Multi-set diaphragm switching device for supervising ionization chamber

Abstract

The embodiment of the utility model provides a multi-diaphragm switching device for monitoring an ionization chamber. The multi-diaphragm switching device comprises a fixed frame, a movable frame and a driving device, the fixed frame is of a hollow rectangular block structure with a transmission hole in the middle, the movable frame comprises an upper connecting block and a lower movable frame body, the movable frame body comprises a connecting plate and two diaphragm mounting plates which are parallel in the front-back direction, the diaphragm mounting plates are located on the outer sides of the front plate face and the rear plate face of the fixed frame respectively, and the movable frame can move left and right along the fixed frame; a plurality of diaphragm mounting holes are formed in the diaphragm mounting plate in the left-right direction, and a diaphragm is arranged in each diaphragm mounting hole; the execution end of the driving device is connected with the upper connecting block. According to the technical scheme, the multiple sets of diaphragms are configured for monitoring the ionization chamber, and the diaphragms needing to be configured can be put into the preset working positions through the translation action of the driving device, so that automatic switching of the diaphragms is realized, the labor intensity is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ionization radiation measurement, in particular to a diaphragm switching device, and more specifically, to a multi-set diaphragm switching device for a supervision ionization chamber. Background Art

[0002] In an X-ray-based ionization radiation measurement device, a supervision ionization chamber is an important device, which is mainly used to monitor the change of the ray output amount in a reference radiation device and provide monitoring and control signals for a backend detector; and the supervision ionization chamber also needs to be configured with a diaphragm for collimating rays. In the prior art, there are various different models of diaphragms configured for the supervision ionization chamber, and switching is required according to actual needs during application.

[0003] In the process of implementing the present utility model, the inventor found that there are at least the following problems in the prior art:

[0004] In the prior art, when switching the diaphragm, it is necessary to remove the previously used diaphragm, then replace it with a suitable model of diaphragm, and then fasten the new diaphragm. This process all needs to be completed manually, which takes a long time and seriously affects work efficiency. Therefore, how to improve the diaphragm switching efficiency of the supervision ionization chamber is a problem that needs to be solved. Summary of the Utility Model

[0005] The embodiment of the present utility model provides a multi-set diaphragm switching device for a supervision ionization chamber to solve the problems of slow diaphragm switching speed and low efficiency of the existing supervision ionization chamber.

[0006] To achieve the above object, the embodiment of the present utility model provides a multi-set diaphragm switching device for a supervision ionization chamber, including a fixed frame and a movable frame; the fixed frame is a hollow rectangular structure with a transmission hole in the middle, the transmission hole penetrates the front and rear plates of the fixed frame, and the axis of the transmission hole is aligned with the radiation source; a supervision ionization chamber installation groove is also provided in the middle of the fixed frame, and the aperture of the supervision ionization chamber installation groove matches the outer diameter of the supervision ionization chamber; the movable frame includes an upper connecting block and a movable frame body connected below the upper connecting block, the movable frame body includes two diaphragm mounting plates and a connecting plate, the two diaphragm mounting plates are arranged parallel to each other front and back, and the connecting plate is connected to the inner tops of the two diaphragm mounting plates; the two diaphragm mounting plates are respectively located outside the front and rear plates of the fixed frame, and the movable frame can move left and right along the fixed frame; a plurality of diaphragm mounting holes are provided in the diaphragm mounting plates in the left-right direction, and each diaphragm mounting hole penetrates the two diaphragm mounting plates front and back, and a diaphragm is provided in each diaphragm mounting hole; the execution end of the driving device is connected to the upper connecting block.

[0007] Further, the connection lines of the diaphragm holes of each pair of corresponding diaphragms in the front and back directions are on a cone, and the taper of the cone satisfies a preset taper range.

[0008] Further, the multiple sets of diaphragm switching devices for monitoring the ionization chamber further include a device housing, and the device housing is a quadrilateral rectangular frame structure; the fixing frame is fixedly connected to the bottom edge of the device housing; a protruding bottom guide rail is further provided on the inner side of the bottom edge of the device housing, and the bottom guide rail matches the bottom opening of the movable frame body; a top guide wheel is further provided on the inner side of the top edge of the device housing, and a guide groove is further provided on the top surface of the upper connecting block, and the guide groove matches the top guide wheel.

