Mud sampler and mud sampling method

Abstract

The invention relates to the technical field of mud samplers, and discloses a mud sampler and a mud sampling method.The mud sampler comprises a first hopper and a second hopper, the first hopper and the second hopper are hinged to each other, containing cavities are formed in the first hopper and the second hopper, and a second mounting groove is formed in the outer surface of the side, close to the second hopper, of the bottom end of the first hopper; a first toothed bar reciprocates along the central axis of a second mounting groove relative to a second toothed bar, so that aquatic plants between a first bucket and a second bucket can be removed when the first bucket and the second bucket need to be closed after a sludge sample is collected, and meanwhile, a rotating rod is driven by a transmission shaft to rotate towards the interior of a first bucket accommodating cavity; therefore, the residual aquatic plants are driven into the containing cavity, closing of the first hopper and the second hopper is prevented from being affected, the containing cavity between the first hopper and the second hopper is sealed, a sludge sample is prevented from flowing out of a gap between the first hopper and the second hopper, and the sludge sample collecting efficiency of the sludge collector is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of mud sampler technology for aquatic ecology, and more particularly to a mud sampler and mud sampler method. Background Technology

[0002] With the advancement of urbanization, pollution problems in rivers, lakes, and other water bodies have gradually emerged. As a crucial component of aquatic ecosystems, sediment not only serves as a sink for various pollutants—accumulating heavy metals, organic pollutants, and nutrients over time—but can also become a source when water conditions change, releasing pollutants into overlying water bodies and causing secondary pollution. Therefore, sediment remediation has become a key aspect of aquatic ecosystem protection and restoration, and accurately obtaining representative sediment samples is essential for conducting pollution assessments, remediation designs, and effectiveness verification.

[0003] Existing bucket-type sludge samplers collect sludge by opening and closing two buckets. However, because the sludge contains the roots, stems, and decaying leaves of aquatic plants, when the two buckets are about to close to collect the sludge, the roots, stems, and decaying leaves of the aquatic plants prevent the two buckets from closing properly, leaving large gaps. When the sludge is inside the buckets, it will flow out from the gaps because the buckets are not completely closed. This results in the sludge sampler not collecting the required amount of sludge, requiring multiple collections and greatly reducing the efficiency of sludge sample collection. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology by proposing a mud sampler and a mud sampling method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The mud sampler includes: The first bucket and the second bucket are hinged together. Both the first bucket and the second bucket have a receiving cavity inside. The outer surface of the bottom end of the first bucket near the second bucket has a second mounting groove. The inner wall of the bottom end of the first bucket near the second bucket has a first mounting groove. The outer surface of the bottom end of the second bucket near the first bucket has a third mounting groove. The first toothed rod is disposed inside the second mounting groove. The first toothed rod is configured to move along the central axis of the second mounting groove when the second bucket rotates relative to the first bucket. The second toothed rod is fixedly installed inside the third mounting groove, and the second toothed rod is positioned above the first toothed rod; A drive shaft is rotatably mounted between the inner walls of the first mounting groove. A rotating rod is fixedly mounted on the outer circumference of the drive shaft. The drive shaft is configured to drive the drive shaft to rotate when the second bucket rotates relative to the first bucket.

[0006] As a further embodiment of the present invention, a first fixing rod is fixedly installed at the top of the first bucket, and a first connecting rod is rotatably installed between the first fixing rod and the inner wall near the top. A second fixing rod is fixedly installed at the top of the second bucket, and a second connecting rod is rotatably installed between the second fixing rod and the inner wall near the top. The adjacent ends of the first connecting rod and the second connecting rod are hinged to each other.

[0007] As a further embodiment of the present invention, the upper surface of the first bucket is provided with multiple notches, and a rotating shaft is rotatably installed between the inner walls of the multiple notches. The second bucket is fixedly installed on the outer surface of the rotating shaft, and a turntable is fixedly installed at one end of the rotating shaft through the outer surface of the first bucket. The outer surface of the turntable is provided with a wave guide groove.

