Ventilation carbonization test equipment in soil stirring process

Abstract

The invention provides ventilation carbonization test equipment in a soil stirring process, and relates to the technical field of geotechnical test equipment. The device comprises a box body, a soil containing barrel, a stirring unit, a carbon dioxide introducing unit and an environment adjusting unit, an operation cavity capable of being closed is formed in the box body, the soil containing barrel is placed in the operation cavity, the stirring unit is arranged in the operation cavity and can stretch into an inner cavity of the soil containing barrel, and a gas dispersing structure is arranged on the soil containing barrel; the carbon dioxide introducing unit is communicated with the gas dispersing structure, carbon dioxide gas introduced by the carbon dioxide introducing unit can enter the inner cavity of the soil containing barrel through the gas dispersing structure, and the environment adjusting unit is communicated with the operation cavity. According to the equipment, carbon dioxide gas can be introduced while the soil body is stirred, the operation effect of stirring while ventilating is achieved, the soil body is carbonized, meanwhile, the environment temperature, humidity, CO2 concentration and CO2 ventilating flow can be adjusted, and therefore the requirements of various different forms of soil body stirring ventilating carbonization tests are met.

Description

Technical Field

[0001] The invention relates to the technical field of geotechnical testing equipment, in particular to a ventilation carbonization testing equipment in a soil mixing process. Background Art

[0002] Concrete carbonation test chamber is a device suitable for measuring the carbonation depth of concrete specimens in a CO2 gas medium with a certain concentration (within 20%) under specified temperature and humidity conditions.

[0003] Concrete carbonation test chambers are generally divided into three categories. The first category is the carbonation chamber, which can control the range or constant temperature, humidity and CO2 concentration; the second category is the test chamber, generally called an artificial environment chamber, reaction chamber or sealed chamber, which can usually only be filled with CO2 gas and cannot control temperature and humidity; the third category is the test reactor, which is characterized by being able to apply a higher CO2 gas pressure to accelerate the carbonization reaction efficiency, but cannot control temperature and humidity.

[0004] During long-term use, alkaline substances in concrete will react with CO2 in the air to reduce alkalinity. Based on this, concrete carbonization tests are conducted in scientific research. According to the equipment used in the test, the concrete carbonization is to prepare the sample first, fix it into shape, and then put it into the carbonization box, and set the temperature, humidity and CO2 concentration. Therefore, the principle of the concrete carbonization box is a box that can control temperature, humidity and concentration.

[0005] When soil carbonization is applied in actual projects, there are usually two construction processes. The first is to mix and compact the soil first, and at the same time, buried pipes must be laid in advance. After the soil is compacted, CO2 gas is passed to carbonize the soil. The second is to directly introduce CO2 gas during the mixing of the soil, so that the soil can be carbonized during the mixing process, accelerating the carbonization of the soil and achieving the purpose of shortening the construction time.

[0006] For the first construction process, the existing carbonization box can be used to study soil carbonization, and the temperature, humidity and CO2 concentration can be controlled to meet the experimental requirements, that is, first make a molded sample, and then put it into the carbonization box for carbonization. However, for the second construction process, there is currently no suitable carbonization box equipment, which cannot meet the requirements of aeration and carbonization of the soil during the mixing process. Summary of the invention

[0007] The purpose of the present invention is to provide a ventilation carbonization test device during soil mixing to solve the technical problem that the carbonization box equipment in the prior art cannot meet the requirements of ventilation carbonization of soil during mixing. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A ventilation carbonization test device during soil mixing comprises a box, a soil bucket, a stirring unit, a carbon dioxide introduction unit and an environmental adjustment unit. A closable working cavity is arranged inside the box, the soil bucket is placed in the working cavity, the stirring unit is arranged in the working cavity and can extend into the inner cavity of the soil bucket, a gas dispersion structure is arranged on the soil bucket, the carbon dioxide introduction unit is connected with the gas dispersion structure and the carbon dioxide gas introduced therein can enter the inner cavity of the soil bucket through the gas dispersion structure, and the environmental adjustment unit is connected with the working cavity.

