A multifunctional groundwater sampling device

Abstract

The present invention relates to the field of groundwater monitoring, and in particular to a multifunctional groundwater sampling device, including a rope, a sampling ring and a rotating rod I, etc.; each sampling ring upper end face and lower end face are installed with a plurality of electric rotating shafts I, and the rotating part of each electric rotating shaft I is fixedly connected with a rotating rod I, and the rotating rod I is driven to rotate by the electric rotating shaft I. The present invention puts the sampling ring and the submersible pump into the groundwater monitoring well together when washing the well, so that the submersible pump extracts the stagnant water and the impurities generated when the sampling ring and the submersible pump descend in the groundwater monitoring well, and then the sampling ring is used to perform stratified sampling of the groundwater after the groundwater is restored and the impurities such as silt are precipitated, thereby avoiding the problem that the existing sampling equipment cannot avoid hitting the well wall of the groundwater monitoring well, so that impurities such as dust or algae attached to the well wall fall into the groundwater, resulting in an increase in impurities in the groundwater and affecting the results of groundwater sampling.

Description

Technical Field

[0001] The invention relates to the field of groundwater monitoring, and in particular to a multifunctional groundwater sampling device. Background Art

[0002] In the process of groundwater monitoring, staff are required to take groundwater samples. Since the water inside the groundwater monitoring well is not flowing, especially for the monitoring well that has not been used for a long time, the water in the well may have been stagnant for a long time, resulting in the chemical composition of the water in the groundwater monitoring well being different from the actual chemical composition of the surrounding groundwater. Therefore, before groundwater sampling, staff are required to put a submersible pump into the groundwater monitoring well, and then use the submersible pump to pump out the stagnant water in the groundwater monitoring well, thereby washing the groundwater monitoring well and draining the stagnant water in the groundwater monitoring well to ensure that fresh groundwater is collected. The groundwater samples are taken, and then after the groundwater flows back into the groundwater monitoring well, after a period of time, when the impurities in the groundwater monitoring well have settled, the staff will put the sampling equipment into the groundwater monitoring well for sampling. However, because the walls of the groundwater monitoring wells may be attached with impurities such as dust or algae, and the groundwater monitoring wells are usually deep, the sampling equipment needs to be lowered a long distance, causing the sampling equipment to inevitably hit the walls of the groundwater monitoring wells, causing impurities such as dust or algae attached to the walls to fall into the groundwater, resulting in an increase in impurities in the groundwater, which affects the results of the groundwater sampling. Summary of the invention

[0003] In order to overcome the disadvantage that the sampling equipment cannot avoid colliding with the wall of the groundwater monitoring well, causing impurities such as dust or algae attached to the wall to fall into the groundwater, resulting in an increase in impurities in the groundwater and affecting the results of groundwater sampling, the present invention provides a multifunctional groundwater sampling equipment.

[0004] The technical scheme is as follows: a multifunctional groundwater sampling device, including a rope and a sampling ring; the rope is connected to a plurality of sampling rings, the lowest sampling ring is fixedly connected to the rope, and the remaining sampling rings are slidably connected to the rope; it also includes a rotating rod I, a two-way push rod, an extrusion ring and a limit block; a plurality of electric rotating shafts I are installed on the upper end face and the lower end face of each sampling ring, and the rotating part of each electric rotating shaft I is fixedly connected to a rotating rod I, and the rotating rod I is driven to rotate by the electric rotating shaft I; each rotating rod I is fixedly connected to an extensible and shrinkable water-proof membrane, and the water-proof membrane is fixedly connected to the adjacent sampling ring; each sampling ring is fixedly connected to a plurality of bidirectional push rods; all the bidirectional push rods on the same sampling ring, their upward telescopic ends are commonly fixedly connected to a squeeze ring, and their downward telescopic ends are commonly fixedly connected to another squeeze ring; each sampling ring is equipped with a plurality of electric rotating shafts II on the side, and the rotating part of each electric rotating shaft II is fixedly connected to a limit block for limiting the sampling position of the sampling ring, and the limit block is driven to rotate by the electric rotating shaft II.

