Sampling device for coal mine underground water detection

Abstract

The invention discloses a sampling device for coal mine underground water detection, and relates to the technical field of coal mine underground water detection.The sampling device comprises a take-up device and a water taking container, the top end of the water taking container is connected with the take-up device through a connecting line, the connecting line is wound around the outer portion of the take-up device, and a water inlet base is installed at the bottom end of the water taking container in an embedded mode; the internal space of the water taking container can be increased by exhausting the gas in the expanded air bag, liquid flowing into the water taking container is changed according to the increased space of the water taking container, and the water taking container is in a negative pressure state when the air bag contracts, so that the liquid can enter the water taking container more easily; the air bag in the expanded state is used for reducing the space in the water taking container, and after the water taking container is taken out of the mine water, the air bag can be expanded to reduce the space in the water taking container, so that the liquid in the water taking container can be quickly discharged.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine groundwater detection, and specifically to a sampling device for coal mine groundwater detection. Background Technique

[0002] Sampling for coal mine groundwater detection is a very important task, which helps to ensure water quality safety and environmental protection during the coal mine production process. According to different detection requirements, the items to be measured are determined, such as heavy metal ions, organic pollutants, suspended solids, etc. When detecting, the required sampling tools and equipment are prepared, such as sampling buckets, samplers, filter screens, containers, etc. The groundwater is detected through a sampler. Specifically, a special groundwater sampler, such as a pump sampler or a manual sampler, is used to sample from a specified depth. Sampling for coal mine groundwater detection needs to be carried out strictly in accordance with relevant standards and operating procedures to ensure the accuracy and reliability of the detection results.

[0003] It should be noted that when detecting coal mine groundwater, sampling needs to be carried out through a sampler to take some water sources in the mine. Since the sampler is a container with a relatively small opening when sampling, when the liquid enters the inside of the container, the air inside the container needs to be discharged before the liquid can flow in, thus slowing down the speed of the liquid entering the inside of the container. During the process of lifting the sampler out of the water, it is easy for some liquid to leak from the water sampling container. Also, when the sample is taken, the liquid needs to be discharged from the sampler. The container with a small opening makes the flowing-out liquid relatively slow, and the internal capacity of the sampler cannot be changed according to needs when collecting the liquid. Only by measuring the required amount of water again after taking the liquid, which is rather troublesome. Summary of the Invention

[0004] The purpose of the present invention is to provide a sampling device for coal mine groundwater detection to solve the problems raised in the above background technique: the sampler is a container with a relatively small opening, when the liquid enters the inside of the container, the air inside the container needs to be discharged before the liquid can flow in, thus slowing down the speed of the liquid entering the inside of the container. During the process of lifting the sampler out of the water, it is easy for some liquid to leak from the water sampling container. Also, when the sample is taken, the liquid needs to be discharged from the sampler. The container with a small opening makes the flowing-out liquid relatively slow.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A sampling device for detecting underground water in coal mines, comprising a wire reel and a water intake container. The top end of the water intake container is connected to the wire reel through a connecting wire, and the connecting wire is wound around the outside of the wire reel. The bottom end of the water intake container is embedded with a water inlet base. Inside the water intake container and above the water inlet base, there is a water volume control mechanism. The water volume control mechanism includes a fixed base. The fixed base is arranged at the lower end inside the water inlet base, and the cylindrical surface of the fixed base is provided with a first air pump and a second air pump. The air outlet of the first air pump and the air inlet of the second air pump are both communicated with the inside of the fixed base, and both the first air pump and the second air pump are installed on the cylindrical surface of the water intake container. The top end of the fixed base is provided with an airbag, and the airbag is arranged vertically inside the water intake container. The expansion state and contraction state of the airbag are used to control the water volume in the water intake container. A fixed ring is welded to the cylindrical surface of the fixed base, and two connecting rods are welded inside the fixed ring. A number of movable rings are arranged between the two connecting rods, and the inside of the movable ring is slidably connected to the connecting rod, and the airbag is connected to the inside of each movable ring.

[0007] As a preferred technical solution of the present invention, connection holes are provided on both sides of the movable ring, the two connecting rods are respectively located inside the two connection holes, and first telescopic springs are provided at the top ends of the two connecting rods. The first telescopic springs are located on the upper surface of the uppermost movable ring.

