Sampling device and sampling method for detecting landfill leachate

Abstract

The invention relates to the technical field of sampling equipment, and discloses a sampling device and a sampling method for landfill leachate detection, and the sampling device comprises a sampling pipe, a breather pipe, a bag type sponge assembly, a piston assembly, a tubular liquid extraction assembly and a suction liquid collection assembly; the breather pipe is inserted into the sampling pipe, the bag type sponge assembly is arranged in the sampling pipe and connected with the breather pipe, the breather pipe is used for driving the bag type sponge assembly to move, the piston assembly is inserted into the breather pipe, and when the piston assembly moves downwards, gas is guided into the bag type sponge assembly; the bag type sponge assembly comprises an air bag sponge piece and two symmetrically-installed elastic rods. According to the device, the sampling pipe is inserted, the bag type sponge assembly is used for expanding and supporting garbage, percolate seepage and absorption are accelerated, then the percolate is collected through the suction liquid collection assembly, the problem that the percolate on the upper portion of a garbage pile is inconvenient to sample is effectively solved, the sampling efficiency is improved, and it is ensured that samples can comprehensively reflect the distribution characteristics of the percolate in the garbage pile.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling equipment, and in particular to a sampling device and a sampling method for detecting landfill leachate. Background Art

[0002] Landfill leachate refers to the high-concentration organic wastewater formed by the water contained in the landfill itself, as well as the infiltration of precipitation, surface water and groundwater through the landfill layer during the stacking and landfill processes of the landfill. Its composition is complex, containing various organic matters, heavy metals, inorganic salts, pathogens and other pollutants, and it is a highly polluting liquid. After the leachate infiltrates into the soil, it will change the chemical properties of the soil, affect the fertility and ecological functions of the soil, and even cause soil pollution. Therefore, detecting landfill leachate is an important link in landfill treatment and environmental protection, which can timely understand the pollution status of the leachate and provide a scientific basis for subsequent treatment and control. When detecting the leachate, it is necessary to insert a sampling tube into the landfill to sample the leachate;

[0003] In the actual process of sampling landfill leachate, sampling is usually carried out for the upper, middle and lower parts of the landfill respectively to ensure that the samples can comprehensively reflect the distribution characteristics and pollution status of the leachate inside the landfill, so as to improve the accuracy and representativeness of the detection results. However, it is found in the operation that there are vertical differences in the distribution of landfill leachate inside the landfill. In the area near the bottom of the landfill, due to the action of gravity and the compaction and degradation processes of the landfill, the accumulation amount of leachate is relatively large, and sampling is relatively easy and sufficient samples can be obtained relatively quickly. In the area near the upper part of the landfill, the content of leachate is less, and it often takes a long time to wait during sampling, which is inconvenient to sample the leachate in the upper part of the landfill and affects the sampling efficiency.

[0004] To solve the above problems, a sampling device and a sampling method for detecting landfill leachate are proposed in the present application. Summary of the Invention

[0005] The present invention provides a sampling device and a sampling method for detecting landfill leachate, which solve the problem that in the related art, in the area near the upper part of the landfill, the content of leachate is less, and it often takes a long time to wait during sampling, which is inconvenient to sample the leachate in the upper part of the landfill and affects the sampling efficiency.

[0006] A sampling device for detecting landfill leachate provided by the present invention includes a sampling tube, an air vent pipe, a sac-type sponge assembly, a piston assembly, a tube-type liquid pumping assembly and a suction liquid collection assembly;

[0007] The vent pipe is inserted into the sampling pipe. The bladder sponge assembly is arranged in the sampling pipe and connected to the vent pipe. The vent pipe is used to drive the bladder sponge assembly to move. The piston assembly is inserted into the vent pipe. When the piston assembly moves downward, gas is conducted into the bladder sponge assembly.

[0008] The bladder sponge assembly includes an airbag sponge part and two symmetrically installed elastic rods. The airbag sponge part is located between the two elastic rods. A tubular liquid extraction component is installed on the bladder sponge assembly. The tubular liquid extraction component includes a plurality of liquid extraction pipes distributed along the outer periphery of the airbag sponge part. The suction liquid collection component is connected to the tubular liquid extraction component.

[0009] As a further optimized solution of the present invention, the bladder sponge assembly further includes an upper shaft and a lower shaft. The airbag sponge part is arranged between the upper shaft and the lower shaft. The upper shaft is connected to the bottom end of the vent pipe. A fixed shaft is installed in the lower shaft. The two ends of the airbag sponge part are respectively connected to the fixed shaft and the upper shaft. The vent pipe is communicated with the airbag sponge part. The two elastic rods are symmetrically installed between the upper shaft and the lower shaft. A liquid discharge hole is opened at the bottom of the lower shaft, and a sealing plug is sealed in the liquid discharge hole.

