Underwater surface matrix sampler

Abstract

The invention relates to the technical field of samplers, and discloses a water bottom surface matrix sampler which comprises two outer plates, a plurality of connecting frames are uniformly and fixedly mounted between the side edges of the two outer plates, sliding grooves are formed in the outer surfaces of the two outer plates in a penetrating manner, and sliding blocks are slidably mounted on the inner walls of the two sliding grooves; fixing plates are fixedly installed on the outer surfaces of the sides, close to each other, of the two sliding blocks, a plurality of connecting columns are fixedly installed between the two fixing plates, and a roller is rotationally installed between the outer surfaces of the two ends of the two fixing plates. According to the sampling device, the sampling barrels completing sampling are moved upwards to the top one by one through the lifting belt, so that sampling personnel can conveniently take the sampling barrels completing sampling and replace new sampling barrels, the sampling device does not need to be integrally put in and fished out of the water surface to collect and replace the sampling barrels during sampling operation each time, and the sampling efficiency is improved. The sampling efficiency of the underwater surface matrix can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of samplers, and in particular to a bottom surface matrix sampler. Background Art

[0002] The surface matrix layer is the main material component of the Earth's critical zone, which includes natural rocks, semi-consolidated rocks, Quaternary sediments and weathering residues formed by natural processes below the land surface or the bottom of water bodies (rivers, lakes and sea water), and the soil layer developed on the basis of topsoil parent material. It is the carrier of the surface cover layer and the terrestrial biosphere, the surface rock and soil material layer of the Earth affected by epigenetic geological actions, and the main stratum for energy and element exchange between water vapor and rock and soil minerals, vegetation roots and soil microorganisms in the Earth's critical zone. It is the occurrence zone of various physical and chemical weathering and soil formation and development, and the place where water vapor-liquid conversion in the vadose zone, geochemical cycle, carbon-nitrogen cycle, soil greenhouse gas absorption and generation, leaching and deposition of salt substances, formation and change of permafrost, erosion and sedimentation occur. It is also the main object of human land use and management.

[0003] An existing underwater soil sampler (publication number: CN220289064U) has at least the following disadvantages: the above patent rotates the fixed disk into the soil, and the soil enters through the opening groove of the sampling tube. The scraper can rotate and flip the soil, which can better enter the soil into the sampling tube for collection and processing. The soil directly enters the sampling tube, which effectively prevents the soil from being eroded by water flow; because each time the soil is sampled, the sampling tube needs to be continuously lifted or lowered underwater, which makes the sampling operation cumbersome and affects the sampling efficiency of the underwater surface matrix. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a bottom surface matrix sampler.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A underwater surface matrix sampler comprises two outer plates, a plurality of connecting frames are evenly fixedly installed between the side edges of the two outer plates, the outer surfaces of the two outer plates are penetrated with a slide groove, the inner walls of the two slide grooves are slidably installed with sliders, the outer surfaces of the two sliders close to each other are fixedly installed with a fixing plate, a plurality of connecting columns are fixedly installed between the two fixing plates, and rollers are rotatably installed between the outer surfaces of the two ends of the two fixing plates, the outer surfaces of the two rollers are sleeved with lifting belts, a plurality of sampling covers are evenly fixedly installed on the outer surface of the lifting belt, the sampling cover is a hollow structure, a socket is penetrated at one end of the sampling cover away from the lifting belt, a sampling tube is detachably installed inside the socket through a thread, and a lifting mechanism for driving the fixing plate to move up and down is installed on the outer surface of the outer plate.

[0007] As a further solution of the present invention, the lifting mechanism includes an electric telescopic rod fixedly mounted on the outer surface of the outer plate, the telescopic end of the electric telescopic rod is fixedly mounted on the outer surface of the slider, and a feeding mechanism is installed between one of the outer plates and a roller at the top.

[0008] As a further solution of the present invention, the feeding mechanism includes a worm gear fixedly mounted on the rotation center of a roller located at the top, a worm is rotatably mounted on the outer surface of the fixed plate, the worm is meshed with the worm gear, and a toggle assembly is installed between the worm and the corresponding outer plate.

