A domestic water sampling and testing device

Abstract

The invention discloses a domestic water sampling and detection device, which relates to the technical field of water detection and sampling, and comprises an air cushion, wherein a water suction pipe is fixedly installed in the middle of the air cushion, a motor is fixedly connected to the top of the water suction pipe, a filter ball is fixedly connected to the bottom of the water suction pipe, a screw is fixedly connected to the bottom of the motor output shaft, a partition is fixedly installed inside the water suction pipe, pistons are slidably connected to both sides of the partition, an isolation cylinder is fixedly installed in the middle of the partition, and a sealing ring is sleeved on the outer ring of each piston. In this domestic water sampling and detection device, the pistons move independently through the partition for isolation, so that the water suction pipe can at least absorb water from two or more points, and then multiple sampling tubes can be manually removed for inspection, so that water in each area does not mix inside the water suction pipe when sampling, thereby preventing cross contamination between waters and ensuring the accuracy of inspection data when conducting water inspections.

Description

Technical Field

[0001] The invention relates to the technical field of water detection and sampling, in particular to a domestic water sampling and detection device. Background Art

[0002] Domestic water refers to the water needed for human daily life. It includes urban domestic water and rural domestic water. Urban domestic water consists of residential water and public water (including water used by the service industry, catering industry, freight, postal and telecommunications industry, and construction industry). Rural domestic water includes livestock water in addition to residential water.

[0003] Domestic water is stored in multiple places, including surface water, groundwater, atmospheric water and biological water. Surface water mainly refers to water stored in oceans, lakes, rivers, glaciers, wetlands and other water bodies. These water bodies are one of the important sources of domestic water. The sources and storage methods of domestic water are diverse. The use of these water resources requires comprehensive consideration of their sustainability and environmental protection. For some rural areas, some rivers and spring water are directly quoted and used, so regular sampling and inspection are required to ensure safety.

[0004] However, in actual sampling, since the area of ​​drinking water sources is generally large, it is generally difficult to sample the water quality in the middle of the drinking water source, and it is necessary to use ship equipment for assistance, while floating samplers are difficult to achieve continuous multi-point sampling. Single-point sampling often leads to isolated cases that are very different from the actual situation, resulting in large errors in water quality test results. At the same time, existing water quality environment testing sampling devices use direct sampling methods, which often easily lead to a large amount of impurities and aquatic organisms in the native water body being taken at the same time, causing an impact on subsequent testing work. In addition, general sampling equipment mostly uses negative pressure siphon force for water sampling, which causes impurities and floating objects in the water to be concentrated and sucked together with the suction, so that the impurity content in the obtained water sample is often higher than that in normal water samples, resulting in errors in the test results, thereby affecting people's judgment. In order to understand To solve this problem, China Patent Authorization No. CN116793760B proposes a solution. In this technology, a sampler is floated on the water surface, and then the motor on the sampler is started. The motor shaft is connected to the screw, and then the screw rotates the piston inside the sampler to suck water into each sampling tube. At the same time, the sampler can be pulled along the water surface by hand by pulling the rope, so that the device can store water samples from multiple points. However, although this solves the problem of multi-point sampling, since the internal flow channel of the device and the inside of each sampling tube are connected, there are multiple water bodies that interfere with each other when the sampler moves, and the sampling tubes cannot be ruled out from being cross-contaminated, affecting the data results. Moreover, when only one of the points can be tested, the sampler is taken out, the internal flow channel of the device is disinfected and cleaned, and the next batch of sampling tubes for testing are replaced. However, this will reduce the efficiency of detection and is very cumbersome. Summary of the invention