[0010] As a further optimized solution of the present invention, the airbag sponge part includes an airbag body. The airbag body is arranged between the upper shaft and the lower shaft, and the two ends of the airbag body are respectively connected to the fixed shaft and the upper shaft. The two elastic rods are respectively located on both sides of the airbag body. The vent pipe is communicated with the airbag body. Two arc-shaped rubber layers are symmetrically installed on the airbag body, and sponge bodies are connected to the outer peripheries of the two arc-shaped rubber layers.

[0011] As a further optimized solution of the present invention, the tubular liquid extraction component further includes an annular pipe and a second hose. The annular pipe is installed at the top of the upper shaft. The second hose is vertically arranged in the sampling pipe. The bottom end of the second hose is communicated with the annular pipe. The top end of the second hose is communicated with the suction liquid collection component. A plurality of liquid extraction pipes are respectively inserted into the two sponge bodies. The top ends of the plurality of liquid extraction pipes are all connected with a first hose, and the first hose is communicated with the annular pipe. A number of vertically arranged liquid extraction holes are opened on the liquid extraction pipe, and a filter screen is arranged in the liquid extraction holes.

[0012] As a further optimized solution of the present invention, the suction liquid collection component includes a suction hose, a suction pump, a liquid guide pipe and a sampling cylinder. One end of the suction hose passes through the outer periphery of the top end of the sampling pipe and is communicated with the top end of the second hose. The suction pump is connected to the other end of the suction hose. One end of the liquid guide pipe is connected to the liquid discharge end of the suction pump. The sampling cylinder is connected to the other end of the liquid guide pipe. A liquid discharge pipe is connected to the bottom end of the sampling cylinder.

[0013] As a further optimization scheme of the present invention, the piston assembly includes a piston body and a handle rod, the piston body is slidably arranged in the ventilation pipe, the handle rod slides through the top end of the ventilation pipe and is connected to the piston body, a handle plate is installed on the top end of the handle rod, a handle ring is fixed on the top end of the ventilation pipe, an air hole is opened on the top end of the ventilation pipe, and a second locking shaft sleeved on the handle rod is also installed on the top end of the ventilation pipe, and the outer periphery of the second locking shaft is threadedly connected to a second bolt that is pressed tightly against the handle rod.

[0014] As a further optimization solution of the present invention, an air supply component is arranged in the ventilation pipe, and the air supply component is used to guide the gas into the airbag body.

[0015] As a further optimization scheme of the present invention, the air supply assembly includes an air supply pipe, an air guide hose and an air pump. The air supply pipe is vertically arranged in the ventilation pipe, the piston body is slidably sleeved on the air supply pipe, the top end of the air supply pipe passes through the top end of the ventilation pipe, one end of the air guide hose is connected to the top end of the air supply pipe, and the air pump is connected to the other end of the air guide hose.

[0016] As a further optimization solution of the present invention, a first locking shaft sleeved on the ventilation pipe is installed on the top of the sampling tube, and the outer periphery of the first locking shaft is threadedly connected to a first bolt pressed against the ventilation pipe.

[0017] A method for sampling landfill leachate detection, using the above-mentioned sampling device for landfill leachate detection, comprises the following steps:

[0018] Step 1: insert the sampling tube into the upper part of the garbage pile, then pull it upwards a part to reserve space for the bladder sponge assembly, and then push the bladder sponge assembly downwards to the reserved space through the ventilation tube, so that the bladder sponge assembly is placed in the garbage;

[0019] Step 2: Push the piston assembly downward in the vent pipe to guide the gas into the airbag sponge. The airbag sponge will then expand and support the garbage around it. After the garbage is supported, it is squeezed and the leachate is filtered out of the garbage. The leachate is absorbed by the sponge.

[0020] Step 3: The ventilation pipe is driven downward again to apply pressure to the elastic rod between the upper shaft and the lower shaft. The elastic rod bends under pressure, further applying squeezing force to the garbage around it, and the leachate in the garbage further seeps out, increasing the amount of leachate absorbed by the sponge;

[0021] Step 4: Start the suction and liquid collection component to generate negative pressure in the tubular liquid collection component, suck the leachate absorbed in the sponge body through the liquid extraction tube, and then guide it to the suction and liquid collection component for collection;

[0022] Step Five: Pull the ventilation pipe to move the bladder sponge assembly into the sampling pipe, then pull out the sampling pipe from the garbage heap, and then collect the leachate remaining on the sponge body and the leachate collected in the suction liquid collection assembly together.