[0008] As a further embodiment of the present invention, a plurality of limiting blocks are fixedly installed on the outer surface of the first bucket near the turntable. Each of the plurality of limiting blocks has a limiting square hole on its outer surface. A square driving rod is slidably inserted between the inner walls of the limiting square holes. A guide post is fixedly installed on the outer surface of the square driving rod near its top end. The guide post is slidably installed with the inner wall of the wave guide groove. A protective cover is fixedly installed on the outer surface of the first bucket, and the square driving rod is disposed inside the protective cover.

[0009] As a further embodiment of the present invention, an oblique guide groove is provided on the outer surface of the bottom end of the square drive rod, a limit sleeve is fixedly installed in the second mounting groove near the inner wall of the square drive rod, a square slide rod is fixedly installed at one end of the first toothed rod, the square slide rod is slidably inserted between the inner walls of the limit sleeve, a guide rod is fixedly installed at one end of the square slide rod, and the guide rod is slidably installed with the inner wall of the oblique guide groove.

[0010] As a further embodiment of the present invention, a settling groove is formed on the outer surface of the first bucket near the second bucket, and a gear is fixedly installed through one end of the transmission shaft through the settling groove. A cover plate is fixedly installed between the inner walls of the settling groove, and a square top block is slidably inserted into the outer surface of the cover plate. A first rack is fixedly installed on the lower surface of the square top block near one end of the settling groove. The first rack meshes with the gear and is positioned above the gear.

[0011] As a further embodiment of the present invention, a spring is fixedly installed at one end of the square top block near the settling trough, the other end of the spring is fixedly connected to the inner wall of the settling trough, and the other end of the square top block passes through the cover plate and abuts against the outer surface of the second hopper.

[0012] As a further embodiment of the present invention, the first bucket has a flow channel inside, the top end of the flow channel is connected to the receiving cavity of the first bucket, the first bucket has a slot inside, a sliding plate is slidably inserted between the inner walls of the slot, one end of the sliding plate penetrates the inner wall of the sink and a second rack is fixedly installed on its upper surface, and the second rack meshes with a gear.

[0013] As a further embodiment of the present invention, a through hole is provided on the upper surface of the other end of the slide plate, and the through hole is connected to the flow channel.

[0014] The mud sampling method using a mud sampler includes the following steps: S1: Through the gravity of the first and second buckets themselves, and with the cooperation of the first and second fixed rods, the first and second buckets rotate away from each other to open the receiving cavity. With the cooperation of the first and second connecting rods, the first and second buckets rotate towards each other to close. S2: When the second bucket rotates relative to the first bucket, it can drive the first toothed rod to move back and forth along the central axis of the second mounting groove. Since the second toothed rod is set above the first toothed rod, when the first toothed rod moves back and forth, it will move relative to the second toothed rod. S3: When the second bucket moves close to the first bucket, when it comes into contact with the square top block, it will cause the square top block to retract into the sink. At this time, the first rack drives the rotating rod to rotate into the first bucket's receiving cavity through the gear and the transmission shaft. S4: When the gear rotates, it will drive the slide plate to move closer to the sink. At this time, the through hole is connected to the flow channel.

