A device and method for measuring and sampling the thickness of sludge at the bottom of a basin

Abstract

This invention discloses a device and method for measuring and sampling the thickness of silt at the bottom of a pool, comprising a first cylinder and a second cylinder; the second cylinder is sleeved outside the first cylinder, and a valve structure is disposed within the first cylinder; a first connecting rod connected to the valve structure is disposed through the sidewalls of the first and second cylinders; the first connecting rod can drive the valve structure to rotate freely within the first cylinder; a second connecting rod and an elastic element are disposed between the first connecting rod and the first cylinder; the elastic element is connected to the second connecting rod and the first cylinder respectively; a groove structure is disposed on the second cylinder to limit the movement of the first and second connecting rods; the elastic element, when compressed, allows the second connecting rod to be housed within the groove structure, thus fixing the compression state of the elastic element relatively; the elastic element can be released when the second cylinder and the first cylinder move relative to each other, causing the first connecting rod, the second connecting rod, and the valve structure to rotate, thereby closing the end of the first cylinder.

Description

Technical Field

[0001] This invention relates to the field of detection technology, and in particular to a device and method for measuring and sampling the thickness of silt at the bottom of a pool. Background Technology

[0002] In water treatment processes, water tanks are typically constructed of concrete, and the water within them is usually flowing and has a certain degree of turbidity. Some water tanks, due to their sedimentation process, gradually accumulate sludge at the bottom; the thickness of this sludge affects the water treatment effectiveness.

[0003] In existing technologies, it is sometimes necessary to sample sediment and simultaneously measure sludge thickness. Common methods for measuring sludge thickness include ultrasonic sensors, optical sensors, and capacitive sensors. However, sampling using these methods presents the following problems: the lower layer of water in the pool has high turbidity, which may lead to errors in ultrasonic sensor measurements. High-turbidity pool water has poor light transmittance, resulting in poor light sensitivity of optical sensors. Sludge negatively impacts the lifespan of capacitive sensors.

[0004] Commonly used methods for collecting bottom sediment samples typically employ bucket-type and tubular sediment samplers.

[0005] Bucket-type mud sampler introduction: The sampling structure consists of two clamping buckets. The implementation method is to first submerge the buckets to the bottom of the water, then close the buckets to dredge the silt, and finally lift the buckets to complete the sampling.

[0006] Disadvantages of bucket-type mud samplers: These samplers can only excavate surface silt. After the bucket is closed, the seal may not be tight, allowing the sample collected during the lifting process to be washed away by water.

[0007] Tube-type mud sampler: also known as a column-type mud sampler. The sampling structure consists of one or more tubular columns. The method involves vertically inserting the sampling tube into the silt, and then lifting the tube to collect the sample.

[0008] Disadvantages of tubular mud samplers: Some patents use negative pressure to suck up sludge, which may draw in some water; the suction effect is poor when the sludge is hard. Some solutions use check valves to seal the sample, but this can lead to obstructed sludge entry; if the sludge is hard, it may prevent the valve core from returning to the shut-off position, resulting in poor sealing.

[0009] Application No. 201920600696.X discloses a device for measuring the thickness of sediment at the bottom of a wastewater treatment tank. This device uses multiple transparent PVC pipes connected by a union, with a ball-shaped check valve at the bottom. Each PVC pipe has graduations. The implementation involves vertically inserting the PVC pipe into the sediment, then lifting it up and visually reading the depth of the sediment in the pipe. However, the check valve can obstruct the entry of sediment, causing errors in the amount of sediment entering the pipe. When the sediment is relatively hard, it may prevent the check valve core from returning to the cut-off position, causing sediment leakage when lifting the pipe and resulting in measurement errors.

[0010] In summary, existing technologies for sampling and measuring sludge have the following technical shortcomings:

[0011] (1) Sensor-based technologies for measuring the thickness of silt at the bottom of the pool may produce errors when the turbidity of the water is high.

[0012] (2) Many types of mud samplers have the problem of poor sealing of the sampling chamber.

[0013] (3) Bucket-type mud extractors can only extract surface silt.

[0014] (4) The negative pressure suction technology for sludge may draw in some water, which may cause errors in sludge sampling and thickness measurement. The suction effect is not good when the sludge is relatively hard.

