Sampling device and method for stale refuse in landfill

Abstract

The invention relates to a landfill stale garbage sampling device and method, and relates to the technical field of garbage treatment.The landfill stale garbage sampling device comprises a mounting frame and a hanging rod movably penetrating through the mounting frame, a drill bit assembly is inserted into the bottom end of the hanging rod, and at least one mounting cylinder is arranged between the drill bit assembly and the hanging rod in a sleeving mode; the mounting cylinder comprises a cylinder body and a cover plate fixed at the top of the cylinder body, a plurality of sampling units which are uniformly distributed along the circumference are arranged in the cylinder body, and a rotating plate for driving the sampling units to rotate is arranged below the sampling units; an insertion rod for sleeving the mounting cylinder is fixedly arranged at the top of the drill bit assembly, and an electric push rod for pushing the sampling unit to move in the radial direction of the insertion rod and a screw rod module for driving the electric push rod to move in the axial direction of the insertion rod are arranged in the insertion rod. According to the sampling device, stale garbage samples in the inner walls of drill holes with different depths can be dug at a time, the sampling efficiency is greatly improved, meanwhile, automatic splicing of the suspenders can be achieved, and the automation level of the whole sampling device is high.

Description

Technical Field

[0001] The invention belongs to the technical field of garbage disposal, and in particular relates to a device and method for sampling stale garbage in a landfill. Background Art

[0002] Sampling of stale garbage in landfills refers to collecting representative garbage samples from long-term landfilled garbage piles according to certain methods and standards for subsequent analysis, research and treatment. Sample information is crucial for environmental monitoring, pollution control, garbage disposal and resource recovery. Its main purposes include: understanding the types, composition, degradation degree and pollution status of garbage in landfills; providing scientific basis for landfill management, garbage resource utilization and environmental risk assessment; monitoring landfill operation results to ensure that landfill activities meet environmental protection requirements.

[0003] The sampling depth of stale garbage in landfills usually depends on multiple factors, including the age of the garbage, the management requirements of the landfill, and the purpose of sampling. The sampling depth ranges from a few meters to tens of meters. However, the existing sampling devices can only effectively sample surface garbage and it is difficult to go deep into the deeper layers, resulting in the inability to obtain representative samples of all layers. When sampling at deeper levels, problems such as equipment operation difficulties and insufficient length of sampling tools may occur. In addition, the drill rods of existing sampling devices are difficult to automatically splice, and the equipment requires manual intervention during the splicing process, which increases the complexity of the operation and the workload, and also affects the work efficiency. In addition, the human body is in a stale garbage landfill, which is prone to adverse effects on health.

[0004] To this end, we provide a landfill stale garbage sampling device and method to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a landfill stale garbage sampling device and method in view of the problems of the background technology.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A landfill stale garbage sampling device comprises a mounting frame and a suspension rod movably penetrating the mounting frame, a drill assembly is inserted at the bottom end of the suspension rod, at least one mounting cylinder is sleeved between the drill assembly and the suspension rod, the mounting cylinder comprises a cylinder body and a cover plate fixed on the top of the cylinder body, a plurality of sampling units evenly distributed along the circumference are arranged inside the cylinder body, and a rotating plate for driving the sampling unit to rotate is arranged below the sampling unit;

[0008] A plug rod for sleeve mounting the mounting tube is fixedly provided on the top of the drill assembly, and an electric push rod for pushing the sampling unit to move radially along the plug rod and a screw module for driving the electric push rod to move axially along the plug rod are provided inside the plug rod;

[0009] A lifting mechanism for driving the suspension rod to move is arranged on the side of the suspension rod, and the lifting mechanism is fixed on the mounting frame.

[0010] As a further optimization scheme of the present invention, the drill bit assembly includes a first motor and a drill bit body fixed on the output shaft of the first motor; the insertion rod is fixed on the top of the first motor and movably inserted into the suspension rod, and a top screw knob for locking the insertion rod is embedded on the surface of the suspension rod.

[0011] As a further optimization scheme of the present invention, a second motor for driving the rotation of the rotating plate is provided under the rotating plate, and a plurality of through holes evenly distributed along the circumference are provided on the rotating plate. A sliding rod is fixed in the through hole, and a slider is slidably provided on the sliding rod. A first spring is sleeved on the sliding rod between the slider and the end of the through hole.