[0015] This invention, by rotating the second bucket relative to the first bucket, drives the first toothed rod to reciprocate along the central axis of the second mounting groove relative to the second toothed rod. This cuts off the aquatic plants clamped between the first and second bucket supports. Simultaneously, the transmission shaft drives the rotating rod to rotate towards the interior of the first bucket's receiving cavity, thereby moving the remaining aquatic plant segments into the cavity. This prevents any remaining aquatic plant segments from remaining between the first and second buckets. Through this design, when the first and second buckets need to be closed after collecting sludge samples, the aquatic plants between them can be removed, preventing interference with the closure of the first and second buckets. This seals the receiving cavity between them, preventing sludge samples from flowing out of the gaps and ensuring the efficiency of the sludge sampler in collecting sludge samples. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the mud sampler proposed in this invention; Figure 2 This is a front view schematic diagram of the mud sampler proposed in this invention; Figure 3 This is a schematic diagram of the first bucket of the mud sampler proposed in this invention; Figure 4 This is a schematic diagram of the rotating shaft of the mud sampler proposed in this invention; Figure 5 This is a schematic cross-sectional view of the first bucket of the mud sampler proposed in this invention; Figure 6 This is a schematic diagram of the internal structure of the first bucket of the mud sampler proposed in this invention; Figure 7 This is a schematic diagram of the rotating rod of the mud sampler proposed in this invention; Figure 8 This is a schematic diagram of the first toothed rod of the mud sampler proposed in this invention; Figure 9 for Figure 2 Enlarged view of a portion of point A in the middle; Figure 10 for Figure 4 Enlarged view of a portion of point B in the middle; Figure 11 for Figure 4 Enlarged view of a portion of point C in the middle; Figure 12 for Figure 5 Enlarged view of a portion of point D; Figure 13 This is a schematic diagram of the square top block of the mud sampler proposed in this invention.

[0017] In the picture: 100, First bucket; 110, First fixing rod; 120, First connecting rod; 130, Notch; 140, First mounting slot; 150, Second mounting slot; 160, Flow channel; 170, Protective cover; 180, Settling tank; 200, Second bucket; 210, Second fixing rod; 220, Second connecting rod; 230, Third mounting slot; 300, cover plate; 400, rotating shaft; 500, rotating rod; 600, first toothed rod; 700, second toothed rod; 800, limiting sleeve; 900, square drive rod; 910, guide post; 920, inclined guide groove; 1000, Limiting block; 1100, Turntable; 1110, Wave guide groove; 1200, Square slide bar; 1210, Guide rod; 1300, Drive shaft; 1400, Gear; 1500, Slide plate; 1510, Through hole; 1520, Second rack; 1600, Square top block; 1610, First rack; 1620, Spring. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] In order for the bucket sludge extractor to remove aquatic plants from the riverbed silt when the two buckets are closed, such as Figure 1 and Figure 2 As shown, this invention proposes a mud sampler, comprising: a first bucket 100 and a second bucket 200, a first toothed rod 600, a second toothed rod 700, and a drive shaft 1300. Specifically, as... Figure 1 As described, the first bucket 100 and the second bucket 200 are hinged to each other, allowing the first bucket 100 and the second bucket 200 to rotate away from or towards each other using the hinged fulcrum, and as... Figure 3 As shown, both the first hopper 100 and the second hopper 200 have internal cavities for holding the collected sludge samples. In this embodiment, as... Figure 4 and Figure 6 As shown, a second mounting groove 150 is provided on the outer surface of the bottom end of the first bucket 100 near the second bucket 200, as... Figure 2 and Figure 9 As shown, a third mounting groove 230 is provided on the outer surface of the bottom end of the second bucket 200 near the first bucket 100. The first toothed rod 600 is disposed inside the second mounting groove 150, and the second toothed rod 700 is fixedly installed inside the third mounting groove 230. The first toothed rod 600 is configured such that when the second bucket 200 rotates relative to the first bucket 100, it can drive the first toothed rod 600 to reciprocate along the central axis of the second mounting groove 150. Since the second toothed rod 700 is disposed above the first toothed rod 600, it will move relative to the second toothed rod 700 when the first toothed rod 600 reciprocates. Since the adjacent surfaces of the first toothed rod 600 and the second toothed rod 700 are provided with serrations, the first toothed rod 600 can cut off the aquatic plants clamped between the first bucket 100 and the second bucket 200 when it moves relative to the second toothed rod 700. This configuration allows the aquatic plants to be cut off when the first bucket 100 and the second bucket 200 approach and rotate together. Because after the aquatic plant is cut, a section will remain above the first toothed rod 600 and the second toothed rod 700. This section will affect the tightness of the final closure of the first hopper 100 and the second hopper 200. Therefore, as Figure 5 and Figure 6 As shown, a first mounting groove 140 is formed on the inner wall of the bottom end of the first bucket 100 near the second bucket 200. A drive shaft 1300 is rotatably mounted between the inner walls of the first mounting groove 140. A rotating rod 500 is fixedly mounted on the outer circumference of the drive shaft 1300. The drive shaft 1300 is configured such that when the second bucket 200 rotates relative to the first bucket 100, it can drive the drive shaft 1300 to rotate. Figure 7As shown, the rotating rod 500 has multiple toothed openings on its outer surface. When the aquatic plant is cut, the remaining part will be caught in the toothed openings of the rotating rod 500. At this time, before the second bucket 200 is fully closed relative to the first bucket 100, the rotating rod 500 is driven to rotate towards the inside of the first bucket 100's receiving cavity through the transmission shaft 1300, thereby moving the remaining aquatic plant into the receiving cavity. This prevents the remaining aquatic plant from remaining between the first bucket 100 and the second bucket 200. Through the above arrangement, when the first bucket 100 and the second bucket 200 need to be closed after collecting the sludge sample, the aquatic plant between them can be removed, avoiding affecting the closure of the first bucket 100 and the second bucket 200, thus sealing the receiving cavity between them and preventing the sludge sample from flowing out from the gap between them, ensuring the efficiency of the mud sampler in collecting sludge samples.

