Liquid metering device and liquid metering system for mixing plant

Abstract

The utility model provides a liquid metering device and a liquid metering system for a mixing plant, and belongs to the technical field of engineering machinery. The mixing plant liquid metering device comprises a first liquid precise weighing hopper, a first liquid feeding pipe and an inverted-U-shaped first liquid overflow pipe are arranged at the top of the first liquid precise weighing hopper, a first liquid outlet pipe is connected to a bottom outlet of the first liquid precise weighing hopper, and a first liquid metering hopper with a metering function is arranged below the first liquid precise weighing hopper. Liquid in the first liquid fine weighing hopper can flow into the first liquid metering hopper through the first liquid outlet pipe and the first liquid overflow pipe, and the lowest point of the bent part of the first liquid overflow pipe is higher than the highest point of the first liquid feeding pipe. And the lowest point of the bent part of the first liquid overflow pipe is higher than the highest point of the first liquid feeding pipe, so that the function of accurate metering is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a liquid metering device and a liquid metering system for a mixing station. Background Art

[0002] The quality of a project is a long-term plan. The quality of a project depends on the quality of the project construction and the quality of the concrete. The metering and mixing of the concrete mixing station is the premise for ensuring the quality of concrete and an important guarantee for the quality of the project. Therefore, accurate metering of the concrete mixing station is the premise for ensuring the quality of concrete. In a concrete mixing station, liquid metering includes the metering of water and the metering of various liquid concrete admixtures. The precise metering and correct use of various additives in water and concrete have a complex and multifaceted impact on the various performance properties of concrete. Appropriate and precise metering of water and admixtures is very important for the normal coagulation and hardening of concrete.

[0003] However, the liquid metering device of the mixing station in the prior art often has the problem of metering out of tolerance on the construction site. Summary of the invention

[0004] The utility model provides a liquid metering device and a liquid metering system for a mixing station, which are used to solve the defect that metering devices in the prior art are prone to metering over-tolerance during metering, and realize the function of accurate metering.

[0005] The utility model provides a liquid metering device for a mixing station, comprising a first liquid precision weighing bucket, a first liquid feeding pipe and a first liquid overflow pipe are arranged on the top of the first liquid precision weighing bucket, a first liquid outlet pipe is connected to the bottom outlet of the first liquid precision weighing bucket, and a first liquid metering bucket with a metering function is arranged below the first liquid precision weighing bucket;

[0006] The first liquid overflow pipe adopts an inverted U-shaped pipe, and the liquid in the first liquid precision weighing bucket can flow into the first liquid measuring bucket through the first liquid outlet pipe and the first liquid overflow pipe;

[0007] The lowest point of the curved portion of the first liquid overflow pipe is higher than the highest point of the first liquid feeding pipe.

[0008] Optionally, a first valve for opening and closing the first liquid outlet pipe is provided on the first liquid outlet pipe, and the first valve is a first electromagnetic one-way valve.

[0009] Optionally, a first metering sensor is provided on the first liquid metering hopper, a first discharge pipe is connected to the bottom of the first liquid metering hopper, a first butterfly valve is installed on the first discharge pipe, and the first butterfly valve is an electric butterfly valve.

[0010] Optionally, a first manual ball valve is further installed on the first liquid outlet pipe above the first electromagnetic one-way valve to adjust the flow rate of the liquid in the first liquid outlet pipe.

[0011] The utility model provides a liquid metering system, comprising a mixing station liquid metering device and at least one group of second liquid metering devices, wherein the mixing station liquid metering device is used to measure a first liquid; the second liquid metering device is used to measure a second liquid; the second liquid metering device is arranged above the first liquid metering hopper, and the first liquid measured by the mixing station liquid metering device and the second liquid measured by the second liquid metering device are mixed in the first liquid metering hopper and then discharged.

