A sampling device for lake water quality detection

Abstract

The utility model provides a kind of sampling device for lake water quality detection, including conical grass shell, conical grass shell bottom is sealingly connected with water taking cylinder, water taking cylinder bottom is fixedly connected with inverted conical counterweight, water taking cylinder upper portion side is communicated with water inlet, counterweight bottom side is equipped with the water outlet being communicated with water taking cylinder, and detachably connected with sealing cover on water outlet, conical grass shell inside is vertically equipped with rectangular column, sliding sleeve is equipped with lifting cylinder on rectangular column outside, lifting cylinder top is vertically equipped with pull rod, pull rod top end is movably passed through conical grass shell top and extends outward, conical grass shell is circumferentially spaced apart and is equipped with multiple long slot, rectangular column and lifting cylinder outside are hingedly connected with multiple weed cutting components that can pass through long slot, the compression spring is connected between rectangular column lower end and conical grass shell bottom surface;The device effectively solves the entanglement problem of existing equipment when sampling in weed dense water area, improves sampling efficiency and reduces equipment damage risk.

Description

Technical Field

[0001] This utility model belongs to the field of sampling device technology, specifically relating to a sampling device for lake water quality testing. Background Technology

[0002] Water samplers are used to help people understand the types, quantities, and distribution of various chemical and biological substances in water. By analyzing and testing water samples, the pollution status of water bodies and the trend of water quality changes can be assessed. Water sampling plays an important role in water resource protection.

[0003] When existing sampling equipment is used for deep sampling in waters with dense weeds, the sampling bucket often gets tangled in the weeds, making it difficult to retrieve the equipment smoothly. This not only affects the sampling efficiency but may also cause damage to the equipment. Therefore, it is necessary to improve the equipment. Utility Model Content

[0004] This invention provides a sampling device for lake water quality testing to solve the problem of entanglement of existing equipment when sampling in waters with dense weeds, thereby improving sampling efficiency and reducing the risk of equipment damage. The specific solution is as follows: A sampling device for lake water quality testing includes a conical grass-breaking shell. A water-collecting cylinder is sealed to the bottom of the conical grass-breaking shell. An inverted conical counterweight is fixedly connected to the bottom of the water-collecting cylinder. A water inlet is connected to one side of the upper part of the water-collecting cylinder. An outlet connected to the water-collecting cylinder is provided on one side of the bottom surface of the counterweight, and a sealing cap is detachably connected to the outlet. A rectangular column is vertically arranged inside the conical grass-breaking shell. A lifting cylinder is slidably sleeved on the outer side of the rectangular column. A pull rod is vertically arranged at the top of the lifting cylinder. The top of the pull rod moves through the top of the conical grass-breaking shell and extends outward. Multiple elongated slots are spaced apart around the circumference of the conical grass-breaking shell. Multiple weed-cutting components that can pass through the elongated slots are hinged to the outer side of the rectangular column and the lifting cylinder at intervals. A compression spring is connected between the lower end of the rectangular column and the bottom surface of the conical grass-breaking shell.

[0005] Furthermore, the weed cutting assembly includes a mounting plate, a cutting blade, and a connecting block. One end of the mounting plate is rotatably connected to the lower side of the rectangular column. One end of the connecting block is rotatably connected to the mounting plate, and the other end is rotatably connected to the lifting cylinder. The cutting blade is detachably mounted on the upper surface of the mounting plate and corresponds to the elongated through groove.

[0006] Furthermore, mounting plates are rotatably connected to the four sides of the rectangular column, and connecting blocks are rotatably connected to the four mounting plates. The four connecting blocks are rotatably connected to the four sides of the lifting cylinder.

[0007] Furthermore, a return spring is fitted onto the pull rod inside the conical grass-breaking shell.

[0008] Furthermore, the pull rod end on the outer side of the conical grass hull is provided with a pull ring, and a cable is connected to the pull ring.