[0015] (5) The technique of using a check valve to seal the sampling chamber will prevent the sludge from entering smoothly, resulting in errors in sludge sampling and thickness measurement. If the sludge is hard, it may block the valve core from returning to the cut-off position, resulting in poor sealing. Summary of the Invention

[0016] The purpose of this invention is to provide a device and method for measuring and sampling the thickness of silt at the bottom of a pond, addressing the aforementioned shortcomings and solving the problems of low efficiency and low accuracy in silt collection and measurement in the prior art.

[0017] This invention is achieved through the following scheme:

[0018] A device for measuring and sampling the thickness of sludge at the bottom of a pool includes a first cylinder and a second cylinder. The second cylinder is fitted over the outside of the first cylinder, and a valve structure is disposed within the first cylinder. A first connecting rod, connected to the valve structure, is disposed through the sidewalls of the first and second cylinders. The first connecting rod can drive the valve structure to rotate freely within the first cylinder. A second connecting rod and an elastic element are disposed between the first connecting rod and the first cylinder. The elastic element is connected to both the second connecting rod and the first cylinder. A groove structure is disposed on the second cylinder to limit the movement of the first and second connecting rods. When the elastic element is compressed, it can accommodate the second connecting rod within the groove structure, thus fixing the compression state of the elastic element. When the second cylinder and the first cylinder move relative to each other, the elastic element can be released, causing the first connecting rod, the second connecting rod, and the valve structure to rotate, thereby closing the end of the first cylinder.

[0019] Based on the structure of the above-mentioned pool bottom sludge thickness measurement and sampling device, the tank structure includes a limiting groove and a release groove; the limiting groove is arranged parallel to the central axis of the second cylinder and perpendicular to the opening end of the second cylinder; the release groove is an arc-shaped structure, and one end of the release groove is connected to a predetermined position of the limiting groove.

[0020] Based on the structure of the above-mentioned device for measuring and sampling the thickness of silt at the bottom of a pool, the arc structure of the release groove is 1 / 4 of the circular structure formed by the distance from the second connecting rod to the first connecting rod as the radius.

[0021] Based on the structure of the above-mentioned pool bottom sludge thickness measurement and sampling device, the second connecting rod and the valve structure are arranged in the same vertical plane. The second connecting rod includes a first rod body and a second rod body. The first rod body is arranged perpendicular to the release groove. The second rod body is connected to the first rod body and the first connecting rod. The first rod body is connected to the outer wall of the first cylinder through an elastic element.

[0022] Based on the structure of the above-mentioned pool bottom sludge thickness measurement and sampling device, a knob is provided on the end of the first connecting rod away from the valve structure, and the knob is set perpendicular to the first connecting rod; the valve structure is a butterfly valve plate, and the shape and structure of the butterfly valve plate are adapted to the cross-sectional structure of the first cylinder.

[0023] Based on the structure of the above-mentioned device for measuring and sampling the thickness of silt at the bottom of a pool, a scale is set along the length of the first cylinder; both the first and second cylinders are made of transparent material.

[0024] Based on the structure of the above-mentioned pool bottom sludge thickness measurement and sampling device, multiple interconnected first cylinders form a measuring tool of a predetermined length, and a plumb line is provided on the topmost first cylinder.

[0025] Based on the structure of the above-mentioned device for measuring and sampling the thickness of silt at the bottom of a pool, the vertical alignment part includes a contact pipe, a connecting pipe, and a water storage chamber; the water storage chamber is enclosed with liquid and air bubbles, the contact pipe is connected to the first cylinder at the far end, the connecting pipe is disposed between the water storage chamber and the connecting pipe, and the connecting pipe is provided with a ventilation groove.

[0026] Based on the structure of the above-mentioned pool bottom sludge thickness measurement and sampling device, the water storage cavity is made of transparent material and the end away from the first cylinder has a hemispherical structure; the first cylinders are connected by threads, and the contact tube is connected to the first cylinder by threads.

[0027] This invention also provides a method for measuring and sampling the thickness of silt at the bottom of a pond; specifically, it includes the following steps:

[0028] Step 1: Preparation. The operator arrives at the target position and assembles the first cylinder, the second cylinder, and the vertical alignment part. Turn the knob to move the second connecting rod from the release groove into the limiting groove. During this process, the second connecting rod will gradually compress the spring. When the second connecting rod is in the limiting groove, the butterfly valve plate will also be in a vertical position. At this time, pull the second cylinder out of the limiting groove a predetermined distance. The preparation is now complete.

