Shielding device for X-ray detector

Abstract

The utility model provides a shielding device for an X-ray detector, and belongs to the field of laboratory instruments. The device comprises a moving mechanism, a counterweight mechanism and a shielding mechanism, wherein the moving mechanism comprises a supporting base, a lifting platform, an X-direction translation platform and a Y-direction translation platform; the moving mechanism is formed by threaded connection of mounting panels on all parts of the moving mechanism; the counterweight mechanism comprises a counterweight block, a rib plate and a shielding plate supporting bottom plate; the shielding mechanism comprises a protection assembly, a moving assembly, a limiting circuit board and a data transmission port. The beneficial effects of the utility model are that the whole device is small in size and convenient to assemble and debug, can move in three directions through the moving mechanism, and is suitable for most detectors; a double-screw and shutter type structure is adopted, the response speed is high, a ray window can be rapidly opened or closed, the detector can be conveniently and effectively protected, and the service life of the detector is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of laboratory instrument, concretely relates to a shielding device for X ray detector. BACKGROUND

[0002] X ray detection instrument is widely used in medical, biology, material, food science and other application fields and material structure research and other scientific research fields. The X ray detection instrument widely used at present includes ionization chamber, scintillator photomultiplier tube and various types of detectors. Among them, the photon technology type detector has the ability of single photon detection, and the signal-to-noise ratio is better than that of other types of X ray detectors, although the price is expensive, but has been applied to X ray scattering, X ray diffraction and other numerous experimental methodologies. The pixel unit of the X ray photon counting type detector is particularly sensitive, if it is irradiated for a long time, the pixel unit will be damaged by radiation, resulting in bad points and reducing the service life of the detector. Therefore, the detector shielding mechanism is responsible for protecting the pixel unit of the detector from X ray irradiation. The commonly used shielding mechanism uses stainless steel plate (or tungsten plate, lead plate and other heavy metal plate) to be placed in front of the detector, which is used to absorb X ray and reduce the radiation damage of the detector.

[0003] At present, the shielding door commonly used in conventional X ray detectors generally uses a pneumatic cylinder as an actuator. The impact force of the pneumatic cylinder during the opening and closing of the shielding door will cause obvious vibration, which affects the resolution of the subsequent X ray detector image acquisition. Or use the transmission mode of stepper motor and screw to move the shielding door up and down. This scheme takes too long to stabilize when the shielding door is opened and closed, so the user needs to wait for a period of time before starting to collect data. Moreover, its device is large, which requires a large installation space, and is not suitable for installation in small light source stations or laboratories with limited space. The time required for opening and closing is also relatively long, which cannot quickly open and close the shielding mechanism, reducing the experimental efficiency. UTILITY MODEL CONTENT

[0004] The utility model provides a shielding device for X ray detector to solve the shielding device starting slow, long movement time, unable to respond quickly mentioned above. The shielding mechanism occupies large area, and the installation and debugging are complex. It cannot be flexibly adjusted to install the position, so that the experimental instrument installation must be calculated and designed many times. The technical scheme of the utility model is as follows:

[0005] A shielding device for an X-ray detector, comprising a moving mechanism, a counterweight mechanism, a shielding mechanism, the moving mechanism comprising a support base, a lifting platform, an X-direction translation platform and a Y-direction translation platform; the moving mechanism is composed of threaded connection of mounting panels on each component; the counterweight mechanism comprises a counterweight block, a rib plate and a shielding door support base plate; the shielding mechanism comprises a protection assembly, a moving assembly, a limiting circuit board and a data transmission port; the protection assembly comprises a shielding door protection plate, a shielding door rear panel, a shielding door guide rail seat, a moving plate, a stainless steel plate and a support column; the moving assembly comprises a guide rail, a nut seat, a bearing seat, a lead screw, a lead screw nut, a motor and a coupling; the guide rail is threaded connected with the shielding door guide rail seat, the stainless steel plate is threaded connected with the moving plate, and then threaded connected with the slider on the guide rail through a screw; the motor is installed on the shielding door guide rail seat, the transmission shafts at both ends are connected with the lead screws on both sides through the coupling, the lead screws are fixed in position through the bearing seat installed on the shielding door guide rail seat; one end of the nut seat is fixed on the moving plate, and the other end is installed on the lead screw and fixed in position through the lead screw nut.

[0006] Further, the moving assembly is an integral whole, and each component of the assembly is connected and used through a screw to support and drive the counterweight mechanism to move in X, Y and Z directions. The bottom of the moving assembly is a support base, a lifting platform is installed above the support base, an X-direction translation platform is installed above the lifting platform, and a Y-direction translation platform is installed above the X-direction translation platform. The installation sequence of the lifting platform, the X-direction translation platform and the Y-direction translation platform is not fixed, and they can be installed and used according to actual needs or only the displacement platform or the lifting platform corresponding to the required moving direction can be installed according to experimental needs, and the installation design is specific to the requirements of the experiment. The moving mechanism is composed of threaded connection of mounting panels on each component.

