Gamma radiation detection device and detection method

Abstract

The invention discloses a gamma radiation detection device and method, and belongs to the technical field of radiation detection devices.The gamma radiation detection device comprises two chains which are oppositely arranged, a plurality of bases are connected between the two chains, every two bases form a group, and supporting plates are arranged on the sides, away from the chains, of the bases; a shell is mounted on the outer side of the chain; when the height of the raw materials accumulated on the platen is higher, the distance of the magnetic plate moving relative to the transverse plate is farther, the rotating shaft can be overlapped with the magnetic plate by moving by a short distance, and then the distance of the supporting plate moving upwards is controlled, and similarly, when the height of the raw materials accumulated on the platen is lower, the distance of the supporting plate moving upwards is farther, so that the rotating shaft can be overlapped with the magnetic plate. No matter how high the raw materials are stacked, the raw materials can keep the same distance relative to the detection unit after entering the shell through the baffle, the detection accuracy can be improved, and the detection unit can be protected.

Description

Technical Field

[0001] The present invention relates to the technical field of radiation detection devices, and in particular to a gamma radiation detection device and a detection method. Background Art

[0002] Nuclear radiation is the flow of microscopic particles released when an atomic nucleus transforms from one structure or energy state to another structure or energy state. Nuclear radiation can cause ionization or excitation of matter, so it is called ionizing radiation.

[0003] Chinese patent CN219625714U discloses a channel-type radiation detection instrument, which transmits objects through the detection channel through a transmission belt, and lifts the placement plate and drives it to rotate through a driving component, so as to comprehensively detect nuclear radiation on the objects. After the detection is completed, the objects are transmitted out through the transmission belt, which is safer and more reliable, and simpler and more convenient to operate.

[0004] The above-mentioned device drives the raw materials to move in the vertical direction through the telescopic cylinder, and uses the radiation detector to detect the raw materials. However, in actual use, the telescopic cylinder cannot adjust the rising distance of the material according to the height of the material, so that the distance from the material to the detector is not stable enough, which in turn affects the detection accuracy. In summary, the above-mentioned device still has room for improvement.

[0005] Therefore, it is necessary to provide a γ radiation detection device and a detection method to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a gamma radiation detection device and a detection method to solve the problem that the existing device proposed in the above background technology drives the raw material to move in the vertical direction by means of a telescopic cylinder, and uses a radiation detector to detect the raw material, but in actual use, the telescopic cylinder cannot adjust the rising distance of the material according to the height of the material, so that the distance from the material to the detector is not stable enough, thereby affecting the detection accuracy.

[0007] Based on the above ideas, the present invention provides the following technical solutions: a gamma radiation detection device, comprising two groups of chains arranged opposite to each other, a plurality of bases connected between the two groups of chains, the plurality of bases are arranged in groups of two, and a support plate is arranged on the side of the base away from the chain, a shell is installed on the outside of the chain, a detection unit for detecting radiation is suspended on the top wall inside the shell, sliders are slidably arranged at both ends of the base, and a support rod is hinged between the slider and the support plate, a rotating shaft is rotatably arranged in the base, the rotating shaft passes through the slider and is threadedly connected to the slider, a driven gear is sleeved on the end of the rotating shaft through a clamping assembly, and an upper rack meshing with the driven gear is arranged on the outside of the chain; A transverse plate is provided on the side wall of the inner cavity of the shell, and the transverse plate is rotatably matched with the shell. An adsorption unit that cooperates with the clamping assembly is provided on the transverse plate. A baffle is hinged at one end of the shell. When the table loaded with materials is sent into the interior of the shell as the chain rotates, the materials on the top of the table will contact the baffle and drive the baffle to deflect. During the deflection of the baffle, the position of the adsorption unit can be adjusted to control the meshing time of the driven gear and the upper rack.

[0008] As a further solution of the present invention: a spring seat is fixedly arranged on the inner wall of the shell, and a tension spring is fixedly arranged between the spring seat and the transverse plate.

