Automatic monitoring permeameter

Abstract

The utility model belongs to the technical field of permeameters, and particularly relates to an automatic monitoring permeameter. The automatic monitoring permeameter comprises a bottom plate and a controller, and the bottom plate is provided with a penetration detection mechanism and an adjusting sealing mechanism; the penetration detection mechanism comprises a water supply tank, a temperature control device, a water adding opening, a base, an L-shaped pipe, a first electromagnetic valve, a second electromagnetic valve, a connecting pipe, a water changing dragon pipe, a cutting ring, an upper cover and a water outlet pipe, the water supply tank is arranged above the bottom plate, the temperature control device is fixedly installed on the water supply tank, and the water adding opening is fixedly installed at the top of the water supply tank; the base is fixedly installed on the top of the bottom plate, the L-shaped pipe is fixedly installed on the base, one end of the L-shaped pipe is fixedly connected with the water supply tank, and the first electromagnetic valve and the second electromagnetic valve are both fixedly installed on the L-shaped pipe. The automatic monitoring permeameter provided by the utility model has the advantages that detection data can be automatically acquired, the accuracy of permeation data in a test is improved, and manpower is liberated.

Description

Technical Field

[0001] The utility model belongs to the technical field of permeameters, and in particular relates to an automatic monitoring permeameter. Background Art

[0002] The variable head permeability test is widely used in geological engineering, water conservancy engineering and construction engineering. It is mainly suitable for testing clay soil with a small permeability coefficient. The permeability coefficient is calculated according to Darcy's law based on the amount of water seepage, time, head change and temperature. From Darcy's preliminary test to modern computer simulation, the development history of permeability test reflects the progress of science and technology and the innovation of research methods. These developments have not only deepened human understanding of groundwater flow and soil physical processes, but also provided important technical support for water resources management, environmental protection and agricultural production. With the continuous emergence of new technologies and the deepening of interdisciplinary research in soil mechanics, the relationship between automated monitoring of permeability coefficient and permeability coefficient will only become closer.

[0003] However, the variable head penetration test method in the prior art has a faster water head change during the test than the constant head method, and requires multiple readings with long intervals, which affects the accuracy of data collection. In addition, the variable head penetration test has problems such as inaccurate manual readings, large human influence and errors in test results, and the inability to do without humans during the test process.

[0004] Therefore, it is necessary to provide a new automatic monitoring permeameter to solve the above technical problems. Utility Model Content

[0005] The technical problem solved by the utility model is to provide an automatic monitoring permeameter which can automatically collect detection data, improve the accuracy of permeation data in the test, and liberate manpower.

[0006] In order to solve the above technical problems, the utility model provides an automatic monitoring permeameter adopting the following technical solutions:

[0007] An automatic monitoring permeameter comprises a bottom plate and a controller, wherein a permeation detection mechanism and an adjustment sealing mechanism are arranged on the bottom plate;

[0008] The penetration detection mechanism includes a water supply tank, a temperature control device, a water inlet, a base, an L-shaped pipe, a first solenoid valve, a second solenoid valve, a connecting pipe, a water hose, a ring knife, an upper cover and a water outlet pipe. The water supply tank is arranged above the base plate, the temperature control device is fixedly installed on the water supply tank, the water inlet is fixedly installed on the top of the water supply tank, the base is fixedly installed on the top of the base plate, the L-shaped pipe is fixedly installed on the base, one end of the L-shaped pipe is fixedly connected to the water supply tank, the first solenoid valve and the second solenoid valve are both fixedly installed on the L-shaped pipe, the connecting pipe is fixedly installed on the L-shaped pipe, the water hose is fixedly installed on the top of the connecting pipe, the ring knife is arranged on the top of the base, the upper cover is arranged on the top of the ring knife, and the water outlet pipe is fixedly installed on the top of the upper cover.

