CN219496288U

CN219496288U - Machine-made sand methylene blue stirring test device

Info

Publication number: CN219496288U
Application number: CN202321728320.XU
Authority: CN
Inventors: 周刚; 杨奉源; 邹红生; 邓莹; 施云峰
Original assignee: Sichuan Shudao Construction Technology Co ltd
Current assignee: Sichuan Shudao Construction Technology Co ltd
Priority date: 2023-07-04
Filing date: 2023-07-04
Publication date: 2023-08-08
Anticipated expiration: 2033-07-04

Abstract

The utility model discloses a machine-made sand methylene blue stirring test device, which relates to the field of machine-made sand powder content detection and comprises a dropper mechanism, a stirring mechanism and a fixed seat body, wherein the fixed seat body is provided with an upper-layer platform and a lower-layer platform, the dropper mechanism is arranged on the upper-layer platform, the stirring mechanism is arranged on the lower-layer platform, and the dropper mechanism can titrate a solution into the stirring mechanism; the stirring mechanism comprises a main controller, a driving motor, an electric push rod, a stirring rod and a rotatable experiment cup; the electric putter locates the upper end of lower floor's platform with the vertically ascending form of telescopic link body, the telescopic link body tip of electric putter is located to the second fastener, driving motor and electric putter respectively with main control unit signal connection. Under the accurate time control of the main controller, the driving motor drives the experimental cup to rotate, so that the experimental cup is matched with the stirring rod which is suspended in the air to enable the experimental cup to be matched with liquid in the experimental cup, the manpower consumption is reduced, the stirring efficiency is improved, and the circulation and the flow of the solution are promoted.

Description

Machine-made sand methylene blue stirring test device

Technical Field

The utility model relates to the field of detection of machine-made sand powder content, in particular to a machine-made sand methylene blue stirring test device.

Background

The method for measuring the stone powder content in machine-made sand or mixed sand by using methylene blue has become a standard specification which is generally used in the state and industry, wherein one of the common methods is a step-by-step determination method. Adding a small amount of methylene blue solution into a raw aggregate (machine-made sand or mixed sand containing machine-made sand) suspension gradually for multiple times, stirring for at least 1 minute at a certain rotating speed after each addition, dipping 1 drop of suspension by a glass rod, dripping on filter paper, observing whether obvious and stable blue halation or color ring appears around the precipitate on the filter paper, judging as an end point when the halation width appears to be more than 1mm, calculating the total consumption of the methylene blue mother solution, and finally calculating an MB value according to the principle and the formula for judgment. In practical operation, the method usually needs to be repeated for 5-10 times at least to determine the endpoint. The stepwise judgment method needs to carry out multiple tests on the machine-made sand, so that the operation process is complicated, and more time and energy are needed. When the machine-made sand powder content detection work needs to be continuously carried out for many times, the continuous stirring of the solution for many times can cause more labor consumption and unstable stirring amplitude, and the dosage calibration of the methylene blue solution and the solution titration operation can consume the energy of an experimenter, so that the labor burden is increased.

Disclosure of Invention

The utility model provides a machine-made sand methylene blue stirring test device, which solves the problems that a machine-made sand methylene blue solution in the prior art lacks a stable continuous repeated stirring mode and is difficult to save manpower.

The utility model is realized by the following technical scheme:

the machine-made sand methylene blue stirring test device comprises a dropper mechanism, a stirring mechanism and a fixed seat body, wherein the fixed seat body is provided with an upper-layer platform and a lower-layer platform, the dropper mechanism is arranged on the upper-layer platform, and the stirring mechanism is arranged on the lower-layer platform; a cavity is formed in the lower-layer platform, and the dropper mechanism can titrate the solution into the stirring mechanism; the stirring mechanism comprises a main controller, a driving motor, an electric push rod, a rotating base, a rotating tray, an experimental cup, a stirring rod, a first fastening piece, a second fastening piece and a connecting rod; a plurality of fastening plates are uniformly and vertically arranged around the rotary tray, and the fastening plates can be used for damping and turning along the edge of the rotary tray; the driving motor and the main controller are arranged in a cavity of the lower-layer platform, and an opening which can enable a rotating shaft on the driving motor to pass through is arranged above the cavity and the lower-layer platform; the rotary base is arranged above the opening and is coaxially connected with a motor gear on the driving motor, and the rotary tray and the rotary base are fixed in a detachable mode; the experimental cup is placed at the upper end of the rotary tray; the lower end of the stirring rod is arranged in the experimental cup, and the upper end of the stirring rod is connected with the first fastening piece; the electric push rod is arranged at the upper end of the lower-layer platform in a mode that the telescopic rod body is vertically upwards, the second fastening piece is arranged at the end part of the telescopic rod body of the electric push rod, and the connecting rod is fixed between the first fastening piece and the second fastening piece; the driving motor and the electric push rod are respectively connected with the main controller through signals.

Specifically, the dropper mechanism is used for titrating the methylene blue solution into a stirring mechanism, and the stirring mechanism is a main body part for stirring the methylene blue solution and the machine-made sand solution. The rotary tray is a direct carrier of the experimental cup, the carrier is divided into the rotary tray and the rotary base, the experimental cup can be fastened outside the device by a user, the influence of other parts of the device is avoided during operation, and meanwhile, the rotary base can also cover the cavity, so that dust or liquid can be reduced to fall into the cavity from the opening. The fastening plate is used for fastening the experimental cup on the rotary tray by means of the clamping effect, and the damping effect during turning of the fastening plate can still have a damping effect on the premise of ensuring the movable capability. The main controller is used for presetting the rotation speed and the rotation duration of the driving motor, and starting the driving motor to drive the experimental cup to rotate under the condition that the stirring rod is kept in a vertical state, so that the stirring rod is matched with liquid in the experimental cup with the stirring rod kept in suspension, the manpower consumption is reduced, the stirring efficiency is improved, the stability of stirring amplitude and speed can be ensured, and the circulation and flow of a solution can be better promoted.

Further, the dropper mechanism comprises a solution bottle, a dropper main body, a first control valve, a second control valve and a first limiting piece; the second control valve is arranged on the dropper main body, the dropper main body is divided into a first pipe section and a second pipe section along the upper and lower parts through the second control valve, and the lower end of the second pipe section extends to the upper part of the experimental cup; the first control valve is arranged on a liquid outlet end of the solution bottle, and the liquid outlet end is communicated to the upper end of the first pipe section; one end of the first limiting piece is sleeved below the joint of the first pipe section and the liquid outlet end in a shaft sleeve mode, and the other end of the first limiting piece is fixed at the upper end of the upper-layer platform; the side wall of the first pipe section is provided with a liquid level detection assembly with adjustable height, and the first control valve, the second control valve and the liquid level detection assembly are respectively connected with a main controller in a signal mode.

Further, an annular limiting groove with the bottom center as the center is formed in the inner bottom of the experimental cup, and the width of the limiting groove is larger than the diameter of the stirring rod.

Further, one end of the fastening plate is coaxially damping hinged with the edge of the rotary tray, and the other end of the fastening plate is provided with a buffer assembly which can be clung to the outer wall of the experimental cup.

Further, the buffer component is arranged on the inner side wall of the upper end part of the fastening plate; the buffer component comprises a spring pad and a rubber pad, wherein the fastening plate, the spring pad and the rubber pad are sequentially and fixedly connected, and the rubber pad can be clung to the outer wall of the experimental cup.

Further, the stirring rod further comprises a second limiting piece, one end of the second limiting piece is sleeved on the stirring rod below the first fastening piece in a shaft sleeve mode, and the other end of the second limiting piece is fixed on the lower end face of the upper-layer platform.

