Liquid metering accuracy circulating device

Abstract

The utility model discloses a kind of liquid metering precision circulating devices, comprising: storage tank, conveying assembly and reflux component, the storage tank, the conveying assembly and the reflux component are sequentially connected to form loop;The reflux component includes: reflux pipeline and with by the reflux pipeline sequentially connected back pressure valve, ultrasonic flowmeter and first pneumatic ball valve, the back pressure valve is arranged in one end close to the storage tank, and the first pneumatic ball valve is arranged in one end close to the conveying assembly.The utility model solves the problem that when maintaining or cleaning metering pipeline, part of solution needs to be discharged, resulting in cavity in metering pipeline, affecting the accuracy of flow measurement.

Description

Technical Field

[0001] This utility model belongs to the field of liquid metering technology, and specifically relates to a liquid metering accuracy circulation device. Background Technology

[0002] Liquid metering technology involves the precise delivery and measurement of liquid materials such as solvents and chemicals. Liquid metering systems provide accurate quality data to ensure the accurate delivery of liquids and meet production requirements. Common liquid metering methods include volumetric flow rate, mass flow rate, or gravimetric measurement. Volumetric flow rate measurement uses screw pumps, turbine flow meters, orifice plate flow meters, while mass flow rate measurement uses density and flow rate mass flow meters. Existing liquid metering pipelines, discharge pumps, filters, and check valves are prone to blockages or leaks. During maintenance and cleaning, some solution needs to be drained from the metering pipeline, creating cavities that compromise metering accuracy and severely impact product quality. Therefore, accurate metering needs to be performed again after maintenance. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a liquid metering accuracy circulation device, which solves the problem that when maintaining or cleaning metering pipelines, it is necessary to drain part of the solution, which causes cavities to be generated in the metering pipelines and affects the accuracy of flow measurement.

[0004] The technical solution of this utility model is: a liquid metering accuracy circulation device provided by this utility model, comprising: a storage tank, a conveying component and a return component, wherein the storage tank, the conveying component and the return component are connected in sequence to form a loop;

[0005] The reflux assembly includes: a reflux pipe and a back pressure valve, an ultrasonic flow meter and a first pneumatic ball valve connected in sequence through the reflux pipe. The back pressure valve is located at one end near the storage tank and the first pneumatic ball valve is located at one end near the conveying assembly.

[0006] Furthermore, the storage tank is provided with a feed port and a return port. The feed port is provided with a second pneumatic ball valve, and the return port is provided with a first manual ball valve. The first manual ball valve is connected to the back pressure valve through a first hose.

[0007] Furthermore, the conveying assembly includes a conveying pipe and a screw pump and a pressure gauge connected through the conveying pipe, and a second manual ball valve is provided between the screw pump and the pressure gauge.

[0008] Furthermore, the liquid metering accuracy circulation device also includes a filter assembly connected in series with the conveying assembly. The filter assembly includes a first filter and a second filter. The first filter contains a filter screen, and the second filter contains a magnetic rod.

[0009] Furthermore, the upper end of the first filter is connected to the pressure gauge, and the lower end of the first filter is connected to the lower end of the second filter.

[0010] Furthermore, the conveying assembly and the return assembly are connected via a first tee pipe. A third manual ball valve is provided at the first port of the first tee pipe, which is connected to the first pneumatic ball valve of the return assembly. A fourth manual ball valve is provided at the second port of the first tee pipe, and the third port of the first tee pipe is connected to the upper end of the second filter of the conveying assembly.

[0011] Furthermore, the fourth manual ball valve is connected to the third pneumatic valve, and the other end of the third pneumatic valve is connected to the discharge port.

[0012] Furthermore, the storage tank and the conveying assembly are connected by a second three-way pipe. The first end of the second three-way pipe is connected to the second pneumatic ball valve through a second flexible hose. A fifth manual ball valve is provided on the second end of the second three-way pipe. The other end of the fifth manual ball valve is connected to the conveying pipe, and a sixth manual ball valve is provided on the third end.

[0013] Furthermore, the conveying assembly also includes a fourth pneumatic ball valve, which is disposed between the fifth manual ball valve and the screw pump.

