WO2011032409A1

WO2011032409A1 - Square quantum detecting method, system, device for agglomerates in mixing drum and mixing vehicle

Info

Publication number: WO2011032409A1
Application number: PCT/CN2010/074476
Authority: WO
Inventors: 周翔; 周继辉; 彭清祥; 邓秋连
Original assignee: 湖南三一智能控制设备有限公司; 三一重工股份有限公司
Priority date: 2009-09-16
Filing date: 2010-06-25
Publication date: 2011-03-24
Also published as: CN101655385A; CN101655385B

Abstract

A square quantum detecting method for agglomerates in a mixing drum of a mixing vehicle, involves detecting the unloaded weight M of the mixing drum; detecting the loaded weight G of the mixing drum; calculating the weight T of agglomerates in the mixing drum by subtracting the unloaded weight M from the loaded weigh G, T=G-M; and calculating the square quantum V of agglomerates in the mixing drum by dividing the weight T of agglomerates by a predetermined weight K of each square of agglomerates, V=T/K. A square quantum detecting system for agglomerates in the mixing drum is provided. A square quantum detecting device for agglomerates in the mixing drum is provided. A mixing vehicle including the square quantum detecting device for agglomerates in a mixing drum is provided.

Description

The method for measuring the amount of agglomerates in a stirred tank, the system, the device and the mixer. The application is submitted to the Chinese Patent Office on September 16, 2009, and the application number is 200910176216.2. The invented name is "the agglomerate in the stirred tank". The priority of the Chinese patent application of the method, the system, the device and the agitator is incorporated herein by reference.

Technical field

The invention relates to the technical field of concrete mixer trucks, in particular to a method for detecting agglomerates in a stirred tank, and to a method for detecting agglomerates in a stirred tank and a coalescing method in a stirred tank. The quantity detection device of the object.

Background technique

The various agglomerates processed by the mixing station are usually transported to the construction site by a concrete mixer truck, and the concrete mixer truck is called a mixer truck. Concrete mixer trucks usually include a car chassis and a mixing tank. Since the mixer truck transports agglomerates, the agitator tank needs to be continuously rotated in order to prevent the agglomerates from solidifying. In order to ensure the normal rotation of the mixing tank, the mixing tank and the chassis of the automobile generally have three support points, and the mixing tank is arranged on the chassis of the automobile through the three supporting points. Wherein, the two support points are two rollers arranged symmetrically, the two rollers support the stirring tank and rotate together with the stirring tank; the third supporting point is located at the upper end surface of the supporting gantry at the stirring tank reducer, the stirring tank The front support point abuts against the upper end surface of the support gantry.

The customer orders a certain amount of agglomerates for the construction of the mixing station, and uses the mixer truck to transport the agglomerates required by the mixing station. The mixer truck transports the agglomerates at the mixing station and transports them to the customer. The quantity of agglomerates is a parameter that both the customer and the owner of the mixer car care about. For the customer, the quantity of the agglomerate can be used to determine whether the owner of the mixer is suspected of stealing the material, and the quantity of the agglomerate can be used to judge the transportation. Whether the amount of agglomerates is within the specified range.

At present, there are mainly the following methods for detecting the amount of agglomerates in a stirred tank:

In the first method, a pressure sensor and an acceleration sensor that rotate together with the stirring tank are installed on the stirring tank, and the pressure and the accumulation angle of the agglomerate are measured by the pressure sensor, and the rotational acceleration of the stirring tank is measured by the acceleration sensor. The amount of agglomerates in the stirred tank was judged accordingly.

In this method, the pressure sensor and the acceleration sensor mounted on the mixing tank are accompanied by the stirring tank. When rotating together, the signals collected by the pressure sensor and the acceleration sensor must be sent to the controller through the wireless channel, and the pressure sensor and the acceleration sensor are continuously rotated, and the signals sent from the pressure sensor and the acceleration sensor to the controller will be unstable, making the measurement The accuracy is not high; this method needs to collect the pressure of the agitating tank, the accumulation angle of the agglomerate, the rotational acceleration of the agitating tank, etc., the parameters required are large, the calculation is complicated, and the practicability is poor; The measurement results of the method are related to the size of the structure of the agitating tank, and the versatility is poor.

