Beam-limiting attachment filter

Abstract

The utility model belongs to the technical field of beam limiter, specifically relates to a beam limiter additional filter device, including filter assembly and motor, filter assembly includes the base plate, one end of base plate is equipped with the mounting hole, is equipped with the filter piece on the mounting hole, the other end of base plate is equipped with the shaft sleeve, the shaft sleeve is connected with motor, and motor is used for driving base plate to rotate with the shaft sleeve as the center, when using, make filter piece cover the ray export of beam limiter through motor drive filter assembly rotation, filter harmful rays, simple, fast, and the whole device structure is simple, small, can save the installation space, is favorable to the miniaturization design of beam limiter.

Description

Technical Field

[0001] This utility model belongs to the field of beam limiter technology, specifically relating to a beam limiter with an additional filtering device. Background Technology

[0002] Diagnostic X-rays are a continuous spectrum of mixed radiation. When X-rays pass through the human body, most of the low-energy rays are absorbed by tissues, increasing the skin's radiation dose. Therefore, it is necessary to pre-absorb the low-energy components of the X-ray beam, a process known as X-ray filtration. X-ray filtration includes intrinsic filtration and additional filtration. Intrinsic filtration refers to the filtration of the X-ray machine itself, whose main function is to filter out the low-energy components of the X-ray beam, increasing the average energy of the X-rays. This helps reduce the damage of unwanted low-energy photons to the skin and superficial tissues, and also helps improve the quality of X-ray images. Additional filtration refers to the filter plate attached between the X-ray tube window and the subject. Its main function is to further reduce the damage of low-energy photons to the skin and superficial tissues. By increasing the thickness of the additional filter plate, the low-energy components in the X-ray beam can be effectively reduced, thereby reducing the subject's incident surface dose.

[0003] Utility model patent CN 202604871 U discloses a filter switching device for an X-ray machine beam limiter, including a mounting base and at least one filter disposed above the X-ray outlet of the mounting base. The mounting base is installed in a housing above the X-ray outlet of the X-ray machine beam limiter. Medical personnel need to manually control the filter base to move along the rotating shaft to move the filter directly above the X-ray outlet of the beam limiter to filter harmful rays. The filter base is limited by slots and holes to prevent it from colliding with other components of the X-ray beam limiter during movement, thereby improving the filtration accuracy of harmful rays and reducing the probability of misdiagnosis caused by medical devices. However, this switching device can only switch filters manually, which is cumbersome to operate and has a relatively complex structure, which is not conducive to the miniaturization design of the beam limiter. Utility Model Content

[0004] The purpose of this invention is to provide an additional filtering device for a beam limiter, so as to at least solve the problems in the prior art.

[0005] This utility model provides the following technical solution:

[0006] A filter device for a limiter includes a filter assembly and a motor. The filter assembly includes a substrate, one end of which has a mounting hole on which a filter is disposed, and the other end of which has a bushing connected to a motor. The motor is used to drive the substrate to rotate around the bushing.

[0007] Furthermore, a counterweight is connected to the bushing, which is used to balance the center of gravity.

[0008] Furthermore, it also includes a control component, which includes a controller and a sensing element. The controller is electrically connected to the sensing element and the motor. A positioning plate is formed on the substrate. The sensing element is used to detect the position of the positioning plate and send a signal to the controller. The controller is used to receive the signal from the sensing element and control the start or stop of the motor.

[0009] Furthermore, the substrate is provided with weight-reduction holes.

[0010] Furthermore, the substrate is made of aluminum alloy.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects:

[0012] 1. Compared with existing switching devices that require manual operation, this utility model uses a motor to rotate the substrate during use, so that the filter is rotated directly above the beam exit of the beam limiter. The operation is simple, convenient and quick. Furthermore, through the cooperation of the controller, sensing element and positioning plate, the filter can be precisely positioned so that it accurately covers the beam exit of the beam limiter, filtering out harmful rays and effectively reducing the low-energy cost of the X-ray beam, thereby reducing the surface dose of the subject.

[0013] 2. By setting a counterweight, this utility model makes the center of gravity of the filter device coincide with the center of rotation of the drive, which can reduce the swaying inertia of the filter device when the limiter moves or deflects, reduce the rotational drive torque of the filter device, and avoid swaying impact when the limiter moves or deflects after power failure.

