WO2020253159A1

WO2020253159A1 - Liquid metering device, metering and feeding system and mixing station

Info

Publication number: WO2020253159A1
Application number: PCT/CN2019/124998
Authority: WO
Inventors: 朱双明; 龙昕; 聂拓
Original assignee: 三一汽车制造有限公司
Priority date: 2019-06-21
Filing date: 2019-12-13
Publication date: 2020-12-24

Abstract

A liquid metering device, a metering and feeding system and a mixing station. The liquid metering device comprises: a first metering hopper (102), a second metering hopper (104) and a first weighing sensor (106) for weighing the first metering hopper (102) and the second metering hopper (104) together. The second metering hopper (104) is in communication with the first metering hopper (102) by means of an overflow port provided at the upper part or the top of the second metering hopper; a first discharge pipe (108) is connected to a bottom outlet of the first metering hopper (102), and a first switch valve (110) is provided on the first discharge pipe (108); and a second discharge pipe (112) is connected to a bottom outlet of the second metering hopper (104), and a second switch valve (114) is provided on the second discharge pipe (112). The liquid metering device can dilute an admixture by means of water, and can deduct water individually, and the amount of admixture fed is not affected in the process of water deduction, thereby guaranteeing the accurate ratio of each raw material and guaranteeing the quality of a finally produced product.

Description

Liquid metering device, metering delivery system and mixing station

This application requires that it be submitted to the Chinese Patent Office on June 21, 2019, the application number is "201910541120.5", the invention name is "Liquid Metering Device, Metering System and Mixing Station", and the application is submitted to the China Patent Office on June 21, 2019 The priority of the Chinese patent application with the number "201920940129.9" and the invention title "liquid metering device, metering system and mixing station", the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the technical field of engineering machinery, and specifically to a liquid metering device, a metering delivery system and a mixing station.

Background technique

The water and admixture metering system is an important part of the concrete mixing plant. In order to improve the use effect of the admixture, often the mixing station places the admixture metering hopper above the water metering hopper, and the measured admixture in the admixture metering hopper is first discharged into the water metering hopper for premixing to form an admixture solution, and then The admixture solution in the water metering hopper is put into the mixer and mixed with aggregate and powder to make concrete. However, in actual production, because the moisture content of the aggregate fluctuates, the amount of water is deducted during the production process. The deduction is performed by controlling the amount of additive solution in the water metering hopper. At this time, the additive will be added at the same time. Also deducted, causing fluctuations in the quality of concrete products.

Summary of the invention

This application aims to solve at least one of the technical problems existing in the prior art.

The first aspect of the application proposes a liquid metering device.

For this reason, the second aspect of this application proposes a metered delivery system.

The third aspect of this application proposes a mixing station.

The first aspect of this application proposes a liquid metering device, which includes: a first metering bucket, a second metering bucket, and a first weighing sensor that weighs the first metering bucket and the second metering bucket together, the first metering bucket and The second weighing hoppers are fixedly arranged so that the first weighing sensor can weigh the first weighing hopper and the second weighing hopper together. The second metering hopper is connected to the first metering hopper through an overflow port provided on the upper or top of the second metering hopper. The bottom outlet of the first metering hopper is connected with a first discharge pipe, and the first discharge pipe is provided with a first on-off valve. The bottom outlet of the second metering hopper is connected with a second discharge pipe, and a second switch valve is arranged on the second discharge pipe.

