Portable earth gas separating and trapping device

Abstract

The invention relates to the technical field of geogas collection and separation, and discloses a portable geogas separation trapping device which comprises a hammering pile provided with a cavity, a sampling pipe is inserted into the hammering pile, and the hammering pile sequentially comprises an upper pile body, a sampling pile body and a lower pile body from top to bottom. The upper end of the sampling pile is slidably connected with the lower end of the upper pile body in the vertical direction, the bottom end of the sampling pile is matched with the lower pile body in an inserted mode, the upper pile body and the lower pile body are fixedly connected through a connecting rod, lifting equipment is installed at the top end of the upper pile body and used for adjusting the height of the sampling pipe, and a separation layer is fixed to the lower side wall of the sampling pipe. Without additional steel chisel punching and sampler connection operation, the hammering pile can be directly hammered into the soil layer to complete layout, the step of pulling out the steel chisel is omitted, the problem of hole collapse during pulling out of the steel chisel and the situation that atmosphere is mixed into holes are effectively avoided, and it is ensured that collected earth gas is not interfered by external air; and the accuracy and reliability of a sampling result are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of ground gas collection and separation technology, specifically a portable ground gas separation and collection device. Background Technology

[0002] Geochemical gas-ground measurement is a mineral exploration method that reveals deep mineral-bearing information by capturing and measuring trace metallic and non-metallic elements in underground rising gas streams. Its main mechanism is that when rising gas streams in the Earth's crust move vertically through mineral-bearing geological bodies, they bring ultrafine active (submicron to nanometer scale) portions of ore-forming elements or associated elements to the surface. Some of these are retained in the gas, while others are transformed into various active states and exist in the loose surface medium. Geochemical gas-ground measurement aims to capture and measure this portion of the gas in the surface soil that reflects information about deep mineral-bearing conditions.

[0003] The current method for detecting ground gas in soil involves first drilling a test hole into the soil using a special steel rod, then pulling out the rod and inserting a special sampler into the hole, using a sampling pump to extract the gas. Because the steel rod and sampling drill must be used in conjunction, the entire sampling process presents the following problems: 1. Pulling out the steel rod is difficult due to the lack of a point of leverage, especially in denser soil layers; 2. If the surface soil is loose, the rod can easily collapse during extraction, making it impossible to continue sampling. Third, after the steel rod is pulled out, atmospheric air will inevitably mix into the hole formed, so the gas extracted later will contain atmospheric contaminants, thus affecting the sampling results; Fourth, the air inlet at the bottom of the sampler is easily blocked or covered by soil particles when it is inserted, and when the sampling pump draws in air and generates negative pressure, it will forcibly adsorb the surrounding loose soil particles to the air inlet, which will also cause blockage, preventing the ground air from entering the collection system normally, directly causing detection interruption or data distortion. This problem is particularly prominent in soft soil or soil with high sand content. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes a portable ground-gas separation and collection device.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a portable ground-gas separation and collection device, comprising a hammer-driven pile with a chamber, a sampling tube inserted into the hammer-driven pile, the hammer-driven pile comprising, from top to bottom, an upper pile body, a sampling pile, and a lower pile body, the upper end of the sampling pile slidingly connected to the lower end of the upper pile body in a vertical direction, and the bottom end of the sampling pile being inserted into the lower pile body, the upper pile body and the lower pile body being fixedly connected by a connecting rod, a lifting device being installed at the top of the upper pile body for adjusting the height of the sampling tube, a partition layer being fixedly connected to the lower side wall of the sampling tube, and a filter hole being provided on the lower side wall of the sampling pile.

[0006] By adopting the above scheme, there is no need to use a steel rod to drill holes and connect with the sampler. The hammer pile can be directly driven into the soil layer to complete the installation, eliminating the step of pulling out the steel rod. This not only avoids the problem of difficulty in pulling out the steel rod due to the lack of a point of leverage, but also effectively prevents the collapse of the hole in the loose surface soil and the entry of air into the hole. This ensures that the collected ground air is not affected by the outside air, and significantly improves the accuracy and reliability of the sampling results.

[0007] Preferably, the sampling tube includes a tube body, an air inlet pipe and a retractable air outlet pipe are fixedly installed inside the tube body, the lower pile body has a cavity inside, the side wall of the cavity has a flow hole, and the top of the cavity has an opening that is fixedly connected to the bottom end of the air outlet pipe.

[0008] Preferably, a sealing ring is slidably provided on the outer wall of the cavity, an elastic element is fixedly provided at the bottom end of the sealing ring and the bottom wall of the lower pile body, and an extension ring is fixedly provided at the top end of the sealing ring.

