阅读说明：本技术 一种液体原料计量组件、方法及自密实混凝土制备设备 (Liquid raw material metering assembly and method and self-compacting concrete preparation equipment ) 是由 杨兵忠 刘建芬 宋卫军 于 2021-08-20 设计创作，主要内容包括：本发明提出了一种液体原料计量组件、方法及自密实混凝土制备设备,涉及混凝土设备技术领域,液体原料计量组件包括：用于储存液体原料的容器、若干不同容积规格的计量容器、分流管、输料管路、回流管路、进料管路、出料管路、控制模块。容器内的液体原料首先通过分流管进入到计量容器内,而每个计量容器内所容纳的液体原料的体积为固定值,在需要时将一个或多个计量容器内的液体原料输送到搅拌机内,从而获得多种体积的液体原料。本申请提供一种新的计量方式,采用固定容积的计量容器对液体原料进行计量。(The invention provides a liquid raw material metering assembly, a method and self-compacting concrete preparation equipment, and relates to the technical field of concrete equipment, wherein the liquid raw material metering assembly comprises: the device comprises a container for storing liquid raw materials, a plurality of metering containers with different volume specifications, a flow dividing pipe, a material conveying pipeline, a return pipeline, a feeding pipeline, a discharging pipeline and a control module. The liquid material in the container firstly enters the metering containers through the shunt tubes, the volume of the liquid material contained in each metering container is a fixed value, and the liquid material in one or more metering containers is conveyed to the stirring machine when needed, so that a plurality of volumes of the liquid material are obtained. The application provides a new metering mode, adopts fixed volumetric metering container to measure liquid raw materials.)

1. A liquid feed metering assembly, comprising:

a container (10) for storing a liquid feedstock;

a plurality of metering containers (20) of different volumetric specifications, the metering containers (20) comprising N volumetric specifications: v1, V2, … …, Vn; the top of the metering container (20) is provided with a feeding valve (21) and an exhaust valve (23), the bottom of the metering container is provided with a discharge valve (22), and a first sensor (24) capable of sensing whether the liquid raw material is filled in the inner space is arranged in the metering container;

a shunt tube (30), a first end of which is provided with a first valve (31) and a second end of which is provided with a second valve (32); a plurality of discharging interfaces (33) which correspond to the metering containers (20) one by one are further arranged between the first end and the second end of the shunt pipe (30); the height of the shunt pipe (30) is higher than that of the container (10);

a material conveying pipeline (40) connected between the container (10) and the first valve (31), and a pump (41) for conveying materials is arranged on the material conveying pipeline;

a return line (50) connected between the container (10) and the second valve (32);

a first end of the feeding pipeline (60) is connected with a feeding valve (21) of the metering container (20), and a second end of the feeding pipeline is connected with a discharging interface (33) of the shunt pipe (30);

a discharge line (70) having a first end connected to a discharge valve (22) of the metering container (20) and a second end connected to a stirrer (80);

the control module (90) is respectively connected with the feeding valve (21), the discharging valve (22), the first valve (31), the second valve (32), the pump (41) and the exhaust valve (23) to control each part to execute corresponding actions, and is connected with the first sensor (24) to obtain a sensing signal of the first sensor (24).

2. The liquid material metering assembly of claim 1, wherein said liquid material metering assembly has a metering tank body (20a), said metering tank body (20a) having a baffle (20b) disposed therein; the partition plates (20b) partition the internal space of the metering box body (20a) to form a plurality of metering cavities; each metering cavity correspondingly forms a metering container (20).

3. The liquid material metering assembly of claim 1, wherein said diverter tube (30) is angled downwardly in a direction proximate the second end.

4. The liquid material metering assembly of claim 1, wherein the discharge line (70) is provided with a second sensor (71) for sensing whether the liquid material passes through the discharge line; the control module (90) is connected with the second sensor (71) to acquire a sensing signal of the second sensor (71).

5. The liquid material metering assembly of claim 1, wherein said delivery conduit (40) is further provided with a third sensor (42) for sensing whether liquid material passes through the conduit; when the third sensor (42) does not detect the passage of the liquid raw material within a predetermined time after the pump (41) is turned on, the control module (90) controls the pump (41) to be turned off.