[0008] As a preferred technical solution of the present invention, fixing rings are welded to the top ends of the two connecting rods, and the diameter of the fixing ring is larger than the diameter of the first telescopic spring. The length of the first telescopic spring is adapted to the length of the connecting rod. The first telescopic spring is used to drive the movable ring and the airbag to move.

[0009] As a preferred technical solution of the present invention, when the airbag is in an expanded state, the air outlet of the first air pump conveys air into the airbag, and the air inlet of the second air pump stops working. The expanded airbag is used to reduce the space in the water intake container.

[0010] As a preferred technical solution of the present invention, when the airbag is in a contracted state, the air outlet of the first air pump stops working, and the air inlet of the second air pump sucks the gas in the airbag. The contracted airbag is used to increase the space in the water intake container.

[0011] As a preferred technical solution of the present invention, an inlet water control structure is provided inside the wire take-up device and below the fixed base. The inlet water control structure includes a sliding sleeve. The sliding sleeve is arranged in the middle of the bottom end of the fixed base and is slidably connected to the inside of the fixed base. Inside the water intake container and below the fixed base, an intermediate seat is welded. At the top of the intermediate seat, a first lifting plate is provided, and the shape of the first lifting plate is adapted to the shape of the intermediate seat. The first lifting plate is used to open and close the liquid passage in the water inlet base. A fixed rod is welded in the middle of the first lifting plate, and a support plate is welded in the middle of the inside of the intermediate seat. The middle of the support plate is slidably connected to the fixed rod, and a second telescopic spring is sleeved outside the fixed rod. The second telescopic spring is used to move the first lifting plate upward.

[0012] As a preferred technical solution of the present invention, the first lifting plate and the sliding sleeve move synchronously. The second telescopic spring is located between the support plate and the first lifting plate. A reserved groove is opened inside the support plate, and the middle of the reserved groove is slidably connected to the fixed rod. The bottom end of the fixed rod is slidably connected to the bottom end of the water inlet base.

[0013] As a preferred technical solution of the present invention, the airbag in the contracted state is used to move the sliding sleeve upward, and the intermediate seat is separated from the first lifting plate. The airbag in the inflated state is used to move the sliding sleeve downward, and the intermediate seat is closed with the first lifting plate.

[0014] As a preferred technical solution of the present invention, a coal cleaning structure is provided inside the water inlet base and at the bottom end of the fixed rod. The coal cleaning structure includes water permeable holes. The water permeable holes are opened in a circle around the water inlet base. A second lifting plate is welded at the bottom end of the fixed rod. The shape of the second lifting plate is adapted to the internal shape of the water inlet base. At the edge of the second lifting plate and corresponding to each water permeable hole, a fixed hole is opened. Inside each fixed hole, a water passing column and a third telescopic spring are provided. One end of the water passing column is located inside the fixed hole, and the water passing column is used to remove the granular coal accumulated inside the water permeable hole.

[0015] As a preferred technical solution of the present invention, the edge of the second lifting plate is slidably connected to the inside of the water inlet base. The shape of the water permeable hole is frustum-shaped, and the tip shape of the water passing column is frustum-shaped. The water passing column slides inside the fixed hole, and the third telescopic spring is used to ensure that the water passing column is always in contact with each water permeable hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] A water volume control mechanism is provided. By discharging the gas inside the inflated airbag, the internal space of the water intake container can be increased. According to the increased space of the water intake container, the liquid flowing into the water intake container can be changed. And when the airbag contracts, the water intake container is in a negative pressure state, which is more conducive to the liquid entering the interior of the water intake container;

[0018] The airbag in the inflated state is used to reduce the space in the water intake container. After taking the water intake container out of the mine water, at this time, the airbag can be inflated to make the space in the water intake container smaller, which is conducive to quickly discharging the liquid in the water intake container;

[0019] An inlet water control structure is provided. Only by discharging the air inside the airbag can the first lifting plate be moved upward. At this time, the liquid in the mine flows into the interior of the water intake container. The opening and closing of the liquid flow channel are controlled by the expansion or contraction of the airbag. After taking the liquid, the first lifting plate and the middle seat can be closed by inflating the airbag to prevent the liquid from flowing out from the middle seat. The first lifting plate can only be opened by pushing the bottom end of the fixed rod;

[0020] A coal cleaning structure is provided. When the first lifting plate rises or falls, it can drive the water passing column on the second lifting plate to rise and fall. The water passing column can clean the residual granular coal blocks in the water permeable holes to prevent the granular coal blocks from accumulating at the water permeable holes. Brief Description of the Drawings

[0021] For the convenience of those skilled in the art to understand, the present invention will be further described below in conjunction with the drawings.

