Underground water collecting device for underground water sample detection

Abstract

The invention discloses an underground water collecting device for underground water sample detection, which comprises a fixing frame and a sampling mechanism, the sampling mechanism comprises a sensing part and a collecting part, and the sensing part comprises a mounting cylinder, a sealing head, a spring part and an adjusting part; the collecting part comprises a sampling cylinder, a floating ball and an inner sealing ring; the sealing head is movably and hermetically connected to one side of the bottom of the mounting cylinder; the spring piece is arranged in the mounting cylinder and used for applying pressure to the sealing head, and the adjusting piece is used for adjusting the pressure; the sampling cylinder is fixedly connected with the mounting cylinder, and a sealable discharge outlet is formed in the bottom of the sampling cylinder; a water inlet channel is arranged between the sampling cylinder and the mounting cylinder; the inner sealing ring is movably connected in the sampling cylinder in a sealing manner, and the floating ball is movably arranged in the sampling cylinder and connected with the inner sealing ring. By means of the design, water samples at different depths can be collected, repeated collection is not needed, and the collection efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of groundwater sampling devices, and specifically relates to a groundwater collection device for groundwater water sample detection. Background Art

[0002] As an important part of water resources, groundwater plays a crucial role in many aspects such as domestic water use, agricultural irrigation, and industrial production of residents. Its water quality directly relates to the ecological environment safety and the health and sustainable development of humans. Accurately grasping information such as the water quality components and pollution degree of groundwater is of great significance for the rational development and utilization of groundwater, effective water resource management, and timely implementation of water pollution prevention and control work. Therefore, regular and scientific detection of groundwater water samples has become an essential task in fields such as environmental monitoring.

[0003] In the past groundwater water sample collection process, the commonly used methods mainly utilized simple water intake tools, such as single-tube samplers, etc. Such samplers can often only collect water samples at a certain depth. When it is necessary to obtain groundwater water samples at different depths, the sampler needs to be lowered and lifted multiple times, and sampling operations are carried out at different depth positions respectively. This traditional collection method has many obvious drawbacks. On the one hand, multiple sampling operations will consume a large amount of time and labor costs, especially in large-scale detection work that requires collecting water samples at multiple different depths, which will seriously slow down the progress of the entire detection work. On the other hand, since the lowering and lifting operations of the sampler during each sampling process may cause a certain disturbance to the surrounding water environment, thus affecting the accuracy of the subsequently collected water samples. For example, it may cause the water samples at different depths to mix with each other, making the collected water samples unable to truly reflect the original water quality conditions at the corresponding depths. Moreover, the process of repeatedly operating the sampler to position and sample at different depths requires a high level of operation proficiency for sampling personnel. If there is a slight mistake, problems such as inaccurate sampling depth may occur, thereby affecting the reliability of the final water sample detection results.

[0004] In the patent with the application number CN202421487856.1, a groundwater sampling device is disclosed, which includes a sampling assembly. The sampling assembly includes a long-strip-shaped sampling cover. A chassis is installed at the bottom of the sampling cover. Water guiding ports are equidistantly arranged at the outer edge of the sampling cover, and a collection assembly is installed inside the sampling cover. This device uses a motor and a rope to lower the collection assembly into the water for collection. Using this groundwater sampling device, only one water sample can be collected each time. When water samples at multiple depths are required, multiple repeated operations are needed. Therefore, there will be problems of time-consuming, labor-consuming, and inaccurate water sample detection results. Summary of the Invention

[0005] The object of the present invention is to provide a groundwater sampling device for groundwater water sample detection, so as to solve the following technical problems raised in the background art:

[0006] The groundwater sampling devices in the prior art can only collect water samples at a certain depth. When it is necessary to obtain water samples at different depths, repeated sampling is required, which is time-consuming and laborious.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A groundwater sampling device for groundwater water sample detection, including a fixing frame and a sampling mechanism. A plurality of sampling mechanisms are fixed to the fixing frame; the sampling mechanism includes an induction component and a collection component. Among them, the induction component includes an installation cylinder, a sealing head, a spring member and an adjusting member; the collection component includes a sampling cylinder, a floating ball and an inner sealing ring; the bottom of the installation cylinder is open, and the sealing head is movably and sealingly connected to one side of the bottom of the installation cylinder; an upper limit ring and a lower limit ring are respectively arranged on both sides of the sealing head in the installation cylinder; the spring member is arranged in the installation cylinder, and the spring member is used to apply pressure to the sealing head, and the adjusting member is used to adjust the pressure magnitude; the sampling cylinder is fixedly connected to the installation cylinder, and a sealable discharge port is arranged at the bottom of the sampling cylinder; a water inlet channel is arranged between the sampling cylinder and the installation cylinder, and the sealing head in the initial state seals the water inlet channel; the inner sealing ring is movably and sealingly connected in the sampling cylinder, and the floating ball is movably arranged in the sampling cylinder and connected to the inner sealing ring; after water enters the sampling cylinder, the floating ball drives the inner sealing ring to seal the water inlet channel.

[0009] Further, a suspension ring is fixedly connected to one side of the top of the fixing frame, a connecting rod is fixedly connected to one side of the bottom of the fixing frame, and a counterweight block is detachably connected to the connecting rod.

[0010] Further, the bottom of the sealing head is provided with an arc-shaped concave contact part.

[0011] Further, a plurality of sealing grooves are arranged on one side of the bottom of the sealing head, and a plurality of sealing rings are arranged in the sealing grooves.

[0012] Further, the spring member includes a movable cylinder, a compression spring, a contact plate and a movable rod; the adjusting member includes an adjusting head and an adjusting screw; among them, a sliding block is fixedly connected to the outside of the movable cylinder, and the movable cylinder is slidably connected to the installation cylinder through the sliding block; the contact plate is movably connected in the movable cylinder, and a limiting protrusion is arranged in the movable cylinder to prevent the contact plate from rotating; one end of the movable rod is fixedly connected to the contact plate, and the other end extends out of the movable cylinder and is connected to the adjusting screw. The adjusting head is rotatably connected to the top of the outside of the installation cylinder, an inner hole is arranged in the adjusting head, internal threads are arranged on the inner wall of the inner hole, and the top of the adjusting screw penetrates the installation cylinder and is threadedly connected into the adjusting head.

[0013] Further, one side of the top of the movable rod is fixedly connected with an upper sliding sealing plate, and the upper sliding sealing plate is slidably and sealingly connected with the installation cylinder; one side of the bottom of the movable cylinder is fixedly connected with an installation rod, the bottom of the installation rod is fixedly connected with a sealing head, a lower sliding sealing plate is fixedly connected to the installation rod, and the lower sliding sealing plate is slidably and sealingly connected with the installation cylinder; a sealing space is formed between the upper sliding sealing plate and the lower sliding sealing plate, and a first one-way valve is arranged on the cylinder wall of the installation cylinder, and the first one-way valve is connected with the sealing space.

[0014] Further, a pressure sensor is arranged between the sealing head and the installation rod.

[0015] Further, a filter screen is arranged on one side of the bottom of the installation cylinder.

[0016] Further, a second one-way valve is arranged on one side of the sampling cylinder.

[0017] Further, an external thread is arranged on the outer side of the discharge port, and a bottom cover is connected to the external thread of the discharge port.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, the fixing frame can install multiple sampling mechanisms at the same time, and can sink the sampling mechanisms into the water through the cooperation of the rope with the motor and the winding roller for sampling. This design makes the operation of putting in and retrieving the sampling device relatively convenient, facilitating large-scale and multi-depth water sample collection work in the deep well environment, reducing the manual operation difficulty and workload, and improving the overall collection efficiency.

[0020] In the present invention, by adjusting the adjusting members in different sampling mechanisms, the initial pressure on the sealing head is changed, so that each sealing head can move at different water depths due to the water pressure overcoming the corresponding pressure, and then the water inlet channel is opened to allow water to enter the sampling cylinder. In this way, by using multiple sampling mechanisms to work simultaneously, water samples at different depths can be collected at one time.

