Liquid level control system of liquid milk filling machine

Abstract

The utility model provides a liquid level control system of a liquid milk filling machine, and belongs to the technical field of liquid level control. Comprising a signal acquisition module, a data display module, a control module and an execution module. The signal acquisition device is connected with the data display module; the data display module is connected with the control module; the control module is connected with the execution module; the signal acquisition module is used for acquiring the liquid level value of the liquid milk filling machine; the data display module is used for displaying the liquid level value; the control module is used for controlling opening and closing of the execution module; and the execution module is used for controlling opening and closing of the feeding valve. The improvement of the control circuit not only simplifies the circuit structure and reduces the cost of accessories, but also effectively solves the problems of foam and unstable net content of products possibly occurring in production, and provides powerful guarantee for stable operation of a production line.

Description

Technical Field

[0001] The present application relates to a liquid level control system for a liquid milk filling machine, and belongs to the technical field of liquid level control. Background Art

[0002] After an in-depth analysis of the operation mode of the existing liquid filling machine, we found that its balance cylinder uses an analog method to control the feed valve. When the liquid level reaches 80% of the balance cylinder, the controlled valve opening is only 20% of the 1cm stroke. This smaller opening causes the milk transferred from the sterile tank to the balance cylinder to form foam due to the greater pressure. These foams then enter the finished bag, seriously affecting the stability of the net content of the product. In view of the aseptic filling characteristics of liquid milk, it is necessary to wait at least 2 hours during the production process to remove the foam on the probe or perform cleaning operations, which undoubtedly increases production costs. In view of this problem, it is necessary for us to optimize the existing control method to improve production efficiency and product quality. Utility Model Content

[0003] A brief overview of the present invention is given below in order to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify key or important parts of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0004] In view of this, in order to solve the technical problems existing in the prior art, the utility model provides a liquid level control system for a liquid milk filling machine.

[0005] A liquid level control system for a liquid milk filling machine, comprising a signal acquisition module, a data display module, a control module and an execution module;

[0006] The signal acquisition module is connected to the data display module;

[0007] The data display module is connected to the control module; the control module is connected to the execution module;

[0008] The signal acquisition module is used to collect the liquid level value of the liquid milk filling machine;

[0009] The data display module is used to display the liquid level value;

[0010] The control module is used to control the opening and closing of the execution module;

[0011] The execution module is used to control the opening and closing of the feed valve.

[0012] Preferably, the signal acquisition module is a balance bar probe, and the balance bar probe is connected to the balance cylinder through a sanitary clamp.

[0013] Preferably, the data display module is a SWP Changhui table.

[0014] Preferably, the control module is an intermediate relay.

[0015] Preferably, the execution module is a solenoid valve.

[0016] Preferably, a control circuit of a liquid level control system of a liquid milk filling machine comprises a balance bar probe, an intermediate relay, a DC24 terminal, a SWP Changhui meter and a solenoid valve; the balance bar probe, the intermediate relay, the DC24 terminal, the SWP Changhui meter and the solenoid valve constitute a control loop;

[0017] The positive electrode of the balance bar probe is connected to the positive electrode of the DC24 terminal;

[0018] The positive pole of the DC24 terminal is respectively connected to the intermediate relay and the positive pole of the SWP Changhui meter, and the positive pole of the SWP Changhui meter is connected to the solenoid valve;

[0019] The negative pole of the balance bar probe is connected to the negative pole of the SWP Changhui meter, and the negative pole of the SWP Changhui meter is connected to the negative pole of DC24V.

[0020] The beneficial effects of the utility model are as follows: the utility model ensures the stability of the net content of the dairy filling machine and the continuous and reliable operation of the equipment, and realizes the precise control of the liquid level of the material balance cylinder. The utility model cleverly uses the hysteresis control mechanism of the instrument, and realizes the precise control of the liquid level value in the material balance cylinder by automatically adjusting the switch state of the feed valve, thereby improving the stability and accuracy of the filling process, and also providing a solid guarantee for the efficient and safe operation of the dairy production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a schematic diagram of a liquid level control system for a liquid milk filling machine;

[0023] Figure 2 The figure is a schematic diagram of a liquid level control circuit for a liquid milk filling machine. DETAILED DESCRIPTION

[0024] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0025] Example 1, reference Figure 1-Figure 2 To illustrate this embodiment, a liquid level control system for a liquid milk filling machine includes a signal acquisition module, a data display module, a control module and an execution module;

[0026] The signal acquisition module is connected to the data display module;

[0027] The signal acquisition module is a balance bar probe, which is connected to the balance cylinder through a sanitary clamp. The material is 316L stainless steel;

[0028] The data display module is a SWP Changhui table;

[0029] The data display module is connected to the control module; the control module is connected to the execution module; the control module is an intermediate relay, and the execution module is a solenoid valve;

[0030] The signal acquisition module is used to collect the liquid level value of the liquid milk filling machine;

[0031] The data display module is used to display the liquid level value;

[0032] The control module is used to control the opening and closing of the execution module;

[0033] The execution module is used to control the opening and closing of the feed valve.

[0034] When the SWP Changhui meter signal value is 4MA, the balance cylinder of the liquid milk filling machine is in an empty cylinder state; and when the SWP Changhui meter signal value is 20MA, the balance cylinder is full.

