CN109188490B - Rotary semi-closed nuclear detection throwing device - Google Patents
Rotary semi-closed nuclear detection throwing device Download PDFInfo
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- CN109188490B CN109188490B CN201811105816.5A CN201811105816A CN109188490B CN 109188490 B CN109188490 B CN 109188490B CN 201811105816 A CN201811105816 A CN 201811105816A CN 109188490 B CN109188490 B CN 109188490B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/167—Measuring radioactive content of objects, e.g. contamination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
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Abstract
The invention discloses a rotary semi-closed nuclear detection throwing device, which comprises a storage assembly, a throwing device and a throwing device, wherein the storage assembly is hollow, the bottom of the storage assembly is not closed, and a road sign is stored in the storage assembly; the pushing assembly comprises a power part and a baffle, and the baffle is arranged below the storage assembly and used for blocking the road sign from falling off; the power part is arranged below the road signs in an inclined manner, drives the baffle to rotate and controls the number of the road signs in the storage assembly; the width of the storage component is not less than the diameter of the road signs and not more than twice the diameter of the road signs, and the road signs are stored in the storage component in a row. According to the invention, monitoring personnel in the nuclear pollution monitoring vehicle use the automatic road sign throwing device to mark whether nuclear radiation pollution exists in the surrounding area, so that the direct exposure of the working personnel to the nuclear accident occurrence area is effectively prevented, the direct contact with a radiation source at a short distance and the contamination of radioactive substances are avoided, and the personal safety of rescue personnel entering the nuclear pollution area is ensured to the maximum extent.
Description
Technical Field
The invention relates to the technical field of nuclear pollution detection, in particular to a tumbler throwing device based on a motor nuclear biochemical detection road sign.
Background
With the wide application of nuclear energy and the rapid development of domestic nuclear power industry, the risk of nuclear leakage and nuclear pollution in the society is increasing day by day, and a large amount of manpower and material resources are needed for the detection and the processing of nuclear radiation pollution events. The detection personnel have to face the damage caused by nuclear radiation when working in the nuclear pollution area, and great harm is done to the life safety of the detection personnel. Therefore, it is necessary to develop a road sign launching device for screening whether the area where the vehicle runs has the nuclear radiation danger or not in the suspected nuclear pollution area and preventing workers entering the nuclear pollution area from being infected with radiation.
The automatic releasing device for the tumbler road signs for detecting whether nuclear pollution exists in the detection area is designed, and the releasing of the road signs is controlled by a controller on an in-cabin workbench. In the running process of the nuclear pollution detection vehicle, personnel make judgment through the extravehicular environment detection equipment, if the environment is good, the controller control button is pressed, and the green road sign is put in from the cabinet body. Similarly, if the environment is poor, the red road sign is thrown from the cabinet. The quantity of each color is 10, the green road signs are arranged in the left cabinet body, the red road signs are arranged in the right cabinet body and are distributed on two sides of the rear door of the vehicle, the road signs are in a tumbler shape and have the function of a tumbler, and the vehicle can stand by oneself after being thrown to the ground.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above and/or other problems occurring in the prior art.
Therefore, one of the objects of the present invention is to provide a delivery device for nuclear detection.
In order to solve the technical problems, the invention provides the following technical scheme: a rotary semi-closed nuclear detection throwing device comprises a storage assembly, a throwing device and a control device, wherein the storage assembly is hollow, the bottom of the storage assembly is not closed, and a road sign is stored in the storage assembly; the pushing assembly comprises a power part and a baffle, and the baffle is arranged below the storage assembly and used for blocking the road sign from falling off; the power part is arranged below the road signs in an inclined manner, drives the baffle to rotate and controls the number of the road signs in the storage assembly; the width of the storage component is not less than the diameter of the road signs and not more than twice the diameter of the road signs, and the road signs are stored in the storage component in a row.
As a preferable scheme of the rotary semi-closed nuclear detection throwing device of the present invention, wherein: the pushing assembly further comprises a gearbox, and one end of the gearbox is connected with the baffle and is also connected with the power part; the power part drives the gear box to rotate, the gear box is connected with the baffle, and the baffle rotates along with the gear box.
As a preferable scheme of the rotary semi-closed nuclear detection and delivery device of the present invention, wherein: the baffle is an arc-shaped sheet, and the radius of the baffle is larger than that of the road sign.