[0009] As a further scheme of the utility model, the adjustment sealing mechanism includes a top plate, a first screw, a first knob, two columns, two second screws and two second knobs. The top plate is arranged above the upper cover, the first screw is rotatably mounted on the top plate, the bottom end of the first screw is rotatably connected to the upper cover, the first knob is fixedly mounted on the top of the first screw, the two columns are fixedly mounted on the top of the base, the two second screws are respectively threadedly mounted in the two columns, the two second screws both penetrate the top plate and are rotatably connected to the top plate, and the two second knobs are respectively fixedly mounted on the top of the two second screws.

[0010] As a further solution of the utility model, a placement groove is provided on the top of the base, and a water hole is provided on the inner wall of the placement groove.

[0011] As a further solution of the utility model, a drain pipe is fixedly installed on the base, and a third solenoid valve is fixedly installed on the drain pipe.

[0012] As a further solution of the utility model, four support rods are fixedly installed on the top of the base plate, and support plates are fixedly installed on the tops of the four support rods. The tops of the support plates are fixedly connected to the water supply tank, and a fixing ring is fixedly provided on the variable faucet. A connecting block is fixedly installed on the fixing ring, and one side of the connecting block is fixedly connected to the support plate.

[0013] As a further solution of the utility model, a water level detection device is fixedly installed on the top of the variable water hose, and an air port is opened on the top of the variable water hose.

[0014] Compared with the related art, the automatic monitoring permeameter provided by the utility model has the following beneficial effects:

[0015] 1. The utility model provides a penetration detection mechanism, so that the soil sample can be subjected to penetration detection by the variable water head method;

[0016] 2. The utility model is provided with an adjustable sealing mechanism, so that the height of the top plate can be adjusted according to the height of the ring cutter, so that the ring cutters of different heights can be sealed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. Among them:

[0018] Figure 1 A schematic diagram of the three-dimensional structure of the automatic monitoring permeameter provided by the utility model;

[0019] Figure 2 A schematic diagram of the partial structure of the automatic monitoring permeameter provided by the utility model;

[0020] Figure 3 It is a structural schematic diagram of the ring knife in the utility model.

[0021] In the figure: 1. bottom plate; 2. controller; 3. water supply tank; 4. temperature control device; 5. water inlet; 6. base; 7. L-shaped pipe; 8. first solenoid valve; 9. second solenoid valve; 10. connecting pipe; 11. water hose; 12. ring knife; 13. upper cover; 14. water outlet pipe; 15. top plate; 16. first screw; 17. first knob; 18. column; 19. second screw; 20. second knob; 21. placement groove; 22. water hole; 23. drain pipe; 24. third solenoid valve; 25. support rod; 26. support plate. DETAILED DESCRIPTION

[0022] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present application and does not limit the present application. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present application without departing from the scope or spirit of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model embodiments shall fall within the scope of protection of the present utility model embodiments.

[0023] Example

[0024] An automatic monitoring permeameter, please refer to Figure 1 , Figure 2 and Figure 3 , comprising a base plate 1 and a controller 2, the base plate 1 being provided with a penetration detection mechanism and an adjustment sealing mechanism;

[0025] The penetration detection mechanism includes a water supply tank 3, a temperature control device 4, a water inlet 5, a base 6, an L-shaped tube 7, a first solenoid valve 8, a second solenoid valve 9, a connecting tube 10, a water hose 11, a ring knife 12, an upper cover 13 and a water outlet pipe 14. The water supply tank 3 is arranged above the base plate 1, the temperature control device 4 is fixedly installed on the water supply tank 3, the water inlet 5 is fixedly installed on the top of the water supply tank 3, the base 6 is fixedly installed on the top of the base plate 1, the L-shaped tube 7 is fixedly installed on the base 6, one end of the L-shaped tube 7 is fixedly connected to the water supply tank 3, the first solenoid valve 8 and the second solenoid valve 9 are both fixedly installed on the L-shaped tube 7, the connecting tube 10 is fixedly installed on the L-shaped tube 7, the water hose 11 is fixedly installed on the top of the connecting tube 10, the ring knife 12 is arranged on the top of the base 6, the upper cover 13 is arranged on the top of the ring knife 12, and the water outlet pipe 14 is fixedly installed on the top of the upper cover 13.