[0035] Combined with the height of the feed pipe of the balance cylinder, when the value displayed by the SWP Changhui meter reaches 17, the liquid level in the balance cylinder is already higher than the feed pipe. Using the hysteresis control function of the SWP Changhui meter, the hysteresis value is set to 1. When the liquid level value is as low as 16, the system will automatically open the solenoid valve, which controls the feed valve to open and introduce milk into the balance cylinder; once the value exceeds 18, the solenoid valve controls the feed valve to close, thereby ensuring that the liquid level in the balance cylinder is always in a stable state. This design effectively solves the problem of small milk intake and easy foaming when the original control is at 20%, and also significantly improves the stability of the system.

[0036] A control circuit of a liquid level control system for a liquid milk filling machine includes a balance bar probe, an intermediate relay, a DC24 terminal, a SWP Changhui meter and a solenoid valve; the balance bar probe, the intermediate relay, the DC24 terminal, the SWP Changhui meter and the solenoid valve constitute a control loop;

[0037] The positive electrode of the balance bar probe is connected to the positive electrode of the DC24 terminal;

[0038] The positive pole of the DC24 terminal is respectively connected to the intermediate relay and the positive pole of the SWP Changhui meter, and the positive pole of the SWP Changhui meter is connected to the solenoid valve;

[0039] The DC24V terminal is arranged on the DC24 power supply output terminal block in the equipment cabinet;

[0040] The intermediate relay adopts the Omron MY2N-J model, and its normally open contact provides a stable DC24V power supply for the balance cylinder probe.

[0041] When the equipment is being cleaned, the power supply to the balance cylinder probe is automatically stopped to achieve full cylinder cleaning.

[0042] The negative pole of the balance bar probe is connected to the negative pole of the SWP Changhui meter, and the negative pole of the SWP Changhui meter is connected to the negative pole of DC24V.

[0043] In the SWP Changhui meter, the relay with high liquid level output realizes high liquid level control by using its normally closed contact. When the liquid level reaches a high level, the relay is energized and disconnects the positive pole of DC24, thereby de-energizing the solenoid valve and closing the feed valve. The relay with low liquid level output realizes low liquid level control by using its normally open contact. When the liquid level in the balance cylinder is low, the low liquid level relay is energized and connected to the positive pole of DC24, so that the solenoid valve is energized and opens the feed valve for feeding.

[0044] The power supply of SWP Changhui meter is AC220V, which is taken from the AC terminal in the equipment cabinet, and the control solenoid valve of the feed valve uses the AirTac 3V10 DC24 power supply solenoid valve. By controlling the power-on and power-off state of the solenoid valve, the air source switch can be accurately controlled, thereby further controlling the switch of the feed valve.

[0045] In the liquid level balance cylinder, the change of liquid level will be displayed in real time on the SWP Changhui meter. The alarm values ​​AL1 and AL2 and the size of the hysteresis value can be flexibly set and modified through the intuitive buttons on the meter. The transformation of this practical control circuit not only simplifies the circuit structure and reduces the cost of accessories, but also effectively solves the foam problem and the unstable net content of the product that may occur in production, providing a strong guarantee for the stable operation of the production line.

[0046] Although the utility model has been described according to a limited number of embodiments, it will be apparent to those skilled in the art, with the benefit of the above description, that other embodiments may be envisioned within the scope of the utility model described herein. In addition, it should be noted that the language used in this specification is selected primarily for readability and teaching purposes, rather than for the purpose of explaining or limiting the subject matter of the utility model. Therefore, many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the utility model is illustrative rather than restrictive with respect to the scope of the utility model, and the scope of the utility model is defined by the appended claims.

Claims

1. A liquid level control system for a liquid milk filling machine, characterized in that: It includes a signal acquisition module, a data display module, a control module and an execution module; The signal acquisition module is connected to the data display module; The data display module is connected to the control module; the control module is connected to the execution module; The signal acquisition module is used to collect the liquid level value of the liquid milk filling machine; The data display module is used to display the liquid level value; The control module is used to control the opening and closing of the execution module; The execution module is used to control the opening and closing of the feed valve.

2. According to claim 1, a liquid level control system for a liquid milk filling machine is characterized in that: The signal acquisition module is a balance bar probe, and the balance bar probe is connected to the balance cylinder through a sanitary clamp.

3. According to claim 2, a liquid level control system for a liquid milk filling machine is characterized in that: The data display module is a SWP Changhui table.

4. According to claim 3, a liquid level control system for a liquid milk filling machine is characterized in that: The control module is an intermediate relay.

5. The liquid level control system of a liquid milk filling machine according to claim 4, characterized in that: The execution module is a solenoid valve.

6. A liquid level control system for a liquid milk filling machine according to claim 5, characterized in that: A control circuit of a liquid level control system for a liquid milk filling machine includes a balance bar probe, an intermediate relay, a DC24 terminal, a SWP Changhui meter and a solenoid valve; the balance bar probe, the intermediate relay, the DC24 terminal, the SWP Changhui meter and the solenoid valve constitute a control loop; The positive electrode of the balance bar probe is connected to the positive electrode of the DC24 terminal; The positive pole of the DC24 terminal is respectively connected to the intermediate relay and the positive pole of the SWP Changhui meter, and the positive pole of the SWP Changhui meter is connected to the solenoid valve; The negative pole of the balance bar probe is connected to the negative pole of the SWP Changhui meter, and the negative pole of the SWP Changhui meter is connected to the negative pole of DC24V.

Images