Small underground automatic gas production device

Abstract

The invention discloses a small underground automatic gas production device, and relates to the technical field of gas collection, the small underground automatic gas production device comprises a tank body, the inner wall of the tank body is fixedly connected with a layering plate used for dividing the interior of the tank body into an upper cavity and a lower cavity, and the upper surface of the layering plate is provided with a water filling assembly used for filling the lower cavity of the tank body with water resources. A communicating assembly is arranged in the lower cavity of the tank body and used for communicating liquid in the lower cavity of the tank body with underground water. When the tank body descends and sinks into underground water, water resources in the lower cavity of the tank body can be electrically controlled to make contact with the underground water through the communicating assembly, gas is collected through a water drainage and gas collection method, meanwhile, through the arrangement of the lower cavity and the upper cavity of the tank body, the integrated design of collection and collection can be achieved, and the collection efficiency is improved. And the influence on subsequent research on gas purity, components and the like due to contact and mixing with external gas after subsequent gas collection is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of gas collection, in particular to a small-sized underground automatic gas collection device. Background Art

[0002] Groundwater refers to the water stored in the rock pores below the ground. In a narrow sense, it refers to the water in the saturated aquifer below the groundwater surface.

[0003] In order to better understand the age of groundwater and the time scale of underground flow, tritium, carbon and noble gases such as helium and krypton contained in groundwater are usually collected. Through the concentration of different stable and radioactive isotope combinations, scientists can calculate the exact time when the water in the aquifer is replenished, how fast the groundwater flows and how long the replenishment takes.

[0004] For example, patent number CN107524425B discloses a portable underwater gas production device and its use method. The device is lowered into a water well and immersed in groundwater, and then the gas in the groundwater is collected using the drainage gas collection method. However, in actual use, it is impossible to know whether the device is just submerged in the water surface. After a long period of static operation, the gas collection status cannot be timely understood, which requires a high time cost. In addition, during the lowering process, the pulleys on both sides need to be twisted at a uniform speed, and the speed of the ropes on both sides should be as consistent as possible, while the rope connecting the lever should not be strained. This may cause the rope connecting the lever to move too fast and become tangled below the wellbore, making it impossible to open the piston, or cause the speed to be too slow, opening the piston prematurely, and failing to obtain gas from the target fault. At the same time, gas production and gas collection are divided into two steps, which is extremely cumbersome and easily causes the collected gas to mix with external gas, which has a certain impact on subsequent research on gas purity, composition, etc. To this end, we provide a small underground automatic gas production device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to make up for the shortcomings of the existing technology and provide a small-scale automatic underground gas production device. The device can not only facilitate the detection when the entire device is submerged in water, and monitor the progress of gas collection in real time, but also unify gas collection and gas collection operations to improve collection efficiency, and collect gas by adopting electric control to avoid improper operation problems caused by manual operation.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a small-scale automatic downhole gas extraction device, comprising a tank body, the inner wall of which is fixedly connected to a layered plate for dividing the inner part of the tank body into an upper chamber and a lower chamber, and the upper surface of the layered plate is provided with a water filling component for filling the lower chamber of the tank body with water resources.

[0007] The lower chamber of the tank body is provided with a connecting component, which is used to connect the liquid in the lower chamber of the tank body with the groundwater. The bottom surface of the layered plate is provided with a collecting component, which is used to transmit the gas collected in the lower chamber of the tank body to the upper chamber of the tank body.

[0008] The outer surface of the tank body is provided with a detection component, which is used to detect the water level of the water resources in the lower cavity of the tank body and the depth of the tank body submerged in the groundwater; the outside of the tank body is provided with a retractable component for raising and lowering the tank body in the water well.

