Sampling instrument for soil detection

Abstract

The utility model discloses a sampling instrument for soil detection. The sampling instrument comprises a sampling tube and a fixing frame for clamping the sampling tube, the lifting platform is used for placing a sample; the top of the sampling tube is communicated with an air inlet of the air pump through a hose. The sampling device has the advantages that the sampling device is simple in structure and low in cost, the sampling tube does not need to be moved in the sampling process, the sampling tube is prevented from shaking to cause dripping of samples, and the sampling accuracy is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sampling device technical field, especially soil detection sampling appearance. BACKGROUND

[0002] When detecting heavy metals and the like in soil, a solvent needs to be added to the soil to be detected to prepare a soil solution sample, and a sampling device is used to suck a quantitative sample for subsequent detection. Most of the existing soil sample sampling instruments are lifting sampling, and the specific operation process is to first control the sampling instrument and the sampling tube to ascend, place the container containing the sample on the desktop, then control the sampling instrument and the sampling tube to descend until the sampling tube is inserted into the sample. After the sample is sucked into the sampling tube by using the air suction pump connected with the sampling tube, the sampling instrument and the sampling tube are controlled to ascend again to take out the container containing the sample. The problem is that the air suction pump is relatively high in cost, and the sampling tube needs to ascend again after sucking the sample, which inevitably causes the sampling tube to shake, and part of the sample may drip from the mouth of the sampling tube, reducing the sampling amount of the sample and affecting the accuracy of sampling. SUMMARY

[0003] The utility model solves the technical problem to provide a kind of soil detection sampling appearance, simple structure, lower cost, without moving sampling tube in sampling process, avoid the shaking of sampling tube to make sample drip, effectively improve the accuracy of sampling.

[0004] To solve the above technical problems, the technical scheme of the utility model is a kind of soil detection sampling appearance, including sampling tube, the fixed frame for clamping sampling tube;It further includes air suction cylinder and the lifting platform for placing sample;The top of the sampling tube is communicated with the air inlet of the air suction cylinder by hose.

[0005] Further, the upper portion of the sampling tube is provided with a first on-off valve;The upper portion of the sampling tube is communicated with the horizontal branch pipe below the first on-off valve;The horizontal branch pipe is communicated with the longitudinal branch pipe;The connection of the horizontal branch pipe and the longitudinal branch pipe is provided with a second on-off valve.

[0006] Further, the fixed frame includes a mounting plate, two upper and lower fixed plates fixed to the mounting plate, a clamping block fixed to one end of the fixed plate;The clamping block is divided into a fixed clamping block fixed to the fixed plate and a movable clamping block connected to the fixed clamping block by bolts;The opposite side of the fixed clamping block and the movable clamping block is provided with an arc-shaped groove for clamping the sampling tube.

[0007] Further, the fixing frame further comprises a guide plate; the guide plate is internally provided with a sliding cavity; the mounting plate is in sliding connection with the internal cavity of the guide plate; a rack is fixedly connected to the side of the mounting plate away from the fixing plate; a hole for driving the rack to move up and down is formed in the guide plate; the driving assembly comprises two mounting seats fixedly connected to the guide plate; a rotating shaft is rotatably mounted between the two mounting seats; a gear meshing with the rack is mounted on the rotating shaft.

[0008] Further, a protective cover is fixedly connected to the surface of the guide plate; the protective cover covers the outside of the gear; a limiting gap is formed in one side of the protective cover; a limiting block is fixedly connected to the rotating shaft; the rotating shaft can slide along the axial direction; the thickness of the gear is greater than the thickness of the rack.

[0009] Further, the guide plate is fixedly connected to the first screw sleeve through a connecting rod; the first screw sleeve is threadedly mounted on a first screw rod; the lower end of the first screw rod is fixedly connected to the base.

[0010] Further, the connecting rod is a telescopic rod; the telescopic rod is connected through a locking screw.

[0011] Further, the device further comprises a support for mounting the suction cylinder.

[0012] Further, the support comprises a second screw rod, a second screw sleeve threadedly connected to the second screw rod; a fixed connecting arm is fixedly connected to the outer wall of the second screw sleeve; a moving arm is connected to the fixed connecting arm through a bolt; a clamping ring for clamping the suction cylinder is fixedly connected to one end of the fixed connecting arm and the moving arm.

[0013] Further, a scale line is arranged on the sampling pipe.