[0023] The above technical solution of the present invention has the following beneficial technical effects:

[0024] 1. First, the sampling pipe of the present invention is inserted into the upper part of the garbage heap, then pulled up a part to reserve space for the bladder sponge assembly. Subsequently, the bladder sponge assembly is pushed downward through the ventilation pipe to the reserved space, and the piston assembly is pushed downward in the ventilation pipe to conduct the gas into the airbag sponge part. The airbag sponge part then expands and props up the surrounding garbage. After the garbage is propped up, under the action of the extrusion force, the leachate filters out from the garbage, and the airbag sponge part absorbs the leachate, solving the problems of less leachate content and inconvenient sampling in the upper part of the garbage heap, improving the sampling efficiency, ensuring that the leachate in the upper area of the garbage heap can be effectively collected, and enabling the sample to more comprehensively reflect the distribution characteristics of the leachate inside the garbage heap;

[0025] 2. In order to further accelerate the seepage rate of the leachate, the present invention drives the ventilation pipe to move downward again to apply pressure to the bladder sponge assembly. The two elastic rods on the bladder sponge assembly bend after being stressed and further apply an extrusion force to the surrounding garbage, and the leachate in the garbage further seeps out, increasing the amount of leachate absorbed by the airbag sponge part and further improving the sampling efficiency and shortening the time required for sampling;

[0026] 3. Through the provided suction liquid collection assembly, a negative pressure is generated in the tubular liquid extraction assembly, and the leachate absorbed in the airbag sponge part is sucked through the liquid extraction pipe and then conducted into the suction liquid collection assembly for collection. Since multiple liquid extraction pipes are distributed along the outer periphery of the airbag sponge part, the speed of the leachate around it converging to the airbag sponge part can be accelerated, enabling the leachate to be collected more quickly;

[0027] 4. Through the provided air supply assembly, gas can be supplied into the airbag sponge part to strengthen the gas pressure inside the airbag sponge part, further strengthening the force of propping up the garbage, so that the garbage is subjected to a greater extrusion force, prompting the leachate to seep out of the garbage faster, further improving the seepage rate of the leachate and the sampling efficiency, ensuring that the leachate in the upper area of the garbage heap can be collected more quickly and effectively, and improving the representativeness of the sample and the accuracy of the detection result. Description of the Drawings

[0028] Figure 1 It is a schematic diagram of the overall structure of a sampling device for detecting garbage leachate proposed by the present invention.

[0029] Figure 2 It is an internal sectional view of the sampling pipe of the present invention.

[0030] Figure 3 This is an internal cross-sectional view of the sampling tube and the ventilation tube of the present invention.

[0031] Figure 4 For the present invention Figure 3 Front view of the whole.

[0032] Figure 5 This is a schematic diagram of the downward movement structure of the capsule sponge assembly of the present invention.

[0033] Figure 6 This is a schematic diagram of the structure of the piston assembly of the present invention.

[0034] Figure 7 This is a schematic diagram of the structure of the capsule sponge assembly of the present invention.

[0035] Figure 8 This is a schematic diagram of the structure of the airbag sponge part of the present invention.

[0036] Figure 9 This is a schematic diagram of the structure of the tube-type liquid extraction assembly of the present invention.

[0037] Figure 10 For the present invention Figure 9 Enlarged view of A in

[0038] Reference numerals: 1, sampling tube; 101, first locking shaft; 102, first bolt; 2, ventilation tube; 21, handle ring; 22, air hole; 23, second locking shaft; 24, second bolt; 3, capsule sponge assembly; 31, airbag sponge part; 311, airbag body; 312, arc-shaped rubber layer; 313, sponge body; 32, upper shaft; 33, lower shaft; 34, elastic rod; 35, fixed shaft; 36, liquid discharge hole; 37, sealing plug; 4, piston assembly; 41, piston body; 42, handle rod; 43, handle plate; 5, tube-type liquid extraction assembly; 51, liquid extraction tube; 511, first hose; 512, liquid extraction hole; 513, filter screen; 52, annular tube; 53, second hose; 6, suction liquid collection assembly; 61, suction hose; 62, suction pump; 63, liquid guide tube; 64, sampling cylinder; 65, liquid discharge tube; 7, air supply assembly; 71, air supply tube; 72, air guide hose; 73, air pump. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the specific implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following descriptions, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0040] Example 1

[0041] AsFigures 1 - 10 As shown in the figure, a sampling device for detecting landfill leachate proposed by the present invention includes a sampling tube 1, an air vent tube 2, a bladder sponge assembly 3, a piston assembly 4, a tubular liquid extraction assembly 5 and a suction liquid collection assembly 6;

[0042] The air vent tube 2 is inserted into the sampling tube 1. The bladder sponge assembly 3 is arranged in the sampling tube 1 and connected to the air vent tube 2, and the air vent tube 2 is used to drive the bladder sponge assembly 3 to move. The piston assembly 4 is inserted into the air vent tube 2. When the piston assembly 4 moves downward, the gas is guided into the bladder sponge assembly 3.