[0022] Figure 1 It is the main structure diagram of a sampling device for detecting underground water in coal mines according to the present invention;

[0023] Figure 2 It is the internal schematic diagram of the water intake container of a sampling device for detecting underground water in coal mines according to the present invention;

[0024] Figure 3 It is the schematic diagram of the water volume control mechanism of a sampling device for detecting underground water in coal mines according to the present invention;

[0025] Figure 4 It is the schematic diagram of the first air pump and the second air pump of a sampling device for detecting underground water in coal mines according to the present invention;

[0026] Figure 5 It is the schematic diagram of the connection hole and the first telescopic spring of a sampling device for detecting underground water in coal mines according to the present invention;

[0027] Figure 6 It is the schematic diagram of the contracted state of the airbag of a sampling device for detecting underground water in coal mines according to the present invention;

[0028] Figure 7Schematic diagram of the water inlet control structure of a sampling device for detecting coal mine groundwater according to the present invention;

[0029] Figure 8 Schematic diagram of the opening of the first lifting plate of a sampling device for detecting coal mine groundwater according to the present invention;

[0030] Figure 9 Schematic diagram of the coal cleaning structure of a sampling device for detecting coal mine groundwater according to the present invention;

[0031] Figure 10 Schematic diagram of the third telescopic spring of a sampling device for detecting coal mine groundwater according to the present invention.

[0032] In the figure: 1, wire reel; 2, connecting wire; 3, water intake container; 4, water inlet base; 5, water volume control mechanism; 6, water inlet control structure; 7, coal cleaning structure; 51, fixed base; 52, first air pump; 53, second air pump; 54, airbag; 55, movable ring; 56, connection hole; 57, connecting rod; 58, first telescopic spring; 59, fixed ring; 61, intermediate seat; 62, support plate; 63, sliding sleeve; 64, first lifting plate; 65, fixed rod; 66, second telescopic spring; 67, reserved groove; 71, water permeable hole; 72, second lifting plate; 73, water passing column; 74, fixing hole; 75, third telescopic spring. Detailed implementation manners

[0033] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. 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.

[0034] Embodiment 1:

[0035] Please refer to Figures 1-6As shown in the figure, a sampling device for detecting coal mine groundwater includes a wire reel 1 and a water intake container 3. The top end of the water intake container 3 is connected to the wire reel 1 through a connecting wire 2, and the connecting wire 2 is wound around the outside of the wire reel 1. One end of the connecting wire 2 is connected to the water intake container 3. The connecting wire 2 can be wound around the outside of the wire reel 1. An inlet base 4 is embedded at the bottom end of the water intake container 3. The water intake container 3 is immersed in the mine water source. The center of gravity of the water intake container 3 is located at the bottom end of the water intake container 3, and the water source enters the inside of the water intake container 3 from the inlet base 4 at the bottom end of the water intake container 3. A water volume control mechanism 5 is arranged inside the water intake container 3 and above the inlet base 4. The water volume control mechanism 5 includes a fixed base 51. The fixed base 51 is arranged at the lower end inside the inlet base 4. The fixed base 51 does not affect the liquid at the bottom end of the water intake container 3 from flowing past the edge of the fixed base 51. A first air pump 52 and a second air pump 53 are arranged on the cylindrical surface of the fixed base 51. Both the first air pump 52 and the second air pump 53 are diaphragm pumps. The diaphragm pump can be used for underwater work. The air outlet of the first air pump 52 and the air inlet of the second air pump 53 are both communicated with the inside of the fixed base 51. Both the first air pump 52 and the second air pump 53 are installed on the cylindrical surface of the water intake container 3. The inside of the fixed base 51 is screwed into the inside of the water intake container 3 and the fixed base 51 through two connecting pipes. And the air outlet of the first air pump 52 is connected to one of the connecting pipes, and the air inlet of the second air pump 53 is connected to the other connecting pipe. Thus, the fixed base 51, the first air pump 52 and the second air pump 53 are all installed on the water intake container 3. And the power supplies of the first air pump 52 and the second air pump 53 and the connecting wire 2 are all wound on the wire reel 1, which will not affect the operation of the first air pump 52 and the second air pump 53. An airbag 54 is arranged at the top end of the fixed base 51, and the airbag 54 is arranged vertically inside the water intake container 3. The first air pump 52 and the second air pump 53 are used in cooperation to control the inflation of the airbag 54. The inflated state and the contracted state of the airbag 54 are used to control the water volume in the water intake container 3. A fixing ring 59 is welded on the cylindrical surface of the fixed base 51. Two connecting rods 57 are welded inside the fixing ring 59. A number of movable rings 55 are arranged between the two connecting rods 57. The inside of the movable ring 55 is slidably connected to the connecting rod 57. And the airbag 54 is connected to the inside of each movable ring 55. When the airbag 54 expands or contracts, it can drive the movable ring 55 to move along the connecting rod 57. After the airbag 54 contracts, the internal capacity of the water intake container 3 can be increased. After the airbag 54 expands, the internal capacity of the water intake container 3 can be reduced.

