Device for measuring permeability coefficient

Abstract

The utility model discloses a device for measuring permeability coefficient, which comprises a sleeve, a base, a support plate and a second weighing mechanism, the sleeve is sleeved on the upper end of the base close to the inner side in a threaded manner, a sealing cover is sleeved on the outer side of the sleeve close to the upper end in a threaded manner, and a plurality of water inlet pipes are embedded on the upper end face of the sealing cover close to one side; a first weighing mechanism is arranged on the upper side of the supporting plate, a water supply tank is arranged on the upper side of the first weighing mechanism, and a plurality of water guide pipes are fixedly arranged on the lower portion of the side, close to the sleeve, of the water supply tank. The water guide pipes are connected with the water inlet pipes, the water flow speed can be adjusted and controlled without adjusting the height of the water supply tank, the structure is simple, and operation of experimenters is facilitated; and by arranging the two weighing mechanisms, two numerical values can be compared and verified, errors are reduced, and the measurement accuracy can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of soil permeability measuring components, in particular to a device for measuring permeability coefficient. Background Art

[0002] The device for measuring the permeability coefficient refers to a device that uses a sampling ring knife to cut undisturbed soil or disturbed soil at a vertical or parallel soil sample level, prepares a sample of a given density, and then measures the penetration rate of water in the soil by controlling the water flow and time, records the changes in the penetration time and water level, and finally calculates the soil permeability coefficient based on the penetration time and water level changes.

[0003] The water head of a traditional device for measuring the permeability coefficient is usually composed of a water supply tank and a water pipe, and a scale is marked on the water pipe. According to the looseness of the sample soil structure, the experimenter usually directly adjusts the height of the water supply tank and the water pipe, and then adjusts the water flow, and then calculates the soil permeability coefficient according to the change of the water level scale on the water pipe. However, in actual experiments, due to the high height of the water pipe, the experimenter needs to go up to a high place to observe the water pipe, which is inconvenient for the experimenter to inject water and read data, and easily affects the efficiency of the experiment. Therefore, it is urgent to provide a device for measuring the permeability coefficient to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings in the prior art and to provide a device for measuring permeability coefficient.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A device for measuring permeability coefficient comprises a sleeve, a base, a support plate and a No.2 weighing mechanism, wherein the sleeve is threadedly sleeved on the inner side of the upper end of the base, a sealing cover is threadedly sleeved on the outer side of the sleeve near the upper end, and a plurality of water inlet pipes are embedded and arranged at one side of the upper end surface of the sealing cover; a No.1 weighing mechanism is arranged on the upper side of the support plate, a water supply tank is arranged on the upper side of the No.1 weighing mechanism, a plurality of water guide pipes are fixedly arranged on the lower side of the water supply tank close to one side of the sleeve; the plurality of water guide pipes are fixedly arranged with the plurality of water inlet pipes through connecting heads respectively, a water collecting tank is arranged on the upper end surface of the No.2 weighing mechanism, and a water outlet pipe is fixedly arranged between the water collecting tank and the base.

[0007] A ring cutter is arranged on the inner side of the above-mentioned sleeve, and a No. 1 sealing gasket is fixedly arranged on the inner bottom surface of the sealing cover near the ring cutter and the upper side of the sleeve; a No. 1 water seepage plate is fixedly arranged on the lower end surface of the sealing cover near the inner side of the ring cutter, a No. 2 sealing gasket is fixedly arranged on the base near the ring cutter and the lower side of the sleeve, and a No. 2 water seepage plate is fixedly arranged on the base near the inner side of the ring cutter.

[0008] Through the above technical scheme, when in use, a ring cutter is used to take samples, the ring cutter and the soil inside it are placed into the sleeve, the sleeve and the ring cutter are threadedly sleeved on the base, the sealing cover is threadedly sleeved on the outside of the sleeve, and the water pipe and the water inlet pipe are fixed together through a connector; the valve at the position of the water pipe is started according to the soil conditions to control the water flow, and the outflowing water enters the water collecting tank through the No. 2 seepage plate, and according to the experimental time, the numerical changes of the No. 1 weighing mechanism and the No. 2 weighing mechanism are recorded to facilitate accurate measurement.

