Soil sampling device for soil pollution control

Abstract

The invention relates to the technical field of soil sampling, in particular to a soil sampling device for soil pollution treatment. Comprising a sampling plate and a telescopic support fixedly connected with the lower end of the sampling plate. The lower end of the telescopic support is fixedly connected with a cutter; the upper end of the sampling plate is fixedly connected with a pedal; the pedal extends towards the inner side of the sampling plate and is movably connected with a sampling rod; the lower position of the sampling rod is fixedly connected with a connecting disc; a first unfolding groove is formed in one vertical edge of the sampling plate; the sampling device is folded into a plate shape, so that the sampling plate is expanded and sampled in the circumferential direction after entering the soil, compared with a traditional soil sampling mode, the to-be-sampled soil is not extruded and compressed in the vertical direction, the accuracy of the depth position of the sampled soil is guaranteed, subsequent detection is facilitated, and the sampling efficiency is improved. In addition, the sampling plate can quickly unfold and expose soil on the inner side after sampling, and the soil taking efficiency after sampling is improved.

Description

Technical Field

[0001] The invention relates to the technical field of soil sampling, in particular to a soil sampling device for soil pollution control. Background Art

[0002] Before soil pollution is treated, it is necessary to sample the soil in the designated area and develop a corresponding treatment plan by testing the type and content of pollutants in the soil samples. Commonly used soil sampling devices include sampling tubes and shovels. The sampling tube is a tube with an open end. The opening of the sampling tube has a sharp blade. When it is necessary to sample the soil, the sampling tube is turned upside down on the soil surface. As the sampling tube moves downward, the sampling tube will be inserted into the soil to be sampled. When the sampling tube enters the soil, the soil to be sampled will be surrounded by the inside of the sampling tube to complete the sampling. Then the sampling tube can be pulled out of the soil.

[0003] Since the soil to be sampled is disconnected from the surrounding soil after the sampling tube moves downward, and during the downward movement of the sampling tube, a large friction force is generated between the inner wall of the sampling tube and the soil, thereby driving the soil inside the sampling tube to move downward under the action of the friction force, and the soil inside the sampling tube squeezes each other, so that there is an error between the depth of the soil collected inside the sampling tube and the actual depth in the sampling tube, resulting in poor accuracy of subsequent soil inspection results. In addition, it is difficult to pour the soil out of the sampling tube after sampling is completed, affecting the sampling efficiency. Summary of the invention

[0004] In order to make up for the shortcomings of the prior art, the present invention proposes a soil sampling device for soil pollution control. The present invention folds the sampling device into a plate shape so that the sampling plate can be expanded along the circumferential direction for sampling after entering the soil. Compared with the traditional soil sampling method, the soil to be sampled in the present invention will not be squeezed and compressed in the vertical direction, thereby ensuring the accuracy of the depth position of the sampled soil and facilitating subsequent detection. In addition, the sampling plate in the present invention can quickly expand and expose the inner soil after sampling, thereby improving the soil extraction efficiency after sampling.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a soil sampling device for soil pollution control described in the present invention comprises a sampling plate and a telescopic support fixedly connected to the lower end of the sampling plate; the lower end of the telescopic support is fixedly connected to the cutter; the upper end of the sampling plate is fixedly connected to a tread plate; the tread plate extends toward the inner side of the sampling plate and is movably connected to the sampling rod; the lower position of the sampling rod is fixedly connected to a connecting plate; one of the vertical edges of the sampling plate is provided with a first expansion groove; the first expansion groove is movably connected to the first expansion plate; the edge of the first expansion plate away from the bottom of the first expansion groove is provided with a second expansion groove; the second expansion groove is movably connected to the second expansion plate; the edge of the second expansion plate away from the bottom of the second expansion groove is provided with a third expansion groove; the third expansion plate is movably connected to the third expansion groove; the cross sections of the sampling plate, the first expansion plate, the second expansion plate and the third expansion plate are all arc-shaped, and can be enclosed in a sleeve shape; the upper end of the third expansion plate is fixedly connected to the connecting plate through a connecting rod.

[0006] Preferably, the telescopic support is composed of a main support, a transition support and a sub-support; the upper end of the main support is fixedly connected to the lower end of the sampling plate; the lower end of the main support is fixedly connected to the cutter; there are multiple transition supports; the multiple transition supports are nested with each other and are slidably sealed and connected to each other; a bracket is provided on the inner side of the main support; the outermost transition support is slidably sealed and connected in the bracket; the inner side of the innermost transition support is slidably sealed and connected to the sub-support; a driving groove is provided on the edge of the sampling plate away from the first expansion groove; the driving groove is slidably sealed and connected to the driving plate; the driving plate is connected to the bottom of the driving groove by a first spring; the driving groove and the bracket are connected by a liquid hole, and the inside is filled with a liquid medium; the third expansion plate can enter the driving groove and squeeze the driving plate.

