Coarse-grained soil consolidation testing machine

Abstract

The utility model relates to a coarse-grained soil consolidation testing machine which is characterized in that a horizontal linear moving mechanism is erected on a base, when coarse-grained soil is placed, a test barrel can be pulled out through the horizontal linear moving mechanism, and the test barrel is pushed back after the coarse-grained soil is placed; coarse-grained soil can be placed and taken out without shielding, so that the operation is more convenient. The pressure sensing mechanism adopts a spoke sensor and a sensing top shaft, and the sensing top shaft is in threaded connection with the spoke sensor, so that the height can be adjusted within a certain range, and therefore, the device is suitable for test barrels and pressure tanks of more models. A servo plunger pump, an overflow valve and a pilot proportional valve are adopted in a hydraulic oil way, so that accurate control over the loading speed and the constant-pressure load can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of coarse-grained soil tests, in particular to a consolidation testing machine for coarse-grained soil. Background Art

[0002] The coarse-grained soil test is an important part of hydropower projects. In the existing coarse-grained soil testing machines, it is inconvenient to place and remove the coarse-grained soil. The space between the base and the axial pressure sensor is fixed, and only one type of pressure chamber can be adapted, which cannot meet the existing requirements. Content of the Utility Model

[0003] In view of the above situation, it is necessary to propose a consolidation testing machine for coarse-grained soil that improves versatility and is convenient to operate.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is: a consolidation testing machine for coarse-grained soil, comprising:

[0005] A frame, comprising a base, a support column and a top seat connected in sequence, and an installation space is formed between the base and the top seat through the support column;

[0006] An axial oil cylinder, configured inside the base;

[0007] A horizontal linear movement mechanism, comprising a bracket and at least two linear guide rails, and the linear guide rails are erected on the bracket and the base;

[0008] A moving plate, which is slidably matched with the horizontal linear movement mechanism, and the axial oil cylinder passes through the base and the horizontal linear movement mechanism to be directly or indirectly connected to the moving plate;

[0009] A test barrel, fixed on the moving plate;

[0010] A pressure tank, configured inside the test barrel;

[0011] A pressure sensing mechanism, comprising a spoke sensor and a sensing top shaft, the spoke sensor is fixed on the side of the top seat facing the base, and the sensing top shaft is threadedly connected to the spoke sensor and extends towards the base;

[0012] A displacement sensing mechanism, fixed on the base for detecting towards the pressure tank;

[0013] A hydraulic oil circuit, comprising an oil tank, a servo piston pump, an overflow valve, a filter, a pilot proportional valve, a pressure sensor and a pressure gauge. The oil tank is connected to the axial oil cylinder through the servo piston pump, the overflow valve, the filter and the pilot proportional valve in sequence, and the pressure sensor and the pressure gauge are connected between the pilot proportional valve and the axial oil cylinder.

[0014] Further, a pressure transmission member is provided between the axial oil cylinder and the moving plate.

[0015] Further, a limiting convex body is provided on the moving plate, and the pressure tank is in limiting fit with the limiting convex body.

[0016] Further, a plurality of grooves are provided on the moving plate, and the grooves extend from the limiting convex body to the outside of the pressure tank and are located inside the test barrel.

[0017] Further, a first bearing plate is provided inside the pressure tank, and the first bearing plate is adapted to the inner diameter of the pressure tank. A second bearing plate is provided on the first bearing plate, and the sensing top shaft abuts against the second bearing plate.

[0018] Further, the end of the sensing top shaft is arc-shaped, and an arc groove adapted to the end of the sensing top shaft is provided in the middle of the second bearing plate.

[0019] Further, two displacement sensing mechanisms are symmetrically arranged with the sensing top shaft as the center.

[0020] Further, the support column penetrates through the base and extends with a bottom foot, and the base is provided with support feet flush with the bottom foot.

[0021] Further, a guide rail baffle is provided at one end of the linear guide rail away from the bracket.

