Soil environment aeration improvement device

Abstract

The invention relates to the technical field of aeration devices, in particular to a soil environment aeration improvement device. Comprising a ventilation well and a gas distribution cabin sent into the ventilation well through a lifting device. The ventilation well comprises an outer cylinder, an inlet and an outlet are longitudinally distributed in the outer cylinder, a cylinder cover is detachably connected to the top of the outer cylinder, and at least two air inlet positions are arranged on the cylinder cover; the gas distribution cabin comprises a cabin body, two gas claws with inner cavities are connected in the cabin body in a sliding mode, the two gas claws are driven by an actuator to retract into the cabin body or stretch out of the cabin body, the gas claws are communicated with the interior and the exterior of the cabin body, and the gas claws can penetrate through any inlet and outlet to stretch into soil; the upper end of the cabin body is fixedly connected with a cabin cover for sealing the top of the cabin body, the upper end of the cabin cover is fixedly connected and communicated with a communicating pipe, the upper end of the communicating pipe can penetrate through one external pipe, and an air source can sequentially pass through the communicating pipe, the cabin body, the air claw and soil.

Description

Technical Field

[0001] This invention relates to the field of aeration device technology, and more specifically to a soil environment aeration and improvement device. Background Technology

[0002] Aeration improvement technology is widely used in the remediation of soils contaminated with volatile organic compounds (VOCs) because it can promote the volatilization, degradation, or oxidation of pollutants by introducing air or specific gases into the soil.

[0003] The flexibility of fixed aeration in existing technologies needs improvement. Although mobile aeration equipment can change the aeration position to some extent, it mostly relies on manual operation to adjust the depth, and the positioning accuracy needs improvement, making it difficult to achieve precise targeted remediation of specific contaminated soil layers.

[0004] Furthermore, soil heterogeneity leads to uneven gas diffusion paths within the soil. Existing aeration devices often employ a single gas delivery method, causing gas to easily form dominant channels along pores, making it difficult to achieve uniform distribution in the contaminated area and further affecting remediation effectiveness. Additionally, existing devices typically separate aeration from soil sampling, requiring separate sampling and testing, which increases operational procedures and costs, hindering efficient remediation operations. Summary of the Invention

[0005] This invention provides a soil environment aeration improvement device, the purpose of which is to improve the flexibility of fixed aeration.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A soil environment aeration and improvement device includes an aeration well and an air distribution chamber that is fed into the aeration well via a lifting device.

[0008] The ventilation well includes an outer cylinder with inlets and outlets distributed longitudinally on the upper part of the outer cylinder. A cylinder cover is detachably connected to the top of the outer cylinder, and the cylinder cover is provided with at least two air inlet positions.

[0009] The air distribution chamber includes a chamber body, inside which two air grippers with internal cavities are slidably connected. The two air grippers are driven by actuators to retract into or extend out of the chamber body. The air grippers are connected to the inside and outside of the chamber body, and the air grippers can pass through any inlet or outlet to extend into the soil.

[0010] The upper end of the cabin is fixedly connected to a cover that seals its top. The upper end of the cover is fixedly connected to and connected to a connecting pipe. The upper end of the connecting pipe can pass through one of the air inlet positions, and the air source can pass through the connecting pipe, the cabin, the air gripper and the soil in sequence.

[0011] The pneumatic gripper includes a cavity wall, with the openings of the two cavity walls facing each other. In the initial state, the back-to-back ends of the cavity walls protrude from the cabin body, and air holes are provided on the upper, lower, front, and rear sides of the protruding part and on the two back-to-back end faces.

[0012] It also includes PLC control. Pressure sensors and VOCs concentration sensors are arranged inside and outside the gas distribution chamber. The pressure sensors and VOCs concentration sensors are electrically connected to the PLC controller through transmitters. The PLC controller is electrically connected to the lifting and releasing device, the actuator and the variable frequency aerator respectively. The variable frequency aerator is connected to the connecting pipe or the nearest position through pipeline.

[0013] The center of the nearest position through which the connecting pipe passes coincides with the axis of the cabin.

