Expansive soil equilibrium isotherm measuring device

Abstract

According to the technical scheme, the expansive soil equilibrium isotherm measuring device is characterized in that the expansive soil equilibrium isotherm measuring device comprises a workbench, a measuring chamber is fixedly installed on the top face of the workbench, a mounting plate is arranged in the measuring chamber, a mounting block is fixedly installed on the top face of the mounting plate, and a containing disc is arranged on the top face of the mounting block; an air duct opening is formed in one side of the measuring chamber, an air pipe is fixedly arranged in the air duct opening in a sleeved mode, and a humidifying frame is fixedly installed on the inner bottom face of the air pipe; after a sealing plate and a starting device are arranged, when air in a measuring chamber needs to be humidified, a first driving motor starts to work, so that a two-way screw rod rotates, the covering area of the two-way screw rod on the top surface of a humidifying box is changed, and the humidity condition in the measuring chamber is accurately controlled, so that different environment requirements of expansive soil equilibrium isotherm measurement are met; the humidity of the measuring chamber can quickly reach a target value, the experiment waiting time is greatly shortened, and the experiment efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental geotechnical engineering, and particularly relates to a swelling soil balance isotherm measuring device. BACKGROUND

[0002] Swelling soil is widely distributed in China. Its most typical water absorption and swelling, shrinkage under the condition of water loss have important influence on the engineering field, and have certain negative effect on the safety and stability of geotechnical engineering, road engineering, water conservancy engineering and the like. Meanwhile, the low permeability and soil-water characteristics under the condition of high suction of swelling soil also enable the sodium-based montmorillonite in the swelling soil to be used as a base material of buffer material and backfill material of the barrier system of the high-level radioactive waste deep geological disposal repository project in China.

[0003] For example, the Chinese patent with publication number CN218917109U discloses a swelling soil balance isotherm measuring device and measuring method, which comprises an environment chamber, an automatic humidity control system, an automatic temperature control system and a distance measuring system, and the environment chamber contains a soil sample to be measured; the automatic humidity control system is connected with the environment chamber and transports humidity to the environment chamber, the automatic humidity control system comprises dry gas generating devices and humidity generating devices which are independent of each other, and a flow regulating device for controlling the mixing ratio of dry gas and humidity, so as to adjust the relative humidity of the environment chamber; the automatic temperature control system comprises a heating element wrapped outside the environment chamber, so as to adjust the temperature of the environment chamber; the distance measuring system is located in the environment chamber and is arranged at intervals with the soil sample to be measured, so as to detect the swelling deformation of the soil sample to be measured; the present application can realize the measurement and analysis of the balance isotherm, and achieve the purpose of simulating the desorption deformation measurement and analysis of swelling soil under various different environments.

[0004] However, the current swelling soil balance isotherm measuring device and measuring method still has some deficiencies, for example: the humidity adjusting response speed of the device is slow, when the experiment requires rapid switching of humidity conditions, it is difficult to reach the target humidity and stabilize in a short time, which affects the experimental efficiency and data accuracy. SUMMARY

[0005] In view of the deficiencies in the prior art, the present application provides a swelling soil balance isotherm measuring device, which solves the problems mentioned in the background art.

[0006] The above technical purpose of the present application is realized by the following technical scheme:

[0007] The utility model provides an expansive soil balance isotheral line measuring device, including the workbench, the top surface of workbench is fixedly installed with the measuring chamber, the inside of measuring chamber is provided with the mounting plate, the top surface of mounting plate is fixedly installed with the mounting block, the top surface of mounting block is provided with the placement tray, one side of measuring chamber is opened wind channel mouth, the inside of wind channel mouth is fixedly sleeved with the air pipe, the inside bottom surface of air pipe is fixedly installed with the humidification frame, the inside bottom surface of humidification frame is fixedly installed with two humidification boxes, adjusting assembly is arranged on the top surface of humidification box for adjusting air humidity, adjusting assembly includes a plurality of sealing plates, a plurality of sealing plates are arranged on the top surface of two humidification boxes respectively, both sides of air pipe are opened telescopic mouth, sealing plate passes through telescopic mouth and extends to outside, one side of sealing plate is fixedly installed with the connecting block, one side of connecting block is fixedly installed with the connecting plate, the top surface of air pipe is fixedly installed with the fixed plate, one side of fixed plate is rotatably installed with the bidirectional screw rod, the bidirectional screw rod is threadedly connected with the connecting plate, the top surface of air pipe is fixedly installed with the first drive motor, the shaft of first drive motor is fixedly sleeved with the first pulley, the outside of bidirectional screw rod is fixedly sleeved with the second pulley, the outside of first pulley and second pulley is provided with the belt, during operation, the opening size of humidification box is controlled to the sealing plate through the bidirectional screw rod, the air humidity that the air channel enters into the measuring chamber can be accurately adjusted, so that the test of different humidity can be carried out quickly.