[0009] Furthermore, the water filling assembly includes a water filling pipe fixedly connected to the reserved holes on the upper surface of the layered plate, and a one-way water inlet valve installed at the lower end of the water filling pipe and located in the lower cavity of the tank body. The upper end of the water filling pipe passes through the inner top wall of the tank body and extends to the upper part of the tank body. By setting up the water filling assembly, it is convenient to fill the lower cavity of the tank body with water resources, so as to facilitate the subsequent replacement of the gas in the groundwater by the drainage and gas collection method. However, when filling the lower cavity of the tank body with water resources, the lower cavity of the tank body needs to be filled up to avoid residual gas in the lower cavity of the tank body.

[0010] Furthermore, the water filling assembly also includes a one-way exhaust valve tube installed in a reserved hole on the upper surface of the layered plate and connected to the lower cavity of the tank body, and the outer end of the one-way exhaust valve tube passes through the inner wall of the tank body and extends to the outside of the tank body. By setting up the water filling assembly and the one-way exhaust valve tube in the water filling assembly, it is convenient for the gas in the lower cavity of the tank body to be discharged outward through the one-way exhaust valve tube when filling water into the lower cavity of the tank body, thereby ensuring that water resources are filled into the lower cavity of the tank body.

[0011] Furthermore, the connecting component includes a piston in contact with the reserved groove on the bottom wall of the tank body, and the outer surface of the piston is provided with a sealing ring in contact with the reserved groove on the bottom wall of the tank body. By setting the connecting component, the setting of the piston in the connecting component can facilitate contact with the reserved groove on the bottom wall of the tank body, and because the piston is trapezoidal in design, it can facilitate close contact and sealing with the reserved hole on the bottom wall of the tank body.

[0012] Furthermore, the connecting component also includes a connecting frame fixedly connected to the lower end of the tank body, and an electric push rod is installed on the inner bottom wall of the connecting frame. The output end of the electric push rod is fixedly connected to the bottom surface of the piston. By setting the connecting component and the setting of the connecting frame in the connecting component, it is convenient to support and install the electric push rod. By starting the electric push rod, the piston can be pushed to separate from the reserved groove on the inner bottom wall of the tank body, so that the water resources in the lower cavity of the tank body can come into contact with the groundwater, and the gas in the groundwater can be collected by using the drainage gas collection method.

[0013] Furthermore, the collection component includes an air pressure sensor installed on the bottom surface of the layered plate, and a ventilation solenoid valve installed in a reserved hole on the upper surface of the layered plate, and the ventilation solenoid valve is used to transfer the gas collected in the lower cavity of the tank body to the upper cavity of the tank body; the collection component also includes an exhaust valve installed in a reserved hole on the upper surface of the tank body, and the exhaust valve is used to extract the gas in the upper cavity of the tank body. By setting up the collection component, after the tank body is submerged in groundwater and the connecting component is opened, the water resources in the lower cavity of the tank body can be brought into contact with the groundwater, and because the groundwater contains a variety of gases, when the tank body is stationary in the groundwater, the drainage and gas collection method can be used to replace the gas in the groundwater with the water resources in the lower cavity of the tank body, so that the gas can enter the lower cavity of the tank body.

[0014] Furthermore, the detection component includes a water level sensor installed on the upper surface of the tank body, and a hydraulic sensor installed on the bottom surface of the tank body. The detection end of the hydraulic sensor passes through the bottom surface of the tank body and is located inside the lower cavity of the tank body. The detection component also includes a transparent scale bar arranged on the outer surface of the tank body. The transparent scale bar is used to observe the storage amount of water resources in the lower cavity of the tank body. By setting up the detection component, when the tank body is submerged in groundwater, the groundwater contacts the water level sensor, causing the water level sensor to send a signal and transmit the signal to the operator's operating device, thereby making it easier for the operator to understand that the tank body is completely submerged in groundwater, so as to facilitate closing the retractable component.

[0015] Furthermore, the retractable assembly includes a connecting frame fixed on the outer surface of the tank body, and a connecting rod connected to the connecting frame. By setting up the retractable assembly, the setting of the connecting frame inside the retractable assembly can facilitate connection with the driving component, thereby facilitating the tank body to be placed into the water well.

