Liquid metering scale

Abstract

The utility model relates to the technical field of weighing and metering devices, and discloses a liquid metering scale which comprises a glass fiber reinforced plastic cylinder, an upper nylon plate is arranged on the upper surface of the glass fiber reinforced plastic cylinder, exhaust holes are formed in the upper nylon plate, and a sensing assembly used for improving precision is installed on the upper surface of the upper nylon plate. A lower nylon plate is arranged on the lower surface of the glass fiber reinforced plastic cylinder, a connecting assembly used for fixing is installed in the lower nylon plate, the sensing assembly comprises a connecting plate, and the lower surface of the connecting plate is arranged on the upper surface of an upper nylon plate. According to the utility model, the first bolt is in threaded connection with the connecting plate, the other end of the first bolt is in threaded connection with the frame through the second bolt, and the first bolt and the second bolt are attached to each other, so that measurement errors caused by loose connection and the like are reduced, and the measurement precision is improved; and the structural connection of the whole device is tighter and firmer.

Description

TECHNICAL FIELD

[0001] The utility model relates to weighing and metering device technical field especially relates to a liquid metering scale. BACKGROUND

[0002] In the production process of foundry sand, especially in the production process of coated sand, it is usually necessary to add a certain amount of liquid solution to meet the required process requirements, and accurate measurement of liquid mass or weight is extremely critical. In the chemical industry, accurate raw material ratio affects product quality, and traditional metering methods cannot meet the needs of modern chemical production. In the food and beverage industry, accurate measurement is required to ensure taste and quality. Large-scale production lines require efficient and automated metering equipment. In scientific research, chemical analysis experiments and biomedical research require accurate liquid measurement to ensure accurate and reliable experimental results.

[0003] However, the existing liquid weighing scale has many shortcomings. On the one hand, the weighing sensor of some weighing scales has limited precision, and in the case of weighing small amounts of liquid or requiring high-precision measurement, the error is large, which cannot meet the requirements of fine production and strict quality control. On the other hand, when placing the liquid container, due to the different shapes of the container and the uncertainty of the placement position, the center of gravity is unstable, which affects the accuracy of weighing. UTILITY MODEL CONTENT

[0004] To make up for the above shortcomings, the utility model provides a liquid metering scale, aiming to improve the problem of limited sensor precision, large error and unstable center of gravity of the scale body in the production process of coated sand in the prior art, which affects the accuracy of weighing.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a liquid metering scale, comprising a glass steel cylinder, an upper nylon plate is arranged on the upper surface of the glass steel cylinder, an exhaust hole is formed in the interior of the upper nylon plate, a sensing assembly for improving precision is mounted on the upper surface of the upper nylon plate, a lower nylon plate is arranged on the lower surface of the glass steel cylinder, and a connecting assembly for fixation is mounted in the interior of the lower nylon plate.

[0006] The sensing assembly comprises a connecting plate, the lower surface of the connecting plate is arranged on the upper surface of the upper nylon plate, a bolt one is threadedly connected in the interior of the connecting plate, a sensor is threadedly connected to one side of the outer wall of the bolt one, a bolt two is threadedly connected to one end of the sensor, a frame is threadedly connected to one side of the outer wall of the bolt two, the lower surface of the frame is attached to the upper surface of the sensor, and the upper surface of the connecting plate is attached to the lower surface of the sensor.

[0007] Further, the connecting assembly comprises a connecting bolt, one side of the outer wall of the connecting bolt is threadedly connected in the lower nylon plate, one side of the outer wall of the connecting bolt is threadedly connected in the upper nylon plate, and one side of the outer wall of the connecting bolt is threadedly connected in the connecting plate.

[0008] Further, the lower surface of the connecting plate is attached to the upper surface of the upper nylon plate, and the lower nylon plate is internally provided with a groove.

[0009] Further, one end of the glass steel cylinder is slidably connected to the inner wall of the groove, and the glass steel cylinder is used for more easily observing the internal condition.

[0010] Further, the upper nylon plate is internally provided with a feeding hole, and the feeding hole is fixedly connected with a feeding pipeline.

[0011] Further, one end of the feeding pipeline is fixedly connected with a connecting pipe one, and the connecting pipe one is used for guiding liquid to flow along a path.