[0007] Further, the counterweight mechanism is installed above the moving mechanism through threaded connection. The number of counterweight blocks is reasonably matched and assembled according to the weight of the shielding mechanism. There are threaded connection holes between the counterweight blocks, the shielding door support base plate and the counterweight blocks. The size and position of the holes are reasonably designed according to experimental needs. There are through holes on the rib plate for threaded connection with the shielding door support base plate. The size and position of the through holes are reasonably designed according to the position of other holes on the shielding door support base plate. There are also through holes on the rib plate for threaded connection with the shielding door guide rail seat to support the shielding door guide rail seat and ensure its smoothness. There are through holes on the shielding door support base plate for threaded connection with the rib plate, the counterweight block and the moving mechanism. The hole positions are reasonably designed so that there is no interference between the holes. The front end of the shielding door support base plate supports the shielding door guide rail seat.

[0008] Further, the shielding door protection plate has a through hole for threaded connection with the bearing seat, and the shielding door protection plate is threaded with the bearing seat to protect the safe operation of the lead screw. The shielding door rear panel has a through hole for threaded connection with the support column, and the size of the through hole in the shielding door rear panel is the same as that of the through hole in the shielding door guide rail seat, facilitating installation and use, and protecting the moving plate and the stainless steel plate from external damage. The length of the support column is customized according to actual experimental requirements and installation requirements.

[0009] Further, the shielding door guide rail seat has a slot for mounting a guide rail, and a through hole for threaded connection with the guide rail is reserved in the slot. It should be noted that the guide rail can also be directly installed on the guide rail seat by means of threading, welding, gluing and the like according to actual requirements. The shielding door guide rail seat has a hole site for threaded connection with the moving plate, the rib plate, the support column, the bearing seat, the motor and the data transmission port. The hole site position of the shielding door guide rail seat is reasonably designed, and no part interference problem will occur. The shielding door guide rail seat has a through hole in the middle position for the passage of radiation.

[0010] Further, the moving plate has a hole site for threaded connection with the shielding door guide rail seat and a hole site for threaded connection with the stainless steel plate, and a hole site for threaded connection with the nut seat is reserved at the lower end of the moving plate, so that when the lead screw drives the nut seat to move left and right, the nut seat drives the moving plate to move. The side of the moving plate facing the shielding door guide rail seat has a slot for clamping the slider, and a through hole is punched at the corresponding position of the slot to facilitate threaded connection with the slider.

[0011] Further, the support column is a cylindrical body with holes at both ends, which connects the shielding door guide rail seat and the shielding door rear panel together, and leaves a moving height for the moving plate and the stainless steel plate. In this way, different support column heights can be selected according to the intensity of the radiation to meet the installation requirements of stainless steel plates of different thicknesses.

[0012] Further, one end of the nut seat is provided with a through hole, the lead screw nut is inserted into the through hole, and the position is fixed by a screw. The movement of the lead screw is transmitted to the nut seat through the lead screw nut, driving the nut seat to move left and right. The other end of the nut seat has a hole site for threaded connection with the moving plate, and the movement of the nut plate is transmitted to the moving plate.

[0013] Further, the bearing seat has a hole site on the side facing the shielding door guide rail seat and on the side facing the shielding door rear panel, facilitating threaded connection with the shielding door guide rail seat and the shielding door rear panel and fixing the position. The bearing seat has a bearing embedded therein. The size of the bearing is adapted to the size of the lead screw, and the size of the bearing seat is adapted to the size of the bearing.

[0014] Further, the limiting circuit board is installed on the shielding door guide rail seat through screws, the limiting circuit board is matched with the nut seat through the nut seat, and the movement range of the nut seat is limited to ensure that the movement range of the movement plate is controlled.

[0015] Further, the motor is installed on the shielding door guide rail seat, a shaft coupling is installed on the transmission shaft at both ends of the motor and connected with the two side screws, the size of the screw is customized according to experimental requirements; the relative position of the screw is fixed through the bearing seat, and the relative position of the nut seat is fixed through the screw nut installed on the screw, when the screw moves, the screw nut moves left and right, so that the nut seat moves left and right and drives the movement plate fixed at the other end to move, and the opening and closing function of the movement plate is completed.

[0016] The benefits of the utility model are:

[0017] (1) The overall device is small in size, convenient to assemble and debug, can be moved in three directions through the moving mechanism after installation, adapts to the emission of the ray source, is convenient for adapting different experiments to emit different rays in different directions, and adapts to most detectors.