[0012] Optionally, the second liquid metering device includes a second liquid precision weighing bucket, a second liquid feeding pipe and a second liquid overflow pipe are arranged on the top of the second liquid precision weighing bucket, a second liquid outlet pipe is connected to the bottom outlet of the second liquid precision weighing bucket, and a second liquid metering bucket with a metering function is arranged below the second liquid precision weighing bucket;

[0013] The second liquid overflow pipe adopts an inverted U-shaped pipe, and the liquid in the second liquid precision weighing bucket can flow into the second liquid measuring bucket through the second liquid outlet pipe and the second liquid overflow pipe;

[0014] The lowest point of the curved portion of the second liquid overflow pipe is higher than the highest point of the second liquid feeding pipe.

[0015] Optionally, a second valve for opening and closing the second liquid outlet pipe is provided on the second liquid outlet pipe, and the second valve is a second electromagnetic one-way valve.

[0016] Optionally, a second metering sensor is provided on the second liquid metering bucket.

[0017] Optionally, a second manual ball valve is installed on the second liquid outlet pipe above the second electromagnetic one-way valve to adjust the flow rate of the liquid in the second liquid outlet pipe.

[0018] Optionally, the bottom outlet of the second liquid metering hopper is connected to a second discharge pipe, a second butterfly valve is installed on the second discharge pipe, and the second butterfly valve is an electric butterfly valve.

[0019] The utility model provides a liquid metering device for a mixing station, comprising a first liquid precision weighing bucket, a first liquid feeding pipe and an inverted U-shaped first liquid overflow pipe are arranged on the top of the first liquid precision weighing bucket, the lowest point of the bending part of the first liquid overflow pipe is higher than the highest point of the first liquid feeding pipe; by setting the lowest point of the bending part of the first liquid overflow pipe higher than the highest point of the first liquid feeding pipe, when the first liquid feeding pump stops working, even if there is still liquid in the first liquid feeding pipe flowing into the first liquid precision weighing bucket, due to the relationship between the liquid level, the liquid in the first liquid precision weighing bucket will not flow into the first liquid metering bucket through the first liquid overflow pipe, thereby ensuring the rough weighing accuracy, and then through fine weighing, the liquid metering accuracy is guaranteed to be within the range of ±1%, thereby realizing the precise metering function. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 1 It is a schematic diagram of the overall structure of the liquid metering device for a mixing station provided by the utility model;

[0022] Figure 2 It is a schematic diagram of the main structure of the first liquid precision weighing bucket of the liquid metering device of the mixing station provided by the utility model;

[0023] Figure 3 It is a side structural schematic diagram of the first liquid precision weighing bucket of the liquid metering device of the mixing station provided by the utility model;

[0024] Figure 4 It is a schematic diagram of the top view of the first liquid precision weighing bucket of the liquid metering device of the mixing station provided by the utility model;

[0025] Figure 5 It is a schematic diagram of the overall structure of the liquid metering system provided by the utility model.

[0026] Reference numerals:

[0027] 1: first liquid precision weighing bucket; 101: first liquid feeding pipe; 102: first liquid overflow pipe;

[0028] 2: first liquid outlet pipe; 201: first electromagnetic one-way valve; 202: first manual ball valve;

[0029] 3: first liquid measuring hopper; 301: first measuring sensor; 302: first discharge pipe; 303: first butterfly valve;

[0030] 4: second liquid precision weighing bucket; 401: second liquid feeding pipe; 402: second liquid overflow pipe;

[0031] 5: second liquid outlet pipe; 501: second electromagnetic one-way valve;

[0032] 6: second liquid measuring hopper; 601: second measuring sensor; 602: second discharge pipe; 603: second butterfly valve. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Combine the following Figure 1-Figure 5 The utility model describes a liquid metering device and a liquid metering system for a mixing station.

[0035] like Figure 1-4 As shown, the utility model is a liquid metering device for a mixing station, which is used to measure a first liquid. The first liquid takes water as an example, and includes a first liquid precision weighing bucket 1. A first liquid feeding pipe 101 and an inverted U-shaped first liquid overflow pipe 102 are arranged on the top of the first liquid precision weighing bucket 1. The end of the first liquid feeding pipe 101 away from the first liquid precision weighing bucket 1 is connected to a first liquid feeding pump, and the lowest point of the bending part of the first liquid overflow pipe 102 is higher than the highest point of the first liquid feeding pipe 101.

