Slurry sampler

Abstract

The utility model relates to the technical field of cast-in-place pile construction, in particular to a slurry sampler. Comprising a cylinder body, a first end cover and a second end cover, a sampling cavity is defined by the cylinder body, the first end cover and the second end cover, a first through hole is formed in the first end cover, a second through hole is formed in the second end cover, a first plug is arranged at the first through hole, a second plug is arranged at the second through hole, and a connecting rod is arranged at the top of the first plug. A first connecting rod is hinged to the bottom of the first plug; a second connecting rod is arranged at the top of the second plug; a supporting rod is arranged in the cylinder, a rotating rod is arranged on the supporting rod, and the two ends of the rotating rod are hinged to the first connecting rod and the second connecting rod respectively. According to the mud sampling device, the connecting rod is driven to move downwards to drive the first plug to open the first through hole, meanwhile, under the action of the first connecting rod, the second connecting rod and the rotating rod, the second plug is synchronously driven to open the second through hole, mud at the bottom of a cast-in-place pile hole enters the sampling cavity from the second through hole, and mud sampling is achieved.

Description

Technical Field

[0001] This utility model relates to the field of cast-in-place pile construction technology, specifically a mud sampler. Background Technology

[0002] The thickness of sediment at the bottom of the bored pile and the quality of the mud cake on the borehole wall are important factors affecting the vertical bearing capacity of a single pile. Maintaining good mud properties at the bottom of the pile hole is the main technical measure to control the thickness of sediment at the bottom of the hole and the quality of the mud cake on the borehole wall. Therefore, the "Technical Specification for Building Pile Foundations" JGJ94-2008 stipulates that before pouring concrete, the specific gravity of the mud within 500mm of the bottom of the hole should be less than 1.25; the sand content should not exceed 8%; and the viscosity should not exceed 28s. Currently, before pouring concrete for bored piles, mud properties are generally measured by sampling from a surface mud pit or circulation tank. However, the mud properties measured from samples taken from surface mud pits or circulation tanks differ significantly from the mud properties at the bottom of the pile hole, making it difficult to accurately reflect the true parameters of the mud at the bottom of the hole before concrete pouring.

[0003] Chinese utility model patent CN209513342U discloses a mud sampling device, including a sampling rod, a sampling bucket, and a lifting mechanism. The sampling rod consists of at least two hollow tubes slidably sleeved together. The sampling bucket is fixed to the lower end of the sampling rod, and the bucket opening is covered with an inclined bucket lid. The lower end of the lifting mechanism is connected to the bucket lid, and the upper end extends from the upper end of the sampling rod to open and close the bucket lid. The mud sampling device provided by this utility model has a simple structure, is easy to operate, has low cost, is easy to manufacture, and can be widely used in situations where mud is sampled from mud holes or mud tanks.

[0004] The aforementioned patent makes it difficult to directly contact the bottom of the grouting pile hole for rapid sampling because the sampling bucket opening is located at the top. In addition, the patent uses the up-and-down movement of the reinforcing bar to drive the opening of the sampling bucket to open or close. However, there is a large amount of mud and sand inside the grouting pile. This mud and sand can easily enter the long slot hole during sampling, making it difficult to open or close the sampling bucket and resulting in low sampling efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a mud sampler that can more conveniently collect mud from cast-in-place piles.

[0006] The technical solution adopted by this utility model to solve its technical problem is a mud sampler, including a cylinder, a first end cap coaxially fixed to the upper end of the cylinder, and a second end cap coaxially fixed to the lower end of the cylinder. The cylinder, the first end cap, and the second end cap form a sampling chamber. A first through hole coaxially provided on the first end cap and communicating with the sampling chamber is provided on the first end cap. A second through hole coaxially provided on the second end cap and communicating with the sampling chamber is provided on the second end cap. A driving mechanism that can simultaneously open or close the first through hole and the second through hole is provided in the sampling chamber. The driving mechanism includes a first plug provided at the first through hole and a second plug provided at the second through hole. A connecting rod is coaxially arranged on the top of the first plug. The connecting rod is disposed in the first through hole and can move up and down relative to the first through hole. A first connecting rod is hinged to the bottom of the first plug. A second connecting rod is disposed on the top of the second plug. A support rod is disposed inside the cylinder. The axis of the support rod intersects and is perpendicular to the axis of the cylinder. A rotating rod is disposed on the support rod and rotates about the axis of the support rod. The axis of the rotating rod intersects and is perpendicular to the axis of the support rod. One end of the rotating rod is hinged to the end of the first connecting rod away from the first plug. The other end of the rotating rod is hinged to the end of the second connecting rod away from the second plug.