[0021] In the present invention, in the initial state, the sealing head seals the water inlet channel, and after the water enters the sampling cylinder, the floating ball drives the inner sealing ring to seal the water inlet channel, effectively avoiding the situation that the sampling cylinder enters water again after the water enters, ensuring that the collected water sample will not be interfered by water samples in other water layers, guaranteeing the independence and accuracy of water samples at each depth, and facilitating the subsequent detection results to truly reflect the water quality characteristics of the corresponding depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the overall structural schematic diagram of the present invention;

[0023] Figure 2 is the internal structural schematic diagram of the present invention;

[0024] Figure 3 is the internal schematic diagram of the present invention during sampling;

[0025] Figure 4 Schematic structural diagram of the movable cylinder of the present invention;

[0026] Figure 5 Schematic structural diagram of the sealing head of the present invention;

[0027] Figure 6 Schematic structural diagram of the inner sealing ring and the floating ball of the present invention.

[0028] Markings in the figure: 1 - fixing frame, 2 - lifting ring, 3 - connecting rod, 4 - counterweight, 5 - sampling mechanism, 6 - adjusting head, 7 - mounting cylinder, 8 - upper sliding sealing plate, 9 - movable cylinder, 10 - first one-way valve, 11 - sealing space, 12 - sliding block, 13 - mounting rod, 14 - lower sliding sealing plate, 15 - sealing head, 16 - pressure sensor, 17 - lower limit ring, 18 - filter screen, 19 - contact part, 20 - water inlet channel, 21 - bottom cover, 22 - discharge port, 23 - inner sealing ring, 24 - floating ball, 25 - limit fixing ring, 26 - sampling cylinder, 27 - upper limit ring, 28 - compression spring, 29 - limit protrusion, 30 - second one-way valve, 31 - contact plate, 32 - movable rod, 33 - adjusting screw, 34 - sealing groove. Detailed implementation manners

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment:

[0031] A groundwater sampling device for detecting groundwater water samples, comprising a fixing frame 1 and a sampling mechanism 5, and a plurality of sampling mechanisms 5 are fixed to the fixing frame 1; the sampling mechanism 5 includes an induction component and a sampling component. Among them, the induction component includes an installation cylinder 7, a sealing head 15, a spring member and an adjusting member; the sampling component includes a sampling cylinder 26, a floating ball 24 and an inner sealing ring 23; the bottom of the installation cylinder 7 is open, and the sealing head 15 is movably and sealingly connected to one side of the bottom of the installation cylinder 7; upper and lower limit rings 27 and 17 are respectively arranged on both sides of the sealing head 15 in the installation cylinder 7; the spring member is arranged in the installation cylinder 7, and the spring member is used to apply pressure to the sealing head 15, and the adjusting member is used to adjust the pressure magnitude; the sampling cylinder 26 is fixedly connected to the installation cylinder 7, and a sealable discharge port 22 is arranged at the bottom of the sampling cylinder 26; a water inlet channel 20 is arranged between the sampling cylinder 26 and the installation cylinder 7, and the sealing head 15 in the initial state seals the water inlet channel 20; the inner sealing ring 23 is movably and sealingly connected in the sampling cylinder 26, and the floating ball 24 is movably arranged in the sampling cylinder 26 and is connected to the inner sealing ring 23; after water enters the sampling cylinder 26, the floating ball 24 drives the inner sealing ring 23 to seal the water inlet channel 20, and the floating ball 24 can drive the inner sealing ring 23 to move through a rope or a rod.

