A water quality monitoring device and system for sea areas with Chinese white dolphin populations

Abstract

The present invention proposes a water quality monitoring device and system for sea areas with Chinese white dolphin populations, which relates to the field of water quality monitoring technology and includes a sampling tank and a counterweight. The sampling tank is provided with a sample cavity for holding samples, and a sampling port connected to the sample cavity is provided on one side of the sampling tank. A door panel capable of sealing the sampling port is installed in the sample cavity. The present invention proposes a water quality monitoring device and system for sea areas with Chinese white dolphin populations. By providing a sampling tank, a counterweight, a door panel, a pressure-driven structure, a ring, and a connecting rope, multiple independent sampling tanks can be connected together in sequence through connecting ropes according to actual needs, and the counterweight can be used to sink the sampling tanks into the sea water to complete sampling. The sampling of the sea water can be completed by simply sinking the corresponding sampling tank into the sea water of the corresponding depth. The operation is simple and convenient, and the small size makes it easy to store and carry. The sampling operation can be quickly carried out in deeper sea water and at various locations in the sea water.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality monitoring, and in particular to a water quality monitoring device and system for sea areas with Chinese white dolphin populations. Background Art

[0002] The Chinese white dolphin is a marine mammal belonging to the Delphinidae family and the genus Delphinus. It has a stout body, a medium-length beak, and a thickened ridge at the base of its dorsal fin, topped by a large, nearly triangular dorsal fin. Its flippers and tail are broad and have rounded tips. Specimens reach a maximum length of approximately 2.6 meters. The anterior end of its lower jaw slightly extends beyond its upper jaw, and there is no deep indentation separating its beak from its melanocele. A thickened ridge forms at the base of its dorsal fin, and its caudal peduncle has well-developed dorsal and ventral ridges. Juveniles are dark gray, becoming lighter with age. Subadults are a mixture of gray and pink, while adults are pure white, often showing pink due to blood flow. Some adults have dark spots on their bodies, and a few individuals have a ring of dark spots on their necks behind their blowholes. They prefer to inhabit subtropical estuaries where freshwater meets saltwater. They live in shallow, rocky areas and often gather near beaches for rest or play.

[0003] To protect the Chinese white dolphin, it is necessary to analyze the composition of marine water and evaluate treatment options, as well as research and analyze marine water treatment technologies and methods. Promoting environmental protection and the survival of the Chinese white dolphin requires sampling, testing, and treatment of marine water. When analyzing marine water composition and evaluating treatment methods, most methods involve manually using sampling tools to perform multi-point sampling in the marine water. However, many current sampling tools only sample at a single point, which is slow. A small number of sampling tools currently offer simultaneous multi-point sampling, but these tools first submerge the tool in the marine water to a certain depth before opening the sampling chamber's inlet via an electric or manual mechanical drive. Electric tools are heavy, making them difficult to operate and posing a risk of electric shock, especially in highly ionized water. Manual mechanical drives, however, can cause energy loss due to the long transmission distance, limiting reliability and efficiency, and are prone to failure, resulting in relatively high maintenance costs. Summary of the Invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a water quality monitoring device and system for sea areas with Chinese white dolphin populations.

[0005] The present invention proposes a water quality monitoring device for sea areas with Chinese white dolphin populations, comprising a sampling tank and a counterweight. The sampling tank is provided with a sample cavity for holding a sample, and a sampling port communicating with the sample cavity is provided on one side of the sampling tank. A door panel capable of sealing the sampling port is installed in the sample cavity. The sampling tank is provided with a pressure-driven structure, which is used to drive the door panel to seal the sampling port. When the sampling tank is submerged in water, water pressure can drive the door panel to open the sampling port.

[0006] A plurality of circular rings are fixedly mounted on the outer circumference of the sampling tank, and a connecting rope is detachably connected between the circular rings on two adjacent sampling tanks, and the counterweight block is detachably hoisted on the lowest sampling tank.