As a preferable scheme of the rotary semi-closed nuclear detection and delivery device of the present invention, wherein: the angle of the arc-shaped sheet of the baffle is 180-270 degrees.
As a preferable scheme of the rotary semi-closed nuclear detection throwing device of the present invention, wherein: the power part drives the arc-shaped sheet to rotate by an angle of 90-180 degrees.
As a preferable scheme of the rotary semi-closed nuclear detection throwing device of the present invention, wherein: the storage component further comprises a base, a supporting plate is further arranged on the base, the power part is connected with the supporting plate, and the position of the power part is supported and fixed.
As a preferable scheme of the rotary semi-closed nuclear detection throwing device of the present invention, wherein: the storage assembly comprises a guide rail, a pressing plate, a linear bearing and a box body, the guide rail is connected with the upper end and the lower end of the box body, the pressing plate is connected with the linear bearing, and the linear bearing is sleeved on the guide rail.
As a preferable scheme of the rotary semi-closed nuclear detection throwing device of the present invention, wherein: the pressing plate is L-shaped, one surface of the pressing plate is connected with the linear bearing, and the other surface of the pressing plate blocks the road sign.
As a preferable scheme of the rotary semi-closed nuclear detection throwing device of the present invention, wherein: the storage assembly further comprises a door hinge, a door plate and a door lock; one end of the door plate is connected with the box body through the door hinge, and the other end of the door plate is fixed with the box body through the door lock.
The invention has the beneficial effects that: according to the invention, monitoring personnel in the nuclear pollution monitoring vehicle can mark whether nuclear radiation pollution exists in the surrounding area or not by using the automatic road sign throwing device, so that the direct exposure of the personnel to the nuclear accident occurrence area is effectively prevented, and the direct contact of a radiation source at a short distance and the contamination of radioactive substances are avoided. The road signs continuously thrown out by the monitoring vehicle can quickly and efficiently explore the route convenient for the rescuers to travel in the nuclear accident occurrence area, and the personal safety of the rescuers entering the nuclear pollution area is guaranteed to the maximum extent. At the same time, the loss caused by nuclear accidents is reduced and the situation is prevented from further worsening.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic overall structure diagram of a rotary semi-enclosed nuclear detection and delivery device in a vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic view of the overall structure of a perspective of a rotary semi-enclosed nuclear detection delivery apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another view angle of the rotary semi-enclosed nuclear detection delivery device according to an embodiment of the present invention;
fig. 4 is a schematic view of the overall structure of the storage assembly of the rotary semi-enclosed nuclear detection and delivery device in an embodiment of the present invention;
fig. 5 is a schematic view of the overall structure of the storage assembly of the rotary semi-enclosed nuclear detection and delivery device at another angle according to an embodiment of the present invention;
fig. 6 is a partial structural diagram of the storage assembly of the rotary semi-enclosed nuclear detection and delivery device at an angle in one embodiment of the invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
With the wide application of nuclear energy and the rapid development of domestic nuclear power industry, the risk of nuclear leakage and nuclear pollution in the society is increasing day by day, and a large amount of manpower and material resources are needed for the detection and the processing of nuclear radiation pollution events. The detection personnel have to face the damage caused by nuclear radiation when working in the nuclear pollution area, and great harm is done to the life safety of the detection personnel. Therefore, it is necessary to develop a road sign launching device for screening whether the area where the vehicle runs has the nuclear radiation danger or not in the suspected nuclear pollution area and preventing workers entering the nuclear pollution area from being infected with radiation.
Therefore, referring to fig. 1, the present invention provides an automatic putting device of a tumbler road sign for detecting whether a nuclear pollution exists in an area, and a controller on an on-board working platform is used for controlling the putting of the road sign. In the running process of the nuclear pollution detection vehicle, personnel make judgment through the extravehicular environment detection equipment, if the environment is good, the controller control button is pressed, and the green road sign is put in from the cabinet body. Similarly, if the environment is poor, the red road sign is thrown from the cabinet. The quantity of each color is 10, the green road signs are arranged in the left cabinet body, the red road signs are arranged in the right cabinet body and are distributed on two sides of the rear door of the vehicle, the road signs are in a tumbler shape and have the function of a tumbler, and the vehicle can stand by oneself after being thrown to the ground.