6. The liquid material metering assembly of claim 1, wherein a liquid level alarm is further provided in the container (10); the liquid level alarm is used for generating an alarm when the liquid level inside the container (10) is lower than the liquid level lower limit value.

7. The liquid feed metering assembly of claim 1, wherein the liquid feed is water or a liquid admixture.

8. A self-compacting concrete production plant, characterized in that it comprises a liquid raw material metering assembly according to any one of claims 1 to 7.

9. A liquid material metering method applied to the liquid material metering assembly according to any one of claims 1 to 7, comprising:

step S101, the control module (90) controls the second valve (32) to be closed, the first valve (31) to be opened, the feeding valves (21) of all the metering containers (20) to be opened, the discharging valves (22) of all the metering containers (20) to be closed, and controls the pump (41) to suck the liquid raw materials in the container (10) to be injected into the shunt pipe (30), so that the liquid raw materials are injected into the metering containers (20) through the discharging interfaces (33) of the shunt pipe (30) until all the metering containers (20) are completely filled with the liquid raw materials; during the process of injecting the liquid raw material into the metering container (20), when the control module (90) detects that the corresponding metering container (20) is filled with the liquid raw material through the first sensor (24), closing the exhaust valve (23) of the corresponding metering container (20); otherwise, keeping the exhaust valve (23) of the corresponding metering container (20) in an open state;

step S102, after all the metering containers (20) are fully filled with the liquid raw materials, the control module (90) controls the pump (41) to be closed and controls the second valve (32) to be opened, so that the residual liquid raw materials in the shunt pipe (30) flow back into the container (10) through the return pipeline (50);

step S103, the control module (90) controls second valves (32) of a plurality of metering containers (20) to be opened according to the volume of the liquid raw materials added to the stirrer (80) as required, so that the liquid raw materials in the corresponding metering containers (20) are all discharged into the stirrer (80) through the discharge pipeline (70); wherein the volume of liquid feedstock required by the blender (80) is equal to the sum of the volumes of the metering vessels (20) that open the second valve (32).

10. The liquid material metering method according to claim 9, characterized by further comprising, after step S103, the steps of:

step S104, when the liquid raw material is required to be added to the stirrer (80) again, the control module (90) judges whether the volume of the liquid raw material required by the stirrer (80) at this time can be combined by the volume of the metering container (20) which is remained and stores the liquid raw material;

step S105, if the volume of the liquid raw materials required by the mixer (80) at this time can be combined by the volume of the metering container (20) with the residual liquid raw materials, controlling the second valve (32) corresponding to the metering container (20) to be opened, so that the liquid raw materials in the corresponding metering container (20) are all discharged into the mixer (80) through the discharge pipeline (70), and the sum of the volumes of the metering containers (20) discharged at this time is equal to the volume of the liquid raw materials required by the mixer (80) at this time;

if the volume of the liquid material required by the stirrer (80) cannot be combined with the volume of the measuring container (20) in which the liquid material remains at the present time, the process returns to step S101.

Technical Field

The application relates to the technical field of concrete equipment, in particular to a liquid raw material metering assembly and method and self-compacting concrete preparation equipment.

Background

Self-compacting concrete refers to concrete which can flow and be compact under the action of self gravity, can completely fill a template even if compact steel bars exist, and simultaneously obtains good homogeneity without additional vibration. The self-compacting concrete is widely applied to tunnel construction. The tunnel space is limited, and the requirement on the overall dimension of construction equipment is high. Chinese patent 201810105836.6 discloses a self-compacting concrete mixer is carried to finished product, and this finished product is carried self-compacting concrete mixer formula self-compacting concrete mixing equipment as an organic whole, with the storage, measurement, transport and the agitated vessel integration of the multiple material that self-compacting concrete needs together. In such integrated self-compacting concrete mixing equipment, raw materials need to be added into the mixer in a certain proportion, and the weighing device is used for carrying out mass measurement on various materials.

The liquid raw materials of self-compaction concrete includes water and liquid admixture, and self-compaction concrete mixing equipment adopts weighing device to measure to liquid raw materials mostly among the prior art, and efficiency is lower, the volume is great, be difficult for the miniaturization.

