be reduced; when the protection plate 4 moves from the retracted position to the extended position, the protection plate 4 can slide downward under the action of the gravity of the protection plate 4, and then the protection plate 4 can move.

As shown in fig. 9 and 10, a locking mechanism 10 may be provided at the upper end of the vertical section 16, and the locking mechanism 10 is used for locking the second guide pulley 82 on the protection plate 4 to maintain the protection plate 4 in a state of opening the emission end toward the cargo 17. When the driving mechanism 6 pushes the protection plate 4 to move obliquely upwards, the second guide pulley 82 slides to the locking mechanism 10 at the upper end of the vertical section 16, the position of the second guide pulley 82 is locked, the protection plate 4 is locked at the retracted position, the linear actuator of the driving mechanism 6 can directly return at the moment and is not affected by the load of the protection plate 4, the load stress of the linear actuator can be reduced, and the service life of the linear actuator is prolonged.

As shown in fig. 11 and 12, the locking mechanism 10 includes a locking block 102, a locking spring i 105, an electromagnet 106, and other components, opposite locking grooves 101 are formed on two sides of the vertical section 16, two ends of the locking block 102 respectively extend into the locking grooves 101 on the two sides to form a structure capable of moving left and right, a downward locking recess 104 is formed at a position of the locking block 102 corresponding to the slide rail 12, the locking recess 104 has a slightly larger contour and is used for accommodating the locking recess 104 of the second guide pulley 82, the locking spring i 105 is used for elastically maintaining the locking recess 104 of the locking block 102 right opposite to the slide groove 84, the electromagnet 106 is located on the other side of the locking groove 101 and is mutually matched and adsorbed with the magnetic component, and can drive the locking block 102 to slide into the locking groove 101, so that the side wall below the locking groove 101 blocks the locking recess 104, and lock and limit the second guide pulley 82 sliding into the locking recess 104.

Referring to fig. 11, the cross section of the locking recess 104 may be in a shape of a right trapezoid, and includes a downward opening, an upper bottom surface 110, a lateral inclined surface 108, and a vertical surface 109, where the inclined surface 108 is located on a side away from the magnetic attraction of the electromagnet 106, and when the second pulley 82 sinks into the locking recess 104, the second pulley 82 abuts against the bottom surface 110, the inclined surface 108, and the vertical surface 109, and when the second pulley 82 is limited, the second pulley 82 is mainly subjected to the magnetic attraction of the electromagnet 106, and a pushing action of pressing the second pulley 82 is generated by one side of the inclined surface 108, and due to the inclined surface 108 having a certain downward inclined angle, downward pressure is generated on the second pulley 82, so that the pressing and friction between the second pulley 82 and the lower side wall of the locking groove 101 can be increased, and the stability of the second pulley 82 after locking can be further increased; when the irradiation equipment is powered off or the production shop is powered off, the magnetism of the electromagnet 106 disappears, at this time, the lower opening of the locking recess 104 is opposite to the slide way 12 under the action of the locking spring I105, the second guide pulley 82 enters the slide way 12, and then the protection plate 4 slides downwards along the slide way 12 under the action of gravity, automatically slides to the unfolding position from the folding position, and forms pre-shielding for the emitting end at the lower part of the irradiation box 1; when the second guide pulley 82 enters the vertical section 16 from the lower part to realize locking, the electromagnet 106 can automatically control to realize action; the structure of normal close of circular telegram can also be adopted, because the existence of the inclined plane 108 on the locking recess 104, when the guide pulley second 82 moves upwards, the guide pulley second 82 will be abutted against the inclined plane 108 of the locking recess 104, and under the action of the inclined plane 108, a certain horizontal component force will be generated for the locking block 102, and the locking block 102 will be pushed to move to the left (extending the direction of fig. 11), so that the lower end of the locking recess 104 is opened to be opposite to the slide 12 of the vertical section 16 until the guide pulley second 82 completely enters the locking recess 104, and then the electromagnet 106 adsorbs and drives the locking block 102 to be certain, so that the locking recess 104 is blocked, and the locking of the guide pulley second 82 is realized.

In order to increase the stability of the locking block 102 in the process of receiving an upward or downward component force, a locking sleeve 103 is additionally arranged in the locking mechanism 10, the locking block 102 is arranged in the locking sleeve 103, two sides of the locking sleeve 103 are slidably connected in the locking groove 101, a locking spring I105 elastically presses between the bottom surface 110 of the locking groove 101 and the outer wall of the locking sleeve 103, an electromagnet 106 is arranged in the locking groove 101 on the other side, and the locking sleeve 103 is made of a magnetic material; the magnetic attraction to the locking sleeve 103 can drive the locking block 102 to move, so that the locking action is realized; the locking block 102 can slide up and down in the locking sleeve 103, so that a certain space floating up and down is formed in the locking sleeve 103 by the locking block 102, and a locking spring II 107 is elastically pressed on the upper part of the locking block 102, so that the locking block 102 has certain upward elastic floating and maintains a relatively fixed position under the action of the locking spring II 107; when the inclined surface 108 of the locking recess 104 is acted, the second locking spring 107 can be overcome, the locking block 102 is prevented from being locked, and the second guide pulley 82 can be conveniently extruded into the locking recess 104 from the lower part to a certain extent.