Further, the liquid level detection assembly comprises a photoelectric sensor, a first accommodating box and a second accommodating box; the first accommodating box and the second accommodating box are arranged on the outer wall of the first pipe section in a laminating way and are connected through an elastic belt; the photoelectric sensor comprises a transmitter and a receiver which are respectively arranged in the first accommodating box and the second accommodating box, the transmitter and the receiver are mutually kept in optical signal connection, and the light source passes through the interior of the first pipe section; the transmitter and the receiver are respectively connected with the main controller in a signal way.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. under the accurate time control of the main controller, the driving motor drives the experiment cup to rotate, so that the experiment cup is matched with the stirring rod which is kept suspended to be used for liquid in the experiment cup, the manpower consumption is reduced, the stirring efficiency is improved, the stability of stirring amplitude and speed can be ensured, the circulation and flow of a solution can be better promoted, and the stirring is more uniform;

2. the photoelectric sensor is used for detecting the usage amount of the methylene blue solution in real time, and the electric signal is matched with the stirring mechanism to work, so that the working convenience of adding the methylene blue solution and the efficiency of overall stirring work are obviously improved;

3. the fastening plate with damping flipping function is used, and the experiment cup is fastened by combining the spring pad and the rubber pad, so that the device can adapt to experiment cups of various sizes on the premise of ensuring that the experiment cups are placed stably.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model. In the drawings:

FIG. 1 is a schematic elevational view of the present utility model, wherein the underlying platform is shown in cross-section;

FIG. 2 is a schematic elevational view of the rotary tray and the test cup of the present utility model, with the test cup shown in cross-section;

FIG. 3 is a top view of the swivel base, swivel tray and test cup of the utility model;

FIG. 4 is a schematic top view of the liquid level detection assembly of the present utility model;

in the drawings, the reference numerals and corresponding part names:

the device comprises a 1-upper platform, a 11-lower platform, a 2-main controller, a 21-driving motor, a 22-electric push rod, a 3-rotating base, a 31-rotating tray, a 32-fastening plate, a 33-experiment cup, a 34-stirring rod, a 35-limiting groove, a 4-first fastening piece, a 41-second fastening piece, a 42-connecting rod, a 5-solution bottle, a 51-first pipe section, a 52-second pipe section, a 53-first control valve, a 54-second control valve, a 6-spring pad, a 61-rubber pad, a 7-first accommodating box, a 71-second accommodating box, a 72-emitter, a 73-receiver, an 8-first limiting piece and a 82-second limiting piece.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.

As shown in fig. 1-3, the embodiment comprises a dropper mechanism, a stirring mechanism and a fixed seat body, wherein the fixed seat body is provided with an upper layer platform 1 and a lower layer platform 11, the dropper mechanism is arranged on the upper layer platform 1, and the stirring mechanism is arranged on the lower layer platform 11; a cavity is formed in the lower-layer platform 11, and a dropper mechanism can titrate the solution into a stirring mechanism; the stirring mechanism comprises a main controller 2, a driving motor 21, an electric push rod 22, a rotating base 3, a rotating tray 31, a laboratory cup 33, a stirring rod 34, a first fastening piece 4, a second fastening piece 41 and a connecting rod 42; a plurality of fastening plates 32 are uniformly and vertically arranged around the rotary tray 31, and the fastening plates 32 can perform damping turnover along the edge of the rotary tray 31; the driving motor 21 and the main controller 2 are arranged in a cavity of the lower-layer platform 11, and an opening which can enable a rotating shaft on the driving motor 21 to pass through is arranged above the cavity and the lower-layer platform 11; the rotary base 3 is arranged above the opening and is coaxially connected with a motor gear on the driving motor 21, and the rotary tray 31 and the rotary base 3 are fixed in a detachable mode; the experimental cup 33 is placed at the upper end of the rotary tray 31; the lower end of the stirring rod 34 is arranged in the experimental cup 33, and the upper end of the stirring rod is connected with the first fastening piece 4; the electric push rod 22 is arranged at the upper end of the lower-layer platform 11 in a manner that the telescopic rod body is vertically upwards, the second fastening piece 41 is arranged at the end part of the telescopic rod body of the electric push rod 22, and the connecting rod 42 is fixed between the first fastening piece 4 and the second fastening piece 41; the driving motor 21 and the electric push rod 22 are respectively connected with the main controller 2 in a signal way.

