A sampling device for cofferdam filling granular material

Abstract

The utility model relates to the technical field of sampling devices, and in particular to a sampling device for cofferdam filling granular materials, comprising a sampling assembly, including a fixed half-tube, a docking plate, a movable half-tube and disposable oil paper, both ends of the fixed half-tube are fixedly installed with docking plates, the fixed half-tube and the movable half-tube are combined to form a sampling tube, disposable oil paper is arranged in the sampling tube, a piston is slidably connected to the inner wall of the sampling tube, the two ends of the disposable oil paper are respectively adhered to the docking plate and the bottom of the piston; the docking plate at the bottom end of the fixed half-tube is fixedly installed with a guide tube. The utility model draws in filling granular materials through a piston, and the filling granular materials enter the disposable oil paper, and the disposable oil paper is used to separate the sampled filling granular materials from the sampling tube, so as to avoid the filling granular materials from sticking to the sampling tube after solidification, so as to separate the sampled filling granular materials, and solves the problem that the filling granular materials are solidified and stick to the sampling tube and are difficult to separate.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling devices, in particular to a sampling device for cofferdam filling granular materials. Background Art

[0002] The maintenance cofferdam project downstream of the stilling pool of the hydropower station has a tight schedule and heavy tasks. In addition, the large-size block stones in the core wall materials account for 60%, so it is necessary to select reasonable drilling equipment and ensure the slope of the hole. In addition, due to the large filling particle size and the high groundwater level, which reaches a maximum of 28.1m, there will inevitably be special situations such as overhead, leakage, and dynamic water operations, so special situations need to be handled during the process. In order to understand the grouting quality in a timely manner, it is necessary to select one or several rapid quality inspection methods as mutual verification, sample the cofferdam filling particles in advance, and understand the grouting test results to provide parameter basis for subsequent normal grouting, so as to dynamically adjust the grouting parameters during the process to ensure that the anti-seepage effect of the cofferdam meets the design indicators.

[0003] The existing filling granular material sampling device uses negative pressure to attract the filling granular material by sliding the piston in the sampling tube, and the drainage tube is aligned with the filling granular material, and the filling granular material enters the sampling tube from the drainage tube under the action of negative pressure.

[0004] However, after the filling granular materials are sampled by this sampling device, the filling granular materials remain in the sampling tube for a long time, gradually solidify and adhere to the sampling tube, making it difficult to remove the filling granular materials. Utility Model Content

[0005] The utility model aims to provide a sampling device for cofferdam filling granular materials in view of the problem that the filling granular materials solidify and stick to the sampling tube and are difficult to be taken out in the background technology.

[0006] The technical solution of the utility model is: a cofferdam filling granular material sampling device, comprising:

[0007] The sampling assembly comprises a fixed half-tube, a docking plate, a movable half-tube and disposable oil paper, wherein the docking plates are fixedly mounted at both ends of the fixed half-tube, the fixed half-tube and the movable half-tube are combined to form a sampling tube, the sampling tube is provided with disposable oil paper, the inner wall of the sampling tube is slidably connected with a piston, and the two ends of the disposable oil paper are respectively adhered to the docking plate and the bottom of the piston;

[0008] A flow guide tube is fixedly installed on the docking plate at the bottom end of the fixed half pipe, and the flow guide tube is communicated with the sampling tube. A fixing component is fixedly arranged on the arc surface of the docking plate.

[0009] Optionally, the fixed half-tube and the movable half-tube both adopt a semi-cylindrical structure, and an integrally formed sealing rubber is fixedly connected at the joint between the movable half-tube and the fixed half-tube. A strip groove is opened on the fixed half-tube, and the sealing rubber is clamped in the strip groove.

[0010] Optionally, the disposable oil paper adopts a cylindrical structure, a through hole is opened at the center of the docking plate at the bottom end of the fixed half pipe, the through hole is located on the axis line of the disposable oil paper, and the filling particles enter the disposable oil paper from the through hole.