Referring to fig. 1 to 2, a first embodiment of the rotary semi-enclosed nuclear detection and delivery device according to the present invention is provided, the main body of the first embodiment includes a storage module 100 and a pushing and placing module 200, a road sign is placed inside the storage module 100, and the road sign is placed from the storage module 100 and placed on the ground through the pushing and placing module 200.
The road sign has a guiding and marking function, the structural principle of the road sign is equivalent to that of a tumbler, and the road sign also has the function of the tumbler and can stand by itself after being thrown to the ground. In this embodiment, the road sign marks have two colors, and the number of each color is 10.
The storage module 100 is hollow inside and not closed at the bottom, and stores therein road signs. The storage assembly 100 is a storage accommodating body, so long as the storage accommodating body can meet the space size capable of being placed, the size can be adjusted according to actual conditions, all automatic equipment can normally operate in the storage assembly 100 and have enough working space, the throwing process is not influenced, meanwhile, the phenomenon of interference cannot occur with other equipment outside, the vibration environment of a vehicle during running can be met, and the road sign can be stably fixed on the equipment in a non-throwing state during running. In this embodiment, since the road signs are divided into two colors of green and red, road signs of different colors are applied according to the detection conditions, and since the apparatuses for placing the road signs are the same, taking green as an example, a specific description will be made as to the apparatuses for placing the red road signs, which are similar to the apparatuses for placing the red road signs, and the two apparatuses are coated with T-iverkov FC101-3 finish, and are distributed on both sides of the rear door of the traveling vehicle. The green road signs are placed in a storage assembly 100 of a dispensing device for detection.
In order to ensure that the green road signs are regularly arranged and spread in the storage assembly 100 without mutual interference, the storage assembly 100 in this embodiment is a rectangular parallelepiped, but not limited to this shape, and what the storage assembly 100 needs to satisfy is: the width of the storage module is not less than the diameter of the green road signs and not more than the diameters of the two parts of the green road signs, so that the road signs can be stored in the storage module 100 in one row only and cannot be stored in multiple rows. The length of the storage component 100 is not less than the length of the bus of the green road sign, and less than twice the length of the bus of the green road sign, and the storage component 100 is limited to ensure that the space position where the green road sign is placed can only be one row and one row.
The pushing assembly 200 comprises a power member 201 and a baffle 202, and the baffle 202 is arranged below the storage assembly 100 and used for stopping the road sign from falling off. That is, in the initial state, the barrier 202 is placed under the road sign, preventing the green road sign from falling.
The power member 201 is disposed at the oblique lower side of the green road sign to drive the baffle 202 to rotate, thereby controlling the number of the road signs in the storage assembly 100. The oblique lower direction referred to herein is intended to mean that the power member 201 is disposed under the green road sign and not directly under the green road sign because if the power member 201 is disposed directly under the green road sign, it blocks the falling of the road sign, and thus is disposed obliquely below the green road sign.
Preferably, the power member 201 is in the same plane as the lowest green road sign.
It should be noted that the power member 201 is preferably a motor, and since the motor is driven to rotate at a higher speed, the baffle 202 is controlled to be very small, so that when green road signs are thrown, a plurality of green road signs are thrown at one place, which results in wasting resources gathered by road signs, in this embodiment, the putting assembly 200 further includes a gearbox 203, and one end of the gearbox 203 is connected to the baffle 202 and is connected to the power member 201 at the same time. When the power member 201 drives the gear box 203 to rotate, the gear box 203 is connected with the baffle 202, and then the baffle 202 rotates together with the power member 201.
The gearbox 203 can change the transmission ratio and expand the effect of the driving wheel torque and speed. With the development of modern science and technology, the gearbox is also upgraded, and the control is more and more convenient from the original manual gearbox to the current stepless gearbox from the synchronizer-free gearbox to the synchronizer-containing gearbox. At present, the engineering machinery widely adopts a diesel engine, the torque and rotating speed change range of the diesel engine is small, the requirements of a vehicle on traction force and running speed under various working conditions cannot be met, and a gearbox is required to solve the contradiction. The quality of the performance of the gearbox is the key for measuring the dynamic property, the economical efficiency and the drivability of the engineering machinery. The current speed change systems mainly comprise: mechanical transmission, hydraulic transmission, hydrostatic transmission. The gearbox has manual gear shifting and power gear shifting, and the structure has a fixed shaft type and a planetary type. The transmission ratio can be changed, the change range of the torque and the rotating speed of the driving wheel is expanded so as to adapt to the frequently changed running condition, and meanwhile, the engine can work under the favorable working condition (higher power and lower oil consumption).