[0014] The device has the following beneficial effects:

[0015] During sampling, the height of the lifting platform is first controlled to be lowered; then a container containing a sample is placed on the lifting platform and located directly below the sampling pipe; then the lifting platform is controlled to be raised until the lower end of the sampling pipe is inserted into the sample. During sampling, the piston of the suction cylinder is slowly pulled outwards, so that the sample solution is sucked into the sampling pipe under the action of negative pressure until the sample gradually rises to reach a predetermined scale. Then the lifting platform is controlled to be lowered until the container can be taken out. The device has a simple structure and low cost; during sampling, the sampling pipe does not need to be moved, so that the sampling pipe is prevented from shaking and causing the sample to drop, and the precision of sampling is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the embodiment;

[0017] Figure 2 It is Figure 1Cross-sectional view of the middle fixing frame;

[0018] Figure 3 For Figure 1 Cross-sectional view of the middle fixing frame;

[0019] Figure 4 For Figure 1 Right view of the middle partial structure.

[0020] In the figure, 1 - sampling tube, 2 - first on-off valve, 3 - hose, 4 - suction cylinder, 5 - transverse branch pipe, 6 - longitudinal branch pipe, 7 - second on-off valve, 8 - mounting plate, 9 - fixing plate, 10 - rack, 11 - guide plate, 12 - mounting seat, 13 - gear, 14 - protective cover, 15 - clamping block, 16 - bolt, 17 - rotating shaft, 18 - connecting rod, 19 - first screw sleeve, 20 - first screw rod, 21 - base, 22 - second screw rod, 23 - second screw sleeve, 24 - fixed connecting arm, 25 - clamping ring, 26 - lifting platform, 27 - limiting block, 28 - limiting gap, 29 - moving arm. DETAILED DESCRIPTION

[0021] The specific embodiments of the present application will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0022] Embodiment

[0023] A soil detection sampling instrument, as shown in Figures 1-4 It comprises a sampling tube 1, a fixing frame for clamping the sampling tube 1, a suction cylinder 4 and a lifting platform 26 for placing samples. The top of the sampling tube 1 is communicated with the air inlet of the suction cylinder 4 through a hose 3. The structure of the lifting platform 26 is a prior art, and the person skilled in the art can select a suitable model according to the needs.

[0024] During sampling, the height of the lifting platform 26 is first controlled to be lowered, then a container containing samples is placed on the lifting platform 26 and the container is located directly below the sampling tube 1, then the lifting platform 26 is controlled to rise until the lower end of the sampling tube 1 is inserted into the sample. During sampling, the piston of the suction cylinder 4 is slowly pulled outwards, so that the sample solution is sucked into the sampling tube 1 under the action of negative pressure until the sample gradually rises to reach the predetermined scale. Then the lifting platform 26 is controlled to be lowered until the container can be taken out. During sampling, the sampling tube 1 does not need to be moved, which avoids the shaking of the sampling tube 1 to make the sample drop, and effectively improves the precision of sampling.

[0025] Specifically, in order to facilitate flushing, the upper part of the sampling pipe 1 is provided with a first on-off valve 2; the upper part of the sampling pipe 1 is communicated with a horizontal branch pipe 5 below the first on-off valve 2; the horizontal branch pipe 5 is communicated with a vertical branch pipe 6; the connection between the horizontal branch pipe 5 and the vertical branch pipe 6 is provided with a second on-off valve 7. During sampling, the vertical branch pipe 6 is kept closed. When it is necessary to clean the sampling pipe 1, the second on-off valve 7 is opened, and the cleaning liquid is poured from one end of the vertical branch pipe 6, so as to flush the sampling pipe 1.

[0026] Specifically, the fixing frame includes a mounting plate 8, two upper and lower fixing plates 9 fixedly connected with the mounting plate 8, and a clamping block 15 fixedly connected at one end of the fixing plate 9; the clamping block 15 is divided into a fixed clamping block fixedly connected with the fixing plate 9 and a movable clamping block connected with the fixed clamping block through a bolt 16; one side of the fixed clamping block opposite to the movable clamping block is provided with an arc-shaped groove for clamping the sampling pipe 1. The upper and lower parts of the sampling pipe are clamped by the two sets of clamping blocks 15, and different sizes of sampling pipes 1 can be clamped.

