CN116403751B - Radiation shielding device of radioactive source - Google Patents
Radiation shielding device of radioactive source Download PDFInfo
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- CN116403751B CN116403751B CN202310299458.0A CN202310299458A CN116403751B CN 116403751 B CN116403751 B CN 116403751B CN 202310299458 A CN202310299458 A CN 202310299458A CN 116403751 B CN116403751 B CN 116403751B
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- 230000005855 radiation Effects 0.000 title claims abstract description 40
- 230000002285 radioactive effect Effects 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 208000019155 Radiation injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F5/00—Transportable or portable shielded containers
- G21F5/06—Details of, or accessories to, the containers
- G21F5/12—Closures for containers; Sealing arrangements
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F5/00—Transportable or portable shielded containers
- G21F5/02—Transportable or portable shielded containers with provision for restricted exposure of a radiation source within the container
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- High Energy & Nuclear Physics (AREA)
- Measurement Of Radiation (AREA)
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Abstract
A radiation shielding device of a radioactive source comprises a base member, a first driving member, a linkage member and a rotating member, wherein the base member is hinged with the rotating member to form a first hinged position, the linkage member is respectively hinged with the rotating member and the first driving member to form corresponding second and third hinged positions, and the first driving member drives the third hinged position to move between a first state position and a second state position with a preset stroke d; in the reference plane, the projection connecting line of the first hinge position and the second hinge position is a first straight line, the projection connecting line of the second hinge position and the third hinge position is a second straight line with a preset distance L, and the projection of the movement track of the third hinge position is a third straight line; the third hinging position moves to the first state position, and an included angle beta between the second straight line and the third straight line meets cosbeta >0; the third hinge position moves to the second state position, an included angle alpha formed by the second straight line and the third straight line meets cos alpha > d/2L, and an included angle gamma between the first straight line and the second straight line meets gamma < pi. By partially overlapping the movement space of the shield cover with the height space of the shield case, occupation of the limited space is reduced.
Description
Technical Field
The invention relates to the technical field of radiation protection, in particular to a radiation shielding device of a radioactive source.
Background
It is known that a radiation source is required in the measurement process of a battery pole piece or a thin film material, and in view of the fact that the radiation source has natural radioactivity, the radiation source is often packaged in a shielding box, and radiation can be emitted to a specific direction by means of a radiation hole reserved in the shielding box. However, in the measurement process, the radiation source is not required to be in a working state all the time, and the radiation port is required to be sealed for safety so as to realize the omnibearing shielding of the radiation source; if the ray port is closed manually, radiation injury to human body is unavoidable; therefore, how to realize the automatic closing of the ray port becomes the research focus in the industry.
In the prior art, patent document with application number of cn2015142014. X discloses a radiation-proof box of a radioactive source, wherein the radiation-proof box pushes the shielding box to lift by means of a lifting cylinder arranged below the shielding box so as to adjust the distance between the radioactive source and an object to be detected; on the other hand, the lead cover is driven to rotate on the ray port of the shielding box by virtue of the rotary cylinder arranged on one side of the jacking cylinder, so that the ray port is opened and closed. However, in this solution, not only a longitudinal space needs to be reserved for the lifting movement of the shielding box, but also a transverse space needs to be reserved for the horizontal rotation of the lead cover, which also results in a large installation space or movement space for the radiation protection box when in use.
Disclosure of Invention
The invention mainly solves the technical problem of providing a radiation shielding device of a radioactive source so as to achieve the purpose of reducing occupied space.
In one example, there is provided a radioactive source radiation shielding device comprising:
a base member;
a rotating member for connecting the shield cover, the rotating member being hinged to the base member and forming a first hinge position at a hinge position with each other;
the linkage piece is hinged with the rotating piece and forms a second hinge position at the hinge position of the linkage piece and the rotating piece;
the first driving piece is arranged on the base body piece, the power end of the first driving piece is hinged with the linkage piece and forms a third hinging position at the hinging position of the first driving piece and the linkage piece, the first driving piece can drive the third hinging position to move, the third hinging position is provided with a first state position and a second state position in the moving process, the first state position is closer to the base body piece than the second state position, and a preset stroke d is arranged between the first state position and the second state position;
the projection connecting line of the first hinge position and the second hinge position in the reference plane is a first straight line, the projection connecting line of the second hinge position and the third hinge position in the reference plane is a second straight line with a preset distance L, the projection of the movement track of the third hinge position in the reference plane is a third straight line, and the reference plane is a plane parallel to the movement track of the third hinge position;
when the third hinging position moves to the first state position, the rotating piece drives the shielding cover to move to a position for closing the ray opening, and an included angle beta formed between the second straight line and the third straight line meets cos beta >0;
when the third hinging position moves to the second state position, the rotating piece drives the shielding cover to move to a position for opening the ray opening, an included angle alpha formed between the second straight line and the third straight line meets cos alpha d/2L, and an included angle gamma formed between the first straight line and the second straight line meets gamma < pi.