[0020] In this embodiment, in order to enable the first bucket 100 and the second bucket 200 to open and close, such as Figure 1 and Figure 2 As shown, a first fixing rod 110 is fixedly installed at the top of the first bucket 100, and a first connecting rod 120 is rotatably installed between the inner walls of the first fixing rod 110 and the top. A second fixing rod 210 is fixedly installed at the top of the second bucket 200, and a second connecting rod 220 is rotatably installed between the inner walls of the second fixing rod 210 and the top. The adjacent ends of the first connecting rod 120 and the second connecting rod 220 are hinged to each other, and the included angles between the first fixing rod 110, the second fixing rod 210, the first connecting rod 120, and the second connecting rod 220 are as follows. Figure 2 As shown, in use, two first steel cables are connected to the tops of the first fixed rod 110 and the second fixed rod 210 respectively, and then the second steel cable is connected to the bottom of the second connecting rod 220. When the crane releases the first bucket 100 and the second bucket 200 into the water to the specified depth through the two first steel cables, the weight of the first bucket 100 and the second bucket 200, in cooperation with the first fixed rod 110 and the second fixed rod 210, causes the first bucket 100 and the second bucket 200 to rotate away from each other and open the receiving cavity. After sampling is completed, by releasing the two first steel cables and simultaneously tightening the second steel cable, in cooperation with the first connecting rod 120 and the second connecting rod 220, the first bucket 100 and the second bucket 200 are brought closer to each other and rotated to close, thereby completing the silt sampling.

[0021] In order to drive the first rack 600 to reciprocate along the central axis of the second mounting groove 150, such as Figure 3 , Figure 4 and Figure 5As shown, the upper surface of the first bucket 100 has multiple notches 130, and a rotating shaft 400 is rotatably mounted between the inner walls of each of the multiple notches 130. The second bucket 200 is fixedly mounted on the outer surface of the rotating shaft 400, and a turntable 1100 is fixedly mounted on one end of the rotating shaft 400 through the outer surface of the first bucket 100. Figure 10 As shown, the outer surface of the turntable 1100 is provided with a wave guide groove 1110. Multiple limiting blocks 1000 are fixedly installed on the outer surface of the first bucket 100 near the turntable 1100. Each of the multiple limiting blocks 1000 has a limiting square hole on its outer surface. A square drive rod 900 is slidably inserted between the inner walls of the limiting square holes. A guide post 910 is fixedly installed on the outer surface of the square drive rod 900 near its top. The guide post 910 is slidably installed against the inner wall of the wave guide groove 1110. The outer surface of the first bucket 100 is fixedly... A protective cover 170 is installed, and the square drive rod 900 is disposed inside the protective cover 170. The protective cover 170 protects the square drive rod 900. When the first bucket 100 and the second bucket 200 approach and close to each other, the second bucket 200 will rotate relative to the first bucket 100 with the central axis of the rotating shaft 400 as the rotation center. At this time, the second bucket 200 drives the turntable 1100 to rotate through the rotating shaft 400. With the cooperation of the guide post 910 and the wave guide groove 1110, the turntable 1100 drives the square drive rod 900 to move up and down along its central axis.

