Liquid level control device for material cylinder of filling machine

Abstract

The utility model relates to the technical field of liquid level detection, in particular to a liquid level control device for a material cylinder of a filling machine. The liquid level control device for the material cylinder of the filling machine comprises a material cylinder body, an adjusting valve is arranged at a feeding port of the material cylinder body, and a discharging port of the material cylinder body is communicated with the filling machine; the liquid level detection assembly comprises at least one capacitive liquid level meter, the detection end of the capacitive liquid level meter is arranged in the material cylinder body, the detection end of the capacitive liquid level meter is provided with a metal rod, and the metal rod and the side wall of the material cylinder body form two poles of the capacitive liquid level meter respectively; and the control system is respectively in signal connection with the capacitive liquid level meter and the feeding valve. The capacitance type liquid level meter is arranged in the material cylinder body, the detection precision is effectively improved, interference of material liquid can be avoided, meanwhile, the control system can control the opening degree of the adjusting valve according to liquid level information, the effect of accurately controlling the liquid level can be achieved, and the situation of material overflowing or material shortage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of liquid level detection technology, specifically to a liquid level control device for a filling machine's material cylinder. Background Technology

[0002] In the production of beverages such as fruit juices, nuts, and beans, filling is a crucial step. The filling machine's feed cylinder delivers the liquid to the machine, which then fills the beverage cans, completing the filling process. When detecting and controlling the liquid level in the filling machine's feed cylinder, three-stage electrode level gauges, hydrostatic sensors, or float level gauges are typically used. However, three-stage electrode level gauges can only measure the liquid level at three points, not continuously, resulting in insufficient accuracy and flexibility. Due to the relatively low height of the filling machine's feed cylinder, hydrostatic sensors exhibit relatively large deviations when measuring the liquid level. Furthermore, the liquid's viscosity and particle size can cause problems. When liquid adheres to the level gauge's rod or particles jam the float, it affects the float's movement, leading to inaccurate level measurements and potentially causing significant deviations in product filling volume or overflow from the filling machine's feed cylinder. Therefore, a device capable of accurately detecting the liquid level in the filling machine's feed cylinder is urgently needed. Utility Model Content

[0003] In view of this, the present invention provides a liquid level control device for the filling machine cylinder to solve the problem that existing liquid level detection devices cannot accurately detect the liquid level in the filling machine cylinder.

[0004] This utility model provides a liquid level control device for the filling machine's material cylinder, comprising:

[0005] The material cylinder body has an inlet equipped with a regulating valve and an outlet connected to the filling machine.

[0006] A liquid level detection assembly includes at least one capacitive liquid level gauge, the detection end of which is disposed in the material cylinder body. The detection end of the capacitive liquid level gauge has a metal rod, and the metal rod and the side wall of the material cylinder body respectively form the two poles of the capacitive liquid level gauge.

[0007] The control system is connected to the capacitive level gauge and the regulating valve via signals.

[0008] In one optional embodiment, the adjacent capacitive level gauges are spaced apart, and the included angle between the adjacent capacitive level gauges is 90°.

[0009] In one optional embodiment, the inlet of the material cylinder body is connected to the outlet of the storage tank through a material delivery pipe. The material delivery pipe is equipped with a feeding pump. The regulating valve is located at the end of the material delivery pipe near the inlet of the material cylinder body, and the regulating valve is located between the feeding pump and the inlet of the material cylinder body.

[0010] In one optional embodiment, a return pipe is further included, the inlet end of which is connected to the liquid conveying pipe, the connection point between the return pipe and the liquid conveying pipe is located between the regulating valve and the inlet of the material cylinder body, and a return valve is provided on the return pipe, the return valve being connected to the control system.

[0011] In one optional embodiment, the liquid delivery pipe is connected to a hot water pipe, and a hot water valve is provided on the hot water pipe, which is connected to the control system via a signal.

[0012] In one optional embodiment, the discharge port of the storage tank is provided with a discharge valve.

[0013] In one optional embodiment, a feed valve is provided between the discharge valve and the feed pump.

[0014] In one optional embodiment, one end of the liquid delivery pipe is connected to the CIP cleaning pipe, the other end of the CIP cleaning pipe is connected to the CIP cleaning device, a CIP cleaning valve is provided on the CIP cleaning pipe, and the CIP cleaning valve is signal-connected to the control system.

[0015] In one optional embodiment, the feed cylinder body has a first discharge pipe with a first discharge valve, the feed liquid conveying pipe is connected to a second discharge pipe with a second discharge valve, and the second discharge pipe is located between the feed pump and the regulating valve.