[0007] Preferably, the pressure drive structure includes a No. 1 piston block, a No. 2 piston block, a connecting rod, an elastic component and a fixed rotation component; a movable groove adapted to the No. 1 piston block is provided at the bottom of the sampling tank, and the No. 1 piston block is slidably installed in the movable groove; a driving groove adapted to the No. 2 piston block is provided on the bottom inner wall of the sample chamber, and the No. 2 piston block is slidably installed in the driving groove; and both ends of the connecting rod are fixedly connected to the No. 1 piston block and the No. 2 piston block respectively;

[0008] The elastic component is used to drive the No. 1 piston block to slide and reset in the movable groove;

[0009] The fixed rotation component is used to fix the position of the door panel when it blocks the injection port.

[0010] Preferably, a communication channel is provided between the movable groove and the driving groove, the connecting rod is located in the communication channel, and the diameter of the connecting rod is smaller than the inner diameter of the communication channel.

[0011] Preferably, the fixed rotation assembly includes a sliding rod and a stop block, the door panel is fixedly connected to a rotating shaft, the door panel is rotatably installed in the sample chamber through the rotating shaft, one end of the rotating shaft passes through the bottom inner wall of the sample chamber and extends into the movable groove and is fixedly connected to the sliding rod, the sliding rod and the rotating shaft are arranged vertically, the bottom end of the stop block is fixedly connected to the No. 1 piston block, the sliding rod rests on one side of the stop block, and the sliding rod and the side of the stop block are slidably matched, and the side of the stop block close to the sliding rod is provided with a bevel groove.

[0012] Preferably, the elastic component includes a straight spring; the straight spring is sleeved on the connecting rod, and the two ends of the straight spring respectively abut against the inner wall of the end of the No. 1 piston block and the movable groove;

[0013] A pressure regulating structure is installed on the sampling tank, and the pressure regulating structure is used to adjust the compression degree of the straight spring.

[0014] Preferably, the pressure regulating structure includes a conical ring plate and an adjusting assembly; the end of the movable groove is provided with a moving groove adapted to the conical ring plate, and the two ends of the straight spring respectively abut against the No. 1 piston block and the conical ring plate, and the adjusting assembly can adjust the distance between the conical ring plate and the No. 1 piston block.

[0015] Preferably, the adjusting assembly includes a movable part, an end face gear plate, a driving gear and an adjusting rod. The number of the movable parts is multiple, and the multiple movable parts are arranged in a ring array. The inner wall of the movement groove is provided with a telescopic hole that slides with the movable part, and the movable part slides with the inclined surface of the conical ring plate away from the straight spring. The end face gear plate is rotatably installed in the sampling tank, and a right-angle thread is provided on the side of the end face gear plate away from the tooth teeth. A thread groove adapted to the right-angle thread is provided on the movable part. When the end face gear plate rotates, the right-angle thread can slide in the thread groove on the movable part, and the driving gear is rotatably installed in the sampling tank, and the driving gear is meshed with the end face gear plate. One end of the adjusting rod is fixedly connected to the driving gear, and the other end of the adjusting rod passes through the sampling tank and extends to the outside of the sampling tank.

[0016] Preferably, the elastic component includes a constant torque spring and a force rod; an installation groove is opened in the sampling tank, the inner ring end of the constant torque spring is fixedly installed in the installation groove, the outer ring end of the constant torque spring is fixedly connected to the force rod, and one end of the force rod rests on piston block No. 1.

[0017] Preferably, a cavity is defined inside the end of the sampling tank away from the No. 1 piston block.

[0018] Preferably, one side of the sampling tank is engraved with angle markings, and the angle markings are located on the outer periphery of the adjustment rod.