[0036] The bottom outlet of the first liquid precision weighing bucket 1 is connected to a first liquid outlet pipe 2 , and a first valve, specifically a first electromagnetic one-way valve 201 , is installed on the first liquid outlet pipe 2 .

[0037] like Figure 2 As shown, a first manual ball valve 202 is installed on the first liquid outlet pipe 2 above the first electromagnetic one-way valve 201 to facilitate adjusting the flow rate of the liquid in the first liquid outlet pipe 2 to ensure that the precision of the precise weighing meets the precision requirements.

[0038] like Figure 1 As shown, a first liquid measuring hopper 3 is arranged below the first liquid precision weighing hopper 1, and the top of the first liquid measuring hopper 3 is open, and the water in the first liquid precision weighing hopper 1 can flow into the first liquid measuring hopper 3 through the first liquid outlet pipe 2 and the first liquid overflow pipe 102. A first metering sensor 301 is installed on the first liquid measuring hopper 3 to weigh the water in the first liquid measuring hopper 3. Specifically, the first metering sensor 301 is a pressure sensor, and the number of the pressure sensors is specifically three.

[0039] The bottom outlet of the first liquid metering hopper 3 is connected with a first discharge pipe 302 , and a first butterfly valve 303 is installed on the first discharge pipe 302 . Specifically, the first butterfly valve 303 is an electric butterfly valve.

[0040] When the liquid metering device of the mixing station is working, after the mixing station control system gives a water supply instruction, the first liquid feeding pump is turned on, and the first liquid feeding pump extracts water from the water storage tank, and the water flows into the first liquid precision weighing bucket 1 through the first liquid feeding pipe 101. When the liquid level of the water in the first liquid precision weighing bucket 1 reaches the overflow port of the first liquid overflow pipe 102, the water in the first liquid precision weighing bucket 1 flows into the first liquid metering bucket 3 through the first liquid overflow pipe 102. The first metering sensor 301 weighs the water in the first liquid metering bucket 3, and the first metering sensor 301 uploads the weighing value, i.e., the overflow amount, to the mixing station control system. When the overflow amount reaches the rough weighing value set by the mixing station control system (which can be manually set and adjusted), the mixing station control system controls the first liquid feeding pump to stop working, and the rough weighing work is completed. Then, after the mixing station control system sends a precision weighing instruction to the liquid metering device of the mixing station, the mixing station control system controls the first electromagnetic one-way valve 201 to open, and the water in the first liquid precision weighing bucket 1 flows into the first liquid metering bucket 3 through the first liquid outlet pipe 2 for precision weighing. When the precise weighing value set by the mixing station control system is reached, the mixing station control system controls the first electromagnetic one-way valve 201 to close, and the precise weighing ends.

[0041] When the overflow reaches the rough value set by the control system of the mixing station, the first liquid feeding pump stops working. If the lowest point of the curved part of the first liquid overflow pipe 102 is lower than or equal to higher than the highest point of the first liquid feeding pipe 101, then when the first liquid feeding pump stops working, due to the liquid level, water higher than the liquid level of the first liquid overflow pipe 102 will still flow into the first liquid metering bucket 3, causing metering errors.

[0042] When the lowest point of the curved portion of the first liquid overflow pipe 102 is set higher than the highest point of the first liquid feeding pipe 101, when the first liquid feeding pump stops working, even if there is still water in the first liquid feeding pipe 101 flowing into the first liquid precision weighing bucket 1, due to the liquid level, the water in the first liquid precision weighing bucket 1 will not flow into the first liquid metering bucket 3 through the first liquid overflow pipe 102, thereby ensuring the rough weighing accuracy. After fine weighing, the liquid metering accuracy can be guaranteed to be within the range of ±1%.

