A ray irradiation instrument for fruit tree branch mutation breeding

Abstract

The application provides a ray irradiator for fruit tree branch mutation breeding, which comprises a cabin, a ray irradiator and an irradiation work area arranged in the cabin, and a linear driver with one end extending into the irradiation work area and the other end located outside the cabin. A branch fixer is moved into the irradiation work area by the linear driver, and a lead block is arranged on the cabin for the branch fixer to pass through, which seals the cabin. The branch fixer comprises a rotary driver, and an output end of the rotary driver is provided with a rotating shaft. Two fixed discs are spacedly and key-connected to the rotating shaft. Each fixed disc is provided with embedding holes, and the embedding holes on each fixed disc are distributed in the circumferential direction. Two ends of the branch are respectively inserted into the embedding holes of the two fixed discs. The rotary driver drives the fixed discs to rotate, so that each branch is sequentially directed to the ray irradiator. The application has the advantages of compact structure, convenient use, low maintenance cost, high branch irradiation uniformity, controllable irradiation dose and good repeatability.

Description

Technical Field

[0001] This invention belongs to the technical field of mutation breeding equipment, specifically relating to a radiation irradiator for mutation breeding of fruit tree branches. Background Technology

[0002] The application of fruit tree branch mutagenesis and in vitro culture techniques in conventional breeding has become more widespread in recent years, resulting in a continuous increase in the types and numbers of new varieties developed. Since most fruit trees are perennial woody plants with long growth cycles, highly heterozygous genes, and large land requirements, conventional hybridization breeding is significantly limited. Artificial mutagenesis, however, can increase the natural mutation rate by more than a thousand times, thus greatly improving the feasibility of artificially creating, improving, and screening for variations.

[0003] The most commonly used mutagenesis techniques are X-rays, gamma rays, beta rays, and neutrons. In recent years, with the widespread use of electron beam irradiators, electron beam irradiation mutagenesis has also begun to be applied more frequently in fruit tree breeding.

[0004] Currently, there are no commercially available single-unit irradiation devices specifically designed for mutagenesis of fruit tree branches. Conventional branch mutagenesis using electron beam accelerators, gamma rays, or neutron rays all require large, immovable shielding structures and dedicated delivery lines to complete the mutagenesis process. This results in high system costs, extensive environmental assessments, equipment maintenance, safety assurance, and even energy consumption far exceeding the capacity of ordinary laboratories. Furthermore, the low precision of dose control for irradiated branches and poor experimental repeatability are also significant drawbacks.

[0005] Therefore, a low-cost, simple-structured, easy-to-maintain, and safe-to-use single-unit box-type fruit tree branch mutation X-ray irradiation instrument can greatly make up for the above-mentioned shortcomings and help more researchers carry out mutation and variation research on new fruit / crop varieties. Summary of the Invention

[0006] The purpose of this invention is to provide a radiation irradiator for fruit tree branch mutation breeding, in order to solve the problems of existing large-scale industrial irradiation equipment systems being complex and bulky, having low uniformity and control precision of the irradiation dose received by branches, and being unsuitable for widespread use in scientific research.

[0007] This invention provides the following technical solution:

[0008] A radiation irradiator for fruit tree branch mutation breeding includes:

[0009] The cabin contains a built-in radiation irradiator and an irradiation work area, wherein the radiation irradiator emits radiation toward the irradiation work area;

[0010] A linear actuator, one end of which extends into the irradiation working area and the other end is located outside the cabin;

[0011] A branch holder is mounted on the linear actuator and moved by the linear actuator to the irradiation work area. The chamber is provided with a lead barrier for the branch holder to pass through, and the lead barrier seals the chamber.

[0012] The branch fixer includes:

[0013] A rotary driver, wherein a rotating shaft is mounted at the output end of the rotary driver;

[0014] Two fixed disks are keyed to the rotating shaft at intervals; each fixed disk is provided with a recess, and the recesses on each fixed disk are distributed along the circumference. The two ends of the branch are respectively inserted into the recesses of the two fixed disks; the rotary driver drives the fixed disks to rotate, so that each branch faces the irradiator in sequence.