The dropper mechanism is used for titrating the methylene blue solution into the stirring mechanism, and the stirring mechanism is a main body part for stirring the methylene blue solution and the machine-made sand solution. The rotary tray 31 is a direct carrier of the experiment cup 33, the carrier is divided into the rotary tray 31 and the rotary base 3, the experiment cup 33 can be fastened outside the device by a user, the influence of other parts of the device is avoided during operation, meanwhile, the rotary base 3 can also cover the cavity, and dust or liquid can be reduced to fall into the cavity from the opening. The fastening plate 32 is used for fastening the experimental cup 33 on the rotary tray 31 by means of clamping effect, and the damping effect during turning can still have damping effect on the premise of ensuring the movable capability. The main controller 2 is used for presetting the rotation speed and the rotation duration of the driving motor 21, and starting the driving motor 21 to drive the experiment cup 33 to rotate under the condition that the stirring rod 34 is kept in a vertical state. In a specific application, as an alternative embodiment, the detachable fixing manner of the rotary tray 31 and the rotary base 3 may be a conventional fastening manner or a knob manner, so that the lower end surface of the rotary tray 31 and the upper end surface of the rotary base 3 are fixed.

When the device is used, the electric push rod 22 is manually started to extend the telescopic rod body, so that the stirring rod 34 is driven to rise through the fixed cooperation of the first fastening piece 4, the second fastening piece 41 and the connecting rod 42 to make a space above the rotary base 3 vacate, then the experiment cup 33 is placed on the rotary tray 31, whether the center position of the cup bottom of the experiment cup 33 is aligned with the center of the rotary tray 31 or not is observed and calibrated by naked eyes, then the fastening plate 32 is turned to fasten the experiment cup 33, then the machine-made sand solution is poured into the experiment cup 33, and the rotary tray 31 is moved into the space above the rotary base 3 for fixed installation. And then, the electric push rod 22 is started to shrink the extended rod body to drive the height of the stirring rod 34 to be reduced and gradually extend to the vicinity of the bottom of the experimental cup 33, after the required quantitative methylene blue solution is dripped by virtue of the dropper structure, the main controller 2 is started to start the driving motor 21 to rotate, and the stirring rod 34 suspended and fixed in the experimental cup 33 is matched to realize constant-speed and stable-position continuous stirring of the methylene blue solution and the machine-made sand solution. Since the present embodiment is not an integrally packaged high-speed stirrer, in practice, the speed of the drive motor 21 may be set slightly higher than the manual speed. The main controller 2 is preset to stir for 1 minute or 3 minutes, namely, the stirring is stopped, 1 drop of suspension is dipped by a glass rod and is dripped on filter paper, whether obvious and stable blue halation or chromatic circle appears around the precipitate on the filter paper is observed, if not, the main controller 2 starts the driving motor 21 to stir in a rotating way, when the width of the halation appears to be more than 1mm, the end point can be judged, the total consumption of methylene blue mother liquor is calculated, and finally the MB value is calculated according to the principle and the formula to judge. And repeating the operation for 5-10 times to determine the end point. Under the accurate time control of the main controller 2, the driving motor 21 drives the experiment cup 33 to rotate, so that the experiment cup 33 is matched with the stirring rod 34 which is kept suspended, and the stirring efficiency is improved while the manpower consumption is reduced, the stability of stirring amplitude and speed can be ensured, the circulation and flow of the solution can be better promoted, and the stirring is more uniform. In particular, in order to avoid irregular collision of the stirring rod 34 on the experimental cup 33, the rotation centers of the driving motor, the rotation base, the rotation tray and the experimental cup should be overlapped on the same point as much as possible in the vertical direction.