[0029] Step Two: Measurement and Sampling: The operator inserts the measuring tool vertically into the water tank, constantly observing the air bubble in the plumb bob to ensure it remains centered. After the measuring tool touches the bottom of the tank, the operator presses down firmly to fully retract the second cylinder, causing the second connecting rod to move from the limiting groove into the release groove. When the second connecting rod is in the release groove, the spring releases, pushing the second connecting rod to a horizontal position. When the second connecting rod is in the horizontal position, the butterfly valve plate also moves to a horizontal position, at which point the bottom of the first cylinder is closed, sealing the sludge and water in the first cylinder.

[0030] Step 3: Sample recovery and reading: The operator lifts the measuring tool out of the pool and observes the position of the pool water and sludge in the transparent first tube. The first tube is removed section by section by thread, and the pool water in the first tube is drained. The lower layer of the first tube containing the sludge at the bottom of the pool is retained. The thickness of the sludge at the bottom of the pool can be determined by reading the scale on the first tube.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] 1. This solution can simultaneously measure the thickness of silt at the bottom of the pool and collect silt samples. The silt thickness measurement is relatively accurate, the silt samples are tightly sealed, it can be used in high turbidity pool water conditions, it can be used in flowing water conditions, it is easy to carry, simple to operate, can be operated by a single person, and is inexpensive. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the valve structure when it is open in Embodiment 1 of the present invention;

[0035] Figure 3 This is a schematic diagram of the valve structure when closed in Embodiment 1 of the present invention;

[0036] Figure 4 This is a schematic diagram of the structure in Embodiment 2 of the present invention;

[0037] Figure descriptions: 1. First cylinder; 2. Second cylinder; 3. Valve structure; 4. First connecting rod; 5. Second connecting rod; 6. Elastic element; 7. Groove structure; 8. Knob; 9. Scale; 10. Vertical alignment; 51. First rod; 52. Second rod; 71. Limiting groove; 72. Release groove; 101. Contact pipe; 102. Connecting pipe; 103. Water storage chamber; 104. Ventilation groove; 105. Air bubble; 106. Threaded connection. Detailed Implementation

[0038] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0039] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0040] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0042] Example 1

[0043] like Figures 1-3 As shown, the present invention provides a technical solution:

[0044] A device for measuring and sampling the thickness of sludge at the bottom of a pool includes, but is not limited to, a first cylinder 1 and a second cylinder 2. The second cylinder 2 is fitted over the outside of the first cylinder 1, and a valve structure 3 is disposed within the first cylinder 1. A first connecting rod 4, connected to the valve structure 3, is disposed through the sidewalls of the first cylinder 1 and the second cylinder 2. The first connecting rod 4 can drive the valve structure 3 to rotate freely within the first cylinder 1, thereby achieving the closure and opening of the end of the first cylinder 1. A second connecting rod 5 and an elastic element 6 are disposed between the first connecting rod 4 and the first cylinder 1. The elastic element 6 is connected to the second connecting rod 5 and the first cylinder 1 respectively. A groove structure 7 is disposed on the second cylinder 2 to limit the movement of the first connecting rod 4 and the second connecting rod 5. When the elastic element 6 is compressed, it can accommodate the second connecting rod 5 within the groove structure 7, thereby fixing the compression state of the elastic element 6. When the second cylinder 2 and the first cylinder 1 move relative to each other, the elastic element 6 can be released, causing the first connecting rod 4, the second connecting rod 5, and the valve structure 3 to rotate, thereby achieving the closure of the end of the first cylinder 1.

[0045] Based on the above structure, this solution, through a specially designed linkage structure, can simultaneously measure and sample the height of the sludge at the bottom of the pool. It is simple to operate, highly efficient, and provides accurate and reliable test results. When sampling and height measurement of the sludge are required, only the first connecting rod 4 or the second connecting rod 5 needs to be rotated to open the valve structure 3 and engage the second connecting rod 5 in the tank structure 7, compressing the elastic element 6 and placing the entire device in a ready-to-trigger state. During sampling, only downward pressure needs to be applied to the second cylinder 2, forcing relative movement between the first cylinder 1 and the second cylinder 2. The applied pressure only needs to be greater than the elastic force generated when the elastic element 6 is compressed. Finally, when the device moves to the predetermined position, the elastic element 6 is released, causing the valve to rotate and close the end of the first cylinder 1, thus achieving sampling and height measurement of the sludge.

[0046] As an example, the tank structure 7 may include a limiting groove 71 and a release groove 72; the limiting groove 71 is arranged parallel to the central axis of the second cylinder 2 and perpendicular to the opening end of the second cylinder 2; the release groove 72 is an arc-shaped structure, and one end of the release groove 72 is connected to a predetermined position of the limiting groove 71.