In one embodiment, the shielding container and the first driving piece are arranged on the same side of the base piece in the first direction, the shielding container and the first driving piece are arranged at intervals side by side along the second direction perpendicular to the first direction, and a ray port is formed in one side of the shielding container, facing away from the base piece, in the first direction;
the motion trail of the third hinge position is a straight line extending along the first direction, and the reference surface is a plane parallel to the first direction and the second direction; wherein the first hinge position is between the first driver and the shielding container in the second direction and/or the second hinge position is between the third hinge position and the first hinge position in the first direction.
In one embodiment, the rotating member comprises two rotating arms arranged at intervals side by side or at intervals offset in a third direction, the rotating arms having a first connection position, a second connection position and a third connection position; wherein:
the first connecting positions of the two rotating arms are respectively hinged to the base body piece to form two base body hinging positions, and the two base body hinging positions comprise the first hinging positions; the linkage piece is hinged with a third connecting position of at least one rotating arm so as to form a second hinging position corresponding to the first hinging position; the second connection positions of the two rotating arms are respectively connected with the shielding cover, and the first direction, the second direction and the third direction are mutually perpendicular.
In one embodiment, the linkage comprises a linkage arm and a pivot shaft, and the two rotating arms are arranged side by side at intervals in the third direction; wherein:
the pivot shaft extends along the third direction and is hinged to third connecting positions of the two rotating arms, the linkage arm is provided with a fourth connecting position and a fifth connecting position, and the fourth connecting position of the linkage arm is hinged to the pivot shaft; the fifth connection location of the linkage arm is hinged to the power end of the first driving piece to form the third hinge location.
In one embodiment, the rotary member includes a plurality of rotary arms arranged side by side at intervals in the second direction, the rotary arms having a first connection position, a second connection position, and a third connection position; wherein:
a plurality of first connection positions of the rotating arms are respectively hinged to the base member to form a plurality of base hinge positions, and the plurality of base hinge positions comprise the first hinge positions; the linkage piece is hinged with a third connecting position of at least one rotating arm so as to form a second hinging position corresponding to the first hinging position; the second connection positions of the plurality of rotating arms are respectively hinged to the shielding cover to form a plurality of shielding hinge positions.
In one embodiment, in the second direction, the distance between two adjacent base hinge positions is equal to the distance between two adjacent shield hinge positions;
and/or
The linkage includes a linkage arm and an engagement arm; the joint arm extends along the second direction and is hinged with a plurality of third connecting positions of the rotating arms; the linkage arm is provided with a fourth connecting position and a fifth connecting position, and the fourth connecting position of the linkage arm is hinged with the joint arm; the fifth connection location of the linkage arm is hinged to the power end of the first driving piece to form the third hinge location.
In one embodiment, the rotating member comprises two radial arm groups arranged at intervals side by side or at intervals offset in a third direction, the radial arm groups comprise a plurality of rotating arms arranged at intervals side by side in the second direction, and the rotating arms have a first connection position, a second connection position and a third connection position; wherein:
in the two radial arm groups, the first connecting positions of the rotating arms are respectively hinged with the base body piece to form a plurality of base body hinging positions, and the first hinging positions are included in the plurality of base body hinging positions; the linkage piece is hinged with a third connecting position of at least one rotating arm so as to form a second hinging position corresponding to the first hinging position; in the two radial arm groups, the second connection positions of the rotating arms are respectively hinged with the shielding cover to form a plurality of shielding hinge positions; the first direction, the second direction and the third direction are perpendicular to each other.
In one embodiment, in the second direction, the distance between two adjacent base hinge positions is equal to the distance between two adjacent shield hinge positions;
and/or
The linkage piece comprises a linkage arm, a pivot shaft and two joint arms, wherein the two radial arm groups are arranged at intervals side by side in the third direction, and the joint arms are in one-to-one correspondence with the radial arm groups; wherein the engagement arms extend along the second direction and are hinged with third connection positions of a plurality of rotating arms in the corresponding rotating arm groups; the pivot shaft extends along the third direction and is hinged to the two joint arms; the linkage arm is provided with a fourth connecting position and a fifth connecting position, and the fourth connecting position of the linkage arm is hinged to the pivot shaft; the fifth connection location of the linkage arm is hinged to the power end of the first driving piece to form the third hinge location.
In one embodiment, the device further comprises a second driving member, wherein the second driving member is arranged on the base member; the power end of the second driving piece is coupled to the shielding container, and the second driving piece can drive the shielding container to linearly reciprocate in the first direction.
In one embodiment, the preset travel d is set to be smaller than the preset distance L.