[0009] As a further solution of the present invention: the clamping assembly includes a clamping block arranged on the outer circumferential wall of the rotating shaft and elastically matched with the rotating shaft, a clamping groove matching with the clamping block is opened on the inner wall of the driven gear, a pull plate is slidably arranged on one end of the rotating shaft close to the driven gear, a pull rope is fixedly arranged between the pull plate and the clamping block, and a magnetic block is fixedly embedded on the end surface of the pull plate away from the pull rope.

[0010] As a further solution of the present invention: the adsorption unit is a magnetic plate, the horizontal plate is arranged in a "U" shape as a whole, the magnetic plate is slidably arranged in the horizontal plate, and the inner side surface of the horizontal plate is provided with openings at both ends, and the side of the magnetic plate opposite to the magnetic block has different magnetic poles.

[0011] As a further solution of the present invention: a horizontal axis is fixedly provided at the top of the baffle, and the horizontal axis is rotatably matched with the shell. A main gear is fixedly sleeved on the outside of the horizontal axis, and a secondary gear is meshed on the outside of the main gear. A winding wheel is connected to the side of the secondary gear close to the shell, and a traction rope is connected between the magnetic plate and the winding wheel.

[0012] As a further solution of the present invention: the inner top wall and the bottom wall of the horizontal plate are both provided with strip grooves that slide with the magnetic plate, the magnetic plate slides in the strip grooves, the inner bottom surface of the strip groove below is provided with an insertion hole, the bottom surface of the magnetic plate is elastically connected with a protrusion that cooperates with the insertion hole, the protrusion is away from one end of the magnetic plate and is located at the edge and is set as a cone.

[0013] As a further solution of the present invention: a pressure strip is elastically connected to the bottom of the horizontal plate, and a plurality of top rods matching with the sockets are fixedly arranged on a side of the pressure strip close to the horizontal plate, and the cross-sections of the top rods and the sockets are both set to be T-shaped, and protrusions are fixedly arranged on the inner wall of the shell, and the protrusions are arranged at the two end positions below the pressure strip, and a boss is arranged on the inner side of the magnetic plate, and the boss is fixedly connected to the inner bottom surface of the horizontal plate, and both ends of the boss are set to be inclined surfaces.

[0014] As a further solution of the present invention: sprockets are provided at both ends of the chain.

[0015] As a further solution of the present invention: two sections of external threads with opposite rotation directions are arranged on the outer peripheral surface of the rotating shaft.

[0016] A method for detection using the above-mentioned gamma radiation detection device includes the following steps: the base is driven to move by a chain, and when the base enters the shell, the material will contact the baffle and drive the baffle to deflect; the position of the adsorption unit can be adjusted by the deflection degree of the baffle, thereby controlling the meshing time of the driven gear and the upper rack, and then controlling the rising height of the support plate, so that the distance between the raw material on the support plate and the detection unit remains constant.

[0017] Compared with the prior art, the beneficial effect of the present invention is that: when the height of the raw materials stacked on the table is higher, the distance that the magnetic plate moves relative to the cross plate is longer, so that the rotating shaft can coincide with the magnetic plate by moving a shorter distance, thereby controlling the distance that the support plate moves upward. Similarly, when the height of the raw materials stacked on the table is lower, the distance that the support plate moves upward is longer, so that no matter how high the raw materials are stacked, the raw materials can maintain the same distance relative to the detection unit after passing through the baffle and entering the shell, which is beneficial to improving the accuracy of detection and can protect the detection unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the installation of the horizontal plate of the present invention; Figure 3 It is a schematic diagram of the coordination of the horizontal plate, the pressure strip and the protrusion of the present invention; Figure 4 is a cross-sectional view of the present invention; Figure 5 The present invention Figure 4 A schematic diagram of the enlarged structure at point A; Figure 6 It is a schematic diagram of the cooperation between the support plate and the base of the present invention; Figure 7 The present invention Figure 6 A schematic diagram of the enlarged structure at C; Figure 8 The present invention Figure 6 A schematic diagram of the enlarged structure at B; Fig. 9 It is a schematic diagram of the cooperation between the driven gear and the upper rack of the present invention; Fig.10 It is a schematic diagram of the connection structure between the clamp block and the pull plate of the present invention; Fig.11 It is a schematic diagram of the cooperation between the table plate and the support plate of the present invention; Fig.12 It is a schematic diagram of the structure of the ejector pin and the protrusion of the present invention.