[0016] In one optional embodiment, an overflow hole is provided on the side wall of the material cylinder body, and the overflow hole is connected to an overflow pipe.

[0017] Beneficial effects:

[0018] 1. By installing a capacitive level gauge inside the material cylinder, the capacitive level gauge can determine the liquid level information through the two poles formed by the metal rod and the side wall of the material cylinder body, which effectively improves the detection accuracy, avoids interference from the liquid, and can be used in the material cylinder of filling machines with low height. At the same time, a regulating valve is installed at the feed inlet of the material cylinder body. The control system can control the opening of the regulating valve according to the liquid level information, which can achieve the effect of precise control of the liquid level and avoid the situation of overflowing or lack of material.

[0019] 2. Four capacitive level gauges are set at intervals, and the included angle between adjacent capacitive level gauges is 90°, which can realize multi-point detection of the liquid level in the material cylinder body. The control system sums the liquid level values ​​measured by the four capacitive level gauges and takes the average value as the liquid level value in the material cylinder body, which effectively improves the detection accuracy of the liquid level. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a filling machine material cylinder liquid level control device according to an embodiment of the present utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Material cylinder body; 2. Regulating valve; 3. Capacitive level gauge; 4. Material delivery pipe; 5. Storage tank; 6. Feed pump; 7. Return pipe; 8. Return valve; 9. Hot water pipe; 10. Hot water valve; 11. Discharge valve; 12. Feed valve; 13. CIP cleaning pipe; 14. CIP cleaning valve; 15. First discharge pipe; 16. First discharge valve; 17. Second discharge pipe; 18. Second discharge valve; 19. Overflow hole; 20. Overflow pipe; 21. Control system. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The following is combined Figure 1 The following describes embodiments of the present invention.

[0026] According to an embodiment of the present invention, a filling machine material cylinder liquid level control device is provided, comprising: a material cylinder body 1, a liquid level detection component and a control system 21.

[0027] Specifically, the feed inlet of the material cylinder body 1 is equipped with a regulating valve 2, and the discharge outlet of the material cylinder body 1 is connected to the filling machine. The liquid level detection component includes at least one capacitive liquid level gauge 3, the detection end of which is located inside the material cylinder body 1. The detection end of the capacitive liquid level gauge 3 has a metal rod, which, along with the side wall of the material cylinder body 1, forms the two poles of the capacitive liquid level gauge 3. The control system 21 is connected to the capacitive liquid level gauge 3 and the regulating valve 2 via signals.

[0028] In this embodiment, the detection end of the capacitive level gauge 3 is located inside the material cylinder body 1. The detection end of the capacitive level gauge 3 has a metal rod (not shown). The metal rod and the side wall of the material cylinder body 1 respectively form the two poles of the capacitive level gauge 3. The medium between the two poles is the material liquid and air. The dielectric constant of the material liquid is greater than that of air. When the liquid level rises, the capacitance increases, and conversely, when the liquid level falls, the capacitance decreases. Thus, the liquid level in the material cylinder body 1 can be determined. The capacitive level gauge 3 can transmit the real-time liquid level information to the control system 21. The control system 21 can control the regulating valve 2 according to the liquid level information. When the liquid level exceeds the set maximum liquid level value, the control system 21 controls the regulating valve 2 to adjust the opening degree, reducing the flow rate of the material liquid, thereby lowering the liquid level in the material cylinder body 1. When the liquid level is lower than the set minimum liquid level value, the control system 21 controls the regulating valve 2 to adjust the opening degree, increasing the flow rate of the material liquid, thereby increasing the liquid level in the material cylinder body 1.

[0029] Preferably, the control system 21 is a PLC control system.

[0030] It should be noted that by installing a capacitive level gauge 3 inside the material cylinder body 1, the capacitive level gauge 3 can determine the liquid level information through the two poles formed by the metal rod and the side wall of the material cylinder body 1, which effectively improves the detection accuracy. The capacitive level gauge 3 can avoid interference from the liquid and can be used in the material cylinder of a filling machine with a low height. At the same time, a regulating valve 2 is installed at the feed inlet of the material cylinder body 1. The control system 21 can control the opening of the regulating valve 2 according to the liquid level information, which can achieve the effect of precise control of the liquid level and avoid the situation of overflowing or lack of material.

[0031] In one embodiment, adjacent capacitive level gauges 3 are spaced apart, and the included angle between adjacent capacitive level gauges 3 is 90°.