[0009] As a further solution of the present invention, the toggle assembly includes a one-way bearing, and the rotation center of the worm is installed with a first gear through the one-way bearing. A first rack is fixedly installed on the inner outer surface of an outer plate close to the first gear, and the first gear is intermittently meshed with the first rack.

[0010] As a further solution of the present invention, a sealing mechanism for sealing the mouth of the sampling tube is installed inside the sampling cover, and the sealing mechanism includes two toothed rollers and two guide rollers rotatably installed inside the sampling cover, and the outer surfaces of the two toothed rollers and the two guide rollers are sleeved with steel belts, and the steel belt is provided with tooth grooves meshing with the toothed rollers, the inner surface of the steel belt is in contact with the mouth of the sampling tube, the outer surface of the steel belt is in contact with the inner wall of the sampling cover, and the outer surface of the steel belt near the mouth of the sampling tube is penetrated by a sampling port, and a rotating component is installed between one of the toothed rollers and the corresponding outer plate.

[0011] As a further solution of the present invention, the rotating assembly includes a second gear fixedly mounted at the rotation center of the gear roller, a second rack is fixedly mounted on the inner outer surface of an outer plate close to the second gear, the second rack is located at the lower part of the outer plate, a third rack is fixedly mounted on the outer surface of the upper part of the outer plate, and the second gear is intermittently meshed with the second rack and the third rack respectively.

[0012] As a further solution of the present invention, a limiting mechanism is installed between the sampling cover and the outer plate, and the limiting mechanism includes a guide column fixedly installed on the outer surface of the sampling cover close to the outer plate, and the outer surface of the outer plate is provided with a guide groove matching the movement trajectory of the guide column, and the guide column is slidably installed on the inner wall of the guide groove, and the outer surface of the outer plate close to the top and the bottom thereof are provided with vertical grooves, and the vertical grooves are connected with the guide grooves, and a support assembly is installed between the guide column and the outer plate.

[0013] As a further solution of the present invention, the support assembly includes two support plates fixedly installed on the outer surface of the bottom of the outer plate, the two support plates are respectively arranged on both sides of the vertical groove, and the outer surface of the guide column is fixedly installed with a support block matching the spacing between the two support plates.

[0014] The beneficial effects of the present invention are:

[0015] 1. The sliding block is pushed downward by the telescopic end of the electric telescopic rod, so that the sliding block drives the fixed plate to move downward as a whole. At this time, the first gear will mesh with the first rack at the corresponding position, so that the first gear can drive the worm to rotate through the one-way bearing, so that the worm drives the worm wheel meshed with it to rotate, so that the worm wheel drives the corresponding roller to rotate, so that the roller can drive the lifting belt sleeved on its outer surface to rotate. Multiple sampling covers move a certain distance, so that the sampling barrel installed at the bottom of the lifting belt can move upward, and the next empty sampling barrel moves to the lowest end of the lifting belt for the next sampling operation, so as to repeat this process, and the sampling barrels that have been sampled will move up one by one to the top of the lifting belt, which is convenient for the sampling personnel to take the sampling barrels that have been sampled and replace them with new ones. There is no need to put the sampler as a whole into and take it out of the water to collect and replace the sampling barrels during each sampling operation, which can effectively improve the sampling efficiency of the underwater surface matrix;

[0016] 2. After the sampling is completed, when the lifting belt as a whole drives the sampling cover to move upward, the second gear will drive the steel belt to move in the opposite direction through the gear roller, so that the sampling port opened on the steel belt is misaligned with the plug hole, so that the steel belt can cover the mouth of the sampling tube to prevent the underwater surface matrix in the sampling tube from scattering in the water and affecting the sampling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a water bottom surface matrix sampler proposed by the present invention;

[0018] Figure 2 This is a schematic structural diagram of the installation state of a fixing plate and a lifting belt of a water bottom surface matrix sampler proposed by the present invention;

[0019] Figure 3 This is a schematic structural diagram of the roller and lifting belt installation state of a water bottom surface matrix sampler proposed by the present invention;

[0020] Figure 4 A schematic diagram of the internal structure of a sampling cover of a water bottom surface matrix sampler proposed by the present invention;

[0021] Figure 5 A schematic diagram of the steel belt structure of a water bottom surface matrix sampler proposed by the present invention;

[0022] Figure 6 This is a schematic diagram of the inner structure of an outer plate of a bottom surface matrix sampler proposed by the present invention;

[0023] Figure 7 for Figure 2 A magnified view of the structure at center;

[0024] Figure 8 for Figure 6 Enlarged view of the structure at point B in the middle.