[0007] Preferably, the lower end of the sampling rod passes through the pedal plate and is movably connected to the pedal plate; the lower end of the sampling rod is fixedly connected to the limit plate; a second spring is abutted between the upper surface of the limit plate and the lower surface of the pedal plate; the second spring is sleeved on the outer wall of the sampling rod; the connecting plate is located above the pedal plate; the lower surface of the connecting plate is evenly fixedly connected to the movable protrusion; fixed protrusions are provided at positions corresponding to the upper surface of the pedal plate and the movable protrusion; the contact positions between the fixed protrusion and the movable protrusion are both arc-shaped.

[0008] Preferably, the first unfolding groove wall is provided with a first arc groove; the first arc block is slidably connected in the first arc groove; the first arc block is fixedly connected to the first unfolding plate; the second unfolding groove wall is provided with a second arc groove; the second arc block is slidably connected in the second arc groove; the second arc block is fixedly connected to the second unfolding plate; the third unfolding groove wall is provided with a third arc groove; the third arc block is movably connected in the third arc groove; the third arc groove has a width greater than that of the third arc block; the third arc block is fixedly connected to the third unfolding plate.

[0009] Preferably, the third arc groove is arranged on the vertical groove wall of the third expansion groove; the third expansion groove is fixedly connected to the spring sheet at the upper groove wall and the lower groove wall; the spring sheet is arranged close to the groove opening of the third expansion groove; the third expansion plate is in contact with the spring sheet at both the upper and lower positions.

[0010] Preferably, a slot is provided at the edge of the pedal; the slot passes through the pedal up and down; the connecting rod can enter the slot as the connecting disk rotates; a locking slot is provided on the slot wall facing outward; a T-shaped bar is slidably connected in the locking slot; the head end of the T-shaped bar is located in the slot and a guide surface is provided toward the slot opening; the end of the T-shaped bar is connected to the outer wall of the pedal via a tension spring.

[0011] Preferably, the second deployment groove passes through the first deployment plate; the third deployment groove passes through the second deployment plate; elastic ropes are provided in the first deployment groove, the second deployment groove and the third deployment groove; one end of the elastic rope is fixedly connected to the bottom of the first deployment groove, and the other end is fixedly connected to the third deployment plate.

[0012] Preferably, a notch is provided upwardly through the first expansion slot near the notch opening; the connecting rod can enter the notch for avoidance.

[0013] Preferably, the upper surface of the limiting plate is lower than the upper end of the third unfolding plate in the vertical direction; and the outer edge of the limiting plate is in contact with the inner wall of the sampling plate.

[0014] Preferably, a sealing groove is provided on the outer surface of the limit plate; a sealing bag is fixedly connected in the sealing groove; the sampling rod is movably sealed and connected to the pedal plate; an annular groove is provided on the lower surface of the pedal plate; an annular strip is rotatably sealed and connected in the annular groove; the lower surface of the annular strip is connected to the upper surface of the limit plate through an elastic sleeve; the elastic sleeve is located on the inner side of the second spring; the inner side of the elastic sleeve is connected to the inner side of the sealing bag through an air hole.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention folds the sampling device into a plate shape so that the sampling plate can be expanded along the circumferential direction for sampling after entering the soil. Compared with the traditional soil sampling method, the soil to be sampled in the present invention will not be squeezed and compressed in the vertical direction, thereby ensuring the accuracy of the depth position of the sampled soil and facilitating subsequent detection. In addition, the sampling plate in the present invention can quickly expand and expose the inner soil after sampling, thereby improving the soil extraction efficiency after sampling.

[0016] 2. The present invention controls the third unfolding plate to move up and down during the unfolding process, so that the third unfolding plate can break the soil for sampling more smoothly, thereby improving the smoothness and fluency of soil sampling.