[0043] like Figure 5 As shown, a liquid metering system of the utility model includes Figure 1The mixing station liquid metering device and at least one group of second liquid metering devices, the second liquid metering device is used to measure the second liquid, the second liquid is an additive for example, (the number of second liquid metering devices is determined according to the specific situation of the mixing station, and can be one or more groups). The second liquid metering device includes a second liquid precision weighing bucket 4, the top of the second liquid precision weighing bucket 4 is provided with a second liquid feeding pipe 401 and an inverted U-shaped second liquid overflow pipe 402, the end of the second liquid feeding pipe 401 away from the top of the second liquid precision weighing bucket 4 is connected to a second liquid feeding pump, and the lowest point of the curved part of the second liquid overflow pipe 402 is higher than the highest point of the second liquid feeding pipe 401.

[0044] The bottom outlet of the second liquid precision weighing bucket 4 is connected to a second liquid outlet pipe 5, on which a second valve is installed, specifically a second electromagnetic one-way valve 501. A second manual ball valve (not shown in the figure) is also installed on the second liquid outlet pipe 5 above the second electromagnetic one-way valve 501 to facilitate adjusting the flow rate of the liquid in the second liquid outlet pipe 5 to ensure that the precision of the precision weighing reaches the precision requirement.

[0045] A second liquid measuring hopper 6 is provided below the second liquid precision weighing hopper 4. The top of the second liquid measuring hopper 6 is open. The liquid in the second liquid precision weighing hopper 4 can flow into the second liquid measuring hopper 6 through the second liquid outlet pipe 5 and the second liquid overflow pipe 402. The second liquid measuring hopper 6 is provided with a second measuring sensor 601, generally 3 in number, for weighing the additive in the second liquid measuring hopper 6. Specifically, the second measuring sensor 601 is a pressure sensor.

[0046] The bottom outlet of the second liquid measuring hopper 6 is connected to a second discharge pipe 602, and a second butterfly valve 603 is installed on the second discharge pipe 602. Specifically, the second butterfly valve 603 is an electric butterfly valve.

[0047] The additive in the second liquid measuring hopper 6 can flow into the first liquid measuring hopper 3 through the second discharge pipe 602 and mix with the water in the first liquid measuring hopper 3. The additive and water flowing into the first liquid measuring hopper 3 are mixed and discharged from the first discharge pipe 302 together.

[0048] When the second liquid metering device is working, after the mixing station control system gives the admixture batching instruction, the second liquid feeding pump is turned on, and the second liquid feeding pump extracts the admixture from the admixture storage tank, and the admixture flows into the second liquid precision weighing bucket 4 through the second liquid feeding pipe 401. When the admixture liquid level in the second liquid precision weighing bucket 4 reaches the overflow port of the inverted U-shaped second liquid overflow pipe 402, the admixture in the second liquid precision weighing bucket 4 flows to the second liquid metering bucket 6 through the second liquid overflow pipe 402. The second metering sensor 601 weighs the admixture in the second liquid metering bucket 6, and the second metering sensor 601 uploads the weighing value, i.e., the overflow amount, to the mixing station control system. When the overflow amount reaches the rough weighing value set by the mixing station control system of the admixture metering device (which can be manually set and adjusted), the second liquid feeding pump stops working, and the rough weighing work is completed. Then, after the mixing station control system issues a precision weighing instruction to the second liquid metering device, the mixing station control system controls the second electromagnetic one-way valve 501 to open, and the additive in the second liquid precision weighing bucket 4 flows into the second liquid metering bucket 6 through the second liquid outlet pipe 5 for precision weighing. When the additive flowing into the second liquid metering bucket 6 reaches the additive precision weighing value set by the mixing station control system, the mixing station control system controls the second electromagnetic one-way valve 501 to close, and the precision weighing ends.