Preferably, in the present embodiment, the gearbox 203 is a step-variable transmission, which uses gears with a plurality of fixed gear ratios, and according to the type of gear train used, there are two types, namely an axis-fixed transmission (ordinary transmission) and an axis-rotating transmission (planetary transmission), and in the present application, an axis-rotating transmission is used.
It should be noted that, a controller is provided in the detected vehicle, the controller is arranged on the working table in the vehicle, and is used for controlling the throwing of the road signs, so that during the driving process, personnel can make a judgment through the environment detection and differentiation outside the cabin, if the environment is good, a control button of the controller is pressed, the green road signs are thrown from the baffle 202, and similarly, if the environment is poor, the red road signs are thrown from the baffle 202 in another device.
Preferably, the controller is powered by 24V direct current.
In this embodiment, the baffle 202 is an arc-shaped sheet, the radius of the arc-shaped sheet is greater than the radius of the road sign, and the arc angle of the baffle 202 is 180 ° to 270 °. The advantages of this are: when the road sign falls, the baffle 202 rotates upwards to block the falling of the original penultimate road sign, and when the power member 201 indirectly drives the baffle 202 to rotate, the last road sign (i.e. the road sign in contact with the baffle 202) falls, and simultaneously, because the arc angle of the baffle 202 is 180-270 degrees, the baffle 202 rotates upwards to block the falling of the original penultimate road sign.
It should be noted that, since the flap 202 is for letting the road sign be dropped, the flap 202 rotates counterclockwise when rotating.
Thus, the baffle 202 serves two functions: firstly, when putting, the last road sign falls down. And secondly, the penultimate road sign is prevented from falling off.
Referring to fig. 1 to 5, a second embodiment of the rotary semi-enclosed nuclear detection and delivery device of the present invention is provided, which is different from the first embodiment: in this embodiment, the storage assembly 100 includes a guide rail 101, a pressing plate 102, a linear bearing 103, and a box 104, wherein the guide rail 101 connects the upper end and the lower end of the box 104, the pressing plate 102 connects with the linear bearing 103, and the linear bearing 103 is sleeved on the guide rail 101.
Wherein, the pressing plate 102 is in an L shape, one side of the pressing plate is connected with the linear bearing 103, and the other side blocks the road sign. Since the green road sign itself is in the shape of a tumbler, a weight member is pressed against it, and the pressing plate 102 plays this role in this embodiment. And when pressing down each green road sign, will guarantee that green road sign itself can not the perk, consequently set up guide rail 101 and linear bearing 103, played the guide effect to clamp plate 102 through guide rail 101 and linear bearing 103, prevent the condition of the random perk of clamp plate 102 in the pressure simultaneously.
Preferably, the storage assembly 100 further comprises a door hinge 107, a door panel 105 and a door lock 106, wherein the door panel 105 is connected to the box 104 through the door hinge 107 at one end and is fixed to the box 104 through the door lock 106 at the other end.
Preferably, the storage assembly 100 further includes a base 108, the base 108 is further provided with a supporting plate 108a, and the power member 201 is connected to the supporting plate 108a to support and fix the position of the power member 201.
In this embodiment, the road sign storage device further comprises a pushing assembly 200, wherein the pushing assembly 200 comprises a power member 201 and a baffle 202, and the baffle 202 is arranged below the storage assembly 100 and used for stopping the road sign from falling. That is, in the initial state, the barrier 202 is placed under the road sign, preventing the green road sign from falling.
The power member 201 is disposed at the oblique lower side of the green road sign to drive the baffle 202 to rotate, thereby controlling the number of the road signs in the storage assembly 100. The oblique lower direction referred to herein is intended to mean that the power member 201 is disposed under the green road sign and not directly under the green road sign because if the power member 201 is disposed directly under the green road sign, it blocks the falling of the road sign, and thus is disposed obliquely below the green road sign.
Preferably, the power member 201 is in the same plane as the lowest green road sign.
It should be noted that the power member 201 is preferably a motor, and since the motor is driven to rotate at a higher speed, the baffle 202 is controlled to be very small, so that when green road signs are thrown, a plurality of green road signs are thrown at one place, which results in wasting resources gathered by road signs, in this embodiment, the putting assembly 200 further includes a gearbox 203, and one end of the gearbox 203 is connected to the baffle 202 and is connected to the power member 201 at the same time. When the power member 201 drives the gear box 203 to rotate, the gear box 203 is connected with the baffle 202, and then the baffle 202 rotates together with the power member 201.