[0019] The water quality monitoring device and system for sea areas with Chinese white dolphin populations proposed by the present invention have the following beneficial effects: through the provision of sampling tanks, counterweights, door panels, pressure-driven structures, rings and connecting ropes, multiple independent sampling tanks can be connected together in sequence through connecting ropes according to actual needs, and the counterweights can be used to sink them into the sea water to complete sampling. During the sampling process, no manual operation is required by the staff, and the sampling of the sea water can be completed by simply sinking the corresponding sampling tank into the sea water of the corresponding depth. The operation is simple and convenient, the size is small, and it is easy to store and carry, and sampling operations can be quickly performed on deeper sea water and various locations in the sea water. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a water quality monitoring device and system for sea areas with Chinese white dolphin populations proposed by the present invention;

[0021] Figure 2 This is a side sectional view of the sampling tank in Example 1 of the water quality monitoring device and system for the Chinese white dolphin population in the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of a water quality monitoring device for sea areas with Chinese white dolphin populations and a No. 1 piston block, a No. 2 piston block, a connecting rod, a sliding rod and a shift block in the system proposed by the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the door panel, slide bar and rotating shaft of a water quality monitoring device for sea areas with Chinese white dolphin populations and the system proposed by the present invention;

[0024] Figure 5 The present invention proposes a water quality monitoring device and system for sea areas with Chinese white dolphin populations Figure 2 Enlarged view of point A in the middle;

[0025] Figure 6 This is a bottom view of the coordination of the movable parts and end gear disc in the water quality monitoring device for the Chinese white dolphin population and the system proposed by the present invention;

[0026] Figure 7 A top view of a water quality monitoring device for sea areas with Chinese white dolphin populations and an end face gear disc in the system proposed by the present invention;

[0027] Figure 8 This is a side sectional view of the sampling tank in Example 2 of the water quality monitoring device and system for sea areas with Chinese white dolphin populations proposed by the present invention.

[0028] In the figure: 1. Sampling tank; 2. Sample cavity; 3. Sampling port; 4. Door panel; 5. Ring; 6. Connecting rope; 7. Counterweight; 8. Piston block No. 1; 9. Piston block No. 2; 10. Connecting rod; 11. Sliding rod; 12. Shift block; 13. Rotating shaft; 14. Straight spring; 15. Conical ring plate; 16. Movable part; 17. End gear plate; 18. Driving gear; 19. Adjusting rod; 20. Right-angle thread; 21. Constant torque spring; 22. Force rod; 23. Cavity. DETAILED DESCRIPTION

[0029] Example 1: Reference Figure 1-Figure 7The present invention proposes a water quality monitoring device and system for sea areas with Chinese white dolphin populations, including a sampling tank 1 and a counterweight 7. A sample chamber 2 for holding samples is provided in the sampling tank 1. When sampling, sea water is stored in the sample chamber 2. A sampling port 3 communicating with the sample chamber 2 is provided on one side of the sampling tank 1. A door panel 4 capable of blocking the sampling port 3 is installed in the sample chamber 2. A pressure driving structure is installed on the sampling tank 1. The pressure driving structure is used to drive the door panel 4 to block the sampling port 3. When the sampling tank 1 sinks into the water, the water pressure can drive the door panel 4 to open the sampling port 3. In actual use, assuming that it is necessary to sample sea water at a depth of 1 meter, the sampling tank 1 is sunk into the sea water at a depth of 1 meter. When the sampling tank 1 sinks and reaches the sea water at a depth of 1 meter, the hydraulic pressure at this time drives the pressure driving structure. Due to the structural effect, the pressure-driven structure does not apply a fixed force to the door panel 4. Similarly, under the action of hydraulic pressure, the door panel 4 opens the sampling port 3, and the sea water flows from the sampling port 3 to the sample chamber 2. When the sample chamber 2 is filled with sea water at a depth of 1 meter, the pressure inside and outside the sample chamber 2 is in a balanced state, and the force generated by the hydraulic pressure on the pressure-driven structure is negligible. The pressure-driven structure drives the door panel 4 to seal the sampling port 3, so that the sea water in the sample chamber 2 does not flow out. It should be noted that the sampling tank 1 can only be opened by hydraulic pressure when it sinks to a certain depth in the sea water. Moreover, the device can easily sample sea water even at a depth of tens of meters. It only requires a connecting rope 6 of a corresponding length, without the need for other auxiliary tools, and the operation is equally simple.