[0009] Furthermore, an exhaust pipe is embedded in the upper end surface of the sealing cover near the upper side of the No. 1 seepage plate, and the exhaust pipe is used to discharge the air above the base and inside the ring knife to facilitate subsequent measurements.

[0010] Furthermore, the diameter of the No. 2 seepage plate is consistent with the inner diameter of the ring knife, and the diameter of the No. 1 seepage plate is consistent with the inner diameter of the ring knife, so that the No. 2 seepage plate can fit with the outer side of the No. 1 seepage plate and the inner side of the ring knife. The No. 1 seepage plate can prevent the water flow from directly contacting the soil in the ring knife, and the No. 2 seepage plate can prevent the water and soil inside the ring knife from falling directly into the conical groove on the lower side.

[0011] Furthermore, a conical groove is provided near the lower side of the second water seepage plate in the base, and the conical groove is convenient for collecting the water that penetrates through the second water seepage plate from the upper side, so as to facilitate the water to flow to the outlet pipe.

[0012] Furthermore, support legs are fixedly provided at the four corners of the lower end surface of the support plate, and a plurality of auxiliary legs are fixedly provided at equal intervals on the lower end surface of the base. The auxiliary legs can support the base, and the support legs can support the support plate, so as to facilitate the use of the base and the support plate.

[0013] Furthermore, a water inlet is fixedly provided on the upper end surface of the water supply tank at a position away from the sleeve, and the water inlet can conveniently fill water into the water supply tank, making it easier to use the water supply tank.

[0014] Furthermore, the above-mentioned No. 2 weighing mechanism and the water collecting tank are both arranged at the lower side of the support plate, which can save space and facilitate the experimenter to observe and operate the No. 2 weighing mechanism and the No. 1 weighing mechanism on the upper side of the support plate.

[0015] The utility model has the following beneficial effects:

[0016] 1. The utility model sets a plurality of water pipes and connects a plurality of water inlet pipes to each other. The valves at the positions of the plurality of water pipes can be adjusted according to the looseness of the sample soil structure. The height of the water supply tank does not need to be adjusted, and the speed of the water flow can also be adjusted. The structure is simple and convenient for the experimenter to operate.

[0017] 2. The utility model measures the weight change of the water supply tank by the first weighing mechanism and the weight change of the water collecting tank by the second weighing mechanism, and can compare and verify the two values, reduce errors, and help improve the accuracy of measurement.

[0018] 3. The utility model can increase the air tightness between the sealing cover and the ring cutter and the sleeve by setting a No. 1 sealing gasket; and increase the air tightness between the base and the ring cutter and the sleeve by setting a No. 2 sealing gasket. By threading the sealing cover and the sleeve, and threading the base and the sleeve, the convenience of installation and the air tightness of the gap position can be increased, effectively preventing water from seeping out of the gap position at the connection, facilitating installation and disassembly, having a simple structure, and being easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the axial side of the utility model;

[0020] Figure 2 It is a front cross-sectional schematic diagram of the utility model;

[0021] Figure 3 For the utility model Figure 2 A magnified schematic diagram of point A;

[0022] Figure 4 For the utility model Figure 2 An enlarged schematic diagram of point B.

[0023] Legend:

[0024] 1. Sleeve; 2. Sealing cover; 3. Water inlet pipe; 4. Water guide pipe; 5. Base; 6. Support plate; 7. No. 1 weighing mechanism; 8. Water supply tank; 9. Water collecting tank; 10. No. 2 weighing mechanism; 11. Ring knife; 12. No. 1 seepage board; 13. Exhaust pipe; 14. No. 1 sealing gasket; 15. No. 2 seepage board; 16. Water outlet pipe; 17. No. 2 sealing gasket; 18. Conical groove; 19. Support leg; 20. Auxiliary leg; 21. Water inlet. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] Example 1