[0012] As a further optimization scheme of the present invention, the sampling unit includes two bearing seats respectively fixed on the top of their respective sliders; a mounting plate is rotatably provided between the two bearing seats, a disc is rotatably provided on the top of the mounting plate, a sampling cylinder is detachably mounted on the disc, and a third motor for driving the disc to rotate is provided at the bottom of the mounting plate; a torsion spring and a first gear are respectively sleeved on the rotating shaft of the mounting plate, and a first rack meshing with the first gear is provided below the first gear to achieve angle adjustment of the sampling cylinder.

[0013] As a further optimization solution of the present invention, a sampling hole for the sampling cylinder to pass through is provided on the surface of the mounting cylinder, and a rotatable hole cover is provided at the sampling hole.

[0014] As a further optimization scheme of the present invention, the suspension rod includes a plurality of rod body units spliced ​​end to end, and both ends of the rod body units are provided with notch grooves, a clamping column is provided in the notch groove at one end, and a clamping groove matching the clamping column is provided in the notch groove at the other end; a second rack is embedded on the surface of the rod body unit.

[0015] As a further optimization solution of the present invention, the lifting mechanism includes a fourth motor and a second gear fixedly mounted on an output shaft of the fourth motor; the second gear is meshed with a second rack.

[0016] As a further optimization scheme of the present invention, multiple rod body units are evenly placed on the mounting frame along the circumference; the mounting frame is provided with a toggle frame for separating the rod body units and driving the rod body units to rotate to achieve mutual splicing, and a fifth motor is provided below the toggle frame for driving it to rotate.

[0017] As a further optimization scheme of the present invention, a positioning groove is also provided on the surface of the rod body unit, and a positioning unit is also fixedly provided on the mounting frame and cooperates with the positioning groove to control the operation of the fifth motor; the positioning unit includes a fixed seat and a movable rod movably passing through the fixed seat, and a roller seat abutting the surface of the rod body unit is fixedly provided on the end of the movable rod, a second spring is sleeved on the movable rod between the roller seat and the fixed seat, a first conductive block is fixedly provided on the side of the roller seat, and a second conductive block matching the first conductive block is provided on the side of the first conductive block.

[0018] A method for sampling stale garbage in a landfill comprises the following steps:

[0019] S1. Based on the actual sampling requirements, put the required number of installation tubes between the drill assembly and the suspension rod;

[0020] S2, the boom is driven down through the lifting mechanism, and the stale garbage is cut and crushed through the drill assembly, so that the boom can be smoothly lowered to the garbage layer at different depths;

[0021] S3, driving the electric push rod to descend to the height position of the installation tube to be sampled through the screw module;

[0022] S4. The sampling unit is driven to rotate to the sampling position through the rotating plate, and the sampling unit is pushed to move radially through the electric push rod. During the radial movement of the sampling unit, it is automatically converted from a vertical state to a horizontal state, and then the stale garbage sample in the inner wall of the borehole is dug.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention can realize one-time excavation of stale garbage samples from the inner wall of boreholes of different depths by arranging an insertion rod, a mounting tube and a plurality of sampling units, thereby greatly improving the sampling efficiency. The actual number of mounting tubes can be installed according to actual sampling requirements, and the installation and disassembly of the mounting tubes is also relatively convenient.

[0025] 2. The present invention provides a first gear, a first rack and a torsion spring, which can automatically complete the adjustment of the angle of the sampling tube and the opening of the hole cover at the sampling hole during the pushing process of the electric push rod, thereby simplifying the sampling steps. After the sampling is completed, the sampling tube can be reset to a vertical state to avoid the falling of stale garbage samples and leachate.

[0026] 3. The present invention can realize automatic splicing of the suspension rod by setting a lifting mechanism and a toggle frame, thereby improving the automation level of the entire sampling device and accelerating the sampling efficiency. The setting of the positioning unit can ensure the accuracy of the splicing operation of the rod unit and reduce the cost of automated control of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the connection structure of the suspension rod, the drill bit assembly and the installation tube of the present invention;

[0029] Figure 3 It is a schematic diagram of the internal structure of the installation tube of the present invention;

[0030] Figure 4 It is a schematic diagram of the sampling unit structure of the present invention;

[0031] Figure 5 It is a schematic diagram of the rotating plate structure of the present invention;

[0032] Figure 6 It is a schematic diagram of the internal structure of the through hole of the rotating plate of the present invention;

[0033] Figure 7 It is a schematic diagram of the installation tube structure of the present invention;

[0034] Figure 8 It is a schematic diagram of the structure of the mounting frame of the present invention;

[0035] Fig. 9 It is a schematic diagram of the positioning unit structure of the present invention.