[0009] Preferably, a partition cylinder is fixedly provided on the inner top wall of the cavity, the bottom end of the partition cylinder is open and a one-way valve is provided, a liquid inlet channel is provided between the partition cylinder and the lower pile body, a filter plate is fixedly provided inside the liquid inlet channel, a liquid extraction pipe is fixedly provided at the bottom end of the opening, and a sealing ring is fixedly connected to the outer wall of the valve plate of the one-way valve by a rod.

[0010] Preferably, the interior of the partition cylinder is equipped with a liquid level sensor that is fixedly connected to the top wall of the cavity, and the liquid extraction pipe is equipped with a drainage device.

[0011] Preferably, the drainage device includes an electric cylinder embedded and fixed inside the lower pile body. The electric cylinder is located below the drainage pipe and a sealing plug is fixed at the drive end. A one-way valve is fixed inside the drainage pipe. The upper side wall of the drainage pipe is recessed outward to form a venting cavity. A sealing block is provided inside the venting cavity, and an elastic telescopic rod is fixed between the sealing block and the venting cavity.

[0012] Preferably, the sampling pile includes an upper layer, a sampling layer and a lower layer that are rotatably connected in sequence, and the inner sidewall of the sampling layer is fixed with blades, the top of the cavity is fixed with a guide pipe, and the sidewall of the guide pipe is provided with a guide end facing the sampling layer.

[0013] Preferably, the bottom end of the upper pile body is fixed with a blocking ring through a connecting rod that passes through the lower pile body, and the blocking ring is sleeved on the outside of the lower pile body.

[0014] Preferably, the upper pile body includes an outer cylinder and an inner cylinder that are slidably connected. A sealing cover is slidably provided on the outer side of the outer cylinder. An installation cavity is opened inside the sealing cover. A limit rod is inserted into the installation cavity. Several through holes are opened from top to bottom on the side wall of the outer cylinder.

[0015] Preferably, the upper side wall of the inner cylinder has a limiting hole corresponding to the limiting rod, and an elastic element two is sleeved on the outer side of the limiting rod, and the elastic element two is located in the mounting cavity.

[0016] Working principle: Rotating the threaded ring moves the sampling tube downwards. As the sampling tube moves downwards, it drives the sampling pile downwards through the partition layer, causing the filter hole to descend and be housed in the lower pile body. The lower pile body forms a closed protective structure, preventing soil from directly contacting the filter hole and causing blockage during insertion. When the filter hole is blocked by soil and cannot enter air, rotating the threaded ring causes the filter hole to descend and be housed in the lower pile body. At this time, the sampling pile pushes down the extension ring, causing the sealing ring to be misaligned with the flow hole, thereby opening the flow hole. Then, the air pump is controlled to backflush, and high-pressure gas is introduced through the air inlet pipe. The high-pressure gas backflushes and cleans the filter hole from the inside to the outside, thereby removing the impurities blocking the filter hole. The high-pressure airflow carries the cleaned impurities into the cavity through the flow hole, and then discharges through the opening and the air outlet pipe, thus cleaning the filter hole.

[0017] This invention provides a portable ground-atmosphere separation and capture device. It has the following advantages:

[0018] 1. This invention eliminates the need for additional drilling and sampling operations using steel rods. The hammer-driven piles can be directly driven into the soil layer to complete the installation, eliminating the step of pulling out the steel rod. This effectively avoids the problem of hole collapse when pulling out the steel rod and the situation of atmospheric mixing into the hole, ensuring that the collected ground gas is not affected by the outside air, and significantly improving the accuracy and reliability of the sampling results.

[0019] 2. This invention uses a combination of air pump backflushing and mechanical linkage to open the flow holes. Combined with the centrifugal force generated by the rotation of the sampling layer, the filter holes can be cleaned of clogged impurities without the need for removal of the device. At the same time, the pressure sensor can monitor and indicate the blockage status, making it suitable for complex sampling environments with loose soil and high sand content, ensuring continuous sampling and improving work efficiency.

[0020] 3. This invention collects water from the soil through structures such as cavities, partitions, and liquid inlet channels. It uses a liquid level sensor to monitor the liquid level and a drainage mechanism driven by a water pump or electric cylinder to quickly drain the accumulated liquid in the device, preventing the accumulated liquid from affecting the negative pressure adsorption of ground gas. At the same time, it prevents groundwater from mixing into the accumulated liquid and diluting the ground gas components, further ensuring the accuracy of the sampling data.

