Geothermal water dissolved gas sampling device

Abstract

The invention provides a geothermal water-dissolved gas sampling device, which relates to the technical field of geological exploration and comprises a sampling bottle and a plug detachably connected with each other. The plug is provided with an inlet and an outlet, the inlet is provided with a water inlet pipe, and the outlet is provided with a water outlet pipe; the plug is hermetically connected with the sampling bottle, the water inlet pipe is hermetically connected with the inlet, and the water outlet pipe is hermetically connected with the outlet; a valve A is arranged on the water inlet pipe, and a valve B is arranged on the water outlet pipe; when the sampling device is used for sampling, the sampling bottle is firstly placed on the ground, and the plug faces upwards; after gas in the sampling bottle is emptied by geothermal water, the sampling bottle is inverted, the plug is downward, and the bottle bottom is upward; the geothermal water is continuously introduced, and in the flowing process of the geothermal water, dissolved gas in the geothermal water escapes from the geothermal water and is collected to the bottom of the bottle, so that the dissolved gas sampling of the geothermal water is realized. The sampling device has the advantages of being reasonable in design, high in practicability and convenient to use. By using the sampling device, the dissolved gas in the geothermal water can be quickly, efficiently and accurately collected.

Description

Technical Field

[0001] The invention relates to the technical field of geological exploration, and in particular to a geothermal water dissolved gas sampling device. Background Art

[0002] During geothermal resource exploration, the collection and detection of escaping gases are important experimental processes. According to B2.8.1 of the "Specifications for Geological Exploration of Geothermal Resources" (GBT 11615-2010), there are two commonly used escaping gas sampling methods: The first is the gas collecting pipe sampling method, the sampling device is shown in Figure 1 The process of using the sampling device is as follows: before sampling, sink the funnel connected to the gas collecting pipe into the water until the water surface rises above the spring clamp A, close the spring clamp A, and then inject the water previously injected into the pressure bottle into the gas collecting pipe. When the gas collecting pipe is filled with water, close the spring clamp B and the spring clamp C on the rubber tube, and be careful not to leave bubbles in the tube. Then fill the pressure bottle with water (be careful not to let air enter the gas collecting pipe through the pressure bottle), place the pressure bottle vertically in the water or lower than the gas collecting pipe, then move the funnel to the place where the bubbles of escaping gas are exposed, open the spring clamp A and spring clamp C, and the gas will be discharged. The bubbles will enter the gas collecting pipe along the funnel; when the water in the gas collecting pipe is drained, close the spring clamps A and C, and then take out the whole set of equipment from the water; the sampling device has the following main problems when in use: ① The operation is cumbersome; ② The structure and position of the funnel make it difficult for the gas to enter the gas collecting pipe through the top of the funnel, causing most of the gas to escape from the water surface outside the funnel, making the collection time extremely long; ③ The water surface where the funnel is located is in contact with the air, and the gas components in the air can easily enter the funnel through the water surface, causing the collected gas to be mixed with the gas components in the air, and not all water-soluble gas in the water.

[0003] 2. Ordinary glass bottle sampling method, sampling device see Figure 2Before sampling, first fill the glass bottle with water under the water surface, then turn the glass bottle upside down with the bottle mouth facing downwards, and check whether there are any bubbles in the bottle, then insert the stoppered funnel into the glass bottle under the water surface (note that there should be no bubbles in the funnel); move the device to the place where the bubbles are exposed, and after the water in the bottle is drained, take out the funnel under the water surface, plug the glass bottle with a bottle stopper, then take the glass bottle out of the water, and immediately seal it with wax, place the glass bottle upside down in a wooden box and transport it to the laboratory; it should be noted that before sealing the bottle, there must be a small amount of air in the glass bottle. The water is measured to ensure that the gas in the bottle does not escape and air can be prevented from entering the bottle. However, when the sampling device is in use, due to the low gas content in geothermal water, the device is prone to leakage. A small amount of escaping gas escapes from the funnel, and most of it escapes from the water surface outside. The gas content in geothermal water is low, so collection takes a very long time. The water surface where the funnel is located is in contact with the air, and the gas components in the air can easily enter the funnel through the water surface, causing the collected gas to be mixed with the gas components in the air, and not all water-soluble gas in the water.