[0022] And because, as Figure 5 and Figure 11 As shown, the outer surface of the bottom end of the square drive rod 900 is provided with an inclined guide groove 920. The second mounting groove 150 is fixedly installed with a limiting sleeve 800 near the inner wall of the square drive rod 900. A square slide rod 1200 is fixedly installed at one end of the first toothed rod 600. The square slide rod 1200 is slidably inserted between the inner walls of the limiting sleeve 800. A guide rod 1210 is fixedly installed at one end of the square slide rod 1200. The guide rod 1210 is slidably installed with the inner wall of the inclined guide groove 920. When the square drive rod 900 moves up and down along its central axis, the cooperation between the guide rod 1210 and the inclined guide groove 920 drives the square slide rod 1200 to move back and forth along the central axis of the second mounting groove 150, thereby driving the first toothed rod 600 to move back and forth along the central axis of the second mounting groove 150.

[0023] In order for the first bucket 100 and the second bucket 200 to approach and close together, the drive shaft 1300 can drive the rotating rod 500 to rotate towards the inside of the first bucket 100's receiving cavity, such as... Figure 5 and Figure 12As shown in Figure 13, a settling groove 180 is formed on the outer surface of the first bucket 100 near the second bucket 200. One end of the drive shaft 1300 passes through the settling groove 180 and a gear 1400 is fixedly installed thereon. A cover plate 300 is fixedly installed between the inner walls of the settling groove 180. A square top block 1600 is slidably inserted into the outer surface of the cover plate 300. As shown in Figure 13, a first rack 1610 is fixedly installed on the lower surface of the square top block 1600 near the end of the settling groove 180. The first rack 1610 meshes with the gear 1400 and is positioned above the gear 1400. A spring 1620 is fixedly installed on the square top block 1600 near the end of the settling groove 180. The other end of the spring 1620 is attached to the inner wall of the settling groove 180. The square top block 1600 is fixedly connected, with the other end penetrating the cover plate 300 and abutting against the outer surface of the second hopper 200. When the first hopper 100 and the second hopper 200 are separated, the square top block 1600 extends out of the cover plate 300 via the spring 1620. It should be noted that the outer surface of the cover plate 300 is flush with the outer surface of the first hopper 100. When the second hopper 200 moves close to the first hopper 100, it will cause the square top block 1600 to retract into the sink 180 when it abuts against the square top block 1600. At this time, the first rack 1610 drives the rotating rod 500 to rotate towards the inside of the first hopper 100 cavity via the gear 1400 and the transmission shaft 1300, thereby rolling the remaining section of aquatic plants into the inside of the first hopper 100 cavity.

[0024] Because excess water may exist inside the first container (100) and the second container (200) during sludge sample collection, this water will float on top of the sludge. To remove this water, such as... Figure 5 and Figure 12 As shown, the first bucket 100 has a flow channel 160 inside, the top of which is connected to the receiving cavity of the first bucket 100. The first bucket 100 also has a slot inside, and a sliding plate 1500 is slidably inserted between the inner walls of the slot. One end of the sliding plate 1500 penetrates the inner wall of the sink 180, and a second rack 1520 is fixedly mounted on its upper surface. The second rack 1520 meshes with a gear 1400. A through hole 1 is formed on the upper surface of the other end of the sliding plate 1500. 510, the through hole 1510 is connected to the flow channel 160. When the gear 1400 rotates, it will drive the slide plate 1500 to move closer to the settling tank 180. At this time, the through hole 1510 is connected to the flow channel 160, which will drain the excess water above the receiving cavity. When the first bucket 100 and the second bucket 200 are closed, if a large foreign object is trapped, the through hole 1510 and the flow channel 160 will not be able to connect. At this time, no water will be drained, which can be seen by the operator and is used to remind the operator.