[0036] In the figure:

[0037] 1. Suspension rod; 101. Rod unit; 102. Top screw knob; 103. Notch groove; 104. Clamping column; 105. Second rack; 106. Positioning groove; 2. Drill assembly; 201. First motor; 202. Drill body; 203. Insertion rod; 204. Screw rod module; 205. Electric push rod; 3. Mounting cylinder; 301. Cylinder; 301a. Sampling hole; 301b. Hole cover; 302. Cover plate; 303. Rotating plate; 303a. Second motor; 303b. Through hole; 303c. Sliding rod; 303d. Sliding block; 303e. First spring; 30 4. Sampling unit; 304a. Bearing seat; 304b. Mounting plate; 304c. Disc; 304d. Sampling tube; 304e. Third motor; 304f. Torsion spring; 304g. First gear; 304h. First rack; 4. Lifting mechanism; 401. Second gear; 402. Fourth motor; 5. Mounting frame; 501. Positioning unit; 501a. Fixed seat; 501b. Movable rod; 501c. Roller seat; 501d. Second spring; 501e. First conductive block; 501f. Second conductive block; 502. Toggle frame; 503. Fifth motor. DETAILED DESCRIPTION

[0038] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0039] Embodiment 1

[0040] In order to solve the problem that the existing sampling device is difficult to dig out the stale garbage samples from the inner wall of the borehole at different depths at one time, and the sampling efficiency is not ideal, please refer to Figure 1 , Figure 3 The present invention provides a landfill stale garbage sampling device, comprising a mounting frame 5 and a suspension rod 1 movably penetrating the mounting frame 5, a drill assembly 2 is inserted at the bottom end of the suspension rod 1, at least one mounting cylinder 3 is sleeved between the drill assembly 2 and the suspension rod 1, the mounting cylinder 3 comprises a cylinder body 301 and a cover plate 302 fixed on the top of the cylinder body 301, a plurality of sampling units 304 evenly distributed along the circumference are arranged inside the cylinder body 301, and a rotating plate 303 for driving the sampling units 304 to rotate is arranged below the sampling units 304. The stale garbage samples in the inner wall of the boreholes of different depths can be dug at one time through a plurality of sampling units 304, which greatly improves the sampling efficiency.

[0041] like Figure 2 As shown, an insertion rod 203 for sleeve mounting tube 3 is fixedly provided on the top of the drill assembly 2, and an electric push rod 205 for pushing the sampling unit 304 to move radially along the insertion rod 203 and a screw module 204 for driving the electric push rod 205 to move axially along the insertion rod 203 are provided inside the insertion rod 203. When sampling, the electric push rod 205 is driven by the screw module 204 to move to the side of the mounting tube 3 for sampling, and then the sampling unit 304 is driven by the electric push rod 205 to move toward the inner wall of the borehole to dig out the stale garbage sample in the inner wall.

[0042] The drill assembly 2 includes a first motor 201 and a drill body 202 fixed on the output shaft of the first motor 201; the plunger 203 is fixed on the top of the first motor 201 and movably inserted into the suspension rod 1, and a screw knob 102 for locking the plunger 203 is embedded on the surface of the suspension rod 1. The length of the plunger 203 between the first motor 201 and the suspension rod 1 is determined based on the number of mounting tubes 3. According to the actual sampling requirements, the required number of mounting tubes 3 are installed. Specifically, the screw knob 102 is loosened, the plunger 203 is pulled out of the suspension rod 1, the mounting tube 3 is installed on the plunger 203, and then the plunger 203 is reinserted into the suspension rod 1 and the screw knob 102 is locked.