[0027] Specifically, the fixing frame further includes a guide plate 11; the guide plate 11 is provided with a sliding cavity; the mounting plate 8 is slidably connected with the inner cavity of the guide plate 11; a rack 10 is fixedly connected to one side of the mounting plate 8 away from the fixing plate 9; the guide plate 11 is provided with a hole for driving the up-down movement of the driving assembly of the rack 10; the driving assembly includes two mounting seats 12 fixedly connected with the guide plate 11; a rotating shaft 17 is rotatably installed between the two mounting seats 12; a gear 13 engaged with the rack 10 is installed on the rotating shaft 17. Rotating the rotating shaft 17 drives the gear 13 to rotate, thereby driving the rack 10 to move up and down, and the rack 10 drives the mounting plate 8 to slide up and down in the inner cavity of the guide plate 11, thereby driving the clamped sampling pipe 1 to move up and down to adjust the height.

[0028] Specifically, the guide plate 11 is fixedly connected with a protective cover 14; the protective cover 14 covers the outside of the gear 13; a limiting notch 28 is formed on one side of the protective cover 14; a limiting block 27 is fixedly connected to the rotating shaft 17; the rotating shaft 17 can slide axially; the thickness of the gear 13 is greater than the thickness of the rack 10. When it is necessary to adjust the height of the sampling pipe 1, the rotating shaft 17 is pushed to move into the protective cover 14, so that the limiting block 27 moves into the inner cavity of the protective cover 14, as shown in Figure 2 Then the rotating shaft 17 is rotated to adjust the height of the sampling pipe 1. After adjustment, the limiting block 27 is rotated to an angle just aligned with the limiting notch 28, and then the rotating shaft 17 is pulled outwards, so that the limiting block 27 just moves into the limiting notch 28. At this time, the limiting notch 28 limits the rotation of the limiting block 27, and plays a role of braking the rotating shaft 17 and the gear 13.

[0029] Specifically, the guide plate 11 is fixedly connected with the first screw sleeve 19 through the connecting rod 18; the first screw sleeve 19 is threadedly installed on the first screw rod 20, and the lower end of the first screw rod 20 is fixedly connected to the base 21. By controlling the rotation of the first screw sleeve 19 relative to the first screw rod 20, the height of the first screw sleeve 19 relative to the first screw rod 20 can be adjusted, so that the height of the sampling pipe 1 can be adjusted, and it is convenient for the operator to find a comfortable working height.

[0030] Specifically, the connecting rod 18 is a telescopic rod, and the telescopic rod is connected through a locking screw. When it is necessary to adjust the extension distance of the working surface relative to the first screw rod 20, the locking screw can be loosened, the length of the telescopic rod is adjusted, and then the locking screw is tightened.

[0031] Specifically, in order to facilitate work, a support for installing the suction cylinder 4 is further included.

[0032] Specifically, the support includes a second screw rod 22, a second screw sleeve 23 threadedly connected with the second screw rod 22; the outer wall of the second screw sleeve 23 is fixedly connected with a fixed connecting arm 24, the fixed connecting arm 24 is connected with a moving arm 29 through a bolt; one end of the fixed connecting arm 24 and the moving arm 29 are both fixedly connected with a clamping ring 25 for clamping the suction cylinder 4. By clamping the suction cylinder 4 between the clamping rings 25, different sizes of the suction cylinder 4 can be stably clamped. When it is necessary to adjust the height of the suction cylinder 4, the second screw sleeve 23 can be rotated, so that the height of the second screw sleeve 23 relative to the second screw rod 22 is adjusted, and it is convenient for the operator to find a comfortable working height.

[0033] Specifically, in order to facilitate quick observation of the sampling volume, a scale line is arranged on the sampling pipe 1.

[0034] The working principle of the utility model:

[0035] During sampling, the height of the lifting platform 26 is first controlled to be lowered, then a container containing a sample is placed on the lifting platform 26 and located directly below the sampling pipe 1, and then the lifting platform 26 is controlled to be raised until the lower end of the sampling pipe 1 is inserted into the sample. During sampling, the first on-off valve 2 is opened, the second on-off valve 7 is closed, the piston of the suction cylinder 4 is slowly pulled outwards, and then the sample solution is sucked into the sampling pipe 1 under the action of negative pressure until the sample gradually rises to a predetermined scale. Then the lifting platform 26 is controlled to be lowered until the container can be taken out, and the sampling pipe 1 does not need to be moved during the sampling process, so that the sample is prevented from dropping due to shaking of the sampling pipe 1, and the precision of sampling is effectively improved.