[0017] 3. During the upward movement of the sampling rod of the present invention, the connecting plate and the limit plate will be driven to move upward, the limit plate will squeeze the medium in the elastic sleeve, and the second spring will limit the outward expansion of the elastic sleeve, so that the medium in the elastic sleeve will be pressed into the sealing groove along the air hole, and the sealing bag in the sealing groove will be pushed open, so that the outer edge of the limit plate will contact and seal with the inner side of the sampling plate, the first expansion plate, the second expansion plate, and the third expansion plate. In this way, during the upward movement of the sampling device, the space above the soil on the inner side of the sampling device is sealed, which further prevents the soil from falling as the sampling device is moved out, so that the sampling stability of the sampling device on the soil is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0019] Figure 1 is a stereogram of the present invention; Figure 2 yes Figure 1 The enlarged view of point A in the middle; Figure 3 yes Figure 1 A three-dimensional image from another angle; Figure 4 yes Figure 3 The enlarged view of point B in the middle; Figure 5 yes Figure 3 Enlarged view of point C in the middle; Figure 6 It is a position diagram of the fixed protrusion and the movable protrusion of the present invention; Figure 7 yes Figure 6 The enlarged view of point D in the middle; Figure 8 is a cross-sectional view of the sampling plate, the first unfolding plate, the second unfolding plate and the third unfolding plate in the present invention; Fig. 9 yes Figure 8 Enlarged view of point E in the middle; Fig.10 yes Figure 8 The enlarged view of F in the middle; Fig.11 yes Figure 8 Enlarged view of G in the middle; Fig.12 yes Figure 8 The enlarged view of the H in the middle; Fig.13 is a three-dimensional diagram of the telescopic support in the present invention; Fig.14 It is a three-dimensional diagram of the tread plate and the connecting plate in the present invention; Fig.15 It is a cross-sectional view of the connecting disk and the limiting disk in the present invention.

[0020] In the figure: sampling plate 1, first unfolding groove 11, driving groove 12, driving plate 13, first spring 14, liquid hole 15, first arc groove 16, first arc block 17, notch 18, telescopic support 2, main support 21, transition support 22, auxiliary support 23, bracket 24, cutter 3, stepping plate 4, card slot 41, lock slot 42, T-shaped bar 43, guide surface 44, tension spring 45, annular groove 46, annular bar 47, elastic sleeve 48, air hole 49, sampling rod 5, connecting plate 51, limiting plate 52, second spring 53, movable protrusion 54, fixed protrusion 55, sealing groove 56, sealing capsule 57, first unfolding plate 6, second unfolding groove 61, second arc groove 62, second arc block 63, second unfolding plate 7, third unfolding groove 71, third arc groove 72, third arc block 73, spring piece 74, elastic rope 75, third unfolding plate 8, connecting rod 81. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] like Figures 1 to 15 As shown, the present invention includes the following embodiments: Embodiment 1: A soil sampling device for soil pollution control, comprising a sampling plate 1 and a telescopic support 2 fixedly connected to the lower end of the sampling plate 1; the lower end of the telescopic support 2 is fixedly connected to a cutter 3; the upper end of the sampling plate 1 is fixedly connected to a stepping plate 4; the stepping plate 4 extends toward the inner side of the sampling plate 1 and is movably connected to a sampling rod 5; the lower position of the sampling rod 5 is fixedly connected to a connecting plate 51; one vertical edge of the sampling plate 1 is provided with a first expansion groove 11; the first expansion groove 11 is movably connected to a first expansion plate 6; the first expansion groove 11 is provided with a first expansion plate 6; the first expansion plate 6 ... A second expansion groove 61 is provided at the edge of the opening plate 6 away from the bottom of the first expansion groove 11; the second expansion groove 61 is movably connected to the second expansion plate 7; the second expansion plate 7 is provided with a third expansion groove 71 at the edge away from the bottom of the second expansion groove 61; the third expansion groove 71 is movably connected to the third expansion plate 8; the cross-sections of the sampling plate 1, the first expansion plate 6, the second expansion plate 7 and the third expansion plate 8 are all arc-shaped and can be enclosed in a sleeve shape; the upper end of the third expansion plate 8 is fixedly connected to the connecting plate 51 through a connecting rod 81.

[0023] In this embodiment, the telescopic support 2 is composed of a main support 21, a transition support 22 and a secondary support 23; the upper end of the main support 21 is fixedly connected to the lower end of the sampling plate 1; the lower end of the main support 21 is fixedly connected to the cutter 3; there are multiple transition supports 22; the multiple transition supports 22 are nested with each other and slidably sealed and connected to each other; a bracket 24 is provided on the inner side of the main support 21; the outermost transition support 22 is slidably sealed and connected in the bracket 24; the inner side of the innermost transition support 22 is slidably sealed and connected to the secondary support 23; the edge of the sampling plate 1 away from the first expansion groove 11 is provided with a driving groove 12; the driving groove 12 is slidably sealed and connected to the driving plate 13; the driving plate 13 is connected to the bottom of the driving groove 12 by a first spring 14; the driving groove 12 and the bracket 24 are connected by a liquid hole 15, and the liquid medium is filled inside; the third expansion plate 8 can enter the driving groove 12 and squeeze the driving plate 13.