[0004] The patent document with application number 201910200258.9 and subject name "A geothermal fluid gas sampling device for field use" discloses sampling using a cyclone device and a sampling device. During the sampling process, by controlling the second ball valve and controlling the flow rate, the geothermal fluid gathers gas in the conical cyclone, and the gas enters the sampling bottle through the first rubber tube, and the water in the sampling bottle is discharged by the gas, and the gas is retained in the sampling bottle; the main problems in this process are as follows: First, when gas gathers in the conical cyclone, the second ball valve needs to be in the open state. At this time, the drain pipe is connected to the atmosphere, which easily causes the atmosphere to enter the cyclone, thereby affecting the sampling accuracy; second, when the sampling bottle collects gas, the gas from the cyclone needs to discharge the liquid in the sampling bottle, which is time-consuming and labor-intensive, resulting in slow sampling speed; third, the sampling device has a complex structure, which is not conducive to fast and convenient sampling.

[0005] It can be seen that it is of great significance to provide a geothermal water dissolved gas sampling device with fast sampling speed and high precision. Summary of the Invention

[0006] In light of this, the present invention provides a geothermal water dissolved gas sampling device, comprising a sealed sampling bottle and a plug, the plug being provided with an air inlet and an air outlet. To vent the sampling bottle, the bottle is placed upright; after venting, the bottle is inverted for sampling. This sampling device boasts a rational design, strong practicality, and ease of use. Using this sampling device, dissolved gas in geothermal water can be quickly, efficiently, and accurately collected.

[0007] The technical solutions of the present invention are as follows: A geothermal water dissolved gas sampling device for sampling geothermal water gas; It includes a sampling bottle and a plug, and the sampling bottle and the plug are detachably connected; The plug is provided with an inlet and an outlet, the inlet is provided with a water inlet pipe, and the outlet is provided with a water outlet pipe; The plug is sealed to the sampling bottle, the water inlet is sealed to the inlet, and the water outlet is sealed to the outlet; The setting of sealing connection between the plug and the sampling bottle, the setting of sealing connection between the water inlet pipe and the inlet, and the setting of sealing connection between the water outlet pipe and the outlet can keep the sampling bottle in a sealed state during the sampling process, thereby reducing gas leakage and improving the collection efficiency of gas in geothermal water; The water inlet pipe is provided with a valve A, and the water outlet pipe is provided with a valve B; valves A and B are used to control the flow of geothermal water; When sampling, place the sampling bottle on the ground with the plug facing upwards; connect the water inlet pipe to the geothermal water source; Open valve A and valve B, and the geothermal water enters the sampling bottle through the water inlet pipe; When the geothermal water flows out of the outlet pipe, it means that the sampling bottle is completely filled with geothermal water, and the exhaust of the sampling bottle is completed; Then, turn the sampling bottle upside down with the seal facing down and the bottom of the bottle facing up; Then turn the sampling bottle upside down and continue to add geothermal water from the water inlet pipe into the sampling bottle. As the geothermal water is discharged from the water outlet pipe, the gas inside it will slowly escape and gather at the bottom of the bottle. The inverted setting of the sampling bottle can reduce the self-sealing of air into the sampling bottle, ensuring that the collected gas is the dissolved gas in the geothermal water; Continue to introduce geothermal water into the sampling bottle from the sampling tube. At this time, the gas in the geothermal water will slowly escape and gather at the bottom of the bottle. Since the plug is sealed with the sampling bottle, the water inlet pipe is sealed with the inlet, and the water outlet pipe is sealed with the outlet, the geothermal water can move along a predetermined trajectory, preventing the gas in the geothermal water from escaping and improving the collection efficiency of the gas in the geothermal water. When the gas fills 2 / 3 of the volume of the sampling bottle, remove the sampling bottle and seal it with a sealing stopper to complete the sampling.

[0008] Preferably, the closure is a bottle cap or a bottle stopper.