[0014] Furthermore, the liquid metering accuracy circulation device also includes a controller, which is electrically connected to the first pneumatic ball valve and the third pneumatic ball valve respectively.

[0015] The beneficial effects of this invention are as follows: This invention provides a liquid metering accuracy circulation device. The ultrasonic flow meter in the reflux assembly monitors the liquid flow rate in the reflux pipe in real time. The back pressure valve in the reflux pipe maintains a stable pressure within the system, preventing flow instability or equipment damage caused by pressure fluctuations during transportation. The reflux assembly allows the liquid to re-enter the storage tank through the reflux pipe after the transportation process is completed, forming a closed loop. Through the reflux operation, not only can liquid loss in the system be reduced, but the liquid inside the system can also be kept in a certain flow state, avoiding the formation of air bubbles and further improving metering accuracy. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a liquid metering accuracy circulation device provided in an embodiment of this application.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1-Return assembly, 2-Conveying assembly, 3-Storage tank, 4-Filter;

[0020] 11-Back pressure valve, 12-Ultrasonic flow meter, 13-First pneumatic ball valve, 14-Third manual ball valve, 15-First hose, 21-Screw pump, 22-Pressure gauge, 23-Second manual ball valve, 24-First tee pipe, 25-Fourth manual ball valve, 26-Third pneumatic ball valve, 27-Fourth pneumatic ball valve, 28-Fifth manual ball valve, 29-Second tee pipe, 210-Sixth manual ball valve, 211-Second hose. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In this invention, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0023] The implementation of this utility model will be described in detail below with reference to the specific accompanying drawings:

[0024] Figure 1 This is a schematic diagram of a liquid metering accuracy circulation device provided in an embodiment of this application, as shown below. Figure 1 As shown, the liquid metering accuracy circulation device includes a reflux assembly 1, a conveying assembly 2, a storage tank 3, and a filter 4. The storage tank 3, conveying assembly 2, and reflux assembly 1 are connected in sequence to form a loop. One end of the connection between conveying assembly 2 and reflux assembly 1 has a discharge port, through which the liquid raw material is output. The reflux assembly 1 allows the liquid to re-enter the storage tank 3 through a reflux pipe after the conveying process, forming a closed loop. Through reflux, not only can liquid loss in the system be reduced, but the liquid inside the system can also be kept in a certain flow state, avoiding sedimentation or the formation of bubbles, further improving metering accuracy.

[0025] The storage tank 3 is equipped with a feed inlet and a return outlet. The feed inlet is equipped with a second pneumatic ball valve 32, and the return outlet is equipped with a first manual ball valve 31. Compared with the manual ball valve, the pneumatic ball valve uses compressed air for rapid opening and closing, which facilitates timely control of closing the feed inlet. The second pneumatic ball valve 32 is connected to the conveying assembly 2 through a second flexible hose 211, and the first manual ball valve 31 is connected to the return assembly 1 through a first flexible hose 15. The use of flexible hoses ensures that the accuracy of the weighing scale is not affected by external forces.

[0026] The reflux assembly 2 includes a back pressure valve 11, an ultrasonic flow meter 12, a first pneumatic ball valve 13, and a third manual ball valve 14, connected sequentially by pipes. The other end of the third manual ball valve 14 is connected to the conveying assembly 2 via a first three-pipe 24. The back pressure valve is set to the required pressure value by an adjustable spring or pneumatic mechanism. When the pressure in the system reaches the set value, the back pressure valve partially opens to discharge excess fluid into the storage tank 3 to prevent the system pressure from becoming too high. When the pressure is lower than the set value, the valve remains closed to ensure that the pressure in the reflux pipeline does not drop.

