Bed sand sampler for deep sampling of bed sand

Abstract

The present invention relates to the technical field of bed sand samplers and discloses a bed sand sampler that is convenient for in-depth sampling of bed sand, comprising a cubic sand sampling barrel, a cubic sand sampling cavity in the sand sampling barrel forming a bottom opening, a sand outlet and a side sealing plate on the side of the sand sampling barrel; the bottom opening of the sand sampling barrel is provided with a bottom sealing plate, when it deviates from the bottom opening and swings upward, the bottom opening is opened, and when it swings from top to bottom to the extreme position, the bottom opening is closed, and the sand sampling barrel is provided with a limiting structure; the top of the sand sampling barrel is connected with a sand sampling rod; the inner side wall of the sand sampling cavity is provided with a facing portion and covered with an elastic membrane layer, the outer periphery of the elastic membrane layer is fixedly connected to the facing portion, and is bulged toward the sand outlet to form a bulging area; when the bed sand fills the sand sampling cavity, the elastic membrane layer is compressed and deformed, and when the side sealing plate opens the sand outlet, it expands toward the sand outlet to restore the deformation, and drives the bed sand toward the sand outlet. In summary, the convenience and sampling integrity of bed sand sampling are improved, and efficient sampling is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of bed sand samplers, and more specifically, to a bed sand sampler that facilitates in-depth sampling of bed sand. Background Art

[0002] Riverbed sampling is a conventional method for studying the physics, chemistry, mechanics, mineral structure, biology and pollution status of underwater sediments in rivers, reservoirs, lakes and near coasts.

[0003] Traditional bed sand sampling devices, such as sand drag barrels, bucket samplers, piston samplers, etc., are mainly limited to sampling surface bed sand and cannot conduct stratified research on bed sand structure. These devices are usually simple in design, with small mouths and built-in capacities, making it difficult to adapt to sampling needs under different hydrogeological conditions.

[0004] In the existing technology, riverbed sampling devices mostly rely on a lot of manpower to drive, the mechanical parts of the sampling device are fixed and cannot be adjusted, the opening and closing door structure is not flexible and cannot be opened and closed automatically, and the sampling process obviously shows a low degree of automation. The sampling process is cumbersome, resulting in low efficiency and lack of convenience in bed sand sampling.

[0005] In addition, the existing bed sand sampling device has limited adaptability to the environment, especially under conditions of deep water or high flow rate, the sampling success rate is not ideal. In particular, the larger sampler is easily affected by the water flow during the sampling process, and there is a disturbing effect of "pushing" and "sweeping", which in turn leads to sample distortion. Summary of the Invention

[0006] The purpose of the present invention is to provide a bed sand sampler that is convenient for deep sampling of bed sand, aiming to solve the problem of insufficient convenience in deep sampling of bed sand in the prior art.

[0007] The present invention is implemented as follows: it includes a cubic sand collecting tube, wherein the sand collecting tube has a cubic sand collecting cavity, the sand collecting cavity penetrates the bottom of the sand collecting tube to form a bottom opening, a sand outlet is formed on the side of the sand collecting tube, and the sand outlet cover has a side cover plate that is swingably arranged to close or open the sand outlet;

[0008] The bottom opening of the sand collecting barrel is covered with a bottom covering plate that is arranged to swing up and down. When the bottom covering plate swings upward away from the bottom opening, the bottom opening is opened. When the bottom covering plate swings from top to bottom to the extreme position, the bottom covering plate closes the bottom opening. The sand collecting barrel is provided with a limiting structure that limits the bottom covering plate from swinging downward away from the bottom opening. A detachable sand collecting rod is connected to the top of the sand collecting barrel.

[0009] The inner side wall of the sand taking cavity has a facing portion arranged toward the sand outlet, the facing portion is covered with an elastic film layer, the outer periphery of the elastic film layer is fixedly connected to the facing portion, and the elastic film layer is arranged to bulge toward the sand outlet to surround and form a bulging area;

[0010] When the bed sand is squeezed to fill the sand taking cavity, the elastic membrane layer is compressed and deformed, and when the side cover plate opens the sand outlet, the elastic membrane layer expands toward the sand outlet and recovers the deformation, driving the bed sand toward the sand outlet.

