Flexible sealing soil sediment and bottom mud sampler

Abstract

The utility model relates to a flexible sealing soil sediment and bottom mud sampler, which belongs to the technical field of soil sampling and comprises an outer cylinder and a piston device, the piston device comprises a connecting rod and a piston push plate, the top end of the outer cylinder is covered with a cover plate, an inner cylinder is sleeved in the outer cylinder, and a sampling cylinder is sleeved in the inner cylinder. The piston push plate is hermetically and slidably arranged in the sampling cylinder, the top end of the connecting rod slides the cover plate, and a plurality of vent holes are formed in the cover plate; a sealing device is arranged in the outer cylinder, the sealing device comprises a flexible sealing gasket and two guide rails which are symmetrically arranged, the flexible sealing gasket is arranged between the outer cylinder and the inner cylinder in a sliding mode, and connecting rings are fixedly installed on the two side faces of the flexible sealing gasket; pull ropes are fixed to the two ends of the flexible sealing gasket, the pull ropes at the two ends of the flexible sealing gasket slidably penetrate through the cover plate, and each pull rope is provided with a plurality of connecting rings at intervals in the length direction; and each connecting ring is sleeved with the guide rail in a sliding manner. The utility model has the advantages of small sample introduction resistance, convenience in sample sealing and sample discharging, and small disturbance on the sample.

Description

Technical Field

[0001] The utility model relates to a flexible sealed soil sediment and bottom mud sampler, belonging to the technical field of soil sampling. Background Art

[0002] Since pollutants discharged into water bodies will be transferred and deposited in soil sediments and bottom mud, in order to find out the types, contents and distribution of pollutants in soil sediments and bottom mud, it is necessary to collect samples for analysis and research.

[0003] Most of the existing soil sediment and sediment samplers are not equipped with devices to prevent samples at the bottom of the sampling tube from being carried away by the water flow. Some sampling tubes equipped with relevant devices sometimes affect the removal of samples, and the devices need to be removed before the samples can be removed smoothly, which is cumbersome to operate.

[0004] A self-sealing sediment sampler disclosed in the Chinese utility model patent with publication number CN209656346U realizes sealing by rotating the blocking part to prevent the sediment from leaking out. Although the device can guide the sediment into the sampling tube and realize self-sealing, the blocking part is located in the channel for sediment sampling, which increases the sampling resistance and is not conducive to the smooth sampling of the sediment. The operator needs to use more force to operate the sampler, which increases the difficulty of operation; and due to the existence of the blocking part, the sediment is divided and squeezed by the blocking part during the sampling process. This process causes disturbance to the sampling of the sediment, which is not conducive to maintaining the original properties of the sample and affects the accuracy of sampling. At the same time, when taking out the sediment from the sampling tube, the device hinders the sampling of the sediment, and the blocking module needs to be removed, which is very inconvenient. Utility Model Content

[0005] In order to overcome the above-mentioned shortcomings in the prior art, the utility model designs a flexible sealed soil sediment and bottom mud sampler, which has small sampling resistance, convenient sample sealing and sample discharging, and little sample disturbance.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A flexible sealed soil sediment and bottom mud sampler comprises an outer cylinder and a piston device, wherein the piston device comprises a connecting rod and a piston push plate fixed at the end of the connecting rod, a sealing cover at the top end of the outer cylinder is provided with a cover plate, an inner cylinder is sleeved inside the outer cylinder, a sampling cylinder is sleeved inside the inner cylinder, the piston push plate is sealingly and slidably arranged inside the sampling cylinder, the top end of the connecting rod slides through the cover plate, and a plurality of vent holes are arranged on the cover plate; a sealing device is arranged inside the outer cylinder, the sealing device comprises a flexible sealing pad and a guide rail, the guide rail is provided with two and symmetrically arranged on the front and rear sides of the outer wall of the inner cylinder, the flexible sealing pad is slidably arranged between the outer cylinder and the inner cylinder, and a plurality of connecting rings are fixedly installed on both sides of the flexible sealing pad close to the two guide rails; at least one draw rope is fixed at both ends of the flexible sealing pad, and the draw ropes at both ends of the flexible sealing pad extend along the guide rail setting direction and slide through the cover plate setting, and each of the draw ropes is spaced apart along the length setting direction with a plurality of connecting rings; each of the connecting rings is slidably sleeved with the guide rail.

[0008] Furthermore, four pull ropes are provided, and the four pull ropes are evenly arranged at both ends of the flexible sealing pad, and each of the pull ropes is fixedly connected to the second handle after extending out of the cover plate.

[0009] Furthermore, a limit block for preventing the piston push plate from separating from the sampling cylinder is arranged on the rod body of the connecting rod extending out of the cover plate.

[0010] Furthermore, the top end of the connecting rod extending out of the cover plate is fixedly connected with a handle 1.

[0011] Furthermore, the bottom ends of the outer cylinder and the inner cylinder are both in the form of guide cone structures, and the angle between the inclined surface of the guide cone structure and the horizontal plane is α, wherein 30°≤α≤60°.