[0008] Preferably, the top surface of the humidification box is fixedly installed with two limiting frames.

[0009] Preferably, the inside bottom surface of the air pipe is fixedly installed with a turbulence frame, and the inside one side of the turbulence frame is fixedly installed with a plurality of turbulence plates.

[0010] Preferably, the inside top surface of the air pipe is fixedly installed with a humidity sensor, one side of the measuring chamber is fixedly installed with a PLC controller, and the PLC controller is electrically connected with the humidity sensor and the first drive motor.

[0011] Preferably, one side of the inside of the measuring chamber is fixedly installed with a heating plate, one side of the inside of the measuring chamber is inlaid with a semiconductor refrigeration block, one side of the inside of the measuring chamber is fixedly installed with a temperature sensor, one side of the measuring chamber is fixedly installed with a temperature controller, and the temperature controller is electrically connected with the PLC controller.

[0012] Preferably, the bottom surface of the mounting block is opened with a mounting hole, the inside of the mounting hole is fixedly installed with a second drive motor, and the shaft of the second drive motor is fixedly connected with the placement tray.

[0013] Preferably, two electric push rods are fixedly installed on one side of the inside of the measuring chamber, two limiting grooves are formed in the bottom surface of the measuring chamber, two limiting blocks are fixedly installed on the bottom surface of the mounting plate, and the limiting blocks and the limiting grooves are slidably sleeved together.

[0014] Preferably, an installation groove is formed in the top surface of the placing disc, a weight sensor is fixedly installed on the inside bottom surface of the installation groove, and the weight sensor is electrically connected with the PLC controller.

[0015] In summary, the present application mainly has the following advantages:

[0016] By setting the sealing plate, the swelling soil sample is placed in the placing disc on the mounting plate in the measuring chamber, after the device is started, when it is necessary to humidify the air in the measuring chamber, the first driving motor starts to work, the first pulley fixedly sleeved on the shaft thereof rotates, the first pulley drives the second pulley to rotate through the belt, the second pulley is fixed on the bidirectional screw rod, and the bidirectional screw rod is driven to rotate, in the process of rotating of the bidirectional screw rod, the connecting plate moves along the direction of the screw rod, the connecting plate drives the connecting block and the sealing plate to move, the sealing plate passes through the telescopic openings on the two sides of the air pipe, when the sealing plate moves, the covering area of the sealing plate on the top surface of the humidifying box is changed, as the sealing plate is gradually opened, the contact area between the moisture in the humidifying box and the air is increased, the moisture evaporation is accelerated, more water vapor enters the air pipe, and the air pipe is sent into the measuring chamber from the air duct opening, so that the humidity in the measuring chamber is improved, when it is necessary to reduce the humidification amount, the first driving motor reversely rotates, the bidirectional screw rod drives the sealing plate to reversely move, and the humidifying box is gradually covered, so that the moisture evaporation amount is reduced, and the humidity increasing speed in the measuring chamber is reduced, when the humidified air flows through the spoiler, the airflow is divided and turned, a turbulent vortex is formed, the air with different humidities is fully mixed, the humidity sensor can rapidly convert the humidity signal into an electric signal and transmit the electric signal to the PLC controller, a reliable data basis is provided for subsequent humidity adjustment, the humidity condition in the measuring chamber is accurately controlled, different environmental requirements of the swelling soil balance isotherm measurement are met, the humidity in the measuring chamber rapidly reaches the target value, the experimental waiting time is greatly shortened, and the experimental efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of the three-dimensional structure of the present application;

[0018] Figure 2 is a schematic view of the mounting plate structure of the present application;

[0019] Figure 3 is a schematic view of the measuring chamber structure of the present application;

[0020] Figure 4 is a schematic view of the humidifying frame structure of the present application;

[0021] Figure 5 is a schematic diagram of the spoiler structure of the present application;

[0022] Figure 6 is a schematic diagram of the mounting block structure of the present application.