[0021] 4. The upper pile body of this invention adopts a sliding connection structure between the outer cylinder and the inner cylinder. The insertion depth can be flexibly adjusted by positioning with a limiting rod and segmented hammering. There is no need to pull out the hammered pile body, which reduces the risk of soil loosening and hole collapse. It is suitable for multi-depth ground gas collection scenarios. When storing, the outer cylinder and the inner cylinder can be fixed, and the limiting rod can be used as the force point of the pulling device to reduce the difficulty of pulling out. The overall design takes into account portability and versatility, reduces the operating burden of workers, and is easy to carry. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present invention;

[0023] Figure 2 This is a schematic cross-sectional view of the hammer-driven pile of the present invention;

[0024] Figure 3 This is a schematic diagram of the threaded ring structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the hammer-driven pile of the present invention;

[0026] Figure 5 For the present invention Figure 4 A schematic diagram of structure A;

[0027] Figure 6 This is a schematic diagram of the internal structure of the partition cylinder of the present invention;

[0028] Figure 7 This is a schematic diagram of the internal structure of the liquid extraction tube of the present invention;

[0029] Figure 8 This is a schematic diagram of the upper pile structure of the present invention.

[0030] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0031] Among them, 1. Hammered pile; 101. Upper pile body; 102. Sampling pile; 103. Lower pile body; 104. Threaded ring; 105. Filter hole; 106. Cavity; 107. Sealing ring one; 108. Elastic element one; 109. Guide pipe; 110. Divider; 111. One-way valve one; 112. Filter plate; 113. Liquid extraction pipe; 114. Sealing ring two; 115. Liquid level sensor; 116. Electric pusher cylinder; 117. Sealing plug; 118. One-way valve two; 119. Vent chamber; 120. Sealing block; 121. Elastic telescopic rod; 122. Blocking ring; 123. Electric push rod;

[0032] 1011. Outer cylinder; 1012. Inner cylinder; 1014. Limiting rod; 1015. Through-hole; 1016. Limiting hole; 1017. Elastic element two; 1018. Sealing cap;

[0033] 1021. Upper layer; 1022. Sampling layer; 1023. Lower layer; 1024. Blade;

[0034] 2. Sampling tube; 201. Tube body; 202. Inlet pipe; 203. Outlet pipe;

[0035] 3. Separator layer. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1, please refer to the appendix. Figure 1 -Appendix Figure 3 This invention provides a portable ground-atmosphere separation and capture device, comprising a hammer-driven pile 1 with a chamber and a sampling tube 2 inserted into the hammer-driven pile 1. The hammer-driven pile 1 comprises, from top to bottom, an upper pile body 101, a sampling pile 102, and a lower pile body 103. The upper end of the sampling pile 102 is slidably connected to the lower end of the upper pile body 101 in a vertical direction, and the bottom end of the sampling pile 102 is inserted into the lower pile body 103. The upper pile body 101 and the lower pile body 103 are fixedly connected by a connecting rod. The lifting device includes a threaded ring 104, which is rotatably connected to the top of the upper pile body 101 and threadedly connected to the sampling tube 2. A partition layer 3 is fixed on the lower side wall of the sampling tube 2 and is fixedly connected to the sampling pile 102. A filter hole 105 is opened on the lower side wall of the sampling pile 102 for filtering particulate impurities. A sealing ring is fixed on the inner wall of the top of the lower pile body 103 to improve the sealing between the lower pile body 103 and the sampling pile 102.

[0038] Specifically, rotating the threaded ring 104 causes the sampling tube 2 to move downwards. As the sampling tube moves downwards, it drives the sampling pile 102 to slide downwards through the partition layer 3, causing the filter hole 105 to descend and be housed within the lower pile body 103. The lower pile body 103 forms a closed protective structure, preventing soil from directly contacting the filter hole 105 and causing blockage during insertion. Subsequently, the hammer pile 1 is driven into the soil layer. After completion, the sampling tube is rotated in the opposite direction to move the filter hole 105 out of the lower pile body 103. The ground gas enters the chamber through the filter hole 105 and is discharged upwards through the sampling tube 2. There is no need for additional drilling with a steel rod to connect with the sampler. The hammer pile 1 can be directly driven into the soil layer to complete the installation, eliminating the step of pulling out the steel rod. This also helps to avoid hole collapse and atmospheric mixing after the steel rod is pulled out, ensuring that the collected ground gas is not affected by the outside air and improving the accuracy and reliability of the sampling results.

[0039] Example 2, please refer to the appendix. Figure 2 Unlike Embodiment 1, the lifting device uses a waterproof electric push rod 123, which is fixed to the top of the upper pile body 101, and the drive end of the electric push rod 123 is fixedly connected to the top of the sampling tube 2.

[0040] The height of the sampling tube 2 can be adjusted by raising and lowering the electric push rod 123, which facilitates the automated cleaning of the filter holes 105 and reduces the workload of the staff.