The liquid metering device proposed in the present application is provided with a first metering hopper and a second metering hopper that are communicated with each other through an overflow, wherein, when the liquid level in the second metering hopper reaches the position of the overflow, the second metering hopper The liquid inside can flow to the first weighing hopper through the overflow; the first weighing hopper is provided with a first weighing sensor for weighing the first weighing hopper and the second weighing hopper, and the first weighing sensor is used for The first measuring hopper and the second measuring hopper and the liquid materials in the two are weighed; the bottom of the first measuring hopper is provided with a first discharge pipe, and the bottom of the second measuring hopper is provided with a second discharge pipe. In the actual production process, the amount of admixture is less than water, and the amount of admixture has a very important impact on product quality. In the production process, first put water into the second measuring hopper, and when the second measuring hopper When the liquid level reaches the overflow, the water in the second metering hopper flows to the first metering hopper. After the water metering is completed, a predetermined amount of admixture is put into the first metering hopper. The water inside is mixed as an additive solution. At this time, the additive solution is stored in the first measuring hopper, and water is stored in the second measuring hopper.

When water deduction is required, first open the first on-off valve and close the second on-off valve. After the admixture solution in the first metering hopper is completely poured, then open the second on-off valve and put the water stored in the second metering hopper. ; In the process of putting the water stored in the second metering bucket, the water can be deducted by controlling the closing of the second on-off valve according to the actual situation. At this time, since the admixture solution has been completely put in, the deduction of water will not be performed Affect the amount of additives. When the water deduction treatment is not required, the first on-off valve and the second on-off valve can be opened at the same time to ensure the delivery speed. In addition, in the water metering process, the first weighing sensor can weigh the water in the first metering hopper and the water in the second metering hopper at the same time to ensure the accuracy of the water consumption and the final product quality. Specifically, the first load cell adopts a suspended load cell, which is located above the first weighing bucket and is connected to the first weighing bucket and/or the second weighing bucket.

The liquid metering device proposed in this application can not only dilute the admixture with water, but also deduct the water separately, and will not affect the amount of the admixture during the deduction process, and can ensure the accuracy of the proportion of each raw material and ensure the final The quality of the products produced.

According to the above-mentioned liquid metering device of this application, it may also have the following additional technical features:

In a possible design, the second measuring bucket is fixedly arranged inside the first measuring bucket, and the second measuring bucket and the first measuring bucket may share at least one bucket wall.

In this design, in order to achieve the simplification of the structure and reduce the use space of the liquid metering device, the second metering bucket is arranged inside the first metering bucket, and the second metering bucket and the first metering bucket share at least one bucket wall To reduce material costs.

In a possible design, the second discharge pipe passes through the bottom wall of the first metering hopper and is connected to the bottom outlet of the second metering hopper, and the second switch valve is arranged on the second discharge pipe outside the first metering hopper. On the pipe section.

In this design, the second discharge tube passes through the bottom wall of the first metering hopper to communicate with the second metering hopper to ensure the delivery of water; the second on-off valve is set on the second discharge tube outside the first metering hopper. On the pipe section, the second on-off valve is arranged outside the first metering hopper and will not be immersed in the liquid in the first metering hopper. The second on-off valve is not easy to be damaged and is also convenient for operation and maintenance.

In a possible design, the top of the second metering bucket is an open structure, and the overflow is the top opening of the second metering bucket, and the top of the second metering bucket is lower than the top of the first metering bucket.

In this design, in order to simplify the structure and improve the manufacturing and processing efficiency of the liquid metering device to reduce costs, the top of the second metering bucket is an open structure, and the top opening of the second metering bucket is directly used as an overflow port. When the liquid level in the second metering bucket reaches the overflow port, the water can flow into the first metering bucket through the overflow port.

The second aspect of the application proposes a metering and dispensing system, including: a first feeding device, a second feeding device, and a liquid metering device as in any one of the first aspect of the application, wherein the outlet of the first feeding device and the first feeding device The inlet of a metering bucket is connected, and the outlet of the second feeding device is connected with the inlet of the second metering bucket.

The metering system proposed in this application has all the beneficial effects of the above-mentioned liquid metering device because it has the liquid metering device of any one of the first aspect of this application. In addition, the outlet of the first dosing device is connected with the inlet of the first metering hopper to ensure the dosing of the admixture; the outlet of the second dosing device is connected with the inlet of the second dosing hopper to ensure the dosing of water.