According to the radiation shielding device of the radioactive source, the radiation shielding device comprises a base body, a first driving piece, a linkage piece and a rotating piece for connecting a shielding cover, wherein the base body is hinged with the rotating piece to form a first hinge position, the linkage piece is respectively hinged with the power ends of the rotating piece and the first driving piece and forms corresponding second and third hinge positions, and the first driving piece drives the third hinge position to move between a first state position and a second state position with a preset stroke d; in the reference plane, the projection connecting line of the first hinge position and the second hinge position is a first straight line, the projection connecting line of the second hinge position and the third hinge position is a second straight line with a preset distance L, and the projection of the movement track of the third hinge position is a third straight line; when the third hinging position moves to the first state position, the included angle beta between the second straight line and the third straight line meets cos beta >0; when the third hinge position moves to the second state position, an included angle alpha formed by the second straight line and the third straight line meets cos alpha > d/2L, and an included angle gamma between the first straight line and the second straight line meets gamma < pi.
By means of the cooperation of the functional pieces, a fan-shaped longitudinal space can be provided for the movement of the shielding cover, so that the fan-shaped longitudinal space is partially overlapped with the height space (such as the height space of the lifting movement of the shielding box) of the shielding box, occupation of the transverse space in the movement process of the shielding cover can be reduced, space height is not required to be reserved for the arrangement or the lifting movement of the shielding box independently, and occupation of the whole device to a limited space in application is effectively reduced.
Drawings
Fig. 1 is a schematic structural equivalent diagram of a shielding device according to an embodiment in a reference plane.
Fig. 2 is a schematic perspective view of a shielding device according to an embodiment in a shielding state.
Fig. 3 is a schematic perspective view of the shielding device in fig. 2 in an open state.
Fig. 4 is a schematic plan view of the shielding device in fig. 2 in a first direction when the shielding device is in an opened state.
Fig. 5 is a schematic diagram (a) illustrating an operation principle of the shielding device in the third direction in fig. 2.
Fig. 6 is a schematic diagram (two) illustrating an operation principle of the shielding device in the third direction in fig. 2.
Fig. 7 is a schematic diagram (iii) of the action principle of the shielding device in the third direction in fig. 2.
Fig. 8 is a schematic plan view of a shielding device of an embodiment in a second direction.
Fig. 9 is a schematic plan view of a shielding device in a third direction according to an embodiment.
In the figure:
10. a base member; 20. a rotating member; 21. a rotating arm; 21a, a first connection location; 21b, a second connection site; 21c, a third connection site; 30. a linkage member; 31. a linkage arm; 31a, fourth connection bit; 31b, fifth connection bit; 32. a pivot shaft; 33. an engagement arm; 40. a first driving member; 50. a shielding container; 50a, ray port; 60. a shielding cover; 70. a second driving member;
a1, a first hinge position; a2, a second hinge position; a3, a third hinging position; l1, a first straight line; l2, a second straight line; l3, a third straight line; p1, a first path; p2, second path.
Detailed Description
The invention will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, some operations associated with the present application have not been shown or described in the specification to avoid obscuring the core portions of the present application, and may not be necessary for a person skilled in the art to describe in detail the relevant operations based on the description herein and the general knowledge of one skilled in the art.
Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated.
Referring to fig. 1 to 9, an embodiment provides a radiation shielding device (for short, shielding device) of a radioactive source, which can be applied to related equipment or systems for detecting and measuring battery pole pieces, film materials and the like, so as to realize omnibearing automatic shielding of the radioactive source; the shielding device comprises a base member 10, a rotating member 20, a linkage 30, a first driving member 40, a shielding container 50, a shielding cover 60, a second driving member 70 and other components which are present according to need.
In order to more clearly and in detail describe the organization and arrangement relationship among the constituent components in the shielding device, a first direction, a second direction and a third direction are defined herein, and the three directions can form a space rectangular coordinate system with the shielding device as a reference, and the shielding device is specifically described below mainly by taking an example that the shielding device is in an application space environment, wherein the first direction refers to an up-down direction, the second direction refers to a left-right direction, and the third direction refers to a front-back direction.
Referring to fig. 1 to 9, the base member 10 is mainly used as a structural mounting carrier for other constituent members in the shielding device, so that the device is integrally positioned and fixed in an application space (for example, in a measuring device of a battery pole piece) by means of the base member 10. The first driving piece 40 and the second driving piece 70 are fixedly disposed on the same side of the base member 10 in the first direction (for example, the upper surface of the base member 10), and the first driving piece 40 and the second driving piece 70 are arranged at left and right intervals in the second direction; in specific implementation, the first driving member 40 and the second driving member 70 may be linear power devices such as an air cylinder, a motor and a linear module according to actual requirements, and in this embodiment, the first driving member 40 and the second driving member 70 are both exemplified by air cylinders.
