Shielding structure for low energy self-shielding electron accelerator

Abstract

The present invention relates to a shielding structure for a low-energy self-shielding electron accelerator, comprising: an accelerator; an extraction window, the accelerator and the extraction window are connected through a scanning box; an absorption target support frame, an absorption target is arranged on the absorption target support frame, the absorption target and the titanium window on the extraction window are opposite to each other up and down, and the irradiated product irradiated in the shielding body passes between the absorption target and the titanium window; a lifting mechanism, the lifting mechanism is connected to the absorption target support frame, and is used to drive the absorption target support frame to approach or move away from the titanium window, so that the absorption target on the absorption target support frame approaches or moves away from the titanium window, and then drives the irradiated product on the absorption target to approach or move away from the titanium window. The above scheme provided by the present application has a simple structure, and the installation of the overall structure can be completed without civil construction. At the same time, because the lifting mechanism can drive the absorption target support frame to move, it is convenient to adjust the distance between the absorption target support frame and the titanium window.

Description

Technical Field

[0001] The invention relates to the technical field of electron accelerators, in particular to a shielding body structure for a low-energy self-shielding electron accelerator. Background Art

[0002] With the rapid development and application of electron accelerators in the irradiation industry, self-shielded electron accelerators are rapidly promoted and used in the irradiation industry due to their small size, online installation and production, and no special requirements for factory buildings.

[0003] However, the self-shielded electron accelerators currently on the market have complex structures, require civil construction during installation, and are inconvenient for staff to operate. Summary of the invention

[0004] Based on this, it is necessary to provide a shielding structure for a low-energy self-shielded electron accelerator in order to solve the problem that the existing self-shielded electron accelerator has a complex structure and requires civil construction during installation.

[0005] The present invention provides a shielding structure for a low-energy self-shielding electron accelerator, comprising:

[0006] accelerator;

[0007] An outlet window, the accelerator is connected to the outlet window via a scanning box;

[0008] An absorption target support frame, wherein the lead-out window and the absorption target support frame are both located in the shielding body, the absorption target support frame is located below the lead-out window, an absorption target is arranged on the absorption target support frame, the absorption target is vertically opposite to the titanium window on the lead-out window, and the irradiated product irradiated in the shielding body passes between the absorption target and the titanium window;

[0009] A lifting mechanism is connected to the absorption target support frame, and is used to drive the absorption target support frame to approach or move away from the titanium window, thereby making the absorption target on the absorption target support frame approach or move away from the titanium window, and further driving the irradiated product on the absorption target to approach or move away from the titanium window.

[0010] The shielding structure for low-energy self-shielding electron accelerator is simple in structure and the installation of the whole structure can be completed without civil construction. At the same time, since the lifting mechanism can drive the absorption target support frame to move, it is convenient to adjust the distance between the absorption target support frame and the titanium window, thereby facilitating the threading of the irradiated product.

[0011] In one of the embodiments, it further comprises a plurality of guide rollers, which are all arranged on the absorption target support frame and are used to guide the irradiated product to pass through the inlet and outlet of the titanium window in sequence.

[0012] In one of the embodiments, it further includes a cooling mechanism and a first pipe, wherein the cooling mechanism is fixed on the shielding body, the first pipe is disposed in the shielding body, and an air inlet of the cooling mechanism is opposite to the titanium window through the first pipe.

[0013] In one embodiment, the cooling mechanism includes a hair dryer fixed on the outside of the shielding body, the first pipe is a Z-shaped structure, one end of the Z-shaped first pipe is connected to the hair dryer, and the other end is opposite to the titanium window.

[0014] In one of the embodiments, it further includes an ozone blower and a second pipe, wherein the ozone blower is disposed outside the shielding body, the second pipe is disposed inside the shielding body, and the ozone blower is connected to the second pipe.

[0015] In one embodiment, the second pipe is a Z-shaped structure, one end of the Z-shaped second pipe is connected to the ozone blower, and the other end is located in the shielding body.

[0016] In one of the embodiments, it further comprises a shielding door, wherein the shielding door is arranged on the shielding body and the shielding door is located on the side of the outlet window.

[0017] In one of the embodiments, a door opening mechanism is further included, and the door opening mechanism cooperates with the shielding door to open or close the shielding door.