[0026] like Figure 2 As shown, the adjustment sealing mechanism includes a top plate 15, a first screw 16, a first knob 17, two columns 18, two second screws 19 and two second knobs 20. The top plate 15 is arranged above the upper cover 13. The first screw 16 is rotatably mounted on the top plate 15. The bottom end of the first screw 16 is rotatably connected to the upper cover 13. The first knob 17 is fixedly mounted on the top of the first screw 16. The two columns 18 are fixedly mounted on the top of the base 6. The two second screws 19 are respectively threadedly mounted in the two columns 18. The two second screws 19 both penetrate the top plate 15 and are rotatably connected to the top plate 15. The two second knobs 20 are respectively fixedly mounted on the top of the two second screws 19.

[0027] By providing an adjustable sealing mechanism, the height of the top plate 15 can be adjusted according to the height of the ring cutter 12, so that the ring cutters 12 at different heights can be sealed.

[0028] like Figure 2 As shown, a placement groove 21 is provided on the top of the base 6, and a water hole 22 is provided on the inner wall of the placement groove 21; by providing the placement groove 21 and the water hole 22, the position of the ring knife 12 can be easily positioned, and the water in the base 6 can enter the ring knife 12 through the water hole 22.

[0029] like Figure 2 As shown, a drain pipe 23 is fixedly installed on the base 6, and a third solenoid valve 24 is fixedly installed on the drain pipe 23; by setting the drain pipe 23 and the third solenoid valve 24, it is convenient to discharge the air in the base 6 during the water supply process, and after the penetration test is completed, the water in the base 6 and the pipe can be discharged.

[0030] like Figure 1As shown, four support rods 25 are fixedly installed on the top of the base plate 1, and support plates 26 are fixedly installed on the top of the four support rods 25. The top of the support plate 26 is fixedly connected to the water supply tank 3. A fixing ring is fixedly provided on the variable water pipe 11, and a connecting block is fixedly installed on the fixing ring. One side of the connecting block is fixedly connected to the support plate 26. By arranging the support rods 25, the support plates 26, the fixing rings and the connecting blocks, the water supply tank 3 can be supported and the variable water pipe 11 can be reinforced, thereby improving the stability of the variable water pipe 11.

[0031] like Figure 1 As shown, a water level detection device is fixedly installed on the top of the variable water pipe 11, and an air port is opened on the top of the variable water pipe 11; by arranging the water level detection device and the air port, it is convenient to discharge the air in the variable water pipe 11 when the water in the water supply tank 3 enters the variable water pipe 11, and the water level in the variable water pipe 11 can be detected in real time.

[0032] The permeability of soil refers to the ability of soil to be penetrated by water. It is one of the important physical properties of soil and can determine the strength, deformation and consolidation properties of the soil. The permeability problem it represents is known as the three major problems in soil mechanics together with the strength problem and deformation problem.

[0033] The permeability test is mainly used to determine the permeability coefficient of soil, which is defined as the permeability flow rate per unit hydraulic gradient, usually in cm / s.

[0034] There are many methods for measuring permeability coefficient, but the current methods for measuring permeability coefficient indoors are all based on Darcy's law, namely:

[0035]

[0036] Where:

[0037] Q——Volume flow rate of permeate (cm 2 );

[0038] A———Water penetration cross-sectional area (cm 2 );

[0039] i———Hydraulic gradient, that is, the ratio of the head difference to the seepage path

[0040] According to Darcy's law in formula (1), the calculation formula (2) of the permeability coefficient of the variable head permeability test can be obtained, namely:

[0041]

[0042] Where:

[0043] K T --- Permeability coefficient of the sample at a certain temperature (cm / s);

[0044] A———Measurement tube cross-sectional area (cm 2 );

[0045] L——sample height (cm);

[0046] A———Cross-sectional area of ​​the specimen (cm 2 );

[0047] t1——The time when a test starts (s);

[0048] t2——the time when the same test ends (s);

[0049] h1——the water head height at time t1 (cm);

[0050] h2——water head height at time t2 (cm).

