Waterproof device and method for gas geochemical exploration

Abstract

The invention discloses a waterproof device and method for gas geochemical exploration equipment, and the waterproof device comprises a waterproof pipeline which is communicated with the gas geochemical exploration equipment, a water level sensor and an electromagnetic valve group are sequentially arranged above a gas inlet of the waterproof pipeline, and the waterproof device also comprises a gas pump which is connected with the electromagnetic valve group; the waterproof device is further provided with a microcontroller. When the water level sensor senses that the water level in the waterproof pipeline is within a first preset range, the microprocessor controls the electromagnetic valve group to form a forward gas path, and gas enters the gas geochemical exploration equipment from the gas inlet through the forward gas path under the action of the gas pump; when the water level sensor senses that the water level in the waterproof pipeline is within a second preset range, the microprocessor controls the electromagnetic valve set to form a reverse gas path, and gas discharges water in the waterproof pipeline from the gas inlet through the reverse gas path under the action of the gas pump. According to the invention, automatic drainage of the exploration equipment can be realized.

Description

Technical Field

[0001] The present invention relates to the field of mineral exploration machinery and equipment, and particularly to a waterproof device and method for gas geochemical exploration. Background Art

[0002] Gas geochemical survey refers to a geochemical exploration method that aims to discover gas anomalies for mineral exploration and other purposes by systematically collecting gas samples in the lithosphere, hydrosphere, and atmosphere, and analyzing the chemical composition and other geochemical characteristics of the gases.

[0003] In engineering practice, the analysis of gas components can be completed in a laboratory or using portable equipment in the field. When using portable equipment for measurement, first, a hole about 1 meter deep is drilled on the surface of the sampling point, and then an air pump is used to extract the gas to an electrochemical sensor to measure the concentration value. If the soil in the working area is rich in moisture, especially when the sampling point is close to rivers or lakes, there is often accumulated water in the hole at the sampling point, which will be drawn into the sensor together during sampling, causing damage to the sensor due to water ingress.

[0004] To solve this problem, a PTFE membrane is usually installed on the air pipe to prevent liquid water from entering the equipment. The PTFE membrane is a microporous film produced by special processes such as premixing, extrusion, calendering, and biaxial stretching using polytetrafluoroethylene dispersion resin. It has a fibrillar microporous structure, a porosity of more than 85%, about 1.4 billion micropores per square centimeter, and a pore diameter range of 0.02 μm - 15 μm. Since the micropore diameter is smaller than the diameter of water molecules (20 μm - 100 μm) and larger than the diameter of water vapor molecules (0.0003 μm - 0.0004 μm), water vapor can pass through while water droplets cannot, and excellent waterproof and moisture-permeable functions can be achieved using this microporous structure.

[0005] However, although using a PTFE membrane can prevent liquid water from entering the equipment, there are still many inconveniences: equipment operators cannot know that the air pipe has water ingress for further processing unless they observe the air pipe with the naked eye; operators must remove the water-filled air pipe and the PTFE membrane to drain the water. And due to the above reasons, the water ingress problem must be supervised and processed manually, increasing the workload. Summary of the Invention

[0006] The main objective of the present invention is to provide a waterproof device and method for gas geochemical exploration that can automatically pump water.

[0007] The technical solution adopted by the present invention is:

[0008] A waterproof device for a gas geochemical exploration device is provided, which includes a waterproof pipeline connected to the gas geochemical exploration device. Above the air inlet of the waterproof pipeline, a water level sensor and a solenoid valve group are successively arranged. The waterproof device also includes an air pump connected to the solenoid valve group. The waterproof device also has a microcontroller. One signal input port of the microcontroller is connected to the water level sensor. The microprocessor is connected to the solenoid valve group through a first switch and to the air pump through a second switch.

[0009] When the water level sensor senses that the water level in the waterproof pipeline is within a first preset range, the microprocessor controls the first switch to disconnect and the second switch to close through a first signal output port. The solenoid valve group is de-energized, forming a forward gas path. The gas enters the gas geochemical exploration device from the air inlet through the forward gas path under the action of the air pump.