[0049] The entire liquid metering and batching process is completed, and the mixing station control system is waiting for a discharge signal. The second butterfly valve 603 is opened, and the additive in the second liquid metering hopper 6 flows into the first liquid metering hopper 3 and mixes with the water in the first metering hopper 3. Then, the first butterfly valve 303 is opened, and the water and the additive are discharged together.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid metering device for a mixing station, characterized in that: It comprises a first liquid precision weighing hopper (1), the top of which is provided with a first liquid feeding pipe (101) and a first liquid overflow pipe (102), the bottom outlet of the first liquid precision weighing hopper (1) is connected to a first liquid outlet pipe (2), and a first liquid measuring hopper (3) with a measuring function is provided below the first liquid precision weighing hopper (1); The first liquid overflow pipe (102) is an inverted U-shaped pipe, and the liquid in the first liquid precision weighing bucket (1) can flow into the first liquid measuring bucket (3) through the first liquid outlet pipe (2) and the first liquid overflow pipe (102); The lowest point of the curved portion of the first liquid overflow pipe (102) is higher than the highest point of the first liquid feeding pipe (101).

2. The liquid metering device for a mixing station according to claim 1, characterized in that: The first liquid outlet pipe (2) is provided with a first valve for opening and closing the pipeline of the first liquid outlet pipe (2), and the first valve is a first electromagnetic one-way valve (201).

3. The liquid metering device for a mixing station according to claim 1, characterized in that: The first liquid measuring hopper (3) is provided with a first measuring sensor (301), the bottom of the first liquid measuring hopper (3) is connected to a first discharge pipe (302), the first discharge pipe (302) is installed with a first butterfly valve (303), and the first butterfly valve (303) is an electric butterfly valve.

4. The liquid metering device for a mixing station according to claim 2, characterized in that: A first manual ball valve (202) is also installed on the first liquid outlet pipe (2) above the first electromagnetic one-way valve (201) and is used to adjust the flow rate of the liquid in the first liquid outlet pipe (2).

5. A liquid metering system, characterized in that: The invention comprises a mixing station liquid metering device as claimed in any one of claims 1 to 4 and at least one set of second liquid metering devices, wherein the mixing station liquid metering device is used to meter a first liquid; the second liquid metering device is used to meter a second liquid; the second liquid metering device is arranged above the first liquid metering hopper (3); the first liquid metered by the mixing station liquid metering device and the second liquid metered by the second liquid metering device are mixed in the first liquid metering hopper (3) and then discharged.

6. The liquid metering system according to claim 5, characterized in that: The second liquid metering device comprises a second liquid precision weighing hopper (4), a second liquid feeding pipe (401) and a second liquid overflow pipe (402) are arranged on the top of the second liquid precision weighing hopper (4), a second liquid outlet pipe (5) is connected to the bottom outlet of the second liquid precision weighing hopper (4), and a second liquid metering hopper (6) with a metering function is arranged below the second liquid precision weighing hopper (4); The second liquid overflow pipe (402) is an inverted U-shaped pipe, and the liquid in the second liquid precision weighing bucket (4) can flow into the second liquid measuring bucket (6) through the second liquid outlet pipe (5) and the second liquid overflow pipe (402); The lowest point of the curved portion of the second liquid overflow pipe (402) is higher than the highest point of the second liquid feeding pipe (401).

7. The liquid metering system according to claim 6, characterized in that: The second liquid outlet pipe (5) is provided with a second valve for opening and closing the pipeline of the second liquid outlet pipe (5), and the second valve is a second electromagnetic one-way valve (501).

8. The liquid metering system according to claim 6, characterized in that: The second liquid measuring hopper (6) is provided with a second measuring sensor (601).

9. The liquid metering system according to claim 7, characterized in that: A second manual ball valve is also installed on the second liquid outlet pipe (5) above the second electromagnetic one-way valve (501) and is used to adjust the flow rate of the liquid in the second liquid outlet pipe (5).

10. The liquid metering system according to claim 6, characterized in that: The bottom outlet of the second liquid metering hopper (6) is connected to a second discharge pipe (602), and a second butterfly valve (603) is installed on the second discharge pipe (602). The second butterfly valve (603) is an electric butterfly valve.

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