[0036] Please refer to Figures 3-5As shown, connection holes 56 are provided on both sides of the movable ring 55. Two connecting rods 57 are respectively located inside the two connection holes 56. The connection holes 56 of the movable ring 55 move along the connecting rods 57. Thus, when the airbag 54 expands or contracts, the positions of the movable ring 55 and the connecting rods 57 can be changed. At the top ends of the two connecting rods 57, first telescopic springs 58 are provided. The first telescopic springs 58 are located on the upper surface of the uppermost movable ring 55. The first telescopic springs 58 can move the uppermost movable ring 55. Thus, when the airbag 54 contracts, the first telescopic springs 58 can move the movable ring 55.

[0037] Please refer to Figure 3 and Figure 5 As shown, fixed rings are welded to the top ends of the two connecting rods 57, and the diameter of the fixed rings is greater than the diameter of the first telescopic springs 58. The length of the first telescopic springs 58 is adapted to the length of the connecting rods 57. The first telescopic springs 58 are used to drive the movable ring 55 and the airbag 54 to move. When the first telescopic springs 58 move on the connecting rods 57, the fixed rings at the ends of the connecting rods 57 are used to prevent the first telescopic springs 58 from falling off.

[0038] Please refer to Figure 3 As shown, when the airbag 54 is in the inflated state, the air outlet of the first air pump 52 supplies air to the airbag 54, and the air inlet of the second air pump 53 stops working. The inflated airbag 54 is used to reduce the space in the water intake container 3. When the water intake container 3 is not placed in the coal mine, air can be extracted through the air inlet of the first air pump 52, and the air outlet of the first air pump 52 supplies air to the airbag 54 so that the airbag 54 expands. At this time, the space in the water intake container 3 is adjusted, and the air in the water intake container 3 is discharged when it is not placed in water. After the water intake container 3 is placed in the mine, it is convenient to discharge the air in the water intake container 3.

[0039] Please refer to Figure 6 As shown, when the airbag 54 is in the contracted state, the air outlet of the first air pump 52 stops working, and the air inlet of the second air pump 53 sucks the gas in the airbag 54. The contracted airbag 54 is used to increase the space in the water intake container 3. When the water intake container 3 is placed in the mine water source, since there is air in the water intake container 3, at this time, the volume of the liquid that needs to flow into the water intake container 3 can be used to change the reduction of the airbag 54. Specifically, the air inlet of the second air pump 53 discharges the air inside the airbag 54. The movable ring 55 can be moved downward along the connecting rod 57 while the airbag 54 contracts. The volume of the airbag 54 becomes smaller, which can increase the volume in the water intake container 3. At this time, the water source can be sucked into the water intake container 3 from the water inlet base 4, and the water source can easily enter the water intake container 3.