[0012] Further, one side of the outer wall of the connecting pipe one is fixedly connected with a connecting pipe two, and one end of the connecting pipe two is fixedly connected with a pneumatic valve one.

[0013] Further, the lower nylon plate is fixedly connected with a discharging pipeline, one end of the discharging pipeline is fixedly connected to the connecting pipe two, and one end of the connecting pipe two is fixedly connected with a pneumatic valve two.

[0014] The utility model has the advantages of the following beneficial effects:

[0015] 1. In the utility model, the bolt one is threadedly connected with the connecting plate, the other end is threadedly connected with the frame through the bolt two, and they are attached to each other, the measurement error caused by loose connection is reduced, the measurement accuracy is improved, the connecting bolt in the connecting assembly is threadedly connected with the lower nylon plate, the upper nylon plate and the connecting plate at the same time, the structure connection of the whole device is more compact and firm, one end of the glass steel cylinder is slidably connected to the inner wall of the groove in the lower nylon plate, the overall stability of the device is further enhanced, the problems of limited sensor accuracy, large error and unstable center of gravity of the scale body in the production process of the coated sand in the prior art are solved, and the practicability of the device is improved.

[0016] 2. In the utility model, the glass steel cylinder is arranged to facilitate observation of the internal condition, the operator can intuitively understand the condition of the liquid in the metering process, the feeding pipeline is connected with the pneumatic valve one through the connecting pipe one and the connecting pipe two, the feeding process of the liquid can be accurately controlled, the discharging pipeline is connected with the connecting pipe two and the pneumatic valve two, the discharging operation after liquid metering is facilitated, and the practicability of the device is improved. DRAWINGS

[0017] Figure 1 A kind of liquid metering scale's three-dimensional structure schematic view is proposed for the utility model;

[0018] Figure 2 A kind of liquid metering scale's sensor part structure schematic view is proposed for the utility model;

[0019] Figure 3 A kind of liquid metering scale's feed pipe line part structure schematic view is proposed for the utility model.

[0020] Legend:

[0021] 1, connecting pipe one;2, pneumatic valve one;3, feed pipe line;4, upper nylon plate;5, connecting plate;6, exhaust hole;7, feed hole;8, lower nylon plate;9, glass steel cylinder;10, connecting bolt;11, discharge pipe line;12, pneumatic valve two;13, bolt one;14, bolt two;15, sensor;16, frame;17, connecting pipe two;18, recess. Specific implementation

[0022] The technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application, obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the present application.

[0023] Refer to Figure 1 and Figure 2The utility model provides a kind of liquid metering scale, its transparent characteristics facilitate operator to observe the liquid level, flowing state etc. of inside liquid, glass steel cylinder 9 upper surface is provided with upper nylon plate 4, it is installed on the upper surface of glass steel cylinder 9, it plays the role of plugging cylinder top opening, and it is formed with one relatively closed space with glass steel cylinder 9, upper nylon plate 4 is internally provided with exhaust hole 6, upper nylon plate 4 upper surface is installed with the sensing assembly for improving precision, glass steel cylinder 9 lower surface is provided with lower nylon plate 8, plugging glass steel cylinder 9 lower surface, cooperate with upper nylon plate 4, so that cylinder is completely closed, prevent liquid from bottom leakage, lower nylon plate 8 is internally installed with the connecting assembly for fixing, sensing assembly includes connecting plate 5, provides stable installation basis for sensor 15, its lower surface is closely attached with upper nylon plate 4, ensure the accuracy and stability of sensor 15 installation position, connecting plate 5 lower surface is arranged on the upper surface of upper nylon plate 4, screw bolt one 13 is screw-connected in connecting plate 5 inside, sensor 15 is screw-connected on the outer wall of screw bolt one 13 one side, as core detection element, can convert the gravity signal of liquid into electric signal, real-time monitoring the change of liquid weight in glass steel cylinder, screw bolt two 14 is screw-connected on the one end of sensor 15, screw bolt one 13 is used to reliably connect the lower end of sensor 15 with connecting plate 5, screw bolt two 14 realizes the stable hoisting of the upper end of sensor 15 and frame 16, frame 16 is screw-connected on the outer wall of screw bolt two 14 one side, frame 16 lower surface is attached with the upper surface of sensor 15, connecting plate 5 upper surface is attached with the lower surface of sensor 15, connecting assembly includes connecting bolt 10, connecting bolt 10 outer wall one side is screw-connected in lower nylon plate 8 inside, connecting bolt 10 outer wall one side is screw-connected in upper nylon plate 4 inside, connecting bolt 10 outer wall one side is screw-connected in connecting plate 5 inside.