[0032] Among them, the fixing frame 1 is used to install a plurality of sampling mechanisms 5 at the same time. During use, the fixing frame 1 is connected to a rope, and the sampling mechanism 5 is sunk into the water through a motor and a winding roller for sampling. It should be noted that the groundwater sampling device of the present invention is applicable to deep wells. In the sampling mechanism 5, the spring member is used to press the sealing head 15 against the lower limit ring 17 and apply pressure to the sealing head 15. The spring member includes but is not limited to a compression spring 28, a disc spring, etc. The adjusting member adjusts the pressure applied by the spring member to the sealing head 15 by squeezing the spring member. The bottom of the sealing head 15 is in direct contact with water and bears water pressure. The deeper the water, the higher the water pressure it bears. When the water pressure overcomes the pressure applied by the spring member, it can push the sealing head 15 to move. To facilitate the movement of the sealing head 15, the inside of the installation cylinder 7 can be evacuated in advance. By adjusting the adjusting members in different sampling mechanisms 5, the pressures received by each sealing head 15 are different, so that each sealing head 15 moves at different water depths. After the sealing head 15 moves, the water inlet channel 20 is opened, and water enters the sampling cylinder 26 through the water inlet channel 20. To facilitate water to enter the sampling cylinder 26, the sampling cylinder 26 can be evacuated in advance. After water enters the sampling cylinder 26, it will lift the floating ball 24. The floating ball 24 moves upward and drives the sealing ring to rise to block the water inlet channel 20. Further optimized, a limit fixing ring 25 is arranged on one side of the top of the water inlet channel 20 in the sampling cylinder 26. The limit fixing ring 25 is used to limit the rising distance of the sealing ring to prevent the sealing ring from moving upward excessively and opening the water inlet channel 20. Blocking the water inlet channel 20 can prevent the sampling cylinder 26 from re-entering water after water enters. Through this design, water samples at different depths can be collected at one time.

[0033] In a preferred embodiment, a lifting ring 2 is fixedly connected to one side of the top of the fixing frame 1, and a connecting rod 3 is fixedly connected to one side of the bottom of the fixing frame 1. A counterweight 4 is detachably connected to the connecting rod 3. The design of the lifting ring 2 provides a reliable hanging point for the entire groundwater collection device, facilitating connection with external lifting equipment such as motors and winding rollers through ropes. On the connecting rod 3, the counterweight 4 is detachably connected by means of a threaded connection. The counterweight 4 is usually made of a metal with a relatively high density, such as a lead block or a cast iron block, etc. The design of the counterweight 4 is to ensure that during the sinking process of the groundwater collection device, the overall weight of the device is increased, ensuring that the fixing frame 1 can quickly and stably descend to the predetermined sampling depth, and at the same time ensuring that the entire device can maintain a relatively stable posture during the sampling process.

[0034] In a preferred embodiment, an arc-shaped concave contact portion 19 is provided at the bottom of the sealing head 15. The arc-shaped concave contact portion 19 can effectively increase the bottom contact area of the sealing head 15, making the pressure change on the sealing head 15 more obvious, that is, enabling the sealing head 15 to generate more stable movement.

[0035] In a preferred embodiment, a number of sealing grooves 34 are provided on one side of the bottom of the sealing head 15, and a number of sealing rings are arranged in the sealing grooves 34. By providing the sealing grooves 34 and placing the sealing rings therein, the sealing performance at the connection between the sealing head 15 and the lower limit ring 17 can be greatly enhanced. Because during the groundwater collection process, the sealing head 15 needs to effectively seal the water inlet passage 20 to prevent water from entering the sampling cylinder 26 before the appropriate water pressure pushes it to move, which affects the accuracy of water sample collection and the precise control of water sample collection at different depths. The existence of these sealing rings can fill the possible tiny gaps between the sealing head 15 and the installation cylinder 7. Even under complex conditions such as bearing water pressure changes at different depths and being immersed in water for a long time, the sealing effect can always be ensured to be good, ensuring that the entire groundwater collection device can smoothly collect water samples at different depths as expected, and making the collection work more reliable and precise.

[0036] In a preferred embodiment, the spring member includes a movable cylinder 9, a compression spring 28, a contact plate 31 and a movable rod 32; the adjusting member includes an adjusting head 6 and an adjusting screw 33; wherein, a sliding block 12 is fixedly connected to the outer side of the movable cylinder 9, and the movable cylinder 9 is slidingly connected to the mounting cylinder 7 through the sliding block 12; the contact plate 31 is movably connected to the movable cylinder 9, and a limiting protrusion 29 is provided in the movable cylinder 9, and the limiting protrusion 29 is used to prevent the contact plate 31 from rotating; one end of the movable rod 32 is fixedly connected to the contact plate 31, and the other end extends out of the movable cylinder 9 and is connected to the adjusting screw 33, the adjusting head 6 is rotatably connected to the outer top of the mounting cylinder 7, an inner hole is provided in the adjusting head 6, and an inner thread is provided on the wall of the inner hole, and one side of the top of the adjusting screw 33 penetrates the mounting cylinder 7 and is threadedly connected to the adjusting head 6.