[0036] In order to facilitate the operators of different heights to find comfortable working height, the height of the sampling tube 1 can be adjusted according to the height of the operator before the sampling starts. When adjusting the height of the sampling tube 1, the first sleeve 19 can be rotated relative to the first screw 20, the height of the first sleeve 19 relative to the first screw 20 can be adjusted, and thus the height of the sampling tube 1 can be adjusted. Then the height of the sampling tube 1 can be further adjusted as needed: the rotating shaft 17 is pushed to move to the inside of the protective cover 14, so that the limiting block 27 moves to the inner cavity of the protective cover 14, as shown in Figure 2 FIG. 6, then the rotating shaft 17 is rotated to adjust the height of the sampling tube 1. After adjustment, the limiting block 27 is rotated to an angle just aligned with the limiting gap 28, then the rotating shaft 17 is pulled outwards, so that the limiting block 27 just moves into the limiting gap 28, at this time the limiting gap 28 limits the rotation of the limiting block 27, and plays a braking role on the rotating shaft 17 and the gear 13.

[0037] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and still fall within the protection scope of the utility model.

Claims

1. A soil sampling instrument, comprising a sampling tube (1) and a fixing frame for holding the sampling tube (1); characterized in that: It also includes an air extraction cylinder (4) and a lifting platform (26) for placing samples; the top of the sampling tube (1) is connected to the air inlet of the air extraction cylinder (4) via a hose (3).

2. The soil sampling instrument for testing according to claim 1, characterized in that: The upper part of the sampling tube (1) is provided with a first on / off valve (2); the upper part of the sampling tube (1) is connected to a transverse branch pipe (5) below the first on / off valve (2); the transverse branch pipe (5) is connected to a longitudinal branch pipe (6); a second on / off valve (7) is provided at the connection between the transverse branch pipe (5) and the longitudinal branch pipe (6).

3. The soil sampling instrument for testing according to claim 1 or 2, characterized in that: The fixing frame includes a mounting plate (8), two upper and lower fixing plates (9) fixedly connected to the mounting plate (8), and a clamping block (15) fixedly connected to one end of the fixing plate (9); the clamping block (15) is divided into a fixed clamping block fixedly connected to the fixing plate (9) and a movable clamping block connected to the fixed clamping block by bolts (16); the side of the fixed clamping block opposite to the movable clamping block is provided with an arc-shaped groove for clamping the sampling tube (1).

4. The soil sampling instrument for testing according to claim 3, characterized in that: The fixing frame also includes a guide plate (11); a sliding cavity is provided in the guide plate (11); the mounting plate (8) is slidably connected to the inner cavity of the guide plate (11); a rack (10) is fixedly connected to the side of the mounting plate (8) away from the fixing plate (9); the guide plate (11) has a hole for a drive assembly for driving the rack (10) to move up and down; the drive assembly includes two mounting seats (12) fixedly connected to the guide plate (11); a rotating shaft (17) is rotatably installed between the two mounting seats (12); a gear (13) that meshes with the rack (10) is installed on the rotating shaft (17).

5. The soil sampling instrument for testing according to claim 4, characterized in that: A protective cover (14) is fixedly attached to the surface of the guide plate (11); the protective cover (14) covers the outside of the gear (13); a limiting notch (28) is opened on one side of the protective cover (14); a limiting block (27) is fixedly attached to the rotating shaft (17); the rotating shaft (17) can slide along the axial direction; the thickness of the gear (13) is greater than the thickness of the rack (10).

6. The soil sampling instrument for testing according to claim 4, characterized in that: The guide plate (11) is fixedly connected to the first threaded sleeve (19) via the connecting rod (18); the first threaded sleeve (19) is threaded onto the first screw (20), and the lower end of the first screw (20) is fixedly connected to the base (21).

7. The soil sampling instrument for testing according to claim 6, characterized in that: The connecting rod (18) is a telescopic rod, which is connected by a locking screw.

8. The soil sampling instrument for testing according to claim 1, characterized in that: It also includes a bracket for mounting the vacuum pump (4).

9. The soil sampling instrument for testing according to claim 8, characterized in that: The bracket includes a second screw (22) and a second screw sleeve (23) threadedly connected to the second screw (22); a fixed connecting arm (24) is fixedly connected to the outer wall of the second screw sleeve (23), and a movable arm (29) is bolted to the fixed connecting arm (24); a clamping ring (25) for clamping the air pump (4) is fixedly connected to one end of both the fixed connecting arm (24) and the movable arm (29).

10. The soil sampling instrument for testing according to claim 1, characterized in that: The sampling tube (1) is equipped with graduation lines.

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