[0047] The radius of the arc of the release groove 72 is the straight-line length of the distance between the second link 5 and the first link 4.

[0048] Based on the above structure, the first connecting rod 4 penetrates the side wall of the first cylinder 1 and passes through the limiting groove 71. The second connecting rod 5 can be rotated into the limiting groove 71. When the first connecting rod 4 and the second connecting rod 5 are simultaneously locked by the limiting groove 71, the limiting groove 71 can restrict the rotation state of the valve structure 3 connected to the first connecting rod 4. At this time, the valve structure 3 is parallel to the limiting groove 71, and the end of the first cylinder 1 is in a fully open state. When the first cylinder 1 and the second cylinder 2 move relative to each other, the first connecting rod 4 and the second connecting rod 5 will be forced to rotate within the limiting groove 71. When the position of the second link 5 in the slot 71 changes, when the second link 5 moves to the junction of the release slot 72 and the limiting slot 71, the second link 5 will move in a circular motion around the arc structure of the release slot 72 under the elastic force of the elastic element 6, and simultaneously drive the valve structure 3 connected to the first link 4 to move in a circular motion, thereby achieving the closure of the end of the cylinder. Setting the arc radius of the release slot 72 to the straight-line length of the distance between the second link 5 and the first link 4 can enable the second link 5 to rotate smoothly in the release slot 72.

[0049] As an example, the arc structure of the release groove 72 is 1 / 4 of the circular structure formed with the distance from the second link 5 to the first link 4 as the radius.

[0050] Based on the above structure, under the action of the elastic element 6, the end of the release groove 72 away from the limiting groove 71 can also limit the extreme position of the second connecting rod 5, so that the second connecting rod 5 can only move 1 / 4 arc under the action of the elastic element 6, and simultaneously rotate the valve structure 3 by 90° to close the end of the first cylinder 1.

[0051] As an example, the second connecting rod 5 and the valve structure 3 are arranged in the same vertical plane. The second connecting rod 5 may include a first rod body 51 and a second rod body 52. ​​The first rod body 51 is arranged perpendicular to the release groove 72. The second rod body 52 is connected to the first rod body 51 and the first connecting rod 4. The first rod body 51 is connected to the outer wall of the first cylinder 1 through the elastic member 6.

[0052] Based on the above structure, setting the first rod 51 to be perpendicular to the release groove 72 can prevent the first rod 51 from interfering with the release groove 72 during rotation, thus ensuring smooth rotation.

[0053] As an example, a knob 8 may be provided on the end of the first link 4 away from the valve structure 3, and the knob 8 is set perpendicular to the first link 4.

[0054] Based on the above structure, the first connecting rod 4 and its valve structure 3 can be quickly rotated by the knob 8, which facilitates the use of the device and reduces the difficulty of operation.

[0055] As an example, valve structure 3 can be a butterfly valve plate, the shape and structure of which are adapted to the cross-sectional structure of the first cylinder 1.

[0056] Based on the above structure, by setting a butterfly valve plate that matches the shape and structure of the first cylinder 1, the valve plate can close the opening end of the first cylinder 1 when it is rotated, thereby realizing sampling.

[0057] As an example, a scale 9 can be set along the length of the first cylinder 1. The height of the collected sample can be read quickly through the scale 9. The elastic element 6 can be a spring.

[0058] As an example, both the first cylinder 1 and the second cylinder 2 are made of transparent material.

[0059] In this embodiment, the butterfly valve plate seals the sludge sample collected inside the measuring tube. The first connecting rod 4 passes through the measuring tube and the outer cylinder, and is connected to the butterfly valve plate, the second connecting rod 5, and the knob 8. The butterfly valve plate is parallel to the second connecting rod 5. The first connecting rod 4 transmits the force that opens and closes the butterfly valve plate. The knob 8 allows the operator to easily turn the first connecting rod 4 to open the butterfly valve plate. The second connecting rod 5 transmits the spring force to close the butterfly valve plate. The second cylinder 2 is a movable structure located outside the first cylinder 1. The limiting groove 71 restricts the second connecting rod 5 and the butterfly valve plate to a vertical position, keeping the spring compressed. The release groove 72 provides rotation space for the second connecting rod 5, allowing the spring to release and close the butterfly valve plate. The spring is connected to the first cylinder 1 and the second connecting rod 5, respectively, and is positioned between the first cylinder 1 and the second cylinder 2. The spring provides the force to close the butterfly valve plate.