[0022] The beneficial effects of the present utility model are as follows: A horizontal linear movement mechanism is erected on the base. When placing coarse-grained soil, the test barrel can be pulled out through the horizontal linear movement mechanism and pushed back after placement; the placement and removal of coarse-grained soil are unobstructed and more convenient. The pressure sensing mechanism adopts a spoke sensor and a sensing top shaft. The sensing top shaft is threadedly connected to the spoke sensor and can be adjusted in height within a certain range, so as to adapt to more types of test barrels and pressure tanks. The hydraulic oil circuit uses a servo motor oil source. The experimental time is long. Compared with the traditional asynchronous motor combined with a proportional valve, the servo pump is energy-saving, has low noise, and low oil temperature, and can maintain a long-term experiment, and the stability of the hydraulic system is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a coarse-grained soil consolidation testing machine according to an embodiment of the present utility model;

[0024] Figure 2 is a schematic structural diagram of a coarse-grained soil consolidation testing machine in a state where the moving plate is pulled out according to an embodiment of the present utility model;

[0025] Figure 3 is a schematic structural diagram of a pressure tank of a coarse-grained soil consolidation testing machine according to an embodiment of the present utility model;

[0026] Figure 4 It is a schematic structural diagram of the feet and supporting feet of a coarse-grained soil consolidation testing machine according to an embodiment of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the hydraulic oil circuit of a coarse-grained soil consolidation testing machine according to an embodiment of the present invention.

[0028] Label description:

[0029] 100, frame; 110, base; 111, supporting foot; 120, support column; 121, foot; 130, top seat;

[0030] 200, axial oil cylinder; 210, pressure transmission member; 300, horizontal linear movement mechanism; 310, bracket;

[0031] 320, linear guide rail; 330, guide rail baffle; 340, moving plate; 341, limiting convex body;

[0032] 342, groove; 343, annular groove; 400, test barrel; 500, pressure tank; 510, first bearing plate;

[0033] 520, second bearing plate; 521, arc groove; 600, pressure sensing mechanism; 610, spoke sensor;

[0034] 620, sensing top shaft; 700, displacement sensing mechanism; 800, measurement and control cabinet; 910, fuel tank;

[0035] 920, servo plunger pump; 930, overflow valve; 940, filter; 950, pilot proportional valve;

[0036] 960, pressure sensor; 970, pressure gauge. Specific embodiments

[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further details a coarse-grained soil consolidation testing machine according to the present invention in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] Please refer to Figures 1-5 , a coarse-grained soil consolidation testing machine, comprising:

[0039] A frame 100, comprising a base 110, a support column 120 and a top seat 130 connected in sequence, and an installation space is formed between the base 110 and the top seat 130 through the support column 120;

[0040] An axial oil cylinder 200, disposed within the base 110;

[0041] The horizontal linear moving mechanism 300 includes a bracket 310 and at least two linear guide rails 320, and the linear guide rails 320 are installed on the bracket 310 and the base 110;

[0042] A moving plate 340 is slidably engaged with the horizontal linear moving mechanism 300, and the axial oil cylinder 200 passes through the base 110 and the horizontal linear moving mechanism 300 to be directly or indirectly connected to the moving plate 340;

[0043] A test barrel 400 is fixed on the moving plate 340;

[0044] A pressure tank 500 is arranged inside the test barrel 400;

[0045] The pressure sensing mechanism 600 includes a spoke sensor 610 and a sensing top shaft 620. The spoke sensor 610 is fixed on one side of the top seat 130 facing the base 110, and the sensing top shaft 620 is threadedly connected to the spoke sensor 610 and extends towards the direction of the base 110;

[0046] The displacement sensing mechanism 700 is fixed on the base 110 to detect towards the pressure tank 500;

[0047] The hydraulic oil circuit includes an oil tank 910, a servo piston pump 920, a relief valve 930, a filter 940, a pilot proportional valve 950, a pressure sensor 960 and a pressure gauge 970. The oil tank 910 is sequentially connected to the axial oil cylinder 200 through the servo piston pump 920, the relief valve 930, the filter 940 and the pilot proportional valve 950, and the pressure sensor 960 and the pressure gauge 970 are connected between the pilot proportional valve 950 and the axial oil cylinder 200.