[0024] During work, after the staff carries the sampling device to the position where sampling is required, they move the sampling plate 1 to the lower end to drive the main support 21 and the cutter 3 against the soil surface, and then step on the pedal 4 to move downward. The pedal 4 will transmit the force to the sampling plate 1, and the sampling plate 1 will drive the main support 21 and the cutter 3 to move downward. The cutter 3 can break the soil. During the process of the sampling plate 1 entering the soil, due to the smaller cross-section and range of the sampling plate 1, the plate-shaped sampling plate 1 is easier to enter the soil than the cylindrical sampling tube, thereby improving the soil sampling efficiency. In addition, during the process of the sampling plate 1 entering the soil to be sampled, the soil to be sampled is in a connected state with other surrounding soil, so the soil to be sampled is difficult to form a vertical direction under the friction generated by the sampling plate 1 entering the soil The soil is squeezed and compressed to ensure that the soil position in the vertical direction of the soil to be sampled is constant. After the sampling plate 1 moves down to a suitable position of the soil, the sampling rod 5 is rotated, and the sampling rod 5 drives the connecting plate 51 to rotate. During the rotation of the connecting plate 51, the connecting rod 81 is driven to rotate. The connecting rod 81 is connected to the third expansion plate 8, so the third expansion plate 8 will move in the circumferential direction, and the third expansion plate 8 will move out of the third expansion groove 71. The third expansion groove 71 is arranged on the second expansion plate 7. The second expansion plate 7 will move out of the second expansion groove 61. The second expansion groove 61 is arranged on the first expansion plate 6. The first expansion plate 6 will move out of the first expansion groove 11. The first expansion groove 11 is arranged on the sampling plate 1. In this way, the third expansion plate 8, the second expansion plate 7 and the second expansion plate 7 are connected. In the process of the first unfolding plate 6 moving along the circumferential direction to form a sleeve shape, the soil to be sampled is separated from the surrounding soil by the third unfolding plate 8, the second unfolding plate 7, the first unfolding plate 6 and the sampling plate 1. The edge of the third unfolding plate 8 away from the third unfolding groove 71 can be sharp to break the soil. With the movement of the third unfolding plate 8, the edge of the third unfolding plate 8 will eventually enter the driving groove 12, so that all plant roots and stems are further cut off. In the process of the edge of the third unfolding plate 8 squeezing into the driving groove 12, the driving plate 13 in the driving groove 12 will be squeezed. The driving plate 13 will slide along the groove wall of the driving groove 12 under pressure and squeeze the liquid medium in the driving groove 12. The liquid medium in the driving groove 12 will enter the bracket 24 along the liquid hole 15. The medium in the bracket 24 The medium in the bracket 24 will enter the inner side of the transition support 22, so that the multiple transition supports 22 will also slide and expand with each other. The multiple transition supports 22 will slide, seal and connect with each other, and will not cause leakage and disconnection. The outermost transition support 22 will slide and move out along the bracket 24. The main support 21, the transition support 22 and the sub-support 23 will not be disconnected from each other and remain sealed. It can be understood as the principle of a hydraulic cylinder. The sub-support 23 and the transition support 22 can enter the inner side of the sampling plate 1 during the expansion process, thereby cutting off and holding the soil to be sampled at the lower position.As the sampling rod 5 continues to rotate, the sampling rod 5 will drive the connecting plate 51 and the connecting rod 81, the third expansion plate 8, the second expansion plate 7, the first expansion plate 6 and the sampling plate 1 to rotate, and the telescopic support 2 will completely cut off the soil as the sampling plate 1 rotates. Finally, the sampling rod 5 is pulled upward. During the upward movement of the sampling rod 5, the connecting plate 51, the connecting rod 81, the third expansion plate 8, the second expansion plate 7, the first expansion plate 6 and the sampling plate 1 will be driven upward. During the upward movement of the sampling plate 1, the expanded telescopic support 2 will be driven to move upward synchronously, so that the soil to be sampled is supported and moved upward by the sampling device and brought out of the soil surface. Then, the sampling rod 5 is rotated in the opposite direction, and the sampling rod 5 will drive the connecting plate 51 and the connecting rod 81 to move, and the connecting rod 81 will bring The third expansion plate 8 is retracted to the third expansion slot 71, the second expansion plate 7 is retracted to the second expansion slot 61, and the first expansion plate 6 is retracted to the first expansion slot 11, so that the third expansion plate 8, the second expansion plate 7, and the first expansion plate 6 are folded up. In the process of the third expansion plate 8 moving out of the driving slot 12, the first spring 14 will push the driving plate 13 to slide and reset in the driving slot 12, and the medium in the bracket 24 will enter the driving slot 12 along the liquid hole 15, so that the telescopic bracket 2 is folded, so that the soil on the inner side of the sampling plate 1 is directly exposed, which is convenient for the staff to take samples later; the number of the third expansion plate 8, the second expansion plate 7, and the first expansion plate 6 in this embodiment can be changed and adjusted according to the use requirements; The present invention folds the sampling device into a plate shape so that the sampling plate 1 can be expanded along the circumferential direction for sampling after entering the soil. Compared with the traditional soil sampling method, the soil to be sampled in the present invention will not be squeezed and compressed in the vertical direction, thereby ensuring the accuracy of the depth position of the sampled soil and facilitating subsequent detection. In addition, the sampling plate 1 in the present invention can quickly expand and expose the inner soil after sampling, thereby improving the soil extraction efficiency after sampling.