[0014] One of the air intake positions is an external pipe fixed to and connected to the upper end of the cylinder cover. The external pipe is wrapped with a protective layer. The outer skin of the protective layer has scales for depth and circumferential direction. Any mark on the scale can be aligned with the top surface of the external pipe through which the connecting pipe passes. The depth and circumferential direction of the inlet and outlet match the depth and circumferential direction of the scale.

[0015] The cabin has a lever arm at its center. The lower and upper parts of the lever arm are fixedly connected to shafts. The lower shaft is rotatably connected to the bottom of the cabin, and the upper shaft is rotatably connected to the cabin cover. The axes of the two shafts are coincident with the cabin body. The actuator is an electric linear actuator. The fixed end of the actuator is fixed to the inner wall or bottom of the cabin. When the telescopic end extends or retracts, it always keeps in contact with the longitudinal surface of the lever arm. The lever arm can push the two pneumatic grippers away from each other synchronously when rotating.

[0016] Limiting components are fixedly attached to the pneumatic gripper. The face-to-face surfaces of the two limiting components are convex arc surfaces. After rotation, the lever can maintain contact with the two arc surfaces, and the back-to-back surfaces of the two limiting components can abut against the inner wall of the cabin.

[0017] A tension spring is fixed between the two pneumatic grippers, and the tension spring maintains the initial position of the two cavity walls.

[0018] The contact point between the pneumatic gripper and the cabin body is dynamically sealed. When the cavity wall passes through the inlet and outlet, there is a gap between it and the inner contour of the inlet and outlet to form a soil discharge joint.

[0019] A first lifting ring is fixed to the inner wall of the outer cylinder, and a second lifting ring is fixed to the top of the hatch.

[0020] The beneficial effects of the soil environment aeration and improvement device of the present invention are as follows:

[0021] By using a lifting and lowering device to drive the gas distribution chamber to move vertically within the aeration well, the aeration point can be positioned at a designated location, such as the most heavily contaminated soil layer. This addresses the issues of fixed aeration well depth being unadjustable and the need to improve the positioning accuracy of mobile equipment. It allows for flexible layered and segmented aeration based on the vertical distribution characteristics of soil pollution, ensuring thorough remediation of the core contaminated area and improving remediation efficiency and effectiveness.

[0022] Pressure sensors and VOCs concentration sensors arranged inside and outside the gas distribution chamber can collect data in real time and feed it back to the PLC controller via transmitters. The PLC can automatically adjust the output pressure and volume of the variable frequency aerator according to a preset program, and can also control the electric winch to drive the gas distribution chamber to the next aeration section. For example, when the pollutant concentration in a certain area is detected to drop below the threshold, the chamber is automatically raised to the non-compliant area, providing a development approach for achieving fully automated, intelligent, and precise remediation, significantly reducing manual detection and operation, and lowering labor intensity and human error.

[0023] The evenly distributed inlets and outlets on the outer wall of the venting well, in conjunction with the air grippers extending from the gas distribution chamber, form a dual gas delivery path. On one hand, after the air grippers are inserted into the soil, they can deliver gas from multiple directions to a designated depth, achieving enhanced local diffusion. On the other hand, the outer connecting pipe, without a gas delivery pipe, can inject gas, allowing it to be released from all inlets and outlets of the outer cylinder, forming full-depth lateral diffusion. This dual gas delivery method effectively overcomes the limitations of gas channels caused by soil heterogeneity, promotes the uniform distribution of gas in the contaminated area, and improves the contact efficiency between pollutants and gas.

[0024] The design of the soil discharge slot between the air gripper and the inlet / outlet allows a small amount of compressed soil to enter the outer cylinder when the air gripper extends into the soil, enabling the outer cylinder to carry soil samples at a specified depth. This eliminates the need for separate soil sampling operations, allowing for sampling and testing of soil at different depths during aeration. This simplifies the workflow, reduces operating costs, and provides convenient sampling support for real-time adjustments to remediation strategies.