Disclosure of Invention

The technical problem that this application will solve lies in, to the above-mentioned not enough of prior art, provides a liquid raw materials measurement subassembly, method and self-compaction concrete preparation equipment.

This liquid raw materials metering component includes:

a container for storing a liquid feedstock;

a plurality of metering containers of different volumetric specifications, the metering containers comprising N volumetric specifications: v1, V2, … …, Vn; the top of the metering container is provided with a feeding valve and an exhaust valve, the bottom of the metering container is provided with a discharge valve, and the metering container is internally provided with a first sensor capable of sensing whether the liquid raw material is filled in the internal space;

the first end of the shunt pipe is provided with a first valve, and the second end of the shunt pipe is provided with a second valve; a plurality of discharging interfaces which correspond to the metering containers one by one are further arranged between the first end and the second end of the flow dividing pipe; the height of the shunt pipe is higher than that of the container;

a material conveying pipeline connected between the container and the first valve, and provided with a pump for conveying materials;

a return line connected between the container and the second valve;

the first end of the feeding pipeline is connected with a feeding valve of the metering container, and the second end of the feeding pipeline is connected with the discharge port of the flow dividing pipe;

a first end of the discharge pipeline is connected with a discharge valve of the metering container, and a second end of the discharge pipeline is connected with the stirrer;

and the control module is respectively connected with the feeding valve, the discharging valve, the first valve, the second valve, the pump and the exhaust valve so as to control each part to execute corresponding actions, and is connected with the first sensor so as to acquire a sensing signal of the first sensor.

In some improvements, the liquid material metering assembly has a metering tank body in which a partition is disposed; the partition plate partitions the internal space of the metering box body to form a plurality of metering cavities; each metering cavity correspondingly forms a metering container.

In some refinements, the shunt tube is sloped downwardly in a direction proximate the second end.

In some improved schemes, a second sensor used for sensing whether liquid raw materials pass through the pipeline or not is arranged on the discharge pipeline; the control module is connected with the second sensor so as to be capable of acquiring a sensing signal of the second sensor.

In some improved schemes, a third sensor used for sensing whether liquid raw materials pass through the pipeline or not is arranged on the material conveying pipeline; when the third sensor does not detect that the liquid raw material passes through within the preset time after the pump is started, the control module controls the pump to be closed.

In some improvement schemes, a liquid level alarm is also arranged in the container; the liquid level alarm is used for generating an alarm when the liquid level inside the container is lower than the liquid level lower limit value.

In some modifications, the liquid raw material is water or a liquid admixture.

On the other hand, the application also provides a self-compacting concrete preparation device which comprises the liquid raw material metering assembly.

On the other hand, the application also provides a liquid raw material metering method, which is applied to the liquid raw material metering assembly provided in the above section, and comprises the following steps:

step S101, a control module controls a second valve to be closed, a first valve to be opened, feeding valves of all metering containers to be opened and discharging valves of all metering containers to be closed, and controls liquid raw materials in a pumping container to be injected into a shunt pipe, so that the liquid raw materials are injected into the metering containers through a discharging interface of the shunt pipe until all the metering containers are fully filled with the liquid raw materials; in the process of injecting the liquid raw materials into the metering container, when the control module detects that the corresponding metering container is filled with the liquid raw materials through the first sensor, the exhaust valve of the corresponding metering container is closed; otherwise, keeping the exhaust valve of the corresponding metering container in an opening state;

step S102, after all the metering containers are fully filled with the liquid raw materials, the control module controls the pump to be closed and controls the second valve to be opened, so that the residual liquid raw materials in the shunt pipe flow back into the containers through the return pipeline;

step S103, the control module controls second valves of a plurality of metering containers to be opened according to the volume of the liquid raw materials added to the stirrer as required, so that the liquid raw materials in the corresponding metering containers are all discharged into the stirrer through a discharge pipeline; wherein the volume of liquid feedstock required by the blender is equal to the sum of the volumes of the metering vessels that open the second valve.