[0005] Preferably, the rotating rod I is configured to be arc-shaped, the arc diameter of the rotating rod I is larger than the inner diameter of the sampling ring and smaller than the outer diameter of the sampling ring, and is concentric with the sampling ring.

[0006] Preferably, the extrusion ring is provided with a sealing portion.

[0007] Preferably, a rotating rod II and a protective film are also included; the sealing portion of each extrusion ring is rotatably connected to a rotating rod II via a torsion spring, and the rotating rod II is elliptical; initially, two adjacent rotating rods II are in close contact with each other in an inclined state and are located on the inner side of the sampling ring; each rotating rod II is fixedly connected to a protective film for protecting the sampling ring to prevent its inner wall from being contaminated, the protective film is retractable and deformable, and the protective film is fixedly connected to the adjacent sealing portion; initially, the two upper and lower adjacent protective films are fully unfolded under the pulling limit of the rotating rod II, and the combination is in the shape of a complete circular sleeve, and the inner side of the sampling ring is completely blocked.

[0008] Preferably, the sealing portion is provided with a plurality of avoidance grooves, and the rotating rod II is rotated to fit with the sealing portion and then passes through the avoidance grooves.

[0009] Preferably, a plurality of rubber blocks cooperating with the avoidance grooves are arranged on the rotating rod II.

[0010] Preferably, the rotating rod II is made of a deformable material.

[0011] Preferably, it also includes a fixed ring, a rotating block, an extrusion block I, an extrusion block II, a sliding rod, a telescopic rod and a limiting rod; the extrusion ring at the bottom of each sampling ring is slidably connected to a plurality of sliding rods, a limiting ring is arranged on the sliding rod, and a limiting plate is arranged on the upper end of the sliding rod; all the sliding rods on the same extrusion ring are fixedly connected to the fixed ring together; each fixed ring is rotatably connected to a plurality of rotating blocks, and the lower side of each extrusion ring adjacent to the fixed ring is also rotatably connected to a plurality of rotating blocks, and the rotating blocks on the fixed ring correspond to the positions of the rotating blocks on the lower side of the extrusion ring; every two upper and lower corresponding rotating blocks are rotatably connected to the extrusion block I together; the extrusion ring at the bottom of each sampling ring is fixedly connected to the extrusion block II, and the positions of the extrusion blocks I and II correspond to the positions of the rope, and the extrusion blocks I and II cooperate to clamp the rope; the extrusion ring at the bottom of each sampling ring is fixedly connected to a plurality of telescopic rods; every two adjacent telescopic rods are fixedly connected to the limiting rod together.

[0012] Preferably, the extrusion block I and the extrusion block II are made of rubber material, and a plurality of convex strips are arranged on the facing sides of the extrusion block I and the extrusion block II.

[0013] Preferably, a slope for guiding the submersible pump to move and avoid is provided below the fixing ring.

[0014] Beneficial effects of the present invention: The present invention puts the sampling ring and the submersible pump into the groundwater monitoring well together during well washing, so that the submersible pump can extract the stagnant water and the impurities generated when the sampling ring and the submersible pump descend in the groundwater monitoring well at the same time, and then the sampling ring is used to sample the groundwater in layers after the groundwater is restored and the impurities such as silt are precipitated, thereby avoiding the problem that the existing sampling equipment cannot avoid colliding with the well wall of the groundwater monitoring well, causing impurities such as dust or algae attached to the well wall to fall into the groundwater, resulting in an increase in impurities in the groundwater and affecting the results of groundwater sampling;

[0015] The present invention protects the inner wall of the sampling ring by rotating the rod II and the protective film, so as to avoid the problem that when the submersible pump moves upward through the sampling ring, the sludge attached to the submersible pump is transferred to the inner wall of the sampling ring, causing the groundwater subsequently stored in the sampling ring to be affected by the sludge.