[0009] Preferably, the sampling device also includes a supporting assembly, which includes a base, a vertical pole is provided on the base, and a supporting member is provided on the vertical pole; after the exhaust work of the sampling bottle is completed, when the sampling bottle is inverted, the sampling bottle can be placed on the supporting member, thereby reducing manual labor intensity and allowing multiple samples to be sampled at the same time, thereby improving work efficiency.

[0010] Preferably, the supporting member is slidably connected to the vertical pole; the height of the supporting frame can be adjusted arbitrarily according to needs, thereby improving the flexibility of use of the sampling device.

[0011] Preferably, the supporting member includes a clamping claw A and a clamping claw B, and the clamping claw A and the clamping claw B are rotatably connected; a through hole A is provided on the clamping claw A and the clamping claw B, a bolt A passes through the through hole A, and a nut is provided at the end of the bolt A; a spring is provided between the clamping claw A and the clamping claw B, and the spring is used to support the clamping claw A and the clamping claw B so that the distance between the two can be adjusted, thereby facilitating the clamping of sampling bottles of different widths or diameters; the sampling bottle is fixed between the clamping claw A and the clamping claw B by utilizing the cooperation of the bolt A and the nut, thereby improving the operational flexibility of the sampling device, and improving the sampling efficiency and stability during the sampling process.

[0012] Preferably, a water tank is provided on the base, and the water tank is located on one side of the vertical pole; when sampling, a certain amount of water is injected into the water tank, and then the inverted sampling bottle is immersed in water to 1 / 2 of its height; this setting can further prevent air from entering the sampling bottle through the blockage during sampling, and ensure that the gas in the sampling bottle is geothermal water dissolved gas.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting a plug, a water inlet pipe and a water outlet pipe, and setting a sealed connection between the plug and the sampling bottle, the water inlet pipe and the inlet, and the water outlet pipe and the outlet, the geothermal water can flow along a specific channel during the sampling process, so that the gas in the geothermal water can be collected more quickly, thereby improving the gas collection efficiency; in addition, the setting of the sealed connection can reduce the air entering the sampling bottle, so that the gas in the sampling bottle is the dissolved gas in the geothermal water, thereby improving the sampling accuracy; by adopting the method of first placing the sampling bottle upright and then inverting the sampling bottle, after ensuring that the air in the sampling bottle is completely emptied, the light weight of the gas is used to make the gas in the geothermal water escape more quickly, thereby improving the collection efficiency. The above-mentioned setting makes the sampling device have the advantages of reasonable design, strong practicality and convenient use. Using this sampling device, the dissolved gas in the geothermal water can be collected quickly, efficiently and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 This is a diagram of the sampling device used in the gas collecting pipe sampling method in the prior art.

[0016] Figure 2 This is a diagram of the sampling device used in the conventional glass bottle sampling method in the prior art.

[0017] Figure 3 This is a schematic structural diagram of the sampling device of the present invention when it is inverted.

[0018] Figure 4 This is a schematic structural diagram of the sampling device of the present invention when placed upright.

[0019] Figure 5 It is a structural diagram of the bearing component.

