Soil body sampling permeation experiment device

Abstract

The utility model discloses a soil body sampling permeability experiment device which comprises a sampling barrel, a cutting ring barrel is fixedly connected to the lower edge of the sampling barrel, a sealing base is arranged below the cutting ring barrel, a permeable stone is embedded in the sealing base, a connecting rod is installed in the sampling barrel in a sliding mode, and an abutting plate is fixedly connected to the lower end of the connecting rod. A limiting sliding groove is formed in the connecting rod, a threaded adjusting rod is rotationally installed in the limiting sliding groove, a limiting interference sliding block is installed in the limiting sliding groove in a sliding mode, a threaded through hole is formed in the limiting interference sliding block, and the threaded through hole is in threaded fit with the threaded adjusting rod. The upward moving stroke of the abutting plate is limited through the limiting interference sliding block, the abutting plate can block soil continuously entering the sampling barrel, then the length of the soil entering the sampling barrel and the length of a soil medium in the Darcy law are controlled, and the problem that in the multiple test processes, due to the fact that the lengths of the soil medium are different, the test result deviates is solved.

Description

Technical Field

[0001] This utility model relates to a permeability testing device, and more particularly to a soil sampling permeability testing device. Background Technology

[0002] The permeability coefficient is a quantitative indicator that characterizes the permeability of soil and is a fundamental parameter that must be used in seepage calculations. It plays an important role in soil improvement and treatment, as well as in the construction of various underground engineering projects.

[0003] For example, a soil sampling permeability testing device, disclosed in Chinese Patent Publication No. CN221199382U, includes: an outer sleeve with a serrated bottom; an inner sleeve tightly fitted inside the outer sleeve and detachably connected, with a sliding sleeve coaxially mounted on the top of the inner sleeve extending beyond the top of the outer sleeve; a rotating shaft adjustablely mounted in the sliding sleeve so that its bottom is inside the inner sleeve and its top is outside the inner sleeve, with a water channel inside the rotating shaft, an inlet near the top connecting to the water channel, an outlet near the bottom connecting to the water channel, and graduations on its outer surface; a rotating handle vertically mounted on the top of the rotating shaft; a pressure plate mounted on the bottom of the rotating shaft, with permeable holes; and a buoyancy body mounted on the top surface of the pressure plate. This invention uses a rotary excavation method for easier sampling, and utilizes the descent speed of the rotating shaft to calculate the permeability of the sampled soil, making operation simple and quick.

[0004] Some problems were found when using the existing soil sampling permeability test device. The permeability calculation formula is based on Darcy's law: K=(q×l) / (A×h), where l is the length of the medium and A is the area of ​​the medium through which the liquid flows. The internal cross-section of the sampling tube is fixed and A is limited. However, it is difficult to control the length of the medium during the sampling process, which will affect the final experimental data. Utility Model Content

[0005] The purpose of this invention is to provide a soil sampling and permeability testing device to solve the existing problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a soil sampling permeability test device, comprising a sampling cylinder, a ring cutter cylinder fixedly connected to the lower edge of the sampling cylinder, a sealing base provided below the ring cutter cylinder, a permeable stone embedded in the sealing base, a connecting rod slidably installed inside the sampling cylinder, a stop plate fixedly connected to the lower end of the connecting rod, a limiting groove provided inside the connecting rod, a threaded adjusting rod rotatably installed inside the limiting groove, a limiting interference slider slidably installed inside the limiting groove, a threaded through hole provided inside the limiting interference slider, and the threaded through hole threadedly engaging with the threaded adjusting rod.

[0007] Preferably, a water inlet is fixedly connected to the front of the sampling tube near the upper edge, connecting lugs are fixedly connected around the sampling tube, and pressure plates are fixedly connected to both sides of the sampling tube.

[0008] Preferably, a sealing rubber gasket is fixedly connected to the sealing base, and a threaded connecting rod is fixedly connected to the sealing base near the perimeter. The threaded connecting rod cooperates with the connecting lug, and a wing nut is threaded onto the threaded connecting rod.

[0009] Preferably, a handle is fixedly connected to the upper end of the connecting rod, and a rotating disk is fixedly connected to the upper end of the threaded adjusting rod.