[0016] Furthermore, the retractable assembly also includes a placement frame located outside the tank body, and two fixed plates fixed on the upper surface of the placement frame. A winding roller is installed on the side of the two fixed plates close to each other, and the outer surface of the winding roller is wound with a steel cable connected to the connecting rod. By setting up the retractable assembly, the setting of the placement frame in the retractable assembly can be conveniently placed directly above the water well, thereby facilitating the subsequent operation of placing the tank body into the water well, and the setting of the winding roller and the steel cable can facilitate connection with the connecting frame and the connecting rod, thereby placing the tank body into the water well.

[0017] Furthermore, the upper surface of the placement frame is provided with a hole for the steel cable to pass through, and the outer surface of the fixed plate is installed with a servo motor for driving the winding roller to rotate. By setting the hole, the steel cable can be easily passed through, and the setting of the servo motor can easily drive the winding roller to rotate, so that the winding roller can drive the steel cable to lift the tank body, thereby facilitating the placement of the tank body into the water well to collect gas in the groundwater.

[0018] Compared with the existing technology, this small underground automatic gas production device has the following beneficial effects:

[0019] 1. When the tank body is lowered and immersed in groundwater, the present invention can electrically control the contact between the water resources in the lower cavity of the tank body and the groundwater through the connecting component, and collect the gas by using the drainage gas collection method. At the same time, the setting of the lower cavity and the upper cavity of the tank body can realize the integrated design of collection and collection, avoiding the subsequent contact and mixing of the gas with the external gas during the collection and collection, which affects the subsequent research on the purity and composition of the gas.

[0020] 2. The present invention is capable of injecting external water resources into the lower cavity of the tank body by setting a water injection component, so as to facilitate the subsequent collection of gas in the groundwater by the drainage gas collection method. Before the tank body is lowered into the water well, the upper cavity of the tank body needs to be evacuated to a vacuum to facilitate the subsequent collection of groundwater gas.

[0021] 3. The present invention has a retractable component, which eliminates the need to manually place the tank body into the well. When the tank body descends into the groundwater and submerges into the water surface, the detection component can detect whether the tank body is just submerged in the groundwater, and collect groundwater gas through the drainage gas collection method during the static process. The detection component can also monitor the remaining water resources in the lower cavity of the tank body at all times, so as to intuitively understand the progress of groundwater gas collection in the lower cavity of the tank body and reduce unnecessary waiting time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the overall device of the present invention;

[0023] Figure 2 This is a front view of the three-dimensional structure of the tank body of the present invention;

[0024] Figure 3 The three-dimensional structure of the tank body of the present invention is cut away Figure 1 ;

[0025] Figure 4 The three-dimensional structure of the tank body of the present invention is cut away Figure 2 ;

[0026] Figure 5 Schematic diagram of the three-dimensional structure of the water level sensor of the present invention;

[0027] Figure 6 Schematic diagram of the three-dimensional structure of the connecting component of the present invention;

[0028] Figure 7 For the present invention Figure 3 A local enlarged schematic diagram of point A in the middle.

[0029] In the figure: 1. Tank body; 2. Layer plate; 3. Water filling pipe; 4. One-way water inlet valve; 5. One-way exhaust valve pipe; 6. Piston; 7. Sealing ring; 8. Connecting frame; 9. Electric push rod; 10. Air pressure sensor; 11. Ventilation solenoid valve; 12. Air extraction valve; 13. Water level sensor; 14. Hydraulic sensor; 15. Transparent scale bar; 16. Connecting frame; 17. Connecting rod; 18. Placement frame; 19. Fixing plate; 20. Winding roller; 21. Steel cable; 22. Hole; 23. Servo motor. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0031] As described in the background technology, in the existing technology, groundwater gas collection is relatively cumbersome, and it is impossible to intuitively observe the progress of gas collection and whether the device is submerged in the water surface. At the same time, gas collection and gas collection are divided into two steps, which easily causes the collected gas to mix with external gas during transmission, affecting subsequent research on gas purity and composition. For this reason, this embodiment provides a small-scale downhole automatic gas collection device, which can not only facilitate the detection of when the entire device is submerged in the water surface, and monitor the progress of gas collection in real time, but also can unify gas collection and gas collection operations to improve collection efficiency, and avoid improper operation caused by manual operation by adopting electric control for gas collection.