[0060] Example 2

[0061] like Figure 4 As shown, based on the above embodiment 1, this embodiment is similar to embodiment 1, except that in this embodiment, multiple first cylinders 1 spliced ​​together can be provided to form a measuring tool of a predetermined length, and a vertical alignment part 10 can be provided on the topmost first cylinder 1.

[0062] The vertical alignment part 10 may include a contact pipe 101, a connecting pipe 102, and a water storage chamber 103; the water storage chamber 103 is enclosed and contains liquid and air bubbles; the contact pipe 101 is connected to the last end of the first cylinder 1; the connecting pipe 102 is disposed between the water storage chamber 103 and the connecting pipe 102; and the connecting pipe 102 is provided with a ventilation groove 104.

[0063] Based on the above structure, the inside of the measuring tool is connected to the atmosphere through the ventilation groove 104, which facilitates sampling and measurement operations. The liquid in the water storage chamber 103 will automatically form bubbles 105. The bubbles 105 can be used to determine whether the measuring tool is in a vertical position, and the measuring tool can be quickly inserted into the sludge to be measured during use.

[0064] As an example, the water storage cavity 103 is made of a transparent material and has a hemispherical structure at the end away from the first cylinder 1.

[0065] Based on the above structure, by setting the water storage chamber 103 to a transparent hemispherical structure, the air bubbles 105 within can be observed intuitively and quickly. Ensure the measuring tube is inserted vertically into the silt to avoid errors in measuring the silt thickness.

[0066] As an example, the first cylinders 1 are connected by threads 106, and the contact tube 101 is connected to the first cylinder 1 by threads 106.

[0067] Based on the above structure, by adopting a threaded 106 splicing structure for the entire device, the overall length can be increased adaptively according to the depth of the silt to be measured, and the device can also be disassembled for easy carrying.

[0068] This solution can simultaneously measure the thickness of silt at the bottom of the pool and collect silt samples. The silt thickness measurement is relatively accurate, the silt samples are well sealed, it can be used in high turbidity pool water conditions and in flowing water conditions, it is easy to carry, simple to operate, can be operated by a single person, and is inexpensive.

[0069] Example 3

[0070] Based on Embodiments 1 and 2 above, this embodiment provides a method for measuring and sampling the thickness of silt at the bottom of a pond; specifically, it includes the following steps:

[0071] Step 1: Preparation. The operator arrives at the target location and assembles the first cylinder 1, the second cylinder 2, and the plumb bob 10. The length of the assembled measuring tool is referenced to the depth of the pool. Turn the knob 8 to move the second connecting rod 5 from the release groove 72 into the limiting groove 71. During this process, the second connecting rod 5 will gradually compress the spring. Since the first connecting rod 4 connects the knob 8, the second connecting rod 5, and the butterfly valve plate, when the second connecting rod 5 is in the limiting groove 71, the butterfly valve plate is also in a vertical position. At this time, pull the second cylinder 2 out a predetermined distance along the limiting groove 71. The preparation is now complete. Due to the effect of the limiting groove 71, the second connecting rod 5, although compressing the spring, cannot rotate.

[0072] Step Two: Measurement and Sampling: The operator vertically inserts the measuring tool into the water tank, constantly observing the bubble 105 in the plumb bob 10 to ensure it remains centered. After the measuring tool touches the bottom of the tank, the operator presses down firmly to completely retract the second cylinder 2, causing the second connecting rod 5 to move from the limiting groove 71 into the release groove 72. When the second connecting rod 5 is in the release groove 72, the spring releases, pushing the second connecting rod 5 to a horizontal position. When the second connecting rod 5 is in the horizontal position, the butterfly valve plate also moves to a horizontal position, at which point the bottom of the first cylinder 1 is closed, sealing the sludge and water in the first cylinder 1.