[0010] Preferably, the soil barrel includes a base, a three-valve membrane, an upper pressure plate, a pull rod and a fixed throat hoop, the base is detachably connected to the bottom surface of the working chamber, a circular hole groove is provided on the base, the three-valve membrane is placed in the circular hole groove, the upper pressure plate is placed on the top of the three-valve membrane and is detachably connected to the base through a plurality of the pull rods, the fixed throat hoop is detachably connected to the outside of the three-valve membrane, and the gas dispersion structure includes a bottom gas dispersion portion, the bottom gas dispersion portion is arranged on the base and is connected to the carbon dioxide introduction unit.

[0011] Preferably, the bottom surface air diffusion portion includes a first air pipe and a strip air path, a plurality of the strip air paths are evenly distributed along the circumferential direction of the base and all of the strip air paths are converged and connected at the center of the base, a plurality of first air diffusion holes are evenly opened on each of the strip air paths, the first air diffusion holes are communicated with the inner cavity of the soil bucket, one end of the first air pipe is connected with the carbon dioxide introduction unit, and the other end of the first air pipe penetrates into the interior of the base and is communicated with the convergent ends of all the strip air paths.

[0012] Preferably, the gas diffusion structure further includes a side gas diffusion part, which is connected to the upper pressure plate and can extend into the inner cavity of the soil bucket, and the side gas diffusion part is in communication with the carbon dioxide introduction unit.

[0013] Preferably, the side air diffusion part includes a connecting piece and a vertical rod, and a plurality of the connecting pieces are evenly connected to the upper pressure plate along the circumferential direction of the upper pressure plate. The top end of the vertical rod is connected to the connecting piece and communicated with the carbon dioxide introduction unit, and a plurality of second air diffusion holes are evenly opened on the vertical rod.

[0014] Preferably, the stirring unit includes a driving motor, a fixed plate, a stirring shaft assembly and a fixed bracket, the driving motor is connected to the fixed bracket, the output shaft of the driving motor is connected to the fixed plate, the fixed plate is connected to the two stirring shaft assemblies, and the driving motor can drive the fixed plate and the two stirring shaft assemblies to rotate when started.

[0015] Preferably, the stirring unit also includes a fixed rod, a first gear and a second gear, the first gear is connected to the fixed bracket through the two fixed rods, the stirring shaft assembly includes a stirring shaft body and a stirring blade, the stirring blade is arranged on the stirring shaft body, the stirring shaft body is movably connected to the fixed plate through a bearing, the top end of the stirring shaft body is connected to the second gear, and the second gear is meshingly connected to the first gear.

[0016] Preferably, the carbon dioxide introduction unit comprises a gas cylinder, a pressure regulating valve, a flow meter and a ventilation pipeline, the gas cylinder is connected to the gas dispersion structure through the ventilation pipeline, and the pressure regulating valve and the flow meter are arranged on the ventilation pipeline.

[0017] Preferably, the environmental conditioning unit includes a humidity regulating mechanism, a temperature cooling mechanism and a temperature raising mechanism. The humidity regulating mechanism and the temperature cooling mechanism are both placed inside the box and connected to the working cavity through pipelines. The temperature raising mechanism is placed inside the box and connected to the working cavity through air holes.

[0018] Preferably, the box is provided with a glove hole and an observation window on the front of the working cavity, and the box is provided with a door body on the side of the working cavity, and closing the door body can make the working cavity closed.