[0032] See also Figure 1 - Figure 7 This embodiment proposes a small-scale automatic downhole gas extraction device, including a tank body 1, the inner wall of which is fixedly connected to a layered plate 2 for dividing the interior of the tank body 1 into an upper chamber and a lower chamber, and the upper surface of the layered plate 2 is provided with a water filling component for filling the lower chamber of the tank body 1 with water resources.

[0033] The setting of the water filling component requires that external water resources be poured into the lower cavity of the tank body 1 before lowering the tank body 1 into the water well, and the water resources fully fill the lower cavity of the tank body 1, ensuring that only water resources remain in the lower cavity of the tank body 1, thereby ensuring that the water resources are subsequently replaced with the gas in the groundwater through the drainage and gas collection method, thereby collecting the gas in the groundwater.

[0034] The water filling assembly includes a water filling pipe 3 fixedly connected to the reserved hole on the upper surface of the layered plate 2, and a one-way water inlet valve 4 installed at the lower end of the water filling pipe 3 and located in the lower cavity of the tank body 1. The upper end of the water filling pipe 3 passes through the inner top wall of the tank body 1 and extends to the upper part of the tank body 1.

[0035] By setting up a water filling component, it is convenient to fill the lower cavity of the tank body 1 with water resources, so as to facilitate the subsequent replacement of the gas in the groundwater using the drainage and gas collection method. However, when filling the lower cavity of the tank body 1 with water resources, the lower cavity of the tank body 1 needs to be filled to avoid residual gas in the lower cavity of the tank body 1.

[0036] In addition, when filling the lower cavity of the tank body 1 with water, it is necessary to fill the water into the lower cavity of the tank body 1 in one direction through the water filling pipe 3 and the one-way water inlet valve 4, and the water resources will be sealed and limited by the one-way water inlet valve 4, so that the water resources in the lower cavity of the tank body 1 will not leak, ensuring that the lower cavity of the tank body 1 is a closed space.

[0037] The water filling assembly also includes a one-way exhaust valve pipe 5 installed in a reserved hole on the upper surface of the layered plate 2 and connected to the lower cavity of the tank body 1, and the outer end of the one-way exhaust valve pipe 5 passes through the inner wall of the tank body 1 and extends to the outside of the tank body 1.

[0038] By setting up a water filling assembly and a one-way exhaust valve pipe 5 in the water filling assembly, it is convenient for the gas in the lower cavity of the tank body 1 to be discharged outward through the one-way exhaust valve pipe 5 when filling water into the lower cavity of the tank body 1, thereby ensuring that water is filled into the lower cavity of the tank body 1.

[0039] As a supplement, the one-way exhaust valve tube 5 is manually closed and opened, which can avoid the risk of gas leakage from the one-way exhaust valve tube 5 when collecting groundwater gas in the lower cavity of the tank body 1.

[0040] The lower chamber of the tank body 1 is provided with a connecting component, which is used to connect the liquid in the lower chamber of the tank body 1 with the groundwater. The bottom surface of the layered plate 2 is provided with a collecting component, which is used to transmit the gas collected in the lower chamber of the tank body 1 to the upper chamber of the tank body 1.