[0012] Compared with the prior art, the utility model has the following characteristics and beneficial effects:

[0013] 1. The utility model pulls the handle 2 and then pulls the two drawstrings on one side. Under the pulling force of the drawstrings and the restriction of the connecting ring, and under the guidance of the guide cone at the bottom of the inner tube, the flexible sealing pad can smoothly move along the guide rail to the bottom of the sampling tube, seal the sampling port of the sampling tube, prevent sample leakage, and will not squeeze the sample in the sampling tube, thereby improving the sampling accuracy.

[0014] 2. When the utility model takes out samples, it is only necessary to pull the two drawstrings on the other side through the second handle. The flexible sealing pad moves to the side of the inner tube along the guide rail under the tension of the drawstring and the restriction of the connecting ring to release the sealing state. At this time, the piston device can be pushed to make the sample smoothly taken out from the sampling tube without interference, without disassembly and assembly, thereby improving the sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model in a sealed state;

[0016] Figure 2 It is a partial cross-sectional structural schematic diagram of the main view of the utility model;

[0017] Figure 3 It is a side view structural schematic diagram of the utility model in a sealed state;

[0018] Figure 4 It is a partial cross-sectional structural schematic diagram of the main view of the utility model in a non-sealed state;

[0019] Figure 5 It is a side view of the utility model in a non-sealed state;

[0020] Figure 6 It is a top sectional view of the utility model;

[0021] Figure 7 It is a structural schematic diagram of the flexible sealing pad of the utility model;

[0022] Figure 8 It is a structural schematic diagram of the guide cone of the utility model;

[0023] Fig. 9 This is a schematic diagram of the main structure of the guide rail of the utility model;

[0024] Fig.10 It is a side structural schematic diagram of the guide rail of the utility model;

[0025] Fig.11 It is a schematic diagram of the top view of the structure of the cooperation between the guide rail and the inner cylinder of the utility model.

[0026] The figures are marked as follows: 100, piston device; 200, sealing device; 1, outer tube; 2, inner tube; 3, sampling tube; 4, piston push plate; 5, flexible sealing pad; 6, guide rail; 7, connecting ring; 8, pull rope; 9, connecting rod; 10, limit block; 11, handle one; 12, cover plate; 14, handle two. DETAILED DESCRIPTION

[0027] The present invention will be described in more detail below in conjunction with the embodiments.

[0028] See also Figures 1 to 11The flexible sealed soil sediment and bottom mud sampler of this embodiment includes an outer tube 1 and a piston device 100. The piston device 100 includes a connecting rod 9 and a piston push plate 4 fixed to the end of the connecting rod 9. The top sealing cover of the outer tube 1 is provided with a cover plate 12. The inner tube 2 is sleeved inside the outer tube 1. The sampling tube 3 is sleeved inside the inner tube 2. The piston push plate 4 is sealingly slidably arranged inside the sampling tube 3. The top end of the connecting rod 9 slides through the cover plate 12. The cover plate 12 is provided with a plurality of vents. The vents are arranged to facilitate exhaust when the cover plate 12 is pushed in to prevent air pressure from hindering the pushing in of the cover plate 12.

[0029] A sealing device 200 is provided inside the outer cylinder 1, and the sealing device 200 includes a flexible sealing pad 5 and a guide rail 6. Two guide rails 6 are provided and are symmetrically arranged on the front and rear sides of the outer wall of the inner cylinder 2. The flexible sealing pad 5 is slidably arranged between the outer cylinder 1 and the inner cylinder 2, and a plurality of connecting rings 7 are fixedly installed on both sides of the flexible sealing pad 5 close to the two guide rails 6. In this embodiment, the flexible sealing pad 5 has a certain tensile property.

[0030] At least one drawstring 8 is fixed at both ends of the flexible sealing pad 5 , and the drawstrings 8 at both ends of the flexible sealing pad 5 extend along the setting direction of the guide rail 6 and slide through the cover plate 12 , and each drawstring 8 is provided with a plurality of connecting rings 7 at intervals along the length setting direction.

[0031] Specifically, see Figure 4 The pull rope 8 at one end extends upward and passes through the cover plate 12, and the pull rope 8 at the other end extends along the direction of the guide rail 6 and also passes through the cover plate 12. The exit positions of the pull ropes 8 at both ends of the flexible sealing pad 5 are symmetrically arranged.

[0032] Each connecting ring 7 is slidably sleeved with the guide rail 6 , and the guide rail 6 can play a guiding role and assist the flexible sealing pad 5 to adjust the sealing position.

[0033] Furthermore, four pull ropes 8 are provided, and the four pull ropes 8 are evenly arranged at both ends of the flexible sealing pad 5 , and each pull rope 8 is fixedly connected to a second handle 14 after extending out of the cover plate 12 .

[0034] Furthermore, a limiting block 10 is provided on the rod body of the connecting rod 9 extending out of the cover plate 12 for preventing the piston push plate 4 from being separated from the sampling cylinder 3 .