[0019] The beneficial effects of the present invention are as follows: since a stirring unit and a carbon dioxide introduction unit are provided at the same time, and a gas dispersion structure capable of introducing carbon dioxide gas is provided on the soil holding barrel, the stirring unit, the carbon dioxide introduction unit and the gas dispersion structure can cooperate with each other, so that during the soil stirring process, the aeration carbonization test equipment can introduce carbon dioxide gas while stirring the soil, thereby achieving an operation effect of stirring while aerating, and carbonizing the soil; at the same time, the environmental temperature, humidity, CO2 concentration and CO2 ventilation flow rate can be adjusted by the carbon dioxide introduction unit and the environmental adjustment unit, thereby meeting the requirements of various forms of soil stirring aeration carbonization tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 It is a detailed structural diagram of the working chamber of the present invention;

[0023] Figure 3 It is a detailed structural diagram of the humidity regulating mechanism and the temperature cooling mechanism of the present invention;

[0024] Figure 4 It is a detailed structural diagram of the temperature raising mechanism of the present invention;

[0025] Figure 5 It is a three-dimensional structural diagram of the soil storage bucket of the present invention without the side air dispersion part;

[0026] Figure 6 is a structural diagram of the base of the present invention;

[0027] Figure 7 It is a detailed structural diagram of the strip-shaped gas path of the present invention;

[0028] Figure 8 It is a cross-sectional structural diagram of the base of the present invention;

[0029] Fig. 9 It is a detailed structural diagram of the soil tank and the stirring unit of the present invention;

[0030] Fig.10 A top view of the soil storage bucket of the present invention is provided with a side air dispersion portion;

[0031] Fig.11 is a detailed structural diagram of the stirring unit of the present invention;

[0032] Fig.12 It is a detailed structural diagram of the carbon dioxide introduction unit of the present invention;

[0033] In the figure, 1, box body; 11, working chamber; 12, glove hole; 13, observation window; 14, door body;

[0034] 2. Soil bucket; 21. Base; 22. Three-valve membrane; 23. Upper pressure plate; 24. Pull rod; 25. Fixed throat hoop;

[0035] 3. stirring unit; 31. driving motor; 32. fixing plate; 33. stirring shaft assembly; 331. stirring shaft body; 332. stirring blade; 34. fixing bracket; 35. fixing rod; 36. first gear; 37. second gear;

[0036] 4. Carbon dioxide introduction unit; 41. Gas cylinder; 42. Pressure regulating valve; 43. Flow meter; 44. Ventilation pipeline;

[0037] 5. Environmental adjustment unit; 51. Humidity adjustment mechanism; 52. Temperature cooling mechanism; 53. Temperature raising mechanism;

[0038] 6. Air diffusion structure; 61. Bottom air diffusion part; 611. First air pipe; 612. Strip air path; 6121. First air diffusion hole; 62. Side air diffusion part; 621. Connector; 622. Vertical rod; 6221. Second air diffusion hole. DETAILED DESCRIPTION

[0039] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate positions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0042] Reference Figures 1 to 12The present invention provides a ventilation carbonization test device during soil mixing, comprising a box 1, a soil bucket 2, a mixing unit 3, a carbon dioxide introduction unit 4 and an environment adjustment unit 5;

[0043] The box 1 is provided with a closable working cavity 11, and the soil bucket 2 is placed in the working cavity 11. The soil and water used for the test are evenly mixed and placed in the inner cavity of the soil bucket 2.

[0044] The stirring unit 3 is arranged in the working cavity 11 and can extend into the inner cavity of the soil bucket 2. After the stirring unit 3 is started, the soil and water in the inner cavity of the soil bucket 2 can be fully and evenly stirred;

[0045] The soil barrel 2 is provided with a gas diffusion structure 6, and the carbon dioxide introduction unit 4 is connected to the gas diffusion structure 6. The carbon dioxide introduction unit 4 can be used to introduce carbon dioxide gas, and allow the carbon dioxide gas to enter the inner cavity of the soil barrel 2 through the gas diffusion structure 6, and fully integrate into the soil in the inner cavity of the soil barrel 2. At the same time, the carbon dioxide introduction unit 4 can also control the CO2 concentration and the ventilation flow rate of CO2, simulating the ventilation carbonization process during the mixing process;

[0046] The environmental adjustment unit 5 is connected to the working chamber 11. The environmental adjustment unit 5 can adjust the construction environment parameters inside the working chamber 11. The construction environment parameters mentioned here include but are not limited to temperature and humidity. Through the setting of the environmental adjustment unit 5, the ventilation carbonization process in the stirring process can be simulated according to actual use needs, and different construction environment parameters can be selected for experiments to obtain the optimal construction parameters and provide a reference for the actual process.