[0016] The present invention further fixes the remaining sampling rings through the lowest sampling ring and the rope, thereby increasing the fixing effect between the sampling ring and the inner wall of the groundwater monitoring well, avoiding the problem that the submersible pump easily moves up and hits and squeezes the sampling ring, causing the sampling position of the sampling ring to move up, and affecting the monitoring result. The submersible pump is guided to move to the middle of the sampling ring through the fixed ring, thereby reducing the squeezing force of the submersible pump on the fixed ring, thereby further avoiding the submersible pump moving up and hitting and squeezing the sampling ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure disclosed by the multifunctional groundwater sampling device of the present invention;

[0018] Figure 2 It is a schematic structural diagram of a rope and a sampling ring disclosed by the multifunctional groundwater sampling device of the present invention from a front view perspective;

[0019] Figure 3 A schematic diagram of the combined structure of a sampling ring, an extrusion ring and a limit block disclosed in the multifunctional groundwater sampling device of the present invention;

[0020] Figure 4 An exploded view of a sampling ring and a squeezing ring disclosed in the multifunctional groundwater sampling device of the present invention;

[0021] Figure 5 A schematic diagram of the installation position of the bidirectional push rod disclosed by the multifunctional groundwater sampling device of the present invention;

[0022] Figure 6 It is a schematic diagram of the combined structure of the extrusion ring, the rotating rod II and the protective film disclosed by the multifunctional groundwater sampling device of the present invention;

[0023] Figure 7 A diagram showing the rotation state of the rotating rod II disclosed by the multifunctional groundwater sampling device of the present invention;

[0024] Figure 8 A cross-sectional view of an extrusion ring and a fixing ring disclosed in the multifunctional groundwater sampling device of the present invention;

[0025] Fig. 9 This is a moving state diagram of the extrusion block I disclosed in the multifunctional groundwater sampling device of the present invention.

[0026] Explanation of the accompanying drawings: 1-rope, 2-sampling ring, 3-rotating rod I, 4-bidirectional push rod, 5-extrusion ring, 6-limiting block, 101-rotating rod II, 102-protective film, 201-fixing ring, 202-rotating block, 203-extrusion block I, 204-extrusion block II, 205-sliding rod, 206-telescopic rod, 207-limiting rod, 3001-waterproof membrane, 5001-sealing part, 20501-limiting ring, 20502-limiting plate, 100-groundwater monitoring well, 200-submersible pump. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Example 1

[0029] A multifunctional groundwater sampling device, such as Figure 1-Figure 8As shown, it includes a rope 1 and a sampling ring 2; the rope 1 is connected to a plurality of sampling rings 2, the bottom sampling ring 2 is fixedly connected to the rope 1, and the remaining sampling rings 2 are slidably connected to the rope 1;

[0030] It also includes a rotating rod Ⅰ3, a two-way push rod 4, an extrusion ring 5 and a limit block 6; each sampling ring 2 is installed with a plurality of electric rotating shafts Ⅰ on the upper end face and the lower end face, and the rotating part of each electric rotating shaft Ⅰ is fixedly connected to a rotating rod Ⅰ3; each rotating rod Ⅰ3 is fixedly connected to an extendable and contractible water-proof membrane 3001, and the water-proof membrane 3001 is fixedly connected to the adjacent sampling ring 2, and by rotating the rotating rod Ⅰ3, the rotating rod Ⅰ3 pulls the water-proof membrane 3001 to expand it, covering the upper and lower ends of the sampling ring 2, and limiting the groundwater in the sampling ring 2 for sampling; each sampling ring 2 is fixedly connected to two two-way push rods 4; all the two-way push rods 4 on the same sampling ring 2, their upward telescopic ends are fixedly connected to a squeeze ring 5, and their downward telescopic ends are fixedly connected to another squeeze ring 5; two electric rotating shafts Ⅱ are installed on the side of each sampling ring 2, and the rotating part of each electric rotating shaft Ⅱ is fixedly connected to a limit block 6.

[0031] The rotating rod I3 is configured to be arc-shaped, the arc diameter of the rotating rod I3 is larger than the inner diameter of the sampling ring 2 and smaller than the outer diameter of the sampling ring 2 , and is concentric with the sampling ring 2 .

[0032] The pressing ring 5 is provided with a sealing portion 5001 .