[0019] In the figure: 1, housing; 2, horizontal axis; 3, secondary gear; 4, traction rope; 5, guide wheel; 6, support plate; 7, base; 701, positioning rod; 702, slider; 703, support rod; 8, chain; 9, baffle; 10, detection unit; 11, protrusion; 12, pressure strip; 1201, top rod; 1202, vertical rod; 13, horizontal plate; 1301, jack; 1302, opening; 14, lower rack; 15, winding wheel; 16, support Rod; 17, upper rack; 18, magnetic plate; 1801, connector; 19, rotating shaft; 1901, driven gear; 1902, clamping block; 20, tension spring; 21, connecting block; 2101, positioning strip; 22, positioning plate; 23, boss; 2301, inclined surface; 24, pull plate; 25, pull rope; 26, protrusion; 2601, conical surface; 27, table; 2701, positioning column; 28, pin shaft; 29, pressure rod; 30, support strip. DETAILED DESCRIPTION

[0020] like Figure 1-Figure 10 As shown, a gamma radiation detection device and detection method include two sets of chains 8 arranged opposite to each other, and a plurality of bases 7 are connected between the two sets of chains 8. Specifically, the plurality of bases 7 are arranged in pairs, and a support plate 6 is arranged on one side of the base 7 away from the chain 8. The support plate 6 can move in the vertical direction relative to the base 7. Figure 1 , Fig.11 As shown, in actual use, the platform 27 carrying the material is inserted between two adjacent support plates 6 to transport the material through the chain 8, and a shell 1 is arranged on the periphery of the chain 8, and a detection unit 10 for detecting radiation is suspended on the top wall of the shell 1; Slide blocks 702 are slidably provided at both ends of the base 7, and a support rod 703 is hinged between the slider 702 and the support plate 6. In order to drive the slider 702 to move relative to the base 7, a rotating shaft 19 is also rotatably provided in the base 7. The outer side of the rotating shaft 19 is provided with two sections of external threads with opposite rotation directions, so that the rotating shaft 19 passes through the slider 702 and is threadedly connected with the slider 702. Through this structure, the support plate 6 can be driven to move in the vertical direction. A driven gear 1901 is rotatably sleeved on the outer side of the rotating shaft 19 and near the end, and the driven gear 1901 cooperates with the rotating shaft 19 through a clamping assembly. An upper rack 17 meshing with the driven gear 1901 is provided on the outer side of the chain 8, and the upper rack 17 is located at the upper half of the chain 8; A transverse plate 13 is provided on the side wall of the inner cavity of the housing 1. The transverse plate 13 is rotatably matched with the housing 1. In the initial state, the transverse plate 13 is in a horizontal state. Figure 4-Figure 9As shown, the transverse plate 13 is provided with an adsorption unit matched with the snap-on assembly, and a baffle 9 is hinged at one end of the shell 1. When the table plate 27 loaded with materials is sent into the interior of the shell 1 as the chain 8 rotates, the materials on the top of the table plate 27 will contact with the baffle 9 and drive the baffle 9 to deflect. During the deflection of the baffle 9, the position of the adsorption unit can be adjusted to control the meshing time of the driven gear 1901 and the upper rack 17, thereby controlling the upward moving distance of the support plate 6.