[0037] Specifically, when the operator manually rotates the adjusting head 6, since the adjusting head 6 and the adjusting screw 33 are in a threaded connection, the adjusting screw 33 can move axially under the action of this threaded transmission, and the movement of the adjusting screw 33 will drive the movable rod 32 connected thereto to move accordingly, and the movable rod 32 then applies a force to the compression spring 28 through the contact plate 31 to achieve the compression or loosening operation of the compression spring 28, and the movable cylinder 9 always plays its role, firmly against the sealing head 15, so that the spring force can be effectively transmitted to the sealing head 15. Through such a clever design, the rotating adjusting head 6 can accurately and conveniently change the initial pressure of the sealing head 15. Such a structural design makes it more convenient to adjust the initial pressure of the sealing head 15. When facing the needs of collecting groundwater at different depths, the initial pressure of the sealing head 15 in each sampling mechanism 5 can be flexibly adjusted according to actual needs, so that different sealing heads 15 can be accurately pushed to open the water inlet channel 20 at the corresponding and expected water depth, thereby achieving effective collection of water samples at different depths.

[0038] Preferably, an upper sliding seal plate 8 is fixedly connected to one side of the top of the movable rod 32, and the upper sliding seal plate 8 is slidably and sealingly connected to the mounting cylinder 7; a mounting rod 13 is fixedly connected to one side of the bottom of the movable cylinder 9, the bottom of the mounting rod 13 is fixedly connected to the sealing head 15, and a lower sliding seal plate 14 is fixedly connected to the mounting rod 13. The lower sliding seal plate 14 is slidably and sealingly connected to the mounting cylinder 7; a sealing space 11 is formed between the upper sliding seal plate 8 and the lower sliding seal plate 14, and a first one-way valve 10 is arranged on the cylinder wall of the mounting cylinder 7. The first one-way valve 10 is connected to the sealing space 11. The first one-way valve 10 can facilitate the evacuation of the sealing space 11. After evacuating the sealing space 11, the air pressure condition in the sealing space 11 can be changed to form a negative pressure environment. In this way, when the groundwater collection device sinks into the water, when the external water pressure acts on the sealing head 15, due to the existence of negative pressure in the sealing space 11, the sealing head 15 will be more easily pushed under the appropriate water pressure, so as to more accurately open the water inlet channel 20 according to the set pressure difference, ensuring the accuracy of water sample collection and the effective control of water sample collection at different depths, and avoiding the situation that the sealing head 15 opens too early or too late due to the interference of factors such as air pressure.

[0039] Further preferably, a pressure sensor 16 is arranged between the sealing head 15 and the mounting rod 13. With the help of the pressure sensor 16, the pressure value borne by the sealing head 15 can be monitored in real time and accurately. When the groundwater collection device is lowered into the water at different depths, as the water depth changes, the water pressure will also change accordingly, and the pressure condition of the sealing head 15 is the key factor determining when the water inlet channel 20 opens and whether the water sample at the corresponding depth can be accurately collected. By accurately obtaining the pressure data through the pressure sensor 16 and transmitting it to the control system, the operator can clearly know the current pressure state of the sealing head 15 at any time, so as to better judge the progress of the entire water sample collection work. The data fed back by the pressure sensor 16 can provide an important reference basis for adjusting the initial pressure of the sealing head 15. When it is necessary to collect water samples at different depths, according to the theoretical water pressure value corresponding to different depths and the actual pressure value fed back by the pressure sensor 16, the operator can more precisely adjust the initial pressure of the sealing head 15 through the adjusting member, so that the sealing heads 15 of each sampling mechanism 5 can be just pushed at the expected water depth, and then accurately open the water inlet channel 20, realizing the efficient and accurate collection of water samples at different depths, greatly improving the scientificity and accuracy of the entire groundwater collection device for collecting water samples, and ensuring the smooth progress of the collection work.