[0033] It also includes a rotating rod Ⅱ101 and a protective film 102; the sealing part 5001 of each extrusion ring 5 is rotatably connected to a rotating rod Ⅱ101 through a torsion spring, and the rotating rod Ⅱ101 is elliptical; initially, two adjacent rotating rods Ⅱ101 are attached to each other in an inclined state, and are located on the inner side of the sampling ring 2; each rotating rod Ⅱ101 is fixedly connected to a protective film 102, the protective film 102 can be stretched and deformed, and the protective film 102 is fixedly connected to the adjacent sealing part 5001; initially, the two upper and lower adjacent protective films 102 are fully unfolded under the pulling limit of the rotating rod Ⅱ101, and the combination is a complete circular sleeve shape, and the inner side of the sampling ring 2 is completely blocked.

[0034] The sealing part 5001 is provided with two avoidance grooves, and the rotating rod II 101 rotates to fit with the sealing part 5001 and then passes through the avoidance grooves. The avoidance grooves prevent the rotating rod II 101 from pressing against the sealing part 5001, thereby improving the squeezing effect on the water-isolating membrane 3001.

[0035] Two rubber blocks are arranged on the rotating rod II 101 .

[0036] The rotating rod II 101 is made of a deformable material, so that when the rotating rod II 101 has not completely rotated to the outside of the sampling ring 2, the rotating rod II 101 can be squeezed by the rotating rod I 3 to bend and deform, thereby avoiding the rotation of the rotating rod I 3 in advance, thereby improving the sampling efficiency.

[0037] The working steps of the above embodiment are: first, the staff fixes the rope 1 on the external winding device, and then when the staff performs the well washing operation on the groundwater monitoring well 100, before the staff puts the submersible pump 200 into the groundwater monitoring well 100, the submersible pump 200 is inserted into all the sampling rings 2, and then the sampling ring 2 and the submersible pump 200 are put into the groundwater monitoring well 100 together through different winding devices, and then during the descent of the sampling ring 2, it will hit the inner wall of the groundwater monitoring well 100, so that the inner wall of the groundwater monitoring well 100 Dust or algae fall and form impurities in the groundwater. When the top sampling ring 2 descends to the height required for sampling, the electric shaft II is controlled to drive the limit block 6 to rotate in the direction close to the inner wall of the groundwater monitoring well 100. When the limit block 6 contacts the inner wall of the groundwater monitoring well 100, the limit block 6 presses against the inner wall of the groundwater monitoring well 100 to generate friction, and the top sampling ring 2 is fixed at the sampling height, which is convenient for subsequent sampling of groundwater. Since the upper sampling ring 2 is slidably connected to the rope 1, it will not affect the descent of the remaining sampling rings 2 and rope 1.

[0038] When the second sampling ring 2 descends to the second position where sampling is required, the corresponding limit block 6 is controlled to rotate, and the second sampling ring 2 is fixed at the position where sampling is required, and so on, until the lowest sampling ring 2 is located at the height position where sampling is required, and at the same time, the winding device connected to the rope 1 is controlled to stop rotating, while the winding device connected to the submersible pump 200 continues to rotate. When the submersible pump 200 is placed at the bottom of the groundwater monitoring well 100, the stagnant water in the groundwater monitoring well 100 is then removed by the submersible pump 200. The water is pumped out, and the impurities scraped off when the sampling ring 2 is lowered are pumped out, so as to prevent the impurities dropped when the sampling ring 2 is lowered from affecting the subsequent groundwater sampling. Then, after the groundwater in the groundwater monitoring well 100 is drained and the impurities are pumped out, the staff reverses and pulls the submersible pump 200 upward through the winding device. Since the sampling ring 2 is in a circular shape and its inner diameter is larger than the outer diameter of the submersible pump 200, the sampling ring 2 will not affect the upward movement of the submersible pump 200. The sampling ring 2 is fixed at the position where sampling is required in the groundwater monitoring well 100. It should be noted that since the submersible pump 200 needs to move downward to the bottom of the groundwater monitoring well 100, a large amount of silt at the bottom of the groundwater monitoring well 100 will adhere to the submersible pump 200, so that when the submersible pump 200 moves upward through the sampling ring 2, the silt attached to the submersible pump 200 will be transferred to the inner wall of the sampling ring 2, causing the subsequent groundwater stored in the sampling ring 2 to be affected by the silt. Therefore, by Under the limiting effect of the ring 5, the two adjacent rotating rods II 101 are tightly attached to each other. At this time, the adjacent rotating rods II 101 and the protective film 102 are combined into a circular ring shape and are in a state of being in contact with the inner wall of the sampling ring 2, so that the inner wall of the sampling ring 2 is protected by the rotating rods II 101 and the protective film 102, thereby preventing the silt attached to the submersible pump 200 from being transferred to the inner wall of the sampling ring 2 when the submersible pump 200 moves upward through the sampling ring 2, resulting in the problem that the groundwater subsequently stored in the sampling ring 2 will be affected by the silt.