[0021] Reference Fig.10 As shown, the clamping assembly includes a clamping block 1902 which is arranged on the outer peripheral wall of the rotating shaft 19 and elastically cooperates with the rotating shaft 19. The clamping block 1902 can move relative to the diameter direction of the rotating shaft 19, and a clamping groove which cooperates with the clamping block 1902 is opened on the inner wall of the driven gear 1901. A circular pull plate 24 is slidably arranged at one end of the rotating shaft 19 close to the driven gear 1901, and a pull rope 25 is fixedly arranged between the pull plate 24 and the clamping block 1902. The pull rope 25 passes through the rotating shaft 19 and slidably cooperates with it, and a magnetic block is fixedly embedded on the end face of the pull plate 24 away from the pull rope 25.

[0022] Reference Figure 7-Figure 9 As shown, the adsorption unit is a magnetic plate 18. Specifically, the horizontal plate 13 is configured as a "U" shape as a whole, and the magnetic plate 18 is slidably disposed in the horizontal plate 13, and openings 1302 are provided at both ends of the inner side surface of the horizontal plate 13, so that the end of the rotating shaft 19 can enter into the horizontal plate 13 through the opening 1302 and fit with the magnetic plate 18, and the side of the magnetic plate 18 opposite to the magnetic block has different magnetic poles.

[0023] In order to connect the baffle 9 with the magnetic plate 18 so that the position of the magnetic plate 18 can be adjusted during the rotation of the baffle 9, a horizontal axis 2 is provided at the top of the baffle 9. Figure 1-Figure 4 As shown, the horizontal axis 2 passes through the baffle 9 and is fixedly connected to the baffle 9, and both ends of the horizontal axis 2 are rotatably matched with the shell 1 through bearings. The outer fixed sleeve of the horizontal axis 2 is provided with a main gear, and a sub-gear 3 meshing with the active tooth is provided at the lower position of the horizontal axis 2. The sub-gear 3 is connected to a winding wheel 15 on the side close to the shell 1, so that the sub-gear 3 can drive the winding wheel 15 to rotate synchronously, and a traction rope 4 is connected between the magnetic plate 18 and the winding wheel 15. Through this structure, when the baffle 9 rotates, the traction rope 4 can be reeled in by utilizing the meshing between the main gear and the sub-gear 3, thereby driving the magnetic plate 18 to slide relative to the horizontal plate 13.

[0024] In actual use, the table 27 carrying the raw materials is inserted between two adjacent support plates 6, and the table 27 is driven by the rotation of the chain 8 to enter the shell 1 for inspection. In the process of the table 27 passing through the baffle 9 to enter the shell 1, the material on the top of the table 27 will contact the baffle 9 and drive the baffle 9 to deflect. According to the different stacking heights of the materials on the top of the table 27, the deflection angle of the baffle 9 is also different. According to the above description, during the rotation of the baffle 9, the meshing of the main gear and the sub-gear 3 can drive the winding wheel 15 to rotate, and then the traction rope 4 is wound up, so that the traction rope 4 pulls the magnetic plate 18 in the direction close to the baffle 9. Specifically, the higher the raw materials stacked on the top of the table 27, the longer the sliding distance of the magnetic plate 18 relative to the cross plate 13. When the chain 8 drives the raw materials on the table 27 to pass over the baffle 9 and continue to move, the driven gear 1901 connected to the rotating shaft 19 will mesh with the upper rack 17, so that the driven gear 1901 can drive the rotating shaft 19 to rotate. Since the rotating shaft 19 is threadedly connected to the slider 702, the two sliders 702 can be driven to approach each other during the rotation of the rotating shaft 19, and then the support plate 6 is driven to move upward through the support rod 703, so as to shorten the distance between the material on the table 27 and the detection unit 10. When the rotating shaft 19 enters the cross plate 13 through the opening 1302 and fits with the magnetic plate 18, the suction force of the magnetic plate 18 on the magnetic block can prompt the pull plate 24 to move outward, and the pull plate 24 can pull the card block 1902 through the pull rope 25, so that one end of the card block 1902 is out of the card slot, so that the driven gear 19 01 is disconnected from the rotating shaft 19. At this time, the driven gear 1901 is in a state of self-rotation, and the support plate 6 will also maintain a certain height, which is beneficial for the detection unit 10 to detect the raw materials on the table 27. Specifically, the higher the height of the raw materials piled on the table 27, the farther the magnetic plate 18 moves relative to the cross plate 13, so that the rotating shaft 19 can move a shorter distance to coincide with the magnetic plate 18, thereby controlling the upward movement distance of the support plate 6. Similarly, when the height of the raw materials piled on the table 27 is low, the support plate 6 can move upward a farther distance. In summary, no matter how the height of the raw materials is, the raw materials can maintain the same distance relative to the detection unit 10 after passing through the baffle 9 and entering the shell 1, which is beneficial to improving the accuracy of the detection and can protect the detection unit 10.