[0025] In the figure: 1, outer plate; 2, connecting frame; 3, slide groove; 4, sliding block; 5, fixed plate; 6, connecting column; 7, roller; 8, lifting belt; 9, sampling cover; 10, gear roller; 11, steel belt; 12, guide roller; 13, sampling port; 14, sampling tube; 15, guide column; 16, support block; 17, guide groove; 18, vertical groove; 19, support plate; 20, worm wheel; 21, worm; 22, first gear; 23, first rack; 24, second gear; 25, jack; 26, second rack; 27, third rack; 28, electric telescopic rod. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] See attached Figure 1 -Attached Figure 8A underwater surface matrix sampler comprises two outer plates 1, a plurality of connecting frames 2 are evenly and fixedly installed between the sides of the two outer plates 1, a slide groove 3 is penetrated through the outer surfaces of the two outer plates 1, a slider 4 is slidably installed on the inner walls of the two slide grooves 3, a fixing plate 5 is fixedly installed on the outer surfaces of the two sliders 4 on the side close to each other, a plurality of connecting columns 6 are fixedly installed between the two fixing plates 5, and a roller 7 is rotatably installed between the outer surfaces of the two ends of the two fixing plates 5, and a lifting belt 8 is sleeved on the outer surfaces of the two rollers 7. When in use, the top of the lifting belt 8 is higher than the water surface, so as to replace the sampling tube 14 installed on the top of the lifting belt 8; a plurality of sampling covers 9 are evenly and fixedly installed on the outer surface of the lifting belt 8, and the sampling cover 9 is a hollow structure, and a plug hole is penetrated at the end of the sampling cover 9 away from the lifting belt 8 25, a sampling tube 14 is detachably installed inside the jack 25 through a thread, and a plurality of drainage holes are provided on the outer surface of the sampling tube 14 so that the underwater surface matrix can enter the sampling tube 14; a lifting mechanism for driving the fixed plate 5 to move up and down is installed on the outer surface of the outer plate 1, and the lifting mechanism includes an electric telescopic rod 28 fixedly installed on the outer surface of the outer plate 1, and the electric telescopic rod 28 has a waterproof effect; the telescopic end of the electric telescopic rod 28 is fixedly installed on the outer surface of the slider 4, and a feeding mechanism is installed between one of the outer plates 1 and a roller 7 located at the top, and the feeding mechanism includes a worm gear 20 fixedly installed at the rotation center of a roller 7 located at the top, and a worm 21 is rotatably installed on the outer surface of the fixed plate 5, and the worm 21 is meshed with the worm wheel 20, and a toggle assembly is installed between the worm 21 and the corresponding outer plate 1.

[0029] When in use, the slide block 4 is pushed downward by the telescopic end of the electric telescopic rod 28, so that the slide block 4 drives the fixing plate 5 to move downward as a whole. At this time, the first gear 22 will mesh with the first rack 23 at the corresponding position, so that the first gear 22 can drive the worm 21 to rotate through the one-way bearing, so that the worm 21 drives the worm wheel 20 meshing with it to rotate, so that the worm wheel 20 drives the corresponding roller 7 to rotate, so that the roller 7 can drive the lifting belt 8 sleeved on its outer surface to rotate. The multiple sampling covers 9 move a certain distance, so that the bottom of the lifting belt 8 The sampling tube 14 installed at the bottom that has completed sampling can move upward, and the next empty sampling tube 14 moves to the lowest end of the lifting belt 8 for the next sampling operation. In this way, the sampling tubes 14 that have completed sampling will be moved up one by one to the top of the lifting belt 8, which is convenient for the sampling personnel to take the sampling tubes 14 that have completed sampling and replace them with new sampling tubes 14. There is no need to put the sampler as a whole into the water and take it out of the water to collect and replace the sampling tubes 14 during each sampling operation, which can effectively improve the sampling efficiency of the underwater surface matrix.

