Expansive force testing device for expansive soil

Abstract

The utility model belongs to the technical field of soil detection, and particularly relates to an expansive soil expansive force testing device which comprises a base, a liquid storage tank and a controller, a test barrel is arranged in the middle of the top of the base, lifting air cylinders are arranged on the two sides of the top of the base, a top plate is arranged on the tops of the lifting air cylinders, an elastic piece is arranged in the middle of the bottom of the top plate, a connecting rod is arranged at the bottom of the elastic piece, and a counter-force plate is arranged at the bottom of the connecting rod. A pressure sensor is arranged between the connecting rod and the counter-force plate; the liquid storage tank is arranged on one side of the top of the top plate, the bottom of the liquid storage tank penetrates through the top plate and is provided with a liquid discharging pipe, a metering battery valve is arranged at the bottom of the liquid discharging pipe, and a liquid conveying pipe is arranged at the bottom of the metering battery valve; the device is reasonable in structure, convenient to adjust the water injection rate in the use process, high in automation degree, convenient to adjust the height of the counter-force plate, high in flexibility and wide in application range.

Description

Technical Field

[0001] The utility model relates to the technical field of soil detection, in particular to a device for testing the swelling force of expansive soil. Background Art

[0002] Expansive soil is a geological body with multiple fissures and significant expansion and contraction formed in the natural geological process. The clay particles are mainly composed of highly hydrophilic minerals montmorillonite and illite. As one of the important indicators for evaluating the properties of expansive soil, the accuracy of its measurement is of great significance for studying the mechanical properties of expansive soil and evaluating the disaster-causing mechanism of expansive soil. Expansive force refers to the force generated by increasing the water content while keeping the volume unchanged. There are many methods for testing expansive force. The traditional common test methods mainly include the expansion counterpressure method, the pressurized expansion method and the balanced pressurization method.

[0003] In the prior art, the application number is CN202320415774.5, and the application name is a kind of expansive soil expansion force test device. The technical scheme recorded includes a reaction frame, a test chamber and a protective cover. The reaction frame includes a base, a column, a top plate, a reaction plate and a screw mechanism for driving the reaction plate to rise and fall. The test chamber includes a ring knife seat, a ring knife and a top cover. The ring knife seat is fixed on the base, and the ring knife is detachably connected to the ring knife seat. The top cover is connected to the bottom of the reaction plate through a connecting rod. The ring knife seat, the ring knife and the top cover together form a closed sample test space. The ring knife seat is provided with a number of seepage holes, and the bottom of the top cover is connected to a permeable plate. The ring knife seat is embedded with a pressure sensor, and the pressure sensor is connected to a data acquisition display device through a wire; the protective cover includes an upper cover body and a lower cover body, the upper cover body is detachably connected to the bottom of the reaction plate, and the lower cover body is detachably connected to the ring knife seat. The test device can prevent the test mechanism from being damaged by the influence of the external environment and has a good dustproof effect.

[0004] However, there are still some shortcomings in the actual use, such as it is inconvenient to adjust the water injection volume, it is inconvenient to adjust the height of the reaction plate, and the flexibility is poor. For this reason, we propose a new type of expansive soil expansion force testing device. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the problems existing in the prior art, the present utility model is proposed.

[0007] Therefore, the purpose of the utility model is to provide an expansive soil swelling force testing device, which is convenient for adjusting the water injection volume during use, has a high degree of automation, and is convenient for adjusting the height of the reaction plate, has high flexibility and a wide range of applications.

