Liquid automatic metering tank

Abstract

The present application belongs to the field of automatic metering tank, and particularly relates to a kind of liquid automatic metering tank, including tank body, the upper end of the tank body is provided with tank cover, the inside of the tank cover is slidably connected with sealing light rod, the lower end of the sealing light rod is fixedly installed with adjusting float.The present application adopts "mechanical structure + electronic switch" double control mode, through the cooperative work of float ball switch and overflow port, the same volume change is converted into amplified liquid level change by using float, so as to realize accurate liquid level control and fault protection, taking carbon disulfide as an example, normal measurement error is not more than 50g, even when float ball switch fails, it can still ensure that the error is within 500g, and ensure the stability of continuous production.At the same time, adjustable float and calibration mechanism are provided on the structure, which can compensate the volume change of liquid according to seasonal temperature difference, effectively eliminate the measurement deviation caused by temperature, and replace the volume deviation required for different liquid varieties.

Description

Technical Field

[0001] This invention relates to the field of automatic metering tank technology, specifically to an automatic liquid metering tank. Background Technology

[0002] In industries such as chemical, pharmaceutical, and food processing, accurate metering of liquid raw materials is crucial for ensuring product quality, controlling production costs, and guaranteeing production safety. Currently, common liquid metering equipment mainly relies on manual observation of level gauges, electronic flow meters, or simple control devices based on float switches. In the existing technology, the method of manually observing the liquid level and manually controlling the feeding has obvious operational errors. Its accuracy is greatly affected by the operator's line of sight, sense of responsibility and experience, making it difficult to achieve accurate measurement. This is especially prone to batch quality problems in continuous production with strict requirements for proportioning. Another commonly used metering device is the electronic flow meter. Although it can achieve automatic metering under certain conditions, it has the following obvious drawbacks: First, electronic flow meters are expensive, complex to maintain, and have strict requirements for the cleanliness of the medium; second, its sensors, circuits and other electronic components are prone to failure in humid, corrosive or flammable and explosive environments. Once they fail, the metering will be out of control, which may result in the scrapping of the entire batch of materials or even cause production safety accidents such as leakage and mixing, causing serious economic losses or even personal injury. Furthermore, existing float-type liquid level control devices, while relatively simple in structure, generally suffer from problems such as a small liquid level measurement range, low control accuracy, inability to adapt to volume changes caused by liquid temperature differences, significant residue in the tank after discharge, and lack of backup mechanisms in case of float jamming or switch malfunction. Therefore, improvements to existing technologies are necessary. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic liquid metering tank that solves the problems of high cost of electronic flow meters and insufficient accuracy of mechanical flow meters.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatic liquid metering tank, comprising a tank body, a tank cover at the upper end of the tank body, a sealing rod slidably connected inside the tank cover, an adjusting float fixedly installed at the lower end of the sealing rod, a pointer fixedly installed on the outer side of the sealing rod, a scale fixedly installed at the upper end of the tank cover, an adjusting bracket fixedly installed at the upper end of the tank cover, an adjusting nut installed inside the adjusting bracket via a shaft retaining spring, an adjusting screw fixedly installed at the upper end of the sealing rod, an overflow port fixedly installed on the outer side of the tank body, a float switch box fixedly installed on the outer side of the tank body, a switch float inside the float switch box, a switch lead wire on the switch float, and a cover at the upper end of the float switch box.

[0005] Preferably, a sealing filler is provided between the sealing rod and the can lid, a sealing gasket is provided between the can body and the can lid, the adjusting float is located inside the can body, and the sealing filler can seal the connection between the sealing rod and the can lid.

[0006] Preferably, the pointer is slidably disposed inside the scale, the adjusting nut is threadedly connected to the adjusting screw, and two symmetrically distributed adjusting handles are fixedly installed on the outside of the adjusting nut, which can drive the adjusting nut to rotate.

[0007] Preferably, two vertically distributed liquid level gauges are fixedly installed on the outer side of the tank, and a feed inlet is fixedly installed on the outer side of the tank, which can feed material into the tank.

[0008] Preferably, a discharge port is fixedly installed at the lower end of the tank, and a spare port is fixedly installed on the outside of the discharge port, so that raw materials can be discharged through the discharge port when changing materials.

[0009] Preferably, a clamping nut is provided at the upper end of the cover, and the switch float is installed on the inside of the cover through the clamping nut, which can adjust the switch float.