[0025] like Figure 2-Figure 9 , Fig.12As shown, the inner top wall and the bottom wall of the horizontal plate 13 are both provided with strip grooves that are slidably matched with the magnetic plate 18, so that the magnetic plate 18 slides in the strip grooves, and the inner bottom surface of the strip groove located below is provided with a plug hole 1301, and the bottom surface of the magnetic plate 18 is elastically connected with a protrusion 26 that is matched with the plug hole 1301, and the protrusion 26 is away from one end of the magnetic plate 18 and is located at the edge and is set as a conical surface 2601, when the protrusion 26 is in a pop-up state and inserted into the inside of the plug hole 1301, the conical surface 2601 can contact with the inner wall of the plug hole 1301, through this structure, when the force between the protrusion 26 and the inner wall of the plug hole 1301 increases, the protrusion 26 can move out of the plug hole 1301, and the cooperation between the protrusion 26 and the plug hole 1301 can keep the magnetic plate 18 stable during the overlap of the rotating shaft 19 and the magnetic plate 18; A pressure strip 12 is elastically connected to the bottom of the horizontal plate 13. A plurality of top rods 1201 matching with the insertion holes 1301 are fixedly arranged on one side of the pressure strip 12 close to the horizontal plate 13. The top rods 1201 correspond to the insertion holes 1301 one by one. The cross sections of the top rods 1201 and the insertion holes 1301 are both T-shaped. When the top rods 1201 are fully inserted into the insertion holes 1301, the top surface of the top rods 1201 is parallel to the bottom surface of the lower strip groove, so that the bottom surface of the lower strip groove is a complete plane structure. Figure 1-Figure 3 As shown, a protrusion 11 is fixedly provided on the inner wall of the housing 1, and two protrusions 11 are provided and are arranged at the two end positions below the pressure strip 12, so that the pressure strip 12 can contact with the two protrusions 11 during the deflection of the horizontal plate 13. When the horizontal plate 13 and the pressure strip 12 deflect downward, the pressure strip 12 will contact with the protrusion 11, so that the pressure strip 12 can be close to the horizontal plate 13; Combination Figure 1-Figure 3 , Fig. 9 As shown, a pin shaft 28 is fixedly arranged on the outer side of the horizontal plate 13 and at one end close to the baffle 9, and the pin shaft 28 is inserted into the housing 1 and rotates with the housing 1, and a spring seat is fixedly arranged on the inner wall of the housing 1, and a tension spring 20 is fixedly arranged between the spring seat and the horizontal plate 13, and the tension spring 20 is located at one end of the horizontal plate 13 away from the pin shaft 28. In the initial state, the horizontal plate 13 can be kept horizontal by the tension spring 20; Combination Figure 5-Figure 7 As shown, a boss 23 is provided inside the magnetic plate 18, and the boss 23 is fixedly connected to the inner bottom surface of the horizontal plate 13, and both ends of the boss 23 are provided with inclined surfaces 2301. When the rotating shaft 19 moves relative to the horizontal plate 13, the rotating shaft 19 can pass through the boss 23; Reference Fig. 9As shown, for two rotating shafts 19 in one group, the driven gears 1901 are sleeved at different ends of the two rotating shafts 19, and the magnetic plate 18 and the upper rack 17 on one side of the shell 1 are staggered with the magnetic plate 18 and the upper rack 17 on the other side of the shell 1, so that after the two adjacent rotating shafts 19 enter the shell 1, the driven gears 1901 on the two rotating shafts 19 can mesh with the upper rack 17 at the same time, and the ends of the two rotating shafts 19 can fit with the magnetic plate 18 at the same time. Through this structure, the support plates 6 on the two adjacent bases 7 can be driven to rise synchronously; In actual use, after the baffle 9 deflects and pulls the magnetic plate 18 to the corresponding position, the cooperation between the protrusion 26 and the socket 1301 can keep the magnetic plate 18 stable, and when the table 27 completely passes through the detection unit 10, the ends of the two adjacent shafts 19 move to the boss 23, and the cross plate 13 can be driven to deflect downward by squeezing the inclined surface 2301 on the boss 23 by the end of the shaft 19. In this process, the protrusion 11 limits the pressure of the pressure strip 12, so that the pressure strip 12 can be close to the cross plate 13, so that the top rod on the pressure strip 12 1201 can be inserted into the socket 1301 and lift the protrusion 26 so that the protrusion 26 is placed on the bottom of the strip groove, and the magnetic plate 18 slides down along the inclined cross plate 13 to the initial position. After that, the next group of bases 7 can drive the raw materials into the shell 1 for inspection. In summary, this device cooperates with the boss 23 through the set rotating shaft 19, so that after the material passes through the detection unit 10, the magnetic plate 18 can be reset in time, which is conducive to the next group of raw materials entering the shell 1, making the overall inspection process more consistent and efficient.