[0024] Referring to Figure 1 , Figure 2 and Figure 3, the lower surface of the connecting plate 5 is attached to the upper surface of the upper nylon plate 4, the lower nylon plate 8 is provided with a groove 18 inside, one end of the glass steel cylinder 9 is slidingly connected to the inner wall of the groove 18, the groove 18 inside the lower nylon plate 8 is slidingly connected with one end of the glass steel cylinder 9, on the one hand, the stability of the glass steel cylinder in the device is enhanced, the installation is more firm, and deviation or shaking during operation is avoided, on the other hand, this connection method is convenient for assembly and disassembly of the device, and convenient for later maintenance and overhaul, in order to more easily observe the internal condition of the glass steel cylinder 9, the upper nylon plate 4 is provided with a feeding hole 7 inside, the feeding hole 7 is fixedly connected with a feeding pipe 3, one end of the feeding pipe 3 is fixedly connected with a connecting pipe one 1, the connecting pipe one 1 is used for guiding the liquid to flow along the path, the connecting pipe one 1 is fixedly connected with a connecting pipe two 17 on one side of the outer wall, one end of the connecting pipe two 17 is fixedly connected with a pneumatic valve one 2, the pneumatic valve one 2 can be accurately opened and closed according to the instruction of the control system, so as to realize accurate control of the feeding process, the lower nylon plate 8 is fixedly connected with a discharge pipe 11 inside, the discharge pipe 11 is fixedly connected with one end of the connecting pipe two 17 inside, which provides a channel for the discharge of the metered liquid, one end of the connecting pipe two 17 is fixedly connected with a pneumatic valve two 12, when the discharge is needed, the pneumatic valve two 12 is opened under the control of the control system, so that the liquid in the glass steel cylinder 9 is discharged to the external equipment or container in turn under the action of gravity through the discharge pipe 11 and the connecting pipe two 17, the weighing sensor and the PLC control cabinet Kunlun touch screen, ST60 PLC module, AE08 module, weighing transmitter, solenoid valve, solenoid relay constitute a weighing system, the weighing sensor converts the liquid gravity into an electric signal, which is transmitted to the data acquisition module for pretreatment and then sent to the PLC control module, the PLC performs operation and judgment according to the preset batching ratio and real-time weight data, cooperates with the solenoid relay and the solenoid valve through the I / O point, controls the feeding and discharging pneumatic valves, and realizes accurate control of liquid feeding and discharging.