Specifically, in the process of use, first put a predetermined amount of water into the second metering hopper through the second feeding device, and when the liquid level in the second metering hopper reaches the overflow, the water in the second metering hopper flows to The first metering hopper, after the water metering is completed, puts a predetermined amount of admixture into the first metering hopper through the first feeding device, and the admixture is mixed with the water in the first metering hopper to form an admixture solution. When water deduction is required, first open the first on-off valve and close the second on-off valve. After the admixture solution in the first metering hopper is completely poured, then open the second on-off valve and put the water stored in the second metering hopper. In the process of putting the water stored in the second measuring bucket, the water deduction can be performed by controlling the closing of the second on-off valve according to the actual situation. At this time, since the admixture solution has been completely put in, the water deduction will not be performed. Affect the dosage of the admixture; when the water deduction treatment is not required, the first on-off valve and the second on-off valve can be opened at the same time to ensure the delivery speed.

According to the above-mentioned metering and placing system of this application, it may also have the following additional technical features:

In a possible design, the first feeding device includes a third metering hopper and a second load cell for weighing the third metering hopper. The bottom outlet of the third metering hopper is connected with a third discharge pipe. The outlet of the discharge pipe is communicated with the inlet of the first metering hopper, and a third switch valve is arranged on the third discharge pipe.

In this design, since the admixture is injected through the first dosing device, the admixture is less in actual operation. For ease of operation, a third metering bucket and a third discharge pipe are arranged above the first metering bucket. Wherein, the outlet of the third discharge pipe is communicated with the inlet of the first metering hopper. When adding the admixture, directly put the admixture into the third metering hopper, and the admixture can enter the first metering hopper through the third discharge pipe. In order to ensure the precise ratio of the raw materials and ensure the quality of the final product, the third weighing hopper is equipped with a second weighing sensor and a third on-off valve. The second weighing sensor is used to detect the quality of the materials in the third weighing hopper. The third on-off valve is used to open or close the third discharge pipe. When the additive is put into the third metering hopper, the third on-off valve closes the third discharge pipe first, and then the weight of the additive in the third metering hopper is weighed by the second load cell. When the quality of the admixture reaches the predetermined value, stop adding the admixture into the third metering hopper to ensure that the admixture is put in the predetermined amount. When the first feeding device drops the admixture into the first metering hopper, the third on-off valve is opened, and the admixture in the third metering hopper is injected into the first metering hopper through the third discharge pipe.

Specifically, the second load cell adopts a suspended load cell, and the suspended load cell is located above and connected to the third weighing bucket.

In a possible design, the third metering hopper is located above the first metering hopper, and the third on-off valve is arranged on the pipe section of the third discharge pipe outside the first metering hopper.

In this design, the third metering hopper is located above the first metering hopper to ensure the dosing of the admixture; the third on-off valve is arranged on the pipe section of the third discharge pipe outside the first metering hopper, so that the third on-off valve is exposed It is located outside the first measuring hopper for easy operation.

In a possible design, a discharging pipeline is arranged under the first metering hopper, and the outlet of the first discharging tube and the outlet of the second discharging tube are connected with the discharging pipeline.

In this design, the metering system is also provided with a discharging pipeline. The discharging pipeline is connected with the first discharge pipe and the second discharge pipe respectively. The outlet end of the discharging pipeline is connected to the mixer and flows along the liquid. In the direction, the discharging pipeline is connected with the second discharge pipe first, and then with the first discharge pipe.

When water deduction is not required, the admixture mixture enters the discharge pipe through the first discharge pipe, and the water enters the discharge pipe through the second discharge pipe. At this time, it can be inside and outside the discharge pipe. The additive mixture is further diluted and mixed to ensure the final product quality.