[0009] Furthermore, a scale line is provided on one side of the cable along its length, a float is movably sleeved on the cable, and a limiting component is also provided on the cable to restrict the position of the float. The buoyancy of the float is greater than the total weight of the cone-shaped grass breaker, the counterweight, and the water-collecting tube after water is collected.

[0010] Furthermore, the limiting component is a pin, and the cable has multiple through holes horizontally opened opposite to the scale lines, with the pin inserted into the through holes.

[0011] The beneficial effects of this utility model are: 1. The present invention relates to a sampling device for lake water quality testing. Through the synergistic action of multiple types of blades in the weed cutting component, the weeds wrapped around the cone-shaped weed cutter can be quickly cut off, effectively solving the entanglement problem of existing equipment when sampling in waters with dense weeds, improving sampling efficiency and reducing the risk of equipment damage.

[0012] 2. The sampling device for lake water quality testing of this utility model has a depth positioning component that uses a float and a scale to achieve precise adjustment and control of the sampling depth, ensuring that water samples are collected at the target depth and improving the accuracy of the test data. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the conical grass-breaking structure of this utility model from below; Figure 3 This is a schematic cross-sectional view of the conical grass-breaking structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of the conical grass-breaking shell of this utility model; Figure 5 This is a schematic diagram of the mounting plate, smooth cutter, forward cutter, and reverse cutter of this utility model.

[0014] Explanation of reference numerals in the attached diagram: 1. Conical grass husk breaker; 2. Water intake cylinder; 3. Rectangular column; 4. Lifting cylinder; 5. Mounting plate; 6. Connecting block; 7. Pull rod; 8. Return spring; 9. Long strip-shaped channel; 10. Cable; 11. Cutting blade; 15. Float; 16. Scale line; 17. Compression spring; 18. Water inlet; 19. Water outlet; 20. Counterweight. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] See Figure 1-5 A sampling device for lake water quality testing includes a conical grass-breaking shell 1. A water-collecting cylinder 2 is sealed to the bottom of the conical grass-breaking shell 1, with the bottom surface of the conical grass-breaking shell 1 separated from the top surface of the water-collecting cylinder 2 to prevent water from entering the water-collecting cylinder 2. An inverted conical counterweight 20 is fixedly connected to the bottom of the water-collecting cylinder 2. The counterweight 20 is a solid structure. An inlet 18 is connected to the upper side of the water-collecting cylinder 2, and an outlet 19 connected to the water-collecting cylinder is located on the bottom side of the counterweight 20. A sealing cap is detachably connected to the outlet 19, which has an external thread and an internal thread matching the external thread. The cap is unscrewed after water collection. Simply pour out the sampled water from the sealed cap. Inside the conical weed breaker 1, there is a vertically arranged rectangular column 3. A lifting cylinder 4 is slidably mounted on the outer side of the rectangular column. A pull rod 7 is vertically mounted on the top of the lifting cylinder 4. The top of the pull rod 7 moves through the top of the conical weed breaker 1 and extends outward. The conical weed breaker 1 has multiple elongated slots 9 spaced apart around its circumference. Multiple weed cutting components that can pass through the elongated slots 9 are hinged to the outer side of the rectangular column 3 and the lifting cylinder 4 at intervals. A compression spring 17 is connected between the lower end of the rectangular column 3 and the bottom surface of the conical weed breaker 1. The compression spring 17 is designed to keep the cutting blade 11 stationary and located inside the conical weed breaker 1 under natural conditions through the tension of the compression spring 17.

[0017] The preferred weed cutting assembly includes a mounting plate 5, a cutting blade 11, and a connecting block 6. One end of the mounting plate 5 is rotatably connected to the lower side of the rectangular column 3. One end of the connecting block 6 is rotatably connected to the mounting plate 5, and the other end is rotatably connected to the lifting cylinder 4. The cutting blade 11 is detachably mounted on the upper surface of the mounting plate 5, and the cutting blade 11 corresponds to the elongated through groove 9.

[0018] The preferred rectangular column 3 has mounting plates 5 rotatably connected to its four sides, and connecting blocks 6 rotatably connected to the four mounting plates 5. The four connecting blocks 6 are rotatably connected to the four sides of the lifting cylinder 4.