Further, as a possible embodiment, as shown in fig. 1 and 4, the dropper mechanism includes a solution bottle 5, a dropper body, a first control valve 53, a second control valve 54, and a first stopper 8; the second control valve 54 is arranged on the dropper main body, the dropper main body is divided into a first pipe section 51 and a second pipe section 52 along the upper and lower directions through the second control valve 54, and the lower end of the second pipe section 52 extends to the upper part of the experimental cup 33; the first control valve 53 is arranged on a liquid outlet end of the solution bottle 5, and the liquid outlet end is communicated with the upper end of the first pipe section 51; one end of the first limiting piece 8 is sleeved below the joint of the first pipe section 51 and the liquid outlet end in a shaft sleeve mode, and the other end of the first limiting piece is fixed at the upper end of the upper-layer platform 1; the side wall of the first pipe section 51 is provided with a liquid level detection component with adjustable height, and the first control valve 53, the second control valve 54 and the liquid level detection component are respectively connected with the main controller 2 in a signal manner. Wherein the liquid level detection assembly comprises a photoelectric sensor, a first accommodating box 7 and a second accommodating box 71; the first accommodating box 7 and the second accommodating box 71 are arranged on the outer wall of the first pipe section 51 in a bonding way and are connected through an elastic belt; the photoelectric sensor comprises an emitter 72 and a receiver 73, wherein the emitter 72 and the receiver 73 are respectively arranged in a first accommodating box 7 and a second accommodating box 71, the emitter 72 and the receiver 73 are mutually kept in optical signal connection, and a light source passes through the inside of the first pipe section 51; the transmitter 72 and the receiver 73 are respectively in signal connection with the main controller 2. In a specific application, the liquid level detecting assembly can have different purposes after being adjusted by different heights, for example, the liquid level detecting assembly can be used for monitoring the shortage of the methylene blue solution in the first pipe section 51 or for quantitatively controlling the usage of the methylene blue solution in each stirring experiment so as to reduce waste. In this embodiment, the liquid level detection assembly is used to quantitatively monitor the methylene blue solution. In use, the required methylene blue solution is poured into the solution bottle 5 for later use, and at this time, under the control of the main controller 2, both the first control valve 53 and the second control valve 54 remain closed. After the test cups 33 fastened to the rotary tray 31 are mounted on the rotary base 3, the main controller 2 is started up, and the process is as follows: the first control valve 53 is opened first, and the methylene blue solution in the solution bottle 5 is put into the first pipe section 51, and at this time, the second control valve 54 is not yet opened, so that the methylene blue solution is accumulated in the first pipe section 51. The height position of the liquid level detection assembly is set at the position of the required dosage for one-time stirring, when the methylene blue solution is accumulated near the position of the dosage, the signal light sources of the emitter 72 and the receiver 73 are interfered, when the light quantity is changed, the photoelectric sensor can convert the change of the light signal into an electric signal and transmit the electric signal to the outside, and the photoelectric sensor can be used for detecting the non-electric quantity which directly causes the light quantity change. After the liquid level detection assembly sends an electric signal to the main controller 2, the main controller 2 receives the signal and then closes the first control valve 53, then the main controller 2 opens the second control valve 54 and controls the opening and closing size, so that the methylene blue solution is kept in a slower titration state, and meanwhile, the main controller 2 starts the driving motor 21 at the moment to enable the experiment cup 33 to keep rotating at a certain rotating speed, and the solution is stirred by the stirring rod 34 in the rotating process.