[0047] Since the stirring unit 3 and the carbon dioxide introduction unit 4 are provided at the same time, and a gas dispersion structure 6 for introducing carbon dioxide gas is provided on the soil barrel 2, the stirring unit 3, the carbon dioxide introduction unit 4 and the gas dispersion structure 6 can cooperate with each other, so that the aeration carbonization test equipment can introduce carbon dioxide gas while stirring the soil during the soil stirring process, thereby achieving the operation effect of stirring while ventilating and carbonizing the soil. At the same time, the environmental temperature, humidity, CO2 concentration and CO2 ventilation flow rate can be adjusted by the carbon dioxide introduction unit 4 and the environmental adjustment unit 5, so as to meet the requirements of various forms of soil stirring aeration carbonization tests.

[0048] In addition, by providing a closable working chamber 11, the stirring area, the ventilation area and the test working area can be integrated together, making the structural design more reasonable.

[0049] As an optional embodiment, the soil bucket 2 includes a base 21, a three-valve membrane 22, an upper pressure plate 23, a pull rod 24 and a fixed throat hoop 25;

[0050] The base 21 is detachably connected to the bottom surface of the working chamber 11, preferably by bolts, so that the soil bucket 2 is easy to install and disassemble. During the operation, the soil bucket 2 can be connected to the bottom surface of the working chamber 11 to prevent the soil bucket 2 from shaking and moving during the stirring and ventilation process. After the operation is completed, the connection between the soil bucket 2 and the bottom surface of the working chamber 11 can be released and the soil bucket 2 can be taken out.

[0051] A circular hole is formed on the base 21, and the three-petal membrane 22 is placed in the circular hole;

[0052] The upper pressing plate 23 is placed on top of the three-valve membrane 22 and is detachably connected to the base 21 through a plurality of tie rods 24 to ensure a firm connection;

[0053] The fixed throat clamp 25 is detachably connected to the outer side of the three-valve membrane 22 to fix the three-valve membrane 22 .

[0054] The gas diffusion structure 6 preferably includes a bottom gas diffusion part 61, and the bottom gas diffusion part 61 preferably includes a first air pipe 611 and a strip gas path 612. The strip gas path 612 is arranged inside the base 21, and a plurality of strip gas paths 612 are evenly distributed along the circumferential direction of the base 21. The attached drawings of this embodiment preferably show a structural form when there are 12 strip gas paths 612, and all the strip gas paths 612 are converged and connected at the center of the base 21. A plurality of first gas diffusion holes 6121 are evenly opened on each strip gas path 612, and the first gas diffusion holes 6121 are connected to the inner cavity of the soil bucket 2. One end of the first air pipe 611 is connected to the carbon dioxide introduction unit 4, and the other end of the first air pipe 611 penetrates into the base 21 and is connected to the convergence ends of all the strip gas paths 612.

[0055] The carbon dioxide gas delivered by the carbon dioxide introduction unit 4 can enter the first air pipe 611 from one end of the first air pipe 611, and then evenly enter all the strip air paths 612 through the first air pipe 611. The carbon dioxide gas is evenly distributed to each strip air path 612, and finally evenly enters the inner cavity of the soil bucket 2 from each first air diffusion hole 6121 on each strip air path 612, and fully contacts with the soil.

[0056] As an optional embodiment, the gas diffusion structure 6 also includes a side gas diffusion part 62, and the side gas diffusion part 62 preferably includes a connecting piece 621 and a vertical rod 622. A plurality of connecting pieces 621 are evenly connected to the upper pressing plate 23 along the circumferential direction of the upper pressing plate 23. Each upper pressing plate 23 is connected to a vertical rod 622. The top of the vertical rod 622 is connected to the connecting piece 621 and is connected to the carbon dioxide introduction unit 4. The vertical rod 622 can extend into the inner cavity of the soil bucket 2. A plurality of second gas diffusion holes 6221 are evenly opened on the vertical rod 622, and the openings of the second gas diffusion holes 6221 are opened toward the center.