[0039] After a period of time, the groundwater flows back into the groundwater monitoring well 100 and covers all the sampling rings 2 again. Since the silt and other impurities at the bottom of the groundwater monitoring well 100 cannot be completely pumped out by the submersible pump 200, the silt and other impurities at the bottom of the groundwater monitoring well 100 will be washed up when the groundwater flows back in. Therefore, it is necessary to wait for a period of time for the silt and other impurities washed up in the groundwater to settle again before sampling. Subsequently, the extrusion ring 5 is pushed away from the sampling ring 2 by the two-way push rod 4, so that the distance between the extrusion ring 5 and the sampling ring 2 is increased, which is convenient for the subsequent rotation of the rotating rod Ⅰ3 and prevents the extrusion ring 5 from blocking the rotation of the rotating rod Ⅰ3; then, the rotating rod Ⅰ3 is driven by the electric shaft Ⅰ connected to the rotating rod Ⅰ3 to Figure 5Taking the perspective as an example, rotate counterclockwise. During the rotation of rotating rod Ⅰ3, the water-proof membrane 3001 will be gradually unfolded. When rotating rod Ⅰ3 rotates to contact with rotating rod Ⅱ101, rotating rod Ⅰ3 squeezes rotating rod Ⅱ101, forcing rotating rod Ⅱ101 to rotate in the direction close to the adjacent extrusion ring 5. Then, after rotating rod Ⅰ3 rotates 180 degrees, rotating rod Ⅰ3 will fit with sampling ring 2 again, and rotating rod Ⅱ101 will also enter the avoidance groove of sealing part 5001, and fill the avoidance groove of sealing part 5001 with the rubber block arranged on rotating rod Ⅱ101, so as to avoid the avoidance groove affecting the subsequent extrusion effect of sealing part 5001 on water-proof membrane 3001, so that rotating rod Ⅱ101 fits with extrusion ring 5, as shown in the figure. Figure 7 In the state shown, the rotating rod II 101 is prevented from affecting the squeezing of the sealing part 5001 on the waterproof membrane 3001. At this time, the waterproof membrane 3001 covers the upper and lower ends of the sampling ring 2, and then the squeezing ring 5 is pulled by the two-way push rod 4 to move in the direction close to the sampling ring 2. When the squeezing ring 5 contacts the waterproof membrane 3001, the sealing part 5001 squeezes the waterproof membrane 3001 until it is tightly attached to the sampling ring 2, so that the groundwater cannot flow out from between the sampling ring 2 and the waterproof membrane 3001, thereby storing the groundwater at the sampling position in the sampling ring 2, and then the rope 1 is wound up by the external winding device, thereby pulling the rope 1 to move upward, and at the same time controlling the electric shaft II connected to the limit block 6 to drive the limit block 6 to rotate in the direction close to the sampling ring 2, so that the limit Block 6 no longer presses against the inner wall of the groundwater monitoring well 100, and the limit block 6 no longer limits the sampling ring 2. Then the rope 1 pulls the lowest sampling ring 2 to move upward, and then when it passes through the remaining sampling rings 2, it will drive the remaining sampling rings 2 to move upward. Since the groundwater in the sampling ring 2 is separated by the waterproof membrane 3001, the groundwater in the sampling ring 2 will not be affected during the upward movement of the sampling ring 2. Then, when all the sampling rings 2 move upward to the top of the groundwater monitoring well 100, the staff will hoist all the sampling rings 2 above different storage containers, and then control the two-way push rod 4 to push the extrusion ring 5 to move away from the sampling ring 2, and at the same time control the electric shaft I connected to the rotating rod I3 to drive the rotating rod I3 to Figure 5 Taking the perspective as an example, the sampling ring 2 is rotated clockwise to make the groundwater stored in the sampling ring 2 flow out to the storage container, thereby completing the sampling of the groundwater. In the above process, multiple sampling rings 2 are used to sample groundwater at different depths at the same time, avoiding the need for the sampling device in the prior art to descend to different depths for sampling when performing stratified sampling, thereby saving the time required for sampling and increasing the efficiency of sampling.