[0051] The working principle of the automatic monitoring permeameter provided by the utility model is as follows:

[0052] Step 1: When in use, according to the height of the ring cutter 12, the second knob 20 is turned, and the second knob 20 drives the second screw 19 to rotate. Under the action of the column 18, the top plate 15 moves up, and then the ring cutter 12 is placed in the placement groove 21, and the first knob 17 is turned, and the first knob 17 drives the first screw 16 to rotate, so that the upper cover 13 moves down, so that the upper cover 13 is pressed on the ring cutter 12;

[0053] The second step: open the first solenoid valve 8, the water in the water supply tank 3 enters the variable water hose 11, open the second solenoid valve 9 and the third solenoid valve 24, so that the water enters the base 6 and discharges the air in the base 6 through the drain pipe 23, and then close the third solenoid valve 24. At this time, the water in the base 6 will gradually penetrate the soil sample in the ring knife 12, and the water after penetration will be discharged through the outlet pipe 14. After drainage begins, close the first solenoid valve 8. At this time, during the penetration process, the water level in the variable water hose 11 gradually decreases, and the sample is tested for penetration.

[0054] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are 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, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic monitoring permeameter, characterized in that: It comprises a bottom plate and a controller, wherein the bottom plate is provided with a penetration detection mechanism and an adjustment sealing mechanism; The penetration detection mechanism includes a water supply tank, a temperature control device, a water inlet, a base, an L-shaped pipe, a first solenoid valve, a second solenoid valve, a connecting pipe, a water hose, a ring knife, an upper cover and a water outlet pipe. The water supply tank is arranged above the base plate, the temperature control device is fixedly installed on the water supply tank, the water inlet is fixedly installed on the top of the water supply tank, the base is fixedly installed on the top of the base plate, the L-shaped pipe is fixedly installed on the base, one end of the L-shaped pipe is fixedly connected to the water supply tank, the first solenoid valve and the second solenoid valve are both fixedly installed on the L-shaped pipe, the connecting pipe is fixedly installed on the L-shaped pipe, the water hose is fixedly installed on the top of the connecting pipe, the ring knife is arranged on the top of the base, the upper cover is arranged on the top of the ring knife, and the water outlet pipe is fixedly installed on the top of the upper cover.

2. The automatic monitoring permeameter according to claim 1, characterized in that: The adjustment sealing mechanism includes a top plate, a first screw, a first knob, two columns, two second screws and two second knobs. The top plate is arranged above the upper cover, the first screw is rotatably mounted on the top plate, the bottom end of the first screw is rotatably connected to the upper cover, the first knob is fixedly mounted on the top end of the first screw, the two columns are fixedly mounted on the top of the base, the two second screws are respectively threadedly mounted in the two columns, the two second screws both penetrate the top plate and are rotatably connected to the top plate, and the two second knobs are respectively fixedly mounted on the top of the two second screws.

3. The automatic monitoring permeameter according to claim 1, characterized in that: A placement groove is provided on the top of the base, and a water hole is provided on the inner wall of the placement groove.

4. The automatic monitoring permeameter according to claim 1, characterized in that: A drainage pipe is fixedly installed on the base, and a third solenoid valve is fixedly installed on the drainage pipe.

5. The automatic monitoring permeameter according to claim 1, characterized in that: Four support rods are fixedly installed on the top of the base plate, and support plates are fixedly installed on the tops of the four support rods. The tops of the support plates are fixedly connected to the water supply tank. A fixing ring is fixedly provided on the variable faucet, and a connecting block is fixedly installed on the fixing ring. One side of the connecting block is fixedly connected to the support plate.

6. The automatic monitoring permeameter according to claim 1, characterized in that: A water level detection device is fixedly installed on the top of the variable water hose, and an air port is opened on the top of the variable water hose.

Images