[0009] Further, the multiple sets of diaphragm switching devices for monitoring the ionization chamber further include a cover plate, and the cover plate is detachably connected to the outer side of the diaphragm mounting plate; a plurality of cover plate openings are provided on the cover plate, each cover plate opening is coaxially arranged with the corresponding diaphragm mounting hole, and the aperture of the cover plate opening is smaller than the aperture of the diaphragm mounting hole.

[0010] Further, two groups of diaphragms are arranged on the movable frame in the left - right direction.

[0011] Further, the multiple sets of diaphragm switching devices for monitoring the ionization chamber further include a travel switch, and the travel switch is located on the moving track of the movable frame.

[0012] Further, there are two travel switches in total, and the two travel switches are arranged on the inner side of the top edge of the device housing; when the diaphragm on the right side is coaxial with the transmission hole, the upper connecting block is at the trigger position of the left travel switch; when the diaphragm on the left side is coaxial with the transmission hole, the upper connecting block is at the trigger position of the right travel switch.

[0013] Further, rollers are respectively arranged at the left and right ends of the bottom of the diaphragm mounting plate, and the bottom ends of the rollers are in contact with the inner side surface of the bottom edge of the device housing.

[0014] Further, the driving device includes a motor and a ball screw connected to the output shaft end of the motor; the motor is connected to the outside of the device housing, the ball screw penetrates the upper connecting block in the left - right direction, and the nut pair of the ball screw is connected to the upper connecting block.

[0015] Further, the driving device is a cylinder arranged in the left - right direction, the cylinder is connected to the outside of the device housing, and the piston rod end of the cylinder is connected to the upper connecting block.

[0016] The above - mentioned technical solution has the following beneficial effects:

[0017] In this technical solution, a fixing frame is used to install the monitoring ionization chamber, and multiple sets of diaphragms are configured on the outside of the fixing frame. The multiple sets of diaphragms are integrated into a set of switching devices. When needed, through the translational movement of the driving device, the diaphragm to be configured can be aligned with the center of the monitoring ionization chamber and the radiation source, and reach the predetermined working position. In this way, automatic switching of the diaphragm can be achieved, eliminating the need for on-site operation by the operator, thereby reducing the replacement time, greatly improving the work efficiency, and reducing the labor intensity. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a set of diaphragm switching devices for a monitoring ionization chamber in an embodiment of the present invention;

[0020] Figure 2 It is a schematic structural diagram of a movable frame in an embodiment of the present invention;

[0021] Figure 3 It is a schematic structural diagram of a fixing frame in an embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of the assembly of a diaphragm mounting plate and a diaphragm in an embodiment of the present invention;

[0023] Reference numerals in the drawings: 10, fixing frame; 11, transmission hole; 12, monitoring ionization chamber installation groove; 20, movable frame; 21, upper connecting block; 22, connecting plate; 23, diaphragm mounting plate; 24, diaphragm mounting hole; 25, guiding groove; 26, roller; 27, cover plate; 28, diaphragm; 30, device housing; 31, bottom guide rail; 32, top guide wheel; 33, travel switch; 41, ball screw; 42, motor. Detailed Embodiments

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] Such as Figure 1As shown in the figure, an embodiment of the present utility model provides a multi-set diaphragm switching device for monitoring an ionization chamber, including a fixed frame 10, a movable frame 20, and a driving device; the fixed frame 10 is a hollow rectangular block structure with a transmission hole 11 in the middle, the transmission hole 11 penetrates the front and rear plates of the fixed frame 10, and the axis of the transmission hole 11 is aligned with the radiation source; a circular monitoring ionization chamber installation groove 12 is also provided in the middle of the fixed frame 10, the aperture of the monitoring ionization chamber installation groove 12 matches the outer diameter of the monitoring ionization chamber, and the aperture of the monitoring ionization chamber installation groove 12 is larger than the aperture of the transmission hole 11; the movable frame 20 includes an upper connecting block 21 and a movable frame main body fixedly connected below the upper connecting block 21, the movable frame main body includes two diaphragm mounting plates 23 and a connecting plate 22, the two diaphragm mounting plates 23 are arranged parallel to each other front and back, and the connecting plate 22 is fixedly connected to the inner tops of the two diaphragm mounting plates 23; the two diaphragm mounting plates 23 are respectively located outside the front and rear plates of the fixed frame 10, and the movable frame 20 can move left and right along the fixed frame 10; the diaphragm mounting plates 23 are provided with a plurality of diaphragm mounting holes 24 along the left and right directions in the width direction of the plate surface, and each diaphragm mounting hole 24 penetrates the two diaphragm mounting plates 23 front and back, and different specifications of diaphragms 28 are arranged in each diaphragm mounting hole 24; the execution end of the driving device is connected to the upper connecting block 21.