Wherein the shielding container 50 is disposed in the upper space of the base member 10 along the first direction, the power end (such as a cylinder push rod) of the second driving member 70 is coupled or fixed to the shielding container 50, and a radiation port 50a is disposed on one side of the shielding container 50 facing away from the second driving member 70 or the base member 10 along the first direction; when the radiation port 50a is in an open state, the radiation source placed in the shielding container 50 can emit radiation through the radiation port 50a; the second driving member 70 can drive the shielding container 50 and the radiation source to reciprocate linearly in the first direction or move up and down relative to the base member 10 (for convenience of distinguishing and description, the movement track of the shielding container 50 is defined as a first path P1, please refer to fig. 3 and fig. 5 to fig. 7 specifically), so that the radiation source can approach and depart from the object to be measured, and when the radiation source approaches the object to be measured and the radiation port 50a is in an open state, the distance between the radiation source and the object to be measured can be shortened, thereby being beneficial to reducing radiation attenuation and improving the radiation utilization rate.
Referring to fig. 1 to 9, a shielding cover 60 is disposed in the rotating member 20 and is specifically located in the upper space of the shielding container 50 in the first direction, and is mainly used for opening and closing the radiation port 50a. The rotating member 20 is hinged to the base member 10, and a portion where the rotating member 20 and the base member 10 are hinged to each other is located on a side of the second driving member 70 (or the shielding container 50) toward the first driving member 40 in the second direction, for example, the hinge portion is located in a region between the first driving member 40 and the second driving member 70 in the second direction. The linkage member 30 is hinged to the power ends (such as cylinder push rods) of the rotating member 20 and the first driving member 40, respectively, so as to serve as a linkage member between the first driving member 40 and the rotating member 20.
By utilizing the hinging relationship among the base member 10, the rotating member 20, the linkage member 30 and the first driving member 40, the first driving member 40 drives the hinged part of the first driving member 40 and the linkage member 30 to reciprocate linearly in the first direction (for convenience of distinguishing and description, the motion track of the hinged part of the first driving member 40 and the linkage member 30 is defined as a second path P2, and the second path P2 and the first path P1 are distributed in parallel left and right in the second direction; referring specifically to fig. 3 and 5-7), so that the linkage member 30 drives the rotating member 20 to rotate by taking the hinged part of the rotating member 20 and the base member 10 as the rotation axis, and the shielding cover 60 can rotate relative to the base member 10 in the upper space of the shielding container 50 along with the rotating member 20; so that the shielding cover 60 faces and completely closes the radiation port 50a in the first direction when moving to the preset position in the first path P1, and the shielding cover 60 completely opens the radiation port 50a when moving to the preset position deviated from the first path P1.
For a clearer detailed description of the cooperation or arrangement of the functional components, please refer to fig. 1 in combination with fig. 2 to 9, where the rotary member 20 and the base member 10 are hinged to each other is defined as a first hinge position a1, where the linkage member 30 and the rotary member 20 are hinged to each other is defined as a second hinge position a2, and where the power end of the first driving member 40 and the linkage member 30 are hinged to each other is defined as a third hinge position a3; meanwhile, a virtual plane parallel to the first direction and the second direction and perpendicular to the third direction is defined as a reference plane, which may be understood as a virtual plane parallel to the movement trace of the third hinge position a3 or the second path P2.
The projection connecting line of the first hinge position a1 and the second hinge position a2 in the reference plane is a first straight line L1, and the projection of the movement track of the third hinge position a3 or the second path P2 in the reference plane is a third straight line L3; the distance between the projections of the second hinge position a2 and the third hinge position a3 in the reference plane is a preset distance L, and the projection connecting line of the second hinge position a2 and the third hinge position a3 is a second straight line L2.
In addition, when the shielding cover 60 completely covers the ray port 50a, the position of the third hinge position a3 on the movement track is defined as a first state position; when the shielding cover 60 fully opens the ray port 50, the position of the third hinge position a3 on the movement track is defined as a second state position; that is, the third hinge bit a3 has a first state bit and a second state bit during movement.
In one embodiment, referring to fig. 1 in conjunction with fig. 2 to 9, the first hinge position a1 is located between the first driving member 40 and the second driving member 70 in the second direction (it can be understood that the first hinge position a1 is located between the first path P1 and the second path P2 in the second direction), and the second hinge position a2 is located between the third hinge position a3 and the first hinge position a1 in the first direction; at the same time, in the first direction, the first state bit is closer to the base member 10 than the second state bit, and there is a preset travel d between the first state bit and the second state bit.
When the third hinge position a3 moves to the first state position, an angle β is formed between the second straight line L2 and the third straight line L3, and the angle β is set to satisfy cos β >0. When the third hinge position a3 moves to the second state position, an included angle alpha is formed between the second straight line L2 and the third straight line, and the included angle alpha is set to meet cos alpha > d/2L; and an angle γ is formed between the first straight line L1 and the second straight line L2, and the angle γ is set to satisfy γ < pi.