[0057] The carbon dioxide gas delivered by the carbon dioxide introduction unit 4 can enter each vertical rod 622, and then enter the inner cavity of the soil bucket 2 from the second diffusion hole 6221. Different from the bottom diffusion part 61 that introduces gas from the bottom, the side diffusion part 62 adopts a method of introducing gas from the side, which enriches the introduction form of carbon dioxide gas and can further improve the ventilation effect, so that the carbon dioxide gas can be introduced more fully.

[0058] As an optional embodiment, the stirring unit 3 includes a driving motor 31, a fixing plate 32, a stirring shaft assembly 33, a fixing bracket 34, a fixing rod 35, a first gear 36 and a second gear 37. The fixing bracket 34 is connected to the housing 1 and is located inside the working chamber 11. The driving motor 31 is connected to the fixing bracket 34. The fixing bracket 34 can support the driving motor 31. The output shaft of the driving motor 31 is connected to the fixing plate 32. There are two stirring shaft assemblies 33. The two stirring shaft assemblies 33 each include a stirring shaft body 331 and a stirring blade 332. The stirring blade 332 is arranged on the stirring shaft body 331. Each stirring shaft body 331 is movably connected to the fixing plate 32 through a bearing. The two stirring shaft assemblies 33 are symmetrically distributed. The first gear 36 is connected to the fixing bracket 34 through two fixing rods. The top of each stirring shaft body 331 is connected to a second gear 37, and the two second gears 37 are meshed with the first gear 36.

[0059] After the driving motor 31 is started, it can drive the fixed plate 32 and the two stirring shaft assemblies 33 to rotate, thereby driving the two stirring shaft assemblies 33 to rotate in a circumferential direction around the axis of the output shaft of the driving motor 31. At the same time, the second gear 37 at the top of each stirring shaft body 331 can rotate relative to the first gear 36, thereby driving the two stirring shaft bodies 331 to rotate relative to their own axes. Therefore, compared with the single-axis stirring stirring method in the existing equipment, multiple dual-axis stirring can be achieved, thereby achieving a more uniform and sufficient stirring effect, and at the same time, the stirring range can be expanded to cover the soil in the inner cavity of the soil bucket 2 in a larger range. The stirring unit 3 of the dual-axis stirring can cooperate with the carbon dioxide introduction unit 4 to achieve the operation effect of stirring while ventilating.

[0060] As an optional embodiment, the carbon dioxide introduction unit 4 includes a gas cylinder 41, a pressure regulating valve 42, a flow meter 43 and a ventilation pipeline 44. The gas cylinder 41 is connected to the gas dispersion structure 6 through the ventilation pipeline 44. The pressure regulating valve 42 and the flow meter 43 are arranged on the ventilation pipeline 44. The gas cylinder 41, the pressure regulating valve 42 and the flow meter 43 are preferably located outside the box 1;

[0061] The gas cylinder 41 stores CO2 gas, and the gas cylinder 41 can supply CO2 gas to the gas dispersion structure 6 inside the box body 1 through the ventilation pipeline 44. The pressure regulating valve 42 can control the gas pressure entering the soil body. In this embodiment, the gas supply pressure of the gas cylinder is preferably 5MPa, and the pressure regulating valve 42 can reduce the 5MPa gas pressure output by the gas cylinder 41 to 50-800kPa. Since CO2 is output from the liquid state in the gas cylinder 41 to the gas state, this process will result in a lower gas temperature due to heat absorption. Therefore, it is preferred to additionally set a heater at the pressure regulating valve 42 to heat the CO2 gas. The flow meter 43 can monitor the CO2 gas flow in real time, and can be connected to a computer using a media module to record real-time data in the computer.