[0015] Preferably, the two fixing discs are a first fixing disc and a second fixing disc, the first fixing disc having a blind hole; the second fixing disc having a groove distributed on the edge of the second fixing disc, the groove extending radially through the edge of the second fixing disc, the end of the branch in the groove being fixed by a clamp.

[0016] Preferably, the clamp includes a band and a buckle, the buckle is installed at the end of the band, the band clamps the second fixing plate, and the buckle locks the band onto the second fixing plate.

[0017] Preferably, the second fixing plate has a positioning groove on its side wall, and the hoops are embedded in the positioning groove.

[0018] Furthermore, it also includes an arc-shaped pre-positioning strip for fixing the branch in the groove when the shaft rotates, the pre-positioning strip being wrapped around the side wall of the second fixing plate.

[0019] Preferably, the rotary driver is mounted on a bearing bracket, and the bearing bracket is mounted on a base plate; a support block is provided at the bottom center of the prepositioning bar, and an arc-shaped clearance edge is provided on one side of the bottom of the support block, so that the clearance edge avoids the base plate when the prepositioning bar rotates.

[0020] Preferably, the prepositioning strip is made of ferromagnetic material and is adsorbed onto the second fixing plate.

[0021] Preferably, the base plate is provided with a limiting block, which is located below the branch. Before installing the clamp, the pre-positioning strip can be pushed to abut against the limiting block.

[0022] Furthermore, the cabin is equipped with a duct assembly for absorbing and exhausting ozone generated inside the cabin to the outside. The duct assembly includes a lead body and an axial flow fan installed on the lead body. The lead body is equipped with a wind cavity that connects to the outside of the cabin.

[0023] Furthermore, a power supply, an alarm, a touch screen, and a controller are installed on the cabin. The power supply provides power to the alarm, touch screen, controller, radiation irradiator, linear actuator, rotary actuator, and axial flow fan. The touch screen is connected to the controller, and the controller is connected to the radiation irradiator, alarm, linear actuator, rotary actuator, and axial flow fan, respectively.

[0024] The beneficial effects of this invention are:

[0025] This invention proposes a compact X-ray irradiator for mutagenesis of fruit tree branches. The irradiator can be an X-ray irradiator, such as using a low-power X-ray machine as a fixed radiation source. A linear actuator is installed within the irradiation range of the irradiator's light source, which transports the branch holder into the irradiation working area inside the chamber. A dedicated branch holder is mounted on the slider of the linear actuator. At the start of use, the slider moves to the loading position outside the chamber, where personnel secure the branch to the branch holder. After securing, the linear actuator is activated, driving the branch holder into the irradiation working area inside the chamber; the irradiator is then activated to begin irradiation. Driven by a rotary actuator, the branch holder rotates at a uniform speed around its axis, simultaneously ensuring the branch receives uniform radiation. While the branch holder rotates, the linear actuator also causes the entire branch holder to move linearly at a uniform speed along its direction of travel. This invention provides accurate and controllable irradiation dose and high repeatability of mutagenesis experiments.

[0026] The chamber of this invention is a lead-clad structure to ensure no radiation leakage, with only one entrance / exit for a branch holder, facilitating laboratory use. This entrance / exit is also shielded by lead curtains or lead doors to protect the radiation emitted during mutation irradiation. Formaldehyde casters are installed under the chamber for moving individual equipment. An ozone exhaust duct is also designed inside the chamber to facilitate the removal of ozone generated during operation, while simultaneously reducing radiation leakage.

[0027] This invention emits no radioactive particles after power failure, uses only 220V AC mains power, and has low operational safety risks.

[0028] Compared to large-scale industrial irradiation equipment, this invention has low operating and maintenance costs, low power consumption, and no concerns about the recovery of the radioactive source. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the branch fixing device structure of the present invention;

[0033] Figure 4 This is a schematic diagram of one structure of the hoop of the present invention;

[0034] Figure 5 This is a schematic diagram of the process of fixing the branch to the branch fixer in Embodiment 2 of the present invention;

[0035] Figure 6 This is a schematic diagram of the process of prepositioning the branch in Embodiment 2 of the present invention;

[0036] Figure 7 This is a side view of the prepositioning bar following the rotation of the second fixed disk in Embodiment 2;

[0037] Figure 8 This is a side view of the prepositioning bar after it has rotated into position following the second fixed plate in Embodiment 2.