[0020] Figure 1 In the middle, 1-funnel, 2-gas collecting tube, 3-pressure bottle, 4-rubber tube, 5-spring clamp A, 6-spring clamp B, 7-spring clamp C; Figure 3 In the figure, 8-sampling bottle, 9-plug, 10-inlet, 11-outlet, 12-water inlet pipe, 1201-horizontal section A, 1202-vertical section A, 13-water outlet pipe, 1301-horizontal section B, 1302-vertical section B, 14-valve A, 15-valve B, 1601-base, 1602-vertical pole, 17-connecting rod, 18-fixing ring, 19-bolt B, 2001-clamping claw A, 2002-clamping claw B, 2003-bolt A, 2004-nut, 2005-spring, 21-water tank. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0022] Combine Figure 3-Figure 5 , the present invention provides a geothermal water dissolved gas sampling device for geothermal water gas sampling; It includes a sampling bottle 8 and a plug 9, and the sampling bottle 8 and the plug 9 are detachably connected; The plug 9 is a bottle stopper, which is a silicone bottle stopper; The plug 9 is provided with an inlet 10 and an outlet 11, the inlet 10 is provided with a water inlet pipe 12, and the outlet 11 is provided with a water outlet pipe 13; When the water inlet pipe 12 and the water outlet pipe 13 are removed, the elasticity of the silicone bottle stopper can produce a certain sealing effect 9, reducing the air from entering the sampling bottle 8 from the inlet 10 and the outlet 11; The plug 9 is sealed to the sampling bottle 8, the water inlet pipe 12 is sealed to the inlet 10, and the water outlet pipe 13 is sealed to the outlet 11; The sealing connection between the plug 9 and the sampling bottle 8, the sealing connection between the water inlet pipe 12 and the inlet 10, and the sealing connection between the water outlet pipe 13 and the outlet 11 can keep the sampling bottle 8 sealed during the sampling process, thereby reducing gas leakage and improving the collection efficiency of the gas in the geothermal water. A valve A14 is provided on the water inlet pipe 12, and a valve B15 is provided on the water outlet pipe 13; valves A14 and B15 are used to control the flow of geothermal water; The water inlet pipe 12 includes a horizontal section A1201 and a vertical section A1202. The valve A14 is located on the horizontal section A1201. The free end of the horizontal section A1201 is connected to the geothermal water drain pipe; the free end of the vertical section A1202 passes through the plug 9 and is located inside the sampling bottle. The outlet pipe 13 includes a horizontal section B1301 and a vertical section B1302. The valve B15 is located on the horizontal section B1301. The free end of the horizontal section B1301 is connected to the wastewater collection tank. In this application, the free end of the horizontal section B1301 is located in the water tank 21; the free end of the vertical section B1302 passes through the plug 9 and is located inside the sampling bottle. The length of the vertical section A1202 is greater than that of the vertical section B1302; the free end surface of the vertical section A1202 and the free end surface of the vertical section B1302 are located on the same horizontal plane; when the sampling bottle 8 is placed upright on the ground, the top of the vertical section A1202 is higher than the top of the vertical section B1302, which facilitates the entry of geothermal water into the sampling bottle 8 to empty the gas inside it, thereby improving the emptying efficiency and effect; when the sampling bottle 8 is inverted, the bottom of the vertical section A1202 is lower than the bottom of the vertical section B1302, and the geothermal water enters the sampling bottle 8 under pressure. The gas dissolved in the geothermal water in the sampling bottle 8 releases pressure inside the sampling bottle 8, thereby escaping and gathering at the bottom of the bottle, thereby improving the sampling efficiency; The sampling device further includes a support assembly, which includes a base 1601, a vertical rod 1602 provided on the base 1601, and a supporting member provided on the vertical rod 1602; after the exhaust work of the sampling bottle 8 is completed, the sampling bottle 8 can be placed on the supporting member when it is inverted, thereby reducing manual labor intensity and allowing multiple samples to be sampled simultaneously, thereby improving work efficiency; The supporting member is slidably connected to the vertical rod 1602; the height of the supporting frame can be adjusted as needed to improve the flexibility of the sampling device; In this embodiment, a fixing ring 18 is connected to the support member via a connecting rod 17. The fixing ring 18 is sleeved on the outside of the vertical pole 1602. The fixing ring 18 is provided with a threaded hole (not shown in the figure), in which a bolt B19 is installed. The bolt B19 engages with the threaded hole. When the support member reaches a specified height, the bolt B19 is tightened so that the end of the bolt B19 abuts against the vertical pole 1602, thereby fixing the support member. The carrier includes a clamping claw A2001 and a clamping claw B2002, which are rotatably connected to each other. A through hole A (not shown in the figure) is provided on each of the clamping claws A2001 and B2002, through which a bolt A2003 passes. A nut 2004 is provided at the end of the bolt A2003. A spring 2005 is provided between the clamping claws A2001 and B2002. The spring 2005 is used to support the clamping claws A2001 and B2002 so that the distance between them can be adjusted, thereby facilitating the clamping of sampling bottles 8 of different widths or diameters. The bolt A2003 cooperates with the nut 2004 to fix the sampling bottle 8 between the clamping claws A2001 and B2002, thereby improving the operational flexibility of the sampling device, and improving the sampling efficiency and stability during the sampling process. A water tank 21 is provided on the base 1601 and is located on one side of the upright 1602. When sampling, a certain amount of water is poured into the water tank 21, and then the inverted sampling bottle 8 is immersed in the water to a height of 1 / 2. This arrangement can further prevent air from entering the sampling bottle 8 through the plug 9 during sampling, ensuring that the gas in the sampling bottle 8 is geothermal water dissolved gas. When sampling, place the sampling bottle 8 on the ground with the plug 9 facing upwards; connect the water inlet pipe 12 to the geothermal water source; Open valve A14 and valve B15, and the geothermal water enters the sampling bottle 8 through the water inlet pipe 12; When the geothermal water flows out of the water outlet pipe 13, it indicates that the sampling bottle 8 is completely filled with geothermal water, that is, the exhaust work of the sampling bottle 8 is completed; Then, turn the sampling bottle 8 upside down, with the stopper 9 facing downward and the bottom of the bottle facing upward; Then, the sampling bottle 8 is turned upside down and fixed between the clamping claw A2001 and the clamping claw B2002; Continue to introduce geothermal water into the sampling bottle 8 from the water inlet pipe 12. As the geothermal water is discharged from the water outlet pipe 13, the gas inside it will slowly escape and gather at the bottom of the bottle. The inverted arrangement of the sampling bottle 8 can reduce the air from the self-sealing plug 9 to enter the sampling bottle 8, ensuring that the collected gas is the dissolved gas in the geothermal water; Continue to introduce geothermal water into the sampling bottle 8 from the sampling tube. At this time, the gas in the geothermal water will slowly escape and gather at the bottom of the bottle. Since the plug 9 is sealedly connected to the sampling bottle 8, the water inlet pipe 12 is sealedly connected to the inlet 10, and the water outlet pipe 13 is sealedly connected to the outlet 11, the geothermal water can move along a predetermined trajectory, preventing the gas in the geothermal water from escaping and improving the collection efficiency of the gas in the geothermal water. When the gas fills 2 / 3 of the volume of the sampling bottle 8, remove the sampling bottle 8 and seal it with a sealing plug to complete the sampling.