[0043] The bladder sponge assembly 3 includes an air bladder sponge member 31 and two symmetrically installed elastic rods 34. The air bladder sponge member 31 is located between the two elastic rods 34. A tubular liquid extraction assembly 5 is installed on the bladder sponge assembly 3. The tubular liquid extraction assembly 5 includes a plurality of liquid extraction tubes 51 distributed along the outer periphery of the air bladder sponge member 31. The suction liquid collection assembly 6 is connected to the tubular liquid extraction assembly 5.

[0044] During use, first insert the sampling tube 1 into the garbage pile, then pull it up a part to reserve space for the bladder sponge assembly 3. Subsequently, push the bladder sponge assembly 3 downward through the air vent tube 2 to the reserved space, so that the bladder sponge assembly 3 is placed in the garbage. When the piston assembly 4 is pushed downward in the air vent tube 2, the gas is pressed into the air bladder sponge member 31 in the bladder sponge assembly 3, causing the air bladder sponge member 31 to expand. After the air bladder sponge member 31 expands, it will generate a propping force on the surrounding garbage, prompting the leachate in the garbage to ooze out. At the same time, for the tubular liquid extraction assembly 5 installed on the bladder sponge assembly 3, its liquid extraction tubes 51 are distributed along the outer periphery of the air bladder sponge member 31, and can quickly collect the oozing leachate. The collected leachate is collected through the suction liquid collection assembly 6 connected to the tubular liquid extraction assembly 5. Such a design enables the expansion and position of the air bladder sponge member 31 to be controlled by the piston assembly 4 and the air vent tube 2 during the sampling process, realizing the effective collection of landfill leachate.

[0045] As Figure 2 shown in Figure 7 the figure, in this embodiment, the bladder sponge assembly 3 further includes an upper shaft 32 and a lower shaft 33. The air bladder sponge member 31 is arranged between the upper shaft 32 and the lower shaft 33. The upper shaft 32 is connected to the bottom end of the air vent tube 2. A fixed shaft 35 is installed in the lower shaft 33. The two ends of the air bladder sponge member 31 are respectively connected to the fixed shaft 35 and the upper shaft 32. The air vent tube 2 is communicated with the air bladder sponge member 31. The two elastic rods 34 are symmetrically installed between the upper shaft 32 and the lower shaft 33. A drain hole 36 is opened at the bottom of the lower shaft 33, and a sealing plug 37 is sealed in the drain hole 36.

[0046] When the ventilation tube 2 moves, it drives the upper shaft 32 to move, and then drives the entire bladder sponge assembly 3 to move. The gas in the ventilation tube 2 enters the airbag sponge part 31, causing the airbag sponge part 31 to expand. At this time, the upper shaft 32 and the lower shaft 33 will be stretched a certain distance due to the expansion of the airbag sponge part 31, and the two elastic rods 34 are stretched. When the ventilation tube 2 moves downward again, pressure is applied to the elastic rods 34, and the elastic rods 34 are compressed and bent, further squeezing the surrounding garbage and causing more leachate to seep out. The drainage hole 36 at the bottom of the lower shaft 33 is sealed by the sealing plug 37 during normal sampling to prevent leachate leakage. When cleaning or special operations are required, the sealing plug 37 can be opened for drainage.

[0047] like Figure 2 , Figure 7 and Figure 8 As shown, in this embodiment, the airbag sponge member 31 includes an airbag body 311, which is arranged between the upper shaft 32 and the lower shaft 33, and the two ends of the airbag body 311 are respectively connected to the fixed shaft 35 and the upper shaft 32, two elastic rods 34 are respectively located on both sides of the airbag body 311, the ventilation tube 2 is connected to the airbag body 311, and two arc-shaped rubber layers 312 are symmetrically installed on the airbag body 311, and the outer peripheries of the two arc-shaped rubber layers 312 are connected to the sponge body 313.

[0048] The ventilation tube 2 transports gas to the airbag 311, and the airbag 311 expands, pushing the arc-shaped rubber layer 312 and the sponge 313 connected thereto to expand outward. The arc-shaped rubber layer 312 can protect the airbag 311 and at the same time enhance the supporting effect on the surrounding garbage. The sponge 313 is used to absorb the seeping leachate. Because it is in direct contact with the garbage, it can quickly absorb the leachate. The elastic rods 34 on both sides play a role when the airbag 311 expands and the ventilation tube 2 moves downward, further squeezing the garbage and promoting the seepage of the leachate. Such a structural design makes the airbag sponge part 31 more targeted when collecting leachate, can better adapt to the complex environment of the garbage dump, and improve the sampling quality.