In the second method, a pressure sensor is installed in the hydraulic circuit of the agitating tank, the pressure in the hydraulic circuit is measured by the pressure sensor, and the amount of agglomerates in the agitating tank is judged according to the change in the pressure in the hydraulic circuit.

This method is realized by installing a pressure sensor in the hydraulic circuit of the stirring tank. The installation method of the pressure sensor is complicated; the pressure in the hydraulic circuit of the stirring tank is affected by various factors, such as the lubrication degree of the stirring tank, The degree of wear, the wear of hydraulic components, etc., these factors will result in low measurement accuracy, and the implementation is complicated and less feasible.

In summary, the method for detecting the amount of agglomerates in the stirred tank in the prior art has the disadvantages that the measurement accuracy is not high, the implementation is difficult, and the utility is not practical.

Summary of the invention

SUMMARY OF THE INVENTION A first object of the present invention is to provide a method for detecting agglomerates in a stirred tank, which method can accurately measure the amount of the inside of the stirred tank, and the embodiment is simple, and has good practicality.

A second object of the present invention is to provide a method for detecting agglomerates in a tank. A third object of the present invention is to provide a measuring device for agitating agglomerates in a tank. A fourth object of the present invention is to provide a mixer truck.

In order to achieve the above first object, the present invention provides a method for detecting agglomerates in a stirred tank, comprising:

Step A. Detecting the no-load weight of the stirred tank M;

Step B. Detecting the carrying capacity of the stirring tank G;

Step C. Calculate the weight T of the agglomerate in the stirred tank according to the formula T=G-M;

Step D. Calculate the square amount V of the agglomerates in the stirred tank according to the formula V=T/K, where K is the preset weight of each agglomerate. Preferably, after the step A and before the step B, the method further includes:

Step A1. Detecting the full load weight of the stirred tank N;

The preset weight K of each agglomerate is calculated by the formula K = (N - M) / _1⁄4 , N is the full load of the stirred tank, and M is the no-load weight of the stirred tank, V. To stir the volume of the tank.

Preferably, after the step D, the method further includes:

Step E. judging whether the square amount V of the agglomerates in the stirring tank is consistent with the predetermined amount.

Preferably, after step E, the method further includes:

Step F. Display and store the amount V of agglomerates in the stirred tank and the judgment result in the step E.

The method for detecting the agglomerate in the stirring tank provided by the invention respectively detects the no-load weight M and the bearing weight G of the stirring tank, and calculates the weight T of the agglomerate in the stirring tank according to the formula T=GM, according to the formula V = T / K, calculate the amount V of agglomerates in the stirred tank, K is the default weight of each agglomerate. The method for detecting the agglomerate in the stirred tank only needs to calibrate the weight K of each agglomerate before the test, measure the no-load weight of the stirred tank, and measure the load weight G of the stirred tank. The amount of agglomerates in the stirred tank is detected, the measurement parameters are small, the weight is the basic measurement parameter, and the measurement accuracy is high; the density of the same type of agglomerates produced by the same mixing station is substantially uniform, and each side is coalesced The weight of the material is only required to be calibrated once, and the empty weight of the mixing tank of each mixer is also fixed. The weight of the agitating tank can be measured for each test, and the amount of agglomerates in the mixing tank can be obtained. The detection tube is versatile and versatile.

This method can quickly and accurately measure the amount of agglomerates in the mixing tank, provide accurate values for customers and transport owners, and effectively prevent the truck from stealing during transportation. A basis for determining whether the actual amount of agglomerates is consistent with a predetermined amount.

In order to achieve the above second object, the present invention also provides a method for detecting agglomerates in a tank, comprising: a detecting unit for detecting the weight of the stirring tank and emitting a weight signal; The weight signal is received, and the amount of agglomerates in the stirred tank is calculated according to the method for detecting the amount of agglomerates in the stirred tank according to the above claims.

Since the method for detecting the amount of agglomerates in the agitating tank has the above technical effects, The method of measuring the agglomerate of the agglomerate in the stirred tank should also have the corresponding technical effect.

In the preferred solution, the method further includes:

The judging unit is configured to judge whether the amount V of the agglomerates in the stirring tank is consistent with the predetermined amount.

a display unit, configured to display a square quantity V of agglomerates in the stirring tank and a judgment result of the determining unit;

a storage unit for storing the amount of agglomerates in the agitating tank V. The judgment result of the judging unit.