[0005] The purpose of the present invention is to provide a domestic water sampling and testing device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a domestic water sampling and testing device, comprising an air cushion, a water suction pipe is fixedly installed in the middle of the air cushion, a motor is fixedly connected to the top of the water suction pipe, a filter ball is fixedly connected to the bottom of the water suction pipe, a screw is fixedly connected to the bottom of the motor output shaft, a partition is fixedly installed inside the water suction pipe, pistons are slidably connected to both sides of the partition, an isolation cylinder is fixedly installed in the middle of the partition, a sealing ring is sleeved on the outer ring of each piston, a lifting plate is threadedly connected to the screw, the lifting plate and the isolation cylinder are slidably connected, a pair of connecting rods are fixedly connected to the top of the lifting plate, each The top of the connecting rod is fixedly connected to the connecting chamber, one end of the connecting chamber is fixedly connected to a support tube, the support tube is slidably connected to a load-bearing rod, a deformation block is fixedly installed inside the support tube, the deformation block and the load-bearing rod are slidably connected, and the load-bearing rod is fixedly provided with a compression block near the top of the deformation block, each of the support tubes is fixedly connected to a suction cup at the bottom, the support tube is fixedly connected to an air guide block at the bottom, the support tube is provided with an air outlet near the outer circle of the air guide block, and a driving ball is slidably connected to the inside of the connecting chamber; a plurality of connecting tubes are connected to the outside of the water suction pipe, and one end of each of the connecting tubes can be detachably connected to a sampling tube.

[0007] Preferably, a slope is provided at the connection between the connecting chamber and the supporting tube, one end of the slope is higher than the end of the connecting chamber, and the other end is lower than the inside of the supporting tube, and the deformation block is made of a cotton-like material with a certain elasticity.

[0008] Preferably, a second fixing plate is fixedly installed on the top of the isolation cylinder, the connecting rod passes through the second fixing plate and extends outside the isolation cylinder, a bearing is fixedly installed between the bottom of the screw rod and the isolation cylinder, and a third spring is fixedly connected to the bottom of the isolation cylinder.

[0009] Preferably, a lifting ring is installed on the top of the motor, and the vertical direction of the lifting ring is the same as that of the partition.

[0010] Preferably, a lifting rack is fixedly installed on the outside of each of the support tubes, a plurality of first gears are rotatably installed on the outside of the water suction pipe, second gears are fixedly installed on both sides of each of the first gears, a suspension arm is fixedly installed at the edge of the air cushion, a rack assembly is slidably connected to each of the suspension arms, the first gear and the rack assembly are meshed for transmission, one end of each of the rack assemblies is fixedly connected to a traction rope, a movable plate is slidably connected to the bottom of the air cushion, one end of the traction rope and the movable plate are fixedly connected together, one side of the bottom of each movable plate extends toward the outside of the filter ball, a cleaning arm is fixedly installed on one side of the movable plate, and the cleaning arm is in contact with the surface of the filter ball.

[0011] Preferably, the cleaning arm is made of elastic rubber material, and a discharge fan is fixedly mounted on the other side of each movable plate.

[0012] Preferably, a mounting block is fixedly installed on the outside of the water suction pipe near the bottom of each rack assembly, a first spring is arranged between each mounting block and the rack assembly, a second spring is fixedly connected to one side of the movable plate, a first fixed plate is fixedly installed at one end of each second spring, and each first fixed plate and the air cushion are detachably connected.

[0013] Preferably, the number of the sampling tubes is at least four, and the plurality of sampling tubes are divided into a plurality of groups and each group is placed on the air cushion with a pair of suspension arms as the symmetry center.

[0014] Preferably, the bottom of the air cushion has an upward recessed area so that the middle portion thereof becomes a hydrophobic area that does not contact the water surface, and the second spring is located in the hydrophobic area.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] When the present invention needs to sample multiple points during one sampling process, during this process, the human hand gives assistance to the air cushion, and the air cushion produces an inclination in the direction of the biased force source, so that the driving ball loses balance and moves in the direction of the pulling force, and contacts the top of the load-bearing rod in the direction of the biased force source again, while the other driving ball is at one end of the connecting chamber during this process. After the driving ball contacts the load-bearing rod, the gravity of the driving ball causes the load-bearing rod to drop, and the deformation block is deformed by the compression block, so that the air guide block discharges the gas on the top of the suction cup, so that the suction cup and the piston are firmly adsorbed together, so that the piston can It can be driven up by the support tube alone, while the piston on the other side of the partition is located at the bottom of the water suction pipe and does not rise. When the bottom of the piston exceeds the top of the end of the connecting pipe, the water is stored in the sampling tube, and the piston moves independently through the partition for isolation. In this way, the water suction pipe can at least absorb water from two or more points, and then multiple sampling tubes can be removed manually for inspection, so that the water in each area will not mix inside the water suction pipe when sampling, thus preventing cross contamination between waters and ensuring the accuracy of the inspection data when conducting water inspections. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the isolation cylinder and piston structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the screw rod and the lifting plate of the present invention;