[0018] In one of the embodiments, the device further comprises a controller and a radiation monitor, wherein the controller is connected to the accelerator and the radiation monitor is arranged on the shielding door. When the radiation monitor detects radiation anomaly, the controller controls the accelerator to shut down.

[0019] In one embodiment, a position detection sensor is further included, and the position detection sensor is used to detect whether a shielding door on the shielding body is closed. When the electron accelerator is working, if the position detection sensor detects that the shielding door is not closed, the controller controls the accelerator to close.

[0020] In one of the embodiments, it further includes a first support frame and a second support frame, the first support frame is located above the second support frame, the accelerator is arranged on the first support frame, and the shielding body is arranged on the second support frame.

[0021] In one of the embodiments, the absorption target, the guide rollers on the absorption target support frame, and the beam baffle in the shielding body are all made of stainless steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic structural diagram of a shielding structure for a low-energy self-shielding electron accelerator in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the internal structure;

[0024] Figure 3 for Figure 1 Schematic diagram of the absorption target support frame structure. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0031] like Figure 1-Figure 3 As shown, in one embodiment of the present invention, a shielding structure for a low-energy self-shielding electron accelerator is provided, including an accelerator 60, an extraction window 70, an absorption target support frame 80, an absorption target 90, an irradiated product 110 and a lifting mechanism (not indicated in the figure), wherein the accelerator 60 is connected to the extraction window 70 through a scanning box (not indicated in the figure), the extraction window 70 and the absorption target support frame 80 are both located in the shielding body, the absorption target support frame 80 is located below the extraction window 70, an absorption target 90 is arranged on the absorption target support frame 80, the absorption target 90 is opposite to the titanium window on the extraction window 70 up and down, and the irradiated product 110 irradiated in the shielding body passes between the absorption target 90 and the titanium window; the lifting mechanism is connected to the absorption target support frame 80, and is used to drive the absorption target support frame 80 to approach or move away from the titanium window, so that the absorption target 90 on the absorption target support frame 80 approaches or moves away from the titanium window, and then drives the irradiated product 110 on the absorption target 90 to approach or move away from the titanium window.

[0032] Specifically, Figure 1As shown, the present application also includes a tank body 10, a first support frame 20, a shielding body 30 and a second support frame 40, wherein a plurality of first support legs 201 are arranged on the first support frame 20, a plurality of second support legs 401 are arranged on the second support frame 40, and the first support frame 20 is located above the second support frame 40, the tank body 10 is fixed to the first support frame 20 by bolts, the accelerator 60 is arranged in the tank body 10, the shielding body 30 is fixed to the second support frame 40 by bolts, the lead-out window 70 and the absorption target support frame 80 are both arranged in the shielding body 30, and the absorption target support frame 80 is located below the titanium window on the lead-out window 70, the particle beam ejection port on the accelerator 60 is connected to the scanning box through the accelerating tube 601, and the scanning box is connected to the lead-out window 70, the titanium window on the lead-out window 70 corresponds to the absorption target 90 on the absorption target support frame 80 at the upper and lower sides, and the irradiated product 110 irradiated in the shielding body passes between the absorption target 90 and the titanium window.

[0033] When in use, first start the lifting mechanism, which drives the absorption target support frame 80 to move toward the side away from the titanium window, and then place the irradiated product 110 on the absorption target support frame 80. Then, the lifting mechanism drives the absorption target support frame 80 to move toward the side close to the titanium window, and then drives the irradiated product 110 on the absorption target 90 close to the titanium window. After adjusting the distance between the irradiated product 110 and the titanium window, start the irradiation work.

[0034] In some embodiments, the lifting mechanism includes a motor, a lead screw and a lead screw nut (not indicated in the figure), wherein the motor is fixed in the shielding body 30, the output shaft on the motor faces one side of the titanium window, and the output shaft on the motor is connected to the lead screw through a coupling, the lead screw nut is arranged on the lead screw, and the absorption target support frame 80 is fixed to the lead screw nut. When it is necessary to adjust the distance between the absorption target support frame 80 and the titanium window, it is only necessary to start the motor, and the output shaft on the motor drives the lead screw to rotate, thereby driving the lead screw nut to move on the lead screw, so that the distance between the absorption target support frame 80 and the titanium window can be adjusted.