[0025] In this embodiment, the square drive rod 900, square slide rod 1200 and square top block 1600 are made into square shapes to prevent them from rotating.

[0026] The mud sampling method using a mud sampler includes the following steps: S1: Through the gravity of the first bucket 100 and the second bucket 200 themselves, and with the cooperation of the first fixed rod 110 and the second fixed rod 210, the first bucket 100 and the second bucket 200 are moved away from each other and rotate to open the receiving cavity. With the cooperation of the first connecting rod 120 and the second connecting rod 220, the first bucket 100 and the second bucket 200 are moved closer to each other and rotate to close. S2: When the second bucket 200 rotates relative to the first bucket 100, it can drive the first toothed rod 600 to move back and forth along the central axis of the second mounting groove 150. Since the second toothed rod 700 is located above the first toothed rod 600, when the first toothed rod 600 moves back and forth, it will move relative to the second toothed rod 700. S3: When the second bucket 200 moves close to the first bucket 100, when it comes into contact with the square top block 1600, it will cause the square top block 1600 to retract into the sink 180. At this time, the first rack 1610 drives the rotating rod 500 to rotate towards the cavity of the first bucket 100 through the gear 1400 and the transmission shaft 1300. S4: When gear 1400 rotates, it will drive slide plate 1500 to move closer to sink 180. At this time, through hole 1510 is connected to flow channel 160.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A mud sampler, characterized in that, include: The first bucket (100) and the second bucket (200) are hinged together. Both the first bucket (100) and the second bucket (200) have a receiving cavity inside. The outer surface of the bottom end of the first bucket (100) near the second bucket (200) is provided with a second mounting groove (150). The inner wall of the bottom end of the first bucket (100) near the second bucket (200) is provided with a first mounting groove (140). The outer surface of the bottom end of the second bucket (200) near the first bucket (100) is provided with a third mounting groove (230). The first rack (600) is disposed inside the second mounting groove (150). The first rack (600) is configured to move along the central axis of the second mounting groove (150) when the second bucket (200) rotates relative to the first bucket (100). The second toothed rod (700) is fixedly installed inside the third mounting groove (230), and the second toothed rod (700) is positioned above the first toothed rod (600); A drive shaft (1300) is rotatably mounted between the inner walls of the first mounting groove (140). A rotating rod (500) is fixedly mounted on the outer circumference of the drive shaft (1300). The drive shaft (1300) is configured to drive the drive shaft (1300) to rotate when the second bucket (200) rotates relative to the first bucket (100).

2. The mud sampler according to claim 1, characterized in that, A first fixing rod (110) is fixedly installed at the top of the first bucket (100), and a first connecting rod (120) is rotatably installed between the first fixing rod (110) and the inner wall near the top. A second fixing rod (210) is fixedly installed at the top of the second bucket (200), and a second connecting rod (220) is rotatably installed between the second fixing rod (210) and the inner wall near the top. The adjacent ends of the first connecting rod (120) and the second connecting rod (220) are hinged to each other.

3. The mud sampler according to claim 1, characterized in that, The upper surface of the first bucket (100) is provided with multiple notches (130), and a rotating shaft (400) is rotatably installed between the inner walls of the multiple notches (130). The second bucket (200) is fixedly installed on the outer surface of the rotating shaft (400). One end of the rotating shaft (400) passes through the outer surface of the first bucket (100) and a turntable (1100) is fixedly installed thereon. The outer surface of the turntable (1100) is provided with a wave guide groove (1110).