[0022] Figure 6 This is a schematic diagram of the internal structure of the support tube of the present invention;

[0023] Figure 7 For the present invention Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0024] In the figure: 1-air cushion; 2-water suction pipe; 3-motor; 4-lifting ring; 5-lifting arm; 501-traction rope; 6-sampling tube; 7-connecting tube; 8-filter ball; 9-discharge fan; 10-cleaning arm; 11-mounting block; 12-first spring; 13-rack assembly; 14-first gear; 15-second gear; 16-first fixed plate; 17-second spring; 18-moving plate; 20-sealing ring; 21-lifting rack; 22-piston; 23-partition; 24-isolating cylinder; 25-bearing; 26-third spring; 27-lifting plate; 28-connecting rod; 29-screw rod; 30-second fixed plate; 31-connecting chamber; 32-driving ball; 33-load-bearing rod; 34-deformation block; 35-compression block; 36-suction cup; 37-air guide block; 38-support cylinder; 39-air outlet. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-7The present invention provides a technical solution: a domestic water sampling and testing device, comprising an air cushion 1, a water suction pipe 2 is fixedly installed in the middle of the air cushion 1, a motor 3 is fixedly connected to the top of the water suction pipe 2, a filter ball 8 is fixedly connected to the bottom of the water suction pipe 2, a screw 29 is fixedly connected to the bottom of the output shaft of the motor 3, a partition 23 is fixedly installed inside the water suction pipe 2, pistons 22 are slidably connected to both sides of the partition 23, an isolation cylinder 24 is fixedly installed in the middle of the partition 23, each of the outer rings of the pistons 22 is sleeved with a sealing ring 20, a lifting plate 27 is threadedly connected to the screw 29, the lifting plate 27 and the isolation cylinder 24 are slidably connected, and the lifting plate 27 is slidably connected to the isolation cylinder 24. A pair of connecting rods 28 are fixedly connected to the top of the plate 27, and the top of each connecting rod 28 is fixedly connected to a connecting chamber 31, and one end of the connecting chamber 31 is fixedly connected to a support tube 38, and a load-bearing rod 33 is slidably connected inside the support tube 38. A deformation block 34 is fixedly installed inside the support tube 38, and the deformation block 34 and the load-bearing rod 33 are slidably connected. A compression block 35 is fixedly provided on the load-bearing rod 33 near the top of the deformation block 34, and a suction cup 36 is fixedly connected to the bottom of each support tube 38. An air guide block 37 is fixedly connected to the bottom of the support tube 38, and an air outlet 39 is opened on the support tube 38 near the outer circle of the air guide block 37. A driving ball 32 is slidably connected inside the connecting chamber 31; a plurality of connecting tubes 7 are connected to the outside of the water suction pipe 2, and one end of each connecting tube 7 is detachably connected to a sampling tube 6; a hanging ring 4 is installed on the top of the motor 3, and the vertical direction of the hanging ring 4 is the same as that of the partition 23; the air cushion 1 has a certain buoyancy. When it is necessary to take water samples from the sampling tube 6, the inside of the water suction pipe 2 can be disinfected in advance to prevent cross contamination when taking water from the water suction pipe 2 at multiple points of sampling. Then, the device can be thrown into the detection water area through a manual picking device, and then the motor 3 can be remotely controlled to rotate. When the motor 3 rotates, it drives the lifting plate 27 to move upward. The rod 29 rises, and during the rising process of the lifting plate 27, the two connecting rods 28 are driven to rise synchronously, so that the connecting rod 28 drives the connecting chamber 31 to rise. During the rising process of the connecting chamber 31, the suction cup 36 at the bottom of the support tube 38 adsorbs the top of the piston 22, pulling the piston 22 to rise, and finally a negative pressure is generated inside the water suction pipe 2, and the water that has been filtered by the filter ball 8 is sucked into the water suction pipe 2. As the motor 3 continues to rotate, the lifting plate 27 is driven to continue to rise, so that the connecting chamber 31 passes over the top of the water suction pipe 2, so that the height of the piston 22 exceeds the connecting pipe 7, and the water is introduced into the sampling pipe 6 through the connecting pipe 7 for storage.

