CN-117246969-B - Liquid metering device, method and liquid metering and filling system

Abstract

The embodiment of the application provides a liquid metering device, a liquid metering method and a liquid metering and filling system, wherein the metering device comprises a metering frame, a flow control device, a metering tank and a gravity sensor, wherein the flow control device is arranged on the metering frame and comprises a first flow valve and a second flow valve, the first flow valve is larger than the second flow valve in flow, the metering tank is arranged on the metering frame and is positioned below the flow control device, liquid outlets of the first flow valve and the second flow valve are respectively connected with a liquid inlet pipeline of the metering tank, and the gravity sensor is used for weighing liquid in the metering tank. The metering device provided by the application can not only improve the flow speed of liquid, but also achieve the metering precision required by the process by arranging the flow control device.

Inventors

• XIONG FAN
• XIONG YING
• CHEN XIAOJIAO

Assignees

• 重庆长江造型材料（集团）股份有限公司

Dates

Publication Date

20260508

Application Date

20230830

Claims (7)

1. 1. A metering method implemented based on a liquid metering device, the liquid metering device comprising: a metering rack; The flow control device is arranged on the metering frame and comprises a first flow valve and a second flow valve, the first flow valve is larger than the second flow valve in flow, and the distance N between the central lines of the liquid outlets of the first flow valve and the second flow valve is 150-200 mm; The metering tank is arranged on the metering frame and positioned below the flow control device through a gravity sensor, the liquid outlets of the first flow valve and the second flow valve are respectively connected with a liquid inlet pipeline of the metering tank, and the gravity sensor is used for weighing liquid in the metering tank; The outlet of the flowmeter is connected with a liquid inlet pipeline of the flow control device, the flowmeter is used for measuring the volume of liquid, and the method comprises the following steps: Opening the first and second flow valves, liquid passing through the flow meter, the first and second flow valves into the metering tank; when the gravity sensor detects that the metering tank reaches a first advance, closing a first flow valve; Closing a second flow valve when the gravity sensor detects that the metering tank reaches a second advance, and The method comprises the steps of determining the weight of liquid in a metering tank together based on a flow value of a flow meter and a weight value detected by a gravity sensor, obtaining the flow value from the flow meter, obtaining the weight value from the gravity sensor, obtaining the temperature of the liquid by using a temperature sensor, obtaining the corresponding liquid density based on the temperature of the liquid, calculating to obtain a theoretical weight value according to the flow value and the liquid density, and determining the weight of the liquid in the metering tank together according to the theoretical weight value and the weight value.
2. 2. The metering method of claim 1, wherein the feet on the metering frame are secured to the system platform with bolts and a buffer spring that is sleeved on the bolts and between the feet and the system platform for buffering the impact force when the liquid is introduced.
3. 3. The metering method of claim 1 wherein the metering tank comprises a tank body and a sealing cap, the sealing cap is in sealing connection with an opening of the tank body, the liquid inlet of the tank body comprises a first opening and a second opening which are arranged on the sealing cap, the first opening is connected with the first flow valve pipeline and is on the same axis, and the second opening is connected with the second flow valve pipeline and is on the same axis.
4. 4. The metering method of claim 1, wherein the liquid outlets of the first and second flow valves are respectively connected with the liquid inlet of the metering tank through a silicone hose.
5. 5. The metering method of claim 1 wherein the first and second flow valves comprise pneumatic ball valves, the first flow valve diameter gauge is DN25-DN50, and the second flow valve diameter gauge is DN10-DN15.
6. 6. A metering method as claimed in claim 3 wherein the sealing cap is provided with an air inlet for introducing a shielding gas into the interior of the canister to isolate the liquid in the canister from air.
7. 7. A metering method as claimed in claim 2 wherein the buffer spring has a wire diameter of 3-8mm, an outer diameter of 40-50mm and a pitch of 10-20mm.

Description

Liquid metering device, method and liquid metering and filling system Technical Field The application relates to the technical field of metering, in particular to a liquid metering device and a liquid metering and filling system. Background The liquid metering and filling system is a device for filling liquid into a target container or system, and has the main functions of controlling the flow rate, filling amount and filling speed of the liquid, so as to ensure that the filling process is accurately and efficiently completed. The liquid metering and filling system can be applied to the technical fields of chemical industry, pharmaceutical industry, scientific research and the like, and plays an important role in the production and experimental process. The metering accuracy in a liquid metering and filling system has an important influence on the quality of the production process. However, the weight of the liquid is measured during the liquid flow process, which increases the difficulty of high-precision measurement. Thus, there is a need for a liquid metering device with accurate metering. Disclosure of Invention Aiming at the technical problems in the prior art, the application provides a liquid metering device, which can not only improve the flow speed of liquid, but also reach the metering precision required by the process. The liquid metering device comprises a metering frame, a flow control device and a metering tank, wherein the flow control device is arranged on the metering frame and comprises a first flow valve and a second flow valve, the first flow valve is larger than the second flow valve in flow, the metering tank is arranged on the metering frame through a gravity sensor and is positioned below the flow control device, liquid outlets of the first flow valve and the second flow valve are respectively connected with a liquid inlet pipeline of the metering tank, and the gravity sensor is used for weighing liquid in the metering tank. According to the liquid metering device, the foundation on the metering frame is fixed on the system platform by the bolts and the buffer springs, and the buffer springs are sleeved on the bolts and positioned between the foundation and the system platform and used for buffering impact force when liquid is fed. The liquid metering device comprises a tank body and a sealing cover, wherein the sealing cover is in sealing connection with an opening of the tank body, a liquid inlet of the tank body comprises a first opening and a second opening which are arranged on the sealing cover, the first opening is connected with the first flow valve pipeline and is on the same axis, and the second opening is connected with the second flow valve pipeline and is on the same axis. According to the liquid metering device, the liquid outlets of the first flow valve and the second flow valve are respectively connected with the liquid inlet of the metering tank through the silica gel hose. The liquid metering device further comprises a flowmeter, an outlet of the flowmeter is connected with a liquid inlet pipeline of the flow control device, and the flowmeter is used for metering the volume of liquid. The liquid metering device as described above, wherein the first and second flow valves comprise pneumatic ball valves, the first flow valve having a diameter of a range of DN25-DN50, and the second flow valve having a diameter of a range of DN10-DN15. According to the liquid metering device, the sealing cover is provided with the air inlet for introducing protective gas into the tank body so as to isolate the liquid in the tank body from air. According to the liquid metering device, the wire diameter of the buffer spring is 3-8mm, the outer diameter of the buffer spring is 40-50mm, and the pitch of the buffer spring is 10-20mm. According to another aspect of the application, a method of metering a liquid is provided, comprising opening the first and second flow valves, liquid passing through the flow meter, the first and second flow valves into the metering tank, closing the first flow valve when the gravity sensor detects that the metering tank reaches a first advance, closing the second flow valve when the gravity sensor detects that the metering tank reaches a second advance, and determining the weight of the liquid in the metering tank based on the flow value of the flow meter and the weight value detected by the gravity sensor together. The liquid metering method comprises the steps of obtaining a flow value from a flowmeter, obtaining a weight value from a gravity sensor, obtaining the temperature of liquid by using a temperature sensor, obtaining the corresponding liquid density based on the temperature of the liquid, calculating to obtain a theoretical weight value according to the flow value and the liquid density, and determining the weight of the liquid in the metering tank according to the theoretical weight value and the weight value. According to another aspect of the ap