[0030] In this embodiment, the shifting assembly includes a one-way bearing, and the rotation center of the worm 21 is installed with a first gear 22 through the one-way bearing. A first rack 23 is fixedly installed on the inner outer surface of an outer plate 1 close to the first gear 22, and the first gear 22 is intermittently meshed with the first rack 23.

[0031] When the fixed plate 5 drives the lifting belt 8 to move downward as a whole, the first gear 22 can drive the worm 21 to rotate through the one-way bearing; when the fixed plate 5 drives the lifting belt 8 to rise as a whole, the first gear 22 will not drive the worm 21 to rotate through the one-way bearing, so that the lifting belt 8 can only move in the same direction.

[0032] In this embodiment, a blocking mechanism for blocking the mouth of the sampling tube 14 is installed inside the sampling cover 9. The blocking mechanism includes two toothed rollers 10 and two guide rollers 12 rotatably installed inside the sampling cover 9. The outer surfaces of the two toothed rollers 10 and the two guide rollers 12 are sleeved with a steel belt 11. The steel belt 11 is provided with a tooth groove meshing with the toothed roller 10. The inner surface of the steel belt 11 is in contact with the mouth of the sampling tube 14, and the outer surface of the steel belt 11 is in contact with the inner wall of the sampling cover 9, and the steel belt 11 is close to the tube of the sampling tube 14. A sampling port 13 is provided on the outer surface of the mouth, wherein a rotating assembly is installed between one of the gear rollers 10 and the corresponding outer plate 1, and the rotating assembly includes a second gear 24 fixedly installed at the rotation center of the gear roller 10, and a second rack 26 is fixedly installed on the inner outer surface of an outer plate 1 close to the second gear 24, and the second rack 26 is arranged at the lower part of the outer plate 1, and a third rack 27 is fixedly installed on the outer surface of the upper part of the outer plate 1, and the second gear 24 is intermittently meshed with the second rack 26 and the third rack 27 respectively.

[0033] When the sampling cover 9 at the lowest end of the lifting belt 8 moves downward along with the lifting belt 8, the second gear 24 installed on the outer side of the sampling cover 9 will mesh with the second rack 26, so that the second gear 24 can drive the gear roller 10 fixedly installed thereon to rotate, so that the gear roller 10 drives the steel belt 11 meshed with it through the tooth groove to move, so that the sampling port 13 opened on the steel belt 11 moves to the insertion hole 25, thereby opening the tube mouth of the sampling tube 14, so that the sampling cover 9 drives the sampling tube 14 to be inserted The bottom soil is made to enter the sampling tube 14 to realize the sampling operation of the bottom surface matrix. When the sampling is completed, the lifting belt 8 drives the sampling cover 9 to move upward as a whole. The second gear 24 drives the steel belt 11 to move in the opposite direction through the gear roller 10, so that the sampling port 13 opened on the steel belt 11 is misaligned with the insertion hole 25, so that the steel belt 11 can cover the tube mouth of the sampling tube 14, so as to prevent the bottom surface matrix in the sampling tube 14 from being scattered in the water and affecting the sampling effect.

[0034] When the sampling cover 9 located at the top of the lifting belt 8 moves down with the lifting belt 8, the second gear 24 will mesh with the third rack 27, so that the second gear 24 can drive the steel belt 11 to move through the gear roller 10, so that the sampling port 13 opened on the steel belt 11 moves to the insertion hole 25. At this time, the sampling cylinder 14 can be rotated to separate the sampling cylinder 14 from the sampling cover 9, and the sampling cylinder 14 can be taken out from the insertion hole 25. At the same time, the empty sampling cylinder 14 is prepared to be reinstalled at the position just removed so as to continuously perform the sampling operation.