[0014] 3. The substrate of this utility model effectively reduces the weight of the filter assembly by setting a weight-reducing hole structure and using lightweight aluminum alloy material, which greatly reduces the driving force for the rotation of the filter assembly. A small motor can be selected, which not only reduces costs, but also saves the installation space of the speed limiter, reduces the product size, and is conducive to the miniaturization design of the limiter. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an exploded view of the present invention;

[0017] Figure 3 This is a schematic diagram showing the state of the filter element cut out according to this utility model;

[0018] In the figure: substrate 1, mounting hole 11, positioning plate 12, weight reduction hole 13, filter 2, bushing 3, motor 4, counterweight 5, sensing element 6. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method:

[0020] Example

[0021] like Figure 1-3 As shown, a clamp limiter with an additional filter includes a filter assembly, a motor 4, and a control assembly.

[0022] The filtration assembly includes a substrate 1, one end of which has a mounting hole 11, on which a filter element 2 is fixed. The other end of the substrate 1 is provided with a bushing 3, which is fixed on the output shaft of a motor 4. The motor 4 is used to drive the substrate 1 to rotate around the bushing 3. In use, the motor 4 can drive the substrate 1 to rotate, so that the filter element 2 rotates to be directly above the beam exit of the beam limiter. The operation is simple, convenient and quick.

[0023] A counterweight 5 is fixed to the bushing 3 by screws. The counterweight 5 is used to balance the center of gravity, so that the center of gravity of the filter device coincides with the center of rotation. This can reduce the swaying inertia of the filter device when the limiter moves or deflects, reduce the rotational driving torque of the filter device, and avoid swaying impact when the limiter moves or deflects after power failure.

[0024] The control assembly includes a controller and a sensing element 6. The controller is electrically connected to the sensing element 6 and the motor 4. A positioning plate 12 is formed on the substrate 1. The sensing element 6 detects the position of the positioning plate 12 and sends a signal to the controller. The controller receives the signal from the sensing element 6 and controls the start or stop of the motor 4. Figure 1 As shown, when the filter element 2 is in the loaded state, the positioning plate 12 moves away from the sensing element 6, such as... Figure 3 As shown, when the filter 2 is in the cut-out state, the positioning plate 12 approaches the sensing element 6. Through the cooperation of the controller, the sensing element 6, and the positioning plate 12, the filter 2 is accurately positioned, so that the filter 2 can accurately cover the X-ray exit of the beam limiter, filter harmful rays, effectively reduce the low-energy cost in the X-ray beam, and thus reduce the surface dose of the subject.

[0025] To meet the lightweight design requirements of the filtration device, the substrate 1 in this embodiment is made of lightweight aluminum alloy, and weight reduction holes 13 are opened on the substrate 1, so that the overall weight of the filtration assembly is about 0.036kg, which greatly reduces the driving force for the rotation of the filtration assembly. A small motor can be selected, which not only reduces costs, but also saves the installation space of the speed limiter, reduces the product size, and is conducive to the miniaturization design of the limiter.

[0026] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A filter device attached to a beam limiter, characterized in that: The filter assembly includes a filter assembly and a motor (4). The filter assembly includes a substrate (1). One end of the substrate (1) is provided with a mounting hole (11) and a filter plate (2) is provided on the mounting hole (11). The other end of the substrate (1) is provided with a bushing (3). The bushing (3) is connected to the motor (4). The motor (4) is used to drive the substrate (1) to rotate around the bushing (3).

2. The additional filtering device for the beam limiter according to claim 1, characterized in that: A counterweight (5) is connected to the bushing (3), and the counterweight (5) is used to balance the center of gravity.

3. The additional filtering device for the beam limiter according to claim 1 or 2, characterized in that: It also includes a control component, which includes a controller and a sensing element (6). The controller is electrically connected to the sensing element (6) and the motor (4). A positioning plate (12) is formed on the substrate (1). The sensing element (6) is used to detect the position of the positioning plate (12) and send a signal to the controller. The controller is used to receive the signal from the sensing element (6) and control the start or stop of the motor (4).

4. The additional filtering device for the beam limiter according to claim 3, characterized in that: The substrate (1) is provided with weight reduction holes (13).

5. The additional filtering device for the beam limiter according to claim 4, characterized in that: The substrate (1) is made of aluminum alloy.

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