[0011] Furthermore, a plurality of elastic columns are provided in the bulging area, and the elastic columns are extended toward the sand outlet, one end of the elastic column is connected to the facing portion, and the other end of the elastic column is connected to the elastic membrane layer.

[0012] Furthermore, a flat and non-elastic cardboard is connected to the middle of the elastic film layer, and the elastic film layer is arranged around the outer periphery of the cardboard and connected to the outer periphery of the cardboard; the other ends of the multiple elastic columns are arranged around the outer periphery of the cardboard at intervals.

[0013] Furthermore, a connecting head is protruding from the top of the sand taking tube, and the sand taking rod is threadedly connected to the connecting head; the sand taking rod is connected to a detachable pressure rod, and the middle part of the pressure rod has a connecting section, and the connecting section is threadedly connected to the sand taking rod, and the pressure rod and the sand taking rod are arranged vertically.

[0014] Furthermore, one side of the side covering plate is hinged to the sand collecting barrel, and the other side of the side covering plate is provided with a clamping head, and the sand collecting barrel is provided with a hook. When the side covering plate covers the sand outlet, the hook is engaged with the clamping head to fix the side covering plate and the sand collecting barrel relatively.

[0015] Furthermore, the sand taking tube has an air outlet for discharging air in the sand taking cavity, the sand taking cavity is connected to the outside through the air outlet, the air outlet is located above the sand outlet, and along the circumference of the sand taking tube, the air outlet and the sand outlet are staggered.

[0016] Furthermore, the sand collecting barrel is connected to a rubber cover plate supported by a colloid material and closing or opening the air outlet. The rubber cover plate is arranged on the outer side wall of the sand collecting barrel. The sand collecting barrel is fixedly connected to one side of the rubber cover plate, and the other side of the rubber cover plate is freely arranged.

[0017] Furthermore, the limiting structure includes a limiting ring arranged at the bottom opening, the limiting ring is arranged around the circumference of the bottom opening, one side of the bottom covering plate is hinged to the sand collecting tube, and the other side of the bottom covering plate is freely arranged, and the other side of the bottom covering plate has a pressing portion; when the bottom covering plate swings from top to bottom to the extreme position, the pressing portion presses on the limiting ring from top to bottom, and the bottom covering plate closes the bottom opening.

[0018] Furthermore, the side cover plate has an inward side wall facing the sand extraction cavity, and a plurality of elastically arranged curved pieces are provided on the inward side wall, wherein the lower ends of the curved pieces are fixed to the inward side wall, and the upper ends of the curved pieces are bent upward and arranged freely, and an elastic gap is formed between the curved pieces and the inward side wall;

[0019] When the side covering plate closes the sand outlet and the sand taking cavity is filled with bed sand, the elastic sheet is elastically deformed under pressure and embedded in the bed sand; when the side covering plate is opened, the elastic sheet elastically returns to its original position, applying an elastic pulling force to the bed sand toward the sand outlet.

[0020] Furthermore, the outer periphery of the lower part of the sand collecting tube is provided with an outer peripheral elastic ring and a movable ring that can elastically move up and down. The outer peripheral elastic ring is arranged around the circumference of the sand collecting tube and is located above the bottom opening.

[0021] The movable ring is sleeved on the outer circumference of the peripheral elastic ring and is fixedly connected to the peripheral elastic ring. The movable ring is arranged around the circumference of the sand collecting tube. A plurality of pointed protruding teeth extend downward from the bottom of the movable ring. The plurality of protruding teeth are arranged around the circumference of the movable ring. Adjacent protruding teeth are staggered up and down along the height direction of the movable ring.