Based on this, by utilizing the hinge connection relationship between the related functional components and the optimized configuration of the distance relationship and the angle relationship between the hinge positions, under the driving action of the first driving member 40, the shielding cover 60 can move relative to the base member 10 or the shielding container 50 along a fan-shaped longitudinal space or a fan-shaped track (see the bold dashed line in fig. 5 to 7 in detail), and because the fan-shaped longitudinal space and the height space of the lifting movement of the shielding container 50 are partially overlapped, the occupation of the transverse space by the shielding cover 60 in the moving process can be reduced, and the occupation of the whole device to the limited space is effectively reduced without separately reserving the longitudinal space for the lifting movement of the shielding container 50, thereby creating an advantage for more flexible application of the shielding device.
It should be noted that, the bold dashed line in fig. 1 represents the relative positional relationship between the projections of the third hinge position a3 and the corresponding projection connecting line when the third hinge position a3 is in the first state position; the bold solid line in fig. 1 represents the relative positional relationship between the projections of the respective hinge positions and the corresponding projection lines when the third hinge position is in the second state position.
In some embodiments, the second driving member 70 may be omitted, and the shielding container 50 may be directly and fixedly disposed on the base member 10 along the first path P1, and the ray port 50a may be located at a position where the movement track of the shielding cover 60 intersects with the first path P1; therefore, although the distance between the radioactive source and the measured object cannot be adjusted, the shielding cover 60 moves in a fan-shaped longitudinal space or along a fan-shaped track, so that the occupied space of the whole device can be reduced, and different application requirements can be met.
In other embodiments, the shielding container 50, the shielding cover 60 and the second driving member 70 may also be functional components used in conjunction with the shielding device, namely: any one or more of the shielding container 50, the shielding cap 60, and the second driver 70 are not an integral part of the shielding device; for example, in the case of a structural modification of an existing shielding device, the shielding cover 60 may be modified to the rotary member 20, and the second driving member 70 and the shielding container 50 may be integrally provided on one side of the first driving member 40 in a corresponding structural relationship.
In one embodiment, referring to fig. 8 in combination with fig. 1 to 7, the rotating member 20 includes two rotating arms 21 with a substantially straight-bar shape overall outline, and the two rotating arms 21 are arranged side by side and side at intervals in a third direction; specifically, one of the two rotating arms 21 is disposed at the front side of the first driving member 40 in the third direction, and the other is disposed at the rear side of the first driving member 40 in the third direction, and each rotating arm 21 has a first connection position 21a, a third connection position 21c, and a second connection position 21b which are sequentially arranged at intervals along the length direction thereof; wherein, the first connection positions 21a of the two rotating arms 21 are respectively hinged to the base member 10 to form two base hinge positions opposite to each other in the third direction, and each base hinge position is a corresponding first hinge position a1; the second connection locations 21b of the two rotating arms 21 are each hinged to the shielding cover 60 to form two shielding hinge locations, for example, when the shielding cover 60 is disposed between the second connection locations 21b of the two rotating arms 21, two shielding hinge locations opposite to each other in the third direction may be formed.
Suitably, the linkage 30 comprises a linkage arm 31 and a pivot shaft 32, the pivot shaft 32 extending in a third direction and being hinged between the third connection locations 21c of the two pivot arms 21 to form second hinge locations a2 in one-to-one correspondence with the first hinge locations a1; the linkage arm 31 has fourth connection sites 31a and fifth connection sites 31b arranged at intervals along the length direction thereof; the fourth connection position 31a of the linkage arm 31 is hinged to the pivot shaft 32 (for example, a position of the pivot shaft 32 between the two rotating arms 21 in the third direction), and the fifth connection position 31b of the linkage arm 31 is hinged to the power end of the first driving member 40 to form a third hinge position a3.
On the one hand, under the driving action of the first driving element 40, the linkage arm 31 can drive the two rotating arms 21 to synchronously rotate by taking the two base body hinge positions or the connecting line between the two first hinge positions a1 as the rotation axis through the pivot shaft 32, so that the stress of the two rotating arms 21 is more balanced, and the shielding cover 60 is stably driven to move to the position for sealing or opening the ray opening 50a; on the other hand, the two rotating arms 21 are used as the connection carrier of the shielding cover 60, so that the shielding cover 60 can be stably installed and moved smoothly.
In particular, in the third direction, the distance between two base hinge positions opposite to each other may be set equal to the distance between two shield hinge positions opposite to each other. In addition, the shielding cover 60 may be fixedly connected between the second connection locations 21b of the two rotating arms 21.