[0010] When the water level sensor senses that the water level in the waterproof pipeline is within a second preset range, the microprocessor controls the first switch to close and the second switch to close. The solenoid valve group is energized, forming a reverse gas path. The gas discharges the water in the waterproof pipeline from the air inlet through the reverse gas path under the action of the air pump.

[0011] According to the above technical solution, both the first switch and the second switch are relays.

[0012] According to the above technical solution, the solenoid valve group includes a first electromagnetic gas valve and a second electromagnetic gas valve, both of which are two-position three-way electromagnetic gas valves. When the first switch is off, the solenoid valve group is de-energized and in an open state. When the first switch is on, the solenoid valve group is energized and in a closed state.

[0013] According to the above technical solution, when the solenoid valve group fails and cannot form a reverse gas path, as the water level rises and the water level sensor senses that the water level in the waterproof pipeline is within a third preset range, the microprocessor controls the second switch to disconnect and the air pump is powered off and stops operating.

[0014] According to the above technical solution, the water level sensor is a resistive water level sensor.

[0015] According to the above technical solution, the waterproof pipeline is connected to the gas sensor in the gas geochemical exploration device.

[0016] According to the above technical solution, the air pump and the solenoid valve group are connected by a silica gel hose.

[0017] The present invention also provides a gas geochemical exploration device, which includes a gas sensor, and the gas sensor is connected to the waterproof device described in the above technical solution.

[0018] The present invention also provides a waterproof method for a gas geochemical exploration device, which is based on the waterproof device described in the above technical solution and includes the following steps:

[0019] In use, the air inlet of the waterproof pipeline is placed in the surface hole of the sampling point;

[0020] When the water level sensor senses the water level in the waterproof pipeline, it sends the sensing signal to the microprocessor;

[0021] The microprocessor generates a corresponding voltage signal according to the sensing signal;

[0022] When the voltage signal is within the first preset voltage range, a low level is output through the first signal output port to control the first switch to open, the solenoid valve group is de-energized, a forward gas path is formed, a high level is output through the second signal output port to control the second switch to close, and the gas enters the gas geochemical exploration equipment from the air inlet through the forward gas path under the action of the air pump;

[0023] When the voltage signal is within the second preset voltage range, a high level is output through the first signal output port to control the first switch to close, the solenoid valve group is energized, a reverse gas path is formed, a high level is output through the second signal output port to control the second switch to close, and the gas discharges the water in the waterproof pipeline from the air inlet through the reverse gas path under the action of the air pump.

[0024] According to the above technical solution, it further includes the steps:

[0025] In case of an accident, when the solenoid valve group fails and a reverse gas path cannot be formed, the water level rises. When the voltage signal generated according to the sensing signal is within the third preset voltage range, the microprocessor outputs a low level through the second signal output port to control the second switch to open, and the air pump is powered off and stops running.

[0026] The beneficial effects of the present invention are as follows: The present invention provides an automatic waterproof device for gas geochemical exploration equipment. By setting a water level sensor and a solenoid valve group, when the water level is within different ranges, a forward gas path or a reverse gas path is formed by controlling the opening and closing of the solenoid valve group through the microprocessor. When the reverse gas path is formed, the water in the waterproof pipeline can be automatically discharged directly without manual intervention, protecting the equipment without increasing the workload of personnel.

[0027] Furthermore, in case of an accident, when the solenoid valve group fails and a reverse gas path cannot be formed, the water level rises. When the voltage signal generated according to the sensing signal is within the third preset voltage range, the microprocessor outputs a low level through the second signal output port to control the second switch to open, and the air pump is powered off and stops running, preventing the water level from rising further and damaging the gas sensor.