[0010] Preferably, the connecting rod is engraved with graduations.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By limiting the upward stroke of the stop plate through the limiting interference slider, the stop plate can block the soil from continuing to enter the sampling tube, thereby controlling the length of soil entering the sampling tube and the length of soil medium in Darcy's law, avoiding the problem of deviation in test results due to different lengths of soil medium in multiple tests.

[0013] 2. By placing the sealing base against the lower edge of the ring cutter tube and passing the threaded connecting rod through the connecting lug, and then screwing on the wing nut, the sealing base can be fixed to the bottom of the ring cutter tube, which can block the lower end of the sampling tube and prevent soil from being washed out with the water flow. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 This is a schematic diagram of the sampling cylinder structure of this utility model;

[0017] Figure 4 This is an exploded view of the connecting rod of this utility model;

[0018] Figure 5 This is a schematic diagram of the sealing base structure of this utility model;

[0019] Figure 6 For the present utility model Figure 2 Enlarged view of point A in the middle.

[0020] In the diagram: 1. Sampling cylinder; 101. Ring cutter cylinder; 102. Water inlet; 103. Pressure plate; 104. Connecting lug; 2. Connecting rod; 201. Limiting groove; 202. Threaded adjusting rod; 203. Rotary disk; 204. Limiting interference slider; 205. Threaded through hole; 206. Handle; 207. Support plate; 208. Scale; 3. Sealing base; 301. Permeable stone; 302. Sealing rubber gasket; 303. Threaded connecting rod; 304. Button. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-6 This utility model provides a technical solution: a soil sampling and permeability test device, including a sampling cylinder 1, a ring cutter cylinder 101 fixedly connected to the lower edge of the sampling cylinder 1, a sealing base 3 provided below the ring cutter cylinder 101, a permeable stone 301 embedded in the sealing base 3, a connecting rod 2 slidably installed inside the sampling cylinder 1, a stop plate 207 fixedly connected to the lower end of the connecting rod 2, a limiting groove 201 opened inside the connecting rod 2, a threaded adjusting rod 202 rotatably installed inside the limiting groove 201, a limiting interference slider 204 slidably installed inside the limiting groove 201, a threaded through hole 205 opened inside the limiting interference slider 204, and the threaded through hole 205 threadedly engaged with the threaded adjusting rod 202.

[0023] In this embodiment, the ring cutter tube 101 facilitates the insertion of the sampling tube 1 into the soil for sampling. After the sampling tube 1 is inserted into the soil, the soil enters the sampling tube 1 and pushes the abutment plate 207 upward. The upward movement of the abutment plate 207 drives the connecting rod 2 upward, which in turn drives the limiting interference slider 204 to move. The limiting interference slider 204 abuts against the top of the sampling tube 1, restricting the upward movement of the connecting rod 2 and controlling the length of soil entering the sampling tube 1, which is the length of soil medium in Darcy's law. The threaded adjustment rod 202 is threadedly engaged with the threaded through hole 205. Rotating the threaded adjustment rod 202 can drive the limiting interference slider 204 to move, thereby adjusting the position of the limiting interference slider 204 on the connecting rod 2, and thus adjusting the upward stroke of the connecting rod 2. According to the requirements, the length of soil entering the sampling tube 1 can be controlled to avoid the problem of deviation in test results due to different lengths of soil medium during multiple tests. The sealing base 3 can block the lower edge of the ring cutter tube 101 to prevent soil from scattering during the experiment.

[0024] In order to fix the sealing base 3 under the sampling tube 1, the device adopts the following technical solution: an inlet 102 is fixedly connected to the front of the sampling tube 1 near the upper edge; connecting lugs 104 are fixedly connected around the sampling tube 1; pressure plates 103 are fixedly connected to both sides of the sampling tube 1; a sealing rubber gasket 302 is fixedly connected to the top of the sealing base 3; a threaded connecting rod 303 is fixedly connected to the top of the sealing base 3 near the four edges; the threaded connecting rod 303 cooperates with the connecting lugs 104; and a wing nut 304 is threaded on the threaded connecting rod 303.

[0025] Water can be injected into the sampling cylinder 1 through the water inlet 102 via a water pipe. The pressure plate 103 is easy for the operator to grip and apply downward pressure to insert the sampling cylinder 1 into the soil for sampling. The connecting lug 104 and the threaded connecting rod 303 cooperate with each other to place the sealing base 3 against the lower edge of the ring cutter cylinder 101 and allow the threaded connecting rod 303 to pass through the connecting lug 104. Then, screw on the wing nut 304 to fix the sealing base 3 under the ring cutter cylinder 101. The sealing rubber gasket 302 can seal the gap between the ring cutter cylinder 101 and the sealing base 3.