[0018] (2) The utility model adopts double screws and a shutter type structure, has high response speed, can quickly open or close the ray window, is convenient for effectively protecting the detector and prolonging the service life of the detector.

[0019] (3) In the protective device, the metal plate is blocked in front of the X-ray optical detector when it is idle, good protection of the X-ray optical detector is realized, and damage caused by external force impact is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a shielding device for an X-ray detector.

[0021] Figure 2 It is a counterweight mechanism schematic view of a shielding device for an X-ray detector.

[0022] Figure 3 It is a shielding mechanism schematic view of a shielding device for an X-ray detector.

[0023] In the figure: 1 - support base, 2 - lifting platform, 3 - X direction translation platform, 4 - Y direction translation platform, 5 - counterweight mechanism, 6 - shielding mechanism, 501 - counterweight block, 502 - rib plate, 503 - shielding door support bottom plate, 601 - shielding door protection plate, 602 - shielding door back plate, 603 - shielding door guide rail seat, 604 - guide rail, 605 - moving plate, 606 - stainless steel plate, 607 - support column, 608 - nut seat, 609 - data line plug, 610 - data transmission port, 611 - bearing seat, 612 - lead screw, 614 - lead screw nut, 615 - limit circuit board, 616 - motor, 617 - coupling. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0025] In the following description of the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0026] As Figure 1 shown in a shielding device schematic diagram for an X-ray detector, which includes a moving mechanism, a counterweight mechanism, a shielding mechanism, the moving mechanism includes a support base 1, a lifting platform 2, an X direction translation platform 3 and a Y direction translation platform 4; the counterweight mechanism 5 includes a counterweight block 501, a rib plate 502 and a shielding door support bottom plate 503. Among the four components of the moving mechanism, the support base 1 style is not unique, the style shown in the figure only represents its role of supporting the device above, the support base 1 is fixed on an optical platform or other installation platform, the platform is the platform for installing the detector, the lifting platform 2, the X direction translation platform 3 and the Y direction translation platform 4 can also be installed on the optical platform or other installation platform according to the experimental requirements, and the relative positions of the lifting platform 2, the X direction translation platform 3 and the Y direction translation platform 4 can also be reasonably assembled according to the experimental requirements.

[0027] According to Figure 1 shown in the embodiment, the shielding door support bottom plate 503 in the counterweight mechanism 5 is installed on the Y direction translation platform 4, as Figure 2As shown, the rib plate 502 is then installed on the base plate of the shielding door support. The bottom end of the shielding door guide rail seat 603 is placed on the base plate 503 of the shielding door support, and the front of the shielding door guide rail seat 603 is pressed tightly against the rib plate 502. The shielding door guide rail seat 603 and the rib plate 502 are then threaded together with screws to fix the relative position of the shielding door guide rail seat 603. Figure 2 The shielding door support base plate 503 shown has through holes for threaded connection with the moving mechanism, rib plate 502 and counterweight block 501.

[0028] like Figure 3 The shielding mechanism 6 shown is a schematic diagram of the assembly of the shielding door protective plate 601 and the rear panel 602 of the shielding door without installation. Figure 3 As shown, the shielding mechanism 6's shielding door guide rail seat 603 acts similarly to a fixing plate. The mechanisms in the shielding mechanism 6 are installed on the shielding door guide rail seat 603, which has slots for mounting the guide rail and through holes for threaded fixing to the guide rail 604, support column 607, bearing seat 611, motor 616, and rib plate 502. After the guide rail 604 is installed on the shielding door guide rail seat 603, the slider (not shown in the figure) is embedded into the corresponding groove of the moving plate 605 and fixed with screws. The stainless steel plate 606 is then fixed to the front surface of the moving plate 605 with screws. The three components together form a single mechanism installed on the guide rail 604. After the motor 616, bearing seat 611, lead screw 612, lead screw nut 614, and nut seat 608 fitted on the lead screw nut 614 are installed, the lead screw nut 614 and nut seat 608 are fixed with screws, and the nut seat 608 and moving plate 605 are fixed with screws. The drive shaft on the motor 616 is then connected to the lead screw 612 via coupling 617. The limit circuit board 615 is fixed to the corresponding position on the shielded door guide rail base 603 with screws to limit the movement range of the nut seat 608, thereby limiting the movement range of the moving plate 605. The data transmission port 610 is fixed to the shielded door guide rail base 603 with screws for signal transmission. The motor 616 is used to drive the lead screws 612 on both sides to rotate simultaneously, thereby completing the movement of the moving plate 605 and the stainless steel plate 606. Other motors or mechanisms that can achieve the same purpose can also be used interchangeably.