[0041] Example 3, please refer to the appendix. Figure 4 When used in humid areas, liquid easily accumulates inside the device and is difficult to drain quickly, affecting the effectiveness of negative pressure adsorption of ground gas. Furthermore, the extracted groundwater mixed with the accumulated liquid dilutes the ground gas components. This embodiment proposes the following solution to address these problems: The sampling tube 2 includes a tube body 201. An inlet pipe 202 and a retractable outlet pipe 203 are fixedly installed inside the tube body 201. A cavity 106 is formed inside the lower pile body 103. A flow hole is formed on the side wall of the cavity 106, and an opening is formed at the top of the cavity 106 that is fixedly connected to the bottom end of the outlet pipe 203. The outer side of the cavity 106... A sealing ring 107 is slidably installed on the wall. The sealing ring retains the sealing ring fixed to the inner wall of the ring body. An elastic element 108 is fixed to the bottom end of the sealing ring 107 and the inner bottom wall of the lower pile body 103. An extension ring is fixed to the top end of the sealing ring 107. A pressure sensor and an alarm are installed on the upper air inlet pipe 202 to collect air pressure data in real time and transmit it to the controller. When the pressure value exceeds the set threshold for 3-5 seconds, it is determined that the filter hole 105 is blocked. The operator can be prompted to start the cleaning program through an audible and visual alarm. Alternatively, the controller can be electrically connected to the electric push rod 123 for automatic cleaning.

[0042] Specifically, the top of the air inlet pipe 202 is connected to the air pump and the separation and collection equipment in sequence. The air pump generates negative pressure at the filter hole 105 to extract the ground air. The separation and collection equipment includes a dust removal unit, a dehumidification unit, an adsorption and collection unit and a temperature control unit, all of which are existing technologies and will not be described in detail here. The air pump adopts a vortex air pump that can rotate in both directions, a piston high-pressure air pump, etc.

[0043] Initially, the sealing ring 107 is held at the flow hole by the elastic force of the elastic element 108, sealing the flow hole. When the filter hole 105 is blocked by soil and cannot allow air to enter, the threaded ring 104 is rotated to lower the filter hole 105 and retract it into the lower pile body 103. At this time, the sampling pile 102 pushes down and extends the extension ring, causing the sealing ring 107 to be displaced from the flow hole, thereby opening the flow hole. Then, the air pump is controlled to backflush and input high-pressure gas through the air inlet pipe 202. The high-pressure gas backflushes and cleans the filter hole 105 from the inside out, thereby removing the impurities blocking the filter hole 105. The high-pressure airflow carries the cleaned impurities through the flow hole. The air enters the cavity 106 and is then discharged through the opening and the air outlet pipe 203, thereby cleaning the filter hole 105. This device uses a combination design of air pump back-blowing and mechanical linkage to open the flow hole, which can clean the filter hole 105 without removing the device, avoiding the drawbacks of traditional cleaning methods, ensuring continuous sampling, greatly improving work efficiency, and is especially suitable for complex sampling environments with loose soil or high sand content. It is also convenient for subsequent cleaning and maintenance operations. During cleaning, the high-pressure airflow only acts on the inside of the hammer pile 1 without disturbing the soil layer. While ensuring the cleaning effect of the filter hole 105, it maximizes the protection of the integrity of the sampling environment and the authenticity of the ground gas composition.

[0044] Furthermore, when water accumulates in the sampling pile 102, the water can be drained by backflushing with an air pump through the above steps.

[0045] Please see the appendix Figure 4 The sampling pile 102 includes an upper layer 1021, a sampling layer 1022 and a lower layer 1023 that are rotatably connected in sequence, and a sealing structure, such as "maze seal + bearing", is provided at the intersection. The inner sidewall of the sampling layer 1022 is fixed with blades 1024, the top of the cavity 106 is fixed with a guide pipe 109, and the sidewall of the guide pipe 109 faces the sampling layer 1022 and has a guide end. The filter hole 105 is located on the sampling layer 1022.

[0046] Specifically, when the sampling pile 102 descends, it drives the air inlet pipe 202 to connect and insert into the guide pipe 109. At this time, the high-pressure airflow, through the cooperation of the guide pipe 109 and the guide end, changes from a straight flow to an L-shaped flow, thus directly facing the sampling layer 1022, increasing the impact force on the filter hole 105. When the high-pressure gas flows out from the guide end, it cooperates with the blade 1024 to drive the sampling layer 1022 to rotate and generate centrifugal force, thereby accelerating the ejection of impurities in the filter hole 105, which helps to improve the cleaning effect of the filter hole 105.