[0043] like Figure 4-Figure 6As shown, a second motor 303a is provided below the rotating plate 303 for driving the rotating plate 303 to rotate, a plurality of through holes 303b are provided on the rotating plate 303 evenly distributed along the circumference, a sliding rod 303c is fixedly provided in the through hole 303b, a sliding block 303d is slidably provided on the sliding rod 303c, and a first spring 303e is sleeved on the sliding rod 303c between the sliding block 303d and the end of the through hole 303b; the sampling unit 304 includes two bearing seats 304a respectively fixed on the top of each sliding block 303d; the two bearing seats A mounting plate 304b is rotatably provided between 304a, a disc 304c is rotatably provided on the top of the mounting plate 304b, a sampling tube 304d is detachably mounted on the disc 304c, a third motor 304e for driving the disc 304c to rotate is provided at the bottom of the mounting plate 304b; a torsion spring 304f and a first gear 304g are respectively sleeved on the rotating shaft of the mounting plate 304b, a first rack 304h meshing with the first gear 304g is provided below the first gear 304g to achieve angle adjustment of the sampling tube 304d.

[0044] like Figure 7 As shown, a sampling hole 301a for the sampling tube 304d to pass through is provided on the surface of the mounting tube 3, a rotatable hole cover 301b is provided at the sampling hole 301a, and a torsion spring 304f for resetting is also provided on the rotating shaft of the hole cover 301b.

[0045] During sampling, the electric push rod 205 drives the bearing seat 304a to move, and the bearing seat 304a drives the slider 303d to move along the slide bar 303c. At this time, the first spring 303e is compressed, and the bearing seat 304a drives the mounting plate 304b to move, and the mounting plate 304b drives the first gear 304g to move. Under the action of the first rack 304h, the first gear 304g rotates, thereby driving the mounting plate 304b and the sampling cylinder 304d thereon to rotate. During the rotation process, the sampling cylinder 304d opens the hole cover 301b , then the sampling tube 304d passes through the sampling hole 301a, and the third motor 304e is started. The third motor 304e drives the disc 304c to rotate, and the disc 304c drives the sampling tube 304d to rotate. The end of the sampling tube 304d is provided with a serrated portion, and the stale garbage sample is dug into the sampling tube 304d; after the sampling is completed, the electric push rod 205 is reset, and under the reset force of the first spring 303e, the sampling tube 304d is retracted into the mounting tube 3 and reset to a vertical state to avoid the falling of the stale garbage sample and the leachate.

[0046] Embodiment 2

[0047] On the basis of the first embodiment, in order to solve the problem that the existing sampling device can only perform surface sampling on the stale garbage in the landfill, as shown in FIG. Figure 1 , Figure 8As shown, a lifting mechanism 4 for driving the suspension rod 1 to move is provided on the side thereof, and the lifting mechanism 4 is fixed on a mounting frame 5 .

[0048] The suspension rod 1 includes a plurality of rod body units 101 connected end to end, with notched grooves 103 provided at both ends of the rod body units 101, a clamping column 104 provided in the notched groove 103 at one end, and a clamping groove matching the clamping column 104 provided in the notched groove 103 at the other end; a second rack 105 is embedded on the surface of the rod body unit 101; the lifting mechanism 4 includes a fourth motor 402 and a second gear 401 fixedly mounted on the output shaft of the fourth motor 402; the second gear 401 is meshed with the second rack 105.

[0049] When in use, the fourth motor 402 drives the second gear 401 to rotate, the second gear 401 drives the second rack 105 to move, the second rack 105 drives the rod unit 101 to move, and the boom 1 drives the drill bit assembly 2 and the mounting tube 3 to move, thereby enabling deep sampling of stale garbage in the landfill.

[0050] Embodiment 3

[0051] On the basis of the first and second embodiments, in order to realize the automatic splicing of the boom 1, improve the automation level of the entire sampling device, and speed up the sampling efficiency, as shown in FIG. Figure 8-Figure 9 As shown, a plurality of rod units 101 are evenly placed on the mounting frame 5 along the circumference; the mounting frame 5 is provided with a toggle frame 502 for separating the rod units 101 and driving the rod units 101 to rotate to achieve mutual splicing, and a fifth motor 503 for driving the toggle frame 502 to rotate is provided below the toggle frame 502. The toggle frame 502 is driven to rotate by the fifth motor 503, and the toggle frame 502 drives the rod units 101 to rotate, and the clamping column 104 at one end of the rod unit 101 is clamped into the clamping groove of another rod unit 101, thereby completing the automatic splicing of the suspension rod 1, effectively improving the automation level of the sampling device, avoiding the problem of slow manual splicing efficiency, and the human body being in a stale garbage landfill, which is easy to have adverse effects on health.