When water deduction is required, the admixture mixture is put into the mixer through the first discharge pipe and the discharge pipe, and the water enters the discharge pipe through the second discharge pipe and passes through the discharge pipe. Put it into the mixer, at this time, the water can play the role of cleaning the feeding pipeline, avoid the residue of the additive, and prevent the additive from corroding the feeding pipeline.

The third aspect of the present application proposes a mixing station, including: the liquid metering device according to any one of the first aspect of the present application; or the metering delivery system according to any one of the second aspect of the present application.

The mixing station proposed in the third aspect of this application includes the liquid metering device according to any one of the first aspect of this application; or the metering system according to any one of the second aspect of this application, so it has the above liquid metering device or metering All the beneficial effects of the delivery system will not be stated here.

The additional aspects and advantages of the present application will become obvious in the following description, or be understood through the practice of the present application.

Description of the drawings

The above and/or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Figure 1 is a schematic structural diagram of a liquid metering device according to an embodiment of the present application;

Figure 2 is a schematic structural diagram of a metering system according to an embodiment of the present application.

Among them, the corresponding relationship between the reference signs and component names in Figures 1 and 2 is:

102 first metering hopper, 104 second metering hopper, 106 first load cell, 108 first discharge pipe, 110 first switch valve, 112 second discharge pipe, 114 second switch valve, 200 first feeding device , 202 third metering hopper, 204 second load cell, 206 third discharge pipe, 208 third on-off valve, 300 second feeding device, 400 discharge pipeline.

Detailed ways

The following describes the liquid metering device, metering delivery system, and mixing station according to some embodiments of the present application with reference to FIGS. 1 and 2.

The embodiment of the first aspect of the present application proposes a liquid metering device, as shown in FIG. 1, including: a first metering bucket 102, a second metering bucket 104, and the first metering bucket 102 and the second metering bucket 104 are collectively called The heavy first weighing sensor 106, the first weighing hopper 102 and the second weighing hopper 104 are fixedly arranged, so that the first weighing sensor 106 weighs the first weighing hopper 102 and the second weighing hopper 104 together. The second metering hopper 104 communicates with the first metering hopper 102 through an overflow port arranged at the upper or top of the first metering hopper 102. The bottom outlet of the first metering hopper 102 is connected to a first discharge pipe 108, and the first discharge pipe 108 is provided A second discharge pipe 112 is connected to the bottom outlet of the first switch valve 110 and the second metering hopper 104, and a second switch valve 114 is provided on the second discharge pipe 112.

The liquid metering device proposed in the present application is provided with a first metering bucket 102 and a second metering bucket 104 which are communicated with each other through an overflow port. When the liquid level in the second metering bucket 104 reaches the position of the overflow port, the The liquid in the second weighing hopper 104 can flow to the first weighing hopper 102 through the overflow; the first weighing hopper 102 is provided with a first load cell 106 for weighing the first weighing hopper 102 and the second weighing hopper 104 together , The first weighing sensor 106 is used to weigh the liquid materials in the first weighing hopper 102, the second weighing hopper 104 and both; the bottom of the first weighing hopper 102 is provided with a first discharge pipe 108, and the second The bottom of the measuring hopper 104 is provided with a second discharge pipe 112. In the actual production process, the amount of additives is less than water, and the amount of additives has a very important impact on product quality. Therefore, in the production process, first put water into the second metering bucket 104; when the liquid level in the second metering bucket 104 reaches the overflow, the water in the second metering bucket 104 flows to the first metering bucket 102. After the water measurement is completed, a predetermined amount of admixture is put into the first metering bucket 102, and the admixture is mixed with the water in the first metering bucket 102 to form an admixture solution. At this time, the additive solution is stored in the first measuring hopper 102, and water is stored in the second measuring hopper 104.