[0047] Please see the appendix Figure 4 The bottom end of the upper pile body 101 is fixed with a blocking ring 122 through a connecting rod that passes through the lower pile body 103, and the blocking ring 122 is sleeved on the outside of the lower pile body 103.

[0048] Specifically, when the sampling pile 102 descends, it simultaneously drives the blocking ring 122 to descend to the filter plate 112 for protection, so as to prevent the soil from blocking the filter plate 112 when the device is inserted into the soil. After the sampling pile 102 rises, the blocking ring 122 rises simultaneously to open the filter plate 112.

[0049] Example 4, please refer to the appendix. Figure 4 -Appendix Figure 6 Cleaning accumulated liquid by backflushing with an air pump can affect the efficiency of collecting ground gas. This example proposes the following solution to address the above problem: A partition cylinder 110 is fixedly installed on the inner top wall of the cavity 106. The bottom end of the partition cylinder 110 is open and equipped with a one-way valve 111. A liquid inlet channel is opened between the partition cylinder 110 and the lower pile body 103. A filter plate 112 is fixedly installed inside the liquid inlet channel, and a suction pipe 113 is fixedly installed at the bottom end of the opening. A sealing ring 114 is fixedly connected to the outer wall of the valve plate of the one-way valve 111 by a rod. The outer wall of the sealing ring 114 fits against the inner wall of the partition cylinder 110. The one-way valve 111 includes a sealing valve plate. A T-shaped rod is installed through the surface of the valve plate. The bottom end of the T-shaped rod is fixedly connected to the inner bottom wall of the partition cylinder 110, and an elastic element is sleeved on the surface of the T-shaped rod above the valve plate. The elastic element applies downward pressure to the valve plate, causing the valve plate to insert... The bottom opening of the partition cylinder 110 is sealed. A one-way valve is used to close the opening of the partition cylinder 110. During backflushing, the valve plate is pushed upward by the airflow to open the opening of the partition. At the same time, the valve plate drives the sealing ring 114 to slide up and down to block the liquid inlet channel, preventing high-pressure gas from being discharged through the liquid inlet channel during backflushing. A liquid level sensor 115 is fixedly connected to the top wall of the cavity 106 inside the partition cylinder 110. A liquid drainage device is installed on the liquid extraction pipe 113. The liquid drainage device uses a water pump. The liquid level sensor 115 and the liquid drainage device are electrically connected to the controller. When the liquid drainage device uses a water pump, a three-way pipe with an electric valve is threaded to the top of the vent pipe 203. The electric valve is electrically connected to the controller. One end of the three-way pipe is connected to the water pump for discharging liquid, and the other end is used for discharging gas. When venting, the valve at the liquid discharge end is closed, and when discharging liquid, the valve at the vent end is closed.

[0050] Specifically, the water in the soil is filtered through the filter plate 112 to remove particulate impurities and then enters the diaphragm 110 through the liquid inlet channel for collection, thereby reducing the accumulation of liquid at the sampling pile 102. The liquid level in the diaphragm 110 is detected by the liquid level sensor 115, and when the liquid level reaches the preset value, the liquid in the diaphragm 110 is pumped out and discharged by the water pump.

[0051] Example 5, please refer to the appendix. Figure 4 -Appendix Figure 7Unlike Embodiment 4, the drainage device includes an electric cylinder 116 embedded and fixed inside the lower pile body 103. The electric cylinder 116 is waterproof and is located below the suction pipe 113, with a sealing plug 117 fixed at the drive end. A one-way valve 118 is fixed inside the suction pipe 113. The one-way valve 118 is a spring-loaded one-way valve. The upper side wall of the suction pipe 113 is recessed outward to form a venting chamber 119. A sealing block 120 is provided inside the venting chamber 119, and an elastic telescopic rod 121 is fixed between the sealing block 120 and the venting chamber 119. The sealing plug 117 can slide and seal with the suction pipe 113. The sealing block 120 is pressed against the inner wall of the venting chamber 119 by the elastic force of the elastic telescopic rod 121 to form a closure. During use, the filter plate 112 is not prone to blockage due to the absence of negative pressure. After use, high-pressure liquid can be injected through the air outlet 203 for backflushing to clean and maintain it.