[0028] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 is a schematic structural diagram of the waterproof device for the gas geochemical exploration equipment in the embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of the two-way three-way electromagnetic gas valve in the embodiment of the present invention;

[0032] Figure 3 is a schematic structural diagram of the air pump connecting the solenoid valve group in the embodiment of the present invention;

[0033] Figure 4 is a schematic structural diagram of the forward gas path in the embodiment of the present invention;

[0034] Figure 5 is a schematic structural diagram of the reverse gas path in the embodiment of the present invention;

[0035] Figure 6 is a schematic circuit diagram of the waterproof device in the embodiment of the present invention;

[0036] Figure 7 is a physical diagram of the waterproof device for the gas geochemical exploration equipment in the embodiment of the present invention. Detailed implementation manners

[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further details the present invention in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] It should be noted that the diagrams provided in the embodiments of the present invention only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0039] In the present invention, it should also be noted that terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be construed as a limitation to the present application. In addition, terms such as "first" and "second" are only used for descriptive and distinguishing purposes and cannot be construed as indicating or implying relative importance.

[0040] The waterproof device for gas geochemical exploration of the present invention can achieve intelligent water ingress detection and drainage when using gas geochemical exploration equipment, and can automatically drain the water entering the gas pipe of the gas geochemical exploration equipment, achieving the protection of the equipment without increasing the manual workload.

[0041] As Figure 1 shown, the waterproof device for gas geochemical exploration equipment of the present invention includes a waterproof pipeline, one end of which is an air outlet, connected to the gas geochemical exploration equipment (such as connected to the gas sensor of the equipment). The other end of the waterproof pipeline is an air inlet, and a water level sensor and a solenoid valve group are sequentially arranged above the air inlet. The waterproof device also includes an air pump, connected to the solenoid valve group; the waterproof device also has a microcontroller, a signal input port of the microcontroller is connected to the water level sensor, and the microprocessor is connected to the solenoid valve group through a first switch and to the air pump through a second switch.

[0042] When the water level sensor senses that the water level in the waterproof pipeline is within the first preset range, the microprocessor controls the first switch to be disconnected and the second switch to be closed through the first signal output port. The solenoid valve group is not powered on, forming a forward gas path, and the gas enters the gas geochemical exploration equipment from the air inlet through the forward gas path under the action of the air pump.

[0043] When the water level sensor senses that the water level in the waterproof pipeline is within the second preset range, the microprocessor controls the first switch to be closed and the second switch to be closed. The solenoid valve group is powered on, forming a reverse gas path, and the gas discharges the water in the waterproof pipeline from the air inlet through the reverse gas path under the action of the air pump.

[0044] Among them, both the first switch and the second switch can be selected as relays. The relay is used as a switch to realize the on-off control of a high-voltage circuit by a low-voltage circuit. As Figure 1 shown, the first switch is relay 1 and the second switch is relay 2. The relay can include but is not limited to electromagnetic type and MOSFET type (metal oxide semiconductor field effect transistor). The air pump can be selected as a micro DC air pump, that is, an air pump powered by direct current for extracting gas, and the air pump has an air inlet and an air outlet.

[0045] The water level sensor of the present invention is a device that, based on the principle of resistance or capacitance, converts the parameters of the water level at the measured point into voltage signals in a contact or non-contact manner. The microcontroller of the present invention is a single-chip microcomputer, which should at least include GPIO, an analog-to-digital converter, and a central processing unit. Among them, GPIO can input or output digital electrical signals of high and low levels. The analog-to-digital converter can convert the input analog electrical signals into digital electrical signals, and the central processing unit can execute program codes.

[0046] As Figure 2 、 7 shown, the solenoid valve group includes a first electromagnetic air valve and a second electromagnetic air valve, both of which are two-position three-way electromagnetic air valves. The solenoid valve mainly uses the principle of electromagnetic force to control the opening, closing, or direction of the air path. Among them, the two-position three-way electromagnetic air valve is a solenoid valve with three air holes A, B, and C (there are valves at B and C to control opening and closing). When powered off, the AB path is open (the valve at the B hole is normally open), and the AC path is open (the valve at the C hole is normally closed); when powered on, the AB path is closed (the valve at the B hole is closed), and the AC path is open (the valve at the C hole is opened).