[0019] A return spring 8 is fitted on the pull rod inside the preferred conical grass-breaking shell 1. Specifically, when the spring 8 is in its natural state, the lifting cylinder 4 is located at the lower part of the rectangular column 3. At this time, the mounting plate 5 and the cutting blade 11 are retracted inside the conical grass-breaking shell 1. When the lifting cable 10 is pulled to raise the lifting cylinder 4, the return spring 8 is compressed and stores elastic potential energy. After the cable 10 is released, the elastic force of the return spring 8 is released, pushing the lifting cylinder 4 to move down and reset, thereby driving the rotating plate 5 and the blade carrier 11 to retract. The elastic force of the return spring 8 is greater than the total weight of the device after water intake, ensuring that the reset action can be reliably completed even when the device is fully loaded with water samples, avoiding long-term exposure of the blade.

[0020] The preferred conical grass husk 1 has a pull ring at the end of the pull rod 7 on the outside, and a cable 10 is connected to the pull ring.

[0021] The preferred cable 10 has a scale line 16 along its length on one side, which facilitates precise depth positioning. A float 15 is movably fitted on the cable 10. The float 15 is made of lightweight, high-strength buoyancy material. The cable 10 also has a limiting component to restrict the position of the float 15. The buoyancy of the float 15 is greater than the total weight of the cone-shaped grass husk 1, the counterweight 20, and the water-collecting tube 2 after water is collected.

[0022] The preferred limiting component is a pin. The cable 10 has multiple through holes horizontally opposite to the scale line 16. The pin is inserted into the through holes, thereby limiting and fixing the float 15 and achieving precise positioning of the device's sinking position.

[0023] The working principle of this utility model: In this device, the weed cutting component is the core structure for dealing with the problem of weed entanglement in water. The rectangular column 3 provides a stable hinge support point for the mounting plate 5. The four mounting plates 5 are evenly distributed around the rectangular column 3 to ensure that the cutting range covers the outer perimeter of the device and reduces dead angles of entanglement. The connecting block 6 acts as a transmission medium to convert the linear motion of the lifting cylinder 4 into the rotational motion of the rotating plate 5, thereby realizing the extension and retraction of the cutting blade 11. The position and size of the elongated through groove 9 are precisely matched with the mounting plate 5, ensuring that the mounting plate 5 can pass smoothly and limiting the mounting plate 5 in the non-working state to prevent it from swinging and extending arbitrarily. The shape of the cone-shaped grass-breaking shell 1 can break the weeds during the upward movement. Only when the cone-shaped grass-breaking shell 1 cannot break the weeds will the weeds wrapped around the cone-shaped grass-breaking shell 1 generate a downward pulling force. Therefore, it is necessary to pull the cable 10 with force. During the process of applying force, the pull rod 7 can compress the return spring 8, which can drive the mounting plate 5 to rotate and drive the cutting blade 11 to clean the weeds. Under normal conditions, the cable 10 can directly pull the cone-shaped grass-breaking shell 1 and the water tank 2 to draw water. Only when the weeds are wrapped around the cone-shaped grass-breaking shell 1 and form resistance, and the cone-shaped grass-breaking shell 1 cannot break the weeds, can the weed cutting component inside the cone-shaped grass-breaking shell 1 be triggered. Specifically, the position of the float 15 on the cable 10 is adjusted by referring to the scale line 16. After determining the sampling depth, the float 15 is fixed with a pin. Then, the device is slowly lowered into the water. The conical counterweight 20 at the bottom of the water collection tube 2 initially clears away the surface weeds. The device sinks under gravity. At this time, the return spring 8 and the compression spring 17 are in their natural state. The mounting plate 5 and the cutting blade 11 are located inside the conical weed-breaking shell 1. When the device sinks to the set depth, the buoyancy of the float 15 balances the weight of the device, and the device stops sinking. The water collection tube 2 begins to collect water samples. When the recovery device encounters weeds, the staff moves upwards... Pulling the cable 10 causes the lever 7 and the lifting cylinder 4 to rise. The return spring 8 is compressed and the compression spring 17 is stretched. At this time, the lifting cylinder 4 pulls the mounting plate 5 to rotate upward around the hinge point through the connecting block 6. The cutting blade 11 extends out from the long through slot 9 and cuts the tangled weeds. At this time, the water collection cylinder 2 is gradually lifted upward. After the weeds are cut, the elastic force of the return spring 8 and the elastic force of the compression spring 17 will push the lifting cylinder 4 to reset, causing the mounting plate 5 to retract into the conical weed-breaking shell 1 to prevent the cutting blade 11 from injuring people. After the device is taken out of the water, unscrew the sealing cap and pour out the sampled water.