When water deduction treatment is needed, first open the first on-off valve 110 and close the second on-off valve 114, and after the admixture solution in the first metering bucket 102 is completely poured, then open the second on-off valve 114 to put into the second metering bucket Water stored in 104; in the process of putting the water stored in the second metering bucket 104, the water can be deducted by controlling the closing of the second on-off valve 114 according to the actual situation. At this time, since the admixture solution has been completely injected, Water deduction treatment will not affect the amount of additives. When the water deduction treatment is not required, the first on-off valve 110 and the second on-off valve 114 can be opened at the same time to ensure the delivery speed. In addition, during the water measurement process, the first weighing sensor 106 can weigh the water in the first weighing hopper 102 and the water in the second weighing hopper 104 at the same time to ensure the accuracy of the water consumption and the quality of the final product. . Specifically, the first load cell 106 is a suspended load cell, which is located above the first weighing bucket 102 and is connected to the first weighing bucket 102 and/or the second weighing bucket 104.

The liquid metering device proposed in this application can not only dilute the admixture with water, but also deduct the water separately, and will not affect the amount of the admixture during the deduction process, and can ensure the accuracy of the proportion of each raw material and ensure the final Product quality.

In an embodiment of the present application, as shown in FIG. 1, the second measuring bucket 104 is fixedly arranged inside the first measuring bucket 102, and the second measuring bucket 104 and the first measuring bucket 102 share at least one bucket wall.

In this embodiment, in order to simplify the structure and reduce the use space of the liquid metering device, the second metering bucket 104 is arranged inside the first metering bucket 102, and the second metering bucket 104 and the first metering bucket 102 share at least A bucket wall to reduce material costs.

In an embodiment of the present application, as shown in FIG. 1, the second discharge pipe 112 passes through the bottom wall of the first metering hopper 102 and is connected to the bottom outlet of the second metering hopper 104, and the second on-off valve 114 is arranged at The second discharge pipe 112 is located on the pipe section outside the first metering hopper 102.

In this embodiment, the second discharge pipe 112 passes through the bottom wall of the first metering hopper 102 to communicate with the second metering hopper 104 to ensure the delivery of water; the second on-off valve 114 is located at the second discharge pipe 112. On the pipe section outside the first metering hopper 102, the second on-off valve 114 is arranged outside the first metering hopper 102 and will not be immersed in the liquid in the first metering hopper 102. The second on-off valve 114 is not easy to damage and is also convenient for operation and maintenance.

In an embodiment of the present application, the top of the second metering bucket 104 is an open structure, and the overflow port is the top opening of the second metering bucket 104, and the top of the second metering bucket 104 is lower than the first metering bucket 104. The top of bucket 102.

In this embodiment, in order to simplify the structure and improve the manufacturing and processing efficiency of the liquid metering device to reduce costs, the second metering bucket 104 has an open structure, and the top opening of the second metering bucket 104 is directly used as an overflow port. When the liquid level in the second metering bucket 104 reaches the overflow port, the water can flow into the first metering bucket through the overflow port.

The embodiment of the second aspect of the present application proposes a metering and dispensing system, as shown in FIG. 2, including: a first feeding device 200, a second feeding device 300, and any one of the embodiments of the first aspect of the application A liquid metering device, wherein the outlet of the first feeding device 200 is connected to the inlet of the first metering hopper 102, and the outlet of the second feeding device 300 is connected to the inlet of the second metering hopper 104.

The metering system proposed in this application has all the beneficial effects of the above-mentioned liquid metering device because it has the liquid metering device of any one of the embodiments of the first aspect of this application. In addition, the outlet of the first dosing device 200 is connected to the inlet of the first metering hopper 102 to ensure the dosing of the admixture; the outlet of the second dosing device 300 is connected to the inlet of the second dosing hopper 104 to ensure the dosing of water.