[0049] like Figure 3 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, in this embodiment, the tubular liquid extraction component 5 also includes an annular tube 52 and a second hose 53. The annular tube 52 is installed on the top of the upper shaft 32, and the second hose 53 is vertically arranged in the sampling tube 1. The bottom end of the second hose 53 is connected to the annular tube 52, and the top end of the second hose 53 is connected to the suction and liquid collection component 6. A plurality of liquid extraction tubes 51 are respectively inserted in the two sponges 313, and the top ends of the plurality of liquid extraction tubes 51 are connected to the first hose 511, and the first hose 511 is connected to the annular tube 52. A plurality of vertically arranged liquid extraction holes 512 are opened on the liquid extraction tube 51, and a filter screen 513 is arranged in the liquid extraction hole 512.

[0050] After the liquid suction and collection assembly 6 is started, a negative pressure will be generated in the second hose 53, and then a negative pressure will be formed in the annular pipe 52 and the first hose 511 connected thereto. For the liquid extraction pipe 51 inserted into the sponge body 313, its liquid extraction holes 512 will suck in the leachate absorbed by the sponge body 313 under the action of the negative pressure. The filter screen 513 can filter out garbage residues to ensure the purity of the collected leachate. The leachate passes through the liquid extraction pipe 51, the first hose 511, the annular pipe 52 and the second hose 53 in sequence, and is finally collected by the liquid suction and collection assembly 6. This design ensures the high efficiency and purity of the leachate collection, and ensures the accuracy of the subsequent test results.

[0051] As Figure 1 shown in Figure 3 In this embodiment, the liquid suction and collection assembly 6 includes a suction hose 61, a suction pump 62, a liquid guide pipe 63 and a sampling cylinder 64. One end of the suction hose 61 passes through the outer periphery of the top end of the sampling pipe 1 and is communicated with the top end of the second hose 53. The suction pump 62 is connected to the other end of the suction hose 61. One end of the liquid guide pipe 63 is connected to the liquid discharge end of the suction pump 62. The sampling cylinder 64 is connected to the other end of the liquid guide pipe 63. A liquid discharge pipe 65 is connected to the bottom end of the sampling cylinder 64.

[0052] After the suction pump 62 is started, a strong suction force is generated in the suction hose 61, thereby forming a negative pressure in the second hose 53 communicated therewith. This negative pressure enables the tubular liquid extraction assembly 5 to suck the leachate in the sponge body 313. The leachate enters the suction pump 62 through the second hose 53 and the suction hose 61. After the suction pump 62 pressurizes the leachate, it is transported to the sampling cylinder 64 through the liquid guide pipe 63 for collection. The liquid discharge pipe 65 at the bottom of the sampling cylinder 64 can be opened for discharge when the leachate needs to be discharged, which is convenient for subsequent treatment and detection of the collected leachate. The design of the liquid suction and collection assembly 6 ensures the collection and storage of the leachate, providing convenience for the subsequent detection work.

[0053] As Figure 2 , Figure 3 , Figure 4 , Figure 5 shown in Figure 6 In this embodiment, the piston assembly 4 includes a piston body 41 and a handle rod 42. The piston body 41 is slidably arranged in the air vent pipe 2. The handle rod 42 slidably passes through the top end of the air vent pipe 2 and is connected to the piston body 41. A handle plate 43 is installed at the top end of the handle rod 42. A handle ring 21 is fixed at the top end of the air vent pipe 2. An air hole 22 is opened at the top end of the air vent pipe 2. A second locking shaft 23 sleeved on the handle rod 42 is also installed at the top end of the air vent pipe 2. A second bolt 24 that presses against the handle rod 42 is threadedly connected to the outer periphery of the second locking shaft 23.

[0054] During operation, hold the handle disc 43 and push the handle rod 42 downward. The handle rod 42 drives the piston body 41 to move downward in the ventilation pipe 2. During the downward movement of the piston body 41, the gas in the ventilation pipe 2 is squeezed into the airbag body 311, causing the airbag body 311 to expand. The handle ring 21 facilitates the operator to hold the ventilation pipe 2 for easy operation. The air hole 22 is used to balance the air pressure in the ventilation pipe 2 to prevent operation difficulties caused by air pressure differences. After the piston body 41 moves to a suitable position, the second locking shaft 23 and the second bolt 24 can fix the handle rod 42 by tightening the second bolt 24 to ensure that the airbag body 311 maintains an expanded state and stably collects leachate.