[0041] The setting of the connecting component can, after the tank body 1 is submerged in groundwater, open the connecting component to allow the water resources in the lower cavity of the tank body 1 to come into contact with the groundwater. The gas contained in the groundwater can cause the tank body 1 to float up when it is stationary in the groundwater. The gas can be replaced with the water resources reserved in the lower cavity of the tank body 1 and enter the lower cavity of the tank body 1. The water resources in the lower cavity of the tank body 1 will flow into the groundwater. This is the drainage and gas collection method.

[0042] As a supplement, the water resources in the lower cavity of the tank body 1 will flow with the groundwater, so that the water resources in the lower cavity of the tank body 1 can slowly flow out of the lower cavity of the tank body 1, and as the water resources in the lower cavity flow out, the gas in the groundwater is collected in the lower cavity of the tank body 1, and then after standing for a suitable period of time, the gas content in the lower cavity of the tank body 1 will increase, and then the groundwater can be collected for gas.

[0043] The communication component includes a piston 6 that contacts the reserved groove on the inner bottom wall of the tank body 1 , and a sealing ring 7 that contacts the reserved groove on the inner bottom wall of the tank body 1 is sleeved on the outer surface of the piston 6 .

[0044] By setting up a connecting component, the setting of the piston 6 in the connecting component can facilitate contact with the reserved groove on the inner bottom wall of the tank body 1, and because the piston 6 is trapezoidal in design, it can facilitate close contact and sealing with the reserved hole on the inner bottom wall of the tank body 1.

[0045] As a supplement, the setting of the sealing ring 7 can further improve the sealing performance of the connection between the piston 6 and the reserved groove on the bottom wall of the tank body 1, thereby preventing the leakage of groundwater gas collected in the lower cavity of the tank body 1. In order to improve the sealing performance, you can apply butter or the like to improve the sealing performance.

[0046] The connecting component also includes a connecting frame 8 fixedly connected to the lower end of the tank body 1, and an electric push rod 9 is installed on the inner bottom wall of the connecting frame 8. The output end of the electric push rod 9 is fixedly connected to the bottom surface of the piston 6. By setting the connecting component and the setting of the connecting frame 8 in the connecting component, it is convenient to support and install the electric push rod 9. By starting the electric push rod 9, the piston 6 can be pushed to separate from the reserved groove on the inner bottom wall of the tank body 1, so that the water resources in the lower cavity of the tank body 1 can come into contact with the groundwater, and the gas in the groundwater can be collected by using the drainage gas collection method.

[0047] In addition, the connecting component can only be opened when the tank body 1 is completely submerged in groundwater, to avoid opening it after the gas in the groundwater is collected, causing the external gas to mix with the groundwater gas, thereby affecting the subsequent analysis of the groundwater gas.

[0048] The collection component includes an air pressure sensor 10 installed on the bottom surface of the layered plate 2, and a ventilation solenoid valve 11 installed in a reserved hole on the upper surface of the layered plate 2. The ventilation solenoid valve 11 is used to transfer the gas collected in the lower cavity of the tank body 1 to the upper cavity of the tank body 1; the collection component also includes an exhaust valve 12 installed in a reserved hole on the upper surface of the tank body 1. The exhaust valve 12 is used to extract the gas in the upper cavity of the tank body 1.

[0049] By setting up a collection component, after the tank body 1 is submerged in groundwater and the connecting component is opened, the water resources in the lower cavity of the tank body 1 can come into contact with the groundwater. Since the groundwater contains a variety of gases, when the tank body 1 is stationary in the groundwater, the drainage gas collection method can be used to replace the gas in the groundwater with the water resources in the lower cavity of the tank body 1, so that the gas can enter the lower cavity of the tank body 1.

[0050] As a supplement, the air pressure sensor 10 detects the changes in the gas in the lower cavity of the tank body 1. When the air pressure change reaches the set threshold, it can transmit the signal to the air extraction valve 12, and open the air extraction valve 12 to transfer the gas collected in the lower cavity of the tank body 1 to the upper cavity of the tank body 1 for storage.