Specifically, during use, a predetermined amount of water is first put into the second metering hopper 104 through the second feeding device 300. When the liquid level in the second metering hopper 104 reaches the overflow, the second metering hopper 104 The water flows to the first metering hopper 102. After the water metering is completed, a predetermined amount of admixture is put into the first metering hopper 102 through the first feeding device 200, and the admixture is mixed with the water in the first metering hopper 102 to form Additive solution. When water deduction treatment is needed, first open the first on-off valve 110 and close the second on-off valve 114, and after the admixture solution in the first metering bucket 102 is completely poured, then open the second on-off valve 114 to put into the second metering bucket Water stored in 104. In the process of putting the water stored in the second metering bucket 104, the water deduction can be performed by controlling the closing of the second on-off valve 114 according to the actual situation. At this time, since the admixture solution has been completely injected, the water deduction process is not necessary. It will affect the amount of admixture; when water deduction is not required, the first on-off valve 110 and the second on-off valve 114 can be opened at the same time to ensure the delivery speed.

In an embodiment of the metering and dispensing system of the present application, as shown in Figure 2, the first feeding device 200 includes a third metering hopper 202 and a second load cell 204 for weighing the third metering hopper 202. The bottom outlet of the measuring hopper 202 is connected with a third discharge pipe 206, the outlet of the third discharge pipe 206 is connected with the inlet of the first measuring hopper 102, and a third on-off valve 208 is provided on the third discharge pipe 206.

In this embodiment, since the admixture is injected through the first dosing device 200, in actual operation, the admixture uses less material. For ease of operation, a third metering bucket 202 and a third discharge pipe 206 are provided above the first metering bucket 102. Wherein, the outlet of the third discharge pipe 206 is communicated with the inlet of the first metering hopper 102. When the additive is put in, the additive is put into the third metering hopper 202, and the additive can enter the first metering hopper 102 through the third discharge pipe 206. In order to ensure the precise ratio of the raw materials and ensure the quality of the final product, the third weighing hopper 202 is provided with a second weighing sensor 204 and a third on-off valve 208, and the second weighing sensor 204 is used to detect the third weighing hopper 202 The third switch valve 208 is used to open or close the third discharge pipe 206. When the admixture is put into the third metering hopper 202, the third on-off valve 208 closes the third discharge pipe 206, and the mass of the admixture is weighed by the second load cell 204. When the mass reaches a predetermined value, the third switch valve The metering hopper 202 puts the additive to ensure that the additive is put in a predetermined amount. When the first feeding device 200 puts the admixture into the first metering hopper 102, the third switch valve 208 is opened, and the admixture in the third metering hopper 202 is injected into the first metering hopper 102 through the third discharge pipe 206.

Specifically, the second load cell 204 adopts a suspended load cell, which is located above the third weighing bucket 202 and connected to the third weighing bucket 202.

In an embodiment of the metering system of the present application, as shown in FIG. 2, the third metering hopper 202 is located above the first metering hopper 102, and the third on-off valve 208 is provided on the third discharge pipe 206 at the first On the pipe section outside the metering bucket 102.

In this embodiment, the third metering hopper 202 is located above the first metering hopper 102 to ensure the dosing of the admixture; the third on-off valve 208 is arranged on the pipe section of the third discharge pipe 206 outside the first metering hopper 102, The third switch valve 208 is exposed outside the first metering bucket 102, which is convenient for operation.

In an embodiment of the metering system of the present application, as shown in FIG. 2, a discharging pipeline 400 is provided below the first metering hopper 102, the outlet of the first discharge pipe 108 and the second discharge pipe 112 The outlet is communicated with the unloading pipeline 400.

In this embodiment, the metering system is also provided with a discharging pipeline 400, the discharging pipeline 400 is respectively communicated with the first discharging pipe 108 and the second discharging pipe 112, and the outlet end of the discharging pipeline 400 is connected Agitator, and along the liquid flow direction, the discharging pipeline 400 is first connected with the second discharge pipe 112 and then with the first discharge pipe 108.