[0040] Example 2

[0041] On the basis of Example 1, Figure 8 and Fig. 9As shown, it also includes a fixed ring 201, a rotating block 202, an extrusion block I 203, an extrusion block II 204, a sliding rod 205, a telescopic rod 206 and a limiting rod 207; the extrusion ring 5 at the bottom of each sampling ring 2 is slidably connected to four sliding rods 205, a limiting ring 20501 is provided on the sliding rod 205, and a limiting plate 20502 is provided on the upper end of the sliding rod 205; all the sliding rods 205 on the same extrusion ring 5 are fixedly connected to the fixed ring 201; each fixed ring 201 is rotatably connected to two rotating blocks 202, and each extrusion ring 5 adjacent to the fixed ring 201 is connected to the fixed ring 201. There are also two rotating blocks 202 rotatably connected to the lower side, and the rotating block 202 on the fixed ring 201 corresponds to the position of the rotating block 202 on the lower side of the extrusion ring 5; every two corresponding rotating blocks 202 are rotatably connected to an extrusion block I 203; the extrusion ring 5 at the bottom of each sampling ring 2 is fixedly connected to an extrusion block II 204, and the positions of the extrusion blocks I 203 and II 204 correspond to the position of the rope 1; the extrusion ring 5 at the bottom of each sampling ring 2 is fixedly connected to a plurality of telescopic rods 206; every two adjacent telescopic rods 206 are fixedly connected to a limiting rod 207.

[0042] The extrusion block I 203 and the extrusion block II 204 are made of rubber material, and the facing sides of the extrusion block I 203 and the extrusion block II 204 are provided with a plurality of convex strips, which facilitate the extrusion block I 203 and the extrusion block II 204 to clamp and fix the rope 1.

[0043] An inclined surface is provided below the fixing ring 201 .