[0038] The following are labeled in the diagram: 1. Cabin; 2. Linear actuator; 3. Branch holder; 4. Lead barrier; 5. Frame; 6. Loading position; 7. Radiation irradiator; 8. Irradiation work area; 9. Partition; 10. Casters; 11. Lead cover; 12. Base plate; 13. Bearing bracket; 14. Rotary actuator; 15. Shaft; 16. First fixing plate; 17. Second fixing plate; 18. Hoop; 19. Fastener; 20. Blind hole; 21. Groove; 22. Positioning groove; 23. Pressure block; 24. Lead body; 25. Air cavity; 26. Switch; 28. Alarm; 29. ​​Touch screen; 30. Pre-positioning strip; 31. Limiting block; 32. Support block; 33. Clearance edge; 34. Branch. Detailed Implementation

[0039] Example 1

[0040] like Figures 1 to 4 As shown, a radiation irradiator for fruit tree branch mutation breeding includes: a chamber 1, a linear actuator 2, and a branch holder 3.

[0041] like Figure 1As shown, the chamber 1 is a structural chamber with a frame constructed from welded square tubing. Most of the six sides of chamber 1 are shielded with pure lead to prevent radiation leakage. Only one entrance / exit for a branch holder 3 is provided on the front side of chamber 1. An openable lead barrier 4, such as a lead curtain or lead door, is installed at this entrance / exit to allow the branch holder 3 to pass through. The lead barrier 4 is then closed to seal the chamber.

[0042] like Figure 2 As shown, a frame 5 is also installed on the cabin 1 to support the linear actuator 2. Part of the frame 5 is located inside the cabin 1, and part of it is located outside the cabin (i.e., the loading position 6).

[0043] The chamber 1 houses a radiation irradiator 7 and an irradiation work area 8. The radiation irradiator 7 is mounted on a partition 9, which has a window for radiation to pass through. The radiation irradiator 7 emits radiation into the irradiation work area 8. The radiation irradiator 7 can be an X-ray machine or other radiation irradiation instrument.

[0044] The bottom of the cabin 1 is equipped with Foma casters 10 for easy movement of the cabin.

[0045] One end of the linear actuator 2 extends into the irradiation working area 8, and the other end is located outside the chamber (i.e., the loading position 6). It is used to send the branch holder 3 into the irradiation working area 8 and drive the branch holder 3 to move linearly within the chamber 1. The linear actuator 2 can be a linear slide, an electric lead screw, etc. In this embodiment, it is a linear slide. The part of the linear actuator 2 located outside the chamber 1 is covered by a lead cover 11, which extends into the chamber 1 to prevent radiation leakage.

[0046] like Figure 2 and Figure 3 As shown, the branch holder 3 is mounted on the slider of the linear actuator 2 to fix the branch 34 and drive the branch 34 to rotate inside the chamber so that the branch receives irradiation more evenly.

[0047] The branch fixing device 3 includes: a base plate 12, a bearing bracket 13, a rotary drive 14, a rotating shaft 15, a first fixing plate 16, a second fixing plate 17, and a clamp.

[0048] The base plate 12 is mounted on the slider of the linear actuator 2, the bearing bracket 13 is fixed on the base plate 12, and the rotating shaft 15 is mounted on the bearing bracket 13. The output end of the rotary actuator 14 is connected to the rotating shaft 15 through a coupling, driving the rotating shaft 15 to rotate. The rotary actuator 14 can be a micro motor.

[0049] Two fixed disks are keyed to the rotating shaft 15 at intervals. Each fixed disk has a recessed hole, which is distributed circumferentially, preferably with the center of the circumference located on the axis of the rotating shaft 15. The two ends of the branch 34 are inserted into the recessed holes of the two fixed disks, thereby being fixed to the fixed disks. The rotary actuator 14 drives the fixed disks to rotate, so that each branch faces the irradiator in sequence and receives irradiation evenly; at the same time, the linear actuator 2 can drive the branch holder 3 to move linearly within the chamber, further improving the irradiation uniformity of the branch.

[0050] Specifically, the two fixing plates are the first fixing plate 16 and the second fixing plate 17. The hole in the first fixing plate 16 is a blind hole 20, which can play a role in axial positioning of the branches during installation.