[0027] The conveying assembly 2 includes a fifth manual ball valve 28, a fourth pneumatic ball valve 27, a screw pump 21, a second manual ball valve 23, and a pressure gauge 22, which are connected in sequence via pipes. One end of the fifth manual ball valve 28 is connected to a second flexible hose 211 via a second three-way pipe 29. A sixth manual ball valve 210 is provided at the other end of the second three-way pipe 29. The sixth manual ball valve 210 is used to clean the storage tank 3 and discharge waste material. When the liquid metering accuracy circulation device is in operation, the sixth manual ball valve 210 is closed. The screw pump 21 is used to control the liquid discharge rate. The filter 4 includes a first filter 41 and a second filter 42. The first filter 41 is a filter screen that filters particulate matter in the liquid. The second filter 42 is equipped with a magnetic rod that attracts iron-containing impurities in the fluid by generating a strong magnetic field and fixes them to the surface of the rod, thus purifying the fluid. The bottom of the first filter 41 is connected to the bottom of the second filter 42. The other end of the pressure gauge 22 is connected to the upper part of the first filter 41. The upper part of the second filter 42 is connected to the first three-way pipe 24. The second end of the first three-way pipe 24 is connected to the third manual ball valve 14 of the return assembly 1. The third end of the first three-way pipe 24 is connected to the outlet for outputting the liquid raw material of the conveying assembly 2. The third end of the first three-way pipe 24 is also equipped with a fourth manual ball valve 25 and a third pneumatic ball valve 26. The liquid metering accuracy circulation device also includes a controller (not shown in the figure). The controller is electrically connected to the first pneumatic ball valve 13 and the third pneumatic ball valve 26 respectively. When the pressure gauge detects that the liquid pressure in the delivery pipeline is low, the controller closes the third pneumatic ball valve 26, opens the first pneumatic ball valve 13, opens the return pipeline, and discharges the gas into the storage tank 3 through the return pipeline.

[0028] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0029] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A liquid metering accuracy circulating device, characterized by, include: A storage tank, a conveying assembly, and a return assembly are connected in sequence to form a loop; The reflux assembly includes: a reflux pipe and a back pressure valve, an ultrasonic flow meter and a first pneumatic ball valve connected in sequence through the reflux pipe. The back pressure valve is located at one end near the storage tank and the first pneumatic ball valve is located at one end near the conveying assembly.

2. A liquid metering accuracy cycling device as claimed in claim 1, characterized in that The storage tank is provided with a feed port and a return port. The feed port is provided with a second pneumatic ball valve, and the return port is provided with a first manual ball valve. The first manual ball valve is connected to the back pressure valve through a first hose.

3. A liquid metering accuracy cycling device as claimed in claim 2, characterized in that The conveying assembly includes a conveying pipe and a screw pump and a pressure gauge connected through the conveying pipe. A second manual ball valve is also provided between the screw pump and the pressure gauge.

4. A liquid metering accuracy cycling device as claimed in claim 3, characterized in that The liquid metering accuracy circulation device also includes a filtration assembly connected in series with the conveying assembly. The filtration assembly includes a first filter and a second filter. The first filter contains a filter screen, and the second filter contains a magnetic rod.

5. A liquid metering accuracy cycling device as claimed in claim 4, characterized in that The upper end of the first filter is connected to the pressure gauge, and the lower end of the first filter is connected to the lower end of the second filter.

6. A liquid metering accuracy cycling device as claimed in claim 4, characterized in that The conveying assembly and the return assembly are connected by a first tee pipe. A third manual ball valve is provided at the first port of the first tee pipe, which is connected to the first pneumatic ball valve of the return assembly. A fourth manual ball valve is provided at the second port of the first tee pipe, and the third port of the first tee pipe is connected to the upper end of the second filter of the conveying assembly.

7. A liquid metering accuracy cycling device as claimed in claim 6, characterized in that The fourth manual ball valve is connected to the third pneumatic ball valve, and the other end of the third pneumatic ball valve is connected to the discharge port.

8. A liquid metering accuracy cycling device as claimed in claim 7, characterized in that The storage tank and the conveying assembly are connected by a second three-way pipe. The first end of the second three-way pipe is connected to the second pneumatic ball valve through a second hose. A fifth manual ball valve is provided on the second end of the second three-way pipe. The other end of the fifth manual ball valve is connected to the conveying pipe. A sixth manual ball valve is provided on the third end.

9. A liquid metering accuracy cycling device as claimed in claim 8, characterized in that The conveying assembly also includes a fourth pneumatic ball valve, which is located between the fifth manual ball valve and the screw pump.

10. A liquid metering accuracy cycling device as claimed in claim 8, characterized in that The liquid metering accuracy circulation device also includes a controller, which is electrically connected to the first pneumatic ball valve and the third pneumatic ball valve respectively.

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