In some modifications, after step S103, the method further includes the steps of:

step S104, when the liquid raw materials are required to be added to the stirrer again, the control module judges whether the volume of the liquid raw materials required by the stirrer at this time can be formed by combining the volumes of the metering containers in which the liquid raw materials are remained;

step S105, if the volume of the liquid raw materials required by the mixer can be formed by combining the volumes of the metering containers with the residual liquid raw materials, controlling the second valve of the corresponding metering container to be opened, so that the liquid raw materials in the corresponding metering container are all discharged into the mixer through the discharge pipeline, and the sum of the volumes of the metering containers discharged at this time is equal to the volume of the liquid raw materials required by the mixer at this time;

if the volume of the liquid material required by the mixer cannot be combined with the volume of the measuring container in which the liquid material remains at the present time, the process returns to step S.

In the present application, the liquid material in the container is first introduced into the metering containers through the shunt tubes, and the volume of the liquid material contained in each metering container is a fixed value, and the liquid material in one or more metering containers is transferred to the stirring machine as needed, thereby obtaining a plurality of volumes of the liquid material. The technical scheme of the application has the following technical effects: first, the present application provides a new metering method for liquid raw materials, which employs a metering container with a fixed volume to meter the liquid raw materials. Secondly, need not to arrange weighing sensor, structural compacter, the volume that occupies is littleer. Thirdly, the metering containers with different volume specifications can be combined and metered to obtain liquid raw materials with various volumes. Fourthly, only liquid raw materials need to be filled into the metering container during metering, and the metering speed is high.

Drawings

FIG. 1 is a schematic diagram of a liquid material metering assembly according to an embodiment of the present application.

FIG. 2 is a block diagram of a liquid feed metering assembly in an embodiment of the present application.

FIG. 3 is a flow chart of a method for metering a liquid material in an embodiment of the present application.

Detailed Description

The following are specific embodiments of the present application and are further described with reference to the drawings, but the present application is not limited to these embodiments. In the following description, specific details such as specific configurations and components are provided only to help the embodiments of the present application be fully understood. Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

In addition, the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Referring to fig. 1 and 2, an embodiment of the present application provides a liquid material metering assembly, which includes: the device comprises a container 10 for storing liquid raw materials, a plurality of metering containers 20 with different volume specifications, a shunt pipe 30, a material conveying pipeline 40, a return pipeline 50, a feeding pipeline 60, a discharging pipeline 70 and a control module 90.

In the embodiments of the present application, the liquid raw material metering assembly is applied to an integrated self-compacting concrete mixing apparatus, particularly for storing and metering liquid raw materials, such as water and liquid admixture. In particular, the self-compacting concrete is concrete which can flow and compact under the action of self gravity, can completely fill a formwork even if compact reinforcing steel bars exist, and simultaneously obtains good homogeneity without additional vibration. The self-compacting concrete is prepared from raw materials including an additive, a cementing material and coarse and fine aggregates, and specifically comprises the following materials: stone, sand, cement, coal ash, liquid additive and solid additive. Wherein, the stones are coarse aggregates; sand is fine aggregate; the cement and the coal ash are powder materials. In some embodiments, the liquid admixture may be a water reducing agent. The integrated self-compacting concrete mixing plant integrates the storage, metering, conveying and mixing equipment of various materials required by the self-compacting concrete. In such integrated self-compacting concrete mixing equipment, raw materials need to be added into a mixer in a certain proportion, and various metering devices are used for carrying out quality metering on various materials. The integrated self-compacting concrete mixing device can be used for manufacturing self-compacting concrete on site.

The integrated self-compacting concrete mixing plant has a plant housing forming an external structure. The integrated self-compacting concrete stirring equipment is characterized in that a stirrer, a conveyor belt, a material box and a weighing device are arranged in an equipment shell. These conventional components are within the scope of the prior art and will not be described in detail herein. In the integrated self-compacting concrete mixing device, the liquid raw materials in the storage container are conveyed to the metering device for weighing and metering, so that the efficiency is low, the volume is large, and the miniaturization is difficult. Here, the liquid raw material is water or a liquid admixture.