[0052] Specifically, during drainage, the electric pusher cylinder 116 extends and pushes the sealing plug 117 upward, pushing the liquid inside the suction tube 113 upward. The one-way valve 118 opens under the upward force of the liquid, allowing the liquid to flow upward through it. When the sealing plug 117 reaches its highest point, it is below the vent chamber 119. Subsequently, the sealing plug 117 descends, and under negative pressure, the one-way valve 118 closes. The sealing block 120 slides towards the drainage tube side under the suction force of the negative pressure, from... By opening the venting chamber 119, the sealing plug 117 can descend smoothly. By repeating the above steps, the accumulated liquid can be transported to the internal space of the suction pipe 113 above the one-way valve 118, thereby draining the accumulated liquid. The electric push cylinder 116 is embedded. The sealing plug 117, one-way valve 118, venting chamber 119 and other components are all integrated inside the suction pipe 113 and the lower pile body 103. There is no need for additional external water pumps, connecting pipelines and other independent equipment, which reduces the carrying volume and assembly complexity of the equipment.

[0053] Example 6, please refer to the appendix. Figure 8 In conjunction with Embodiment 2, the upper pile body 101 includes an outer cylinder 1011 and an inner cylinder 1012 that are slidably connected. A sealing cover 1018 is slidably provided on the outer side of the outer cylinder 1011. An installation cavity is opened inside the sealing cover 1018. A limit rod 1014 is inserted into the installation cavity. Several through holes 1015 are opened from top to bottom on the side wall of the outer cylinder 1011.

[0054] Specifically, when the insertion distance of the hammer-driven pile 1 needs to be increased, the limiting rod 1014 is pulled outward to push its inner end into the installation cavity. Then, the outer cylinder 1011 is slid to a suitable height, and the limiting rod 1014 is passed through the through-hole 1015 to above the inner cylinder 1012. At this time, the outer cylinder 1011 is hammered, and the impact force is transmitted to the inner cylinder 1012 through the limiting rod 1014, causing the hammer-driven pile 1 to move downward. By repeating the above steps to form segmented hammering, the insertion depth of the hammer-driven pile 1 can be increased until the sealing cap 1018 is inserted into the hole for sealing, reducing the leakage of ground gas. This structure... Depth adjustment is achieved through "positioning by limit rod 1014 + segmented hammering" without removing the hammer pile 1 body, reducing soil loosening and the risk of hole collapse. It is suitable for multi-depth ground gas collection scenarios, improving the versatility of the equipment. In addition, the contact area between the inner cylinder 1012 and the soil is smaller than that of the entire hammer pile 1. Furthermore, the inner cylinder 1012 is fixed to the lower pile body 103 and the sampling pile 102 through connecting rods, making the friction force of the soil more concentrated. When the outer cylinder 1011 is pulled out first, the soil's wrapping resistance to the outer cylinder 1011 can be removed first, leaving only the inner cylinder 1012 in contact with the soil. The pulling force required when pulling out the inner cylinder 1012 is greatly reduced.

[0055] Please see the appendix Figure 8 The upper side wall of the inner cylinder 1012 is provided with a limiting hole 1016 corresponding to the limiting rod 1014. An elastic element 1017 is sleeved on the outer side of the limiting rod 1014 and the elastic element 1017 is located in the mounting cavity. A handle is fixedly provided on the outer end of the limiting rod 1014.

[0056] Specifically, after use, the handle and the limiting rod 1014 provide a point of leverage for the worker to pull out the hammer pile 1. When storing the device, the limiting rod 1014 is inserted into the limiting hole 1016 through the through hole 1015. Under the elastic force of the elastic element 1017, the inner end of the limiting rod 1014 is tightly inserted into the limiting hole 1016, thereby fixing the outer cylinder 1011 and the inner cylinder 1012 for easy carrying.

[0057] Workflow:

[0058] I. Equipment Preparation and Deployment

[0059] S1. Adjust the initial state of the device: Rotate the threaded ring 104 at the top of the upper pile body 101 to move the sampling tube 2 downward. The sampling pile 102 is driven to slide down through the partition layer 3, and the filter hole 105 on the side wall of the sampling pile 102 is stored in the lower pile body 103. The lower pile body 103 forms a closed protection to prevent the filter hole 105 from being blocked by soil particles during the insertion process.

[0060] S2. Flexible adjustment of insertion depth: If a deeper insertion depth is required, pull the limiting rod 1014 on the sealing cover 1018 outward so that its inner end exits the limiting hole 1016 and retracts into the installation cavity. After sliding the outer cylinder 1011 to a suitable height, release the limiting rod 1014. Under the action of the elastic element 1017, the limiting rod 1014 passes through the through hole 1015 of the outer cylinder 1011 and is inserted into the limiting hole 1016 of the inner cylinder 1012, thereby fixing the outer cylinder 1011 and the inner cylinder 1012. By hammering the outer cylinder 1011 in sections, the impact force is transmitted to the inner cylinder 1012 with the help of the limiting rod 1014, driving the entire hammer pile 1 to be gradually driven into the soil layer until the preset sampling depth is reached. Finally, insert the sealing cover 1018 into the hole to complete the seal and reduce the leakage of ground gas.