[0024] During the process of water intake tube 2 descending to take water, since the water inlet 18 is always open, a small portion of the water above the water surface will enter the water intake tube 2 when it descends. Therefore, multiple water intake tests are required to ensure the accuracy of the test as much as possible.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sampling device for lake water quality testing, characterized in that: The device includes a conical grass-breaking shell (1), with a water-collecting cylinder (2) sealed to the bottom of the conical grass-breaking shell (1). An inverted conical counterweight (20) is fixedly connected to the bottom of the water-collecting cylinder (2). An inlet (18) is connected to the upper side of the water-collecting cylinder (2). An outlet (19) connected to the water-collecting cylinder is provided on one side of the bottom surface of the counterweight (20), and a sealing cap is detachably connected to the outlet (19). A rectangular column (3) is vertically arranged inside the conical grass-breaking shell (1), and the outer side of the rectangular column slides upward. The moving sleeve is equipped with a lifting cylinder (4), and a pull rod (7) is vertically provided at the top of the lifting cylinder (4). The top of the pull rod (7) moves through the top of the conical grass-breaking shell (1) and extends outward. The conical grass-breaking shell (1) is provided with multiple long strip-shaped through slots (9) spaced apart around its circumference. The rectangular column (3) and the outer side of the lifting cylinder (4) are hinged with multiple weed cutting components that can pass through the long strip-shaped through slots (9). A compression spring (17) is connected between the lower end of the rectangular column (3) and the bottom surface of the conical grass-breaking shell (1).

2. The sampling device for lake water quality testing according to claim 1, characterized in that: The weed cutting assembly includes a mounting plate (5), a cutting blade (11), and a connecting block (6). One end of the mounting plate (5) is rotatably connected to the lower side of the rectangular column (3). One end of the connecting block (6) is rotatably connected to the mounting plate (5), and the other end is rotatably connected to the lifting cylinder (4). The cutting blade (11) is detachably mounted on the upper surface of the mounting plate (5), and the cutting blade (11) corresponds to the elongated through groove (9).

3. The sampling device for lake water quality testing according to claim 2, characterized in that: Mounting plates (5) are rotatably connected to the four sides of the rectangular column (3), and connecting blocks (6) are rotatably connected to the four mounting plates (5). The four connecting blocks (6) are rotatably connected to the four sides of the lifting cylinder (4).

4. The sampling device for lake water quality testing according to claim 1, characterized in that: A return spring (8) is fitted on the pull rod inside the conical grass husk (1).

5. A sampling device for lake water quality testing according to claim 1, characterized in that: The pull rod (7) on the outside of the cone-shaped grass husk (1) is provided with a pull ring at the end, and a cable (10) is connected to the pull ring.

6. A sampling device for lake water quality testing according to claim 5, characterized in that: The cable (10) has a scale line (16) along its length on one side. A float (15) is movably sleeved on the cable (10). The cable (10) is also provided with a limiting component for limiting the position of the float (15). The buoyancy of the float (15) is greater than the total weight of the cone-shaped grass husk (1), the counterweight (20), and the water-collecting tube (2) after water is collected.

7. A sampling device for lake water quality testing according to claim 6, characterized in that: The limiting component is a pin, and the cable (10) has multiple through holes horizontally opposite to the scale line (16), and the pin is inserted into the through holes.

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