[0051] The recess of the second fixing plate 17 is a groove 21 distributed on the edge of the second fixing plate. The groove 21 penetrates the edge of the second fixing plate radially, that is, the opening of the groove is located on the edge of the second fixing plate. One end of the branch 34 can be inserted into the blind hole 20 first, and the other end can be inserted into the groove 21 through the opening, and then fixed by the clamp.

[0052] The clamp includes a band 18 and a buckle 19. The band 18 can be a metal band, and the buckle 19 is installed at the end of the band 18. The band 18 clamps the second fixing plate 16, and the buckle 19 locks the band 18 onto the second fixing plate 16.

[0053] A positioning groove 22 can be set on the side wall of the second fixed plate 16. The width of the positioning groove 22 is slightly larger than the width of the hoop. The hoop 18 can be embedded into the positioning groove 22 to quickly and accurately clamp the second fixed plate with the hoop.

[0054] The band can be a smooth, strip-like structure. For example... Figure 4 As shown, if the branches are thin, a protruding pressure block 23 can be set on the inside of the hoop 18 to press the branches tightly into the groove 21; or soft material can be inserted between the branches 34 and the hoop 18.

[0055] like Figure 2 As shown, the cabin 1 is equipped with a duct assembly for absorbing and exhausting ozone generated inside the cabin to the outside of the cabin 1. The duct assembly includes a lead body 24 and an axial flow fan (not shown) installed on the lead body 24. The lead body 24 is equipped with an S-shaped air cavity 25, which connects to the outside of the cabin. The axial flow fan exhausts the ozone generated inside the cabin to the outside of the cabin 1 through the S-shaped air cavity 25, thereby reducing the leakage of X-rays while exhausting ozone.

[0056] like Figure 1As shown, the cabin 1 is equipped with a switch 26, a power supply, an alarm 28, a touch screen 29, and a controller. The power supply provides power to the alarm 28, the touch screen 29, the controller, the radiation irradiator 7, the linear actuator 3, the rotary actuator 14, and the axial flow fan. The alarm 28 is equipped with a power-on indicator light and a radiation output indicator light. The touch screen 29 is connected to the controller and inputs commands to the controller. The controller is connected to the radiation irradiator, the alarm, the linear actuator, the rotary actuator, and the axial flow fan via signal lines to control the operation of each device.

[0057] The working process of this embodiment is as follows:

[0058] The radiation irradiator is activated; the linear actuator 2 moves the branch holder 3 to the loading position 6, and sequentially inserts both ends of multiple branches 34 into the blind holes of the first fixing plate 16 and the grooves of the second fixing plate 17, respectively. Then, the second fixing plate 17 is secured with a clamp 18 to fix the ends of the branches 34, and the clamp 18 is locked with a buckle 19. The linear actuator 2 transports the branch holder 3 into the chamber 1, and the rotary actuator 14 is activated to drive the branch holder to rotate, ensuring that the branches 34 receive radiation evenly. Simultaneously, the linear actuator 2 drives the branch holder 3 to move linearly within the irradiation working area, further improving the uniformity of radiation exposure. After irradiation, the linear actuator 2 returns the branch holder 3 to the loading position 6, opens the clamp, and removes the branches. The axial flow fan can be activated as needed to exhaust ozone generated inside the chamber to the outside.

[0059] Example 2

[0060] like Figures 5 to 8 As shown, this embodiment, based on embodiment 1, further includes a pre-positioning strip 30 and a limiting block 31. Please refer to... Figure 5 After inserting some branches 34 into the upper side of the fixing plate, the rotating shaft 15 needs to be rotated so that the empty side of the fixing plate faces upward, and then the remaining branches are inserted. In order to prevent the ends of the branches from falling out of the opening of the groove 21, before rotating the rotating shaft, the arc-shaped prepositioning strip 20 is wrapped around from above and fixed to the side wall of the second fixing plate 17, thereby fixing the branches in the groove. The prepositioning strip 30 can be made of ferromagnetic material and is adsorbed onto the second fixing plate.

[0061] A support block 32 is provided at the center of the outer side of the prepositioning strip 30. An arc-shaped clearance edge 33 is provided on one side of the bottom of the support block 32. When the prepositioning strip 30 rotates, the clearance edge 33 avoids the base plate 12 and does not interfere with the rotation of the prepositioning strip 30. The other parts of the bottom of the support block 32 are supported by the base plate 12.