[0035] In this embodiment, a limiting mechanism is installed between the sampling cover 9 and the outer plate 1, and the limiting mechanism includes a guide column 15 fixedly installed on the outer surface of the sampling cover 9 on one side close to the outer plate 1, and a guide groove 17 matching the movement trajectory of the guide column 15 is provided on the outer surface of the outer plate 1, and the guide column 15 is slidably installed on the inner wall of the guide groove 17, and the outer surface of the outer plate 1 close to the top and the bottom thereof are provided with vertical grooves 18, and the vertical grooves 18 are connected with the guide grooves 17, and a support assembly is installed between the guide column 15 and the outer plate 1, and the support assembly includes two support plates 19 fixedly installed on the outer surface of the bottom of the outer plate 1, and the two support plates 19 are respectively arranged on both sides of the vertical groove 18, and a support block 16 matching the spacing between the two support plates 19 is fixedly installed on the outer surface of the guide column 15.

[0036] When in use, the guide column 15 installed on the outer surface of the sampling cover 9 will slide inside the guide groove 17. When the two sampling covers 9 located at the top and bottom of the lifting belt 8 move downward, the guide column 15 installed on the outer side of the sampling cover 9 will slide into the vertical groove 18. At the same time, the support block 16 installed on the outer surface of the guide column 15 will be inserted between the two support plates 19, so that the two support plates 19 can support and limit the position of the sampling cover 9 through the support block 16 and the guide column 15, so that the sampling cover 9 can move up and down stably, which is convenient for better sampling operations.

[0037] From the above description, it can be seen that the above-mentioned embodiment of the present invention achieves the following technical effects: when in use, the device is lifted and the lower half of the device is placed in water to a certain depth, and the slider 4 is pushed downward by the telescopic end of the electric telescopic rod 28, so that the slider 4 drives the fixing plate 5 to move downward as a whole. At this time, the first gear 22 will be meshed with the first rack 23 at the corresponding position, so that the first gear 22 can drive the worm 21 to rotate through the one-way bearing, so that the worm 21 drives the worm wheel 20 meshing with it to rotate, so that the worm wheel 20 drives the corresponding roller 7 to rotate, so that the roller 7 can drive its outer surface The sleeved lifting belt 8 rotates the multiple sampling covers 9 to move a certain distance, so that the sampling tube 14 installed at the bottom of the lifting belt 8 can move upward, and the next empty sampling tube 14 moves to the lowest end of the lifting belt 8 for the next sampling operation. In this way, the sampling tubes 14 that have completed sampling will move up one by one to the top of the lifting belt 8, which is convenient for the sampling personnel to take the sampling tubes 14 that have completed sampling and replace them with new ones. There is no need to put the sampler into the water and take it out of the water to collect and replace the sampling tubes 14 during each sampling operation, which can effectively improve the sampling efficiency of the underwater surface matrix;

[0038] When the sampling cover 9 at the lowest end of the lifting belt 8 moves downward along with the lifting belt 8, the second gear 24 installed on the outer side of the sampling cover 9 will mesh with the second rack 26, so that the second gear 24 can drive the gear roller 10 fixedly installed thereon to rotate, so that the gear roller 10 drives the steel belt 11 meshed with it through the tooth groove to move, so that the sampling port 13 opened on the steel belt 11 moves to the insertion hole 25, thereby opening the tube mouth of the sampling tube 14, so that the sampling cover 9 drives the sampling tube 14 to be inserted The bottom soil is made to enter the sampling tube 14 to realize the sampling operation of the bottom surface matrix. After the sampling is completed, when the lifting belt 8 drives the sampling cover 9 to move up as a whole, the second gear 24 will drive the steel belt 11 to move in the opposite direction through the gear roller 10, so that the sampling port 13 opened on the steel belt 11 is misaligned with the insertion hole 25, so that the steel belt 11 can block the tube mouth of the sampling tube 14 to prevent the bottom surface matrix in the sampling tube 14 from being scattered in the water and affecting the sampling effect.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bottom surface matrix sampler, comprising two outer plates (1), characterized in that: A plurality of connecting frames (2) are evenly fixedly installed between the side edges of the two outer plates (1), a sliding groove (3) is penetrated through the outer surfaces of the two outer plates (1), a slider (4) is slidably installed on the inner walls of the two sliding grooves (3), a fixing plate (5) is fixedly installed on the outer surfaces of the two sliders (4) close to each other, a plurality of connecting columns (6) are fixedly installed between the two fixing plates (5), and a roller (7) is rotatably installed between the outer surfaces of the two ends of the two fixing plates (5), a lifting belt (8) is sleeved on the outer surfaces of the two rollers (7), and a plurality of sampling covers (9) are evenly fixedly installed on the outer surface of the lifting belt (8), the sampling cover (9) is a hollow structure, and a socket (25) is penetrated through the end of the sampling cover (9) away from the lifting belt (8), and a sampling tube (14) is detachably installed in the interior of the socket (25) through a thread, and a lifting mechanism for driving the fixing plate (5) to move up and down is installed on the outer surface of the outer plate (1).