In order to achieve the above third object, the present invention also provides a method for detecting agglomerates in a tank, comprising a controller, a weight sensor having a quantity of not less than one; the weight sensor being mounted on a support of the agitating tank At a point, the weight signal output end of the weight sensor is coupled to the weight signal receiving end of the controller.

The weight sensor is installed at the support point of the agitating tank, and is used for measuring the weight of the stirring tank and emitting a weight signal; the controller is configured to receive the weight signal from the weight sensor, and according to the above-mentioned quantity of the agglomerate in the stirring tank The method calculates the amount of agglomerates in the stirred tank. The square amount detecting device for agglomerating the inside of the tank, the weight sensor is installed at the support point of the agitating tank, and the weight sensor is mounted to the drum. This device can quickly and accurately measure the amount of agglomerates in the mixing tank, providing accurate values for customers and transport owners, effectively preventing the stray car from stealing during transportation, and providing customers with A basis for determining whether the actual amount of agglomerates is consistent with a predetermined amount.

In a preferred embodiment, the weight sensor is mounted at a roller support point of the agitating tank.

In a preferred embodiment, the weight sensor is mounted on the upper end surface of the support gantry at the agitator reducer, and the front support point of the agitation tank abuts against the force receiving surface of the weight sensor.

In order to achieve the above fourth object, the present invention also provides a mixer truck equipped with the above-mentioned square amount detecting device for agglomerating in the stirring tank, due to the square quantity detection of the agglomerates in the above-mentioned stirring tank The device has the above-described technical effects, and the mixer truck equipped with the square amount detecting device of the agglomerate in the above-mentioned agitating tank should also have a corresponding technical effect.

DRAWINGS

1 is a concrete embodiment of the method for detecting the amount of agglomerates in a stirred tank provided by the present invention Flow chart of the manner of application;

2 is a flow chart showing another specific embodiment of a method for detecting agglomerates of agglomerates in a stirred tank according to the present invention;

3 is a schematic view of a frame of a square detecting system for agglomerates in a stirred tank according to the present invention;

4 is a schematic view showing a mounting position of a weight sensor in the square detecting device of the agglomerate in the stirring tank according to the present invention;

Figure 5 is a schematic view showing another mounting position of the weight sensor in the square detecting device of the agglomerate in the stirring tank according to the present invention;

Among them, Figure 1 - Figure 5:

The support frame 10, the groove 11, the first roller 21, and the second roller 22.

detailed description

The first core of the present invention provides a method for detecting the amount of agglomerates in a stirred tank, which can accurately measure the amount of the inside of the stirred tank, and the embodiment is simple, and has good practicability; A second core of the invention is to provide a square detecting system for agglomerating agglomerates; a third core of the present invention is to provide a square detecting device for agglomerating agglomerates; the fourth core of the present invention A mixer truck is provided.

The present invention is described in the following with reference to the accompanying drawings. The following description is merely exemplary and illustrative, and should not be construed as limiting the scope of the invention.

Referring to Fig. 1, Fig. 1 is a flow chart showing a specific embodiment of a method for detecting agglomerates of agglomerates in a stirred tank according to the present invention.

As shown in FIG. 1, the method for detecting the amount of agglomerates in a stirred tank provided by the present invention comprises the following steps:

In step S101, the no-load weight ^1 of the stirring tank is detected. Before measuring the amount of agglomerates in the stirred tank, the weight K of each agglomerate is measured and the no-load weight M of the stirred tank is detected. The weight K of each agglomerate can be calibrated by measuring the density of the agglomerates. The density of the same type of agglomerates processed by the same mixing station is substantially the same, in order to prevent artificial pairing The weight K of the knot is changed, and the weight K of each agglomerate can be calibrated as needed. Each time the weight K of each agglomerate is marked, a password and a password are required to be calibrated; The no-load weight M of the stirred tank is measured, that is, the weight of the stirred tank when the can is measured.

In step S102, the load weight G of the stirring tank is detected. When the agitator loads the agglomerate at the mixing station, according to the amount of the agglomerate ordered by the customer, the corresponding amount of agglomerate is charged into the agitating tank, and the agglomerate is filled in the agitating tank, and the measurement is carried out. The weight of the stirred tank of the knot.