[0027] When it is necessary to sample multiple points during one sampling process, the piston 22 inside the device is first reset to the bottom of the suction pipe 2, and then the rope and the ring 4 can be manually connected on the shore for connection, and then the device is manually held by the rope to swing the device to separate the driving ball 32 and the top of the load-bearing rod 33, and the load-bearing rod 33 is swung to different positions. The load-bearing rod 33 loses pressure, and the deformation block 34 is reset, so that the air guide block 37 blocks the air outlet 39, and then the rope is manually pulled to move the device to different waters. During this process, the air cushion 1 is manually assisted, and the air cushion 1 is tilted in the direction of the biased force source, causing the driving ball 32 to lose balance and move in the direction of the pulling force, and then contact the top of the load-bearing rod 33 in the direction of the biased force source, while the other driving ball 32 is at one end of the connecting chamber 31 during this process. When the driving ball 32 contacts the load-bearing rod 33 After that, the gravity of the driving ball 32 causes the load-bearing rod 33 to descend, and the deformation block 34 is deformed by the compression block 35, allowing the air guide block 37 to discharge the gas on the top of the suction cup 36, so that the suction cup 36 and the piston 22 are firmly adsorbed together, so that the piston 22 can be driven up by the support tube 38 alone, and the piston 22 located on the other side of the partition 23 is located at the bottom of the water suction pipe 2 and does not rise. When the bottom of the piston 22 exceeds the end of the connecting pipe 7, the water is stored in the sampling pipe 6, and the piston 22 moves independently through the partition 23 for isolation. In this way, the water suction pipe 2 can at least absorb water from two or more points, and then multiple sampling tubes 6 can be manually removed for inspection, so that the water in each area will not be mixed inside the water suction pipe 2 when sampling, thereby preventing cross contamination between waters and ensuring the accuracy of the inspection data when conducting water inspections.

[0028] Furthermore, the number of the sampling tubes 6 is at least four, and the multiple sampling tubes 6 are divided into multiple groups and each group is placed on the air cushion 1 with a pair of booms 5 as the symmetric center, which solves the weight counterweight problem when the device is moved and prevents deviation.

[0029] Specifically, an inclined surface is provided at the connection between the connecting chamber 31 and the supporting tube 38, one end of the inclined surface is at the end of the connecting chamber 31 as the high point, and the other end is at the inside of the supporting tube 38 as the low point. The deformable block 34 is made of a cotton-like material with a certain elasticity. The inclined surface of the connecting chamber 31 can effectively prevent the device from separating the driving ball 32 and the connecting chamber 31 when subjected to non-human external forces, such as when the water surface is unstable or wind blows to generate waves.

[0030] Furthermore, a second fixed plate 30 is fixedly installed on the top of the isolation cylinder 24, and the connecting rod 28 passes through the second fixed plate 30 and extends outside the isolation cylinder 24. A bearing 25 is fixedly installed between the bottom of the screw rod 29 and the isolation cylinder 24. A third spring 26 is fixedly connected to the bottom of the isolation cylinder 24. The bearing 25 can maintain the rotation of the bottom of the screw rod 29. When the piston 22 needs to be reset and the lifting plate 27 drops to a low position, the third spring 26 prevents the lifting plate 27 and the threaded surface of the screw rod 29 from detaching.