[0051] A detection component is provided on the outer surface of the tank body 1, which is used to detect the water level of the water resources in the lower cavity of the tank body 1 and the depth of the tank body 1 immersed in the groundwater; a retraction component is provided on the outside of the tank body 1 for raising and lowering the tank body 1 in the water well.

[0052] The setting of the detection component can detect the position where the tank body 1 is just immersed in the groundwater when the retractable component lowers the tank body 1 into the groundwater, and thus transmit the signal to the operator for remote control and observation through the PLC programmable logic controller set up in the detection component.

[0053] As a supplement, the detection component can also detect the storage amount of water resources in the lower cavity of the tank body 1 at all times, so that as the water resources in the lower cavity of the tank body 1 decrease, it can ensure that the operator understands the progress of collecting gas in the groundwater and reduce unnecessary time waste.

[0054] The detection component includes a water level sensor 13 installed on the upper surface of the tank body 1, and a hydraulic sensor 14 installed on the bottom surface of the tank body 1. The detection end of the hydraulic sensor 14 passes through the bottom surface of the tank body 1 and is located inside the lower cavity of the tank body 1. The detection component also includes a transparent scale bar 15 arranged on the outer surface of the tank body 1. The transparent scale bar 15 is used to observe the storage amount of water resources in the lower cavity of the tank body 1. By setting up the detection component, when the tank body 1 is submerged in groundwater, the groundwater contacts the water level sensor 13, causing the water level sensor 13 to send a signal and transmit the signal to the operator's hand. This makes it easier for the operator to understand that the tank body 1 is completely submerged in groundwater, so as to close the retractable component.

[0055] As a supplement, the setting of the hydraulic sensor 14 can facilitate the constant monitoring of the stock of reserved water resources in the lower cavity of the tank body 1, so as to understand the progress of groundwater gas collection in the lower cavity of the tank body 1. As the water resources in the lower cavity of the tank body 1 decrease, the hydraulic sensor 14 can sense the decrease in the pressure of the water resources in the lower cavity of the tank body 1, and then understand the progress of groundwater gas collection. In addition, the setting of the transparent scale bar 15 can intuitively observe whether the water resources in the lower cavity of the tank body 1 are full when filling the lower cavity of the tank body 1 with water resources.

[0056] The retractable assembly includes a connecting frame 16 fixed on the outer surface of the tank body 1, and a connecting rod 17 connected to the connecting frame 16. By setting up the retractable assembly, the setting of the connecting frame 16 in the retractable assembly can facilitate connection with the driving component, thereby facilitating the tank body 1 to be placed into the water well.

[0057] The retractable assembly also includes a placement frame 18 located outside the tank body 1, and two fixed plates 19 fixed on the upper surface of the placement frame 18. A winding roller 20 is installed on the side of the two fixed plates 19 close to each other, and the outer surface of the winding roller 20 is wrapped with a steel cable 21 connected to the connecting rod 17.

[0058] By setting up the retractable assembly, the placement frame 18 in the retractable assembly can be easily placed directly above the water well, thereby facilitating the subsequent operation of placing the tank body 1 into the water well, and the setting of the winding roller 20 and the steel cable 21 can facilitate connection with the connecting frame 16 and the connecting rod 17, thereby placing the tank body 1 into the water well.

[0059] As a supplement, the setting of the winding roller 20 can facilitate the subsequent driving component to drive the winding roller 20 to rotate, so that the winding roller 20 can reel in or drop the steel cable 21, thereby dropping the tank body 1 into the water well.

[0060] A hole 22 for the steel cable 21 to pass through is formed on the upper surface of the placement frame 18 , and a servo motor 23 for driving the winding roller 20 to rotate is mounted on the outer surface of the fixing plate 19 .

[0061] By setting the hole 22, the steel cable 21 can be easily passed through, and the setting of the servo motor 23 can easily drive the winding roller 20 to rotate, so that the winding roller 20 can drive the steel cable 21 to lift the tank body 1, thereby facilitating the tank body 1 to be placed in the water well to collect gas in the groundwater.