[0025] Working principle: turn on the power, start the device, the operator inputs relevant parameters such as the preset proportioning ratio, target weight, etc. through the Kunlun touch screen, and the PLC control cabinet receives these parameters and stores them in the corresponding storage unit, preparing for subsequent control operation. When starting the feeding program, the PLC control module calculates the weight of the liquid to be fed according to the preset proportioning ratio and the current weight data of the liquid, and then sends an opening signal to the pneumatic valve 2, and the electromagnetic relay operates to open the pneumatic valve 2. At this time, the liquid enters the glass steel cylinder 9 from the external pipeline through the connecting pipe 1, the feeding pipeline 3 and the feeding hole 7. In the process of the liquid entering the glass steel cylinder 9, the weighing sensor 15 monitors the weight change of the liquid in the cylinder in real time. The upper end of the weighing sensor 15 is connected to the frame 16 by means of the bolt 2 14, and the lower end is fastened to the connecting plate 5 by means of the bolt 1 13. The lower surface of the connecting plate 5 is arranged on the upper surface of the upper nylon plate 4, and is fixedly connected with the upper nylon plate 4 and the glass steel cylinder 9 through the connecting bolt 10. The sensor 15 transmits the weight data to the data acquisition module, which transmits the collected data to the PLC control module after preliminary processing. The PLC control module continuously compares the real-time weight data with the preset feeding weight, and when the preset feeding weight is reached, the PLC control module sends a closing signal to the pneumatic valve 2, and the electromagnetic relay operates again to close the pneumatic valve 2, stopping the feeding. In the process of the liquid entering the glass steel cylinder 9, the air mixed in the liquid is discharged through the exhaust hole 6 of the upper nylon plate 4. The existence of the exhaust hole 6 ensures that there is no pressure change in the cylinder due to air accumulation, thereby ensuring that the weight data measured by the weighing sensor 15 accurately reflects the actual weight of the liquid. When unloading is needed, an opening signal is sent to the pneumatic valve 2, and the electromagnetic relay opens the pneumatic valve 2. At this time, the liquid in the glass steel cylinder 9 is discharged through the unloading pipeline 11 under the action of gravity. The unloading pipeline 11 is fixedly connected at one end of the connecting pipe 2 17, and the other end of the connecting pipe 2 17 is connected with the external unloading equipment. The liquid is discharged through the unloading pipeline 11 and the connecting pipe 2 17. Similarly, in the unloading process, the weighing sensor 15 continuously monitors the weight change of the remaining liquid in the cylinder and feeds back the data to the PLC control module. During the whole process, the operator can intuitively understand the working condition of the device, including whether the current liquid weight and the proportioning ratio meet the requirements, etc. At the same time, the historical data recorded by the data acquisition module is stored in the PLC control cabinet or other storage devices for subsequent inquiry and analysis.

[0026] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A liquid measuring scale, comprising a fiberglass cylinder (9), characterized in that: The upper surface of the fiberglass cylinder (9) is provided with an upper nylon plate (4), and an exhaust hole (6) is provided inside the upper nylon plate (4). A sensing component for improving accuracy is installed on the upper surface of the upper nylon plate (4). A lower nylon plate (8) is provided on the lower surface of the fiberglass cylinder (9), and a connecting component for fixing is installed inside the lower nylon plate (8). The sensing component includes a connecting plate (5), the lower surface of which is disposed on the upper surface of the upper nylon plate (4). A bolt (13) is threaded inside the connecting plate (5). A sensor (15) is threaded on one side of the outer wall of the bolt (13). A bolt (14) is threaded on one end of the sensor (15). A frame (16) is threaded on one side of the outer wall of the bolt (14). The lower surface of the frame (16) is in contact with the upper surface of the sensor (15). The upper surface of the connecting plate (5) is in contact with the lower surface of the sensor (15).

2. The liquid measuring scale according to claim 1, characterized in that: The connecting assembly includes a connecting bolt (10), one side of the outer wall of the connecting bolt (10) is threaded to the inside of the lower nylon plate (8), one side of the outer wall of the connecting bolt (10) is threaded to the inside of the upper nylon plate (4), and one side of the outer wall of the connecting bolt (10) is threaded to the inside of the connecting plate (5).

3. The liquid measuring scale according to claim 1, characterized in that: The lower surface of the connecting plate (5) is attached to the upper surface of the upper nylon plate (4), and the lower nylon plate (8) has a groove (18) inside.

4. A liquid measuring scale according to claim 3, characterized in that: One end of the fiberglass cylinder (9) is slidably connected to the inner wall of the groove (18), and the fiberglass cylinder (9) is designed to make it easier to observe the internal condition.

5. A liquid measuring scale according to claim 1, characterized in that: The upper nylon plate (4) has a feed hole (7) inside, and a feed pipe (3) is fixedly connected to the inner wall of the feed hole (7).

6. A liquid measuring scale according to claim 5, characterized in that: One end of the feed pipe (3) is fixedly connected to a connecting pipe (1), which is used to guide the liquid to flow along the path.

7. A liquid measuring scale according to claim 6, characterized in that: A connecting pipe 2 (17) is fixedly connected to one side of the outer wall of the connecting pipe 1 (1), and a pneumatic valve 1 (2) is fixedly connected to one end of the connecting pipe 2 (17).

8. A liquid measuring scale according to claim 1, characterized in that: The lower nylon plate (8) is internally connected to a discharge pipe (11), which is internally connected to one end of a connecting pipe (17), and a pneumatic valve (12) is fixedly connected to one end of the connecting pipe (17).

Images