[0047] As Figure 3 shown, the air path structure composed of the solenoid valve group and the air pump in the embodiment of the present invention is shown. The dotted part is the position where the air path can be controlled by the solenoid valve to be opened or closed. Among them, the first electromagnetic air valve has three air holes A1, B1, and C1. The air hole A1 is connected to the air outlet of the air pump (the air pump and the solenoid valve group can be connected by a silica gel hose). The air hole B1 is a normally open hole of the valve, and the air hole B1 is connected to the air outlet of the waterproof pipeline. The air hole C1 is a normally closed hole of the valve, and the air hole C1 is connected to the air inlet of the waterproof pipeline. The second electromagnetic air valve has three air holes A2, B2, and C2. The air hole A2 is connected to the air inlet of the air pump. The air hole B2 is a normally open hole of the valve, and the air hole B2 is connected to the air inlet of the waterproof pipeline. The air hole C2 is a normally closed hole of the valve, and the air hole C2 is connected to the air outlet of the waterproof pipeline.

[0048] When the water level sensor senses that the water level in the waterproof pipeline is within the first preset range, the microprocessor controls the first switch to be disconnected and the second switch to be closed through the first signal output port. The solenoid valve group is not powered on, forming a forward air path. The gas enters the gas geochemical exploration equipment from the air inlet through the forward air path under the action of the air pump. That is, when the air extraction work is normally carried out, since no water enters the water level sensor, relay 1 is in an open state, relay 2 is in a closed state, the air pump operates normally, and the solenoid valve group is not powered on. Then, for the first electromagnetic air valve, the A1 - B1 path is open, and the A1 - C1 path is open; for the second electromagnetic air valve, the A2 - B2 path is open, and the A2 - C2 path is open. At this time, the gas flow direction in the air paths of the two electromagnetic air valves is as Figure 4 shown, and the gas moves from the air inlet of the waterproof pipeline to the air outlet, forming a forward air path.

[0049] When the water level sensor senses that the water level in the waterproof pipeline is within the second preset range, the microprocessor controls the first switch to close, the second switch to close, and the solenoid valve group to be energized, forming a reverse gas path. Under the action of the air pump, the gas discharges the water in the waterproof pipeline from the air inlet through the reverse gas path. That is, when water enters the air inlet of the waterproof pipeline during the air extraction process, as the water level rises, the water level sensor sends the sensed water level signal to the microprocessor. The microprocessor controls relay 1 to close, and relay 2 also closes. The solenoid valve group is energized to change the opening and closing state. Then, the A1 - B1 of the first electromagnetic air valve is open - circuited, and A1 - C1 is in a conducting path. The A2 - B2 of the second electromagnetic air valve is open - circuited, and A2 - C2 is in a conducting path. At this time, the gas flow direction in the gas paths of the two electromagnetic air valves is as Figure 5 shown. The gas moves from the air outlet of the waterproof pipeline to the air inlet, forming a reverse gas path. Under the action of the air pump, the gas discharges the water in the waterproof pipeline from the air inlet of the waterproof pipeline, thus forming an automatic drainage function without manual intervention.

[0050] In case of an accident, if the solenoid valve group fails, resulting in the gas path not being reversed, the water level will continue to rise. When the water level sensor senses that the water level in the waterproof pipeline is within the third preset range, the microprocessor controls the second switch to disconnect, and the air pump is powered off and stops running to prevent the water level from rising further and damaging the gas sensor.

[0051] In another embodiment of the present invention, as Figure 1 and Figure 6 shown, the microcontroller of this embodiment includes an analog - to - digital converter and a central processing unit, and its GPIO configuration is as follows: GPIO - 1 and GPIO - 2 are used as output terminals, outputting digital level signals with low voltage. GPIO - 3 is used as an input terminal, inputting an analog signal to the analog - to - digital converter. Among them, the operating logic of the central processing unit is as follows: Let the output value of the analog - to - digital converter be V, the output of the analog signal from the water level sensor after passing through the analog - to - digital converter when there is no water be V1, and the output when the water level reaches the maximum value of the range be V2. Then the value range of V is from V1 to V2. When V is less than or equal to V1, GPIO - 1 is at a low level, and GPIO - 2 is at a high level; when V is greater than V1 and less than V2, both GPIO - 1 and GPIO - 2 are at a high level; when V is equal to V2, GPIO - 2 is at a low level. The logic of the relay is as follows: When the IN terminal is at a low level, the NC terminal is disconnected from the COM terminal, that is, in an open - circuit state; when the IN terminal is at a high level, the NC terminal is connected to the COM terminal, that is, in a closed - circuit state.