[0007] Furthermore, the first plug and the second plug are conical and located in the sampling chamber. The larger diameter end of the first plug is larger than the diameter of the first through hole and is hinged to the first connecting rod. The larger diameter end of the second plug is larger than the diameter of the second through hole and is connected to the second connecting rod.

[0008] Furthermore, an annular guide surface is coaxially provided on the inner surface of the second end cap. The guide surface transitions to the inner surface of the second through hole with an arc. The diameter of the end of the guide surface near the second through hole is smaller than the diameter of the end of the guide surface away from the second through hole.

[0009] Furthermore, an annular guide surface is coaxially provided on the outer surface of the second end cap. The guide surface transitions to the inner surface of the second through hole with an arc. The diameter of the end of the guide surface near the second through hole is smaller than the diameter of the end of the guide surface away from the second through hole.

[0010] Furthermore, the weight of the first plug is greater than the weight of the second plug.

[0011] Furthermore, the cylinder is provided with at least three lifting lugs at intervals along its circumference, and the lifting lugs are fixedly connected to the outer surface of the cylinder.

[0012] Furthermore, a limit block is provided at the top of the connecting rod.

[0013] Furthermore, a connecting ring is provided at the top of the limiting block.

[0014] The beneficial effects of this utility model are as follows: by driving the connecting rod downward, the first plug opens the first through hole. At the same time, under the action of the first connecting rod, the second connecting rod, and the rotating rod, the second plug opens the second through hole. The mud at the bottom of the grouting pile hole enters the sampling chamber through the second through hole. Then, the connecting rod is driven upward, causing the first plug to close the first through hole. At the same time, under the action of the first connecting rod, the second connecting rod, and the rotating rod, the second plug closes the second through hole. The mud is then sealed in the sampling chamber. By continuing to pull the connecting rod, the sampler can be pulled out of the grouting pile to achieve mud sampling. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 yes Figure 1 A sectional view;

[0017] Figure 3 This is a schematic diagram of another state of the present invention;

[0018] Figure 4 yes Figure 3 A sectional view.

[0019] Reference numerals in the attached drawings: 1-Cylinder body; 2-First end cap; 3-Second end cap; 4-Sampling chamber; 5-First through hole; 6-Second through hole; 7-First plug; 8-Second plug; 9-Connecting rod; 10-First connecting rod; 11-Second connecting rod; 12-Support rod; 13-Rotating rod; 14-Guide surface; 15-Flow guiding surface; 16-Lifting lug; 17-Limiting block; 18-Connecting ring. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] like Figures 1-4As shown, this utility model discloses a mud sampler, comprising a cylinder 1, a first end cap 2 coaxially fixed to the upper end of the cylinder 1, and a second end cap 3 coaxially fixed to the lower end of the cylinder 1. The cylinder 1, the first end cap 2, and the second end cap 3 form a sampling chamber 4. A first through hole 5 coaxially disposed on the first end cap 2, communicating with the sampling chamber 4, and a second through hole 6 coaxially disposed on the second end cap 3, communicating with the sampling chamber 4. A driving mechanism is provided in the sampling chamber 4, capable of simultaneously opening or closing the first through hole 5 and the second through hole 6. The driving mechanism includes a first plug 7 disposed at the first through hole 5 and a second plug 8 disposed at the second through hole 6. A first plug 7 is coaxially disposed on the top of the first plug 7. A connecting rod 9 is disposed in the first through hole 5 and can move up and down relative to the first through hole 5. The bottom of the first plug 7 is hinged to a first connecting rod 10, and the top of the second plug 8 is provided with a second connecting rod 11. A support rod 12 is disposed inside the cylinder 1. The axis of the support rod 12 intersects and is perpendicular to the axis of the cylinder 1. A rotating rod 13 is disposed on the support rod 12 and rotates around the axis of the support rod 12. The axis of the rotating rod 13 intersects and is perpendicular to the axis of the support rod 12. One end of the rotating rod 13 is hinged to the end of the first connecting rod 10 away from the first plug 7, and the other end of the rotating rod 13 is hinged to the end of the second connecting rod 11 away from the second plug 8.