[0022] The inner side of the movable ring has a movable inner wall arranged toward the bottom opening. Along the movable ring from bottom to top, the movable inner wall is arranged inwardly and the movable inner part is located below the bottom opening. The top of the movable inner wall has a top step, which is arranged along the circumference of the sand collecting tube and is located below the sand collecting tube. There is a bottom gap between the top step and the bottom of the sand collecting tube, and the bottom gap is filled with a bottom elastic ring, which respectively abuts against the bottom of the sand collecting tube and the top step.

[0023] Compared with the prior art, the bed sand sampler provided by the present invention is convenient for deep sampling of bed sand. Through the cubic sand sampling tube and sand sampling cavity, combined with the automatic opening and closing mechanism of the bottom opening and the cover plate, it can effectively conduct sampling deep into the bottom of the riverbed, ensuring the complete collection of samples and preventing loss during the sampling process.

[0024] The elastic membrane layer in the sand sampling chamber is compressed after the bed sand is filled. When the side cover plate opens the sand outlet, the elastic membrane layer recovers its deformation and pushes the bed sand toward the sand outlet. This not only simplifies the operation process of bed sand sampling, but also significantly improves the convenience of bed sand sampling.

[0025] The limiting structure of the sand sampling tube can effectively prevent the bottom cover plate from being damaged by external forces, thereby enhancing the stability and durability of the sampler. At the same time, the detachable sand sampling rod design makes on-site operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of a bed sand sampler provided by the present invention for facilitating in-depth sampling of bed sand;

[0027] Figure 2 Schematic diagram of the structure of the elastic membrane layer provided by the present invention;

[0028] Figure 3 It is a structural schematic diagram of the extension rod provided by the present invention;

[0029] Figure 4 It is a structural schematic diagram of the pressure rod provided by the present invention;

[0030] Figure 5 This is a schematic diagram illustrating the sampling process of the bed sand sampler provided by the present invention;

[0031] Figure 6 This is a schematic diagram illustrating the sampling process of the bed sand sampler provided by the present invention;

[0032] Figure 7 It is a structural schematic diagram of the peripheral elastic ring and the movable ring provided by the present invention;

[0033] Figure 8 It is a structural schematic diagram of the convex teeth provided by the present invention;

[0034] In the figure: sand taking tube 100, side cover plate 101, curved piece 102, air outlet 103, rubber cover plate 104, elastic membrane layer 105, elastic column 106, cardboard 107, clamping head 108, hook 109, facing portion 110, bottom opening 200, bottom cover plate 201, limiting ring 202, pressing portion 203, bed sand 300, sand taking rod 301, connecting head 302, pressure rod 303, extension rod 304, extension device 305, peripheral elastic ring 400, movable ring 401, protruding teeth 402, movable inner wall 403, top step 404, bottom elastic ring 405. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0037] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] Reference Figure 1-8 The figure shows a preferred embodiment of the present invention.

[0039] The bed sand sampler is convenient for sampling deep bed sand, and includes a cubic sand sampling tube 100, wherein the sand sampling tube 100 has a cubic sand sampling cavity, which penetrates the bottom of the sand sampling tube 100 to form a bottom opening 200, and a sand outlet is formed on the side of the sand sampling tube 100. The sand outlet is covered with a side covering plate 101 that is arranged to swing and close or open the sand outlet.

[0040] The bottom opening 200 of the sand collecting barrel 100 is covered with a bottom covering plate 201 that swings upward. When the bottom covering plate 201 swings upward away from the bottom opening 200, the bottom opening 200 is opened. When the bottom covering plate 201 swings downward from the top to the limit position, the bottom covering plate 201 closes the bottom opening 200. The sand collecting barrel 100 is provided with a restricting structure that restricts the bottom covering plate 201 from swinging downward away from the bottom opening 200. A detachable sand collecting rod 301 is connected to the top of the sand collecting barrel 100.