[0026] like Figure 1-Figure 4 As shown, sprockets are provided at both ends of the chain 8, so that the chain 8 is sleeved on the outside of the sprocket, and a vertical plate is provided on the outside of the chain 8, a round shaft is fixedly installed on the sprocket, the round shaft passes through the vertical plate and is rotatably connected thereto, a motor is installed on one of the vertical plates, and the motor output shaft is transmission-connected to the round shaft passing through one end of the vertical plate, so as to drive the chain 8 to rotate. Since it is a common structure for driving the chain 8 to rotate, the round shaft, the vertical plate and other components are not marked in the accompanying drawings.

[0027] A connecting shaft is provided at the sub-gear 3, so that the sub-gear 3 is fixedly sleeved on the connecting shaft, and the connecting shaft is rotatably connected to the housing 1. The above-mentioned winding wheel 15 is fixedly sleeved on the outside of the connecting shaft, and a guide wheel 5 is provided directly below the winding wheel 15, so that the traction rope 4 is bypassed from the outside of the guide wheel 5, thereby improving the stability of the traction rope 4.

[0028] The detection unit 10 may be a device such as a radiation detector. Since it is a mature device, the specific working principle of the detector will not be described in detail.

[0029] Combination Figure 1-Figure 8As shown, a lower rack 14 is provided on the inner wall of the shell 1. When the base 7 moves to the lower part of the chain 8 along with the chain 8, the driven gear 1901 on the rotating shaft 19 can engage with the lower rack 14, thereby driving the rotating shaft 19 to rotate in the opposite direction, thereby driving the slider 702 and the support plate 6 to reset for the next use. The lower rack 14 can be fixedly connected to the shell 1 through a cross bar.

[0030] The top surface of the base 7 is provided with a guide groove, so that the slider 702 slides in the guide groove, and both ends of the rotating shaft 19 pass through the base 7 and are rotatably connected thereto through bearings. A limit spring is installed at the inner end surface of the guide groove, and the limit spring can be sleeved on the outer side of the rotating shaft 19. Through this structure, when the slider 702 is reset by meshing with the driven gear 1901 through the lower rack 14, the limit spring can be compressed, which is conducive to the slider 702 to re-engage with the rotating shaft 19 later. There are many ways to cooperate with the chain 8. Specifically, the rotating shaft 19 can pass through the chain 8 and cooperate with it, or a joint can be pre-installed on the chain 8 so that the rotating shaft 19 cooperates with the joint. Since installing a rigid part between the two chains 8 is a mature technical means in the mechanical field, the cooperation between the chain 8 and the rotating shaft 19 is not described in detail here.