[0026] To solve the foregoing problems, in this technical solution, first, the fixed frame 10 is used to install the monitoring ionization chamber (not shown in the figure), and then a movable frame 20 is arranged outside the fixed frame 10, and multiple groups of diaphragms 28 (two diaphragms 28 opposite to each other front and back are a group) are arranged on the movable frame 20, and each group of diaphragms 28 is respectively located Figure 3 on the front and back sides of the fixed frame 10 as shown. When a group of diaphragms 28 of a predetermined model is aligned with the transmission hole 11 (that is, aligned with the center of the monitoring ionization chamber), the rays emitted by the radiation source can be emitted along the Figure 4 direction of the hollow arrow as shown. By sending an instruction to the driving device through a control system (not shown in the figure), the driving device can drive the movable frame 20 to move left and right, so as to realize the switching of the diaphragms 28, reduce the labor intensity, and greatly improve the work efficiency.

[0027] Furthermore, as Figure 4 shown, according to the characteristics of the diaphragms 28, it is required that the connecting line of the diaphragm holes of the two corresponding diaphragms 28 in each group is on a virtual cone, and the taper of the cone satisfies a preset taper range, and the taper is usually 6° - 12°.

[0028] Furthermore, as Figure 1 、 Figure 2As shown in the figure, the multiple sets of aperture switching devices for supervising the ionization chamber further include a device housing 30, and the device housing 30 is a quadrilateral rectangular frame structure; the fixing frame 10 is fixedly connected to the bottom edge of the device housing 30; a protruding bottom guide rail 31 is further provided on the inner side of the bottom edge of the device housing 30, and the bottom guide rail 31 matches the bottom opening of the movable frame body; a top guide wheel 32 is further provided on the inner side of the top edge of the device housing 30, and a guide groove 25 is further provided on the top surface of the upper connecting block 21, and the guide groove 25 matches the top guide wheel 32.

[0029] Both the fixing frame 10 and the movable frame 20 are arranged in a device housing 30, and through the device housing 30, the multiple sets of aperture switching devices for supervising the ionization chamber and the ionization chamber for supervision can be installed on the X-ray generator together, so that it can provide services for the X-ray generator. At the same time, the inner side of the frame of the device housing 30 also provides limits on both sides for the movable frame 20, ensuring that the movement range of the movable frame 20 is limited to the inner side of the frame structure.

[0030] Further, as Figure 2 shown in the figure, the multiple sets of aperture switching devices for supervising the ionization chamber further include a cover plate 27, and the cover plate 27 is detachably connected to the outer side of the aperture mounting plate 23; a plurality of cover plate openings are provided on the cover plate 27, and each cover plate opening is coaxially arranged with the corresponding aperture mounting hole 24, and the aperture of the cover plate opening is smaller than the aperture of the aperture mounting hole 24.

[0031] The cover plate 27 is used for the aperture 28 placed in the aperture mounting hole 24. As Figure 2 shown in the figure, after inserting the aperture 28 into the corresponding aperture mounting hole 24, cover the cover plates 27 on both sides on the surfaces of the corresponding aperture mounting plates 23 from the front and back respectively, and fasten the cover plates 27 by means of threaded connection. At this time, since the aperture of the cover plate opening is small, it forms an occlusion effect on the aperture 28 inside it, and the accidental detachment of the aperture 28 can be avoided.

[0032] Further, two sets of the apertures 28 are arranged on the movable frame 20 in the left-right direction.

[0033] In the multiple sets of aperture switching devices for supervising the ionization chamber, multiple sets of apertures 28 can be provided, such as 2 sets, 3 sets, or even more. However, in most cases, two sets of apertures 28 are more in line with the actual requirements. Therefore, in this solution, 4 pieces, that is, two sets of the apertures 28, are preferably configured.

[0034] Further, the multiple sets of aperture switching devices for supervising the ionization chamber further include a travel switch 33, and the travel switch 33 is located on the movement track of the movable frame 20.

[0035] The travel switch 33 is used to determine whether the movable frame 20 has moved to a predetermined position. After the movable frame 20 moves to the predetermined position, the travel switch 33 is triggered, so that the control system feeds back a trigger signal for the control system to make a position judgment.