[0030] Eight rings 5 are fixedly installed on the periphery of the sampling tank 1. The eight rings 5 are divided into two groups. The four rings 5 in one group are respectively located on the four sides of the sampling tank 1. The two groups are respectively close to the two ends of the sampling tank 1. A connecting rope 6 is detachably connected between the rings 5 on two adjacent sampling tanks 1. Both ends of the connecting rope 6 are equipped with safety buckles, which are connected to the rings 5. In actual operation, if sampling is required at different depths at the same point, the sampling depths are 2 meters, 1.5 meters, 1 meter, and 0.5 meters respectively. 0.5 m long connecting rope 6, and then connect the four sampling tanks 1 in sequence through the connecting rope 6. At this time, when the four sampling tanks 1 are hoisted, the distance between two adjacent sampling tanks 1 is 0.5 m. The counterweight 7 is detachably hoisted on the lowest sampling tank 1. When sampling, a boom can be used, and a 0.5 m long connecting rope 6 is connected to the boom. The other end of the connecting rope 6 is connected to the ring 5 on the sampling tank 1. Then, the connecting rope 6 is used to connect the remaining three sampling tanks 1 in sequence, and then the bottom of the lowest sampling tank 1 is connected. The first side uses the connecting rope 6 to hang a counterweight 7, lifts the boom, and lifts the four sampling tanks 1 and the counterweight 7 to above the liquid surface of the sea water, and gradually sinks the counterweight 7 and the four sampling tanks 1 into the sea water until the position where the boom is connected to the connecting rope 6 contacts the liquid surface of the sea water. Leave it for a few minutes, and then lift the four sampling tanks 1 to complete the sampling of sea water at different depths at the same point. Moreover, this device can be freely matched according to actual needs, and can also be conveniently sampled at any position of the sea water, such as The midpoint of the water in the sea area does not require the installation of additional platforms such as brackets, and only a boom is needed. The structure is simple and the operation is convenient. At the same time, the sampling tank 1 is small in size and easy to store, and does not take up too much space. However, it should be noted that when sampling water in sea areas of different depths, the sampling tank 1 is used differently. The pressure-driven structure in the sampling tank 1 is subjected to different pressures. For example, the water pressure at a depth of 2 meters is twice that at a depth of 1 meter. When the sampling tank 1 used at a depth of 2 meters reaches a depth of 1 meter, the door panel 4 cannot be opened.

[0031] The design of the ring 5 and connecting rope 6 on the periphery of the device facilitates the connection of multiple sampling devices into a network, realizing large-scale, multi-point synchronous monitoring. This group deployment method can cover areas with high activity of Chinese white dolphins (such as the Pearl River Estuary and the coastal waters of Guangdong), providing continuous and comprehensive data for environmental pollution early warning and habitat change monitoring.