[0031] The rotating shaft 19 passes through one end of the chain 8 and is rotatably sleeved with a connecting block 21, and a positioning bar 2101 is integrally formed on the bottom surface of the connecting block 21, and a positioning plate 22 is provided on the side of the chain 8 close to the inner wall of the shell 1, and the positioning plate 22 is fixedly connected to the inner wall of the shell 1 through an L-shaped support rod 16, and a positioning groove is provided on the top surface of the positioning plate 22 for sliding cooperation with the positioning bar 2101, and the cross-sections of the positioning bar 2101 and the positioning groove are both set to be T-shaped. Specifically, when the chain 8 drives the base 7 to rotate to the upper part, the connecting block 21 at the end of the rotating shaft 19 can move above the positioning plate 22, and the positioning bar 2101 can be inserted into the positioning groove, so as to limit the rotating shaft 19 and prevent the rotating shaft 19 from moving in the vertical direction.

[0032] A pressure rod 29 is fixedly provided on the top surface of the connecting block 21, and a positioning rod 701 is fixedly provided on the end of the base 7. The pressure rod 29 and the positioning rod 701 are both attached to the outside of the chain 8 to limit the base 7 and the connecting block 21 and prevent the base 7 and the connecting block 21 from rotating relative to the chain 8.

[0033] The upper rack 17 is fixedly connected to the positioning plate 22 via a fixing rod. In actual use, support bars 30 can be provided at both the upper and lower parts of the chain 8. The support bars 30 are located at the bottom of the chain 8 to support the chain 8 so that the chain 8 can run stably. Specifically, the upper support bar 30 is fixedly connected to the positioning plate 22, and the lower support bar 30 can be fixedly connected to the shell 1 via an L-shaped reinforcement rod.

[0034] A T-shaped connector 1801 is fixedly provided at the end of the magnetic plate 18 , one end of the traction rope 4 is fixedly connected to the connector 1801 , and the other end of the traction rope 4 is fixedly connected to the outer peripheral wall of the winding wheel 15 .

[0035] A groove that slides with the block 1902 is formed on the outer wall of the rotating shaft 19, and a first spring is fixedly arranged between the inner end surface of the groove and the block 1902. A circular hole that slides with the pull plate 24 is formed at the end of the rotating shaft 19, and a spring is fixedly arranged between the inner end surface of the circular hole and the pull plate 24.

[0036] Positioning holes are provided on the top surface of the support plate 6 and at both ends thereof, and positioning posts 2701 matching the positioning holes are fixedly provided on the bottom surface of the table top 27 , so that it is convenient for the staff to plug the table top 27 onto the support plate 6 .

[0037] Vertical rods 1202 are fixedly arranged on the top surface of the pressure strip 12 and at both ends thereof, and grooves are provided on the bottom surface of the cross plate 13 for sliding cooperation with the vertical rods 1202. The cross-sections of the vertical rods 1202 and the grooves are both T-shaped, and a second spring is sleeved on the outer side of the vertical rods 1202, and the second spring is located between the pressure strip 12 and the cross plate 13, so as to realize elastic cooperation between the pressure strip 12 and the cross plate 13.

[0038] The bottom surface of the magnetic plate 18 is provided with a mounting groove which is slidably matched with the protrusion 26 , and a return spring is fixedly arranged between the inner end surface of the mounting groove and the protrusion 26 .