[0036] Further, there are two travel switches 33 in total, and the two travel switches 33 are arranged on the inner side of the top edge of the device housing 30; when the diaphragm 28 on the right side is coaxial with the transmission hole 11, the upper connecting block 21 is at the trigger position of the left travel switch 33; when the diaphragm 28 on the left side is coaxial with the transmission hole 11, the upper connecting block 21 is at the trigger position of the right travel switch 33.

[0037] For the preferred scheme of the two sets of diaphragms 28 of the foregoing multiple sets of diaphragm switching devices, it is preferably configured with two travel switches 33, and the two travel switches 33 are respectively arranged on both sides of the movable frame 20. After the movable frame 20 moves to the rightmost predetermined position, the right travel switch 33 is triggered, and the control system can confirm that the left set of diaphragms 28 on the movable frame 20 has been aligned with the transmission hole 11 and can enter the working state; when the movable frame 20 moves to the leftmost predetermined position, the left travel switch 33 is triggered, and the control system can confirm that the right set of diaphragms 28 has been aligned with the transmission hole 11.

[0038] Further, rollers 26 are respectively arranged at the left and right ends of the bottom of the diaphragm mounting plate 23, and the bottom ends of the rollers 26 are in contact with the inner side surface of the bottom edge of the device housing 30. After the rollers 26 are provided, the friction during movement can be effectively reduced, thereby improving the service life.

[0039] Further, the driving device includes a motor 42 and a ball screw 41 connected to the output shaft end of the motor 42; the motor 42 is connected to the outside of the device housing 30, the ball screw 41 penetrates through the upper connecting block 21 in the left-right direction, and the nut pair of the ball screw 41 is connected to the upper connecting block 21.

[0040] The driving device can adopt various forms as long as it can push the movable frame 20 to move under the command of the control system, so as to realize the switching of the diaphragm 28. In this technical solution, it is preferably to adopt the form of using the ball screw 41 to push the movable frame 20. At this time, its structure is as Figure 1 shown. A through hole in the left-right direction is opened in the upper connecting block 21, the ball screw 41 is arranged through the through hole, and the nut pair is fixed at both ends of the upper connecting block 21. After that, when the motor 42 rotates, the ball screw 41 can be driven to rotate, thereby pushing the upper connecting block 21 to move left and right.

[0041] Further, in addition to the foregoing manner, the driving device may also adopt a cylinder arranged in the left - right direction. The cylinder is connected to the outside of the device housing 30, and the piston rod end of the cylinder is connected to the upper connecting block 21. When the piston rod extends or retracts, it will drive the upper connecting block 21 to move accordingly.

[0042] In addition, in this technical solution, the installation method of the monitoring ionization chamber is as follows: First, remove the back plate on one side of the fixing frame 10 (the fixing frame 10 can be designed as a split structure including a front plate and a back plate, so that both the front plate and the back plate can be separated from the main body of the fixing frame 10, or only the back plate can be separated from the main body of the fixing frame 10; the front plate and the back plate constitute the front and back sides of the fixing frame 10, and through - holes 11 are provided in the middle of both of them (the through - holes 11 on the front plate and the back plate can be the same or different). The back plate is thread - connected to the fixing frame 10 through a number of threaded holes provided around the installation hole 11 of the monitoring ionization chamber). After stuffing the standardized monitoring ionization chamber into the monitoring ionization chamber installation groove 12 from the back to the front, then install the back plate back. At this time, the front and rear ends of the monitoring ionization chamber are blocked by the front plate and the back plate respectively, so as to fix it.

[0043] In the above - mentioned detailed description, various features are combined in a single embodiment to simplify the present disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than those clearly stated in each claim. On the contrary, as reflected in the appended claims, the present utility model is in a state with fewer features than all the features of the disclosed single embodiment. Therefore, the appended claims are hereby clearly incorporated into the detailed description, where each claim stands alone as a separate preferred embodiment of the present utility model.