[0041] The inner side wall of the sand taking chamber has a facing portion 110 arranged toward the sand outlet. The facing portion 110 is covered with an elastic membrane layer 105. The outer periphery of the elastic membrane layer 105 is fixedly connected to the facing portion 110. The elastic membrane layer 105 is arranged to bulge toward the sand outlet, surrounding a bulging area.

[0042] When the bed sand 300 is squeezed and fills the sand removal cavity, the elastic membrane layer 105 is compressed and deformed. When the side cover plate 101 opens the sand outlet, the elastic membrane layer 105 expands toward the sand outlet and recovers the deformation, driving the bed sand 300 toward the sand outlet.

[0043] The bed sand sampler provided above, which facilitates deep sampling of bed sand, can effectively conduct sampling deep into the riverbed through the cubic sand sampling tube 100 and the sand sampling cavity, combined with the bottom opening 200 and the automatic opening and closing mechanism of the cover plate, thereby ensuring complete collection of samples and preventing loss during the sampling process.

[0044] The elastic membrane layer 105 in the sand sampling chamber is compressed after the bed sand 300 is filled. When the side cover plate 101 opens the sand outlet, the elastic membrane layer 105 recovers its deformation and pushes the bed sand 300 toward the sand outlet. This not only simplifies the operation process of sampling the bed sand 300, but also significantly improves the convenience of sampling the bed sand 300.

[0045] The limiting structure of the sand sampling tube 100 can effectively prevent the bottom cover plate 201 from being damaged by external forces, thereby enhancing the stability and durability of the sampler. At the same time, the detachable sand sampling rod 301 design makes on-site operation more convenient.

[0046] In this embodiment, a plurality of elastic columns 106 are provided in the bulging area, and the elastic columns 106 are extended toward the sand outlet. One end of the elastic column 106 is connected to the facing portion 110, and the other end of the elastic column 106 is connected to the elastic membrane layer 105. In this way, the elastic column 106 can provide additional support and elastic recovery force during the sampling process, which helps to more effectively push the bed sand 300 toward the sand outlet after the sand sampling cavity is filled, thereby improving the efficiency and convenience of sampling the bed sand 300.

[0047] In this embodiment, a flat, non-elastic cardboard 107 is connected to the middle of the elastic membrane layer 105. The elastic membrane layer 105 is arranged around the periphery of the cardboard 107 and is connected to the periphery of the cardboard 107. The other ends of the multiple elastic columns 106 are arranged around the periphery of the cardboard 107 at intervals. In this way, the cardboard 107 provides a solid foundation, enhances the stability of the elastic membrane layer 105, and enables the elastic membrane layer 105 to distribute force more evenly when squeezed by the bed sand 300, thereby improving the consistency and reliability of sampling.

[0048] In this embodiment, a connector 302 is protruding from the top of the sand collecting tube 100, and the sand collecting rod 301 is threadedly connected to the connector 302. The threaded connection provides a firm and detachable connection, which facilitates the quick installation and removal of the sand collecting rod 301 before and after sampling, thereby improving the convenience of operation.

[0049] The sand sampling rod 301 is connected to a detachable pressure rod 303. The middle part of the pressure rod 303 has a connecting section, which is threadedly connected to the sand sampling rod 301. The pressure rod 303 is arranged vertically to the sand sampling rod 301. The vertically arranged pressure rod 303 can provide additional support force when needed to help the sand sampling rod 301 be inserted into the riverbed more stably, ensuring the smooth progress of the bed sand 300 sampling process.

[0050] In this embodiment, one side of the side covering plate 101 is hinged to the sand collecting tube 100, and the other side of the side covering plate 101 is provided with a clamping head 108. The sand collecting tube 100 is provided with a hook 109. When the side covering plate 101 covers the sand outlet, the hook 109 is engaged with the clamping head 108 to fix the side covering plate 101 and the sand collecting tube 100 relatively.

[0051] Through this snap-fit ​​connection, the stability of the side cover plate 101 during the sampling process of the bed sand 300 is ensured, accidental opening due to water flow impact or other external forces is prevented, and the integrity of the sample is guaranteed.