[0032] like Figure 2 and Figure 3As shown, the pressure drive structure includes a No. 1 piston block 8, a No. 2 piston block 9, a connecting rod 10, an elastic component and a fixed rotation component;The fixed rotation assembly is used to fix the position of the door panel 4 when it blocks the sample inlet 3. The fixed rotation assembly includes a slide rod 11 and a stop block 12. A rotating shaft 13 is fixedly connected to the door panel 4. The door panel 4 is rotatably installed in the sample chamber 2 through the rotating shaft 13. One end of the rotating shaft 13 passes through the bottom inner wall of the sample chamber 2 and extends to the movable groove and is fixedly connected to the slide rod 11. The slide rod 11 and the rotating shaft 13 are arranged vertically. The bottom end of the stop block 12 is fixedly connected to the No. 1 piston block 8. The slide rod 11 abuts against one side of the stop block 12, and the slide rod 11 slides with the side of the stop block 12. The stop block 12 is provided with an inclined groove on the side close to the slide rod 11. The bottom of the sampling tank 1 is provided with a movable groove adapted to the No. 1 piston block 8, and the No. 1 piston block 8 is slidably installed in the movable groove. , the No. 1 piston block 8 can only move in the movable groove, and the No. 1 piston block 8 cannot rotate in the movable groove. The bottom inner wall of the sample chamber 2 is provided with a driving groove adapted to the No. 2 piston block 9. The No. 2 piston block 9 is slidably installed in the driving groove. The No. 2 piston block 9 can only move in the driving groove. The two ends of the connecting rod 10 are respectively fixedly connected to the No. 1 piston block 8 and the No. 2 piston block 9. After the sampling tank 1 sinks into the sea water, it is affected by the water pressure. The No. 1 piston block 8 will slide in the movable groove, and the sliding No. 1 piston block 8 drives the connecting rod 10 and the No. 2 piston block 9 to slide synchronously. The sliding No. 1 piston block 8 drives the gear block 12 to rise. In the process of the gear block 12 rising, the gear block 12 slides on the slide rod 11. At this time, the gear block 12 and the slide When the rod 11 is in contact with the vertical surface of the stop block 12, until the water pressure on the No. 1 piston block 8 reaches a certain level (that is, when it reaches the specified depth), the stop block 12 rises with the No. 1 piston block 8, and the slide rod 11 reaches the inclined groove on the side of the stop block 12. Since the sample chamber 2 is in an empty state, under the action of external water pressure, the door panel 4 is driven to rotate. When the door panel 4 rotates, the shaft 13 is driven to rotate synchronously. When the shaft 13 rotates, the slide rod 11 is driven to rotate synchronously. The rotating slide rod 11 and the inclined surface of the inclined groove on the side of the stop block 12 slide together, so that the slide rod 11 has a rotating position, so that the door panel 4 can rotate and open the sample inlet 3. The external sea water enters the sample chamber 2 through the sample inlet 3. As seawater enters the sample chamber 2, the external pressure of the sample chamber 2 and the sampling tank 1 gradually decreases. When the seawater fills the sample chamber 2, the water pressure on the No. 1 piston block 8 is negligible. Under the action of the elastic component, the No. 1 piston block 8 is driven to slide and reset. The sliding No. 1 piston block 8 drives the stop block 12 to reset synchronously. The slide rod 11 and the stop block 12 slide in opposite directions until the stop block 12 restricts the rotation position of the slide rod 11, making the door panel 4 unable to rotate and blocking the sampling port 3. The seawater in the sample chamber 2 cannot escape, and the external seawater cannot enter. This ensures that the sample chamber 2 is in a relatively closed and independent space after the sample is collected, so that the seawater sample in the sample chamber 2 is not contaminated by the outside world.

[0033] like Figure 2 As shown, a communication channel is provided between the movable groove and the driving groove, the connecting rod 10 is located in the communication channel, and the diameter of the connecting rod 10 is smaller than the inner diameter of the communication channel. It should be noted that in specific operation, when the water pressure exerts a force on the No. 1 piston block 8, it is necessary to compress the air in the movable groove, and at the same time, it is necessary to compress the air in the sample chamber 2. When the communication channel connects the movable groove and the driving groove, the movable groove, the driving groove and the communication channel form an independent space. When the No. 1 piston block 8 and the No. 2 piston block 9 slide, it is only necessary to compress the cavity in the sample chamber 2. In order to reduce interference factors in the calculation of the elastic force of the elastic component and improve the calculation of the sampling tank 1 being able to complete sampling when it sinks to the corresponding depth, the cross-sectional area of the No. 1 piston block 8 and the cross-sectional area of the No. 2 piston block 9 can be designed to be the same size. When the No. 1 piston block 8 and the No. 2 piston block 9 slide synchronously, the air in the movable groove and the drive groove can be replaced with equal volume. Because the sliding displacement of the No. 1 piston block 8 and the No. 2 piston block 9 is the same, when the cross-sectional areas are different, the air in the independent space may be compressed or expanded, thereby reducing interference with the elastic force calculation of the elastic component.