[0062] A limiting block 31 is installed on the base plate 12, and the limiting block 31 is located below the branch 34. Please refer to... Figures 6 to 8When the prepositioning strip 30 is pre-rotated with the second fixed plate to be supported by the base plate, before installing the clamp, the prepositioning strip 30 is pushed to the side of the limiting block 31 until it abuts the limiting block 31 and stops moving. At this time, the prepositioning strip 30 temporarily supports the branch 34. After all the branches are installed on the fixed plate, the clamp that can fix the branches is installed on the second fixed plate 17. After the installation is completed, the prepositioning strip 30 can be removed.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A radiation irradiator for fruit tree branch mutation breeding, characterized in that, include: The cabin contains a built-in radiation irradiator and an irradiation work area, wherein the radiation irradiator emits radiation toward the irradiation work area; A linear actuator, one end of which extends into the irradiation working area and the other end is located outside the cabin; A branch holder is mounted on the linear actuator and moved by the linear actuator to the irradiation work area. The chamber is provided with a lead barrier for the branch holder to pass through, and the lead barrier seals the chamber. The branch fixer includes: A rotary driver, wherein a rotating shaft is mounted at the output end of the rotary driver; Two fixed disks are keyed to the rotating shaft at intervals; each fixed disk has circumferentially distributed insertion holes, and the two ends of the branches are respectively inserted into the insertion holes of the two fixed disks; the rotary actuator drives the fixed disks to rotate, so that each branch faces the irradiator in sequence; It also includes an arc-shaped pre-positioning strip for fixing the branches in the groove when the shaft rotates; the pre-positioning strip is wrapped around the side wall of the second fixing plate. The rotary actuator is mounted on a bearing bracket, which is mounted on a base plate. A support block is located at the center of the bottom of the pre-positioning bar, and an arc-shaped clearance edge is located on one side of the bottom of the support block. When the pre-positioning bar rotates, the clearance edge avoids the base plate. The prepositioning strip is made of ferromagnetic material and is adsorbed onto the second fixing plate; The base plate is provided with a limiting block, which is located below the branch. Before installing the clamp, the pre-positioning strip can be pushed to abut against the limiting block. When the prepositioning bar follows the second fixing plate to pre-rotate to be supported by the base plate, before installing the clamp, push the prepositioning bar to the side of the limiting block until it abuts the limiting block and stops moving. At this time, the prepositioning bar temporarily supports the branch. After all the branches are installed on the fixing plate, install the clamp that can fix the branch on the second fixing plate.

2. The radiation irradiator for fruit tree branch mutation breeding according to claim 1, characterized in that, The two fixing plates are a first fixing plate and a second fixing plate. The hole in the first fixing plate is a blind hole, and the hole in the second fixing plate is a groove distributed on the edge of the second fixing plate. The groove extends radially through the edge of the second fixing plate, and the end of the branch in the groove is fixed by a clamp.

3. The radiation irradiator for fruit tree branch mutation breeding according to claim 2, characterized in that, The clamp includes a band and a buckle. The buckle is installed at the end of the band, the band clamps the second fixing plate, and the buckle locks the band to the second fixing plate.

4. The radiation irradiator for fruit tree branch mutation breeding according to claim 3, characterized in that, The second fixing plate has a positioning groove on its side wall, and the hoop is embedded in the positioning groove.

5. The radiation irradiator for fruit tree branch mutation breeding according to any one of claims 1 to 4, characterized in that, The cabin is equipped with a duct assembly for absorbing and exhausting ozone generated inside the cabin to the outside. The duct assembly includes a lead body and an axial flow fan installed on the lead body. The lead body is equipped with a wind cavity that connects to the outside of the cabin.

6. The radiation irradiator for fruit tree branch mutation breeding according to claim 5, characterized in that, The cabin is equipped with a power supply, an alarm, a touch screen, and a controller. The power supply provides power to the alarm, touch screen, controller, radiation irradiator, linear actuator, rotary actuator, and axial flow fan. The touch screen is connected to the controller, which is connected to the radiation irradiator, alarm, linear actuator, rotary actuator, and axial flow fan, respectively.

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