In the present embodiment, the metering container 20 includes N volume specifications: v1, V2, … …, Vn; the top of the metering container 20 is provided with a feeding valve 21 and an exhaust valve 23, the bottom of the metering container is provided with a discharging valve 22, and a first sensor 24 capable of sensing whether the liquid raw materials are filled in the inner space is arranged in the metering container. The volume of the liquid material contained in each measuring vessel 20 is a fixed value, so that n volumes of the liquid materials V1, V2, … …, Vn can be directly obtained. In addition, the metering containers 20 with different volume specifications can be combined to obtain more volume specifications, for example, three metering containers 20 with three volume specifications of V1, V2 and V3 are respectively arranged, and the liquid raw material contained when the three metering containers 20 are filled is V1+ V2+ V3. Similarly, metering containers 20 with different volume specifications can be combined to obtain equal-volume specification types of V1+ V2, V3+ V4, V1+ V4+ V5.

A shunt tube 30 having a first valve 31 disposed at a first end thereof and a second valve 32 disposed at a second end thereof; the distributing pipe 30 is also provided with a plurality of discharging interfaces 33 which are in one-to-one correspondence with the metering containers 20 between the first end and the second end; the height of the shunt tube 30 is higher than the container 10. The feed line 40 is connected between the container 10 and the first valve 31, and a pump 41 for feeding is provided thereon. A return line 50 is connected between the vessel 10 and the second valve 32. The feed line 60 is connected at a first end to the feed valve 21 of the metering container 20 and at a second end to the outlet connection 33 of the dividing line 30. The discharge line 70 is connected at a first end to the discharge valve 22 of the metering container 20 and at a second end to the agitator 80. The control module 90 is respectively connected with the feeding valve 21, the discharging valve 22, the first valve 31, the second valve 32, the pump 41 and the exhaust valve 23 to control the components to perform corresponding actions, and is connected with the first sensor 24 to be capable of acquiring sensing signals of the first sensor 24.

When the liquid raw material needs to be filled into the metering container 20, the control module 90 controls the second valve 32 to be closed, the first valve 31 to be opened, the feeding valves 21 of all the metering containers 20 to be opened, the discharging valves 22 of all the metering containers 20 to be closed, and controls the pump 41 to suck the liquid raw material in the container 10 to be injected into the shunt pipe 30, so that the liquid raw material is injected into the metering container 20 through the discharging interface 33 of the shunt pipe 30 until all the metering containers 20 are completely filled with the liquid raw material. When the control module 90 detects that the corresponding metering container 20 is full of the liquid raw material through the first sensor 24 during the process of injecting the liquid raw material into the metering container 20, the exhaust valve 23 of the corresponding metering container 20 is closed; otherwise, the vent valve 23 of the corresponding metering container 20 is kept open. At this time, the liquid material in the container 10 is injected into the bypass pipe 30 through the feed line 40. The liquid feedstock is then injected into the metering vessel 20 through feed line 60. In any of the measuring containers 20, when the first sensor 24 detects that the corresponding measuring container 20 is not filled with the liquid material, the gas discharge valve 23 of the measuring container 20 is kept in an open state, and excess gas in the measuring container 20 is discharged through the gas discharge valve 23 during the process of injecting the liquid material into the measuring container 20.

Note that, for each of the metering containers 20, a feed valve 21, an exhaust valve 23, a discharge valve 22, and a first sensor 24 are provided. When the control module 90 detects that the corresponding metering container 20 is full of the liquid raw material through the first sensor 24 during the process of injecting the liquid raw material into the metering container 20, the exhaust valve 23 of the corresponding metering container 20 is closed; otherwise, the vent valve 23 of the corresponding metering container 20 is kept open. Specifically, when the first sensor 24 of the No. 1 measuring container 20 detects that the No. 1 measuring container 20 has been filled with the liquid raw material, the exhaust valve 23 of the No. 1 measuring container 20 is closed to prevent the liquid raw material from overflowing. When the first sensor 24 of the No. 2 measuring container 20 detects that the No. 2 measuring container 20 is not filled with the liquid raw material, the exhaust valve 23 of the No. 2 measuring container 20 is kept in an open state, so that the liquid raw material can smoothly enter the No. 2 measuring container 20. During the process of filling the metering container 20 with the liquid material, closing the exhaust valve 23 of the metering container 20 every time one metering container 20 is filled; when all the metering containers 20 are filled, the vent valves 23 of all the metering containers 20 are closed.