[0044] The working steps of the above embodiment are: when the lowest sampling ring 2 is lowered to the deepest sampling position, the winding device is controlled to stop lowering the rope 1 and the rope 1 is locked, that is, the lowering length of the rope 1 is determined, and at this time, there is no need to control the limit block 6 on the lowest sampling ring 2 to rotate outward, that is, there is no need to fix the lowest sampling ring 2; because during the upward movement of the submersible pump 200, the edge of the submersible pump 200 will collide and squeeze the sampling ring 2, and the limit block 6 is fixed by the friction between it and the groundwater monitoring well 100, when the submersible pump 200 When the squeezing force is greater than the friction force between the limit block 6 and the sampling ring 2, the submersible pump 200 will drive the sampling ring 2 to move upward, causing the sampling position of the sampling ring 2 to shift upward, which affects the monitoring accuracy at depth. Therefore, when the submersible pump 200 moves upward through the fixed ring 201, the submersible pump 200 will squeeze the fixed ring 201, causing the fixed ring 201 to move upward. Since the rotating block 202 is initially inclined toward the squeezing block II 204, during the upward movement of the submersible pump 200, when the submersible pump 200 moves upward through the fixed ring 201, the rotating block 202 is initially inclined toward the squeezing block II 204. When passing the lowest sampling ring 2, if the submersible pump 200 hits the fixing ring 201 of the lowest sampling ring 2, causing the lowest sampling ring 2 to deviate upward, the submersible pump 200 continues to move upward, and under the guidance of the lower inclined surface of the fixing ring 201, the submersible pump 200 gradually passes over the fixing ring 201 and continues to move upward at the center of the sampling ring 2. At this time, since the lowest sampling ring 2 is not fixed, the lowest sampling ring 2 will fall back to its original position under the action of gravity. After the submersible pump 200 passes over the lowest sampling ring 2, the lower sampling ring 2 will be controlled to move upward. The limit block 6 on the sample ring 2 rotates in the direction away from the sampling ring 2, thereby pressing against the inner wall of the groundwater monitoring well 100, thereby fixing the position of the lowest sampling ring 2, that is, fixing the corresponding sampling depth; when the submersible pump 200 moves upward to contact the middle and upper sampling rings 2, if the submersible pump 200 hits and squeezes the fixed ring 201, the fixed ring 201 moves toward the direction close to the squeezing block II 204, forcing the rotating block 202 to rotate toward the direction close to the squeezing block II 204, thereby driving the squeezing block I 203 to move toward the direction close to the squeezing block II 204, as shown in Fig. 9In the state shown, the rope 1 is between the extrusion block II 204 and the extrusion block I 203, so after the extrusion block I 203 moves, the rope 1 is clamped and fixed between the extrusion block II 204 and the extrusion block I 203, and at the same time, when the limit ring 20501 moves upward to the limit rod 207, the limit ring 20501 squeezes the limit rod 207, so that the adjacent limit rods 207 move back to each other, and the telescopic rod 206 is compressed. Subsequently, after the limit ring 20501 moves above the limit rod 207, the limit rod 207 is no longer squeezed, and the telescopic rod 206 pushes the limit rod 207 to reset, thereby limiting the limit ring 20501, so that the sliding rod 205 and the fixed ring 201 cannot naturally move downward to reset, so the extrusion block I 203 and the extrusion block II 204 will keep the rope 1 The state of clamping and fixing; so that the subsequent sampling ring 2 will be in a fixed state with the rope 1; then when the submersible pump 200 continues to move upward to squeeze the sampling ring 2, since the rope 1 is clamped and fixed between the squeezing block II 204 and the squeezing block I 203, and the rope 1 is fixedly connected to the lowest sampling ring 2, the lowest sampling ring 2 will be fixed to the rope 1, so the squeezing force can be transmitted to the lowest sampling ring 2 through the rope 1, so that the remaining sampling rings 2 are further fixed through the lowest sampling ring 2 and the rope 1, thereby increasing the fixing effect between the sampling ring 2 and the inner wall of the groundwater monitoring well 100, avoiding the problem that the submersible pump 200 moves upward and easily hits and squeezes the sampling ring 2, causing the sampling position of the sampling ring 2 to move upward, which affects the monitoring results.

[0045] It should be noted that since the lower end of the fixing ring 201 is provided with a bevel, when the submersible pump 200 moves upward to contact the fixing ring 201, the fixing ring 201 will guide the submersible pump 200 to move toward the middle of the sampling ring 2, thereby reducing the squeezing force of the submersible pump 200 on the fixing ring 201, thereby further preventing the submersible pump 200 from moving upward and impacting the upward movement of the sampling ring 2.

[0046] The above description is only an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention should be included in the protection scope of the present invention. The contents not elaborated in detail in the present invention belong to the existing technologies known to those skilled in the art.