[0055] As Figure 1 shown in Figure 6 In this embodiment, as shown, a first locking shaft 101 sleeved on the ventilation pipe 2 is installed at the top of the sampling pipe 1, and a first bolt 102 that presses against the ventilation pipe 2 is threadedly connected to the outer circumference of the first locking shaft 101.

[0056] When the ventilation pipe 2 moves to a suitable position in the sampling pipe 1 and the bladder sponge assembly 3 is adjusted to a specific sampling position in the garbage dump, the first bolt 102 can be tightened to press against the ventilation pipe 2 and fix the ventilation pipe 2 on the sampling pipe 1. This can ensure that the ventilation pipe 2 does not move randomly during the sampling process, ensuring that the bladder sponge assembly 3 stably collects leachate and improving the accuracy and stability of sampling.

[0057] Embodiment Two

[0058] On the basis of Embodiment One, the present invention further has a structure for further enhancing the internal gas pressure of the airbag body 311 to maintain the top support force of the airbag body 311 on the garbage, specifically as follows:

[0059] As Figure 1 shown in Figure 3 and Figure 6 In this embodiment, as shown, an air supply assembly 7 is arranged in the ventilation pipe 2, and the air supply assembly 7 is used to conduct gas into the airbag body 311; the air supply assembly 7 includes an air supply pipe 71, a gas guide hose 72 and an air pump 73. The air supply pipe 71 is vertically arranged in the ventilation pipe 2, the piston body 41 is slidably sleeved on the air supply pipe 71, the top end of the air supply pipe 71 passes through the top end of the ventilation pipe 2, one end of the gas guide hose 72 is communicated with the top end of the air supply pipe 71, and the air pump 73 is connected to the other end of the gas guide hose 72.

[0060] After the air pump 73 is started, the generated gas enters the air supply pipe 71 through the air guide hose 72. The air supply pipe 71 conveys the gas to the airbag body 311. Since the piston body 41 is slidably sleeved on the air supply pipe 71, it will not affect the normal air supply of the air supply pipe 71. While the piston assembly 4 presses down to supply air, the air supply assembly 7 continuously supplies air, causing the air pressure in the airbag body 311 to continuously increase, more powerfully propping up the surrounding garbage and accelerating the seepage rate of the leachate. This design enhances the sampling ability of the sampling device through two air supply paths, ensuring efficient collection of leachate in different environments.

[0061] Embodiment Three

[0062] Based on the above embodiments, a sampling method for detecting landfill leachate uses the above-mentioned sampling device for detecting landfill leachate, and includes the following steps:

[0063] Step 1: Insert the sampling tube 1 into the upper part of the garbage heap, then pull it up a part to reserve space for the capsule sponge assembly 3. Subsequently, push the capsule sponge assembly 3 downward through the air vent pipe 2 to the reserved space, so that the capsule sponge assembly 3 is placed in the garbage.

[0064] Step 2: Push the piston assembly 4 downward in the air vent pipe 2 to conduct the gas to the airbag sponge 31. The airbag sponge 31 immediately expands, propping up the surrounding garbage. After the garbage is propped up, under the action of the extrusion force, the leachate filters out from the garbage and is absorbed by the sponge body 313.

[0065] Step 3: Drive the air vent pipe 2 downward again to apply pressure to the elastic rod 34 between the upper shaft 32 and the lower shaft 33. After the elastic rod 34 is pressed, it bends, further applying an extrusion force to the surrounding garbage, and the leachate in the garbage further oozes out, increasing the amount of leachate absorbed by the sponge body 313.

[0066] Step 4: Start the suction liquid collection assembly 6 to generate negative pressure in the tubular liquid extraction assembly 5, suck the leachate absorbed by the sponge body 313 through the liquid extraction pipe 51, and then conduct it to the suction liquid collection assembly 6 for collection.

[0067] Step 5: Pull the air vent pipe 2 to move the capsule sponge assembly 3 into the sampling tube 1. Subsequently, pull out the sampling tube 1 from the garbage heap, and then collect the leachate remaining on the sponge body 313 and the leachate collected in the suction liquid collection assembly 6 together.