[0040] In a preferred embodiment, a filter screen 18 is provided on one side of the bottom of the installation cylinder 7. During the process of collecting groundwater water samples, groundwater often contains various impurities, such as sediment, small stones, algae, and other suspended particulate matters. The presence of the filter screen 18 can effectively intercept these impurities and prevent them from entering the sampling cylinder 26 along with the water flow. By filtering out these impurities, it can also well protect each component inside the sampling device. For example, it can prevent impurities from entering the sampling cylinder 26 and accumulating in the water inlet channel 20 or affecting the normal operation of components such as the floating ball 24 and the inner sealing ring 23, reduce the probability of device failures caused by impurity accumulation, blockage, etc., extend the service life of the entire groundwater collection device, and ensure that the device can stably and efficiently complete the collection of water samples at different depths for a long time.

[0041] In a preferred embodiment, a second one-way valve 30 is provided on one side of the sampling cylinder 26. Before preparing to carry out the water sample collection work, in order to allow groundwater to enter the sampling cylinder 26 more smoothly and efficiently, it is necessary to evacuate the sampling cylinder 26 in advance to create a negative pressure environment inside the sampling cylinder 26. At this time, this second one-way valve 30 provided on one side of the sampling cylinder 26 plays an irreplaceable key role. By connecting a matching evacuation device to the second one-way valve 30, the characteristic that the one-way valve allows gas to flow unidirectionally can be utilized to conveniently and effectively evacuate the air inside the sampling cylinder 26, causing the air pressure inside the sampling cylinder 26 to rapidly decrease and forming a negative pressure condition conducive to the inflow of groundwater. In this way, when the groundwater comes into contact with the sampling cylinder 26, under the action of the internal and external air pressure difference, the water can more smoothly enter the sampling cylinder 26 through the water inlet channel 20, greatly improving the efficiency of water sample collection and the smoothness of the collection process.

[0042] In a preferred embodiment, an external thread is provided on the outside of the discharge port 22, and the bottom cover 21 is externally threaded to the discharge port 22. After the water sample collection is completed, the water sample inside the sampling cylinder 26 can be released by opening the bottom cover 21. This design of externally threading the bottom cover 21 greatly enhances the sealing performance of the discharge port 22. During the water sample collection process and the stage of waiting for detection after the collection is completed, it can effectively prevent the water sample from accidentally leaking from the discharge port 22. The threaded connection method makes the opening and closing operation of the bottom cover 21 very convenient and reliable. When the staff needs to release the water sample for detection, they only need to simply twist the bottom cover 21, and they can easily open the discharge port 22 and smoothly release the water sample without the need to use complex tools or perform cumbersome operation steps. This design also facilitates the repeated use of the sampling cylinder 26. After the water sample is released, corresponding cleaning, maintenance, etc. operations are performed on the sampling cylinder 26, and then the bottom cover 21 is tightened, and the sampling cylinder 26 can be in a good sealed state again.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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. Therefore, it should not be construed as a limitation to the present invention.

[0044] In the present invention, unless otherwise clearly specified and defined, terms such as "installed", "set", "connected", "fixed", "swivelly connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A groundwater sampling device for detecting groundwater water samples, characterized in that: It includes a fixing frame (1) and a sampling mechanism (5), and multiple sampling mechanisms (5) are fixed to the fixing frame (1). The sampling mechanism (5) includes a sensing component and a collecting component. Among them, the sensing component includes an installation cylinder (7), a sealing head (15), a spring member, and an adjusting member; the collecting component includes a sampling cylinder (26), a floating ball (24), and an inner sealing ring (23). The bottom of the installation cylinder (7) is open, and the sealing head (15) is movably and sealingly connected to one side of the bottom of the installation cylinder (7); an upper limit ring (27) and a lower limit ring (17) are respectively arranged on both sides of the sealing head (15) inside the installation cylinder (7); the spring member is arranged inside the installation cylinder (7), and the spring member is used to apply pressure to the sealing head (15), and the adjusting member is used to adjust the pressure magnitude; the sampling cylinder (26) is fixedly connected to the installation cylinder (7), and a sealable discharge port (22) is arranged at the bottom of the sampling cylinder (26); a water inlet channel (20) is arranged between the sampling cylinder (26) and the installation cylinder (7), and the sealing head (15) in the initial state seals the water inlet channel (20); the inner sealing ring (23) is movably and sealingly connected inside the sampling cylinder (26), and the floating ball (24) is movably arranged inside the sampling cylinder (26) and is connected to the inner sealing ring (23); after water enters the sampling cylinder (26), the floating ball (24) drives the inner sealing ring (23) to seal the water inlet channel (20).