[0035] Furthermore, the present application includes two lifting mechanisms, which are respectively located on both sides of the absorption target support frame 80. When the distance between the absorption target support frame 80 and the titanium window needs to be adjusted, it is only necessary to start the motors in the two lifting mechanisms at the same time.

[0036] It should be noted that the lifting mechanism in the embodiment of the present application is a motor screw mechanism for example only. In other alternative solutions, other structures may also be used. For example, the lifting mechanism includes an electric telescopic rod or a hydraulic rod, and the electric telescopic rod or the hydraulic rod is used to drive the absorption target support frame to rise or fall. The present application does not impose any special restrictions on the specific structure of the lifting mechanism, as long as the above structure can achieve the purpose of the present application.

[0037] In some embodiments, Figure 3 As shown, in order to facilitate the operation of the irradiated product 110 on the absorption target support frame 80, the present application also includes a plurality of guide rollers 100, which are all arranged on the absorption target support frame 80 to guide the irradiated product 110 to pass through the inlet and outlet of the titanium window in sequence.

[0038] In some embodiments, the present application further includes a cooling mechanism (not shown in the figure) and a first pipe 302 . The cooling mechanism is disposed on the shielding body 30 , and an air inlet of the cooling mechanism is opposite to the titanium window through the first pipe 302 .

[0039] Specifically, the cooling mechanism includes a hair dryer fixed on the outside of the shielding body. The first pipe 302 is a Z-shaped structure. One end of the Z-shaped first pipe 302 is connected to the hair dryer and the other end is opposite to the titanium window, thereby facilitating cooling of the titanium window.

[0040] In some embodiments, the present application also includes an ozone blower and a second pipe 303. The ozone blower is arranged on the outside of the shielding body, and the second pipe 303 is arranged inside the shielding body. The ozone blower is connected to the second pipe 303, so as to facilitate the extraction of ozone in the shielding body from the ozone blower to the outside.

[0041] Furthermore, the second pipe 303 is also a Z-shaped structure, one end of the Z-shaped second pipe 303 is connected to the ozone blower, and the other end is located in the shielding body.

[0042] In some embodiments, the shielding body 30 in the present application is further provided with a shielding door 301 and a door opening mechanism (not shown in the figure), wherein the door opening mechanism cooperates with the shielding door 301 to open or close the shielding door 301 .

[0043] Specifically, the door opening mechanism includes a motor, a lead screw and a lead screw nut. The shielding door 301 is arranged on a slide rail (not shown in the figure) on the second support frame 40. The motor is fixed on the second support frame 40. The output shaft on the motor is connected to the lead screw through a coupling. The lead screw nut is threadedly connected to the lead screw, and the shielding door 301 is fixedly connected to the lead screw nut. When the shielding door 301 needs to be opened, the motor drives the lead screw to rotate, and the lead screw drives the lead screw nut to move along the axial direction of the lead screw, and then the lead screw nut drives the slide rail of the shielding door 301 on the second support frame 40 to move.

[0044] In some embodiments, the present application further includes a controller and a radiation monitor, wherein the controller is connected to the accelerator 60, and the radiation monitor is disposed in the shielding body 30. When the radiation monitor detects radiation anomalies, the controller controls the accelerator 60 to shut down.

[0045] Specifically, the above-mentioned radiation monitor can select a radiation monitor of model RL5000, and the controller is a PLC controller. When the radiation monitor detects abnormal radiation in the shielding body 30, the radiation monitor sends the monitored signal to the PLC controller, and the PLC controller then controls the accelerator 60 to shut down. Among them, the control system of the PLC controller is a product known in the prior art and will not be repeated here.

[0046] In some embodiments, in order to facilitate the inspection of whether the shielding door on the shielding body is closed when the shielding body is working, the present application also includes a position detection sensor, which can be a travel switch. When the electronic accelerator is working, when the travel switch detects that the shielding door is not closed, the controller controls the accelerator to close.

[0047] In some embodiments, in order to facilitate the inspection of the tank body 10, as shown in FIG. Figure 1 As shown, the present application is provided with a staircase 50 between the first support frame 20 and the second support frame 40, one end of the staircase 50 is fixedly connected to the first support frame 20, and the other end is in contact with a horizontal surface. When the tank body 10 needs to be inspected, the tank body 10 can be inspected by climbing up the staircase 50 to the first support frame 20.