[0029] In actual use, the moving mechanism can increase or decrease corresponding moving devices according to experimental requirements or work requirements. The counterweight mechanism 5 is moved by adjusting the moving mechanism installed thereon, which drives the shielding mechanism 6 carried by the counterweight mechanism 5 to move, aligns the center through hole of the shielding door guide rail seat 603 with the ray path, and makes the ray pass through the through hole. When opening, signals are transmitted through the data transmission port 610, the motor 616 operates, the lead screw 612 drives the nut seat 608 to move the moving plate 605, the range is limited by the limiting circuit board 615, the shielding door guide rail seat 603 and the shielding door rear panel 602 are opened, the light passes through the through hole of the shielding door guide rail seat 603 and the shielding door rear panel 602 and irradiates on the detector. When closing, signals are transmitted through the data transmission port 610, the motor 616 operates, the lead screw 612 drives the nut seat 608 to move the moving plate 605, the range is limited by the limiting circuit board 615, the shielding door guide rail seat 603 and the shielding door rear panel 602 are closed, and the light is blocked by the moving plate 605 and the stainless steel plate 606.

[0030] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A shielding device for an X-ray detector, characterized in that: The application relates to a shielding device, which comprises a moving mechanism, a counterweight mechanism and a shielding mechanism, wherein the moving mechanism comprises a support base, a lifting platform, an X-direction translation platform and a Y-direction translation platform; the moving mechanism is composed of mounting panels on each part through screw connection; the counterweight mechanism comprises a counterweight block, a rib plate and a shielding plate support base; the shielding mechanism comprises a protection assembly, a moving assembly, a limiting circuit board and a data transmission port; the protection assembly comprises a shielding door protection plate, a shielding door back plate, a shielding door guide rail base, a moving plate, a stainless steel plate and a support column; the moving assembly comprises a guide rail nut base, a bearing seat, a screw rod, a screw rod nut, a motor and a coupling; the guide rail is screw-connected with the shielding door guide rail base; the stainless steel plate is screw-connected with the moving plate, and then screw-connected with the slider on the guide rail through a screw; the motor is installed on the shielding door guide rail base; the two end transmission shafts are connected with the two screw rods through the coupling; the screw rod is fixed in position through the bearing seat installed on the shielding door guide rail base; one end of the nut base is fixed on the moving plate, and the other end is installed on the screw rod and fixed in position through the screw rod nut.

2. A shielding device for an X-ray detector according to claim 1, characterized in that: The moving assembly is an entirety, and each part is connected through a screw for use, so as to support and drive the counterweight mechanism to move in X, Y and Z directions; the moving assembly is installed in sequence from bottom to top as the support base, the lifting platform, the X-direction translation platform and the Y-direction translation platform; the installation sequence of the lifting platform, the X-direction translation platform and the Y-direction translation platform is not fixed.

3. A shielding device for an X-ray detector according to claim 1, characterized in that: The number of the counterweight blocks is reasonably matched and assembled according to the weight of the shielding mechanism; the counterweight block is provided with a threaded hole for screw connection with the shielding door support base and the counterweight block; the rib plate is provided with a through hole for screw connection with the shielding door support base and the shielding door guide rail base; the shielding door support base is provided with a through hole for screw connection with the rib plate, the counterweight block and the moving mechanism.

4. A shielding device for an X-ray detector according to claim 1, characterized in that: One end of the nut base is provided with a through hole, the screw rod nut is inserted into the through hole, and the position is fixed through a screw; the other end of the nut base is provided with a threaded hole for screw connection with the moving plate.

5. A shielding device for an X-ray detector according to claim 1, characterized in that: The support column is a cylinder with holes at two ends, which connects the shielding door guide rail base and the shielding door back plate together.

6. A shielding device for an X-ray detector according to claim 1, characterized in that: The moving plate is provided with a threaded hole for screw connection with the shielding door guide rail base and a threaded hole for screw connection with the stainless steel plate; a threaded hole for screw connection with the nut base is reserved at the lower end of the moving plate; the side of the moving plate facing the shielding door guide rail base is provided with a slot for clamping the slider, and a through hole is punched at the corresponding position of the slot.

7. A shielding device for an x-ray detector as defined in claim 1, characterized in that: The side of the bearing seat facing the shielding door guide rail base is provided with a hole, and the side facing the shielding door back plate is also provided with a hole.

8. A shielding device for an X-ray detector according to claim 1, characterized in that: The shielding door guide rail base is provided with a slot for mounting the guide rail, and a through hole for screw connection with the guide rail is reserved in the slot; the shielding door guide rail base is provided with a threaded hole for screw connection with the moving plate, the rib plate, the support column, the bearing seat, the motor and the data transmission port, and a through hole is punched in the middle position of the shielding door guide rail base for the radiation to pass through.

Images