[0073] Step 3: Sample recovery and reading: The operator lifts the measuring tool out of the pool and observes the position of the pool water and sludge in the transparent first tube. The first cylinder 1 is removed section by section through the thread 106, and the pool water in the first cylinder 1 is drained. The lower layer of the first cylinder 1 containing the sludge at the bottom of the pool is retained. The thickness of the sludge at the bottom of the pool can be determined by reading the scale 9 on the first cylinder 1.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for measuring and sampling the thickness of silt at the bottom of a pond, characterized in that: The system includes a first cylinder and a second cylinder; the second cylinder is fitted over the outside of the first cylinder, and a valve structure is disposed within the first cylinder; a first connecting rod, connected to the valve structure, is disposed through the sidewalls of both the first and second cylinders; the first connecting rod can drive the valve structure to rotate freely within the first cylinder; a second connecting rod and an elastic element are disposed between the first connecting rod and the first cylinder; the elastic element is connected to both the second connecting rod and the first cylinder; a groove structure is disposed on the second cylinder to limit the movement of the first and second connecting rods; the elastic element, when compressed, allows the second connecting rod to be housed within the groove structure, thus relatively fixing the compressed state of the elastic element; the elastic element can be released when the second cylinder and the first cylinder move relative to each other, causing the first connecting rod, the second connecting rod, and the valve structure connected to the elastic element to rotate, thereby closing the end of the first cylinder; the groove structure includes a limiting... The limiting groove and the release groove; the limiting groove is arranged parallel to the central axis of the second cylinder and perpendicular to the opening end of the second cylinder; the release groove is an arc-shaped structure, and one end of the release groove is connected to a predetermined position of the limiting groove; the second connecting rod and the valve structure are arranged in the same vertical plane; the second connecting rod includes a first rod body and a second rod body; the first rod body is perpendicular to the release groove; the second rod body is connected to the first rod body and the first connecting rod; the first rod body is connected to the outer wall of the first cylinder through an elastic element; a knob is provided on the end of the first connecting rod away from the valve structure; the knob is perpendicular to the first connecting rod; the valve structure is a butterfly valve plate; the shape and structure of the butterfly valve plate are adapted to the cross-sectional structure of the first cylinder; the elastic element is a spring; the arc structure of the release groove is 1 / 4 of a circular structure formed with the distance from the second connecting rod to the first connecting rod as the radius.

2. The device for measuring and sampling the thickness of silt at the bottom of a pond as described in claim 1, characterized in that: A scale is set along the length of the first cylinder; both the first and second cylinders are made of transparent material.

3. The device for measuring and sampling the thickness of silt at the bottom of a pond as described in claim 2, characterized in that: Multiple interconnected first cylinders form a measuring tool of a predetermined length, with a plumb line provided on the topmost first cylinder.

4. The device for measuring and sampling the thickness of silt at the bottom of a pond as described in claim 3, characterized in that: The vertical alignment section includes a contact pipe, a connecting pipe, and a water storage chamber; the water storage chamber is enclosed with liquid and air bubbles; the contact pipe is connected to the topmost first cylinder; the connecting pipe is located between the water storage chamber and the contact pipe; and the connecting pipe has a venting groove.

5. The device for measuring and sampling the thickness of silt at the bottom of a pond as described in claim 4, characterized in that: The water storage cavity is made of transparent material and has a hemispherical structure at the end away from the first cylinder; the first cylinders are connected by threads, and the contact tube is connected to the first cylinder by threads.

6. A method for measuring and sampling the thickness of silt at the bottom of a pond, using the device for measuring and sampling the thickness of silt at the bottom of a pond as described in claim 5, characterized in that: Specifically, it includes the following steps: Step 1: Preparation. The operator arrives at the target position and assembles the first cylinder, the second cylinder, and the vertical alignment part. Turn the knob to move the second connecting rod from the release groove into the limiting groove. During this process, the second connecting rod will gradually compress the spring. When the second connecting rod is in the limiting groove, the butterfly valve plate will also be in a vertical position. At this time, pull the second cylinder out of the limiting groove a predetermined distance. The preparation is now complete. Step Two: Measurement and Sampling: The operator vertically inserts the measuring tool into the water tank, constantly observing the air bubble in the plumb bob to ensure it remains centered. After the measuring tool touches the bottom of the tank, the operator presses down firmly to fully retract the second cylinder, causing the second connecting rod to move from the limiting groove into the release groove. When the second connecting rod is in the release groove, the spring releases, pushing the second connecting rod to a horizontal position. When the second connecting rod is in the horizontal position, the butterfly valve plate also moves to a horizontal position, at which point the bottom of the first cylinder is closed, sealing the sludge and water inside. Step 3: Sample recovery and reading: The operator lifts the measuring tool out of the pool and observes the position of the pool water and sludge in the transparent first cylinder. The first cylinder is removed section by section by thread, and the pool water in the first cylinder is drained. The lower first cylinder containing the sludge at the bottom of the pool is retained. The thickness of the sludge at the bottom of the pool can be determined by reading the scale on the first cylinder.

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