As a specific application, in implementation, it is preferable to use electronic control valves for the glass tube or other chemical reagent tube as the first control valve 53 and the second control valve 54. The first limiting part 8 fixes and limits the dropper main body in a shaft sleeve mode, and the sleeve is arranged below the joint of the first pipe section 51 and the liquid outlet end because the liquid outlet end pipe body can play a role in clamping the shaft sleeve to prevent the dropper main body from sliding down from the first limiting part 8. In a specific application, the sizes of the upper platform 1 and the lower platform 11 are not limited, and therefore, the arrangement form of the dropper mechanism is not limited in this application, that is, the dropper body may be fixed on the outer side of the upper platform 1, or the end of the second pipe section 52 may extend beyond the lower end of the upper platform 1 through the upper platform 1, and the arrangement of the stirring rod 34 is similar. In this embodiment, the dropper body is selected to pass through the upper stage 1, and the lower portion of the stirring rod 34 is selected to be disposed outside the upper stage 1. Further as a possible embodiment, the first fastener 4 and the second fastener 41 may use a throat hoop as a fixing means.

Further, as a possible embodiment, as shown in fig. 1 and 3, an annular limiting groove 35 with the center of the bottom as the center of the circle is provided at the inner bottom of the experimental cup 33, and the width of the limiting groove 35 is larger than the diameter of the stirring rod 34; and meanwhile, the stirring rod 34 is further provided with a second limiting piece 82, one end of the second limiting piece 82 is sleeved on the stirring rod 34 below the first fastening piece 4 in a shaft sleeve mode, and the other end of the second limiting piece 82 is fixed on the lower end face of the upper-layer platform 1. Since the continuous rotation of the experimental cup 33 drives the solution to flow in an accelerated manner, a certain shaking of the stirring rod 34 may occur. Because the stirring process of this embodiment needs to keep the stirring rod 34 in a stable state to ensure the whole experimental effect, the limiting groove 35 and the second limiting piece 82 are both used for reducing the shaking of the stirring rod 34 in the experimental cup 33, so as to avoid influencing the stirring display result of the solution due to other changes in the stirring speed and amplitude.

Further, as a possible embodiment, as shown in fig. 1-3, one end of the fastening plate 32 is coaxially and damping hinged with the edge of the rotary tray 31, and the other end of the fastening plate is provided with a buffer assembly, and the buffer assembly can be tightly attached to the outer wall of the experiment cup 33; the buffer assembly is arranged on the inner side wall of the upper end part of the fastening plate 32; the buffer assembly comprises a spring pad 6 and a rubber pad 61, the fastening plate 32, the spring pad 6 and the rubber pad 61 are fixedly connected in sequence, and the rubber pad 61 can be clung to the outer wall of the experimental cup 33. Both the spring pad 6 and the rubber pad 61 have a cushioning material capable of continuing to maintain the fastening strength with a certain deformability. The experiment cup 33 is fastened by combining the spring pad 6 and the rubber pad 61, so that the device can adapt to various experiment cup 33 types with different sizes on the premise of ensuring that the experiment cup 33 is placed firmly.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims

1. The machine-made sand methylene blue stirring test device comprises a dropper mechanism, a stirring mechanism and a fixed seat body, and is characterized in that the fixed seat body is provided with an upper layer platform (1) and a lower layer platform (11), the dropper mechanism is arranged on the upper layer platform (1), and the stirring mechanism is arranged on the lower layer platform (11); a cavity is arranged in the lower layer platform (11), and the dropper mechanism can titrate the solution into the stirring mechanism;