[0023] Reference signs: 1, workbench; 2, measuring chamber; 3, mounting plate; 4, mounting block; 5, placing disc; 6, air duct opening; 7, air pipe; 8, humidifying rack; 9, humidifying box; 10, sealing plate; 11, telescopic opening; 12, connecting block; 13, connecting plate; 14, fixed plate; 15, bidirectional screw rod; 16, first belt pulley; 17, first driving motor; 18, second belt pulley; 19, belt; 20, limiting frame; 21, spoiler rack; 22, spoiler; 23, humidity sensor; 24, heating plate; 25, semiconductor refrigeration block; 26, temperature sensor; 27, temperature controller; 28, PLC controller; 29, mounting hole; 30, second driving motor; 31, mounting groove; 32, weight sensor; 33, electric push rod; 34, limiting groove; 35, limiting block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0025] Reference Figures 1-6The utility model provides an expansive soil balance isotheral line measuring device, include: workstation 1, the top surface fixed mounting of workstation 1 has the measuring chamber 2, the inside of measuring chamber 2 is provided with mounting plate 3, the top surface fixed mounting of mounting plate 3 has installation block 4, and the top surface of installation block 4 is provided with the placement tray 5, the one side of measuring chamber 2 is opened with air duct mouth 6, and the inside fixed cover of air duct mouth 6 is provided with air pipe 7, and the inside bottom surface fixed mounting of air pipe 7 has two humidification box 9 of humidification frame 8, adjusting assembly, adjusting assembly sets up at the top surface of humidification box 9 for adjusting air humidity, and adjusting assembly includes a plurality of sealing plate 10, and a plurality of sealing plate 10 sets up at the top surface of two humidification box 9 respectively, and the both sides of air pipe 7 are all opened with telescopic mouth 11, and sealing plate 10 passes through telescopic mouth 11 and extends to outside, and one side fixed mounting of sealing plate 10 has connecting block 12, and one side fixed mounting of connecting block 12 has connecting plate 13, and the top surface fixed mounting of air pipe 7 has fixed plate 14, and one side rotationally installed of fixed plate 14 has two -way screw rod 15, and two -way screw rod 15 is connected together in screw thread with connecting plate 13, and the top surface fixed mounting of air pipe 7 has first drive motor 17, and the shaft fixed cover of first drive motor 17 has first pulley 16, and the outside fixed cover of two -way screw rod 15 has second pulley 18, and the outside of first pulley 16 and second pulley 18 is provided with belt 19, during operation, by two -way screw rod 15, drive sealing plate 10 to the opening size of humidification box 9 is regulated, so that the air humidity that air duct enters into measuring chamber 2 can be accurately adjusted, so that the test of different humidity can be quickly carried out.

[0026] By setting the sealing plate 10, the swelling soil sample is placed in the placing disc 5 on the mounting plate 3 in the measuring chamber 2, after starting the device, when it is necessary to humidify the air in the measuring chamber 2, the first driving motor 17 starts to work, the first belt pulley 16 fixedly sleeved on the shaft thereof rotates, the second belt pulley 18 is driven to rotate by the first belt pulley 16 through the belt 19, the second belt pulley 18 is fixed on the bidirectional screw rod 15, and then the bidirectional screw rod 15 rotates, in the rotating process of the bidirectional screw rod 15, the connecting plate 13 moves along the screw rod direction, the connecting plate 13 drives the connecting block 12 and the sealing plate 10 to move, the sealing plate 10 passes through the telescopic opening 11 on the two sides of the air pipe 7, when the sealing plate 10 moves, the covering area of the humidifying box 9 top surface is changed, as the sealing plate 10 gradually opens, the water contact area in the humidifying box 9 increases, the water evaporation is accelerated, more water vapor enters the air pipe 7, and the air pipe 7 is used to send the air in the air duct 6 into the measuring chamber 2, so that the humidity in the measuring chamber 2 is increased, when it is necessary to reduce the humidification amount, the first driving motor 17 reversely rotates, the bidirectional screw rod 15 drives the sealing plate 10 to reversely move, the humidifying box 9 is gradually covered, the water evaporation amount is reduced, the humidity increasing speed in the measuring chamber 2 is reduced, the humidity condition in the measuring chamber 2 is accurately controlled, different environment requirements of the swelling soil balance isotherm measurement are met, the humidity in the measuring chamber 2 rapidly reaches the target value, the experimental waiting time is greatly shortened, and the experimental efficiency is improved.