[0052] In this embodiment, the sand collecting tube 100 has an air outlet 103 for discharging air in the sand collecting chamber. The sand collecting chamber is connected to the outside through the air outlet 103. The air outlet 103 is located above the sand outlet. Along the circumference of the sand collecting tube 100, the air outlet 103 and the sand outlet are staggered.

[0053] By utilizing the staggered arrangement of the gas outlets 103 , the gas in the sand sampling cavity can be discharged smoothly during the sampling process, thus avoiding the influence of gas accumulation on the sampling and making the sampling process of the bed sand 300 smoother.

[0054] In this embodiment, a rubber cover 104 supported by a colloid material is connected to the sand collecting barrel 100 and closes or opens the air outlet 103. The rubber cover 104 is arranged on the outer wall of the sand collecting barrel 100. One side of the rubber cover 104 is fixedly connected to the sand collecting barrel 100, and the other side of the rubber cover 104 is freely arranged.

[0055] By using the rubber cover 104, a flexible sealing option is provided, and the gas outlet 103 can be opened or closed as needed, further controlling the emission of gas during the sampling process of the bed sand 300.

[0056] In this embodiment, the limiting structure includes a limiting ring 202 provided at the bottom opening 200. The limiting ring 202 is arranged around the circumference of the bottom opening 200. One side of the bottom covering plate 201 is hinged to the sand collecting tube 100, and the other side of the bottom covering plate 201 is freely arranged. The other side of the bottom covering plate 201 has a pressing portion 203. When the bottom covering plate 201 swings from top to bottom to the extreme position, the pressing portion 203 presses on the limiting ring 202 from top to bottom, and the bottom covering plate 201 closes the bottom opening 200.

[0057] The limiting structure precisely controls the swing range of the bottom cover plate 201 through the cooperation of the limiting ring 202 and the pressing portion 203, ensuring the accuracy and reliability of the cover plate when opening and closing the bottom opening 200, and avoiding sampling errors caused by excessive swing or instability.

[0058] The bottom cover plate 201 can also prevent river water or sediment from leaking from the bottom opening 200 during the sampling process. While ensuring the integrity of the sample, the operator can more conveniently control the opening and closing of the bottom cover plate 201, thereby improving the efficiency and convenience of sampling the bed sand 300.

[0059] In this embodiment, the side cover plate 101 has an inward side wall facing the sand extraction cavity. A plurality of elastically arranged curved pieces 102 are provided on the inward side wall. The lower ends of the curved pieces 102 are fixed to the inward side wall, and the upper ends of the curved pieces 102 are bent upward and arranged freely. There is an elastic gap between the curved pieces 102 and the inward side wall.

[0060] When the side covering plate 101 closes the sand outlet and the sand removal chamber is filled with bed sand 300, the elastic sheet is elastically deformed under pressure and embedded in the bed sand 300; when the side covering plate 101 is opened, the elastic sheet elastically returns to its original position, applying an elastic pulling force to the bed sand 300 toward the sand outlet.

[0061] By utilizing the deformation and resetting of the elastic sheet to achieve effective pushing and sand removal of the bed sand 300, the elastic bending sheet 102 can adapt to bed sand 300 conditions of different hardness and density. Whether it is soft or hard bed sand 300, it can effectively sample and release, enhancing the applicability and flexibility of the sampler.

[0062] The elastic effect of the bending piece 102 not only improves the efficiency of sampling, but also ensures the continuity and integrity of the sample, avoids the scattering or loss of the sample due to the opening of the cover plate, and significantly improves the convenience and reliability of the bed sand 300 sampler in practical applications.

[0063] In this embodiment, the top of the sand collecting tube 100 is an extension device 305 of the sand collecting rod 301. The length of the extension rod 304 can be manually spliced ​​according to the water depth at the sand collecting location. Each extension rod 304 is considered to be 1m. Multiple rods can be spliced ​​together and finally connected to the pressure rod 303. The pressure rod 303 is used to apply force to press the sampler into the riverbed.