[0023] Although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who can easily conceive of changes or substitutions within the technical scope disclosed in the present invention shall be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A geothermal water dissolved gas sampling device, characterized in that: It includes a sampling bottle and a plug, and the sampling bottle and the plug are detachably connected; The plug is provided with an inlet and an outlet, the inlet is provided with a water inlet pipe, and the outlet is provided with a water outlet pipe; The plug is sealed to the sampling bottle, the water inlet is sealed to the inlet, and the water outlet is sealed to the outlet; The water inlet pipe is provided with a valve A, and the water outlet pipe is provided with a valve B; When sampling, the above-mentioned sampling device first places the sampling bottle on the ground with the seal facing upwards; after the geothermal water empties the gas in the sampling bottle, the sampling bottle is inverted with the seal facing downwards and the bottom of the bottle facing upwards; the geothermal water continues to be introduced. During the flow of geothermal water, the dissolved gas inside it escapes from the geothermal water and gathers at the bottom of the bottle, thereby realizing geothermal water dissolved gas sampling.

2. The geothermal water dissolved gas sampling device according to claim 1, characterized in that: The closure is a bottle cap or a bottle stopper.

3. The geothermal water dissolved gas sampling device according to claim 1, characterized in that: The sampling device further comprises a supporting assembly, which comprises a base, a vertical rod is provided on the base, and a bearing member is provided on the vertical rod; the bearing member is used to support and fix the inverted sampling bottle.

4. The geothermal water dissolved gas sampling device according to claim 3, characterized in that: The bearing member is slidably connected to the vertical pole.

5. The geothermal water dissolved gas sampling device according to claim 3, characterized in that: The supporting member includes a clamping claw A and a clamping claw B, which are rotatably connected; a through hole A is provided on each of the clamping claws A and B, a bolt A passes through the through hole A, and a nut is provided at the end of the bolt A; a spring is provided between the clamping claws A and B.

6. The geothermal water dissolved gas sampling device according to claim 3, characterized in that: A water tank is provided on the base and is located on one side of the upright pole.

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