[0048] The horizontal linear moving mechanism 300 is installed on the base 110. When placing coarse-grained soil, the test barrel 400 can be pulled out through the horizontal linear moving mechanism 300 and then pushed back after placement. The placement and removal of coarse-grained soil are unobstructed and more convenient. The pressure sensing mechanism 600 uses a spoke sensor 610 and a sensing top shaft 620. The sensing top shaft 620 can be adjusted in height within a certain range by being threadedly connected to the spoke sensor 610, so as to adapt to more models of test barrels 400 and pressure tanks 500. The hydraulic oil circuit uses a servo motor oil source. The experimental time is long. Compared with the traditional asynchronous motor combined with a proportional valve, the servo pump is energy-saving, has low noise, low oil temperature, can maintain a long-term experiment, and the stability of the hydraulic system is high

[0049] Please refer to Figure 2 , and there is a pressure transmission member 210 between the axial oil cylinder 200 and the moving plate 340. Preferably, the outer diameter of the pressure transmission member 210 gradually increases from the axial oil cylinder 200 to the moving plate 340. The setting of the pressure transmission member 210 increases the contact area between the axial oil cylinder 200 and the moving plate 340, making it more convenient for pressure transmission.

[0050] Please refer to Figure 2 , a limiting convex body 341 is provided on the moving plate 340, and the pressure tank 500 is in limiting cooperation with the limiting convex body 341. The setting of the limiting convex body 341 ensures the stability of the fixation of the pressure tank 500.

[0051] Please refer to Figure 2 , a plurality of grooves 342 are provided on the moving plate 340. The grooves 342 extend from the limiting convex body 341 to the outside of the pressure tank 500 and are located inside the test barrel 400. By setting the grooves 342, when performing a liquid pressure test, the test barrel 400 can accommodate the overflowing liquid. Specifically, the bottom of the test barrel 400 has an outwardly extending hem, and the moving plate 340 is provided with an annular groove 343 corresponding to the hem. A sealing ring is provided in the annular groove 343, and the hem is screwed or welded to the moving plate 340 and presses the sealing ring.

[0052] Please refer to Figure 3 , a first bearing plate 510 is provided inside the pressure tank 500. The first bearing plate 510 is adapted to the inner diameter of the pressure tank 500. A second bearing plate 520 is provided on the first bearing plate 510, and the sensing top shaft 620 abuts against the second bearing plate 520. By setting two-stage bearing plates, the pressure-bearing capacity is improved.

[0053] Please refer to Figure 3 , the end of the sensing top shaft 620 is arc-shaped, and an arc groove 521 adapted to the end of the sensing top shaft 620 is provided in the middle of the second bearing plate 520. The arc-shaped adaptation increases the contact surface and can better transmit the pressure.

[0054] Please refer to Figure 1 , two displacement sensing mechanisms 700 are symmetrically arranged with the sensing top shaft 620 as the center. Two displacement sensors can better measure the unit settlement, compression coefficient, compression index, rebound index, volume compression coefficient, compression modulus, consolidation coefficient, pre-consolidation pressure, etc. of the coarse-grained soil.

[0055] Please refer to Figure 4 , the support column 120 penetrates through the base 110 and extends with a bottom foot 121, and the base 110 is provided with a support foot 111 flush with the bottom foot 121. Both the base 110 and the support column 120 are provided with supports, which can improve the stability of the support.

[0056] Please refer to Figure 2 , a guide rail baffle 330 is provided at one end of the linear guide rail 320 away from the bracket 310. The setting of the guide rail baffle 330 can prevent the moving plate 340 from sliding out.

[0057] Simple, it further includes an optoelectronic sensor for positioning the pressure tank 500. The optoelectronic sensor can be arranged on the base 110 or the top base 130 as required, and an acoustic / optical alarm device is used for reminder. The fixing of the base 110 can be provided with a fixing device separately, or directly fixed through the guide rail baffle 330, the porous connecting piece and the screw.