[0011] Optionally, the curved surface of the piston is slidably connected to the inner arc surface of the fixed half-tube and the inner arc surface of the movable half-tube, and the disposable oil paper is in a contracted state when it is adhered to the piston and the docking plate.

[0012] Optionally, the fixing assembly includes a receiving bin, a positioning plate and a return spring, the side of the receiving bin is fixedly connected to the docking plate, the inner wall of the receiving bin is slidably connected to the positioning plate, the top of the positioning plate is elastically connected to the receiving bin by a return spring, the positioning plate is clamped with the movable half-tube, the positioning plate adopts an arc plate structure, and a slope is provided at the end thereof, and the inner arc surface of the positioning plate has the same curvature as the inner arc surface of the movable half-tube.

[0013] Optionally, an extension rod is fixedly mounted on the top of the positioning plate, the extension rod passes through the storage bin, and a limiting plate is fixedly mounted on the end of the extension rod.

[0014] Optionally, a pull rod is fixedly mounted on the top of the piston, and the pull rod passes through the center of the docking plate.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] The utility model draws in filling granular materials through a piston, and the filling granular materials enter into disposable oil paper, and the sampled filling granular materials are separated from the sampling tube by the disposable oil paper, so as to avoid the filling granular materials sticking to the sampling tube after solidification, so as to separate the sampled filling granular materials, and solves the problem that the filling granular materials are solidified and stick to the sampling tube and are difficult to separate.

[0017] Furthermore, the operator pulls the extension rod to retract the positioning plate into the bin, and by separating the fixed half-tube and the movable half-tube, the sampling tube is fully opened, and the disposable oil paper and filling particles can be taken out, and the sampled filling particles are taken out by peeling off the disposable oil paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of an embodiment of the utility model is given;

[0019] Figure 2 A schematic diagram of a movable half-tube structure in a separated state according to an embodiment of the utility model is given;

[0020] Figure 3 A schematic cross-sectional view of the storage bin structure of an embodiment of the utility model is given;

[0021] Figure 4 A schematic top view and cross-sectional view of a fixed half-pipe structure of an embodiment of the utility model is given.

[0022] Figure numerals: 1. guide tube; 2. sampling assembly; 21. fixed half tube; 22. docking plate; 23. movable half tube; 24. sealing rubber; 25. disposable oil paper; 3. piston; 4. pull rod; 5. fixed assembly; 51. storage bin; 52. positioning plate; 53. reset spring; 54. extension rod; 55. limit plate. DETAILED DESCRIPTION

[0023] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0024] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0025] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] This embodiment provides a cofferdam filling granular material sampling device, such as Figure 1 and 2 As shown, it includes a sampling assembly 2, including a fixed half pipe 21, a docking plate 22, a movable half pipe 23 and a disposable oil paper 25. The docking plates 22 are fixedly installed at both ends of the fixed half pipe 21. The fixed half pipe 21 and the movable half pipe 23 are combined to form a sampling tube. The filling particles sucked by the sampling device are retained in the sampling tube. When the sampled filling particles need to be taken out, the sampling tube can be completely opened by separating the fixed half pipe 21 and the movable half pipe 23 to take out the filling particles.

[0030] like Figure 2 and 4 As shown, both the fixed half pipe 21 and the movable half pipe 23 are semi-cylindrical structures, and an integrally formed sealing rubber 24 is fixedly connected at the joint of the movable half pipe 23 and the fixed half pipe 21. A strip groove is provided on the fixed half pipe 21, and the sealing rubber 24 is engaged with the strip groove. The engagement of the sealing rubber 24 with the strip groove improves the sealing performance of the sampling tube formed by the fixed half pipe 21 and the movable half pipe 23, thereby preventing air leakage from affecting the extraction of filling granular materials.