[0062] In addition, the air pressure sensor 10, water level sensor 13 and hydraulic pressure sensor 14 in the present invention are all conventional equipment purchased on the market and known to those skilled in the art. The models can be selected or customized according to actual needs. For those skilled in the art, their setting methods, installation methods and electrical connection methods only need to be debugged according to the requirements of their instruction manuals, and will not be described in detail here.

[0063] Working principle: When collecting gas from groundwater, first place the entire device directly above the water well, so that the tank body 1 is located at the upper part of the water well, and pour external water resources into the lower cavity of the tank body 1 through the water filling pipe 3 and the one-way water inlet valve 4, and make the water resources fully fill the lower cavity of the tank body 1. When the water resources fill the lower cavity of the tank body 1, it is necessary to manually open the one-way exhaust valve pipe 5 to facilitate the discharge of the gas in the lower cavity of the tank body 1, thereby ensuring that the lower cavity of the tank body 1 contains only water resources and avoids gas. After the water resources are filled, the one-way exhaust valve pipe 5 needs to be closed.

[0064] After the water resources in the lower cavity of the tank body 1 are filled, an air pump is used to connect with the air extraction valve 12, and the gas in the upper cavity of the tank body 1 is extracted to keep the upper cavity of the tank body 1 in a vacuum state, so as to facilitate the subsequent collection of groundwater gas.

[0065] At this time, the servo motor 23 is started, and the output shaft of the servo motor 23 drives the winding roller 20 to rotate, so that the winding roller 20 drives the steel cable 21 to lower the tank body 1 into the water well. After the tank body 1 is submerged in the groundwater, the water resource can be detected by the water level sensor 13, thereby transmitting the signal to the operator's operating device and turning off the servo motor 23 to ensure that the tank body 1 is just submerged in the groundwater. The operator can remotely control and start the electric push rod 9 through the operator in his hand. The electric push rod 9 can push the piston 6 to rise, so that the water resource in the lower cavity of the tank body 1 is connected with the groundwater, and the gas contained in the groundwater is replaced with the water resource in the lower cavity of the tank body 1 through the drainage and gas collection method, so that the gas can enter the lower cavity of the tank body 1, and as the gas in the lower cavity of the tank body 1 increases, the tank The air pressure in the lower chamber of the tank body 1 changes. When the air pressure reaches a certain value, the air pressure sensor 10 can receive a signal and control the opening of the ventilation solenoid valve 11, so that the gas in the lower chamber of the tank body 1 is transmitted to the upper chamber of the tank body 1 for collection. When the water resources in the lower chamber of the tank body 1 are reduced, it can be monitored in real time by the hydraulic sensor 14. When the water resources in the tank body 1 are reduced to the bottom, the hydraulic sensor 14 can transmit a signal to the operator's operator and the electric push rod 9, and control the electric push rod 9 to pull back the piston 6, so that the piston 6 closes the lower chamber of the tank body 1, and the operator can pull the tank body 1 out of the water well through the servo motor 23, thereby completing the collection of gas in the groundwater, and can also use the exhaust valve 12 to transport the collected gas to an external storage container.

Claims

1. A small-sized automatic downhole gas extraction device, comprising a tank (1), characterized in that: The inner wall of the tank body (1) is fixedly connected to a layered plate (2) for dividing the interior of the tank body (1) into an upper chamber and a lower chamber, and the upper surface of the layered plate (2) is provided with a water filling component for filling the lower chamber of the tank body (1) with water resources; The lower chamber of the tank body (1) is provided with a communication component, the communication component is used to communicate between the liquid in the lower chamber of the tank body (1) and the groundwater, and the bottom surface of the layered plate (2) is provided with a collection component, the collection component is used to transmit the gas collected in the lower chamber of the tank body (1) to the upper chamber of the tank body (1); The outer surface of the tank body (1) is provided with a detection component, which is used to detect the water level of the water resources in the lower cavity of the tank body (1) and the depth of the tank body (1) immersed in the groundwater; the outside of the tank body (1) is provided with a retractable component for raising and lowering the tank body (1) in the water well.