After all of the metering containers 20 are filled with liquid material, the control module 90 controls the pump 41 to close and the second valve 32 to open, so that the residual liquid material in the tap 30 is returned to the container 10 through the return line 50. In some embodiments, the shunt tube 30 is sloped downwardly in a direction proximate the second end such that liquid material remaining in the shunt tube 30 can flow downwardly in the direction of the slope of the shunt tube 30 and thus into the return line 50 back into the vessel 10.

When the liquid raw materials are required to be added into the stirrer 80, the control module 90 controls the second valves 32 of the plurality of metering containers 20 to be opened according to the volume of the liquid raw materials required to be added into the stirrer 80, so that the liquid raw materials in the corresponding metering containers 20 are all discharged into the stirrer 80 through the discharge pipeline 70; wherein the volume of liquid feedstock required by blender 80 is equal to the sum of the volumes of metering vessel 20 that open second valve 32. Specifically, when the volume of the liquid raw material to be added is V, the control module 90 matches the metering container 20 according to the volume V, and when the volume V is equal to the volume of any one of the metering containers 20, controls the second valve 32 of the metering container 20 to be opened; when the volume V is equal to the sum of the volumes of the plurality of metered containers 20, the control module 90 selects the second valve 32 of the corresponding plurality of metered containers 20 to open. In a specific example, the volume V may be obtained by a combination of one metering container 20 having a volume V1 and one metering container 20 having a volume V2.

After the liquid material is added to the agitator 80 several times, when the liquid material to be added to the agitator 80 again is required, the control module 90 determines whether or not the volume of the liquid material required by the agitator 80 at this time can be combined with the volume of the measuring container 20 in which the liquid material remains. Specifically, the measuring container 20 includes a measuring container No. 1 20, a measuring container No. 2 20, a measuring container No. 3 20, and a measuring container No. 4 20 in terms of volume specification. Wherein the volume of the No. 1 measuring container 20 is V1, the volume of the No. 2 measuring container 20 is V2, the volume of the No. 3 measuring container 20 is V3, and the volume of the No. 4 measuring container 20 is V4, wherein the No. 4 measuring container 20 is emptied when the liquid raw material is added into the stirring machine 80 at the last time, and the No. 1 measuring container 20, the No. 2 measuring container 20, and the No. 3 measuring container 20 are filled with the liquid raw material.

If the liquid material volume required by the mixer 80 at this time can be combined with the volume of the metering container 20 in which the liquid material remains, the second valve 32 of the corresponding metering container 20 is controlled to open, so that the liquid material in the corresponding metering container 20 is completely discharged into the mixer 80 through the discharge pipe 70, and the sum of the volumes of the metering containers 20 discharged at this time is equal to the liquid material volume required by the mixer 80 at this time; if the volume of the liquid material required by the stirrer 80 cannot be combined with the volume of the measuring container 20 in which the liquid material remains, the liquid material is replenished to the measuring container 20. Specifically, for example, if the volume of the liquid material required at this time is equal to the sum of the volumes of the metering containers No. 1 and No. 2 20, the second valves 32 of the metering containers No. 1 and No. 2 20 are controlled to be opened.

In some embodiments, the liquid feedstock metering assembly has a metering tank 20a with a baffle 20b disposed within the metering tank 20 a; the partition plates 20b partition the internal space of the metering box body 20a to form a plurality of metering cavities; each of which forms a corresponding one of the metering containers 20. So arranged, the metering container 20 is more compact in space.

In some embodiments, the discharge line 70 is provided with a second sensor 71 for sensing whether the liquid material passes through the pipe; the control module 90 is connected with the second sensor 71 to obtain a sensing signal of the second sensor 71. During discharge of the second valve 32 into the blender 80, the second sensor 71 senses the passage of liquid material through the pipeline. After the discharge is completed, the control module 90 detects that no liquid material passes through the pipeline through the second sensor 71, and at this time, the control module 90 controls the corresponding second valve 32 to close.

In some embodiments, the feeding pipeline 40 is further provided with a third sensor 42 for sensing whether the liquid material passes through the pipeline; when the third sensor 42 does not detect the passage of the liquid material for a predetermined time after the pump 41 is turned on, the control module 90 controls the pump 41 to be turned off, thereby preventing the pump 41 from idling for a long time.