[0025] Embodiment 2: The lower end of the sampling rod 5 passes through the pedal plate 4 and is movably connected to the pedal plate 4; the lower end of the sampling rod 5 is fixedly connected to the limit plate 52; a second spring 53 is abutted between the upper surface of the limit plate 52 and the lower surface of the pedal plate 4; the second spring 53 is sleeved on the outer wall of the sampling rod 5; the connecting plate 51 is located above the pedal plate 4; the lower surface of the connecting plate 51 is evenly fixedly connected to the movable protrusion 54; a fixed protrusion 55 is provided at a position corresponding to the movable protrusion 54 on the upper surface of the pedal plate 4; the contact position between the fixed protrusion 55 and the movable protrusion 54 is arc-shaped.

[0026] In this embodiment, the first unfolding groove 11 is provided with a first arc groove 16 on its wall; a first arc block 17 is slidably connected in the first arc groove 16; the first arc block 17 is fixedly connected to the first unfolding plate 6; the second unfolding groove 61 is provided with a second arc groove 62 on its wall; a second arc block 63 is slidably connected in the second arc groove 62; the second arc block 63 is fixedly connected to the second unfolding plate 7; the third unfolding groove 71 is provided with a third arc groove 72 on its wall; a third arc block 73 is movably connected in the third arc groove 72; the third arc groove 72 has a groove width in the vertical direction greater than that of the third arc block 73; the third arc block 73 is fixedly connected to the third unfolding plate 8.

[0027] In this embodiment, the third arc groove 72 is arranged on the vertical groove wall of the third expansion groove 71; the third expansion groove 71 is fixedly connected to the spring piece 74 on the upper groove wall and the lower groove wall; the spring piece 74 is arranged close to the groove opening of the third expansion groove 71; the third expansion plate 8 is in contact with the spring piece 74 at both the upper and lower positions.

[0028] During operation, after the sampling plate 1 is inserted into the soil, rotating the sampling rod 5 will drive the connecting plate 51 and the limiting plate 52 to rotate. The second spring 53 is against between the pedal 4 and the limiting plate 52, so it will not affect the rotation of the limiting plate 52. The connecting plate 51 will drive the movable protrusion 54 to rotate synchronously during rotation. The movable protrusion 54 will contact the fixed protrusion 55 during the activity. The contact position of the fixed protrusion 55 and the movable protrusion 54 is an arc. Therefore, the movable protrusion 54 will squeeze each other in the process of passing through the fixed protrusion 55, thereby squeezing the movable protrusion 54 to move upward. The movable protrusion 54 will drive the connecting plate 51 to move upward during the upward movement. When the connecting plate 51 moves upward, the sampling rod 5 and the limiting plate 52 will be driven upward. When the limiting plate 52 moves upward, the second spring 53 will be squeezed. After the second spring 53 accumulates force, as the movable protrusion 54 passes over the fixed protrusion 55, the second spring 53 will push the limiting plate 52 to move downward. When the limiting plate 52 moves downward, the sampling rod 5 will be driven downward. When the sampling rod 5 moves downward, the connecting plate 51 will be driven downward. When the multiple movable protrusions 54 pass the fixed protrusion 55 in sequence, the connecting plate 51 will move back and forth. In this way, when the sampling rod 5 drives the connecting plate 51 and the connecting rod 81 to move, the connecting plate 51 and the connecting rod 81 are connected. The connecting rod 81 will drive the third deployment plate 8, the second deployment plate 7 and the first deployment plate 6 to deploy, and the connecting rod 81 will move circumferentially and up and down as the connecting plate 51 rotates. The connecting rod 81 will drive the third deployment plate 8 to move circumferentially and up and down at the same time. After the third deployment plate 8 moves up and down at the same time during the circumferential movement, the soil can be better broken, so that the third deployment plate 8 can pass through obstacles such as roots and stems more sharply. During the circumferential and up and down movement of the third deployment plate 8, the third arc block 73 will be driven to move in the third arc groove 72, and the second deployment plate 7 will drive the second arc block 6 The first expansion plate 6 moves in the second arc groove 62, the first expansion plate 6 drives the first arc block 17 to move in the first arc groove 16, and finally the edge of the third expansion plate 8 enters the driving groove 12. The upper and lower positions of the third expansion plate 8 abut against the spring piece 74, so it is difficult for the soil to enter the third expansion groove 71, thereby ensuring the cleanliness of the third expansion groove 71 and ensuring the smooth operation of the third expansion plate 8. In this embodiment, the third expansion plate 8 is controlled to move up and down during the expansion process, so that the third expansion plate 8 can break the soil for sampling more smoothly, thereby improving the smoothness and fluency of soil sampling.