the stirring mechanism comprises a main controller (2), a driving motor (21), an electric push rod (22), a rotating base (3), a rotating tray (31), a laboratory cup (33), a stirring rod (34), a first fastening piece (4), a second fastening piece (41) and a connecting rod (42); a plurality of fastening plates (32) are uniformly and vertically arranged around the rotary tray (31), and the fastening plates (32) can be used for damping and turning along the edge of the rotary tray (31); the driving motor (21) and the main controller (2) are arranged in a cavity of the lower-layer platform (11), and an opening which can enable a rotating shaft on the driving motor (21) to pass through is arranged above the cavity and the lower-layer platform (11); the rotary base (3) is arranged above the opening and is coaxially connected with a motor gear on the driving motor (21), and the rotary tray (31) and the rotary base (3) are fixed in a detachable mode; the experimental cup (33) is arranged at the upper end of the rotary tray (31); the lower end of the stirring rod (34) is arranged in the experimental cup (33), and the upper end of the stirring rod is connected with the first fastening piece (4); the electric push rod (22) is arranged at the upper end of the lower-layer platform (11) in a vertically upward mode of a telescopic rod body, the second fastening piece (41) is arranged at the end part of the telescopic rod body of the electric push rod (22), and the connecting rod (42) is fixed between the first fastening piece (4) and the second fastening piece (41); the driving motor (21) and the electric push rod (22) are respectively connected with the main controller (2) in a signal mode.

2. The machine-made sand methylene blue stirring test device according to claim 1, wherein the dropper mechanism comprises a solution bottle (5), a dropper main body, a first control valve (53), a second control valve (54) and a first limiting piece (8); the second control valve (54) is arranged on the dropper main body, the dropper main body is divided into a first pipe section (51) and a second pipe section (52) along the upper and lower directions through the second control valve (54), and the lower end of the second pipe section (52) extends to the upper part of the experimental cup (33); the first control valve (53) is arranged on a liquid outlet end of the solution bottle (5), and the liquid outlet end is communicated to the upper end of the first pipe section (51); one end of the first limiting piece (8) is sleeved below the joint of the first pipe section (51) and the liquid outlet end in a shaft sleeve mode, and the other end of the first limiting piece is fixed at the upper end of the upper-layer platform (1); the side wall of the first pipe section (51) is provided with a liquid level detection component with adjustable height, and the first control valve (53), the second control valve (54) and the liquid level detection component are respectively connected with the main controller (2) in a signal mode.

3. The machine-made sand methylene blue stirring test device according to claim 1, wherein an annular limiting groove (35) taking the bottom center as the center of a circle is formed in the inner bottom of the experimental cup (33), and the width of the limiting groove (35) is larger than the diameter of the stirring rod (34).

4. The machine-made sand methylene blue stirring test device according to claim 1, characterized in that one end of the fastening plate (32) is coaxially damping hinged with the edge of the rotary tray (31), and the other end of the fastening plate is provided with a buffer assembly which can be clung to the outer wall of the experimental cup (33).

5. The machine-made sand methylene blue stirring test device according to claim 4, wherein the buffer component is arranged on the inner side wall of the upper end part of the fastening plate (32); the buffer component comprises a spring pad (6) and a rubber pad (61), wherein the fastening plate (32), the spring pad (6) and the rubber pad (61) are sequentially and fixedly connected, and the rubber pad (61) can be clung to the outer wall of the experimental cup (33).

6. The machine-made sand methylene blue stirring test device according to claim 2, further comprising a second limiting piece (82), wherein one end of the second limiting piece (82) is sleeved on a stirring rod (34) below the first fastening piece (4) in a shaft sleeve mode, and the other end of the second limiting piece is fixed on the lower end face of the upper platform (1).

7. A machine-made sand methylene blue stirring test device according to claim 2, characterized in that the liquid level detection assembly comprises a photoelectric sensor, a first housing box (7) and a second housing box (71); the first accommodating box (7) and the second accommodating box (71) are adhered to the outer wall of the first pipe section (51) and are connected through an elastic belt; the photoelectric sensor comprises an emitter (72) and a receiver (73), the emitter (72) and the receiver (73) are respectively arranged in a first accommodating box (7) and a second accommodating box (71), the emitter (72) and the receiver (73) are mutually kept in optical signal connection, and a light source passes through the inside of the first pipe section (51); the transmitter (72) and the receiver (73) are respectively connected with the main controller (2) in a signal way.