4. The mud sampler according to claim 3, characterized in that, Multiple limiting blocks (1000) are fixedly installed on the outer surface of the first bucket (100) near the turntable (1100). Each of the multiple limiting blocks (1000) has a limiting square hole on its outer surface. A square drive rod (900) is slidably inserted between the inner walls of the limiting square holes. A guide post (910) is fixedly installed on the outer surface of the square drive rod (900) near its top. The guide post (910) is slidably installed on the inner wall of the wave guide groove (1110). A protective cover (170) is fixedly installed on the outer surface of the first bucket (100). The square drive rod (900) is located inside the protective cover (170).

5. The mud sampler according to claim 4, characterized in that, An inclined guide groove (920) is provided on the outer surface of the bottom end of the square drive rod (900). A limit sleeve (800) is fixedly installed in the second mounting groove (150) near the inner wall of the square drive rod (900). A square slide rod (1200) is fixedly installed at one end of the first toothed rod (600). The square slide rod (1200) is slidably inserted between the inner wall of the limit sleeve (800). A guide rod (1210) is fixedly installed at one end of the square slide rod (1200). The guide rod (1210) is slidably installed with the inner wall of the inclined guide groove (920).

6. The mud sampler according to claim 1, characterized in that, A sinker (180) is provided on the outer surface of the first bucket (100) near the second bucket (200). One end of the drive shaft (1300) passes through the sinker (180) and a gear (1400) is fixedly installed thereon. A cover plate (300) is fixedly installed between the inner walls of the sinker (180). A square top block (1600) is slidably inserted on the outer surface of the cover plate (300). A first rack (1610) is fixedly installed on the lower surface of the square top block (1600) near the sinker (180). The first rack (1610) meshes with the gear (1400) and is positioned above the gear (1400).

7. The mud sampler according to claim 6, characterized in that, A spring (1620) is fixedly installed at one end of the square top block (1600) near the settling trough (180). The other end of the spring (1620) is fixedly connected to the inner wall of the settling trough (180). The other end of the square top block (1600) passes through the cover plate (300) and abuts against the outer surface of the second bucket (200).

8. The mud sampler according to claim 6, characterized in that, The first bucket (100) has a flow channel (160) inside, the top of the flow channel (160) is connected to the receiving cavity of the first bucket (100), the first bucket (100) has a slot inside, and a sliding plate (1500) is slidably inserted between the inner walls of the slot. One end of the sliding plate (1500) penetrates the inner wall of the sink (180) and a second rack (1520) is fixedly installed on its upper surface. The second rack (1520) meshes with a gear (1400).

9. The mud sampler according to claim 8, characterized in that, A through hole (1510) is provided on the upper surface of the other end of the slide plate (1500), and the through hole (1510) is connected to the flow channel (160).

10. A mud-collecting method using a mud sampler, characterized in that, The mud sampler according to any one of claims 1-9 comprises the following steps: S1: Through the gravity of the first bucket (100) and the second bucket (200), and with the cooperation of the first fixed rod (110) and the second fixed rod (210), the first bucket (100) and the second bucket (200) rotate away from each other to open the receiving cavity. With the cooperation of the first connecting rod (120) and the second connecting rod (220), the first bucket (100) and the second bucket (200) rotate closer to each other to close. S2: When the second bucket (200) rotates relative to the first bucket (100), it can drive the first rack (600) to move back and forth along the central axis of the second mounting groove (150). Since the second rack (700) is located above the first rack (600), when the first rack (600) moves back and forth, it will move relative to the second rack (700). S3: When the second bucket (200) moves close to the first bucket (100), when it comes into contact with the square top block (1600), it will cause the square top block (1600) to retract into the sink (180). At this time, the first rack (1610) drives the rotating rod (500) to rotate towards the cavity of the first bucket (100) through the gear (1400) and the transmission shaft (1300). S4: When the gear (1400) rotates, it will drive the slide plate (1500) to move closer to the sink (180). At this time, the through hole (1510) is connected to the flow channel (160).

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