[0029] Embodiment 3: A slot 41 is provided at the edge of the pedal 4; the slot 41 passes through the pedal 4 from top to bottom; the connecting rod 81 can enter the slot 41 as the connecting disk 51 rotates; a locking slot 42 is provided on the slot wall of the slot 41 toward the outside; a T-shaped bar 43 is slidably connected in the locking slot 42; the head end of the T-shaped bar 43 is located in the slot 41 and a guide surface 44 is provided toward the notch direction of the slot 41; the end of the T-shaped bar 43 is connected to the outer wall of the pedal 4 by a tension spring 45.

[0030] In this embodiment, the second unfolding groove 61 passes through the first unfolding plate 6; the third unfolding groove 71 passes through the second unfolding plate 7; an elastic rope 75 is provided in the first unfolding groove 11, the second unfolding groove 61 and the third unfolding groove 71; one end of the elastic rope 75 is fixedly connected to the bottom of the first unfolding groove 11, and the other end is fixedly connected to the third unfolding plate 8.

[0031] During operation, after the sampling plate 1 is inserted into the soil, the sampling rod 5 is rotated to drive the connecting plate 51 and the connecting rod 81 to move, so that the third expansion plate 8, the second expansion plate 7 and the first expansion plate 6 are expanded, and the connecting rod 81 enters the slot 41 and squeezes the head end of the T-shaped bar 43 as the connecting plate 51 rotates. The guide surface 44 at the head end of the T-shaped bar 43 is squeezed by the connecting rod 81 and drives the T-shaped bar 43 to move along the locking groove 42. The connecting rod 81 smoothly passes over the head end of the T-shaped bar 43 and enters the slot 41. The tension spring 45 drives the T-shaped bar 43 to move along the locking groove 42 and reset. The head end of the T-shaped bar 43 enters the slot 41 again to clamp the connecting rod 81, thereby locking the connecting rod 81. Therefore, when the sampling device is used to take out the soil to be sampled, the third expansion plate 8, the second expansion plate 7 and the first expansion plate 6 will not open and collapse by themselves, so that the sampling device is more stable during the sampling process; after the soil to be sampled is taken out, the end of the T-shaped bar 43 is moved to overcome the tension of the tension spring 45, and the head end of the T-shaped bar 43 is moved out of the card slot 41, the elastic rope 75 will pull the third expansion plate 8 to return and collapse, the third expansion plate 8 will move toward the third expansion slot 71, the second expansion plate 7 will move toward the second expansion slot 61, and the first expansion plate 6 will move toward the first expansion slot 11, so that the soil in the sampling device is automatically exposed, further improving the use effect of the sampling device.

[0032] Embodiment 4: A notch 18 is provided upwardly through the first expansion slot 11 near the notch opening; the connecting rod 81 can enter the notch 18 for avoidance.

[0033] During operation, when the third unfolding plate 8 returns to its original position and folds, the connecting rod 81 will enter into the notch 18 as the third unfolding plate 8 returns to its original position, so that the third unfolding plate 8, the second unfolding plate 7 and the first unfolding plate 6 can enter the first unfolding groove 11 for avoidance, thereby reducing the resistance of the sampling plate 1 during the insertion into the soil.

[0034] Embodiment 5: The upper surface of the limiting plate 52 is lower than the upper end of the third unfolding plate 8 in the vertical direction; the outer edge of the limiting plate 52 is in contact with the inner wall of the sampling plate 1.