Step S103, calculating the weight of the agglomerate in the stirring tank according to the formula T=GM! ¹ . After measuring the load weight G of the stirred tank, the weight T of the agglomerate in the stirred tank can be calculated according to the measured weight M of the stirred tank and according to the formula T=GM.

In step S104, according to the formula V=T/K, the square quantity V of the agglomerates in the stirring tank is calculated, and K is the preset weight of each agglomerate. After calculating the weight T of the agglomerate in the stirred tank, according to the formula V=T/K, the square V of the agglomerate in the stirred tank can be calculated, and Κ is the weight of each aggregate previously calibrated.

In a preferred embodiment, in order to allow the customer to more intuitively determine whether the amount of agglomerates in the agitating tank is consistent with a predetermined amount, step 104 further includes steps 105 and 106.

Step S105, judging whether the square amount V of the agglomerates in the stirring tank is consistent with the predetermined amount. In step S106, the square quantity V of the agglomerates in the stirred tank and the judgment result in the step 105 are displayed and stored.

The technical effects of the method for detecting the amount of agglomerates in the stirred tank provided by the present invention are described below.

The method for detecting the agglomerate in the stirring tank provided by the invention respectively detects the no-load weight Μ and the carrying weight G of the stirring tank, and calculates the weight T of the agglomerate in the stirring tank according to the formula T=GM, according to the formula V = T / K, calculate the amount V of agglomerates in the stirred tank, K is the default weight of each agglomerate. The method for detecting the agglomerate in the stirred tank only needs to calibrate the weight K of each agglomerate before the test, measure the no-load weight of the stirred tank, and measure the load weight G of the stirred tank. The amount of agglomerates in the stirred tank is detected, the measurement parameters are small, the weight is the basic measurement parameter, and the measurement accuracy is high; the density of the same type of agglomerates produced by the same mixing station is substantially uniform, and each side is coalesced The weight of the material is only required to be calibrated once, and the empty weight of the mixing tank of each mixer is also fixed. The weight of the agitating tank can be measured for each test, and the amount of agglomerates in the mixing tank can be obtained. The detection tube is versatile and versatile.

This method can quickly and accurately measure the amount of agglomerates in the stirred tank for customers. Providing accurate values with the transport owner can effectively prevent the stray car from stealing during transportation, and also provides a basis for the customer to determine whether the actual amount of agglomerates is consistent with the predetermined amount.

In the above embodiment, the weight K of each agglomerate is calibrated by measuring the density of the agglomerate, and the method for detecting the agglomerate in the stirred tank provided by the present invention can also measure the weight of the stirred tank. The method calibrates the weight K of each agglomerate, which is described in the following examples.

Referring to Fig. 2, Fig. 2 is a flow chart showing another embodiment of the method for detecting the amount of agglomerates in a stirred tank according to the present invention.

As shown in FIG. 2, the method for detecting the amount of agglomerates in a stirred tank provided by the present invention comprises the following steps:

Step S201, detecting the no-load weight ^1 of the stirring tank. Before measuring the amount of agglomerates in the stirred tank, first check the no-load weight M of the stirred tank, and check the no-load weight M of the stirred tank, that is, measure the weight when the tank is empty.

Step S202, detecting the full load of the mixing tank! ^. Before measuring the amount of agglomerates in the stirred tank, first check the full load N of the stirred tank. Detect the full load weight N of the stirred tank, that is, measure the weight of the stirred tank filled with agglomerates.

According to the formula K = (N - M) / _1⁄4 , the weight 每 of each agglomerate can be calculated, M is the agitating tank empty weight measured in step 201, and N is the full load weight of the stirred tank measured in step 202. , V. To stir the volume of the tank. This eliminates the need to separately measure the density of the agglomerates. By measuring the no-load weight and full load of the stirred tank, the weight of each agglomerate can be calibrated.

In order to prevent artificial changes to the weight K of each agglomerate, the weight K of each agglomerate can be calibrated as needed, and the weight K of each agglomerate is timed each time, and a password is required. , calibration by password.

In step S203, the load weight G of the agitation tank is detected. When the agitator loads the agglomerate at the mixing station, according to the amount of the agglomerate ordered by the customer, the corresponding amount of agglomerate is charged into the agitating tank, and the agglomerate is filled in the agitating tank, and the measurement is carried out. The weight of the stirred tank of the knot.