[0031] like Figure 2 As shown, the inner wall of the sampling tube is slidably connected with a piston 3, and a pull rod 4 is fixedly installed on the top of the piston 3, and the pull rod 4 passes through the center of the docking plate 22. The docking plate 22 at the bottom of the fixed half tube 21 is fixedly installed with a guide tube 1, and the guide tube 1 is connected with the sampling tube. By pulling the pull rod 4, the piston 3 moves upward to generate negative pressure, and the negative pressure is used to generate suction at the guide tube 1, and the filling granular material is sucked by the suction. The filling granular material is not solidified during the suction, and the end of the guide tube 1 is provided with a sharp corner to penetrate into the filling granular material for suction.

[0032] like Figure 2 As shown, a disposable oil paper 25 is arranged in the sampling tube, and the disposable oil paper 25 adopts a cylindrical structure, and the two ends of the disposable oil paper 25 are respectively adhered to the docking plate 22 and the bottom of the piston 3. A through hole is opened at the center of the docking plate 22 at the bottom end of the fixed half pipe 21, and the through hole is located on the axis line of the disposable oil paper 25, and the filling granular material enters the disposable oil paper 25 from the through hole.

[0033] When the piston 3 extracts the filling particles, the filling particles enter from the guide tube 1 and enter the disposable oil paper 25 along the through hole. Since the disposable oil paper 25 separates the filling particles from the sampling tube, the contamination of the sampling tube by the filling particles is reduced, the cleaning position is reduced, and the disposable oil paper 25 is used to contact the filling particles to separate the sampled filling particles.

[0034] In this embodiment, the sampled filling particles are separated from the sampling tube by disposable oil paper 25 to prevent the filling particles from sticking to the sampling tube after solidification, and the fixed half tube 21 and the movable half tube 23 are separated to completely open the sampling tube so as to take out the sampled filling particles, thus solving the problem that the filling particles are solidified and stick to the sampling tube and are difficult to separate.

[0035] Example 2

[0036] Based on Example 1, this example proposes a cofferdam filling granular material sampling device, such as Figure 2 and 3 As shown, a fixing component 5 is fixedly provided on the arc surface of the docking plate 22, and the fixing component 5 includes a receiving bin 51, a positioning plate 52 and a return spring 53. The side of the receiving bin 51 is fixedly connected to the docking plate 22, and the inner wall of the receiving bin 51 is slidably connected to the positioning plate 52. The positioning plate 52 is clamped with the movable half pipe 23. The positioning plate 52 adopts an arc plate structure, and a slope is provided at its end.

[0037] The movable half-tube 23 is fixed in position by the positioning plate 52 so that it cannot move away from the fixed half-tube 21, and the sealing rubber 24 cooperates with the strip groove so that the movable half-tube 23 is fixed on the fixed half-tube 21 and cannot move, thereby limiting the position of the movable half-tube 23 in multiple directions to prevent the movement of the movable half-tube 23 and leakage of the sampling tube.

[0038] like Figure 3 As shown, a return spring 53 is elastically connected between the top of the positioning plate 52 and the storage bin 51. When the movable half-tube 23 is installed, the movable half-tube 23 moves toward the fixed half-tube 21, and the movable half-tube 23 abuts against the inclined surface of the positioning plate 52 to slide the positioning plate 52 toward the inside of the storage bin 51. At this time, the positioning plate 52 compresses the return spring 53. When the movable half-tube 23 is buckled with the fixed half-tube 21, the elastic force of the return spring 53 resets the positioning plate 52 to the outer arc surface of the movable half-tube 23. The inner arc surface of the positioning plate 52 has the same curvature as the inner arc surface of the movable half-tube 23, which improves the stability of the positioning plate 52 fixing the movable half-tube 23.

[0039] like Figure 3 As shown, an extension rod 54 is fixedly installed on the top of the positioning plate 52, and the extension rod 54 passes through the storage bin 51. A limit plate 55 is fixedly installed on the end of the extension rod 54. The limit plate 55 limits the positioning plate 52 to prevent the positioning plate 52 from being separated from the storage bin 51. When disassembling the movable half pipe 23, the positioning plate 52 can be retracted into the storage bin 51 by pulling the extension rod 54, so that the movable half pipe 23 can be separated.