[0025] The gas distribution chamber and the outer cylinder can be operated independently or in combination. For example, after sealing the gap between the gas supply pipe and the outer pipe, the outer cylinder can supply gas independently for an extended period of time, while the gas distribution chamber can choose to maintain or stop gas supply as needed, meeting the gas supply mode requirements of different repair scenarios. Meanwhile, the scale design on the outside of the pipe allows for intuitive judgment of the chamber's descent depth and orientation, ensuring precise alignment of the pneumatic grippers with the inlet and outlet, improving operational convenience and reliability. Attached Figure Description

[0026] Figure 1 This shows a front view of a soil environment aeration and improvement device according to the present invention;

[0027] Figure 2 This shows a schematic diagram of the aeration well of the soil environment aeration and improvement device after partial cutting.

[0028] Figure 3 This shows a top view of the soil environment aeration and improvement device after the cylinder cover has been removed;

[0029] Figure 4 A structural schematic diagram of the outer cylinder and inlet / outlet is shown;

[0030] Figure 5 A schematic diagram of the internal structure of the gas distribution compartment is shown;

[0031] Figure 6 A schematic diagram of the pneumatic gripper mechanism is shown.

[0032] In the diagram: 101, outer cylinder; 102, inlet / outlet; 103, cylinder cover; 104, outer pipe; 105, first lifting ring; 201, cabin; 202, lever arm; 203, actuator; 204, cabin cover; 205, second lifting ring; 206, pipe; 301, cavity wall; 302, vent; 303, limiting element; 304, tension spring. Detailed Implementation

[0033] A soil aeration and improvement device includes a lowered aeration well and an aeration chamber that is lowered into the aeration well by a rope.

[0034] The air distribution chamber is moved vertically within the ventilation well using a lifting and lowering device, such as a manual or electric winch. This allows us to precisely position the aeration point at the desired depth, such as the most heavily polluted soil layer, enabling layered and segmented aeration.

[0035] Pressure sensors and VOCs concentration sensors can be installed inside and outside the gas distribution chamber. These sensors feed real-time data back to the PLC controller via transmitters. The PLC can automatically adjust the output pressure and volume of the variable frequency aerator according to a preset program. An electric winch can also be connected to move the gas distribution chamber to the next aeration section. For example, when the sensors detect that the pollutant concentration in a certain area has dropped below a threshold, the chamber can be automatically raised to the non-compliant area, achieving fully automated, intelligent, and precise remediation.

[0036] The venting well includes an outer cylinder 101, a cylindrical container with an open top. Inlet and outlet 102 are evenly distributed circumferentially and longitudinally on the circumferential wall of the outer cylinder 101. A cylinder cover 103 is detachably connected to the top of the outer cylinder 101, and two external pipes 104 are fixedly connected to and connected to the cylinder cover 103. One external pipe 104 is used to introduce a gas pipeline, i.e., pipe 206, and the other external pipe 104 is used to directly supply gas into the outer cylinder 101. Each external pipe 104 is fitted with a cap to close it when installed. A first lifting ring 105 is fixed to the inner wall of the outer cylinder 101 for suspending the gas distribution chamber.

[0037] The gas distribution compartment includes a cylindrical body 201 with an open top. Two pneumatic grippers with internal cavities are slidably connected within the body 201. These grippers are driven by an actuator 203 to retract into or extend from the body 201. The grippers communicate with the inside and outside of the body 201. A hatch cover 204 is fixed to the upper end of the body 201, sealing the top of the body 201. The upper end of the hatch cover 204 is fixed to the lower end of a connecting pipe 206, the upper end of which passes through one of the external connecting pipes 104.

[0038] Preferably, the axis of the outer tube 104 through which the tube 206 passes coincides with the axis of the cabin 201. The outer tube 104 is wrapped with a metal wire braid layer, which is then covered with a rubber protective layer. The rubber protective layer has markings for depth and circumferential direction, and any mark on these markings can be aligned with the top surface of the outer tube 104 through which the tube 206 passes. The depth and orientation of the inlet / outlet 102 should be matched with these markings to determine the descent depth and orientation of the cabin 201, thus visualizing the alignment of the pneumatic gripper with the inlet / outlet 102.