[0062] In this embodiment, the concentration of CO2 gas has a significant impact on the carbonization process. The concentration of CO2 gas cylinders provided by gas cylinder manufacturers is greater than 99%. At the same time, when applied to actual construction, a large amount of CO2 is required, and gas cylinder 41 cannot meet the use demand. Therefore, CO2 gas is collected from thermal power plants. However, the concentration of CO2 gas collected from thermal power plants is generally lower than 99%, and the concentration is not constant. Therefore, in order to consider the influence of CO2 concentration on the carbonization process, the controllable CO2 concentration range of the ventilation carbonization test equipment is preferably 0.1-95%, with an accuracy of ±2%;

[0063] It is worth noting that in the present embodiment, in order to cooperate with the separate setting of the bottom air diffuser 61 and the side air diffuser 62, when the side air diffuser 62 needs to be set, the end of the ventilation pipeline 44 extending into the interior of the box body 1 can be divided into multiple air paths by a multi-way pipe fitting, so as to be respectively connected to the first air pipe 611 and all the vertical rods 622, thereby effectively meeting the test requirements under the premise of setting the side air diffuser 62.

[0064] As an optional implementation, the environment adjustment unit 5 includes a humidity adjustment mechanism 51 , a temperature cooling mechanism 52 and a temperature raising mechanism 53 .

[0065] The humidity regulating mechanism 51 is placed inside the box 1 and is connected to the working chamber 11 through a pipeline. The humidity regulating mechanism 51 can regulate the humidity inside the working chamber 11.

[0066] In this embodiment, the humidity adjustment mechanism 51 is preferably an ultrasonic humidifier, which can provide water vapor to the inside of the working chamber 11, thereby controlling the humidity inside the working chamber 11;

[0067] In this embodiment, taking Qinghai as an example, the atmospheric humidity ranges from 40% to 80% in a year, and the humidity in southern cities in my country is usually above 85%. In order to consider the impact of humidity on the carbonization process, the controllable humidity range of the ventilation carbonization test equipment is preferably 10-99%, with an accuracy of ±3%, and the standard curing humidity RH = 95% to cover all local humidity ranges.

[0068] The temperature cooling mechanism 52 is placed inside the box 1 and is connected to the working cavity 11 through a pipeline. The temperature cooling mechanism 52 can reduce the temperature inside the working cavity 11. In this embodiment, the temperature cooling mechanism 52 is preferably an air conditioner with a refrigeration function. The air conditioner can provide cold air to the inside of the working cavity 11, thereby reducing the temperature inside the working cavity 11.

[0069] The temperature raising mechanism 53 is placed inside the box 1 and is connected to the working cavity 11 through the air hole. The temperature raising mechanism 53 can raise the temperature inside the working cavity 11. In this embodiment, the temperature raising mechanism 53 is preferably a heating structure with a heating wire, which can deliver hot air to the inside of the working cavity 11, thereby raising the temperature inside the working cavity 11.

[0070] In this embodiment, considering that the lowest temperature for winter construction is -5°C and the highest temperature for summer construction can reach 40°C, and because high temperature will accelerate the carbonization process and speed up the carbonization construction process, in order to fully cover all test conditions, the controllable temperature range of the ventilation carbonization test equipment is preferably -10°C-60°C, with an accuracy of ±0.2°C.

[0071] As an optional embodiment, the box body 1 is provided with a glove hole 12 and an observation window 13 on the front of the working cavity 11, and gloves can be installed on the glove hole 12, so that the user can use the gloves to operate the inside of the working cavity 11, and can observe the inside of the working cavity 11 through the observation window 13;

[0072] The box body 1 is provided with a door body 14 which can be opened and closed on the side of the working chamber 11. By opening the door body 14, the soil bucket 2 can be taken out or placed, and the inside of the working chamber 11 can be inspected and maintained. By closing the door body 14, the working chamber 11 can form a closed working space, which is convenient for controlling the environmental parameters inside the working chamber 11, thereby realizing the operation.

[0073] In addition, a sensor for detecting the CO 2 concentration is preferably provided inside the working chamber 11 , so that the CO 2 concentration inside the working chamber 11 can be understood and mastered.