The first connection position 21a and the second connection position 21b may be two end portions of the rotary arm 21 that are spaced apart from each other in the longitudinal direction, or may be other portions than the end portions; the fourth connecting position 31a and the fifth connecting position 31b may be two end portions of the link arm 31 which are spaced apart from each other in the longitudinal direction thereof, or may be other portions than the end portions. In addition, according to practical needs, the rotating arm 21 may also adopt other suitable structures, which will not be described herein.
In another embodiment, as for the linkage 30, the pivot shaft 32 may be omitted, and the fourth connection position 31a of the linkage arm 31 is hinged with the third connection position 21c of any one of the rotating arms 21 to form the second hinge position a2; therefore, the whole structure of the device can be simplified, and the shielding cover 60 can be stably installed and driven to move stably. It will be appreciated that one of the two base hinge positions at this time, which corresponds to the link arm 31, is the first hinge position a1. Of course, the two rotating arms 21 may be arranged at staggered intervals in the third direction, and the link 30 may be hinged to the third connection position 21c of one of the rotating arms 21.
In one embodiment, referring to fig. 9 in combination with fig. 1 to 7, the rotating member 20 includes two rotating arms 21 arranged side by side at intervals in the second direction; the linkage 30 then comprises a linkage arm 31 and an engagement arm 33; in terms of the structural forms of the rotating arm 21 and the linkage arm 31, reference may be made specifically to the foregoing embodiments, and details thereof will not be described herein.
In terms of the rotating member 20, the first connection locations 21a of the two rotating arms 21 are hinged to the base member 10 respectively, so as to form two base hinge locations distributed at left and right intervals in the second direction, and each base hinge location is a corresponding first hinge location a1; the second connection positions 21b of the two rotating arms 21 are respectively hinged to the shielding cover 10 to form two shielding hinge positions which are distributed at left and right intervals in the second direction; in particular, the distance between the two shield hinge positions is equal to the distance between the two base hinge positions, and the distance between the first connection position 21a and the second connection position 21b of one of the two rotating arms 21 is equal to the distance between the first connection position 21a and the second connection position 21b of the other.
The base member 10, the shielding cover 60 and the two rotating arms 21 together form a parallel four-bar mechanism, so that the shielding cover 60 can rotate along with the rotating member 20 and can keep the angle of the shielding cover in the second direction unchanged, thereby being better matched with the ray port 50a.
As for the link 30, the engagement arms 33 are arranged to extend in the second direction and are hinged with the third connection sites 21c of the two rotation arms 21, respectively, to form second hinge sites a2 in one-to-one correspondence with the first hinge sites a1; the fourth connection position 31a of the linkage arm 31 is hinged to the engagement arm 33 (e.g., the engagement arm 33 is located at a central position between the two rotating arms 21), and the fifth connection position 31b of the linkage arm 31 is hinged to the power end of the first driving member 40 to form a third hinge position a3.
The articulated connection relationship is established between the two rotating arms 21 and the linkage arm 31 by the joint arm 33, so that the stress of the two rotating arms 21 can be more balanced; the link arm 31 causes the two rotating arms 21 to rotate synchronously under the driving action of the first driving member 40, and can ensure that the shield cover 60 rotates smoothly and smoothly with respect to the base member 10 or the shield container 50.
In another embodiment, the number of the rotating arms 21 may be three, four or more, and the plurality of rotating arms 21 are arranged side by side at intervals in the second direction to form a plurality of parallel four-bar mechanisms with the base member 10 and the shielding 60, so that the stability of the installation and movement of the shielding cover 60 can be enhanced, and different application requirements can be satisfied.
In other embodiments, the engaging arm 33 may be omitted, and the fourth connecting position 31a of the connecting arm 31 is hinged to the third connecting position 21c of one of the rotating arms 21, so that the shielding cover 60 can be smoothly moved while simplifying the overall structure of the device. It will be appreciated that one of the two base hinge positions corresponding to the linkage arm 31 is the first hinge position a1.
In one embodiment, referring to fig. 2 to 7 in combination with fig. 1, 8 and 9, the rotating member 20 includes two radial arm groups arranged side by side at intervals in the third direction, each radial arm group including two rotating arms 21 arranged side by side at intervals in the second direction; the linkage 30 then comprises a linkage arm 31, a pivot shaft 32 and two engagement arms 33; the structures and arrangements of the rotating arm 21, the linkage arm 31 and the engagement arm 33 may be specifically referred to the foregoing embodiments, and will not be described herein.
For the rotary member 20, the first connection locations 21a of the four rotary arms 21 are respectively hinged to the base member 10 to form four base hinge locations, and the four base hinge locations are distributed in a second direction at intervals and are distributed in a pair-wise opposite manner in a third direction; the second connection locations 21b of the four rotating arms 21 are respectively hinged to the shielding cover 60 to form four shielding hinge locations in the same spatial arrangement manner as the four base hinge locations; in particular, in the second direction, the distance between two base hinge positions adjacent to each other is set equal to the distance between two shield hinge positions adjacent to each other, and the distance between the first connection position 21a and the second connection position 21b of each rotating arm 21 is set equal.