[0058] Particularly, the fuel tank 910, the servo plunger pump 920, the overflow valve 930, the filter 940, the proportional valve, the pressure sensor 960 and the pressure gauge 970 can all be arranged in the measurement and control cabinet 800 to facilitate control and maintenance.

[0059] It can be understood that the sliding fit between the moving plate 340 and the linear guide 320 can be achieved through sliders or pulleys, which is specifically set according to needs.

[0060] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0061] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one such feature.

[0062] In summary, a consolidometer for coarse-grained soil provided by the present invention is provided with a horizontal linear movement mechanism on the base. When placing the coarse-grained soil, the test barrel can be pulled out through the horizontal linear movement mechanism and pushed back after placement; the placement and removal of the coarse-grained soil are unobstructed and more convenient. The pressure sensing mechanism adopts a spoke sensor and a sensing top shaft. The sensing top shaft is threadedly connected to the spoke sensor and can be adjusted in height within a certain range, so as to adapt to more types of test barrels and pressure tanks. The hydraulic oil circuit uses a servo motor oil source, with a long experimental time. Compared with the traditional asynchronous motor cooperating with a proportional valve, the servo pump is energy-saving, has low noise, low oil temperature, can maintain a long-term experiment, and has high stability of the hydraulic system.

[0063] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A consolidated testing machine for coarse-grained soil, characterized in that, Comprising: A frame, including a base, a support column, and a top seat connected in sequence. The base and the top seat form an installation space through the support column; An axial oil cylinder, configured within the base; A horizontal linear movement mechanism, including a bracket and at least two linear guide rails, with the linear guide rails mounted on the bracket and the base; A moving plate, slidingly engaged with the horizontal linear movement mechanism. The axial oil cylinder passes through the base and the horizontal linear movement mechanism to be directly or indirectly connected to the moving plate; A test barrel, fixed on the moving plate; A pressure tank, configured within the test barrel; A pressure sensing mechanism, including a spoke sensor and a sensing top shaft. The spoke sensor is fixed on the side of the top seat facing the base, and the sensing top shaft is threadedly connected to the spoke sensor and extends towards the direction of the base; A displacement sensing mechanism, fixed on the base for detecting towards the pressure tank; A hydraulic oil circuit, including an oil tank, a servo piston pump, an overflow valve, a filter, a pilot proportional valve, a pressure sensor, and a pressure gauge. The oil tank is connected to the axial oil cylinder through the servo piston pump, the overflow valve, the filter, and the pilot proportional valve in sequence. The pressure sensor and the pressure gauge are connected between the pilot proportional valve and the axial oil cylinder.

2. The consolidated testing machine for coarse-grained soil according to claim 1, wherein There is a pressure transfer member between the axial oil cylinder and the moving plate.

3. A consolidated testing machine for coarse-grained soil according to claim 1, characterized in that, The moving plate is provided with a limiting convex body, and the pressure tank is in limiting cooperation with the limiting convex body.

4. A coarse-grained soil consolidation testing machine according to claim 3, characterized in that, The moving plate is provided with a number of grooves, which extend from the limiting convex body to the outside of the pressure tank and are located within the test barrel.

5. A coarse-grained soil consolidation testing machine according to claim 1, characterized in that, A first bearing plate is provided within the pressure tank, which is adapted to the inner diameter of the pressure tank. A second bearing plate is provided on the first bearing plate, and the sensing top shaft abuts against the second bearing plate.

6. The consolidated testing machine for coarse-grained soil according to claim 5, wherein, The end of the sensing top shaft is arc-shaped, and an arc groove adapted to the end of the sensing top shaft is provided in the middle of the second bearing plate.

7. A consolidated testing machine for coarse-grained soil according to claim 1, characterized in that, There are two displacement sensing mechanisms symmetrically arranged with the sensing top shaft as the center.

8. A consolidated testing machine for coarse-grained soil according to claim 1, characterized in that, The support column penetrates through the base and extends with a bottom foot, and the base is provided with support feet flush with the bottom foot.

9. A coarse-grained soil consolidation testing machine according to claim 1, characterized in that, A guide rail baffle is provided at one end of the linear guide rail away from the bracket.

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