[0068] The specific working principle of the present invention is as follows:

[0069] When using this sampling device, first insert the sampling tube 1 into the upper part of the garbage heap, then pull it up a part to reserve space for the bladder sponge assembly 3. Next, hold the handle ring 21 and push the air pipe 2 to drive the bladder sponge assembly 3 to move downward to the reserved space, so that the bladder sponge assembly 3 is placed in the garbage. Then, fix the air pipe 2 with the first bolt 102. At this time, hold the handle plate 43 and push the lever 42 to make the piston body 41 move downward in the air pipe 2, press the gas in the air pipe 2 into the air bladder 311. The air bladder 311 expands, driving the arc-shaped rubber layer 312 and the sponge body 313 to expand outward, propping up the surrounding garbage, making the leachate in the garbage seep out, and the sponge body 313 absorbs the leachate;

[0070] If it is necessary to further increase the amount of leachate seepage, unlock the first bolt 102 on the air pipe 2, and then push the air pipe 2 to move downward again to apply pressure to the elastic lever 34. The elastic lever 34 is bent under pressure, further squeezing the surrounding garbage to make more leachate seep out. At the same time, the air supply assembly 7 can start the air pump 73 to supply gas to the air bladder 311 through the air guide hose 72 and the air supply pipe 71, strengthening the propping force of the air bladder 311 on the garbage and accelerating the leachate seepage;

[0071] When collecting the leachate, start the suction pump 62 to generate negative pressure in the suction hose 61 and the second hose 53, so that the liquid extraction pipe 51 inserted into the sponge body 313 absorbs the leachate absorbed by the sponge body 313 through the liquid extraction holes 512. The leachate passes through the first hose 511, the annular pipe 52, the second hose 53, and the suction hose 61 in sequence, enters the suction pump 62, and is then transported to the sampling cylinder 64 for collection through the liquid guide pipe 63;

[0072] After sampling is completed, pull the air pipe 2 to move the bladder sponge assembly 3 into the sampling tube 1, and then pull out the sampling tube 1 from the garbage heap. At this time, the leachate remaining on the sponge body 313 can be collected together with the leachate collected in the sampling cylinder 64 for subsequent detection. During the whole sampling process, the first locking shaft 101 and the first bolt 102 can fix the position of the air pipe 2 in the sampling tube 1, and the second locking shaft 23 and the second bolt 24 can fix the position of the piston assembly 4 to ensure the stable and accurate progress of the sampling operation.

[0073] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modification examples falling within the scope and boundary of the appended claims, or equivalent forms of such scope and boundary.

Claims

1. A sampling device for detecting landfill leachate, characterized in that, It includes a sampling tube (1), a ventilation tube (2), a bladder sponge assembly (3), a piston assembly (4), a tubular liquid extraction assembly (5) and a suction liquid collection assembly (6); The ventilation tube (2) is inserted into the sampling tube (1). The bladder sponge assembly (3) is arranged in the sampling tube (1) and connected to the ventilation tube (2). The ventilation tube (2) is used to drive the bladder sponge assembly (3) to move. The piston assembly (4) is inserted into the ventilation tube (2). When the piston assembly (4) moves downward, gas is conducted into the bladder sponge assembly (3); The bladder sponge assembly (3) includes an air bladder sponge part (31) and two symmetrically installed elastic rods (34). The air bladder sponge part (31) is located between the two elastic rods (34). A tubular liquid extraction assembly (5) is installed on the bladder sponge assembly (3). The tubular liquid extraction assembly (5) includes a plurality of liquid extraction tubes (51) distributed along the outer periphery of the air bladder sponge part (31). The suction liquid collection assembly (6) is connected to the tubular liquid extraction assembly (5).

2. The sampling device for detecting landfill leachate according to claim 1, characterized in that, The bladder sponge assembly (3) further includes an upper shaft (32) and a lower shaft (33). The air bladder sponge part (31) is arranged between the upper shaft (32) and the lower shaft (33). The upper shaft (32) is connected to the bottom end of the ventilation tube (2). A fixed shaft (35) is installed in the lower shaft (33). The two ends of the air bladder sponge part (31) are respectively connected to the fixed shaft (35) and the upper shaft (32). The ventilation tube (2) is communicated with the air bladder sponge part (31). The two elastic rods (34) are symmetrically installed between the upper shaft (32) and the lower shaft (33). A liquid discharge hole (36) is opened at the bottom of the lower shaft (33), and a sealing plug (37) is sealed in the liquid discharge hole (36).

3. The sampling device for detecting landfill leachate according to claim 2, wherein The air bladder sponge part (31) includes an air bladder body (311). The air bladder body (311) is arranged between the upper shaft (32) and the lower shaft (33), and the two ends of the air bladder body (311) are respectively connected to the fixed shaft (35) and the upper shaft (32). The two elastic rods (34) are respectively located on both sides of the air bladder body (311). The ventilation tube (2) is communicated with the air bladder body (311). Two arc-shaped rubber layers (312) are symmetrically installed on the air bladder body (311), and sponge bodies (313) are connected to the outer peripheries of the two arc-shaped rubber layers (312).