Under the cooperation of the base member 10 and the shielding cover 60, two sets of parallel four-bar mechanisms which are distributed at intervals in the third direction can be formed in a combined manner, and because the shielding cover 60 is arranged between the two sets of parallel four-bar mechanisms, the angle of the shielding cover 60 in the second direction can be kept unchanged during the movement process, and the shielding cover 60 can be more stably supported when moving to a position where the ray opening 50a is completely opened (for example, moving to a vertical position intersected with the second path P2); in addition, it is also possible to ensure more stable installation and smoother movement of the shield cover 60.
With respect to the link 30, two engagement arms 33 are provided in one-to-one correspondence with two radial arm groups, that is: the third connection positions 21c of the two rotating arms 21 in each radial arm group are respectively hinged to the corresponding joint arms 33 of the radial arm group; the pivot shaft 32 extends along a third direction and is hinged between the two engagement arms 33, while the fourth connection location 31a of the linkage arm 31 is hinged to the pivot shaft 32 and the fifth connection location 31b is hinged to the power end of the first driving member 40; in this way, by means of the cooperation of the pivot 32 and the two engagement arms 33, the forces of the two sets of parallel four-bar mechanisms are more balanced, thereby creating advantages for a smooth movement of the shielding cover 60.
In another embodiment, the engagement arm 33 may be omitted, and the pivot shaft 32 is disposed between the two swing arm groups in the third direction and is hinged to the third connection locations 21c of the two swing arms 21 spaced opposite to each other in the third direction, respectively; in this way, the first driving member 40 can drive the two sets of parallel four-bar mechanisms to rotate the shielding cover 60 smoothly relative to the base member 10 or the shielding container 50.
In other embodiments, the two radial arm groups may be arranged with a staggered interval in the third direction; suitably, the linkage 30 may omit the pivot shaft 32, while the fourth connection position 31a of the linkage arm 31 is hinged with the engagement arm 33 corresponding to one of the radial arm groups; or the pivot shaft 32 and the linkage arm 31 are omitted at the same time, and the fourth connection position 31 of the linkage arm 31 is hinged with the third connection position 21c of one of the rotating arms 21. Of course, the number of the rotating arms 21 may be three, four or more according to the actual requirement for each arm group.
The invention has been described with particular reference to examples, which are intended to be merely illustrative of the invention and not limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the invention pertains, based on the idea of the invention.
Claims (10)
1. A radioactive source radiation shielding device, comprising:
a base member;
a rotating member for connecting the shield cover, the rotating member being hinged to the base member and forming a first hinge position at a hinge position with each other;
the linkage piece is hinged with the rotating piece and forms a second hinge position at the hinge position of the linkage piece and the rotating piece;
the first driving piece is arranged on the base body piece, the power end of the first driving piece is hinged with the linkage piece and forms a third hinging position at the hinging position of the first driving piece and the linkage piece, the first driving piece can drive the third hinging position to move, the third hinging position is provided with a first state position and a second state position in the moving process, the first state position is closer to the base body piece than the second state position, and a preset stroke d is arranged between the first state position and the second state position;
the projection connecting line of the first hinge position and the second hinge position in the reference plane is a first straight line, the projection connecting line of the second hinge position and the third hinge position in the reference plane is a second straight line with a preset distance L, the projection of the movement track of the third hinge position in the reference plane is a third straight line, and the reference plane is a plane parallel to the movement track of the third hinge position;
when the third hinging position moves to the first state position, the rotating piece drives the shielding cover to move to a position for closing the ray opening, and an included angle beta formed between the second straight line and the third straight line meets cos beta >0;
when the third hinging position moves to the second state position, the rotating piece drives the shielding cover to move to a position for opening the ray opening, an included angle alpha formed between the second straight line and the third straight line meets cos alpha d/(2L), and an included angle gamma formed between the first straight line and the second straight line meets gamma < pi.
2. The radiation-shielding device for a radioactive source of claim 1, further comprising a shielding container and a shielding cover, said shielding container and said first driver being disposed on the same side of said base member in a first direction and said shielding container and said first driver being spaced side by side along a second direction perpendicular to said first direction, said shielding container being provided with a radiation opening on a side of said first direction facing away from said base member;
the motion trail of the third hinge position is a straight line extending along the first direction, and the reference surface is a plane parallel to the first direction and the second direction; wherein the first hinge position is between the first driver and the shielding container in the second direction and/or the second hinge position is between the third hinge position and the first hinge position in the first direction.