[0061] II. Ground Gas Collection

[0062] S1. Open the sampling channel: Rotate the threaded ring 104 in the opposite direction to move the sampling tube 2 upward, which will drive the sampling pile 102 to rise, allowing the filter hole 105 to move out of the lower pile body 103 and be exposed in the soil; at this time, the upper pile body 101 and the lower pile body 103 are fixed by the connecting rod, and the sampling pile 102 and the lower pile body 103 are connected to each other to ensure the sealing of the device.

[0063] S2. Negative pressure extraction of ground gas: Connect the air pump and the separation and collection device to the top of the air inlet pipe 202 in sequence. Start the air pump to rotate forward and generate negative pressure at the filter hole 105. The ground gas in the soil enters the hammer pile 1 chamber after being filtered of impurities through the filter hole 105, and is then transported to the separation and collection device through the air inlet pipe 202 to complete the separation and collection of ground gas.

[0064] S3. Real-time monitoring of blockage: The pressure sensor on the intake pipe 202 collects air pressure data in real time. If the pressure value exceeds the set threshold for 3-5 consecutive seconds, it is determined that the filter hole 105 is blocked, and the alarm will issue an audible and visual warning.

[0065] III. Cleaning of Filter Holes 105

[0066] S1. Sealing and Ventilation Preparation: Rotate the threaded ring 104 (or start the electric push rod 123) to make the sampling pile 102 slide down, and the filter hole 105 is retracted into the lower pile body 103; when the sampling pile 102 slides down, it abuts against the extension ring of the sealing ring 107, causing the sealing ring 107 to move down and be offset from the flow hole on the side wall of the cavity 106, thus opening the flow hole.

[0067] S2. High-pressure backflushing + centrifugal assisted cleaning: The air pump is started in reverse to perform high-pressure backflushing. High-pressure gas enters the chamber through the air inlet pipe 202 and impacts and blocks impurities from the inside to the outside through the filter holes 105. At the same time, the high-pressure gas flows out through the guide end of the guide pipe 109 and cooperates with the blades 1024 on the inner side wall of the sampling layer 1022 to drive the sampling layer 1022 to rotate and generate centrifugal force, which accelerates the ejection of impurities in the filter holes 105. The impurities enter the cavity 106 through the flow hole with the high-pressure airflow and are then discharged from the device through the opening and the retractable air outlet pipe 203.

[0068] S3. Restore sampling status: After cleaning, rotate the threaded ring 104 in the opposite direction again (or start the electric push rod 123) to raise the sampling pile 102, expose the filter hole 105 again, and reset the sealing ring 107 under the action of the elastic element 108 to reseal the flow hole and restore the ground gas collection process.

[0069] IV. Treatment of Accumulated Liquid

[0070] S1. Liquid collection and monitoring: After being filtered by the filter plate 112 in the liquid inlet channel, the liquid in the soil enters the cavity 106 and the partition cylinder 110 of the lower pile body 103; the liquid level sensor 115 in the partition cylinder 110 monitors the liquid level in real time, and sends a signal to the controller when the liquid level reaches the preset value.

[0071] S2, drainage of accumulated fluid:

[0072] S21, Water pump drainage mode (optional): The controller starts the water pump on the suction pipe 113, opens the drainage valve of the three-way pipe, closes the exhaust valve, and discharges the accumulated liquid in the partition cylinder 110 through the suction pipe 113 and the three-way pipe; after the drainage is completed, the valve status is switched to resume sampling.

[0073] S22, Electric pusher cylinder 116 drainage mode (optional): Activate the electric pusher cylinder 116 in the lower pile body 103 to drive the sealing plug 117 to slide upward, push the accumulated liquid in the suction pipe 113, open the one-way valve 118, and the accumulated liquid flows upward and is stored in the suction pipe 113 space above the one-way valve 118; when the sealing plug 117 descends, the one-way valve 118 closes, and the sealing block 120 in the venting chamber 119 slides open the venting chamber 119 under negative pressure, ensuring that the sealing plug 117 is successfully reset; repeat the above actions until the accumulated liquid is completely discharged.

[0074] V. Equipment Recycling and Storage

[0075] S1. Cleaning the inside of the device: If the filter plate 112 in the liquid inlet channel is blocked, inject high-pressure liquid through the air outlet pipe 203 to backflush the filter plate 112 to complete the cleaning; turn off the air pump and related equipment, and disconnect the pipeline connection.