[0032] In this embodiment, the liquid level detection component includes four capacitive liquid level gauges 3, which are spaced apart from each other and the included angle between adjacent capacitive liquid level gauges 3 is 90°. This enables multi-point detection of the liquid level inside the material cylinder body 1. The control system 21 sums the liquid level values ​​measured by the four capacitive liquid level gauges 3 and takes the average value as the liquid level value inside the material cylinder body 1, which effectively improves the detection accuracy of the liquid level.

[0033] In one embodiment, the inlet of the material cylinder body 1 is connected to the outlet of the storage tank 5 through the material conveying pipe 4. The material conveying pipe 4 is equipped with a feeding pump 6, and a regulating valve 2 is set at one end of the material conveying pipe 4 near the inlet of the material cylinder body 1. The regulating valve 2 is located between the feeding pump 6 and the inlet of the material cylinder body 1.

[0034] In this embodiment, as Figure 1 As shown, the material cylinder body 1 is connected to the storage tank 5 through the material delivery pipe 4. The material pump 6 draws the material liquid in the storage tank 5 into the material delivery pipe 4 and delivers it to the material cylinder body 1 through the material delivery pipe 4. The regulating valve 2 is set on the material delivery pipe 4. The control system 21 can regulate the amount of material liquid entering the material cylinder body 1 from the material delivery pipe 4 by controlling the regulating valve 2.

[0035] In one embodiment, a return pipe 7 is also included. The inlet end of the return pipe 7 is connected to the liquid conveying pipe 4. The connection between the return pipe 7 and the liquid conveying pipe 4 is located between the regulating valve 2 and the inlet of the cylinder body 1. A return valve 8 is provided on the return pipe 7 and is connected to the control system 21.

[0036] In this embodiment, as Figure 1 As shown, the return pipe 7 is located between the regulating valve 2 and the inlet of the material cylinder body 1. A portion of the liquid material passing through the regulating valve 2 enters the return pipe 7 and flows along it into the storage tank 5, forming a circulation. A return valve 8 is installed on the return pipe 7, which is normally open during filling. This liquid return ensures that the material cylinder body 1 always contains liquid at the set level. Furthermore, for liquids containing multiple components, the return flow promotes uniform mixing within the storage tank 5.

[0037] In one embodiment, the liquid conveying pipe 4 is connected to the hot water pipe 9, and the hot water pipe 9 is equipped with a hot water valve 10, which is connected to the control system 21 via signal.

[0038] In this embodiment, as Figure 1 As shown, after production is completed, the control system 21 opens the hot water valve 10, allowing the hot water in the hot water pipe 9 to enter the liquid conveying pipe 4, pushing the liquid in the liquid conveying pipe 4 to the material cylinder body 1. After all the liquid in the liquid conveying pipe 4 has entered the material cylinder body 1, the control system 21 closes the hot water valve 10.

[0039] In one embodiment, the discharge port of the storage tank 5 is provided with a discharge valve 11.

[0040] In this embodiment, as Figure 1 As shown, the discharge valve 11 is connected to the control system 21 via a signal. When production is completed, the control system 21 controls the discharge valve 11 to close, and then controls the hot water valve 10 to open.

[0041] In this embodiment, as Figure 1 As shown, a feed valve 12 is provided between the discharge valve 11 and the feed pump 6.

[0042] In one embodiment, the liquid delivery pipe 4 is connected to one end of the CIP cleaning pipe 13, the other end of the CIP cleaning pipe 13 is connected to the CIP cleaning device, and a CIP cleaning valve 14 is provided on the CIP cleaning pipe 13. The CIP cleaning valve 14 is connected to the control system 21 via signal.

[0043] In this embodiment, as Figure 1 As shown, when the material cylinder body 1 needs to be cleaned, the control system 21 controls the discharge valve 11 to close and the CIP cleaning valve 14 to open. The cleaning fluid of the CIP cleaning device (not shown) flows into the material delivery pipe 4 through the CIP cleaning pipe 13 and into the material cylinder body 1 through the material delivery pipe 4. After cleaning is completed, the control system 21 controls the CIP cleaning valve 14 to close and the hot water valve 10 to open, so that the hot water in the hot water pipe 9 enters the material delivery pipe 4 to rinse the residual cleaning fluid in the material delivery pipe 4 and the material cylinder body 1. After rinsing is completed, the control system 21 closes the hot water valve 10.

[0044] In one embodiment, the feed cylinder body 1 has a first discharge pipe 15, a first discharge valve 16 on the first discharge pipe 15, a feed liquid conveying pipe 4 connected to a second discharge pipe 17, a second discharge valve 18 on the second discharge pipe 17, and the second discharge pipe 17 is located between the feed pump 6 and the regulating valve 2.