[0039] After the air gripper extends from the inlet / outlet 102 and inserts into the soil, an air source can be used, but not limited to, an air pump to sequentially input air into the air distribution chamber and air gripper starting from pipe 206, and finally deliver air into the soil from all directions towards the end of the air gripper. At this time, the outer pipe 104 not penetrated by pipe 206 can be sealed, or another air source can be injected into the outer pipe 104 to deliver air into the outer cylinder 101, while the inlet / outlet 102 releases air. On the other hand, the air gripper inserted into the soil at a specified depth performs additional omnidirectional gas ejection. This helps to generate lateral diffusion throughout the soil and enhanced diffusion of gas at specific depths, breaking the limitations of gas channels caused by soil heterogeneity, and promoting enhanced uniform distribution of gas in a designated area, such as a contaminated area.

[0040] The cabin 201 has a centrally located lever arm 202. Shafts are fixed to both the lower and upper parts of the lever arm 202. The lower shaft is rotatably connected to the bottom of the cabin 201, and the upper shaft is rotatably connected to the cabin cover 204. The axes of both shafts coincide with the cabin 201. The actuator 203 is an electrically driven linear actuator, such as an electric push rod. The fixed end of the actuator 203 is fixed to the inner wall or bottom of the cabin 201, and the telescopic end of the actuator 203 maintains contact with the vertical plane of the lever arm 202 during extension and retraction. The initial position of the lever arm 202 is parallel to the two pneumatic grippers. When the actuator 203 begins to extend, it pushes the lever arm 202 to form an angle with the two pneumatic grippers, causing both ends of the lever arm 202 to approach the two pneumatic grippers respectively, until the two pneumatic grippers begin to move away synchronously.

[0041] To further explain, the pneumatic gripper includes cavity walls 301, with the openings of two cavity walls 301 facing each other. In the initial state, the back-to-back ends of the two cavity walls 301 protrude from the housing 201, and air holes 302 are provided on the upper, lower, front, and rear sides, as well as on the back-to-back end faces of the two housings 201. Simultaneously, a tension spring 304 is fixed between the two cavity walls 301, maintaining their initial positions until the actuator 203 extends and the tension spring 304 begins to extend.

[0042] The contact point between the cavity wall 301 and the chamber 201 is a dynamic seal. At the same time, when the air gripper, or the cavity wall 301, passes through the inlet / outlet 102, there is a gap between the cavity wall 301 and the inner contour of the inlet / outlet 102 to create a soil discharge gap. This allows a small amount of soil to enter the outer cylinder 101 from the soil discharge gap due to the squeezing of the air gripper, so that the outer cylinder 101 can carry soil samples at a specified depth. At the same time, this design allows the air gripper to extend into the soil due to the loosening of the soil.

[0043] A second lifting ring 205 is fixed to the top of the hatch cover 204 for securing the steel cable or rope. If the upper end of the rope detaches from the lifting and lowering device, it can also be secured to the first lifting ring 105. At this time, the pneumatic gripper inserted into the soil, combined with the secured rope, maintains the height of the gas distribution chamber within the ventilation well. The gap between the closed pipe 206 and the external pipe 104 through which it passes allows for the supply of gas to the outer cylinder 101 via another external pipe 104, enabling long-term gas supply operations. The gas distribution chamber can maintain or stop gas supply operations; both can operate independently or in conjunction.

[0044] Specifically, limiting members 303 can be fixedly attached to the upper end of the cavity wall 301. The facing surfaces of the two limiting members 303 are convex arc surfaces, which changes the contact between the lever 202 and the cavity wall 301 to a state where the lever 202 remains in contact with the two limiting members 303, thereby indirectly extending the distance that the lever 202 can move between the two cavity walls 301. The back-to-back surfaces of the two limiting members 303 can abut against the inner wall of the cabin 201 to limit the maximum distance between the two cavity walls 301.