[0040] It should be noted that by discharging the gas inside the inflated airbag 54, the internal space of the water intake container 3 can be increased. According to the increased space of the water intake container 3, the liquid flowing into the water intake container 3 can be changed. And when the airbag 54 contracts, the water intake container 3 is in a negative pressure state, which is more conducive to the liquid entering the interior of the water intake container 3. The inflated airbag 54 is used to reduce the space in the water intake container 3. After taking out the water intake container 3 from the mine water, at this time, the airbag 54 expands, making the space in the water intake container 3 smaller, which is conducive to quickly discharging the liquid in the water intake container 3.

[0041] Please refer to Figure 2 、 Figure 7 and Figure 8 As shown, an inlet water control structure 6 is provided inside the wire reel 1 and below the fixed base 51. The inlet water control structure 6 includes a sliding sleeve 63. The sliding sleeve 63 is arranged in the middle of the bottom end of the fixed base 51, and the sliding sleeve 63 is slidably connected to the inside of the fixed base 51. A sealing ring is provided between the bottom end of the fixed base 51 and the outside of the sliding sleeve 63 to prevent liquid from entering the inside of the airbag 54 from the bottom end of the fixed base 51. When the airbag 54 is in a negative pressure state, the sliding sleeve 63 can be moved upward by a certain position. Inside the water intake container 3 and below the fixed base 51, an intermediate seat 61 is welded. The top end of the intermediate seat 61 is provided with a first lifting plate 64, and the shape of the first lifting plate 64 is adapted to the shape of the intermediate seat 61. The sliding sleeve 63 and the first lifting plate 64 can be lifted and lowered together. The first lifting plate 64 is used to open and close the liquid passage in the inlet water base 4. When the first lifting plate 64 rises, the liquid passage in the inlet water base 4 can be opened. When the first lifting plate 64 descends, the liquid passage in the inlet water base 4 can be closed. A fixed rod 65 is welded in the middle of the first lifting plate 64. A support plate 62 is welded in the middle of the inside of the intermediate seat 61. The middle of the support plate 62 is slidably connected to the fixed rod 65. A second telescopic spring 66 is sleeved outside the fixed rod 65. The second telescopic spring 66 is used to move the first lifting plate 64 upward. Since when the airbag 54 is in a contracted state, the sliding sleeve 63 and the first lifting plate 64 can be moved upward, and under the action of the second telescopic spring 66, the first lifting plate 64 and the sliding sleeve 63 will also be moved upward, so that the liquid can flow from the inlet water base 4 into the water intake container 3.

[0042] Please refer to Figure 7 and Figure 8As shown, the first lifting plate 64 and the sliding sleeve 63 move synchronously. The second telescopic spring 66 is located between the support plate 62 and the first lifting plate 64. A reserved groove 67 is formed inside the support plate 62. The middle of the reserved groove 67 is slidably connected to the fixed rod 65. The bottom end of the fixed rod 65 is slidably connected to the bottom end of the water inlet base 4. When the airbag 54 contracts, the second telescopic spring 66 can lift the first lifting plate 64 upward, thereby connecting the air in the water intake container 3, and water can enter the inside of the water intake container 3.

[0043] Please refer to Figure 7 and Figure 8 As shown, the airbag 54 in the contracted state is used to move the sliding sleeve 63 upward, and the middle seat 61 is separated from the first lifting plate 64. The acting force of the airbag 54 in the contracted state is less than the acting force of the second telescopic spring 66. Thus, the sliding sleeve 63 and the first lifting plate 64 move upward, and water flows from the water inlet base 4 into the water intake container 3. The airbag 54 in the inflated state is used to move the sliding sleeve 63 downward, and the middle seat 61 is closed with the first lifting plate 64. The inflation of the airbag 54 makes the acting force of the airbag 54 greater than the acting force of the second telescopic spring 66. Thus, the sliding sleeve 63 and the first lifting plate 64 move downward. Only by discharging the air inside the airbag 54 can the first lifting plate 64 be moved upward. At this time, the liquid in the mine flows into the inside of the water intake container 3. The opening and closing of the liquid flow channel are controlled by the inflation or contraction of the airbag 54. After taking the liquid, the first lifting plate 64 and the middle seat 61 can be closed by inflating the airbag 54 to prevent the liquid from flowing out from the middle seat 61. The first lifting plate 64 can only be opened by pushing the bottom end of the fixed rod 65.