[0064] In this way, sediment (bottom mud) samples can be collected from water bodies such as near the coast, reservoirs, lakes, rivers and beaches without disturbance sampling, maintaining the natural stratification of sediments. The extension rod 304 can be spliced ​​and extended, and can be easily operated by one person, solving the problem of collecting stratified bottom mud.

[0065] In this embodiment, the outer periphery of the lower portion of the sand collecting tube 100 is provided with an outer elastic ring 400 and a movable ring 401 that elastically moves up and down. The outer elastic ring 400 is arranged around the circumference of the sand collecting tube 100 and is located above the bottom opening. The movable ring 401 is sleeved around the outer periphery of the outer elastic ring 400 and is fixedly connected to the outer elastic ring 400. The movable ring 401 is arranged around the circumference of the sand collecting tube 100.

[0066] A plurality of pointed protruding teeth 402 extend downward from the bottom of the movable ring 401 . The plurality of protruding teeth 402 are arranged around the circumference of the movable ring 401 . Adjacent protruding teeth 402 are staggered vertically along the height direction of the movable ring 401 .

[0067] The inner side of the movable ring 401 has a movable inner wall 403 arranged toward the bottom opening. From bottom to top along the movable ring 401, the movable inner wall 403 is arranged to tilt inward, and the movable inner portion is located below the bottom opening.

[0068] The top of the movable inner wall 403 has a top step 404, which is arranged around the circumference of the sand collecting tube 100 and is located below the sand collecting tube 100. There is a bottom gap between the top step 404 and the bottom of the sand collecting tube 100. The bottom gap is filled with a bottom elastic ring 405, which respectively abuts against the bottom of the sand collecting tube 100 and the top step 404.

[0069] During the sand extraction process, the sand extraction barrel 100 can easily drill into the riverbed by using the multiple protruding teeth 402, and the multiple protruding teeth 402 are arranged in a high-low staggered manner, which facilitates the drilling of the multiple protruding teeth 402 and avoids getting stuck. Secondly, during the drilling process, after the movable ring 401 is compressed, it can elastically move up and down in the height direction under the action of the bottom elastic ring 405 and the outer elastic ring 400, and can achieve circumferential elastic offset within a set range, so that the sand extraction barrel 100 can drill into the riverbed in an elastic vibration state, thereby improving drilling efficiency.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bed sand sampler that facilitates in-depth sampling of bed sand, characterized by: The sand collecting tube comprises a cubic sand collecting chamber, wherein the sand collecting chamber passes through the bottom of the sand collecting tube to form a bottom opening, a sand outlet is formed on the side of the sand collecting tube, and the sand outlet cover has a side cover plate that is swingably arranged to close or open the sand outlet; The bottom opening of the sand collecting barrel is covered with a bottom covering plate that is arranged to swing up and down. When the bottom covering plate swings upward away from the bottom opening, the bottom opening is opened. When the bottom covering plate swings from top to bottom to the extreme position, the bottom covering plate closes the bottom opening. The sand collecting barrel is provided with a limiting structure that limits the bottom covering plate from swinging downward away from the bottom opening. A detachable sand collecting rod is connected to the top of the sand collecting barrel. The inner side wall of the sand taking cavity has a facing portion arranged toward the sand outlet, the facing portion is covered with an elastic film layer, the outer periphery of the elastic film layer is fixedly connected to the facing portion, and the elastic film layer is arranged to bulge toward the sand outlet to surround and form a bulging area; When the bed sand is squeezed and fills the sand taking cavity, the elastic membrane layer is compressed and deformed, and when the side cover plate opens the sand outlet, the elastic membrane layer expands toward the sand outlet and recovers the deformation, driving the bed sand toward the sand outlet; A plurality of elastic columns are provided in the bulging area, and the elastic columns are extended toward the sand outlet, one end of the elastic column is connected to the facing portion, and the other end of the elastic column is connected to the elastic membrane layer; A flat, non-elastic cardboard is connected to the middle of the elastic film layer. The elastic film layer is arranged around the periphery of the cardboard and connected to the periphery of the cardboard. The other ends of the plurality of elastic columns are arranged around the periphery of the cardboard at intervals. The side cover plate has an inward side wall facing the sand taking cavity, and a plurality of elastically arranged curved pieces are provided on the inward side wall. The lower ends of the curved pieces are fixed to the inward side wall, and the upper ends of the curved pieces are bent upward and arranged freely, with elastic spacing between the curved pieces and the inward side wall. When the side cover plate closes the sand outlet and the sand taking cavity is filled with bed sand, the bent piece is elastically deformed under pressure and embedded in the bed sand; when the side cover plate is opened, the bent piece elastically returns to its original position, exerting an elastic pulling force on the bed sand toward the sand outlet; The outer periphery of the lower part of the sand collecting tube is provided with an elastic ring and a movable ring that can move elastically up and down. The outer elastic ring is arranged around the circumference of the sand collecting tube and is located above the bottom opening. The movable ring is sleeved on the outer circumference of the elastic ring and is fixedly connected to the elastic ring. The movable ring is arranged around the circumference of the sand collecting tube. A plurality of pointed protruding teeth extend downward from the bottom of the movable ring. The plurality of protruding teeth are arranged around the circumference of the movable ring. Adjacent protruding teeth are staggered up and down along the height direction of the movable ring. The inner side of the movable ring has a movable inner wall arranged toward the bottom opening. Along the movable ring from bottom to top, the movable inner wall is arranged inwardly and the movable inner part is located below the bottom opening. The top of the movable inner wall has a top step, which is arranged along the circumference of the sand collecting tube and is located below the sand collecting tube. There is a bottom gap between the top step and the bottom of the sand collecting tube, and the bottom gap is filled with a bottom elastic ring, which respectively abuts against the bottom of the sand collecting tube and the top step.