2. The groundwater sampling device for groundwater water sample detection according to claim 1, wherein: A lifting ring (2) is fixedly connected to one side of the top of the fixing frame (1), a connecting rod (3) is fixedly connected to one side of the bottom of the fixing frame (1), and a counterweight block (4) is detachably connected to the connecting rod (3).

3. The groundwater sampling device for groundwater water sample detection according to claim 1, characterized in that: The bottom of the sealing head (15) is provided with a concave arc-shaped contact portion (19).

4. The groundwater sampling device for groundwater water sample detection according to claim 1, wherein: A plurality of sealing grooves (34) are arranged on one side of the bottom of the sealing head (15), and a plurality of sealing rings are arranged in the sealing grooves (34).

5. The groundwater sampling device for groundwater water sample detection according to claim 1, wherein: The spring member includes a movable cylinder (9), a compression spring (28), a contact plate (31), and a movable rod (32); the adjusting member includes an adjusting head (6) and an adjusting screw rod (33); among them, a sliding block (12) is fixedly connected to the outer side of the movable cylinder (9), and the movable cylinder (9) is slidably connected to the installation cylinder (7) through the sliding block (12); the contact plate (31) is movably connected inside the movable cylinder (9), a limiting protrusion (29) is arranged inside the movable cylinder (9), and the limiting protrusion (29) is used to prevent the contact plate (31) from rotating; one end of the movable rod (32) is fixedly connected to the contact plate (31), and the other end extends outside the movable cylinder (9) and is connected to the adjusting screw rod (33), the adjusting head (6) is rotatably connected to the top of the outer side of the installation cylinder (7), an inner hole is arranged inside the adjusting head (6), internal threads are arranged on the inner wall of the inner hole, and the top of the adjusting screw rod (33) penetrates through the installation cylinder (7) and is threadedly connected inside the adjusting head (6).

6. The groundwater sampling device for groundwater water sample detection according to claim 5, characterized in that: On one side of the top of the movable rod (32), an upper sliding sealing plate (8) is fixedly connected. The upper sliding sealing plate (8) is slidably and sealingly connected to the mounting cylinder (7); on one side of the bottom of the movable cylinder (9), a mounting rod (13) is fixedly connected. The bottom of the mounting rod (13) is fixedly connected to the sealing head (15). A lower sliding sealing plate (14) is fixedly connected to the mounting rod (13). The lower sliding sealing plate (14) is slidably and sealingly connected to the mounting cylinder (7); a sealing space (11) is formed between the upper sliding sealing plate (8) and the lower sliding sealing plate (14). A first one-way valve (10) is arranged on the cylinder wall of the mounting cylinder (7), and the first one-way valve (10) is connected to the sealing space (11).

7. The groundwater sampling device for groundwater water sample detection according to claim 6, characterized in that: A pressure sensor (16) is arranged between the sealing head (15) and the mounting rod (13).

8. The groundwater sampling device for groundwater water sample detection according to claim 1, wherein: On one side of the bottom of the mounting cylinder (7), a filter screen (18) is arranged.

9. The groundwater sampling device for groundwater water sample detection according to claim 1, characterized in that: On one side of the sampling cylinder (26), a second one-way valve (30) is arranged.

10. The groundwater sampling device for groundwater water sample detection according to claim 1, characterized in that: The outer side of the discharge port (22) is provided with an external thread, and the discharge port (22) is externally threaded and connected to the bottom cover (21).

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