[0022] The cylinder 1 is cylindrical, and the first end cap 2 and the second end cap 3 can be flat, semi-circular or conical. The first end cap 2, the second end cap 3 and the cylinder 1 can be integrally formed. If the first end cap 2, the second end cap 3 and the cylinder 1 are all made of steel, they can also be connected by welding. The sampling chamber 4 is used to store the mud after sampling. The first through hole 5 and the second through hole 6 are both connected to the sampling chamber 4. The mud enters the sampling chamber 4 through the second through hole 6, and the air in the sampling chamber 4 is discharged through the first through hole 5. The first plug 7 and the second plug 8 can be sealing plates. The diameter of the first plug 7 is larger than the diameter of the first through hole 5, and the diameter of the second plug 8 is larger than the diameter of the second through hole 6. The connecting rod 9 is located on the top of the first plug 7 and can move up and down relative to the first through hole 5. In this way, the first plug 7 can be driven to open or close the first through hole 5 through the connecting rod 9. The axes of the first connecting rod 10, the second connecting rod 11, and the rotating rod 13 are located in the same plane, and the rotation axis of the first connecting rod 10 about the hinge point, the rotation axis of the second connecting rod 11 about the hinge point, and the rotation axis of the rotating rod 13 are all perpendicular to the axis of the rotating rod 13. The rotating rod 13 and the support rod 12 can be connected by bearings. The two ends of the support rod 12 are fixed to the inner wall of the cylinder 1, or the rotating rod 13 is fixedly connected to the support rod 12, and the two ends of the support rod 12 are connected to the inner wall of the cylinder 1 by bearings. See also Figures 1-4In the initial stage, the first plug 7 blocks the first through hole 5, and the second plug 8 blocks the second through hole 6, keeping the sampling chamber 4 closed. The sampler is then placed in the grouting pile hole until the mud completely submerges it. The driving connecting rod 9 moves downwards, causing the first plug 7 to move downwards and opening the first through hole 5. The first connecting rod 10 drives the end of the rotating rod 13 connected to it to move downwards, while the end of the rotating rod 13 connected to the second connecting rod 11 moves upwards, thereby driving the second connecting rod 11 to move upwards. The second connecting rod 11 then drives the second plug 8 to move upwards, opening the second through hole 6. Once the mud in the sampling chamber 4 has collected a suitable amount of liquid... Position, drive connecting rod 9 to move upward, first plug 7 to move upward until the first through hole 5 is closed, first connecting rod 10 drives the end of rotating rod 13 connected to it to move upward, rotating rod 13 to the end connected to second connecting rod 11 to move downward, thereby driving second connecting rod 11 to move downward, second connecting rod 11 to drive second plug 8 to move downward, closing the second through hole 6, at this time the mud can be sealed in sampling chamber 4; then pull the sampler upward to pull out the grouting pile hole. It should be noted that when the sampler is pulled upward, connecting rod 9 is continuously subjected to upward pulling force to ensure that first plug 7 continues to block the first through hole 5.

[0023] If the first plug 7 and the second plug 8 are sealing plates, tilting of the sealing plates may lead to incomplete sealing of the sampling chamber 4. Further, see... Figure 2 and Figure 4 The first plug 7 and the second plug 8 are conical and located in the sampling chamber 4. The larger diameter end of the first plug 7 is larger than the diameter of the first through hole 5 and is hinged to the first connecting rod 10. The larger diameter end of the second plug 8 is larger than the diameter of the second through hole 6 and is connected to the second connecting rod 11.

[0024] To facilitate the sliding of the second plug 8 into the second through hole 6, further refer to... Figure 2 and Figure 4 The inner surface of the second end cap 3 is coaxially provided with an annular guide surface 14. The guide surface 14 transitions to the inner surface of the second through hole 6 with an arc. The diameter of the end of the guide surface 14 near the second through hole 6 is smaller than the diameter of the end of the guide surface 14 away from the second through hole 6. With this configuration, when the second plug 8 contacts the guide surface 14, the guide surface 14 can drive the second plug 8 to slide towards the second through hole 6, making it easier to slide the second plug 8 into the second through hole 6 and block the second through hole 6.

[0025] To facilitate the entry of mud into sampling chamber 4, further details can be found in [link to document]. Figure 2 and Figure 4The outer surface of the second end cap 3 is coaxially provided with an annular flow guide surface 15. The flow guide surface 15 is circularly transitioned to the inner surface of the second through hole 6. The diameter of the end of the flow guide surface 15 near the second through hole 6 is smaller than the diameter of the end of the guide surface 14 away from the second through hole 6.