[0045] In this embodiment, as Figure 1 As shown, the first discharge pipe 15 can discharge the cleaning liquid or hot water used for rinsing the cleaning liquid from the material cylinder body 1, and the second discharge pipe 17 can discharge the cleaning liquid or hot water used for rinsing the cleaning liquid from the material delivery pipe 4. After cleaning is completed, the control system 21 controls the first discharge valve 16 and the second discharge valve 18 to open, discharging the cleaning liquid from the material cylinder body 1 and the material delivery pipe 4. Then, the first discharge valve 16 and the second discharge valve 18 are closed, and the hot water valve 10 is opened. After hot water rinsing is completed, the hot water valve 10 is closed, and the first discharge valve 16 and the second discharge valve 18 are opened again to discharge the hot water used for rinsing the cleaning liquid from the material cylinder body 1 and the material delivery pipe 4.

[0046] In one embodiment, an overflow hole 19 is provided on the side wall of the material cylinder body 1, and the overflow hole 19 is connected to the overflow pipe 20.

[0047] In this embodiment, as Figure 1 As shown, an overflow hole 19 is provided on the side wall of the material cylinder body 1. The overflow hole 19 is located at the upper end of the side wall and is connected to the overflow pipe 20. When the liquid level of the material in the material cylinder body 1 exceeds the overflow hole 19, the material can enter the overflow pipe 20 through the overflow hole 19 to prevent overflow.

[0048] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A liquid level control device for a filling machine's material cylinder, characterized in that, include: The material cylinder body (1) has an inlet equipped with a regulating valve (2) and an outlet connected to the filling machine. The liquid level detection component includes at least one capacitive liquid level gauge (3), the detection end of the capacitive liquid level gauge (3) is disposed inside the material cylinder body (1), the detection end of the capacitive liquid level gauge (3) has a metal rod, and the metal rod and the side wall of the material cylinder body (1) respectively constitute the two poles of the capacitive liquid level gauge (3). The control system (21) is connected to the capacitive level gauge (3) and the regulating valve (2) respectively.

2. The filling machine material cylinder liquid level control device according to claim 1, characterized in that, The capacitive level gauges (3) are arranged at intervals, and the included angle between the adjacent capacitive level gauges (3) is 90°.

3. The filling machine material cylinder liquid level control device according to claim 1 or 2, characterized in that, The inlet of the material cylinder body (1) is connected to the outlet of the storage tank (5) through the material delivery pipe (4). The material delivery pipe (4) is equipped with a feeding pump (6). The regulating valve (2) is located at the end of the material delivery pipe (4) near the inlet of the material cylinder body (1). The regulating valve (2) is located between the feeding pump (6) and the inlet of the material cylinder body (1).

4. The filling machine material cylinder liquid level control device according to claim 3, characterized in that, It also includes a return pipe (7), the inlet end of which is connected to the liquid conveying pipe (4), the connection between the return pipe (7) and the liquid conveying pipe (4) is located between the regulating valve (2) and the inlet of the material cylinder body (1), and a return valve (8) is provided on the return pipe (7), which is connected to the control system (21).

5. The filling machine material cylinder liquid level control device according to claim 3, characterized in that, The liquid delivery pipe (4) is connected to the hot water pipe (9), and a hot water valve (10) is provided on the hot water pipe (9). The hot water valve (10) is connected to the control system (21) via signal.

6. The filling machine material cylinder liquid level control device according to claim 5, characterized in that, The discharge port of the storage tank (5) is equipped with a discharge valve (11).

7. The filling machine material cylinder liquid level control device according to claim 6, characterized in that, A feed valve (12) is provided between the discharge valve (11) and the feed pump (6).

8. The filling machine material cylinder liquid level control device according to claim 3, characterized in that, The liquid delivery pipe (4) is connected to one end of the CIP cleaning pipe (13), and the other end of the CIP cleaning pipe (13) is connected to the CIP cleaning device. A CIP cleaning valve (14) is provided on the CIP cleaning pipe (13), and the CIP cleaning valve (14) is connected to the control system (21) via signal.

9. The filling machine material cylinder liquid level control device according to claim 8, characterized in that, The material cylinder body (1) has a first discharge pipe (15), the first discharge pipe (15) has a first discharge valve (16), the material liquid conveying pipe (4) is connected to the second discharge pipe (17), the second discharge pipe (17) has a second discharge valve (18), and the second discharge pipe (17) is located between the feeding pump (6) and the regulating valve (2).

10. The filling machine material cylinder liquid level control device according to claim 1, characterized in that, The side wall of the material cylinder body (1) is provided with an overflow hole (19), which is connected to the overflow pipe (20).

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