[0010] Preferably, two fixing lugs are fixedly installed on the outer side of the tank body, and the fixing lugs can install the tank body.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention employs a dual-control mode of "mechanical structure + electronic switch." Through the coordinated operation of the float switch and overflow port, the float converts the same volume change into an amplified change in liquid level, thereby achieving precise liquid level control and fault protection. Taking carbon disulfide as an example, the normal measurement error does not exceed 50g, and even when the float switch fails, the error remains within 500g, ensuring the stability of continuous production. Simultaneously, the structure includes an adjustable float and calibration mechanism, which can compensate for liquid volume changes according to seasonal temperature differences, effectively eliminating measurement deviations caused by temperature.

[0012] 2. This invention also has the advantages of simple structure, safety and reliability, and convenient operation and maintenance. The overall structure is mainly mechanical, which reduces the dependence on high-cost electronic components and is suitable for harsh industrial environments such as corrosive and flammable environments; the overflow port and residue-free design effectively prevent overload and media residue, improve safety and facilitate cleaning and switching; the visual scale and detachable switch float further simplify the daily operation and maintenance process, and have good practicality and economy. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 The left view; Figure 3 For the present invention Figure 1 Top view.

[0014] In the diagram: 1. Tank body; 2. Tank cover; 3. Sealing rod; 4. Adjusting float; 5. Pointer; 6. Scale; 7. Adjusting bracket; 8. Adjusting nut; 9. Adjusting screw; 10. Adjusting handle; 11. Inlet; 12. Overflow port; 13. Level gauge port; 14. Discharge port; 15. Spare port; 16. Float switch box; 17. Switch float; 18. Switch lead wire; 19. Box cover; 20. Hoop nut; 21. Fixing lug. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-3 An automatic liquid metering tank includes a tank body 1, a tank cover 2 at the upper end of the tank body 1, a sealing rod 3 slidably connected inside the tank cover 2, an adjusting float 4 fixedly installed at the lower end of the sealing rod 3, a pointer 5 fixedly installed on the outer side of the sealing rod 3, a scale 6 fixedly installed at the upper end of the tank cover 2, an adjusting bracket 7 fixedly installed at the upper end of the tank cover 2, an adjusting nut 8 installed inside the adjusting bracket 7 via a shaft and a retaining spring, an adjusting screw 9 fixedly installed at the upper end of the sealing rod 3, an overflow port 12 fixedly installed on the outer side of the tank body 1, a float switch box 16 fixedly installed on the outer side of the tank body 1, a switch float 17 installed inside the float switch box 16, a switch lead wire 18 installed on the switch float 17, and a box cover 19 at the upper end of the float switch box 16.

[0017] Please see Figure 1-3A sealing filler is provided between the sealing rod 3 and the tank cover 2, and a sealing gasket is provided between the tank body 1 and the tank cover 2. The adjusting float 4 is located inside the tank body 1. The sealing filler can seal the connection between the sealing rod 3 and the tank cover 2. The pointer 5 is slidably set inside the scale 6. The adjusting nut 8 and the adjusting screw 9 are connected by threads. Two symmetrically distributed adjusting handles 10 are fixedly installed on the outside of the adjusting nut 8. The adjusting nut 8 can be rotated by adjusting the adjusting handles 10. Two vertically distributed liquid level gauge ports 13 are fixedly installed on the outside of the tank body 1. A feed port 11 is fixedly installed on the outside of the tank body 1. The feed port 11 can feed material into the inside of the tank body 1.

[0018] Please see Figure 1-3 A discharge port 14 is fixedly installed at the lower end of the tank body 1. A spare port 15 is fixedly installed on the outside of the discharge port 14. The raw material can be discharged through the discharge port 14 when changing materials. A clamping nut 20 is provided at the upper end of the box cover 19. The switch float 17 is installed on the inside of the box cover 19 through the clamping nut 20. The clamping nut 20 can adjust the switch float 17. Two fixing lugs 21 are fixedly installed on the outside of the tank body 1. The fixing lugs 21 can install the tank body 1.

[0019] The specific implementation process of this invention is as follows: I. Measurement Setting Stage: Rotating the adjusting handle 10 causes the adjusting nut 8 to rotate, which in turn drives the adjusting screw 9, which is threaded to it, to move up and down. The adjusting screw 9 drives the sealing rod 3 and the adjusting float 4 fixed at its lower end to rise and fall synchronously, thereby presetting the maximum liquid capacity of the tank. The pointer 5 fixed on the sealing rod 3 moves with it, indicating the current set liquid level on the scale 6, achieving intuitive and adjustable volume calibration.