As shown in fig. 9, 10 and 13, a buffer mechanism 9 is provided at one end of the horizontal section 14 away from the inclined section 15, so as to buffer and limit the protection board 4 sliding down under the self-weight; the buffering mechanism 9 comprises a buffering rod 91 and a buffering seat 92, a buffering slide block I94 is connected in an inner cavity of the buffering seat 92 in a sliding manner, one side, away from the sliding chute 84, of the buffering slide block I94 is elastically supported through an elastic component, one end of the buffering rod 91 is fixedly connected with the buffering slide block I94, and the other end of the buffering rod 91 penetrates through a buffering sliding sleeve 93 in the buffering seat 92 and extends into the horizontal section 14 of the slideway 12 to be used for abutting against a buffering guide pulley I81; and under the condition of no stress, the end part of the buffer rod 91 is beyond the driving end 11 of the driving mechanism 6, namely, the guide pulley 81 of the buffer rod is contacted with the end part of the buffer rod 91 for buffering in the process of sliding the protection plate 4 downwards, so that the driving mechanism 6 is prevented from being damaged by impact collision.

As shown in fig. 13, the elastic assembly includes a second buffer slider 95 and a third buffer slider 7, the second buffer slider 95 abuts against the third buffer slider 7, a first buffer spring 96 elastically abuts against the second buffer slider 95 and the first buffer slider 94, a second buffer spring 98 abuts against the third buffer slider 7 and the bottom surface 110 of the inner cavity of the buffer seat 92, the buffer is more stably absorbed by adopting multiple sets of springs, the first buffer spring 96 is relatively soft, the elastic deformation floats greatly, the deformation buffering is mainly realized by the first buffer spring, and the second buffer spring 98 mainly plays a role in supporting the second buffer slider 95 and the third buffer slider 7.

The side of the buffer slide block III 7 facing the buffer slide block II 95 is provided with a conical protrusion 99, the side of the buffer slide block II 95 facing the buffer slide block III 7 is provided with a conical recess 910 which is mutually sleeved with the conical protrusion 99, the profile of the conical protrusion 99 is slightly larger than that of the conical recess 910, the outer side of the buffer slide block II 95 is in sliding fit with the inner cavity wall of the buffer base 92, when the buffer slide block II 95 is impacted, a movement trend towards the left side is generated, at the moment, the conical protrusion 99 and the conical recess 910 are extruded by the conical protrusion 99, the conical recess 910 in the buffer slide block II 95 is subjected to an outward extrusion component force, so that the buffer slide block II 95 generates a certain amount of outward deformation, the profile is slightly enlarged, the extrusion friction between the outer wall of the buffer slide block II 95 and the inner wall of the buffer base 92 is increased, so that the buffer slide block II 95 is stabilized to form an almost fixed effect, the impact of the protection plate 4 can be better borne, and the bottom surface 110 of the buffer seat 92 is prevented from being damaged due to excessive stress by the side wall.

A buffer spring III 911 can be elastically pressed between the top of the conical protrusion 99 and the bottom of the conical recess 910, and a containing cavity 912 for partially containing the buffer spring III 911 is arranged at the top of the conical protrusion 99; (ii) a After the buffering rod 91 receives buffering, the buffering slide block II 95 and the buffering slide block III 7 are pushed away by the elastic support of the buffering spring III 911, the conical protrusion 99 is separated from the conical recess 910, and the buffering slide block II 95 recovers smooth sliding in the inner cavity of the buffering seat 92.

Example four

In the present embodiment, an electron beam irradiation cargo protection device is disclosed, which is further improved on the basis of the third embodiment in order to further increase the lateral stability of the sliding on the protection plate 4, and the detailed description is provided with reference to fig. 14.

The upper side surface and the lower side surface of the slideway 12 are provided with sliding chutes 84, and the sliding chutes 84 are distributed along the trend of the slideway 12; the first guide pulley 81 and the second guide pulley 82 are rotatably connected with the protection plate 4 through a support shaft 83, the support shaft 83 is sleeved with a limiting piece 85, the limiting piece 85 and the support shaft 83 are axially limited, and the limiting piece 85 is embedded into the sliding chute 84, so that axial movement is limited and supported, and stability in the moving process is improved.

The limiting part 85 comprises two wheel discs 86, a second ring groove 89 for accommodating a bearing 811 is formed in the end face of the wheel disc 86 opposite to the end face, a convex ring 810 fixedly connected with the supporting shaft 83 is preset in the second ring groove 89, the bearing 811 is pressed between the convex ring 810 and the step face of the second ring groove 89, the bearing 811 can smoothly rotate the wheel disc 86, and the bearing 811 can adopt a self-aligning roller bearing 811 or a bearing 811 capable of bearing an axial load; the limiting springs are elastically abutted between the wheel discs 86, the first ring grooves 87 used for partially accommodating the limiting springs are formed in the end faces of the wheel discs 86, the elastic rings 812 are arranged on the peripheries of the first ring grooves 87, and therefore when large axial load is received, certain elastic floating can be formed between the two wheel discs 86, axial stability of the sliding piece 8 is kept, and stable movement of the protection plate 4 is kept.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.