Depth-keeping liquid suction device of soil analysis sedimentation cylinder

Abstract

The utility model discloses a soil analysis settlement cylinder depth-keeping liquid suction device which comprises a liquid suction pipe, the liquid suction pipe vertically extends into suspension in a settlement cylinder for a fixed depth, and the bottom end of the liquid suction pipe is respectively connected with a liquid suction port and a cleaning pipeline through a conversion structure. According to the utility model, after the suspension is extracted every time, the residual suspension in the liquid suction pipe is discharged and the pipeline is cleaned, and the natural sedimentation in the sedimentation cylinder is not interfered, so that the accuracy and reliability of a numerical value obtained by analysis and calculation are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of soil analysis, in particular to a fixed-depth liquid-absorbing device for a soil analysis sedimentation cylinder. Background Art

[0002] In the soil particle analysis test, the soil particle size analysis is usually completed by the pipette method according to Stokes' law. According to the difference in the sedimentation speed of soil particles at different levels under the natural sedimentation state, the time for the particles at different levels to settle to a given depth is calculated, so that a certain volume of suspension at the depth is sucked at the corresponding time, and its mass is weighed after drying to calculate the percentage of soil particles at different levels. The common suspension suction device inserts a single tube connected to the suction power module into the fixed depth of the suspension for suction. Since there is inevitably residual suspension in the tube after each suction, if it is not completely drained and then extracted again, the subsequent calculated values ​​will inevitably be too high. If the residual suspension is refluxed after extraction, it will affect the natural sedimentation, making the measured value unreliable. The existing method is to take out the suction tube for cleaning after each extraction, and then put it in for the next collection. However, even if it is gently inserted each time, the frequent insertion and removal will cause considerable disturbance to the suspension. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a soil analysis sedimentation cylinder fixed-depth liquid suction device. After each extraction of the suspension, the remaining suspension in the suction tube is drained and the pipeline is cleaned without interfering with the natural sedimentation in the sedimentation cylinder, thereby ensuring the accuracy and reliability of the values ​​obtained by analysis and calculation.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides a soil analysis sedimentation cylinder fixed-depth liquid suction device, including a liquid suction tube, which vertically extends into the sedimentation cylinder to a fixed depth of suspended liquid, and the bottom end of the liquid suction tube is respectively connected to a liquid suction port and a cleaning pipeline through a conversion structure.

[0005] Furthermore, the cleaning pipeline is provided with an annular tube cavity, the annular tube cavity is sleeved on the outside of the liquid suction tube, and the cleaning medium supply mechanism is connected to the lower end of the liquid suction tube through the annular tube cavity.

[0006] Furthermore, the annular tube cavity is located between the inner sleeve and the outer sleeve, the inner sleeve and the outer sleeve are fixedly sleeved relative to each other, the pipette is lifted and slidably attached to the inner wall surface of the inner sleeve, and a cleaning connection port is opened on the bottom tube wall of the pipette.

[0007] Furthermore, the bottom end of the outer sleeve is sealed, the lower port of the inner sleeve is spaced apart from the lower end surface of the outer sleeve, the lower port of the pipette is fixedly provided with an annular baffle plate adapted to the cross-section of the annular lumen, and the annular baffle plate is lifted and lowered between the lower end surfaces of the inner sleeve and the outer sleeve; the pipette port is located at the bottom of the outer sleeve, and the annular baffle plate is used to separate the pipette port and the annular lumen.

[0008] Furthermore, a protrusion is provided on the bottom end surface of the outer sleeve, and the protrusion is tightly matched with the lower port plug of the pipette.

[0009] Furthermore, the liquid suction port is annularly opened on the tube side wall at the bottom end of the outer sleeve, and the outer circular contour of the annular baffle is provided with a vertical baffle ring, and the vertical baffle ring is fitted to the inner wall surface of the outer sleeve to rise and fall and slide.