[0031] Furthermore, a lifting rack 21 is fixedly installed on the outside of each support tube 38, a plurality of first gears 14 are rotatably installed on the outside of the water suction pipe 2, and a second gear 15 is fixedly installed on both sides of each of the first gears 14. A suspension arm 5 is fixedly installed at the edge of the air cushion 1, and a rack assembly 13 is slidably connected to each of the suspension arms 5. The first gear 14 and the rack assembly 13 are meshed for transmission, and a traction rope 501 is fixedly connected to one end of each of the rack assemblies 13. A movable plate 18 is slidably connected to the bottom of the air cushion 1, and one end of the traction rope 501 is fixedly connected to the movable plate 18. One side of the bottom of each movable plate 18 extends toward the outside of the filter ball 8, and a cleaning arm 1 is fixedly installed on one side of the movable plate 18. 0, the cleaning arm 10 is in contact with the surface of the filter ball 8. When the piston 22 rises, the water suction pipe 2 is in a state of absorbing water, so that floating impurities are generated on the surface of the filter ball 8, reducing the finished water sample. Therefore, in the process of the piston 22 rising, the support cylinder 38 rises and drives the lifting rack 21 to rise. The lifting rack 21 rises and drives the first gear 14 to rotate, so that the second gear 15 drives the rack assembly 13 to move upward, so that the traction rope 501 pulls the moving plate 18, so that a pair of moving plates 18 are away from the surface of the filter ball 8. In the process of the moving plate 18 moving, the cleaning arm 10 drives the impurities floating on the surface of the filter ball 8 to be wiped off, thereby improving the cleanliness of the surface of the filter ball 8 and effectively improving the cleanliness of the water sample.

[0032] Furthermore, the cleaning arm 10 is made of elastic rubber material. The cleaning arm 10 can wipe out a larger area of ​​the filter ball 8 according to its elasticity. A discharge fan 9 is fixedly installed on the other side of each movable plate 18. When a pair of movable plates 18 are in the process of relative movement, the discharge fan 9 generates resistance under the water area, so that the discharge fan 9 can be electrically controlled to rotate. After the vortex is generated, the impurities cleaned by the cleaning arm 10 are further away from the surface of the filter ball 8, thereby further improving the water purity around the filter ball 8.