[0034] like Figure 2 As shown, the elastic component is used to drive the No. 1 piston block 8 to slide and reset in the movable groove; the elastic component includes a straight spring 14; the straight spring 14 is sleeved on the connecting rod 10, and the two ends of the straight spring 14 respectively abut against the No. 1 piston block 8 and the inner wall of the end of the movable groove. A pressure regulating structure is installed on the sampling tank 1, and the pressure regulating structure is used to adjust the compression degree of the straight spring 14. The characteristic of the straight spring 14 is that the greater the amplitude of its compression, the greater the rebound force of the straight spring 14. In the process of the sampling tank 1 sinking into the sea water, as the depth increases, the water pressure also increases. , the sliding displacement of the No. 1 piston block 8 also becomes larger, thereby increasing the degree of squeezing of the straight spring 14. During this process, the shift block 12 slides synchronously with the sliding of the No. 1 piston block 8 and slides on the slide rod 11 until the water pressure reaches a certain level. The position of the inclined groove on the shift block 12 reaches the position of the slide rod 11, and the door panel 4 rotates open under the action of the water pressure. The slide rod 11 is not resisted by the shift block 12, and the inclined surfaces of the inclined grooves on the slide rod 11 and the shift block 12 slide in coordination. It needs to be ensured that the slide rod 11 always rests on the shift block 12.

[0035] like Figure 2As shown, during use, the staff found that when sampling water from different depths, it was necessary to use straight springs 14 of different specifications, that is, it was necessary to replace the sampling tank 1. In this way, when sampling at different depths, a large number of sampling tanks 1 need to be prepared. However, due to the characteristics of the straight spring 14, when the compression degree of the straight spring 14 changes, the force applied when the straight spring 14 is further compressed needs to change. Therefore, the staff improved it and designed an adjustable compression degree of the straight spring 14. After adjusting the compression degree of the straight spring 14, a sampling tank 1 can be used to sample water from different depths. In this way, there is no need to prepare a large number of sampling tanks 1. Each sampling tank 1 can be used within a certain range of the depth, reducing capital investment. Sampling can be flexibly adjusted according to different water quality and water depth conditions in the sea area to ensure that the collected water sample data has high accuracy. This is particularly critical for the dynamically changing coastal water quality environment. These environmental factors directly affect the foraging resources and habitat stability of the Chinese white dolphin.

[0036] like Figure 2 、 Figure 5 、 Figure 6 and Figure 7 As shown, the pressure regulating structure includes a conical ring plate 15 and an adjusting component; the conical ring plate 15 is an annular plate structure, one side of the conical ring plate 15 is a plane, and the other side is a conical surface, as shown in FIG. Figure 2 and Figure 5As shown in , the end of the movable groove is provided with a motion groove adapted to the conical ring plate 15, and the two ends of the straight spring 14 are respectively against the No. 1 piston block 8 and the conical ring plate 15. The adjustment component can adjust the distance between the conical ring plate 15 and the No. 1 piston block 8. The adjustment component includes a movable part 16, an end gear plate 17, a driving gear 18 and an adjusting rod 19. The working principle of the adjustment component is similar to the chuck principle on the lathe. There are multiple movable parts 16, and the multiple movable parts 16 are arranged in a ring array. The motion groove The inner wall is provided with a telescopic hole that slides with the movable part 16. The movable part 16 slides with the inclined surface of the conical ring plate 15 away from the straight spring 14. The end gear plate 17 is rotatably installed in the sampling tank 1. The side of the end gear plate 17 away from the teeth is provided with a right-angle thread 20. The movable part 16 is provided with a thread groove that is adapted to the right-angle thread 20. When the end gear plate 17 rotates, the right-angle thread 20 can slide in the thread groove on the movable part 16, and the driving gear 18 is rotatably installed in the sampling tank 1, driving The gear 18 is meshed with the end gear plate 17. One end of the adjusting rod 19 is fixedly connected to the driving gear 18. The other end of the adjusting rod 19 passes through the sampling tank 1 and extends to the outside of the sampling tank 1. One side of the sampling tank 1 is engraved with angle scales, and the angle scales are located on the outer periphery of the adjusting rod 19. During operation, by rotating the adjusting rod 19, the angle scales are passed through to determine the rotation angle and number of turns of the adjusting rod 19. The adjusting rod 19 drives the driving gear 18 to rotate. Since the driving gear 18 is meshed with the end gear plate 17, The driving gear 18 drives the end gear plate 17 to rotate, and the end gear plate 17 drives the right-angle thread 20 to rotate when rotating. Since the movable part 16 cooperates with the right-angle thread 20, the four movable parts 16 are driven to move closer to each other or away from each other, so that the inclined surface on the movable part 16 and the conical surface of the end gear plate 17 slide together, driving the conical ring plate 15 to displace in the motion groove, thereby changing the compression degree of the straight spring 14. After use, the adjusting rod 19 needs to be rotated and reset each time.