[0052] In order to ensure the accuracy of the splicing operation of the rod unit 101 and reduce the cost of the automatic control of the device, a positioning groove 106 is further provided on the surface of the rod unit 101, and a positioning unit 501 is fixedly provided on the mounting frame 5 to cooperate with the positioning groove 106 to control the operation of the fifth motor 503. When the positioning unit 501 is inserted into the positioning groove 106, the circuit of the fifth motor 503 is connected and starts to rotate. When the positioning unit 501 leaves the positioning groove 106, the circuit of the fifth motor 503 is disconnected and stops. Stop rotation; the positioning unit 501 includes a fixed seat 501a and a movable rod 501b that movably passes through the fixed seat 501a, the end of the movable rod 501b is fixedly provided with a roller seat 501c that abuts against the surface of the rod body unit 101, and a second spring 501d is sleeved on the movable rod 501b between the roller seat 501c and the fixed seat 501a, and a first conductive block 501e is fixedly provided on the side of the roller seat 501c, and a second conductive block 501f matching it is provided on the side of the first conductive block 501e. During the descent of the rod unit 101, the roller seat 501c is driven to rotate. At this time, the second spring 501d is in a compressed state. When the positioning slot 106 descends to the roller seat 501c, the roller seat 501c is inserted into the positioning slot 106 driven by the second spring 501d. The roller seat 501c drives the first conductive block 501e to move toward the second conductive block 501f. When the second conductive block 501f contacts the first conductive block 501e, the circuit of the fifth motor 503 is connected and starts to rotate. As the rod unit 101 continues to descend, the roller seat 501c is squeezed and leaves the positioning slot 106. At this time, the first conductive block 501e and the second conductive block 501f are separated, and the circuit of the fifth motor 503 is disconnected. The positioning unit 501 is used to control the on and off of the circuit of the fifth motor 503 to ensure the accuracy of the splicing operation of the rod unit 101 and effectively reduce the cost of automatic control of the device.

[0053] The present invention also provides a method for sampling stale garbage in a landfill, comprising the following steps:

[0054] S1. Based on the actual sampling requirements, a required number of mounting tubes 3 are placed between the drill assembly 2 and the suspension rod 1;

[0055] S2, the lifting mechanism 4 drives the boom 1 to descend, and the drill assembly 2 cuts and crushes the stale garbage, so that the boom 1 can smoothly descend to the garbage layers at different depths;

[0056] S3, driving the electric push rod 205 to descend to the height position of the installation tube 3 to be sampled through the screw module 204;

[0057] S4. The sampling unit 304 is driven to rotate to the sampling position through the rotating plate 303, and the sampling unit 304 is pushed to move radially through the electric push rod 205. During the radial movement of the sampling unit 304, it is automatically converted from a vertical state to a horizontal state, and then the stale garbage sample in the inner wall of the borehole is dug.

[0058] The above-mentioned embodiment only expresses one implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A landfill stale garbage sampling device, comprising a mounting frame (5) and a suspension rod (1) movably penetrating the mounting frame (5), characterized in that: A drill assembly (2) is inserted at the bottom end of the suspension rod (1), at least one mounting tube (3) is sleeved between the drill assembly (2) and the suspension rod (1), the mounting tube (3) comprises a tube body (301) and a cover plate (302) fixed on the top of the tube body (301), a plurality of sampling units (304) evenly distributed along the circumference are arranged inside the tube body (301), and a rotating plate (303) for driving the sampling unit (304) to rotate is arranged below the sampling unit (304); A plug rod (203) for sleeve-mounting the mounting tube (3) is fixedly provided on the top of the drill assembly (2), and an electric push rod (205) for pushing the sampling unit (304) to move radially along the plug rod (203) and a screw module (204) for driving the electric push rod (205) to move axially along the plug rod (203) are provided inside the plug rod (203); A lifting mechanism (4) for driving the suspension rod (1) to move is provided on the side thereof, and the lifting mechanism (4) is fixed on a mounting frame (5).

2. A landfill stale garbage sampling device according to claim 1, characterized in that: The drill bit assembly (2) comprises a first motor (201) and a drill bit body (202) fixed on the output shaft of the first motor (201); The insertion rod (203) is fixed on the top of the first motor (201) and movably inserted into the suspension rod (1); a top screw knob (102) for locking the insertion rod (203) is embedded on the surface of the suspension rod (1).