2. A small-sized automatic downhole gas extraction device according to claim 1, characterized in that: The water filling assembly comprises a water filling pipe (3) fixedly connected to a reserved hole on the upper surface of the layered plate (2), and a one-way water inlet valve (4) installed at the lower end of the water filling pipe (3) and located in the lower cavity of the tank body (1); the upper end of the water filling pipe (3) passes through the inner top wall of the tank body (1) and extends to the upper part of the tank body (1).

3. The small-sized automatic downhole gas extraction device according to claim 1, characterized in that: The water filling assembly further comprises a one-way exhaust valve pipe (5) installed in a reserved hole on the upper surface of the layered plate (2) and connected to the lower cavity of the tank body (1), and the outer end of the one-way exhaust valve pipe (5) penetrates the inner wall of the tank body (1) and extends to the outside of the tank body (1).

4. A small-sized automatic downhole gas extraction device according to claim 1, characterized in that: The communication component comprises a piston (6) in contact with a reserved groove on the inner bottom wall of the tank body (1), and the outer surface of the piston (6) is sleeved with a sealing ring (7) in contact with the reserved groove on the inner bottom wall of the tank body (1).

5. A small-sized automatic underground gas extraction device according to claim 4, characterized in that: The communication component further comprises a connection frame (8) fixedly connected to the lower end of the tank body (1), and an electric push rod (9) is installed on the inner bottom wall of the connection frame (8), and the output end of the electric push rod (9) is fixedly connected to the bottom surface of the piston (6).

6. The small-sized automatic underground gas production device according to claim 1, characterized in that: The collection component comprises an air pressure sensor (10) mounted on the bottom surface of the layered plate (2), and a ventilation solenoid valve (11) mounted in a reserved hole on the upper surface of the layered plate (2), wherein the ventilation solenoid valve (11) is used to transmit the gas collected in the lower cavity of the tank body (1) to the upper cavity of the tank body (1); the collection component further comprises an air extraction valve (12) mounted in a reserved hole on the upper surface of the tank body (1), wherein the air extraction valve (12) is used to extract the gas in the upper cavity of the tank body (1).

7. The small-sized automatic downhole gas extraction device according to claim 1, characterized in that: The detection assembly comprises a water level sensor (13) mounted on the upper surface of the tank body (1), and a hydraulic pressure sensor (14) mounted on the bottom surface of the tank body (1), wherein a detection end of the hydraulic pressure sensor (14) passes through the bottom surface of the tank body (1) and is located inside the lower cavity of the tank body (1). The detection assembly further comprises a transparent scale bar (15) arranged on the outer surface of the tank body (1), wherein the transparent scale bar (15) is used to observe the storage amount of water resources in the lower cavity of the tank body (1).

8. The small-sized automatic downhole gas extraction device according to claim 1, characterized in that: The retractable assembly comprises a connecting frame (16) fixed on the outer surface of the tank body (1), and a connecting rod (17) connected to the connecting frame (16).

9. The small-sized automatic downhole gas extraction device according to claim 8, characterized in that: The retractable assembly further comprises a placement frame (18) located outside the tank body (1), and two fixing plates (19) fixed on the upper surface of the placement frame (18); a winding roller (20) is installed on a side of the two fixing plates (19) close to each other, and a steel cable (21) connected to the connecting rod (17) is wound around the outer surface of the winding roller (20).

10. A small-sized automatic underground gas production device according to claim 9, characterized in that: The upper surface of the placement frame (18) is provided with a hole (22) for the steel cable (21) to pass through, and the outer surface of the fixing plate (19) is provided with a servo motor (23) for driving the winding roller (20) to rotate.

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