4. The sampling device for detecting landfill leachate according to claim 3, characterized in that, The tubular liquid extraction assembly (5) further includes an annular tube (52) and a second hose (53). The annular tube (52) is installed at the top of the upper shaft (32). The second hose (53) is vertically arranged in the sampling tube (1). The bottom end of the second hose (53) is communicated with the annular tube (52). The top end of the second hose (53) is communicated with the suction liquid collection assembly (6). The plurality of liquid extraction tubes (51) are respectively inserted into the two sponge bodies (313). The top ends of the plurality of liquid extraction tubes (51) are all connected with a first hose (511), and the first hose (511) is communicated with the annular tube (52). A plurality of vertically arranged liquid extraction holes (512) are opened on the liquid extraction tubes (51), and filter meshes (513) are arranged in the liquid extraction holes (512).

5. A sampling device for detecting landfill leachate according to claim 4, wherein, The suction liquid collection assembly (6) includes a suction hose (61), a suction pump (62), a liquid guide pipe (63) and a sampling cylinder (64). One end of the suction hose (61) passes through the outer periphery of the top end of the sampling pipe (1) and is communicated with the top end of the second hose (53). The suction pump (62) is connected to the other end of the suction hose (61). One end of the liquid guide pipe (63) is connected to the liquid discharge end of the suction pump (62). The sampling cylinder (64) is connected to the other end of the liquid guide pipe (63). A liquid discharge pipe (65) is connected to the bottom end of the sampling cylinder (64).

6. A sampling device for detecting landfill leachate according to claim 5, characterized in that, The piston assembly (4) includes a piston body (41) and a handle rod (42). The piston body (41) is slidably arranged in the air vent pipe (2). The handle rod (42) slidably passes through the top end of the air vent pipe (2) and is connected to the piston body (41). A handle plate (43) is installed at the top end of the handle rod (42). A handle ring (21) is fixed to the top end of the air vent pipe (2). An air hole (22) is formed in the top end of the air vent pipe (2). A second locking shaft (23) sleeved on the handle rod (42) is further installed at the top end of the air vent pipe (2). A second bolt (24) that presses against the handle rod (42) is threadedly connected to the outer periphery of the second locking shaft (23).

7. The sampling device for detecting landfill leachate according to claim 6, characterized in that, An air supply assembly (7) is arranged in the air vent pipe (2), and the air supply assembly (7) is used for guiding gas into the air bag body (311).

8. A sampling device for detecting landfill leachate according to claim 7, characterized in that, The air supply assembly (7) includes an air supply pipe (71), a gas guide hose (72) and an air pump (73). The air supply pipe (71) is vertically arranged in the air vent pipe (2). The piston body (41) is slidably sleeved on the air supply pipe (71). The top end of the air supply pipe (71) passes through the top end of the air vent pipe (2). One end of the gas guide hose (72) is communicated with the top end of the air supply pipe (71). The air pump (73) is connected to the other end of the gas guide hose (72).

9. The sampling device for detecting landfill leachate according to claim 8, characterized in that, A first locking shaft (101) sleeved on the air vent pipe (2) is installed at the top of the sampling pipe (1). A first bolt (102) that presses against the air vent pipe (2) is threadedly connected to the outer periphery of the first locking shaft (101).

10. A sampling method for detecting landfill leachate, using a sampling device for detecting landfill leachate as described in any one of claims 1-9, characterized in that, It includes the following steps: Step 1: Insert the sampling pipe (1) into the upper part of the garbage heap, then pull it up a part to reserve space for the capsule sponge assembly (3). Subsequently, push the capsule sponge assembly (3) downward through the air vent pipe (2) to the reserved space, so that the capsule sponge assembly (3) is placed in the garbage; Step 2: Push the piston assembly (4) to move downward in the air vent pipe (2) to guide gas into the air bag sponge part (31). The air bag sponge part (31) then expands to support the surrounding garbage. After the garbage is supported, under the action of the extrusion force, the leachate filters out from the garbage and is absorbed by the sponge body (313); Step 3: Drive the air vent pipe (2) to move downward again to apply pressure to the elastic rod (34) between the upper shaft (32) and the lower shaft (33). After the elastic rod (34) is pressed, it bends to further apply an extrusion force to the surrounding garbage, and the leachate in the garbage further oozes out, increasing the amount of leachate absorbed by the sponge body (313); Step 4: Start the suction liquid collection assembly (6) to generate negative pressure in the tubular liquid extraction assembly (5), suck the leachate absorbed in the sponge body (313) through the liquid extraction pipe (51), and then send it to the suction liquid collection assembly (6) for collection; Step 5: Pull the ventilation pipe (2) to move the capsule sponge assembly (3) into the sampling pipe (1), then pull out the sampling pipe (1) from the garbage dump, and then collect the leachate remaining on the sponge body (313) and the leachate collected in the suction liquid collection assembly (6).

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