[0027] As a further scheme of the present application, the top surface of the humidifying box 9 is fixedly provided with two limiting racks 20.

[0028] By setting the limiting rack 20, the movement path of the sealing plate 10 is constrained, the displacement thereof in the direction perpendicular to the movement direction is limited, the sealing plate 10 can only move along the designed straight track, the sealing plate 10 can stably fit the top surface of the humidifying box 9, the unexpected change of the opening area of the humidifying box 9 caused by shaking is avoided, and then the precision of the humidity adjustment is further improved, and the accuracy of the measurement data is ensured.

[0029] As a further scheme of the present application, the inner bottom surface of the air pipe 7 is fixedly provided with a turbulence rack 21, and a plurality of turbulence plates 22 are fixedly arranged on one side of the turbulence rack 21.

[0030] By setting the turbulence plate 22, when the humidified air flows through the turbulence plate 22, the airflow is divided and turned, a turbulent vortex is formed, and the air of different humidities is fully mixed.

[0031] As a further scheme of the present application, the inner top surface of the air pipe 7 is fixedly provided with a humidity sensor 23, one side of the measuring chamber 2 is fixedly provided with a PLC controller 28, and the PLC controller 28 is electrically connected with the humidity sensor 23 and the first driving motor 17.

[0032] By setting the humidity sensor 23, the humidity sensor 23 can quickly convert the humidity signal into an electrical signal and transmit it to the PLC controller 28, providing a reliable data basis for subsequent humidity adjustment, ensuring the accuracy and timeliness of the humidity data during the entire measurement process, allowing researchers to more clearly and accurately understand the characteristics of the expansive soil under different humidity conditions.

[0033] As a further scheme of the present application, the inside of the measuring chamber 2 is fixedly installed with a heating plate 24, the inside of the measuring chamber 2 is inlaid with a semiconductor refrigeration block 25, the inside of the measuring chamber 2 is fixedly installed with a temperature sensor 26, one side of the measuring chamber 2 is fixedly installed with a temperature controller 27, and the temperature controller 27 is electrically connected with the PLC controller 28.

[0034] By setting the heating plate 24, the temperature sensor 26 fixedly installed in the measuring chamber 2 can monitor the temperature change in the measuring chamber 2 in real time and accurately, when the experiment is carried out, the PLC controller 28 comprehensively judges the environmental state in the measuring chamber 2 according to the data feedback by the humidity sensor 23 and the temperature sensor 26, and cooperates with the temperature controller 27 to intelligently control the heating plate 24 and the semiconductor refrigeration block 25, according to different temperature conditions, the physical and chemical properties of the expansive soil are more stable, the water absorption and expansion, water loss and shrinkage and other characteristics can be more truly and accurately reflected, so that the equilibrium isotherm data obtained by the experiment.

[0035] As a further scheme of the present application, the bottom surface of the mounting block 4 is provided with a mounting hole 29, and the inside of the mounting hole 29 is fixedly installed with a second driving motor 30, and the shaft of the second driving motor 30 is fixedly connected with the placing disc 5.

[0036] By setting the second driving motor 30, the second driving motor 30 drives the placing disc 5 to rotate, so that the soil sample can continuously rotate during the measurement process, and the various parts of the soil sample can be uniformly exposed to the temperature and humidity environment in the measuring chamber 2, avoiding local overheating, excessive humidity or uneven heating and cooling.