[0040] In this embodiment, during installation, the movable half-tube 23 is pressed against the inclined surface of the positioning plate 52 to make the positioning plate 52 slide into the storage bin 51. When the movable half-tube 23 is engaged with the fixed half-tube 21, the elastic force of the return spring 53 returns the positioning plate 52 to the outer arc surface of the movable half-tube 23, thereby completing the position fixation of the movable half-tube 23. During disassembly, the movable half-tube 23 can be separated by pulling the extension rod 54 to retract the positioning plate 52 into the storage bin 51.

[0041] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A sampling device for cofferdam filling granular material, characterized in that: include: The sampling assembly (2) comprises a fixed half-tube (21), a docking plate (22), a movable half-tube (23) and a disposable oil paper (25), wherein the docking plate (22) is fixedly mounted at both ends of the fixed half-tube (21), the fixed half-tube (21) and the movable half-tube (23) are combined to form a sampling tube, the disposable oil paper (25) is arranged in the sampling tube, the inner wall of the sampling tube is slidably connected to a piston (3), and the two ends of the disposable oil paper (25) are respectively adhered to the docking plate (22) and the bottom of the piston (3); A flow guide tube (1) is fixedly mounted on the docking plate (22) at the bottom end of the fixed half pipe (21), the flow guide tube (1) is connected to the sampling tube, and a fixing component (5) is fixedly arranged on the arc surface of the docking plate (22).

2. A cofferdam filling granular material sampling device according to claim 1, characterized in that: The fixed half pipe (21) and the movable half pipe (23) both adopt a semi-cylindrical structure. The movable half pipe (23) and the fixed half pipe (21) are fixedly connected at the joint with an integrally formed sealing rubber (24). The fixed half pipe (21) is provided with a strip groove, and the sealing rubber (24) is clamped with the strip groove.

3. A cofferdam filling granular material sampling device according to claim 1, characterized in that: The disposable oil paper (25) has a cylindrical structure. A through hole is provided at the center of the docking plate (22) at the bottom end of the fixed half pipe (21). The through hole is located on the axis of the disposable oil paper (25). The filling granular material enters the disposable oil paper (25) through the through hole.

4. A cofferdam filling granular material sampling device according to claim 3, characterized in that: The curved surface of the piston (3) is slidably connected to the inner arc surface of the fixed half tube (21) and the inner arc surface of the movable half tube (23); the disposable oil paper (25) is in a contracted state when it is adhered to the piston (3) and the docking plate (22).

5. A cofferdam filling granular material sampling device according to claim 1, characterized in that: The fixing assembly (5) comprises a receiving bin (51), a positioning plate (52) and a return spring (53); the side of the receiving bin (51) is fixedly connected to the docking plate (22); the inner wall of the receiving bin (51) is slidably connected to the positioning plate (52); and the return spring (53) is elastically connected between the top of the positioning plate (52) and the receiving bin (51).

6. A sampling device for cofferdam filling granular material according to claim 5, characterized in that: The positioning plate (52) is clamped with the movable half pipe (23). The positioning plate (52) adopts an arc plate structure and an inclined surface is provided at the end thereof. The inner arc surface of the positioning plate (52) has the same curvature as the inner arc surface of the movable half pipe (23).

7. A cofferdam filling granular material sampling device according to claim 6, characterized in that: An extension rod (54) is fixedly mounted on the top of the positioning plate (52), the extension rod (54) passes through the storage bin (51), and a limiting plate (55) is fixedly mounted on the end of the extension rod (54).

8. A cofferdam filling granular material sampling device according to claim 1, characterized in that: A pull rod (4) is fixedly mounted on the top of the piston (3), and the pull rod (4) passes through the center of the docking plate (22).

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