[0027] Reference Figure 1-4The utility model discloses a device for measuring permeability coefficient, comprising a sleeve 1, a base 5, a support plate 6 and a second weighing mechanism 10. The sleeve 1 is threadedly sleeved on the inner side of the upper end of the base 5, and a sealing cover 2 is threadedly sleeved on the outer side of the upper end of the sleeve 1. A plurality of water inlet pipes 3 are embedded on the upper end surface of the sealing cover 2 at one side. A first weighing mechanism 7 is arranged on the upper side of the support plate 6. The first weighing mechanism 7 is used to weigh the change of water volume in the water supply box 8. A water supply box 8 is arranged on the upper side of the first weighing mechanism 7. The water supply box 8 is arranged on the lower side of the side close to the sleeve 1. A plurality of water pipes 4 are fixedly arranged at positions; the plurality of water pipes 4 are fixedly arranged with a plurality of water inlet pipes 3 through connectors respectively; the water pipes 4 and the water inlet pipes 3 can be fixed to and disassembled with each other through the connectors for easy cleaning; a water collecting tank 9 is arranged on the upper end face of the No. 2 weighing mechanism 10, a water outlet pipe 16 is fixedly arranged between the water collecting tank 9 and the base 5, the No. 2 weighing mechanism 10 is used for weighing the change of water volume in the water collecting tank 9, and the value measured by the No. 2 weighing mechanism 10 can be compared with the value measured by the No. 1 weighing mechanism 7, so as to improve the accuracy of the measurement.

[0028] A ring knife 11 is arranged on the inner side of the sleeve 1, and a No. 1 sealing gasket 14 is fixedly arranged on the inner bottom surface of the sealing cover 2 near the ring knife 11 and the upper side of the sleeve 1, and the No. 1 sealing gasket 14 is used to increase the sealing between the sealing cover 2 and the ring knife 11; a No. 1 water seepage plate 12 is fixedly arranged on the lower end surface of the sealing cover 2 near the inner side of the ring knife 11, and a No. 2 sealing gasket 17 is fixedly arranged on the base 5 near the ring knife 11 and the lower side of the sleeve 1, and the No. 2 sealing gasket 17 is used to increase the sealing between the base 5 and the ring knife 11; a No. 2 water seepage plate 15 is fixedly arranged on the base 5 near the inner side of the ring knife 11.

[0029] An exhaust pipe 13 is embedded in the upper end surface of the sealing cover 2 near the upper side of the No. 1 seepage plate 12. The exhaust pipe 13 is used to exhaust the air above the base 5 and the inner side of the ring knife 11 to facilitate subsequent measurements; the diameter of the No. 2 seepage plate 15 is consistent with the inner diameter of the ring knife 11, and the diameter of the No. 1 seepage plate 12 is consistent with the inner diameter of the ring knife 11, so that the No. 2 seepage plate 15 can fit the outer side of the No. 1 seepage plate 12 and the inner side of the ring knife 11; the No. 1 seepage plate 12 can prevent the water flow from directly contacting the soil in the ring knife 11, and the No. 2 seepage plate 15 can prevent the water and soil inside the ring knife 11 from falling directly into the conical groove 18 on the lower side.

[0030] A conical groove 18 is provided on the base 5 near the lower side of the No. 2 seepage plate 15. The conical groove 18 is convenient for collecting the water that has seeped down from the upper side through the No. 2 seepage plate 15, so that it can flow to the outlet pipe 16; support legs 19 are fixedly provided at the four corners of the lower end surface of the support plate 6, and a plurality of auxiliary legs 20 are fixedly provided at equal intervals on the lower end surface of the base 5. The auxiliary legs 20 can support the base 5, and the support legs 19 can support the support plate 6, so as to facilitate the use of the base 5 and the support plate 6; a water inlet 21 is fixedly provided on the upper end surface of the water supply tank 8 away from the side of the sleeve 1, and the water inlet 21 can facilitate the injection of water into the water supply tank 8, so as to facilitate the use of the water supply tank 8; the No. 2 weighing mechanism 10 and the water collecting tank 9 are both arranged at the lower side of the support plate 6, which can save space and facilitate the experimenter to observe and operate the No. 2 weighing mechanism 10 and the No. 1 weighing mechanism 7 on the upper side of the support plate 6.