[0035] In this embodiment, a sealing groove 56 is provided on the outer surface of the limit plate 52; a sealing bag 57 is fixedly connected to the sealing groove 56; the sampling rod 5 is movably and sealedly connected to the pedal plate 4; an annular groove 46 is provided on the lower surface of the pedal plate 4; an annular strip 47 is rotatably and sealably connected to the annular groove 46; the lower surface of the annular strip 47 is connected to the upper surface of the limit plate 52 through an elastic sleeve 48; the elastic sleeve 48 is located on the inner side of the second spring 53; the inner side of the elastic sleeve 48 is connected to the inner side of the sealing bag 57 through the air hole 49.

[0036] During operation, the inner side of the sealing bag 57 and the inner side of the elastic sleeve 48 are filled with liquid medium or gaseous medium. When the first expansion plate 6, the second expansion plate 7 and the third expansion plate 8 are retracted into the sampling plate 1, the sampling rod 5 will drive the pedal plate 4 and the sampling plate 1 to rest against the soil surface. Then, the pedal plate 4 is stepped on to drive the sampling plate 1 to move downward. After the sampling plate 1 is inserted into the soil, the sampling rod 5 is rotated to drive the connecting plate 51 and the connecting rod 81 to move. The connecting rod 81 will drive the first expansion plate 6, the second expansion plate 7 and the third expansion plate 8 to expand. During the rotation of the sampling rod 5, the limiting plate 52 and the connecting plate 51 will be driven to rotate. During the rotation of the limiting plate 52, the elastic sleeve 48 will be driven to rotate. During the rotation of the elastic sleeve 48, the annular strip 47 will be driven to rotate in the annular groove 46. When the third expansion plate 8 enters the driving After the groove 12 is moved, the sampling of the soil to be sampled is completed, and then the sampling rod 5 is controlled to move upward. During the upward movement of the sampling rod 5, the connecting plate 51 and the limiting plate 52 will be driven to move upward. The limiting plate 52 will squeeze the medium in the elastic sleeve 48, and the second spring 53 will limit the outward expansion of the elastic sleeve 48, so that the medium in the elastic sleeve 48 will be pressurized to enter the sealing groove 56 along the air hole 49, and the sealing bag 57 in the sealing groove 56 will be pushed open, so that the outer edge of the limiting plate 52 is in contact and sealed with the inner side of the sampling plate 1, the first expansion plate 6, the second expansion plate 7, and the third expansion plate 8. In this way, during the upward movement of the sampling device, the space above the soil inside the sampling device is sealed, which further prevents the soil from falling during the removal of the sampling device, so that the sampling stability of the sampling device for soil is further improved.

[0037] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1The orientation or positional relationship shown 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, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A soil sampling device for soil pollution control, characterized in that: The invention comprises a sampling plate (1) and a telescopic support (2) fixedly connected to the lower end of the sampling plate (1); the lower end of the telescopic support (2) is fixedly connected to a cutter (3); the upper end of the sampling plate (1) is fixedly connected to a stepping plate (4); the stepping plate (4) extends toward the inner side of the sampling plate (1) and is movably connected to a sampling rod (5); the lower position of the sampling rod (5) is fixedly connected to a connecting plate (51); one vertical edge of the sampling plate (1) is provided with a first expansion groove (11); the first expansion groove (11) is movably connected to a first expansion plate (6); the first expansion plate (6) is away from the first expansion groove (11) A second expansion groove (61) is provided at the edge of the groove bottom; a second expansion plate (7) is movably connected inside the second expansion groove (61); a third expansion groove (71) is provided at the edge of the second expansion plate (7) away from the groove bottom of the second expansion groove (61); a third expansion plate (8) is movably connected inside the third expansion groove (71); the cross sections of the sampling plate (1), the first expansion plate (6), the second expansion plate (7) and the third expansion plate (8) are all arc-shaped and can be enclosed in a sleeve shape; the upper end of the third expansion plate (8) is fixedly connected to the connecting plate (51) through a connecting rod (81).

2. A soil sampling device for soil pollution control according to claim 1, characterized in that: The telescopic support (2) is composed of a main support (21), a transition support (22) and a secondary support (23); the upper end of the main support (21) is fixedly connected to the lower end of the sampling plate (1); the lower end of the main support (21) is fixedly connected to the cutter (3); there are a plurality of transition supports (22); the plurality of transition supports (22) are mutually nested and slidably sealed and connected to each other; a bracket groove (24) is provided on the inner side of the main support (21); the outermost transition support (22) is slidably sealed and connected in the bracket groove (24); the innermost transition support (22) The inner sliding seal is connected to the auxiliary support (23); the edge of the sampling plate (1) away from the first expansion groove (11) is provided with a driving groove (12); the driving groove (12) is connected to the driving plate (13) by a sliding seal; the driving plate (13) and the bottom of the driving groove (12) are connected by a first spring (14); the driving groove (12) and the support groove (24) are connected by a liquid hole (15), and the inside is filled with a liquid medium; the third expansion plate (8) can enter the driving groove (12) and squeeze the driving plate (13).