[0052] The entire waterproof device will achieve the following effects during operation:

[0053] During normal air extraction work, since no water enters the water level sensor, relay 1 is in an open - circuit state, relay 2 is in a closed - circuit state, the air pump operates normally, and the solenoid valve is not energized. At this time, the gas flow direction in the gas path is as Figure 4, the gas moves from the air inlet to the air outlet.

[0054] When water enters the air inlet during the air extraction process, as the water level rises, it will ultimately cause the output level of the water level sensor to increase, resulting in the V output by the analog-to-digital converter being greater than V1 but less than V2. At this time, the central processing unit instructs to set GPIO-1 to a high level, causing the solenoid valve group to change its opening and closing state, and making the gas flow direction become Figure 5 . In this state, the movement direction of the gas is reversed, causing the water to be discharged from the air pipe. In the event of an accident, if the solenoid valve group fails and the gas path is not reversed, the water level will continue to rise, ultimately causing the V output by the analog-to-digital converter to be greater than V2. At this time, the central processing unit instructs to set GPIO-2 to a low level, causing the air pump to power off and stop operating, preventing the water level from rising further and damaging the gas sensor.

[0055] In this embodiment, the microcontroller can select the semiconductor STM32F103ZET6, which has 1 ARM Cortex-M3 core and 3 analog-to-digital converters. Its GPIO high level is 3.3V and its low level is 0V; the air pump is AD5DB12V with an operating voltage of 12V; the air valve is JS6402PW three-way water and gas valve with a working voltage of 12V; the relay is HFD4 / 3-S type with a trigger voltage of 3V; the water level sensor is HS-S37A resistive water level sensor, and its simplified circuit diagram is as Figure 6 . The air pump and the solenoid valve are connected by a silicone hose, as Figure 7 .

[0056] It can be seen that the present invention provides an automatic waterproof device for gas geochemical exploration equipment. In engineering practice, when liquid water is inhaled into the air pipe, the device can automatically detect the water intake and discharge the water without manual intervention, protecting the equipment without increasing the workload of personnel.

[0057] Therefore, in specific implementation, a gas geochemical exploration equipment with the above-mentioned waterproof device can be used. The waterproof device is connected to the gas sensor in the exploration equipment, thereby realizing automatic water discharge of the exploration equipment.

[0058] According to the above embodiment, the present invention also provides a waterproof method for gas geochemical exploration equipment, including the following steps:

[0059] During use, the air inlet of the waterproof pipeline is placed in the surface hole of the sampling point;

[0060] When the water level sensor senses the water level in the waterproof pipeline, it sends the sensing signal to the microprocessor;

[0061] The microprocessor generates a corresponding voltage signal according to the sensing signal;

[0062] When the voltage signal is within the first preset voltage range, a low level is output through the first signal output port to control the first switch to disconnect, the solenoid valve group is de-energized, a forward gas path is formed, a high level is output through the second signal output port to control the second switch to close, and the gas enters the gas geochemical exploration equipment from the air inlet through the forward gas path under the action of the air pump;

[0063] When the voltage signal is within the second preset voltage range, a high level is output through the first signal output port to control the first switch to close, the solenoid valve group is energized, a reverse gas path is formed, a high level is output through the second signal output port to control the second switch to close, and the gas discharges the water in the waterproof pipeline from the air inlet through the reverse gas path under the action of the air pump.

[0064] Furthermore, it further includes the step: in case of an accident, when the solenoid valve group fails and a reverse gas path cannot be formed, the water level rises. When the voltage signal generated according to the sensing signal is within the third preset voltage range, the microprocessor outputs a low level through the second signal output port to control the second switch to disconnect, and the air pump is powered off and stops operating.