[0033] Furthermore, a mounting block 11 is fixedly installed on the outside of the suction pipe 2 near the bottom of each rack assembly 13, a first spring 12 is arranged between each mounting block 11 and the rack assembly 13, a second spring 17 is fixedly connected to one side of the movable plate 18, a first fixing plate 16 is fixedly installed at one end of each second spring 17, and each first fixing plate 16 and the air cushion 1 are detachably connected; the bottom of the air cushion 1 has an upward recessed area so that its middle part becomes a hydrophobic area that does not contact the water surface, and the second spring 17 is located in the hydrophobic area, the first spring 12 can effectively stabilize the meshing between the rack assembly 13 and the first gear 14, the second spring 17 facilitates the resetting of the cleaning arm 10, and the hydrophobic area can prevent weeds in the water body from getting stuck on the second spring 17 when the second spring 17 is reset, thereby reducing the mobility of the cleaning arm 10.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A domestic water sampling and testing device, comprising an air cushion (1), characterized in that: A water suction pipe (2) is fixedly installed in the middle of the air cushion (1), a motor (3) is fixedly connected to the top of the water suction pipe (2), a filter ball (8) is fixedly connected to the bottom of the water suction pipe (2), a screw (29) is fixedly connected to the bottom of the output shaft of the motor (3), a partition (23) is fixedly installed inside the water suction pipe (2), pistons (22) are slidably connected to both sides of the partition (23), an isolation cylinder (24) is fixedly installed in the middle of the partition (23), each of the outer rings of the pistons (22) is sleeved with a sealing ring (20), and the screw (29) is threadedly connected to the outer ring. A lifting plate (27) is connected, the lifting plate (27) and the isolation cylinder (24) are slidably connected, a pair of connecting rods (28) are fixedly connected to the top of the lifting plate (27), the top of each connecting rod (28) is fixedly connected to a connecting chamber (31), one end of the connecting chamber (31) is fixedly connected to a support cylinder (38), the support cylinder (38) is slidably connected to a load-bearing rod (33), a deformation block (34) is fixedly installed inside the support cylinder (38), the deformation block (34) and the load-bearing rod (33) are slidably connected, and the load-bearing rod (33) is close to the deformation block (34). A compression block (35) is fixedly arranged above the variable block (34); a suction cup (36) is fixedly connected to the bottom of each support tube (38); an air guide block (37) is fixedly connected to the bottom of the support tube (38); an air outlet hole (39) is opened near the outer ring of the air guide block (37) in the support tube (38); a driving ball (32) is slidably connected to the inside of the connecting chamber (31); a plurality of connecting tubes (7) are connected to the outside of the water suction pipe (2); one end of each connecting tube (7) is detachably connected to a sampling tube (6); the connecting chamber (31) and the support tube ( A slope is provided at the connection between the two parts, one end of the slope is at the end of the connection chamber (31) as the high point, and the other end is at the inside of the support tube (38) as the low point. The deformation block (34) is made of a cotton-like material with a certain elasticity. A second fixing plate (30) is fixedly installed on the top of the isolation tube (24). The connecting rod (28) passes through the second fixing plate (30) and extends outside the isolation tube (24). A bearing (25) is fixedly installed between the bottom of the screw rod (29) and the isolation tube (24). A third spring (26) is fixedly connected to the bottom of the isolation tube (24).

2. A domestic water sampling and testing device according to claim 1, characterized in that: A lifting ring (4) is installed on the top of the motor (3), and the vertical direction of the lifting ring (4) is the same as that of the partition (23).

3. A domestic water sampling and testing device according to claim 1, characterized in that: A lifting rack (21) is fixedly mounted on the outside of each support tube (38); a plurality of first gears (14) are rotatably mounted on the outside of the water suction pipe (2); a second gear (15) is fixedly mounted on both sides of each first gear (14); a suspension arm (5) is fixedly mounted on the edge of the air cushion (1); a rack assembly (13) is slidably connected to each suspension arm (5); the first gear (14) and the rack assembly (13) are meshed for transmission; one end of each rack assembly (13) is fixedly connected to a traction rope (501); a movable plate (18) is slidably connected to the bottom of the air cushion (1); one end of the traction rope (501) is fixedly connected to the movable plate (18); one side of the bottom of each movable plate (18) extends toward the outside of the filter ball (8); a cleaning arm (10) is fixedly mounted on one side of the movable plate (18); the cleaning arm (10) and the surface of the filter ball (8) are in abutting contact.

4. A domestic water sampling and testing device according to claim 3, characterized in that: The cleaning arm (10) is made of elastic rubber material, and a discharge fan (9) is fixedly mounted on the other side of each movable plate (18).

5. A domestic water sampling and testing device according to claim 3, characterized in that: A mounting block (11) is fixedly mounted on the outside of the water suction pipe (2) near the bottom of each rack assembly (13); a first spring (12) is arranged between each mounting block (11) and the rack assembly (13); a second spring (17) is fixedly connected to one side of the movable plate (18); a first fixed plate (16) is fixedly mounted on one end of each second spring (17); and each first fixed plate (16) and the air cushion (1) are detachably connected.

6. A domestic water sampling and testing device according to claim 3, characterized in that: The number of the sampling tubes (6) is at least four, and the plurality of sampling tubes (6) are divided into a plurality of groups, and each group is placed on the air cushion (1) with a pair of suspension arms (5) as the symmetrical center.

7. A domestic water sampling and testing device according to claim 5, characterized in that: The bottom of the air cushion (1) has an upwardly concave area so that its middle portion becomes a hydrophobic area that does not contact the water surface, and the second spring (17) is located in the hydrophobic area.

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