[0037] Example 2: Figure 8As shown, the difference between this embodiment and embodiment 1 lies in the difference in the elastic component. The elastic component includes a constant torque spring 21 and a force rod 22. A mounting groove is provided in the sampling tank 1. The inner ring end of the constant torque spring 21 is fixedly installed in the mounting groove. The outer ring end of the constant torque spring 21 is fixedly connected to the force rod 22. One end of the force rod 22 rests on the No. 1 piston block 8. Due to the characteristics of the constant torque spring 21, the pulling force generated by the constant torque spring 21 on the force rod 22 is constant, that is, when the constant torque spring 21 pulls the force rod 22, the force of the end of the force rod 22 against the No. 1 piston block 8 is always constant. Four constant torque springs 21 and four force rods 22 can be used at the same time to ensure that the force on the No. 1 piston block 8 is uniform. Due to the characteristics of the constant torque spring 21, its depth control when sinking into the sea water can be more accurate.

[0038] A cavity 23 is provided inside the end of the sampling tank 1 away from the No. 1 piston block 8, which can reduce the weight of the top of the sampling tank 1 and enable the sampling tank 1 to remain in a vertical state in the sea water.

[0039] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A water quality monitoring device for sea areas with Chinese white dolphin populations, characterized in that: The invention comprises a sampling tank (1) and a counterweight (7), wherein a sample cavity (2) for containing a sample is provided in the sampling tank (1), a sampling port (3) communicating with the sample cavity (2) is provided on one side of the sampling tank (1), a door panel (4) capable of blocking the sampling port (3) is installed in the sample cavity (2), a pressure driving structure is installed on the sampling tank (1), and the pressure driving structure is used to drive the door panel (4) to block the sampling port (3), and when the sampling tank (1) is immersed in water, the water pressure can drive the door panel (4) to open the sampling port (3); A plurality of rings (5) are fixedly mounted on the outer periphery of the sampling tank (1); a connecting rope (6) is detachably connected between the rings (5) on two adjacent sampling tanks (1); and the counterweight (7) is detachably hoisted on the lowest sampling tank (1); The pressure drive structure comprises a No. 1 piston block (8), a No. 2 piston block (9), a connecting rod (10), an elastic component and a fixed rotation component; a movable groove adapted to the No. 1 piston block (8) is provided at the bottom of the sampling tank (1), and the No. 1 piston block (8) is slidably mounted in the movable groove; a driving groove adapted to the No. 2 piston block (9) is provided on the bottom inner wall of the sample chamber (2), and the No. 2 piston block (9) is slidably mounted in the driving groove; and both ends of the connecting rod (10) are fixedly connected to the No. 1 piston block (8) and the No. 2 piston block (9) respectively; The elastic component is used to drive the first piston block (8) to slide and reset in the movable groove; The fixed rotation assembly is used to fix the position of the door plate (4) when it blocks the injection port (3); The fixed rotation assembly includes a slide rod (11) and a stop block (12), a rotating shaft (13) is fixedly connected to the door panel (4), and the door panel (4) is rotatably installed in the sample chamber (2) through the rotating shaft (13). One end of the rotating shaft (13) passes through the bottom inner wall of the sample chamber (2) and extends into the movable groove and is fixedly connected to the slide rod (11). The slide rod (11) and the rotating shaft (13) are arranged vertically. The bottom end of the stop block (12) is fixedly connected to the No. 1 piston block (8). The slide rod (11) abuts against one side of the stop block (12), and the slide rod (11) and the side of the stop block (12) are slidably matched. The stop block (12) is provided with an inclined groove on the side close to the slide rod (11).