Claims

1. A multifunctional groundwater sampling device, comprising a rope (1) and a sampling ring (2); the rope (1) is connected to a plurality of sampling rings (2), the lowest sampling ring (2) is fixedly connected to the rope (1), and the remaining sampling rings (2) are slidably connected to the rope (1); characterized in that: It also includes a rotating rod I (3), a two-way push rod (4), an extrusion ring (5) and a limit block (6); each sampling ring (2) is equipped with a plurality of electric rotating shafts I on the upper end surface and the lower end surface, and the rotating part of each electric rotating shaft I is fixedly connected to a rotating rod I (3), and the rotating rod I (3) is driven to rotate by the electric rotating shaft I; each rotating rod I (3) is fixedly connected to an extendable and contractible water-proof membrane (3001), and the water-proof membrane (3001) is fixedly connected to the adjacent sampling ring (2); each sampling ring (2 ) are fixedly connected to a plurality of bidirectional push rods (4); all the bidirectional push rods (4) on the same sampling ring (2) have their upward telescopic ends fixedly connected to a squeeze ring (5), and their downward telescopic ends fixedly connected to another squeeze ring (5); a plurality of electric rotating shafts II are mounted on the side of each sampling ring (2), and the rotating portion of each electric rotating shaft II is fixedly connected to a limit block (6) for limiting the sampling position of the sampling ring (2), and the limit block (6) is driven to rotate by the electric rotating shaft II; The extrusion ring (5) is provided with a sealing portion (5001); It also comprises a rotating rod II (101) and a protective film (102); the sealing portion (5001) of each extrusion ring (5) is rotatably connected to a rotating rod II (101) via a torsion spring, and the rotating rod II (101) is elliptical; initially, two adjacent rotating rods II (101) fit each other in an inclined shape and are located inside the sampling ring (2); each rotating rod II (101) is fixedly connected to a protective film (102) for protecting the sampling ring (2) and preventing the inner wall thereof from being contaminated, the protective film (102) being scalable and deformable, and the protective film (102) is fixedly connected to the adjacent sealing portion (5001); initially, the two upper and lower adjacent protective films (102) are fully unfolded under the pulling restriction of the rotating rod II (101), and the combination is in the shape of a complete circular sleeve, and the inner side of the sampling ring (2) is completely covered.

2. A multifunctional groundwater sampling device according to claim 1, characterized in that: The rotating rod I (3) is arranged in an arc shape, the arc diameter of the rotating rod I (3) is larger than the inner diameter of the sampling ring (2) and smaller than the outer diameter of the sampling ring (2), and is concentric with the sampling ring (2).

3. A multifunctional groundwater sampling device according to claim 1, characterized in that: The sealing portion (5001) is provided with a plurality of avoidance grooves, and the rotating rod II (101) is rotated until it is in contact with the sealing portion (5001) and then passes through the avoidance grooves.

4. A multifunctional groundwater sampling device according to claim 3, characterized in that: A plurality of rubber blocks cooperating with the avoidance grooves are arranged on the rotating rod II (101).

5. The multifunctional groundwater sampling device according to claim 1, characterized in that: The rotating rod II (101) is configured to be made of a deformable material.

6. A multifunctional groundwater sampling device according to claim 5, characterized in that: The extrusion ring (201) further comprises a fixed ring (201), a rotating block (202), an extrusion block I (203), an extrusion block II (204), a sliding rod (205), a telescopic rod (206) and a limiting rod (207); the extrusion ring (5) located below each sampling ring (2) is slidably connected to a plurality of sliding rods (205), a limiting ring (20501) is provided on the sliding rod (205), and a limiting plate (20502) is provided on the upper end of the sliding rod (205); all the sliding rods (205) on the same extrusion ring (5) are fixedly connected to the fixed ring (201); each fixed ring (201) is rotatably connected to a plurality of rotating blocks (202), and the lower side of each extrusion ring (5) adjacent to the fixed ring (201) is also rotatably connected to a plurality of rotating blocks (202). The rotating block (202) is provided on the fixed ring (201), and the position of the rotating block (202) on the lower side of the extrusion ring (5) corresponds to that of the rotating block (202); every two corresponding rotating blocks (202) are rotatably connected to an extrusion block I (203); the extrusion ring (5) located below on each sampling ring (2) is fixedly connected to an extrusion block II (204), and the positions of the extrusion blocks I (203) and II (204) correspond to the positions of the rope (1), and the extrusion blocks I (203) and II (204) cooperate to clamp the rope (1); the extrusion ring (5) located below on each sampling ring (2) is fixedly connected to a plurality of telescopic rods (206); and every two adjacent telescopic rods (206) are fixedly connected to a limiting rod (207).

7. A multifunctional groundwater sampling device according to claim 6, characterized in that: The extrusion block I (203) and the extrusion block II (204) are made of rubber material, and a plurality of convex strips are arranged on the facing sides of the extrusion block I (203) and the extrusion block II (204).

8. The multifunctional groundwater sampling device according to claim 6, characterized in that: An inclined surface for guiding the submersible pump (200) to move and avoid is provided below the fixing ring (201).

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