In step S204, the weight of the agglomerate in the stirred tank is calculated according to the formula T=GM! ¹ . After measuring the load weight G of the stirred tank, the weight T of the agglomerate in the stirred tank can be calculated according to the measured weight M of the stirred tank and according to the formula T=GM. In step S205, according to the formula V=T/K, the square quantity V of the agglomerates in the stirring tank is calculated, and K is the preset weight of each agglomerate. After calculating the weight T of the agglomerate in the stirred tank, according to the formula V=T/K, the square amount V of the agglomerate in the stirred tank can be calculated, and K is the calculated amount of each agglomerate in the above step. weight.

In a preferred embodiment, in order to allow the customer to more intuitively determine whether the amount of agglomerates in the agitating tank is consistent with a predetermined amount, step 205 further includes steps 206 and 207.

Step S206, it is judged whether the square amount V of the agglomerates in the stirring tank is consistent with the predetermined amount. Step S207, displaying and storing the amount V of the agglomerates in the agitating tank and the judgment result in the step 206.

The present invention also provides a method for detecting the amount of agglomerates in a tank, which is described in the following examples.

Referring to FIG. 3, FIG. 3 is a schematic view of the frame of the square detecting system for agglomerating in the stirring tank provided by the present invention.

As shown in FIG. 3, the method for detecting the agglomerate in the agitating tank provided by the present invention comprises: a detecting unit for detecting the weight of the stirring tank and emitting a weight signal;

The controller is configured to receive the weight signal and calculate the amount of agglomerates in the agitating tank by the method for detecting the agglomerates in the agitating tank.

In the preferred solution, the method further includes:

a judging unit, configured to determine whether the square quantity V of the agglomerates in the stirring tank is consistent with a predetermined amount;

a storage unit for storing the amount of agglomerates in the agitating tank V. The judgment result of the judging unit. The storage unit stores data such as the amount V of the agglomerate in the stirred tank and the result of the determination by the judging unit. The general personnel only allow browsing of the data, and only the person with specific authority can modify the data. Or delete, and you need to specify a password to modify, delete, etc. the data in the storage unit.

Since the method for detecting the amount of agglomerates in the agitating tank has the above technical effects, the square measuring system of the agglomerates in the stirring tank adopting the method should also have corresponding technical effects, and Details are introduced again.

The method for detecting the agglomerate in the stirring tank provided by the invention comprises a controller, a weight sensor of not less than one, the weight sensor is installed at the support point of the stirring tank, the weight signal output end of the weight sensor and the controller The weight signal receiving end is connected.

In a specific embodiment, the number of weight sensors is one. Referring to FIG. 4 and FIG. 5, the weight sensor can be installed at the support point of the first roller 21 of the agitating tank. In the preferred solution, the weight sensor can replace the first A roller 21 bearing, the weight sensor can simultaneously achieve the function of support and weight measurement. The weight sensor can also be mounted at the support point of the second roller 22 of the agitating tank. In the preferred embodiment, the weight sensor can replace the bearing of the second roller 22, and the weight sensor can simultaneously perform the functions of supporting and weighing. The weight sensor can also be mounted on the upper end surface of the support gantry 10 at the agitator reducer, and the front support point of the agitation tank abuts against the force receiving surface of the weight sensor. In a further aspect, the groove 11 may be disposed on the upper end surface of the support gantry 10 at the agitator reducer, the weight sensor is installed in the W groove 11, and the force surface of the weight sensor is slightly higher than that of the support gantry 10. The upper end surface ensures that the front end support point of the agitating tank completely abuts against the force receiving surface of the weight sensor; the height of the supporting gantry 10 can also be lowered, and the weight sensor is directly disposed on the upper end surface of the supporting gantry 10.

In this embodiment, a weight sensor is used to measure the weight of the agitating tank. Since the mixing tank has three support points, it can be understood that the weight measured by the weight sensor is not the actual weight of the agitating tank, and the weight obtained by the weight sensor can be used as The equivalent weight of the stirred tank, the controller adopts the equivalent weight, and calculates the amount of agglomerates in the stirred tank according to the above-described method for detecting the amount of agglomerates in the stirred tank.

In another specific embodiment, the number of weight sensors is two. Referring to FIG. 4 and FIG. 5, two weight sensors can be respectively installed at any two support points of the three support points of the mixing tank. The specific installation position and manner of the weight sensor are similar to those of the above embodiment, and will not be described in detail herein.