3. The radiation-shielding device of claim 2, wherein the rotating member comprises two rotating arms arranged side-by-side or offset at intervals in a third direction, the rotating arms having a first connection location, a second connection location, and a third connection location; wherein:
the first connecting positions of the two rotating arms are respectively hinged to the base body piece to form two base body hinging positions, and the two base body hinging positions comprise the first hinging positions; the linkage piece is hinged with a third connecting position of at least one rotating arm so as to form a second hinging position corresponding to the first hinging position; the second connection positions of the two rotating arms are respectively connected with the shielding cover, and the first direction, the second direction and the third direction are mutually perpendicular.
4. A radioactive source radiation shielding device as in claim 3 wherein said linkage includes a linkage arm and a pivot shaft, two of said pivot arms being spaced side by side in said third direction; wherein:
the pivot shaft extends along the third direction and is hinged to third connecting positions of the two rotating arms, the linkage arm is provided with a fourth connecting position and a fifth connecting position, and the fourth connecting position of the linkage arm is hinged to the pivot shaft; the fifth connection location of the linkage arm is hinged to the power end of the first driving piece to form the third hinge location.
5. The radioactive source radiation shielding device of claim 2, wherein the rotating member includes a plurality of rotating arms arranged side-by-side in the second direction at intervals, the rotating arms having a first connection location, a second connection location, and a third connection location; wherein:
a plurality of first connection positions of the rotating arms are respectively hinged to the base member to form a plurality of base hinge positions, and the plurality of base hinge positions comprise the first hinge positions; the linkage piece is hinged with a third connecting position of at least one rotating arm so as to form a second hinging position corresponding to the first hinging position; the second connection positions of the plurality of rotating arms are respectively hinged to the shielding cover to form a plurality of shielding hinge positions.
6. A radioactive source radiation shielding device as in claim 5 wherein the distance between adjacent two of said base hinge positions in said second direction is equal to the distance between adjacent two of said shielding hinge positions;
and/or
The linkage includes a linkage arm and an engagement arm; the joint arm extends along the second direction and is hinged with a plurality of third connecting positions of the rotating arms; the linkage arm is provided with a fourth connecting position and a fifth connecting position, and the fourth connecting position of the linkage arm is hinged with the joint arm; the fifth connection location of the linkage arm is hinged to the power end of the first driving piece to form the third hinge location.
7. The radiation-shielding device of claim 2, wherein the rotating member comprises two radial arm sets arranged side-by-side or offset in a spaced apart relationship in a third direction, the radial arm sets comprising a plurality of rotating arms arranged side-by-side in a spaced apart relationship in the second direction, the rotating arms having a first connection location, a second connection location, and a third connection location; wherein:
in the two radial arm groups, the first connecting positions of the rotating arms are respectively hinged with the base body piece to form a plurality of base body hinging positions, and the first hinging positions are included in the plurality of base body hinging positions; the linkage piece is hinged with a third connecting position of at least one rotating arm so as to form a second hinging position corresponding to the first hinging position; in the two radial arm groups, the second connection positions of the rotating arms are respectively hinged with the shielding cover to form a plurality of shielding hinge positions; the first direction, the second direction and the third direction are perpendicular to each other.
8. A radioactive source radiation shielding device as in claim 7 wherein the distance between adjacent two of said base hinge positions in said second direction is equal to the distance between adjacent two of said shielding hinge positions;
and/or
The linkage piece comprises a linkage arm, a pivot shaft and two joint arms, wherein the two radial arm groups are arranged at intervals side by side in the third direction, and the joint arms are in one-to-one correspondence with the radial arm groups; wherein the engagement arms extend along the second direction and are hinged with third connection positions of a plurality of rotating arms in the corresponding rotating arm groups; the pivot shaft extends along the third direction and is hinged to the two joint arms; the linkage arm is provided with a fourth connecting position and a fifth connecting position, and the fourth connecting position of the linkage arm is hinged to the pivot shaft; the fifth connection location of the linkage arm is hinged to the power end of the first driving piece to form the third hinge location.
9. The radiation-shielding apparatus of claim 2, further comprising a second driver disposed on the base member; the power end of the second driving piece is coupled to the shielding container, and the second driving piece can drive the shielding container to linearly reciprocate in the first direction.
10. The radiation-shielding device defined in any one of claims 1-9, wherein the predetermined travel d is set to be less than the predetermined distance L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310299458.0A CN116403751B (en) | 2023-03-24 | 2023-03-24 | Radiation shielding device of radioactive source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310299458.0A CN116403751B (en) | 2023-03-24 | 2023-03-24 | Radiation shielding device of radioactive source |
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| CN116403751B true CN116403751B (en) | 2024-01-16 |
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| CN202310299458.0A Active CN116403751B (en) | 2023-03-24 | 2023-03-24 | Radiation shielding device of radioactive source |
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| CN116403751A (en) | 2023-07-07 |
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