[0031] Working principle: When in use, after taking a sample with the ring knife 11, put the ring knife 11 and the soil inside it into the sleeve 1, thread the sleeve 1 and the ring knife 11 on the base 5, fit the No. 2 sealing gasket 17 sleeve 1 and the ring knife 11, thread the sealing cover 2 on the outside of the sleeve 1, and fit the No. 1 sealing gasket 14 with the sleeve 1 and the ring knife 11, which can effectively increase the sealing and prevent water from overflowing from the gap; fix the water pipe 4 and the water inlet pipe 3 together through the connector, start the valve at the position of the water pipe 4 according to the soil conditions, control the water flow, open the exhaust pipe 13 and close the outlet pipe 16, discharge the gas in the ring knife 11 of the base 5, then close the exhaust pipe 13 and open the outlet pipe 16, and the outflowing water passes through the No. 2 seepage plate 15 into the water collecting box 9. According to the time of the experiment, record the numerical changes of the No. 1 weighing mechanism 7 and the No. 2 weighing mechanism 10, and compare and verify the numerical values ​​of the two mechanisms, which can improve the accuracy of the measurement and facilitate accurate measurement.

Claims

1. A device for measuring permeability coefficient, comprising a sleeve (1), a base (5), a support plate (6) and a second weighing mechanism (10), characterized in that: The sleeve (1) is threadedly sleeved on the inner side of the upper end of the base (5); a sealing cover (2) is threadedly sleeved on the outer side of the sleeve (1) near the upper end; a plurality of water inlet pipes (3) are embedded and arranged at one side of the upper end surface of the sealing cover (2); a first weighing mechanism (7) is arranged on the upper side of the support plate (6); a water supply box (8) is arranged on the upper side of the first weighing mechanism (7); a plurality of water guide pipes (4) are fixedly arranged at a lower position of the water supply box (8) near one side of the sleeve (1); the plurality of water guide pipes (4) are fixedly arranged with the plurality of water inlet pipes (3) via connectors respectively; a water collecting box (9) is arranged on the upper end surface of the second weighing mechanism (10); a water outlet pipe (16) is fixedly arranged between the water collecting box (9) and the base (5); A ring knife (11) is arranged on the inner side of the sleeve (1), and a No. 1 sealing gasket (14) is fixedly arranged on the inner bottom surface of the sealing cover (2) near the ring knife (11) and the upper side of the sleeve (1); a No. 1 water seepage plate (12) is fixedly arranged on the lower end surface of the sealing cover (2) near the inner side of the ring knife (11); a No. 2 sealing gasket (17) is fixedly arranged on the base (5) near the ring knife (11) and the lower side of the sleeve (1), and a No. 2 water seepage plate (15) is fixedly arranged on the base (5) near the inner side of the ring knife (11).

2. A device for measuring permeability according to claim 1, characterized in that: An exhaust pipe (13) is embedded in the upper end surface of the sealing cover (2) near the upper side of the first water seepage plate (12).

3. A device for measuring permeability according to claim 1, characterized in that: The diameter of the No. 2 water seepage plate (15) is consistent with the inner diameter of the ring knife (11), and the diameter of the No. 1 water seepage plate (12) is consistent with the inner diameter of the ring knife (11).

4. A device for measuring permeability according to claim 1, characterized in that: The base (5) is provided with a conical groove (18) near the lower side of the second water seepage plate (15).

5. The device for measuring permeability coefficient according to claim 1, characterized in that: The lower end surface of the support plate (6) is fixedly provided with support legs (19) at four corners, and the lower end surface of the base (5) is fixedly provided with a plurality of auxiliary legs (20) at equal intervals.

6. The device for measuring permeability coefficient according to claim 1, characterized in that: A water inlet (21) is fixedly provided on the upper end surface of the water supply box (8) at a position away from the sleeve (1).

7. The device for measuring permeability coefficient according to claim 1, characterized in that: The second weighing mechanism (10) and the water collecting box (9) are both arranged at the lower side of the support plate (6).

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