[0020] II. Feeding Control Stage: Liquid enters tank 1 through inlet 11, and the liquid level gradually rises. When the liquid level reaches the preset height, the switch float 17 in the float switch box 16 connected to tank 1 floats up with the liquid level and triggers the action. The signal is transmitted to the control system through switch lead 18, which controls the feed pump to stop working, completing one precise material preparation. The operator can perform dual observation and verification through the auxiliary liquid level gauge installed in the liquid level gauge port 13. III. Fault Protection Phase: If the control element in the float switch box 16 malfunctions and the liquid level continues to rise beyond the preset value, it will reach the height of the overflow port 12. The excess liquid will automatically overflow through the overflow port 12 and return to the raw material tank, thereby ensuring that the amount of liquid in the tank 1 is always mechanically limited within the preset error allowable range (taking carbon disulfide as an example, the error does not exceed 500g), achieving reliable fault protection and avoiding overload risk. IV. Material Discharge and Cleaning Stage By opening the discharge port 14, the liquid inside the tank can be completely discharged. Any residual liquid in the float switch box 16, due to its slightly inclined bottom design, will flow back into the tank 1 through the square holes in the side wall, achieving residue-free discharge and ensuring accurate metering. When it is necessary to change the medium, a cleaning pipeline or a switching pipeline can be connected through the spare port 15, facilitating equipment cleaning and flexible use of different liquid types. V. Seasonal Calibration and Maintenance In areas with large temperature differences, the reference position of the adjusting float 4 can be recalibrated periodically by adjusting the adjusting nut 8 and adjusting screw 9 to compensate for the volume change of the liquid caused by thermal expansion and contraction, thereby ensuring the long-term accuracy of measurement. The switch float 17 can be maintained by opening the box cover 19, which is convenient and does not affect the main structure.

[0021] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic liquid metering tank, comprising a tank body (1), characterized in that: The upper end of the tank body (1) is provided with a tank cover (2), and a sealing rod (3) is slidably connected inside the tank cover (2). An adjusting float (4) is fixedly installed at the lower end of the sealing rod (3). A pointer (5) is fixedly installed on the outer side of the sealing rod (3). A scale (6) is fixedly installed at the upper end of the tank cover (2). An adjusting bracket (7) is fixedly installed at the upper end of the tank cover (2). An adjusting nut (8) is installed inside the adjusting bracket (7) via a shaft retainer. An adjusting screw (9) is fixedly installed at the upper end of the sealing rod (3). An overflow port (12) is fixedly installed on the outer side of the tank body (1). A float switch box (16) is fixedly provided on the outer side of the tank body (1). A switch float (17) is provided inside the float switch box (16). A switch lead (18) is provided on the switch float (17). A box cover (19) is provided at the upper end of the float switch box (16).

2. The automatic liquid metering tank according to claim 1, characterized in that: A sealing filler is provided between the sealing rod (3) and the can cover (2), a sealing gasket is provided between the can body (1) and the can cover (2), and the adjusting float (4) is located inside the can body (1).

3. The automatic liquid metering tank according to claim 1, characterized in that: The pointer (5) is slidably disposed inside the scale (6), the adjusting nut (8) is connected to the adjusting screw (9) by a thread, and two symmetrically distributed adjusting handles (10) are fixedly installed on the outside of the adjusting nut (8).

4. The automatic liquid metering tank according to claim 1, characterized in that: Two vertically distributed liquid level gauge ports (13) are fixedly installed on the outside of the tank (1), and a feed inlet (11) is fixedly installed on the outside of the tank (1).

5. The automatic liquid metering tank according to claim 1, characterized in that: A discharge port (14) is fixedly installed at the lower end of the tank (1), and a spare port (15) is fixedly installed on the outside of the discharge port (14).

6. The automatic liquid metering tank according to claim 1, characterized in that: The upper end of the cover (19) is provided with a clamping nut (20), and the switch float (17) is installed on the inside of the cover (19) through the clamping nut (20).

7. The automatic liquid metering tank according to claim 1, characterized in that: Two fixing lugs (21) are fixedly installed on the outside of the tank (1).

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