[0044] Please refer to Figure 2 、 Figure 9 and Figure 10As shown, a coal cleaning structure 7 is provided inside the water inlet base 4 and at the bottom end of the fixed rod 65. The coal cleaning structure 7 includes water permeable holes 71 which are opened in a circle around the water inlet base 4. The water permeable holes 71 are used to allow the water outside the water intake container 3 and the water inlet base 4 to flow into the water intake container 3 and the inside of the water inlet base 4, so that the water intake container 3 can be used for sampling. A second lifting plate 72 is welded to the bottom end of the fixed rod 65. The shape of the second lifting plate 72 is adapted to the inner shape of the water inlet base 4. After the second lifting plate 72 is installed inside the water inlet base 4, the bottom end of the water inlet base 4 is welded. Fixing holes 74 are opened at the edge of the second lifting plate 72 and corresponding to each water permeable hole 71. A water passing column 73 and a third telescopic spring 75 are arranged inside each fixing hole 74. The third telescopic spring 75 is located inside the fixing hole 74. One end of the water passing column 73 is located inside the fixing hole 74. The water passing column 73 is used to remove the accumulated granular coal inside the water permeable holes 71. The second lifting plate 72 and the fixed rod 65 are lifted and lowered synchronously. When the second lifting plate 72 is lifted and lowered, the water passing column 73 can be driven to lift and lower. Thus, the end of the water passing column 73 is movably connected to the inside of the water permeable hole 71, and the end of the water passing column 73 can be used to clean the part of the granular coal blocks remaining inside the water permeable hole 71.

[0045] Please refer to Figure 9 and Figure 10 As shown, the edge of the second lifting plate 72 is slidably connected to the inside of the water inlet base 4. The shape of the water permeable hole 71 is frustum-shaped, and the tip shape of the water passing column 73 is frustum-shaped. The water passing column 73 slides inside the fixing hole 74. The shapes of the water permeable hole 71 and the water passing column 73 are beneficial to the relative sliding of the water permeable hole 71 and the water passing column 73. When the second lifting plate 72 is lifted and lowered, the water permeable hole 71 and the water passing column 73 come into contact repeatedly. The third telescopic spring 75 is used to ensure that the water passing column 73 is always in contact with each water permeable hole 71. When the first lifting plate 64 rises or falls, the water passing column 73 on the second lifting plate 72 can be driven to lift and lower. The water passing column 73 can clean the remaining granular coal blocks in the water permeable hole 71 to avoid the accumulation of granular coal blocks at the water permeable hole 71.

[0046] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific embodiments. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A sampling device for detecting underground water in a coal mine, comprising a wire take-up device (1) and a water collection container (3), wherein the top end of the water collection container (3) is connected to the wire take-up device (1) via a connecting wire (2), and the connecting wire (2) is wound around the outside of the wire take-up device (1), characterized in that: A water inlet base (4) is embedded at the bottom end of the water intake container (3), and a water volume control mechanism (5) is arranged inside the water intake container (3) and above the water inlet base (4). The water volume control mechanism (5) comprises a fixed base (51), which is arranged at the lower end of the interior of the water inlet base (4), and a first air pump (52) and a second air pump (53) are arranged on the cylindrical surface of the fixed base (51), the air outlet of the first air pump (52) and the air inlet of the second air pump (53) are both connected to the interior of the fixed base (51), and the first air pump (52) and the second air pump (53) are both installed in the water intake container (3). The cylindrical surface of the water container (3) is provided with an air bag (54) at the top of the fixed base (51), and the air bag (54) is arranged in a vertical direction inside the water collection container (3), and the expansion state and contraction state of the air bag (54) are used to control the amount of water in the water collection container (3), the cylindrical surface of the fixed base (51) is welded with a fixed ring (59), the interior of the fixed ring (59) is welded with two connecting rods (57), a plurality of movable rings (55) are provided between the two connecting rods (57), and the interior of the movable ring (55) is slidably connected to the connecting rod (57), and the air bag (54) is connected to the interior of each movable ring (55).

2. A sampling device for detecting underground water in coal mines according to claim 1, characterized in that: The movable ring (55) is provided with connecting holes (56) on both sides, and two connecting rods (57) are respectively located inside the two connecting holes (56). The top ends of the two connecting rods (57) are provided with first telescopic springs (58), and the first telescopic springs (58) are located on the upper surface of the uppermost movable ring (55).