3. A landfill stale garbage sampling device according to claim 1, characterized in that: A second motor (303a) is provided below the rotating plate (303) for driving the rotating plate (303) to rotate. The rotating plate (303) is provided with a plurality of through holes (303b) evenly distributed along the circumference. A sliding rod (303c) is fixedly provided in the through hole (303b). A sliding block (303d) is slidably provided on the sliding rod (303c). A first spring (303e) is sleeved on the sliding rod (303c) between the sliding block (303d) and the end of the through hole (303b).

4. A landfill stale garbage sampling device according to claim 3, characterized in that: The sampling unit (304) comprises two bearing seats (304a) respectively fixed on the top of the respective sliders (303d); A mounting plate (304b) is rotatably provided between the two bearing seats (304a), a disc (304c) is rotatably provided on the top of the mounting plate (304b), a sampling cartridge (304d) is detachably mounted on the disc (304c), and a third motor (304e) for driving the disc (304c) to rotate is provided at the bottom of the mounting plate (304b); A torsion spring (304f) and a first gear (304g) are respectively sleeved on the rotating shaft of the mounting plate (304b), and a first rack (304h) meshing with the first gear (304g) is provided below the first gear (304g) to achieve angle adjustment of the sampling tube (304d).

5. A landfill stale garbage sampling device according to claim 1, characterized in that: A sampling hole (301a) for the sampling cylinder (304d) to pass through is provided on the surface of the installation cylinder (3), and a rotatable hole cover (301b) is provided at the sampling hole (301a).

6. A landfill stale garbage sampling device according to claim 1, characterized in that: The suspension rod (1) comprises a plurality of rod units (101) connected end to end, each end of the rod unit (101) is provided with a notch groove (103), a clamping column (104) is provided in the notch groove (103) at one end, and a clamping groove matching the clamping column (104) is provided in the notch groove (103) at the other end; A second rack (105) is embedded on the surface of the rod unit (101).

7. A landfill stale garbage sampling device according to claim 6, characterized in that: The lifting mechanism (4) comprises a fourth motor (402) and a second gear (401) fixedly sleeved on the output shaft of the fourth motor (402); The second gear (401) is meshed with the second rack (105).

8. A landfill stale garbage sampling device according to claim 6, characterized in that: A plurality of the rod units (101) are evenly placed on the mounting frame (5) along the circumference; The mounting frame (5) is provided with a shifting frame (502) for separating the rod body units (101) and driving the rod body units (101) to rotate so as to achieve mutual splicing, and a fifth motor (503) for driving the shifting frame (502) to rotate is provided below the shifting frame (502).

9. A landfill stale garbage sampling device according to claim 8, characterized in that: A positioning groove (106) is also provided on the surface of the rod body unit (101), and a positioning unit (501) is also fixedly provided on the mounting frame (5) and cooperates with the positioning groove (106) to control the operation of the fifth motor (503); The positioning unit (501) comprises a fixed seat (501a) and a movable rod (501b) movably penetrating the fixed seat (501a); a roller seat (501c) abutting against the surface of the rod body unit (101) is fixedly provided at the end of the movable rod (501b); a second spring (501d) is sleeved on the movable rod (501b) between the roller seat (501c) and the fixed seat (501a); a first conductive block (501e) is fixedly provided on the side of the roller seat (501c); and a second conductive block (501f) matching the first conductive block (501e) is provided on the side of the first conductive block (501e).

10. A method for sampling stale garbage in a landfill, using a stale garbage sampling device for a landfill according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Based on actual sampling requirements, a required number of mounting tubes (3) are placed between the drill assembly (2) and the suspension rod (1); S2, driving the boom (1) to descend through the lifting mechanism (4), cutting and crushing the stale garbage through the drill assembly (2), so that the boom (1) can smoothly descend to the garbage layers at different depths; S3, driving the electric push rod (205) to descend to the height position of the installation tube (3) to be sampled through the screw module (204); S4. The sampling unit (304) is driven to rotate to the sampling position by the rotating plate (303), and the sampling unit (304) is pushed to move radially by the electric push rod (205). During the radial movement of the sampling unit (304), the vertical state is automatically converted to the horizontal state, and then the stale garbage sample in the inner wall of the borehole is dug.

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