[0008] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0009] An expansive soil expansion force testing device comprises a base, a liquid storage tank and a controller;

[0010] in,

[0011] A test barrel is arranged in the middle of the top of the base, lifting cylinders are arranged on both sides of the top of the base, a top plate is arranged on the top of the lifting cylinder, an elastic member is arranged in the middle of the bottom of the top plate, a connecting rod is arranged at the bottom of the elastic member, a reaction plate is arranged at the bottom of the connecting rod, and a pressure sensor is arranged between the connecting rod and the reaction plate;

[0012] The liquid storage tank is arranged on one side of the top of the top plate, a liquid discharge pipe is arranged at the bottom of the liquid storage tank through the top plate, a metering battery valve is arranged at the bottom of the liquid discharge pipe, a liquid infusion pipe is arranged at the bottom of the metering battery valve, the bottom of the liquid infusion pipe is connected to the reaction plate, and passes through the reaction plate to extend to the inside of the test barrel;

[0013] A controller is disposed on the front surface of the top plate, a display unit is disposed on the front surface of the controller, and the display unit is electrically connected to the pressure sensor.

[0014] As a preferred solution of the expansive soil expansion force testing device described in the utility model, wherein: supporting legs are arranged at the four corners of the bottom of the base, and a suction cup is arranged at the bottom of the supporting legs.

[0015] As a preferred solution of the device for testing the swelling force of expansive soil described in the utility model, the elastic member is a reset spring.

[0016] As a preferred solution of the expansive soil expansion force testing device described in the utility model, a liquid replenishing port is provided on the top of the liquid storage tank.

[0017] As a preferred solution of the expansive soil expansion force testing device described in the utility model, wherein: the top of the reaction plate is provided with an infusion hole matched with the infusion tube.

[0018] As a preferred solution of the device for testing the swelling force of expansive soil described in the utility model, wherein: the display unit includes a display screen and a speaker.

[0019] As a preferred solution of the expansive soil expansion force testing device described in the utility model, wherein: the controller is connected to an external power supply through a wire.

[0020] Compared with the prior art, the utility model has the following beneficial effects: the top plate is driven to move up and down by the lifting cylinder, and the top plate drives the reaction plate to move up and down, so the height of the reaction plate can be adjusted conveniently, with high flexibility and a wide range of applications; in addition, through the cooperation of the liquid storage tank, the discharge pipe, the metering solenoid valve and the infusion pipe, quantitative liquid injection is convenient, and the liquid injection method is to inject water from above, which can ensure sufficient absorption by the soil and help improve the accuracy of the inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the test barrel structure of the utility model.

[0025] In the figure, 100 is a base, 110 is a test barrel, 120 is a lifting cylinder, 130 is a top plate, 140 is an elastic member, 150 is a connecting rod, 160 is a reaction plate, 170 is a pressure sensor, 200 is a liquid storage tank, 210 is a liquid discharge pipe, 220 is a metering solenoid valve, 230 is an infusion pipe, 300 is a controller, and 310 is a display unit. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] The utility model provides the following technical solutions: an expansive soil expansion force testing device, which is convenient for adjusting the water injection amount during use, has a high degree of automation, and is convenient for adjusting the height of the reaction plate, has high flexibility, and has a wide range of applications;

[0031] Figures 1 to 3 The structure diagram of an embodiment of an expansive soil expansion force testing device of the utility model is shown, and the main part thereof includes a base 100, a liquid storage tank 200 and a controller 300;

[0032] Please refer again Figures 1 to 3 A test barrel 110 is installed in the middle of the top of the base 100, and lifting cylinders 120 are installed on both sides of the top of the base 100. A top plate 130 is installed on the top of the lifting cylinder 120. An elastic member 140 is installed in the middle of the bottom of the top plate 130. The elastic member 140 is a return spring. A connecting rod 150 is installed at the bottom of the elastic member 140. A reaction plate 160 is installed at the bottom of the connecting rod 150. A pressure sensor 170 is installed between the connecting rod 150 and the reaction plate 160. The bottom of the base 100 Supporting legs are installed at the four corners, and suction cups are installed at the bottom of the supporting legs. Furthermore, the base 100 is used to carry the test barrel 110, the test barrel 110 is used to carry the soil to be tested, the lifting cylinder 120 is used to carry the top plate 130 and adjust the height, the top plate 130 is used for the elastic member 140, the elastic member 140 is used to carry the connecting rod 150, the connecting rod 150 is used to carry the reaction plate 160, the reaction plate 160 is used to contact with the soil sample to be tested, and the pressure sensor 170 is used for pressure detection;