[0074] As an optional embodiment, it also includes a control unit and a control panel. The control unit is arranged inside the box 1. The control unit can be electrically connected to the drive motor 31, the pressure regulating valve 42, the flow meter 43, the humidity adjustment mechanism 51, the temperature cooling mechanism 52 and the temperature raising mechanism 53 to centrally control the above devices and mechanisms.

[0075] The control panel is arranged on the outer side of the box 1, and the control panel is preferably a touch screen, which is convenient for controlling the temperature, humidity and CO2 concentration, thereby ensuring that the temperature, humidity and CO2 concentration inside the box 1 are constant.

[0076] As an optional implementation, the box body 1 is preferably divided into three layers in the vertical direction, corresponding to the upper layer, the middle layer and the lower layer respectively. Correspondingly, the control unit and the control panel are located on the upper layer, the working chamber 11, the soil bucket 2, the stirring unit 3 and the temperature raising mechanism 53 are located in the middle layer, and the humidity regulating mechanism 51 and the temperature cooling mechanism 52 are located in the lower layer. Such an arrangement is conducive to the arrangement and layout of each unit and component, making the overall structural form inside the box body 1 more reasonable.

[0077] The operation process of the aeration carbonization test equipment during soil mixing specifically includes the following steps:

[0078] Step A: After the operator mixes the mixed soil (recommended dry mass is 3-10kg) and water evenly, the operator puts the mixed soil into the soil bucket 2, and then fixes the soil bucket 2 inside the working chamber 11 of the box body 1, and sets the stirring unit 3, and then connects the pipeline connected by the multi-way pipe fitting to the first air pipe 611 and the vertical rod 622 on the soil bucket 2 respectively, starts the driving motor 31, and selects and sets the appropriate stirring rate, and then closes the door 14, observes through the observation window 13 in front, and can use the glove hole 12 in front to perform internal operations when the driving motor 31 is stopped;

[0079] Step B: Operate the control panel to set various parameters, including the internal temperature of the box 1 (the setting range is -10°C to 60°C), humidity (the setting range is 10-99%), and CO2 concentration (the setting range is 0.1-95%). If the operator chooses not to modify the initial value, the device uses the default setting value, which is 20°C for temperature, 95% for humidity, and 10% for CO2 concentration;

[0080] Step C: Turn on the switch of the gas cylinder 41, observe the real-time monitoring data of the flow meter 43, and control the flow required for the test by operating the pressure regulating valve 42 to ventilate the soil;

[0081] Step D: After the test is completed, the carbonized soil material is taken out for mechanical, carbonization degree, pH value and other tests, the various properties of the carbonized soil material are measured, and the optimal stirring carbonization parameters are selected.

[0082] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A ventilation carbonization test equipment during soil mixing, characterized in that: The invention comprises a box (1), a soil bucket (2), a stirring unit (3), a carbon dioxide introduction unit (4) and an environment adjustment unit (5); the box (1) is provided with a closable working cavity (11); the soil bucket (2) is placed in the working cavity (11); the stirring unit (3) is arranged in the working cavity (11) and can extend into the inner cavity of the soil bucket (2); a gas dispersion structure (6) is arranged on the soil bucket (2); the carbon dioxide introduction unit (4) is connected to the gas dispersion structure (6) and the carbon dioxide gas introduced therein can enter the inner cavity of the soil bucket (2) through the gas dispersion structure (6); and the environment adjustment unit (5) is connected to the working cavity (11).

2. The aeration carbonization test equipment during soil mixing according to claim 1, characterized in that: The soil container (2) comprises a base (21), a three-valve membrane (22), an upper pressure plate (23), a pull rod (24) and a fixed throat hoop (25); the base (21) is detachably connected to the bottom surface of the working chamber (11); a circular hole groove is provided on the base (21); the three-valve membrane (22) is placed on the circular hole groove; the upper pressure plate (23) is placed on the top of the three-valve membrane (22) and is detachably connected to the base (21) through a plurality of pull rods (24); the fixed throat hoop (25) is detachably connected to the outside of the three-valve membrane (22); the gas diffusion structure (6) comprises a bottom gas diffusion portion (61); the bottom gas diffusion portion (61) is arranged on the base (21) and is connected to the carbon dioxide introduction unit (4).