[0026] Furthermore, the weight of the first plug 7 is greater than the weight of the second plug 8. With this configuration, when the sampler is placed inside the grouting pile hole, gravity can be used to drive the first plug 7 to open the first through hole 5, and at the same time drive the second plug 8 to open the second through hole 6.

[0027] For easier placement of the sampler in the bored pile borehole, see further... Figure 1 and Figure 3 The cylinder 1 is provided with at least three lifting lugs 16 spaced apart along its circumference, and the lifting lugs 16 are fixedly connected to the outer surface of the cylinder 1. The lifting lugs 16 and the cylinder 1 can be connected by bolts, or if both the lifting lugs 16 and the cylinder 1 are made of steel, they can also be connected by welding.

[0028] To prevent the tip of connecting rod 9 from entering sampling chamber 4 when it moves downwards, further see... Figure 2 and Figure 4 A limit block 17 is provided at the top of the connecting rod 9.

[0029] Since the bored pile hole has a certain depth, further see... Figure 2 and Figure 4 The top of the limiting block 17 is provided with a connecting ring 18. The connecting ring 18 is used to connect the cable. When the sampler is moved upward, the cable continuously provides tension, causing the connecting rod 9 to drive the first plug 7 to block the first through hole 5. At the same time, the second plug 8 will also continuously block the second through hole 6.

[0030] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A mud sampler, comprising a cylinder (1), a first end cap (2) coaxially fixed to the upper end of the cylinder (1), and a second end cap (3) coaxially fixed to the lower end of the cylinder (1), wherein the cylinder (1), the first end cap (2), and the second end cap (3) form a sampling cavity (4), wherein the first end cap (2) is coaxially provided with a first through hole (5) communicating with the sampling cavity (4), and the second end cap (3) is coaxially provided with a second through hole (6) communicating with the sampling cavity (4), characterized in that: The sampling chamber (4) is equipped with a driving mechanism that can simultaneously open or close the first through hole (5) and the second through hole (6). The driving mechanism includes a first plug (7) located at the first through hole (5) and a second plug (8) located at the second through hole (6). A connecting rod (9) is coaxially arranged on the top of the first plug (7). The connecting rod (9) is located in the first through hole (5) and can move up and down relative to the first through hole (5). A first connecting rod (10) is hinged to the bottom of the first plug (7). A second connecting rod (10) is arranged on the top of the second plug (8). Two connecting rods (11); a support rod (12) is provided inside the cylinder (1), the axis of the support rod (12) intersects and is perpendicular to the axis of the cylinder (1), a rotating rod (13) is provided on the support rod (12) to rotate around the axis of the support rod (12), the axis of the rotating rod (13) intersects and is perpendicular to the axis of the support rod (12), one end of the rotating rod (13) is hinged to the end of the first connecting rod (10) away from the first plug (7), and the other end of the rotating rod (13) is hinged to the end of the second connecting rod (11) away from the second plug (8).

2. The mud sampler as described in claim 1, characterized in that: The first plug (7) and the second plug (8) are conical and located in the sampling chamber (4). The larger diameter end of the first plug (7) is larger than the diameter of the first through hole (5) and is hinged to the first connecting rod (10). The larger diameter end of the second plug (8) is larger than the diameter of the second through hole (6) and is connected to the second connecting rod (11).

3. A mud sampler as described in claim 2, characterized in that: The inner surface of the second end cap (3) is coaxially provided with an annular guide surface (14), the guide surface (14) and the inner surface of the second through hole (6) are rounded, and the diameter of the end of the guide surface (14) near the second through hole (6) is smaller than the diameter of the end of the guide surface (14) away from the second through hole (6).

4. A mud sampler as described in claim 3, characterized in that: The outer surface of the second end cap (3) is coaxially provided with an annular guide surface (15), the guide surface (15) and the inner surface of the second through hole (6) are rounded, and the diameter of the end of the guide surface (15) near the second through hole (6) is smaller than the diameter of the end of the guide surface (14) away from the second through hole (6).

5. A mud sampler as described in claim 1, characterized in that: The weight of the first plug (7) is greater than the weight of the second plug (8).

6. A mud sampler as described in claim 1, characterized in that: The cylinder (1) is provided with at least 3 lifting lugs (16) spaced apart along its circumference, and the lifting lugs (16) are fixedly connected to the outer surface of the cylinder (1).

7. A mud sampler as described in claim 1, characterized in that: A limit block (17) is provided at the top of the connecting rod (9).

8. A mud sampler as described in claim 7, characterized in that: The top of the limiting block (17) is provided with a connecting ring (18).

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