[0033] Please refer again Figures 1 to 3: The liquid storage tank 200 is installed on one side of the top of the top plate 130, and a liquid replenishing port is installed on the top of the liquid storage tank 200. A drain pipe 210 is installed at the bottom of the liquid storage tank 200 through the top plate 130, and a metering battery valve 220 is installed at the bottom of the drain pipe 210. A liquid infusion pipe 230 is installed at the bottom of the metering battery valve 220. The bottom of the liquid infusion pipe 230 is connected to the reaction plate 160 and extends through the reaction plate 160 to the inside of the test barrel 110. The top of the reaction plate 160 is provided with an infusion hole matched with the liquid infusion pipe 230. Further, the liquid storage tank 200 is used to store water, the drain pipe 210 is used to discharge liquid, the metering solenoid valve is used to quantitatively discharge liquid, and the liquid infusion pipe 230 is used for liquid transportation;

[0034] Please refer again Figures 1 to 3 : A controller 300 is installed on the front surface of the top plate 130, a display unit 310 is installed on the front surface of the controller 300, and the display unit 310 is electrically connected to the pressure sensor 170, the display unit 310 includes a display screen and a speaker, the controller 300 is connected to an external power supply through a wire, and the controller 300 and the display unit 310 are used for receiving and displaying.

[0035] Working principle: During the use of the utility model, the top plate 130 is driven to move up and down by the lifting cylinder 120, and the top plate 130 drives the reaction plate 160 to move up and down, so that the height of the reaction plate 160 can be adjusted conveniently, with high flexibility and a wide range of applications; in addition, through the cooperation of the liquid storage tank 200, the discharge pipe 210, the metering solenoid valve and the infusion pipe 230, quantitative liquid injection is convenient, and the injection method is to inject water from above, which can ensure sufficient absorption of the soil and help improve the accuracy of the inspection.

[0036] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An expansive soil expansion force testing device, characterized in that: It comprises a base (100), a liquid storage tank (200) and a controller (300); in, A test barrel (110) is arranged in the middle of the top of the base (100), lifting cylinders (120) are arranged on both sides of the top of the base (100), a top plate (130) is arranged on the top of the lifting cylinder (120), an elastic member (140) is arranged in the middle of the bottom of the top plate (130), a connecting rod (150) is arranged at the bottom of the elastic member (140), a reaction plate (160) is arranged at the bottom of the connecting rod (150), and a pressure sensor (170) is arranged between the connecting rod (150) and the reaction plate (160); The liquid storage tank (200) is arranged on one side of the top of the top plate (130); a liquid discharge pipe (210) is arranged at the bottom of the liquid storage tank (200) through the top plate (130); a metering battery valve (220) is arranged at the bottom of the liquid discharge pipe (210); a liquid infusion pipe (230) is arranged at the bottom of the metering battery valve (220); the bottom of the liquid infusion pipe (230) is connected to the reaction plate (160) and passes through the reaction plate (160) to extend to the inside of the test barrel (110); A controller (300) is disposed on the front surface of the top plate (130), a display unit (310) is disposed on the front surface of the controller (300), and the display unit (310) is electrically connected to the pressure sensor (170).

2. The expansive soil expansion force testing device according to claim 1, characterized in that: The four corners of the bottom of the base (100) are provided with supporting legs, and the bottom of the supporting legs is provided with a suction cup.

3. The expansive soil expansion force testing device according to claim 1, characterized in that: The elastic member (140) is a return spring.

4. The expansive soil expansion force testing device according to claim 1, characterized in that: The top of the liquid storage tank (200) is provided with a liquid replenishing port.

5. The expansive soil expansion force testing device according to claim 1, characterized in that: The top of the reaction plate (160) is provided with an infusion hole matched with the infusion tube (230).

6. The expansive soil expansion force testing device according to claim 1, characterized in that: The display unit (310) comprises a display screen and a speaker.

7. The expansive soil expansion force testing device according to claim 1, characterized in that: The controller (300) is connected to an external power source via a wire.

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