3. The aeration carbonization test equipment during soil mixing according to claim 2, characterized in that: The bottom surface air diffusion portion (61) comprises a first air pipe (611) and a strip air path (612); a plurality of the strip air paths (612) are evenly distributed along the circumferential direction of the base (21) and all of the strip air paths (612) are converged and connected at the center of the base (21); a plurality of first air diffusion holes (6121) are evenly opened on each of the strip air paths (612); the first air diffusion holes (6121) are connected to the inner cavity of the soil storage bucket (2); one end of the first air pipe (611) is connected to the carbon dioxide introduction unit (4); the other end of the first air pipe (611) penetrates into the interior of the base (21) and is connected to the convergent ends of all of the strip air paths (612).

4. The aeration carbonization test equipment during soil mixing according to claim 2, characterized in that: The gas diffusion structure (6) further comprises a side gas diffusion portion (62), the side gas diffusion portion (62) being connected to the upper pressure plate (23) and being capable of extending into the inner cavity of the soil storage barrel (2), and the side gas diffusion portion (62) being in communication with the carbon dioxide introduction unit (4).

5. The aeration carbonization test equipment during soil mixing according to claim 4, characterized in that: The side air diffusion part (62) includes a connecting piece (621) and a vertical rod (622), and a plurality of the connecting pieces (621) are evenly connected to the upper pressure plate (23) along the circumferential direction of the upper pressure plate (23). The top end of the vertical rod (622) is connected to the connecting piece (621) and communicated with the carbon dioxide introduction unit (4), and a plurality of second air diffusion holes (6221) are evenly provided on the vertical rod (622).

6. The aeration carbonization test equipment during soil mixing according to claim 1, characterized in that: The stirring unit (3) comprises a driving motor (31), a fixing plate (32), a stirring shaft assembly (33) and a fixing bracket (34); the driving motor (31) is connected to the fixing bracket (34); the output shaft of the driving motor (31) is connected to the fixing plate (32); the fixing plate (32) is connected to the two stirring shaft assemblies (33); when the driving motor (31) is started, it can drive the fixing plate (32) and the two stirring shaft assemblies (33) to rotate.

7. The aeration carbonization test equipment during soil mixing according to claim 6, characterized in that: The stirring unit (3) further comprises a fixing rod (35), a first gear (36) and a second gear (37); the first gear (36) is connected to the fixing bracket (34) via the two fixing rods (35); the stirring shaft assembly (33) comprises a stirring shaft body (331) and a stirring blade (332); the stirring blade (332) is arranged on the stirring shaft body (331); the stirring shaft body (331) is movably connected to the fixing plate (32) via a bearing; the top end of the stirring shaft body (331) is connected to the second gear (37); the second gear (37) is meshingly connected to the first gear (36).

8. The aeration carbonization test equipment during soil mixing according to claim 1, characterized in that: The carbon dioxide introduction unit (4) comprises a gas cylinder (41), a pressure regulating valve (42), a flow meter (43) and a ventilation pipeline (44); the gas cylinder (41) is connected to the gas dispersion structure (6) via the ventilation pipeline (44); the pressure regulating valve (42) and the flow meter (43) are arranged on the ventilation pipeline (44).

9. The aeration carbonization test equipment during soil mixing according to claim 1, characterized in that: The environment adjustment unit (5) comprises a humidity adjustment mechanism (51), a temperature cooling mechanism (52) and a temperature raising mechanism (53); the humidity adjustment mechanism (51) and the temperature cooling mechanism (52) are both placed inside the box (1) and are connected to the working chamber (11) via a pipeline; the temperature raising mechanism (53) is placed inside the box (1) and is connected to the working chamber (11) via an air hole.

10. The aeration carbonization test equipment during soil mixing according to claim 1, characterized in that: The box body (1) is provided with a glove hole (12) and an observation window (13) on the front of the working chamber (11), and the box body (1) is provided with a door body (14) on the side of the working chamber (11); closing the door body (14) can seal the working chamber (11).

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