Claims

1. A gamma radiation detection device, comprising two groups of chains arranged opposite to each other, a plurality of bases connected between the two groups of chains, the plurality of bases being arranged in groups of two, and a support plate being arranged on a side of the base away from the chain, a shell being installed on the outer side of the chain, and a detection unit for detecting radiation being suspended on the top wall of the shell, characterized in that: Slide blocks are slidably arranged at both ends of the base, and a support rod is hinged between the slide block and the support plate. A rotating shaft is rotatably arranged in the base, the rotating shaft passes through the slide block and is threadedly connected to the slide block, and a driven gear is sleeved on the end of the rotating shaft through a clamping assembly, and an upper rack meshing with the driven gear is arranged on the outer side of the chain; A transverse plate is provided on the side wall of the inner cavity of the shell, and the transverse plate is rotatably matched with the shell. An adsorption unit that cooperates with the clamping assembly is provided on the transverse plate. A baffle is hinged at one end of the shell. When the table loaded with materials is sent into the interior of the shell as the chain rotates, the materials on the top of the table will contact the baffle and drive the baffle to deflect. During the deflection of the baffle, the position of the adsorption unit can be adjusted to control the meshing time of the driven gear and the upper rack.

2. A gamma radiation detection device according to claim 1, characterized in that: A spring seat is fixedly arranged on the inner wall of the shell, and a tension spring is fixedly arranged between the spring seat and the transverse plate.

3. A gamma radiation detection device according to claim 2, characterized in that: The clamping assembly includes a clamping block arranged on the outer circumferential wall of the rotating shaft and elastically matched with the rotating shaft, a clamping groove matched with the clamping block is opened on the inner wall of the driven gear, a pull plate is slidably arranged on one end of the rotating shaft close to the driven gear, a pull rope is fixedly arranged between the pull plate and the clamping block, and a magnetic block is fixedly embedded on the end surface of the pull plate away from the pull rope.

4. A gamma radiation detection device according to claim 3, characterized in that: The adsorption unit is a magnetic plate, and the horizontal plate is set in a "U" shape as a whole. The magnetic plate is slidably set in the horizontal plate, and the inner side of the horizontal plate is provided with openings at both ends. The side of the magnetic plate opposite to the magnetic block has different magnetic poles.

5. A gamma radiation detection device according to claim 4, characterized in that: A horizontal axis is fixedly set at the top of the baffle, and the horizontal axis is rotatably matched with the shell. A main gear is fixedly sleeved on the outside of the horizontal axis, and a secondary gear is meshed on the outside of the main gear. A winding wheel is connected to the side of the secondary gear close to the shell, and a traction rope is connected between the magnetic plate and the winding wheel.

6. A gamma radiation detection device according to claim 5, characterized in that: The inner top wall and bottom wall of the horizontal plate are both provided with strip grooves that slide with the magnetic plate. The magnetic plate slides in the strip grooves. The bottom surface of the strip groove below is provided with an insertion hole. The bottom surface of the magnetic plate is elastically connected with a protrusion that cooperates with the insertion hole. The protrusion is away from one end of the magnetic plate and is located at the edge and is set as a cone.

7. A gamma radiation detection device according to claim 6, characterized in that: A pressure strip is elastically connected to the bottom of the horizontal plate, and a side of the pressure strip close to the horizontal plate is fixedly provided with a plurality of top rods matching with the sockets, and the cross-sections of the top rods and the sockets are both set to be T-shaped, and protrusions are fixedly provided on the inner wall of the shell, and the protrusions are set at the two end positions below the pressure strip, and a boss is provided on the inner side of the magnetic plate, and the boss is fixedly connected to the inner bottom surface of the horizontal plate, and both ends of the boss are set to be inclined surfaces.

8. A gamma radiation detection device according to claim 1, characterized in that: Sprocket wheels are arranged at both ends of the chain.

9. A gamma radiation detection device according to claim 1, characterized in that: The outer peripheral surface of the rotating shaft is provided with two sections of external threads with opposite rotation directions.

10. A method for detecting using the gamma radiation detection device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: the base is driven to move by a chain, and when the base enters the shell, the material contacts the baffle and drives the baffle to deflect; the position of the adsorption unit can be adjusted by the degree of deflection of the baffle, thereby controlling the meshing time of the driven gear and the upper rack, and then controlling the rising height of the support plate, so that the distance between the raw material on the support plate and the detection unit remains constant.

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