[0044] In order for any person skilled in the art to implement or use the present utility model, the above - disclosed embodiments have been described. For those skilled in the art, various modification methods of these embodiments are obvious, and the general principles defined herein can also be applied to other embodiments without departing from the spirit and protection scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0045] The specific embodiments described above have further elaborated on the purpose, technical solution, and beneficial effects of the present utility model. It should be understood that the above - mentioned are only specific embodiments of the present utility model, and are not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A multi-set of diaphragm switching devices for monitoring ionization chambers, characterized in that, It includes a fixed frame (10), a movable frame (20), and a driving device; the fixed frame (10) is a hollow rectangular block structure with a transmission hole (11) in the middle, the transmission hole (11) penetrates the front and rear surfaces of the fixed frame (10), and the axis of the transmission hole (11) is aligned with the radiation source; there is also a monitoring ionization chamber installation groove (12) in the middle of the fixed frame (10), and the aperture of the monitoring ionization chamber installation groove (12) matches the outer diameter of the monitoring ionization chamber; the movable frame (20) includes an upper connecting block (21) and a movable frame main body fixedly connected below the upper connecting block (21), the movable frame main body includes two diaphragm mounting plates (23) and a connecting plate (22), the two diaphragm mounting plates (23) are arranged parallel to each other front and back, and the connecting plate (22) is fixedly connected to the inner tops of the two diaphragm mounting plates (23); the two diaphragm mounting plates (23) are respectively located outside the front and back plates of the fixed frame (10), and the movable frame (20) can move left and right along the fixed frame (10); the diaphragm mounting plates (23) are provided with a plurality of diaphragm mounting holes (24) in the left-right direction, and each diaphragm mounting hole (24) penetrates the two diaphragm mounting plates (23) front and back, and a diaphragm (28) is arranged in each diaphragm mounting hole (24); the execution end of the driving device is connected to the upper connecting block (21).

2. The multiple sets of diaphragm switching devices for monitoring ionization chambers according to claim 1, characterized in that, The connection lines of the diaphragm holes of each pair of front and rear corresponding diaphragms (28) are on a cone, and the taper of the cone meets the preset taper range.

3. The multiple sets of diaphragm switching devices for monitoring ionization chambers according to claim 1, characterized in that, It further includes a device housing (30), and the device housing (30) is a quadrilateral rectangular frame structure; the fixed frame (10) is fixedly connected to the bottom edge of the device housing (30); there is also a protruding bottom guide rail (31) on the inner side of the bottom edge of the device housing (30), and the bottom guide rail (31) matches the bottom opening of the movable frame main body; there is also a top guide wheel (32) on the inner side of the top edge of the device housing (30), and a guide groove (25) is also provided on the top surface of the upper connecting block (21), and the guide groove (25) matches the top guide wheel (32).

4. The multiple sets of diaphragm switching devices for monitoring ionization chambers according to claim 3, characterized in that, It further includes a cover plate (27), and the cover plate (27) is detachably connected to the outer side surface of the diaphragm mounting plate (23); a plurality of cover plate openings are provided on the cover plate (27), each cover plate opening is coaxially arranged with the corresponding diaphragm mounting hole (24), and the aperture of the cover plate opening is smaller than the aperture of the diaphragm mounting hole (24).

5. The multi-set diaphragm switching device for monitoring an ionization chamber according to claim 3, wherein Two groups of diaphragms (28) are arranged on the movable frame (20) in the left-right direction.

6. The multi-set diaphragm switching device for monitoring an ionization chamber according to claim 5, characterized in that, It further includes a travel switch (33), and the travel switch (33) is located on the movement track of the movable frame (20).

7. The multi-set diaphragm switching device for monitoring an ionization chamber according to claim 6, wherein, There are two travel switches (33) in total, and the two travel switches (33) are arranged on the inner side of the top edge of the device housing (30); when the diaphragm (28) on the right side is coaxial with the transmission hole (11), the upper connecting block (21) is at the triggering position of the left travel switch (33); when the diaphragm (28) on the left side is coaxial with the transmission hole (11), the upper connecting block (21) is at the triggering position of the right travel switch (33).

8. The multi-set diaphragm switching device for monitoring an ionization chamber according to claim 3, characterized in that Rollers (26) are respectively arranged at the left and right ends of the bottom of the diaphragm mounting plate (23), and the bottom ends of the rollers (26) are in contact with the inner side surface of the bottom edge of the device housing (30).

9. The multi-set diaphragm switching device for monitoring an ionization chamber according to claim 3, wherein, The driving device includes a motor (42) and a ball screw (41) connected to the output shaft end of the motor (42); the motor (42) is connected to the outside of the device housing (30), the ball screw (41) penetrates through the upper connecting block (21) in the left-right direction, and the nut pair of the ball screw (41) is connected to the upper connecting block (21).

10. The multi-set diaphragm switching device for monitoring an ionization chamber according to claim 3, characterized in that, The driving device is a cylinder arranged in the left-right direction, the cylinder is connected to the outside of the device housing (30), and the piston rod end of the cylinder is connected to the upper connecting block (21).

Images