[0035] Furthermore, the top end of the connecting rod 9 extending out of the cover plate 12 is fixedly connected with a handle 11 .

[0036] Furthermore, the bottom ends of the outer cylinder 1 and the inner cylinder 2 are both in the form of a guide cone structure, and the angle between the inclined surface and the horizontal plane of the guide cone structure is α, wherein 30°≤α≤60°. The bottom end of the outer cylinder 1 is in the form of a guide cone structure, which can reduce the resistance to entering the soil and bottom mud, making the sampling process smoother and more labor-saving. The bottom end of the inner cylinder 2 is in the form of a guide cone structure, which can allow the flexible sealing pad 5 to be guided by the guide cone and complete the action of sealing the sampling cylinder 3 more smoothly and labor-savingly under the tension of the pull rope 8.

[0037] The working principle of the utility model is as follows: before sampling, the limit block 10 is brought into contact with the top surface of the cover plate 12, and at this time, the flexible sealing pad 5 is in a non-sealed state.

[0038] During sampling, the piston push plate 4 gradually rises as the sample gradually enters the sampling tube 3 , and the gas in the sampling tube 3 is discharged to the outside through the vent holes on the cover plate 12 as the sample enters.

[0039] When the required amount of sample is collected, the sampling personnel pulls the handle 14 and then pulls the two draw ropes 8 on one side. Under the tension of the draw ropes 8 and the restriction of the connecting ring 7, and under the guidance of the guide cone at the bottom end of the inner tube 2, the flexible sealing pad 5 can smoothly move along the guide rail 6 to the bottom of the sampling tube 3, seal the sample inlet of the sampling tube 3, prevent sample leakage, and will not squeeze the sample in the sampling tube 3.

[0040] The sampler in the sealed state can be moved as a whole to another place for sampling. When sampling, the two drawstrings 8 on the other side can be pulled by the handle 14, and the flexible sealing pad 5 moves along the guide rail 6 to the side of the inner tube 2 under the pulling force of the drawstring 8 and the restriction of the connecting ring 7, and the sealed state is released. At this time, the piston device 100 can be pushed to make the sample be smoothly sampled from the sampling tube 3 without interference.

[0041] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "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 an indirect connection 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.

[0043] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A flexible sealed soil sediment and bottom mud sampler, comprising an outer cylinder (1) and a piston device (100), wherein the piston device (100) comprises a connecting rod (9) and a piston push plate (4) fixed to the end of the connecting rod (9), and a cover plate (12) is provided at the top sealing cover of the outer cylinder (1), characterized in that: The inner tube (2) is sleeved inside the outer tube (1), the inner tube (2) is sleeved inside the sampling tube (3), the piston push plate (4) is sealingly slidably arranged inside the sampling tube (3), the top end of the connecting rod (9) slides through the cover plate (12), and the cover plate (12) is provided with a plurality of vent holes; a sealing device (200) is arranged inside the outer tube (1), the sealing device (200) comprises a flexible sealing pad (5) and a guide rail (6), two of the guide rails (6) are symmetrically arranged on the front and rear sides of the outer wall of the inner tube (2), and the connecting rod (9) is provided with a sealing device (200) and a sealing device (200) is provided on the outer tube (1). The flexible sealing pad (5) is slidably arranged between the outer tube (1) and the inner tube (2), and a plurality of connecting rings (7) are fixedly installed on both sides of the flexible sealing pad (5) close to the two guide rails (6); at least one draw rope (8) is fixed at both ends of the flexible sealing pad (5), and the draw ropes (8) at both ends of the flexible sealing pad (5) extend along the setting direction of the guide rail (6) and slide through the cover plate (12), and each of the draw ropes (8) is spaced apart along the length setting direction; each of the connecting rings (7) is slidably sleeved with the guide rail (6).

2. A flexible sealed soil sediment and bottom mud sampler according to claim 1, characterized in that: Four pull ropes (8) are provided, and the four pull ropes (8) are evenly arranged at both ends of the flexible sealing pad (5). After each pull rope (8) extends out of the cover plate (12), it is fixedly connected to a second handle (14).

3. A flexible sealed soil sediment and bottom mud sampler according to claim 1, characterized in that: A limiting block (10) for preventing the piston push plate (4) from separating from the sampling cylinder (3) is arranged on the rod body of the connecting rod (9) extending out of the cover plate (12).

4. A flexible sealed soil sediment and bottom mud sampler according to claim 1, characterized in that: The top end of the connecting rod (9) extending out of the cover plate (12) is fixedly connected to a handle 1 (11).

5. A flexible sealed soil sediment and bottom mud sampler according to claim 1, characterized in that: The bottom ends of the outer cylinder (1) and the inner cylinder (2) are both in the form of guide cone cylinder structures, and the angle between the inclined surface of the guide cone cylinder structure and the horizontal plane is α, wherein 30°≤α≤60°.

6. A flexible sealed soil sediment and bottom mud sampler according to claim 1, characterized in that: The vertical projection of the guide rail (6) is U-shaped.

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