[0037] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An apparatus for measuring the swelling soil equilibrium isotherm, characterized by, Include: Workbench (1), the top surface of the workbench (1) is fixedly installed with a measuring chamber (2), the inside of the measuring chamber (2) is provided with a mounting plate (3), the top surface of the mounting plate (3) is fixedly installed with a mounting block (4), and the top surface of the mounting block (4) is provided with a placing disc (5); A wind channel opening (6) is formed in one side of the measuring chamber (2), a wind pipe (7) is fixedly sleeved in the inside of the wind channel opening (6), a humidifying frame (8) is fixedly installed on the inside bottom surface of the wind pipe (7), and two humidifying boxes (9) are fixedly installed on the inside bottom surface of the humidifying frame (8); An adjusting assembly is arranged on the top surface of the humidifying box (9) and is used for adjusting air humidity, the adjusting assembly comprises a plurality of sealing plates (10), the sealing plates (10) are respectively arranged on the top surfaces of the two humidifying boxes (9), the two sides of the wind pipe (7) are provided with telescopic openings (11), the sealing plates (10) pass through the telescopic openings (11) and extend to the outside, one side of the sealing plate (10) is fixedly installed with a connecting block (12), one side of the connecting block (12) is fixedly installed with a connecting plate (13), a fixed plate (14) is fixedly installed on the top surface of the wind pipe (7), a bidirectional screw rod (15) is rotatably installed on one side of the fixed plate (14), the bidirectional screw rod (15) is threadedly connected with the connecting plate (13), a first driving motor (17) is fixedly installed on the top surface of the wind pipe (7), a first belt pulley (16) is fixedly sleeved on the shaft of the first driving motor (17), a second belt pulley (18) is fixedly sleeved on the outside of the bidirectional screw rod (15), the outside of the first belt pulley (16) and the second belt pulley (18) is provided with a belt (19), during operation, the opening size of the humidifying box (9) is controlled by the bidirectional screw rod (15) and the sealing plate (10), so that the air humidity in the measuring chamber (2) can be accurately adjusted, so that different humidity tests can be quickly performed.

2. The device for measuring the swelling soil isochore according to claim 1, characterized in that, Two limiting frames (20) are fixedly installed on the top surface of the humidifying box (9).

3. The device for measuring the swelling pressure equilibrium isotherm of a soil according to claim 1, characterized in that, A turbulence frame (21) is fixedly installed on the inside bottom surface of the wind pipe (7), and a plurality of turbulence plates (22) are fixedly installed on one side of the inside of the turbulence frame (21).

4. The device for measuring the swelling pressure equilibrium isotherm of a soil according to claim 1, characterized in that, A humidity sensor (23) is fixedly installed on the inside top surface of the wind pipe (7), a PLC controller (28) is fixedly installed on one side of the measuring chamber (2), and the PLC controller (28) is electrically connected with the humidity sensor (23) and the first driving motor (17).

5. An apparatus for measuring the swelling pressure equilibrium isotherm of a soil according to claim 4, wherein A heating plate (24) is fixedly installed on one side of the inside of the measuring chamber (2), a semiconductor refrigeration block (25) is inlaid on one side of the inside of the measuring chamber (2), a temperature sensor (26) is fixedly installed on one side of the inside of the measuring chamber (2), and a temperature controller (27) is fixedly installed on one side of the measuring chamber (2), and the temperature controller (27) is electrically connected with the PLC controller (28).

6. The device for measuring the swelling pressure equilibrium isotherm of a soil according to claim 1, characterized in that, The bottom surface of the mounting block (4) is provided with a mounting hole (29), and a second driving motor (30) is fixedly installed in the mounting hole (29). The shaft of the second driving motor (30) is fixedly connected with the placement disc (5).

7. The device for measuring the swelling pressure equilibrium isotherm of a soil according to claim 4, characterized in that, Two electric push rods (33) are fixedly installed on one side of the inside of the measuring chamber (2). The bottom surface of the measuring chamber (2) is provided with two limiting grooves (34). Two limiting blocks (35) are fixedly installed on the bottom surface of the mounting plate (3). The limiting blocks (35) are slidably sleeved with the limiting grooves (34).

8. The device for measuring the swelling pressure equilibrium isotherm of a soil according to claim 1, characterized in that, The top surface of the placement disc (5) is provided with a mounting groove (31). A weight sensor (32) is fixedly installed on the inside bottom surface of the mounting groove (31). The weight sensor (32) is electrically connected with the PLC controller (28).

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