[0010] Beneficial effect: The utility model is a soil analysis sedimentation cylinder fixed-depth liquid suction device, which can replace the connecting path of the liquid suction pipeline through the conversion structure without changing the liquid suction position. After completing one extraction, the liquid suction pipeline is connected with the cleaning pipeline, so that the cleaning medium is introduced, the excess suspension in the pipeline is discharged, and the residual particles that may adhere to the pipe wall are cleaned, thereby ensuring the numerical accuracy and reliability of the particle analysis of each level of soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attached Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0012] Attached Figure 2 A half-section schematic diagram of a conversion structure of a liquid absorption state in one embodiment of the utility model;

[0013] Attached Figure 3 It is a half-section schematic diagram of the conversion structure of the cleaning state of an embodiment of the utility model. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] As attached Figure 1-3 The soil analysis sedimentation cylinder fixed depth liquid suction device comprises a liquid suction pipe 1, which is vertically extended into the sedimentation cylinder to a fixed depth of the suspended liquid, and the bottom end of the liquid suction pipe 1 is respectively connected to a liquid suction port 3 and a cleaning pipeline 4 through a conversion structure 2.

[0016] Based on the original pipette, this solution adds a cleaning pipeline and a dedicated pipette port structure, and designs a conversion structure so that the lumen of the original pipette can be connected to the two separately, so that the device can alternately switch between the pipette state and the cleaning state. After each suspension sample is extracted, it switches to the cleaning state to drain the remaining suspension in the pipette and clean the tube wall, thereby ensuring the accuracy and reliability of the values ​​obtained in the final analysis and calculation.

[0017] Preferably, the cleaning pipeline 4 is provided with an annular lumen 41, and the annular lumen 41 is sleeved on the outside of the liquid pipette 1, and the cleaning medium supply mechanism 42 is connected to the lower end of the liquid pipette 1 through the annular lumen 41. The cleaning medium supply mechanism includes a clean water supply module and a hot air supply module, which can connect the annular lumen with the liquid pipette after extracting a certain volume of suspension, and successively introduce clean water and hot air, and use clean water to push out the remaining suspension in the discharge pipe and clean the pipe wall, and then use hot air to discharge the cleaning water in the pipe and dry the pipe wall, so as to avoid the residual water from affecting the volume of the extracted suspension, thereby causing the phenomenon of insufficient extraction and low analysis value, and further ensure the accuracy and reliability of the numerical value obtained by the final analysis and calculation.

[0018] By directly connecting the annular tube cavity to the bottom of the suction tube, the suction tube can be fully flushed from bottom to top to avoid residual suspension, and the suction tube is vertically inserted into the sedimentation cylinder, which can reduce the impact on the natural sedimentation of soil particles on the outside. Therefore, the cleaning pipeline immersed in the suspension is designed as an annular tube cavity sleeve and the outside of the suction tube, which also plays a role in reducing the impact on the natural sedimentation of soil particles on the outside.

[0019] Embodiment: The annular lumen 41 is located between the inner sleeve 5 and the outer sleeve 6. The inner sleeve 5 and the outer sleeve 6 are fixedly sleeved relative to each other. The pipette 1 is fitted on the inner wall of the inner sleeve 5 to rise and fall, and a cleaning connection port 11 is provided on the bottom wall of the pipette 1. The connection and blocking of the annular lumen and the pipette are achieved through the cooperation between the inner sleeve and the cleaning connection port. In the liquid suction state, the pipette wall at the location of the cleaning connection port is fitted on the inner wall of the inner sleeve, so that the cleaning connection port is blocked. When the pipette moves downward relative to the inner sleeve, so that the cleaning connection port moves below the inner sleeve port, the cleaning connection port is opened, and the annular lumen is connected with the pipette, and the cleaning state is entered.

[0020] The bottom end of the outer sleeve 6 is sealed, the lower end of the inner sleeve 5 is spaced apart from the lower end surface of the outer sleeve 6, the lower end of the pipette 1 is fixed with an annular baffle 12 adapted to the cross-section of the annular lumen 41, and the annular baffle 12 is raised and lowered between the lower end surfaces of the inner sleeve 5 and the outer sleeve 6; the pipette port 3 is located at the bottom of the outer sleeve 6, and the annular baffle 12 is used to separate the pipette port 3 and the annular lumen 41.

[0021] That is, in the process of the liquid suction tube moving downward, the cleaning connecting port is opened and the liquid suction port is gradually closed by the annular baffle, thereby realizing the conversion between the two states of liquid suction and cleaning. The positions of the inner and outer sleeves are fixed relative to the sedimentation tube, and the liquid suction tube performs a small distance lifting and lowering movement inside, which will not cause disturbance to the liquid in the sedimentation tube.