Claims

1. A soil environment aeration and improvement device, characterized in that, Includes a venting well and a gas distribution chamber that is fed into the venting well via a lifting and lowering device; The ventilation well includes an outer cylinder (101), with an inlet and outlet (102) distributed longitudinally on the upper part of the outer cylinder (101), and a cylinder cover (103) detachably connected to the top of the outer cylinder (101), with at least two air inlet positions provided on the cylinder cover (103). The air distribution chamber includes a chamber (201), and two air grippers with internal cavities are slidably connected inside the chamber (201). The two air grippers are driven by an actuator (203) to retract into the chamber (201) or extend out of the chamber (201). The air grippers are connected to the inside and outside of the chamber (201). The air grippers can pass through any one of the inlets (102) to extend into the soil. The upper end of the cabin (201) is fixedly connected to a cover (204) that closes its top. The upper end of the cover (204) is fixedly connected to and connected to a connecting pipe (206). The upper end of the connecting pipe (206) can pass through one of the air inlet positions. The air source can pass through the connecting pipe (206), the cabin (201), the air gripper and the soil in sequence.

2. The soil environment aeration and improvement device according to claim 1, characterized in that, It also includes PLC control. Pressure sensors and VOCs concentration sensors are arranged inside and outside the air distribution chamber. The pressure sensors and VOCs concentration sensors are electrically connected to the PLC controller through transmitters. The PLC controller is electrically connected to the lifting and releasing device, the actuator (203) and the variable frequency aerator respectively. The variable frequency aerator is connected to the connecting pipe (206) or the nearest position through pipeline.

3. The soil environment aeration and improvement device according to claim 1, characterized in that, The center of the nearest position through which the connecting pipe (206) passes coincides with the axis of the cabin (201).

4. The soil environment aeration and improvement device according to claim 1, characterized in that, One of the air intake positions is an external pipe (104) fixed and connected to the upper end of the cylinder cover (103). The connecting pipe (206) is wrapped with a protective layer. The outer skin of the protective layer is provided with a scale for depth and circumferential direction. Any mark of the scale can be aligned with the top surface of the external pipe (104) through which the connecting pipe (206) passes. The depth and circumferential direction of the inlet and outlet (102) match the depth and circumferential direction of the scale.

5. The soil environment aeration and improvement device according to claim 1, characterized in that, The cabin (201) has a lever (202) at its center. The lower and upper parts of the lever (202) are fixedly connected to shafts. The lower shaft is rotatably connected to the bottom of the cabin (201), and the upper shaft is rotatably connected to the cover (204). The axes of the two shafts coincide with the cabin (201). The actuator (203) is an electric linear actuator. The fixed end of the actuator (203) is fixed to the inner wall or bottom of the cabin (201). When the telescopic end extends or retracts, it always keeps in contact with the longitudinal surface of the lever (202). The lever (202) can push the two pneumatic grippers away from each other synchronously when rotating.

6. The soil environment aeration and improvement device according to claim 5, characterized in that, A limiter (303) is fixedly attached to the pneumatic gripper. The face-to-face surfaces of the two limiters (303) are arc surfaces convex to each other. After rotation, the lever (202) can maintain contact with the two arc surfaces, and the back-to-back surfaces of the two limiters (303) can abut against the inner wall of the cabin (201).

7. The soil environment aeration and improvement device according to claim 5 or 6, characterized in that, A tension spring (304) is fixed between the two pneumatic grippers, and the tension spring (304) maintains the initial position of the two pneumatic grippers.

8. The soil environment aeration and improvement device according to claim 1, characterized in that, The pneumatic gripper includes a cavity wall (301), with the openings of the two cavity walls (301) facing each other. In the initial state, the back-to-back end of the cavity wall (301) protrudes from the cabin (201), and air holes (302) are provided on the upper, lower, front, rear and the two back-to-back end faces of the protruding part.

9. The soil environment aeration and improvement device according to claim 1, characterized in that, The contact point between the pneumatic gripper and the cabin (201) is dynamically sealed. When the pneumatic gripper passes through the inlet / outlet (102), there is a gap between it and the inner contour of the inlet / outlet (102) to form a soil discharge gap.

10. The soil environment aeration and improvement device according to claim 1, characterized in that, A first lifting ring (105) is fixed to the inner wall of the outer cylinder (101), and a second lifting ring (205) is fixed to the top of the hatch cover (204).

Images