2. The bed sand sampler for deep sampling of bed sand according to claim 1, characterized in that: A connecting head is protruding from the top of the sand taking tube, and the sand taking rod is threadedly connected to the connecting head; the sand taking rod is connected to a detachable pressure rod, and the middle part of the pressure rod has a connecting section, and the connecting section is threadedly connected to the sand taking rod, and the pressure rod and the sand taking rod are arranged vertically.

3. The bed sand sampler for deep sampling of bed sand according to claim 1, characterized in that: One side of the side covering plate is hinged to the sand taking barrel, and the other side of the side covering plate is provided with a clamping head, and the sand taking barrel is provided with a hook. When the side covering plate covers the sand outlet, the hook is engaged with the clamping head to fix the side covering plate and the sand taking barrel relatively.

4. The bed sand sampler for deep sampling of bed sand according to claim 1, characterized in that: The sand taking tube has an air outlet for discharging air in the sand taking cavity. The sand taking cavity is connected to the outside through the air outlet. The air outlet is located above the sand outlet. Along the circumference of the sand taking tube, the air outlet and the sand outlet are staggered.

5. The bed sand sampler for deep sampling of bed sand according to claim 4, characterized in that: The sand collecting barrel is connected to a rubber cover plate supported by a colloid material and closing or opening an air outlet. The rubber cover plate is arranged on the outer side wall of the sand collecting barrel. One side of the rubber cover plate is fixedly connected to the sand collecting barrel, and the other side of the rubber cover plate is freely arranged.

6. The bed sand sampler for deep sampling of bed sand according to claim 1, characterized in that: The limiting structure includes a limiting ring arranged at the bottom opening, and the limiting ring is arranged around the circumference of the bottom opening. One side of the bottom covering plate is hinged to the sand taking tube, and the other side of the bottom covering plate is freely arranged. The other side of the bottom covering plate has a pressing portion; when the bottom covering plate swings from top to bottom to the extreme position, the pressing portion presses on the limiting ring from top to bottom, and the bottom covering plate closes the bottom opening.

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