When water deduction is not required, the admixture mixture enters the discharge pipe 400 through the first discharge pipe 108, and the water enters the discharge pipe through the second discharge pipe 112. At this time, it can be in the discharge pipe. The mixture of external additives inside the road 400 is further diluted and mixed to ensure the quality of the final product.

When water deduction is required, the admixture mixture is put into the mixer through the first discharge pipe 108 and the discharge pipe 400, and then the water enters the discharge pipe 400 through the second discharge pipe 112 and passes through The feeding pipeline 400 is put into the mixer. At this time, the water can play the role of cleaning the feeding pipeline 400 to avoid the residue of the additive and prevent the additive from corroding the feeding pipeline 400.

The embodiment of the third aspect of the present application proposes a mixing station, including: the liquid metering device according to any one of the first aspect of the present application; or the metering delivery system of any one of the embodiments of the second aspect of the present application.

The mixing station proposed in the embodiment of this application includes the liquid metering device as in any one of the embodiments of the first aspect of this application; or includes the metering and dispensing system as in any one of the embodiments of the second aspect of this application, so It has all the beneficial effects of the above-mentioned liquid metering device or metering delivery system, and will not be described here.

In the description of this application, the term "plurality" refers to two or more than two, unless clearly defined otherwise, the orientation or positional relationship indicated by the terms "upper" and "lower" are based on the drawings shown The orientation or positional relationship is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the application; The terms "connected", "installed", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or through an intermediate connection. The medium is indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in this application In at least one embodiment or example. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.

The above are only preferred embodiments of the application, and are not used to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A liquid metering device, which includes: a first metering bucket, a second metering bucket, and a first weighing sensor that weighs the first metering bucket and the second metering bucket together; the second metering bucket The first metering hopper is connected to the first metering hopper through an overflow port provided at the upper or top of the first metering hopper. The bottom outlet of the first metering hopper is connected with a first discharge pipe, and the first discharge pipe is provided with a first switch A valve, a second discharge pipe is connected to the bottom outlet of the second metering hopper, and a second switch valve is arranged on the second discharge pipe.
The liquid metering device according to claim 1, wherein:

The second measuring bucket is fixedly arranged inside the first measuring bucket.
The liquid metering device according to claim 2, wherein:

The second measuring bucket and the first measuring bucket share at least one bucket wall.
The liquid metering device according to claim 2, wherein:

The second discharge pipe passes through the bottom wall of the first metering hopper and is connected to the bottom outlet of the second metering hopper, and the second on-off valve is arranged on the second discharge pipe in the first On the pipe section outside a measuring bucket.
The liquid metering device according to any one of claims 2 to 4, wherein:

The top of the second metering bucket is an open structure, the overflow port is the top opening of the second metering bucket, and the top of the second metering bucket is lower than the top of the first metering bucket.
A metered delivery system, which includes:

The first dosing device, the second dosing device and the liquid metering device according to any one of claims 1 to 5, wherein the outlet of the first dosing device is connected to the inlet of the first metering hopper, so The outlet of the second feeding device is communicated with the inlet of the second metering hopper.
The metered delivery system according to claim 6, wherein:

The first feeding device includes a third metering hopper and a second load cell for weighing the third metering hopper. The bottom outlet of the third metering hopper is connected with a third discharge pipe. The outlet of the discharge pipe is communicated with the inlet of the first metering hopper, and a third switch valve is provided on the third discharge pipe.
The metered delivery system according to claim 7, wherein:

The third metering hopper is located above the first metering hopper, and the third on-off valve is provided on a pipe section of the third discharge pipe outside the first metering hopper.
The metered delivery system according to any one of claims 6 to 8, wherein:

A discharging pipeline is arranged under the first metering hopper, and the outlet of the first discharging pipe and the outlet of the second discharging pipe are connected with the discharging pipeline.
A mixing plant, which includes:

The liquid metering device according to any one of claims 1 to 5; or

The metered delivery system according to any one of claims 6 to 9.