[0065] It should be noted that according to the needs of implementation, each step / component described in this application can be split into more steps / components, or two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0066] In the above embodiments, the magnitudes of the sequence numbers of the steps do not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of this application.

[0067] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A waterproof device for gas geochemical exploration equipment, characterized in that, It includes a waterproof pipeline, which is connected to the gas geochemical exploration equipment. Above the air inlet of the waterproof pipeline, a water level sensor and a solenoid valve group are successively arranged. The waterproof device also includes an air pump, which is connected to the solenoid valve group; the waterproof device is also provided with a microcontroller. One signal input port of the microcontroller is connected to the water level sensor. The microprocessor is connected to the solenoid valve group through a first switch and is connected to the air pump through a second switch; When the water level sensor senses that the water level in the waterproof pipeline is within the first preset range, the microprocessor controls the first switch to disconnect and the second switch to close through the first signal output port. The solenoid valve group is de-energized to form a forward gas path. Under the action of the air pump, gas enters the gas geochemical exploration equipment from the air inlet through the forward gas path; When the water level sensor senses that the water level in the waterproof pipeline is within the second preset range, the microprocessor controls the first switch to close and the second switch to close. The solenoid valve group is energized to form a reverse gas path. Under the action of the air pump, the water in the waterproof pipeline is discharged from the air inlet through the reverse gas path.

2. The waterproof device for the gas geochemical exploration equipment according to claim 1, wherein, Both the first switch and the second switch are relays.

3. The waterproof device for the gas geochemical exploration equipment according to claim 1, characterized in that, The solenoid valve group includes a first electromagnetic gas valve and a second electromagnetic gas valve, both of which are two-position three-way electromagnetic gas valves. When the first switch is disconnected, the solenoid valve group is de-energized and in an open state; when the first switch is closed, the solenoid valve group is energized and in a closed state.

4. The waterproof device for gas geochemical exploration equipment according to claim 1, wherein When the solenoid valve group fails and cannot form a reverse gas path, the water level rises. When the water level sensor senses that the water level in the waterproof pipeline is within the third preset range, the microprocessor controls the second switch to disconnect and the air pump is powered off and stops operating.

5. The waterproof device for gas geochemical exploration equipment according to claim 1, characterized in that, The water level sensor is a resistive water level sensor.

6. The waterproof device for gas geochemical exploration equipment according to claim 1, characterized in that, The waterproof pipeline is connected to the gas sensor in the gas geochemical exploration equipment.

7. The waterproof device for a gas geochemical exploration device according to any one of claims 1-6, characterized in that, The air pump and the solenoid valve group are connected by a silica gel hose.

8. A gas geochemical exploration device, characterized in that, It includes a gas sensor, and the gas sensor is connected to the waterproof device described in any one of claims 1-6.

9. A waterproofing method for a gas geochemical exploration device, characterized in that, Based on the waterproof device described in claim 1, it includes the following steps: During use, the air inlet of the waterproof pipeline is placed in the surface hole of the sampling point; When the water level sensor senses the water level in the waterproof pipeline, it sends the sensed signal to the microprocessor; The microprocessor generates a corresponding voltage signal according to the sensed signal; When the voltage signal is within the first preset voltage range, a low level is output through the first signal output port to control the first switch to disconnect. The solenoid valve group is de-energized to form a forward gas path. A high level is output through the second signal output port to control the second switch to close. Under the action of the air pump, gas enters the gas geochemical exploration equipment from the air inlet through the forward gas path; When the voltage signal is within the second preset voltage range, a high level is output through the first signal output port to control the first switch to close. The solenoid valve group is energized to form a reverse gas path. A high level is output through the second signal output port to control the second switch to close. Under the action of the air pump, the water in the waterproof pipeline is discharged from the air inlet through the reverse gas path.

10. The waterproofing method of the gas geochemical exploration equipment according to claim 7, characterized in that, It also includes the steps: In case of an accident, when the solenoid valve group fails and cannot form a reverse gas path, the water level rises. When the voltage signal generated according to the sensed signal is within the third preset voltage range, the microprocessor outputs a low level through the second signal output port to control the second switch to disconnect and the air pump is powered off and stops operating.

Images