In this embodiment, two weight sensors are used to measure the weight of the agitating tank, and the controller receives two weight sensors to send a weight signal. Since the mixing tank has three supporting points, it can be understood that the sum of the weights measured by the two weight sensors Not the actual weight of the tank, two weights The sum of the weights detected by the sensor is used as the equivalent weight of the agitating tank, and the equivalent weight is used to calculate the amount of agglomerates in the agitating tank according to the above-described method for detecting the agglomerates in the agitating tank.

In the above two embodiments, when measuring the weight of the mixing tank, the mixer truck should be on a flat ground, so that the weight of the mixing tank measured by the weight sensor can be used as the equivalent weight of the mixing tank, if the mixer is uneven. On the ground, the tilting of the mixer may result in inaccurate measurement of the weight sensor, which in turn leads to inaccurate measurement of the amount of agglomerates in the stirred tank. Therefore, the most preferred solution is in the third tank. A weight sensor is installed at each support point, and the specific installation position and manner of the weight sensor are similar to the above embodiment, and will not be described in detail herein.

The controller receives the weight signals from the three weight sensors. The sum of the weight values measured by the three weight sensors is the weight of the mixing tank. Whether the mixer is on a level ground or uneven ground, the mixing tank can be accurately measured. Weight, the amount of agglomerates in the stirred tank was calculated according to the above-described method for measuring the amount of agglomerates in the stirred tank. This method has high measurement accuracy.

The technical effects of the square measuring device for agglomerating in the stirring tank provided by the present invention will be described below.

The present invention also provides a mixer truck equipped with the above-mentioned square amount detecting device for agglomerating in the stirring tank. Since the above-mentioned square amount detecting device of the agglomerate in the stirring tank has the above technical effects, the mounting is The above-mentioned mixer truck of the square measuring device of the agglomerate in the stirring tank should also have corresponding technical effects.

The above is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements without departing from the principles of the present invention. Retouching or variation, for example, the cutting ring may be part of the corresponding pipe, or may be a separate component with higher wear resistance; these improvements, finishes or variations are also considered to be within the scope of the invention.

Claims

Rights request

A method for detecting the amount of agglomerates in a stirred tank, comprising: step A: detecting the no-load weight of the stirred tank M;

Step B. Detecting the carrying capacity of the stirring tank G;

Step D. Calculate the square amount V of the agglomerates in the stirred tank according to the formula V=T/K, and K is the preset weight of each agglomerate.

The method for detecting the amount of agglomerates in a stirred tank according to claim 1, wherein after the step A and before the step B, the method further comprises:

Step A1. Detecting the full load weight of the stirred tank N;

The method for detecting the amount of agglomerates in a stirred tank according to claim 1 or 2, wherein the step D further comprises:

The method for detecting the amount of agglomerates in a stirred tank according to claim 3, wherein after step E, the method further comprises:

5. A method for detecting agglomerates in a stirred tank, comprising: a detecting unit for detecting the weight of the stirring tank and emitting a weight signal;

And a controller for receiving the weight signal and measuring the amount of agglomerates in the stirred tank according to the method for detecting the agglomerates in the stirred tank according to any one of claims 1-4.

The method for detecting agglomerates in a stirred tank according to claim 5, further comprising:

7. The method of detecting agglomerates in a stirred tank according to claim 6, characterized in that It also includes:

8. A measuring device for agglomerating agglomerates in a tank, comprising: a controller, a weight sensor having a quantity of not less than one; a controller for receiving a weight signal emitted by the weight sensor, and a method for detecting agglomerates in a stirred tank according to any one of claims 1 to 4, wherein a square amount V of agglomerates in the stirred tank is calculated; the weight sensor is installed at a support point of the stirring tank, The weight signal output of the weight sensor is coupled to the weight signal receiving end of the controller.

The method of detecting agglomerates in a stirred tank according to claim 8, wherein the weight sensor is installed at a support point of a roller of the agitating tank.

The apparatus for detecting agglomerates in a stirred tank according to claim 8 or 9, wherein the weight sensor is attached to an upper end surface of a support gantry at a stirred tank reducer, and the stirring tank is The front support point abuts against the force surface of the weight sensor.

A mixer truck, characterized in that the mixer truck has the square amount detecting device of the agglomerate in the stirred tank according to any one of claims 8-10.