In some embodiments, a liquid level alarm is also provided within the container 10; the liquid level alarm is used for generating an alarm when the liquid level inside the container 10 is lower than the lower limit value of the liquid level, so that the container 10 is ensured to always keep enough liquid raw materials.

Referring to fig. 3, the control module 90 is respectively connected to the feeding valve 21, the discharging valve 22, the first valve 31, the second valve 32, the pump 41, and the exhaust valve 23 to control the components to perform corresponding actions, and is connected to the first sensor 24, the second sensor 71, and the third sensor 42 to obtain sensing signals of the sensors. The sensors may be ultrasonic sensors or infrared sensors.

In the present embodiment, the liquid material in the container 10 is first introduced into the metering containers through the shunt tubes, and the volume of the liquid material contained in each metering container is a fixed value, and the liquid material in one or more metering containers is transferred to the mixer as needed, thereby obtaining a plurality of volumes of the liquid material. The technical scheme of the application has the following technical effects: first, the present application provides a new metering method for liquid raw materials, which employs a metering container with a fixed volume to meter the liquid raw materials. Secondly, need not to arrange weighing sensor, structural compacter, the volume that occupies is littleer. Thirdly, the metering containers with different volume specifications can be combined and metered to obtain liquid raw materials with various volumes. Fourthly, only liquid raw materials need to be filled into the metering container during metering, and the metering speed is high.

Referring to fig. 3, the present application further proposes a liquid material metering method, which is applied to the liquid material metering assembly proposed in the above section, and includes at least steps S101 to S103.

Step S101, the control module 90 controls the second valve 32 to close, the first valve 31 to open, the feeding valves 21 of all the metering containers 20 to open, and the discharging valves 22 of all the metering containers 20 to close, and controls the pump 41 to suck the liquid material in the container 10 and inject the liquid material into the diversion pipe 30, so that the liquid material is injected into the metering container 20 through the discharging port 33 of the diversion pipe 30 until all the metering containers 20 are completely filled with the liquid material; when the control module 90 detects that the corresponding metering container 20 is full of the liquid raw material through the first sensor 24 during the process of injecting the liquid raw material into the metering container 20, the exhaust valve 23 of the corresponding metering container 20 is closed; otherwise, keeping the exhaust valve 23 of the corresponding metering container 20 in an open state;

step S102, after all the metering containers 20 are completely filled with the liquid material, the control module 90 controls the pump 41 to be closed and controls the second valve 32 to be opened, so that the residual liquid material in the diversion pipe 30 flows back into the container 10 through the return pipe 50;

step S103, the control module 90 controls the second valves 32 of the plurality of measuring containers 20 to be opened according to the volume of the liquid raw materials added to the stirrer 80 as required, so that the liquid raw materials in the corresponding measuring containers 20 are all discharged into the stirrer 80 through the discharge pipeline 70; wherein the volume of liquid feedstock required by blender 80 is equal to the sum of the volumes of metering vessel 20 that open second valve 32.

It should be understood that, in the embodiment of the present application, step S101 to step S103 are performed in order.

In some embodiments, after step S103, the method further comprises the steps of:

step S104, when the liquid material needs to be added to the mixer 80 again, the control module 90 determines whether the volume of the liquid material required by the mixer 80 at this time can be combined with the volume of the metering container 20 in which the liquid material remains;

step S105, if the volume of the liquid raw material required by the mixer 80 at this time can be combined by the volume of the metering container 20 with the residual liquid raw material, controlling the second valve 32 of the corresponding metering container 20 to open, so that the liquid raw material in the corresponding metering container 20 is completely discharged into the mixer 80 through the discharge pipeline 70, and the sum of the volumes of the metering containers 20 discharged at this time is equal to the volume of the liquid raw material required by the mixer 80 at this time;

in step S106, if the volume of the liquid material required by the stirrer 80 cannot be combined with the volume of the measuring container 20 in which the liquid material remains, the process returns to step S101.

The liquid material metering method provided by the present embodiment is applied to the liquid material metering assembly provided in the previous section, and related contents can be referred to in the previous section, and are not described herein again.

In addition, the embodiment of the application also provides a self-compacting concrete preparation device which comprises the liquid raw material metering assembly.

In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The specific embodiments described herein are merely illustrative of the spirit of the application. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the present application as defined by the appended claims.