[0022] Preferably, the bottom end surface of the outer sleeve 6 is provided with a protrusion 61, and the protrusion 61 is tightly matched with the lower port of the pipette 1. The tight fit of the protrusion with the lower port of the pipette ensures airtightness, enhances the barrier effect, and prevents new suspension from entering the tube during cleaning.

[0023] The liquid suction port 3 is annularly opened on the tube side wall at the bottom end of the outer sleeve 6, which can evenly absorb the suspension at a given depth, avoid errors in local absorption, and further improve the measurement accuracy; the outer circular contour of the annular baffle 12 is provided with a vertical baffle ring 13, and the vertical baffle ring 13 is fitted to the inner wall surface of the outer sleeve 6 for lifting and sliding. A vertical baffle ring is correspondingly provided corresponding to the annular liquid suction port, and the vertical baffle ring moves downward with the liquid suction tube to play a role in blocking the liquid suction port. A U-shaped structure is formed between the vertical baffle ring, the annular baffle, and the tube wall at the bottom end of the liquid suction tube, which fits perfectly with the annular groove on the outer side of the protrusion on the bottom surface of the outer sleeve, and can ensure the airtightness of the liquid suction port after blocking.

[0024] In this scheme, the conversion structure 2 refers to the structure that determines the connection relationship between the inner cavity of the pipette and the pipette port 3 and the cleaning pipeline 4. In the above embodiment, the conversion structure 2 includes a structure of relative matching relationship between the pipette 1, the inner sleeve 5, and the outer sleeve 6.

[0025] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A soil analysis sedimentation cylinder fixed depth liquid suction device, characterized in that: It comprises a liquid suction pipe (1), the liquid suction pipe (1) vertically extends into the suspension in the sedimentation cylinder to a fixed depth, and the bottom end of the liquid suction pipe (1) is respectively connected to a liquid suction port (3) and a cleaning pipeline (4) through a conversion structure (2); The cleaning pipeline (4) is provided with an annular tube cavity (41), and the annular tube cavity (41) is located between the inner sleeve (5) and the outer sleeve (6). The inner sleeve (5) and the outer sleeve (6) are fixedly sleeved relative to each other, and the liquid pipette (1) is attached to the inner wall surface of the inner sleeve (5) to rise and fall and slide. The bottom end tube wall of the liquid pipette (1) is provided with a cleaning communication port (11).

2. A soil analysis sedimentation cylinder fixed depth liquid suction device according to claim 1, characterized in that: The annular tube cavity (41) is sleeved on the outside of the liquid pipette (1), and the cleaning medium supply mechanism (42) is connected to the lower end of the liquid pipette (1) through the annular tube cavity (41).

3. A soil analysis sedimentation cylinder fixed depth liquid suction device according to claim 2, characterized in that: The bottom end of the outer sleeve (6) is sealed, the lower end of the inner sleeve (5) is spaced apart from the lower end surface of the outer sleeve (6), the lower end of the liquid suction tube (1) is fixedly provided with an annular baffle (12) adapted to the cross-section of the annular tube cavity (41), and the annular baffle (12) is lifted and arranged between the lower end surfaces of the inner sleeve (5) and the outer sleeve (6); the liquid suction port (3) is located at the bottom of the outer sleeve (6), and the annular baffle (12) is used to separate the liquid suction port (3) and the annular tube cavity (41).

4. A soil analysis sedimentation cylinder fixed depth liquid suction device according to claim 3, characterized in that: The bottom end surface of the outer sleeve (6) is provided with a protrusion (61), and the protrusion (61) is tightly matched with the lower end plug of the liquid pipette (1).

5. A soil analysis sedimentation cylinder fixed depth liquid suction device according to claim 4, characterized in that: The liquid suction port (3) is annularly opened on the tube side wall at the bottom end of the outer sleeve (6); the outer circular contour of the annular baffle (12) is provided with a vertical baffle ring (13); the vertical baffle ring (13) is fitted to the inner wall surface of the outer sleeve (6) to rise and fall and slide.

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