[0048] Furthermore, in order to ensure the safety of the staff when inspecting the tank 10 on the first support frame 20, the present application also provides a guardrail 101 around the first support frame 20.

[0049] In some embodiments, the absorption target 90, the guide roller 100 on the absorption target support frame 80, and the beam baffle in the shielding body 30 in the present application are all made of stainless steel.

[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A shielding structure for a low-energy self-shielding electron accelerator, characterized in that: include: accelerator; An outlet window, the accelerator is connected to the outlet window via a scanning box; An absorption target support frame, wherein the lead-out window and the absorption target support frame are both located in the shielding body, the absorption target support frame is located below the lead-out window, an absorption target is arranged on the absorption target support frame, the absorption target is vertically opposite to the titanium window on the lead-out window, and the irradiated product irradiated in the shielding body passes between the absorption target and the titanium window; A lifting mechanism, the lifting mechanism is connected to the absorption target support frame, and is used to drive the absorption target support frame to approach or move away from the titanium window, so that the absorption target on the absorption target support frame approaches or moves away from the titanium window, and further drives the irradiated product on the absorption target to approach or move away from the titanium window; The shielding structure for a low-energy self-shielding electron accelerator further includes an ozone blower and a second pipeline, wherein the ozone blower is arranged outside the shielding body, the second pipeline is arranged inside the shielding body, and the ozone blower is connected to the second pipeline; The particle beam ejection port on the accelerator is connected to the scanning box through an accelerating tube, and the scanning box is connected to the extraction window; The second pipeline is a Z-shaped structure, one end of the Z-shaped second pipeline is connected to the ozone blower, and the other end is located in the shielding body; The shielding body structure for a low-energy self-shielded electron accelerator also includes a tank body, a first support frame, a shielding body and a second support frame, wherein the first support frame is provided with a plurality of the first support legs, the second support frame is provided with a plurality of the second support legs, and the first support frame is located above the second support frame, the tank body is fixed to the first support frame by bolts, the accelerator is arranged in the tank body, and the shielding body is fixed to the second support frame by bolts.

2. The shielding structure for a low-energy self-shielding electron accelerator according to claim 1, characterized in that: It also includes a plurality of guide rollers, which are all arranged on the absorption target support frame and are used to guide the irradiated product to pass through the inlet and outlet of the titanium window in sequence.

3. The shielding structure for a low-energy self-shielding electron accelerator according to claim 1, characterized in that: It also includes a cooling mechanism and a first pipeline. The cooling mechanism is fixed on the shielding body. The first pipeline is arranged in the shielding body. The air inlet of the cooling mechanism is opposite to the titanium window through the first pipeline.

4. The shielding structure for low-energy self-shielding electron accelerator according to claim 3, characterized in that: The cooling mechanism comprises a blower, which is fixed on the outside of the shielding body. The first pipe is a Z-shaped structure, one end of the Z-shaped first pipe is connected to the blower, and the other end is opposite to the titanium window.

5. The shielding structure for low-energy self-shielding electron accelerator according to claim 1, characterized in that: It also includes a shielding door, which is arranged on the shielding body and located on the side of the outlet window.

6. The shielding structure for low-energy self-shielding electron accelerator according to claim 5, characterized in that: It also includes a door opening mechanism, which cooperates with the shielding door to open or close the shielding door.

7. The shielding structure for a low-energy self-shielding electron accelerator according to claim 5, characterized in that: It also includes a controller and a radiation monitor, wherein the controller is connected to the accelerator, and the radiation monitor is arranged on the shielding door. When the radiation monitor detects abnormal radiation, the controller controls the accelerator to shut down.

8. The shielding structure for low-energy self-shielding electron accelerator according to claim 7, characterized in that: It also includes a position detection sensor, which is used to detect whether the shielding door on the shielding body is closed. When the electron accelerator is working, if the position detection sensor detects that the shielding door is not closed, the controller controls the accelerator to close.

9. The shielding structure for a low-energy self-shielding electron accelerator according to claim 1, characterized in that: The accelerator is arranged on the first supporting frame.

10. The shielding structure for a low-energy self-shielding electron accelerator according to any one of claims 1 to 9, characterized in that: The absorption target, the guide roller on the absorption target support frame and the beam baffle in the shielding body are all made of stainless steel.

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