[0076] S2. Pulling out and storing: Hold the outer handle of the limiting rod 1014 and use the limiting rod 1014 as the point of force to pull the hammer pile 1 out of the soil as a whole; adjust the relative position of the outer cylinder 1011 and the inner cylinder 1012 so that the limiting rod 1014 is inserted into the limiting hole 1016 and fixed, and fold the device for easy carrying.

[0077] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable ground-gas separation and capture device, comprising a hammer-driven pile (1) with a chamber, characterized in that: A sampling tube (2) is inserted into the hammer pile (1). The hammer pile (1) includes an upper pile body (101), a sampling pile (102), and a lower pile body (103) from top to bottom. The upper end of the sampling pile (102) is slidably connected to the lower end of the upper pile body (101) in the vertical direction, and the bottom end of the sampling pile (102) is inserted into the lower pile body (103). The upper pile body (101) and the lower pile body (103) are fixedly connected by a connecting rod. A lifting device is installed at the top of the upper pile body (101) to adjust the height of the sampling tube (2). A partition layer (3) is fixed on the lower side wall of the sampling tube (2), and the partition layer (3) is fixedly connected to the sampling pile (102). A filter hole (105) is opened on the lower side wall of the sampling pile (102).

2. The portable ground-atmosphere separation and capture device according to claim 1, characterized in that: The sampling tube (2) includes a tube body (201), an air inlet pipe (202) and a retractable air outlet pipe (203) are fixedly installed inside the tube body (201), a cavity (106) is opened inside the lower pile body (103), a flow hole is opened on the side wall of the cavity (106), and an opening is opened at the top of the cavity (106) to be fixedly connected to the bottom end of the air outlet pipe (203).

3. The portable ground-gas separation and capture device according to claim 2, characterized in that: A sealing ring (107) is slidably provided on the outer wall of the cavity (106). An elastic element (108) is fixedly provided at the bottom end of the sealing ring (107) and the inner bottom wall of the lower pile body (103). An extension ring is fixedly provided at the top end of the sealing ring (107).

4. The portable ground-gas separation and capture device according to claim 2, characterized in that: The inner top wall of the cavity (106) is fixedly provided with a partition cylinder (110). The bottom end of the partition cylinder (110) is open and a one-way valve (111) is provided. A liquid inlet channel is opened between the partition cylinder (110) and the lower pile body (103). A filter plate (112) is fixedly provided inside the liquid inlet channel. A liquid extraction pipe (113) is fixedly provided at the bottom end of the opening. A sealing ring (114) is fixedly connected to the outer wall of the valve plate of the one-way valve (111) by a rod.

5. A portable ground-gas separation and capture device according to claim 4, characterized in that: The partition (110) is equipped with a liquid level sensor (115) that is fixedly connected to the top wall of the cavity (106), and the pumping pipe (113) is equipped with a drainage device.

6. A portable ground-gas separation and capture device according to claim 5, characterized in that: The drainage device includes an electric cylinder (116) embedded and fixed inside the lower pile body (103). The electric cylinder (116) is located below the drainage pipe (113) and a sealing plug (117) is fixed at the drive end. A one-way valve (118) is fixed inside the drainage pipe (113). The upper side wall of the drainage pipe (113) is recessed outward to form a venting chamber (119). A sealing block (120) is provided inside the venting chamber (119), and an elastic telescopic rod (121) is fixed between the sealing block (120) and the venting chamber (119).

7. A portable ground-gas separation and capture device according to claim 2, characterized in that: The sampling pile (102) includes an upper layer (1021), a sampling layer (1022) and a lower layer (1023) that are rotatably connected in sequence. The inner sidewall of the sampling layer (1022) is fixed with blades (1024). The top of the cavity (106) is fixed with a guide pipe (109), and the sidewall of the guide pipe (109) faces the sampling layer (1022) and has a guide end.

8. A portable ground-gas separation and capture device according to claim 4, characterized in that: The bottom end of the upper pile body (101) is fixedly connected to a blocking ring (122) through a connecting rod that passes through the lower pile body (103), and the blocking ring (122) is sleeved on the outside of the lower pile body (103).

9. A portable ground-gas separation and capture device according to claim 1, characterized in that: The upper pile body (101) includes an outer cylinder (1011) and an inner cylinder (1012) that are slidably connected. A sealing cover (1018) is slidably provided on the outer side of the outer cylinder (1011). An installation cavity is opened inside the sealing cover (1018). A limit rod (1014) is inserted into the installation cavity. Several through holes (1015) are opened from top to bottom on the side wall of the outer cylinder (1011).

10. A portable ground-gas separation and capture device according to claim 9, characterized in that: The upper side wall of the inner cylinder (1012) is provided with a limiting hole (1016) corresponding to the limiting rod (1014), and an elastic element (1017) is sleeved on the outer side of the limiting rod (1014).

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