2. The water quality monitoring device for sea areas with Chinese white dolphin populations according to claim 1 is characterized in that: A communication channel is provided between the movable groove and the driving groove, the connecting rod (10) is located in the communication channel, and the diameter of the connecting rod (10) is smaller than the inner diameter of the communication channel.

3. The water quality monitoring device for sea areas with Chinese white dolphin populations according to claim 2 is characterized in that: The elastic component includes a straight spring (14); the straight spring (14) is sleeved on the connecting rod (10), and the two ends of the straight spring (14) respectively abut against the inner wall of the end of the No. 1 piston block (8) and the movable groove; A pressure regulating structure is installed on the sampling tank (1), and the pressure regulating structure is used to adjust the compression degree of the straight spring (14).

4. The water quality monitoring device for sea areas with Chinese white dolphin populations according to claim 3 is characterized in that: The pressure regulating structure includes a conical ring plate (15) and an adjusting assembly; a motion groove adapted to the conical ring plate (15) is provided at the end of the movable groove, and both ends of the straight spring (14) respectively abut against the No. 1 piston block (8) and the conical ring plate (15), and the adjusting assembly can adjust the distance between the conical ring plate (15) and the No. 1 piston block (8).

5. The water quality monitoring device for sea areas with Chinese white dolphin populations according to claim 4 is characterized in that: The adjustment assembly includes a movable part (16), an end face gear plate (17), a driving gear (18) and an adjustment rod (19). The number of the movable parts (16) is multiple, and the multiple movable parts (16) are arranged in a ring array. The inner wall of the motion groove is provided with a telescopic hole that slides with the movable part (16). The movable part (16) slides with the inclined surface of the conical ring plate (15) away from the straight spring (14). The end face gear plate (17) is rotatably installed in the sampling tank (1). The side of the end face gear plate (17) away from the teeth is provided with a right-angle thread (20). The movable part (16) is provided with a telescopic hole that slides with the movable part (16). A thread groove is provided which is adapted to the right-angle thread (20). When the end face gear plate (17) rotates, the right-angle thread (20) can slide in the thread groove on the movable part (16). The driving gear (18) is rotatably installed in the sampling tank (1). The driving gear (18) is engaged with the end face gear plate (17). One end of the adjusting rod (19) is fixedly connected to the driving gear (18). The other end of the adjusting rod (19) passes through the sampling tank (1) and extends to the outside of the sampling tank (1). One side of the sampling tank (1) is engraved with an angle mark, and the angle mark is located on the outer periphery of the adjusting rod (19).

6. The water quality monitoring device for sea areas with Chinese white dolphin populations according to claim 2 is characterized in that: The elastic component includes a constant torque spring (21) and a force rod (22); a mounting groove is provided in the sampling tank (1), the inner ring end of the constant torque spring (21) is fixedly mounted in the mounting groove, the outer ring end of the constant torque spring (21) is fixedly connected to the force rod (22), and one end of the force rod (22) rests on the No. 1 piston block (8).

7. The water quality monitoring device for sea areas with Chinese white dolphin populations according to claim 1 is characterized in that: A cavity (23) is provided inside the sampling tank (1) at one end away from the first piston block (8).

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