Preferably, in the present embodiment, the gearbox 203 is a step-variable transmission, which uses gears with a plurality of fixed gear ratios, and according to the type of gear train used, there are two types, namely an axis-fixed transmission (ordinary transmission) and an axis-rotating transmission (planetary transmission), and in the present application, an axis-rotating transmission is used.
It should be noted that, a controller is provided in the detected vehicle, the controller is arranged on the working table in the vehicle, and is used for controlling the throwing of the road signs, so that during the driving process, personnel can make a judgment through the environment detection and differentiation outside the cabin, if the environment is good, a control button of the controller is pressed, the green road signs are thrown from the baffle 202, and similarly, if the environment is poor, the red road signs are thrown from the baffle 202 in another device.
In this embodiment, the baffle 202 is an arc-shaped sheet, the radius of the arc-shaped sheet is greater than the radius of the road sign, and the arc angle of the baffle 202 is 180 ° to 270 °. The advantages of this are: when the road sign falls, the baffle 202 rotates upwards to block the falling of the original penultimate road sign, and when the power member 201 indirectly drives the baffle 202 to rotate, the last road sign (i.e. the road sign in contact with the baffle 202) falls, and simultaneously, because the arc angle of the baffle 202 is 180-270 degrees, the baffle 202 rotates upwards to block the falling of the original penultimate road sign.
It should be noted that, since the flap 202 is for letting the road sign be dropped, the flap 202 rotates counterclockwise when rotating.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (5)
1. The utility model provides a rotatory semi-enclosed nuclear detection puts in device which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the storage component (100) is hollow, the bottom of the storage component is not closed, and the interior of the storage component stores the road signs;
the pushing and placing assembly (200) comprises a power part (201) and a baffle (202), and the baffle (202) is arranged below the storage assembly (100) and used for blocking the road sign from falling off; the power part (201) is arranged below the road signs, drives the baffle (202) to rotate and controls the number of the road signs in the storage assembly (100);
wherein the width of the storage assembly (100) is not less than the diameter of the road signs stored in the storage assembly (100) in a column and not more than twice the diameter of the road signs;
the pushing assembly (200) further comprises a gearbox (203), one end of the gearbox (203) is connected with the baffle (202) and is simultaneously connected with the power part (201); the power part (201) drives the gearbox (203) to rotate, the gearbox (203) is connected with the baffle plate (202), and the baffle plate (202) rotates along with the gearbox; the storage assembly (100) further comprises a base (108), a supporting plate (108a) is further arranged on the base (108), and the power part (201) is connected with the supporting plate (108a) and supports and fixes the position of the power part (201); the storage assembly (100) comprises a guide rail (101), a pressing plate (102), a linear bearing (103) and a box body (104), the guide rail (101) is connected with the upper end and the lower end of the box body (104), the pressing plate (102) is connected with the linear bearing (103), and the linear bearing (103) is sleeved on the guide rail (101); the storage assembly (100) further comprises a door hinge (107), a door panel (105) and a door lock (106); one end of the door panel (105) is connected with the box body (104) through the door hinge (107), and the other end of the door panel is fixed with the box body (104) through the door lock (106).
2. The rotary semi-enclosed nuclear detection delivery apparatus of claim 1, wherein: the baffle (202) is an arc-shaped sheet, and the radius of the baffle is larger than that of the road sign.
3. The rotary semi-enclosed nuclear detection delivery apparatus of claim 2, wherein: the angle of the arc-shaped sheet of the baffle (202) is 180-270 degrees.
4. The rotary semi-enclosed nuclear detection delivery apparatus of claim 3, wherein: the power part (201) drives the arc-shaped sheet to rotate by an angle of 90-180 degrees.
5. The rotary semi-enclosed nuclear detection delivery apparatus of claim 4, wherein: the pressure plate (102) is L-shaped, one surface of the pressure plate is connected with the linear bearing (103), and the other surface of the pressure plate blocks the road sign.
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| CN201811105816.5A CN109188490B (en) | 2018-09-21 | 2018-09-21 | Rotary semi-closed nuclear detection throwing device |
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