3. A soil sampling device for soil pollution control according to claim 1, characterized in that: The lower end of the sampling rod (5) passes through the pedal plate (4) and is movably connected to the pedal plate (4); the lower end of the sampling rod (5) is fixedly connected to the limit plate (52); a second spring (53) is abutted between the upper surface of the limit plate (52) and the lower surface of the pedal plate (4); the second spring (53) is sleeved on the outer wall of the sampling rod (5); the connecting plate (51) is located above the pedal plate (4); the lower surface of the connecting plate (51) is evenly fixedly connected to the movable protrusion (54); a fixed protrusion (55) is arranged at a position corresponding to the movable protrusion (54) on the upper surface of the pedal plate (4); the contact position between the fixed protrusion (55) and the movable protrusion (54) is arc-shaped.

4. A soil sampling device for soil pollution control according to claim 3, characterized in that: The first expansion slot (11) is provided with a first arc groove (16) on its wall; a first arc block (17) is slidably connected to the first expansion slot (16); the first arc block (17) is fixedly connected to the first expansion plate (6); the second expansion slot (61) is provided with a second arc groove (62) on its wall; a second arc block (63) is slidably connected to the second expansion slot (62); the second arc block (63) is fixedly connected to the second expansion plate (7); the third expansion slot (71) is provided with a third arc groove (72) on its wall; a third arc block (73) is movably connected to the third arc groove (72); the third arc groove (72) has a width greater than that of the third arc block (73); the third arc block (73) is fixedly connected to the third expansion plate (8).

5. A soil sampling device for soil pollution control according to claim 4, characterized in that: The third arc-shaped groove (72) is arranged on the vertical groove wall of the third expansion groove (71); the third expansion groove (71) is fixedly connected to the spring sheet (74) at the upper groove wall and the lower groove wall; the spring sheet (74) is arranged close to the groove opening of the third expansion groove (71); the third expansion plate (8) is in contact with the spring sheet (74) at both the upper position and the lower position.

6. A soil sampling device for soil pollution control according to claim 1, characterized in that: The edge of the pedal plate (4) is provided with a slot (41); the slot (41) passes through the pedal plate (4) from top to bottom; the connecting rod (81) can enter the slot (41) as the connecting plate (51) rotates; a locking slot (42) is provided on the slot wall of the slot (41) facing outward; a T-shaped bar (43) is slidably connected in the locking slot (42); the head end of the T-shaped bar (43) is located in the slot (41) and is provided with a guide surface (44) facing the notch of the slot (41); the end of the T-shaped bar (43) is connected to the outer wall of the pedal plate (4) via a tension spring (45).

7. A soil sampling device for soil pollution control according to claim 6, characterized in that: The second unfolding groove (61) passes through the first unfolding plate (6); the third unfolding groove (71) passes through the second unfolding plate (7); elastic ropes (75) are provided in the first unfolding groove (11), the second unfolding groove (61) and the third unfolding groove (71); one end of the elastic rope (75) is fixedly connected to the bottom of the first unfolding groove (11), and the other end is fixedly connected to the third unfolding plate (8).

8. The soil sampling device for soil pollution control according to claim 1, characterized in that: A notch (18) is provided upwardly through the first expansion slot (11) at a position close to the notch opening; the connecting rod (81) can enter the notch (18) for avoidance.

9. A soil sampling device for soil pollution control according to claim 3, characterized in that: The upper surface of the limiting plate (52) is lower than the upper end of the third unfolding plate (8) in the vertical direction; the outer edge of the limiting plate (52) is in contact with the inner wall of the sampling plate (1).

10. A soil sampling device for soil pollution control according to claim 9, characterized in that: The outer surface of the limiting plate (52) is provided with a sealing groove (56); a sealing bag (57) is fixedly connected to the sealing groove (56); the sampling rod (5) is movably sealed and connected to the pedal plate (4); an annular groove (46) is provided on the lower surface of the pedal plate (4); an annular strip (47) is rotatably sealed and connected to the annular groove (46); the lower surface of the annular strip (47) and the upper surface of the limiting plate (52) are connected via an elastic sleeve (48); the elastic sleeve (48) is located on the inner side of the second spring (53); the inner side of the elastic sleeve (48) and the inner side of the sealing bag (57) are connected via an air hole (49).

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