[0026] In order to achieve the purpose of pulling the connecting rod 2, the device adopts the following technical solution: a handle 206 is fixedly connected to the upper end of the connecting rod 2, a rotating disk 203 is fixedly connected to the upper end of the threaded adjusting rod 202, and a scale 208 is engraved on the connecting rod 2.

[0027] The handle 206 makes it easy to pull the connecting rod 2 upward. The upward movement of the connecting rod 2 will cause the abutment 207 to move upward, so that the abutment 207 is above the water inlet 102, allowing clean water to be injected into the sampling tube 1. The scale 208 makes it easy for the operator to adjust the position of the limit interference slider 204.

[0028] The working principle and usage process of this utility model are as follows: When in use, the sampling cylinder 1 is erected on the soil in the sampling area. Rotating the rotating disk 203 drives the threaded adjusting rod 202 to rotate, which in turn moves the limiting interference slider 204. When the limiting interference slider 204 moves to a suitable height, the pressure plate 103 presses down on the sampling cylinder 1, inserting it into the soil for sampling. As the soil enters the sampling cylinder 1, it pushes the abutment plate 207 upwards. This upward movement of the abutment plate 207, via the connecting rod 2, causes the limiting interference slider 204 to move upwards. During this upward movement, the limiting interference slider 204 contacts the top of the sampling cylinder 1, restricting the upward movement of the connecting rod 2, and consequently limiting the further upward movement of the abutment plate 207. If soil cannot continue to enter the sampling cylinder 1, it will be difficult to push the sampling cylinder 1 down further. At this point, the sampling cylinder 1 can be pulled out to complete the sampling. Place the sealing base 3 against the lower edge of the ring cutter cylinder 101 and let the threaded connecting rod 303 pass through the connecting lug 104. Then screw on the wing nut 304 to fix the sealing base 3 under the ring cutter cylinder 101. Rotate the rotating disk 203 to drive the threaded adjusting rod 202 to rotate, and control the limit interference slider 204 to move down to the lower end. At this time, the handle 206 can be used to continue to drive the abutment plate 207 to move up through the connecting rod 2, so that the abutment plate 207 is above the water inlet 102. Connect the water inlet 102 to the water pipe to pour clean water into the sampling cylinder 1 to carry out the permeation test.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A soil sampling and permeability testing apparatus comprising a sampling barrel (1) characterised in that: The sampling cylinder (1) is fixed with a ring cutter barrel (101) at the lower edge, a sealing base (3) is arranged below the ring cutter barrel (101), a water permeable stone (301) is embedded and mounted in the sealing base (3), a connecting rod (2) is slidingly mounted in the sampling cylinder (1), a resisting plate (207) is fixed to the lower end of the connecting rod (2), a limiting sliding groove (201) is formed in the connecting rod (2), a threaded adjusting rod (202) is rotatably mounted in the limiting sliding groove (201), a limiting interference sliding block (204) is slidingly mounted in the limiting sliding groove (201), a threaded through hole (205) is formed in the limiting interference sliding block (204), and the threaded through hole (205) is threadedly matched with the threaded adjusting rod (202).

2. The soil sampling and permeability testing device of claim 1, wherein: The sampling cylinder (1) is fixed with a water inlet (102) at the position close to the upper end edge on the front side, connecting ears (104) are fixed around the sampling cylinder (1), and pressing plates (103) are fixed on both sides of the sampling cylinder (1).

3. The soil sampling and permeability testing device of claim 2, wherein: A sealing rubber pad (302) is fixed to the upper surface of the sealing base (3), threaded connecting rods (303) are fixed to the position close to the peripheral edge on the upper surface of the sealing base (3), the threaded connecting rods (303) are matched with the connecting ears (104), and butterfly nuts (304) are threadedly mounted on the threaded connecting rods (303).

4. The soil sampling and permeability testing device of claim 1, wherein: A handle (206) is fixed to the upper end of the connecting rod (2), and a rotating disc (203) is fixed to the upper end of the threaded adjusting rod (202).

5. The soil sampling and permeability testing device of claim 1, wherein: A scale (208) is engraved on the connecting rod (2).

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