2. A bottom surface matrix sampler according to claim 1, characterized in that: The lifting mechanism comprises an electric telescopic rod (28) fixedly mounted on the outer surface of the outer plate (1), the telescopic end of the electric telescopic rod (28) being fixedly mounted on the outer surface of the slider (4), and a feeding mechanism being installed between one of the outer plates (1) and a roller (7) located at the top.

3. A bottom surface matrix sampler according to claim 2, characterized in that: The feeding mechanism comprises a worm wheel (20) fixedly mounted on the rotation center of a roller wheel (7) located at the top, a worm (21) is rotatably mounted on the outer surface of the fixed plate (5), the worm (21) is meshed with the worm wheel (20), and a toggle assembly is installed between the worm (21) and the corresponding outer plate (1).

4. A bottom surface matrix sampler according to claim 3, characterized in that: The shifting assembly comprises a one-way bearing, a first gear (22) is mounted on the rotation center of the worm (21) via the one-way bearing, a first rack (23) is fixedly mounted on the inner outer surface of an outer plate (1) close to the first gear (22), and the first gear (22) is intermittently meshed with the first rack (23).

5. The underwater surface matrix sampler according to claim 1, characterized in that: A sealing mechanism for sealing the mouth of the sampling tube (14) is installed inside the sampling cover (9), and the sealing mechanism comprises two toothed rollers (10) and two guide rollers (12) rotatably installed inside the sampling cover (9), the outer surfaces of the two toothed rollers (10) and the two guide rollers (12) are sleeved with steel belts (11), and the steel belt (11) is provided with tooth grooves meshing with the toothed rollers (10), the inner surface of the steel belt (11) is in contact with the mouth of the sampling tube (14), the outer surface of the steel belt (11) is in contact with the inner wall of the sampling cover (9), and a sampling port (13) is penetrated through the outer surface of the steel belt (11) near the mouth of the sampling tube (14), and a rotating component is installed between one of the toothed rollers (10) and the corresponding outer plate (1).

6. A bottom surface matrix sampler according to claim 5, characterized in that: The rotating assembly comprises a second gear (24) fixedly mounted on the rotating center of the gear roller (10); a second rack (26) is fixedly mounted on the inner outer surface of an outer plate (1) close to the second gear (24); the second rack (26) is arranged at the lower part of the outer plate (1); a third rack (27) is fixedly mounted on the outer surface of the upper part of the outer plate (1); and the second gear (24) is intermittently meshed with the second rack (26) and the third rack (27), respectively.

7. The underwater surface matrix sampler according to claim 1, characterized in that: A limiting mechanism is installed between the sampling cover (9) and the outer plate (1), and the limiting mechanism comprises a guide post (15) fixedly installed on the outer surface of the sampling cover (9) close to the outer plate (1), the outer surface of the outer plate (1) is provided with a guide groove (17) matching the movement trajectory of the guide post (15), the guide post (15) is slidably installed on the inner wall of the guide groove (17), the outer surface of the outer plate (1) close to the top and the bottom thereof are provided with vertical grooves (18), the vertical grooves (18) are connected with the guide groove (17), and a support assembly is installed between the guide post (15) and the outer plate (1).

8. The underwater surface matrix sampler according to claim 7, characterized in that: The support assembly comprises two support plates (19) fixedly mounted on the outer surface of the bottom of the outer plate (1), the two support plates (19) being respectively arranged on both sides of the vertical groove (18), and a support block (16) matching the spacing between the two support plates (19) being fixedly mounted on the outer surface of the guide column (15).

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