3. A sampling device for detecting underground water in coal mines according to claim 2, characterized in that: The top ends of the two connecting rods (57) are both welded with fixing rings, and the diameter of the fixing rings is greater than the diameter of the first telescopic spring (58). The length of the first telescopic spring (58) is adapted to the length of the connecting rod (57). The first telescopic spring (58) is used to drive the movable ring (55) and the airbag (54) to move.

4. A sampling device for detecting underground water in coal mines according to claim 3, characterized in that: When the airbag (54) is in an expanded state, the air outlet of the first air pump (52) supplies air to the airbag (54), and the air inlet of the second air pump (53) stops working. The airbag (54) in an expanded state is used to reduce the space in the water collection container (3).

5. A sampling device for detecting underground water in coal mines according to claim 3, characterized in that: When the airbag (54) is in a contracted state, the air outlet of the first air pump (52) stops working, and the air inlet of the second air pump (53) absorbs the gas in the airbag (54). The airbag (54) in a contracted state is used to increase the space in the water collection container (3).

6. A sampling device for detecting underground water in coal mines according to claim 4 or 5, characterized in that: A water inlet control structure (6) is arranged inside the wire take-up device (1) and below the fixed base (51). The water inlet control structure (6) comprises a sliding sleeve (63). The sliding sleeve (63) is arranged in the middle of the bottom end of the fixed base (51), and the sliding sleeve (63) is slidably connected to the inside of the fixed base (51). An intermediate seat (61) is welded inside the water collection container (3) and below the fixed base (51). A first lifting plate (64) is arranged at the top of the intermediate seat (61), and the first lifting plate (64) is arranged at the top of the intermediate seat (61). The shape of the lifting plate (64) is adapted to the shape of the middle seat (61). The first lifting plate (64) is used to open and close the liquid channel in the water inlet base (4). A fixing rod (65) is welded in the middle of the first lifting plate (64). A support plate (62) is welded in the middle of the middle seat (61). The middle of the support plate (62) is slidably connected to the fixing rod (65). A second telescopic spring (66) is sleeved on the outside of the fixing rod (65). The second telescopic spring (66) is used to move the first lifting plate (64) upward.

7. A sampling device for detecting underground water in coal mines according to claim 6, characterized in that: The first lifting plate (64) and the sliding sleeve (63) move synchronously, the second telescopic spring (66) is located between the support plate (62) and the first lifting plate (64), a reserved groove (67) is provided inside the support plate (62), the reserved groove (67) is slidably connected to the middle of the fixing rod (65), and the bottom end of the fixing rod (65) is slidably connected to the bottom end of the water inlet base (4).

8. A sampling device for detecting underground water in coal mines according to claim 7, characterized in that: The airbag (54) in the contracted state is used to move the sliding sleeve (63) upwards, and the middle seat (61) is separated from the first lifting plate (64); the airbag (54) in the expanded state is used to move the sliding sleeve (63) downwards, and the middle seat (61) is closed to the first lifting plate (64).

9. A sampling device for detecting underground water in coal mines according to claim 8, characterized in that: A coal cleaning structure (7) is arranged inside the water inlet base (4) and at the bottom end of the fixing rod (65). The coal cleaning structure (7) comprises water permeable holes (71). The water permeable holes (71) are arranged around the water inlet base (4). A second lifting plate (72) is welded to the bottom end of the fixing rod (65). The shape of the second lifting plate (72) matches the shape of the inside of the water inlet base (4). A fixing hole (74) is arranged at the edge of the second lifting plate (72) and at a position corresponding to each water permeable hole (71). A water column (73) and a third telescopic spring (75) are arranged inside each fixing hole (74). One end of the water column (73) is located inside the fixing hole (74). The water column (73) is used to remove the granular coal accumulated inside the water permeable hole (71).

10. A sampling device for detecting underground water in coal mines according to claim 9, characterized in that: The edge of the second lifting plate (72) is slidably connected to the inside of the water inlet base (4); the water permeable hole (71) is truncated cone-shaped, and the tip of the water-passing column (73) is truncated cone-shaped; the water-passing column (73) slides inside the fixing hole (74); and the third telescopic spring (75) is used to ensure that the water-passing column (73) is always in contact with each water permeable hole (71).

Images