Rotary filling device and rotary filling method
By grouping filling valves and adopting a PLC-controlled constant pressure and constant liquid level mechanism, the flow meter can be shared, solving the problem of high equipment cost, ensuring the stability and reliability of the filling process, and improving market competitiveness.
Patent Information
- Application Number
- CN202511503403.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2025-12-09
AI Technical Summary
In existing rotary filling equipment, a flow meter is installed on the inlet pipeline corresponding to each filling valve. The larger the equipment capacity and the more workstations there are, the more flow meters are needed, which leads to excessively high equipment costs and reduces market competitiveness.
A rotary filling device is adopted, which groups the filling valves, with each group of filling valves sharing a flow meter. The constant pressure and constant liquid level mechanism controlled by PLC maintains the pressure and liquid level in the liquid cylinder, thereby realizing the sharing of flow meters and reducing the number of flow meters.
It effectively reduces equipment costs while ensuring the stability and reliability of the filling process, thereby enhancing the equipment's competitiveness.
Smart Images
Figure CN121085199A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of liquid filling equipment. BACKGROUND
[0002] The rotary filling device comprises a rotary body, a plurality of work stations are arranged at intervals on the rotary body, one filling valve is arranged on each work station, each filling valve is connected with a liquid inlet pipeline, each liquid inlet pipeline is connected with a liquid cylinder, and a flow meter for measuring liquid is arranged on each liquid inlet pipeline.
[0003] The rotary filling device has the following defects: a flow meter is arranged on each liquid inlet pipeline corresponding to each filling valve, the larger the production capacity of the device, the more the work stations and the filling valves, and the more the flow meters required, which obviously greatly increases the cost of the device and greatly reduces the market competitiveness. SUMMARY
[0004] The present application needs to solve the technical problem of providing a rotary filling device and a rotary filling method, which has simple structure, greatly reduced equipment cost and stable and reliable method.
[0005] To solve the above problems, the technical scheme adopted by the present application is as follows: a rotary filling device comprises a rotary seat capable of rotating around the center, a liquid cylinder is arranged on the rotary seat, a feeding pipe is arranged on the liquid cylinder, an air inlet pipe and an air outlet pipe are also arranged on the liquid cylinder, a plurality of filling valves are uniformly and intervaliy arranged on the outer circumference of the rotary seat, a material conveying pipe is connected between each filling valve and the liquid cylinder, a constant pressure mechanism capable of keeping the pressure in the liquid cylinder constant and a constant liquid level mechanism capable of keeping the liquid level constant are arranged on the liquid cylinder, all the filling valves are divided into a plurality of groups along the circumferential direction, and each group has at least two filling valves, the flow rates in the material conveying pipes of each filling valve in the same group are the same, and only the material conveying pipe corresponding to one filling valve in the same group is provided with a flow meter.
[0006] Further, the rotary filling device has the following characteristics: each flow meter is connected with a PLC signal.
[0007] Furthermore, in the aforementioned rotary filling device, the constant pressure mechanism inside the liquid cylinder includes: an intake proportional valve on the intake pipe, an exhaust proportional valve on the exhaust pipe, and a pressure sensor on the liquid cylinder; all pressure sensors are connected to a PLC signal, and the PLC has a preset pressure setpoint. When the pressure sensor detects that the pressure inside the liquid cylinder is less than the pressure setpoint, the PLC controls the intake proportional valve and the exhaust proportional valve respectively, so that the intake volume is greater than the exhaust volume until the pressure inside the liquid cylinder reaches the pressure setpoint; when the pressure sensor detects that the pressure inside the liquid cylinder is greater than the pressure setpoint, the PLC controls the intake proportional valve and the exhaust proportional valve respectively, so that the intake volume is less than the exhaust volume until the pressure inside the liquid cylinder reaches the pressure setpoint.
[0008] Furthermore, in the aforementioned rotary filling device, the constant liquid level mechanism includes: a feed proportional valve for controlling the feed speed on the feed pipe, a liquid level sensor for monitoring the liquid level in the cylinder on the liquid cylinder, the liquid level sensor being connected to a PLC signal, and a preset liquid level value in the PLC. When the liquid level sensor detects that the liquid level in the cylinder is lower than the liquid level set value, the PLC controls the feed proportional valve to increase the valve opening and increase the feed speed until the liquid level in the cylinder reaches the liquid level set value; when the liquid level sensor detects that the liquid level in the cylinder is higher than the set liquid level, the PLC controls the feed proportional valve to decrease the valve opening and decrease the feed speed until the liquid level in the cylinder reaches the liquid level set value.
[0009] A rotary filling method using the rotary filling device described above; the filling steps include: pre-filling preparation: material enters the liquid cylinder from the feed pipe to the liquid level set value, and gas enters the liquid cylinder from the air inlet pipe until the pressure in the liquid cylinder reaches the pressure set value. First, pre-filling is performed: the flow meter in each set of filling valves measures the amount of filling required for the container to be filled. When the data collected by the flow meter reaches the amount of filling required for the container to be filled, the filling valve corresponding to the flow meter closes. The PLC records the filling time from opening to closing of the filling valve corresponding to the flow meter. Then, the formal filling process begins: the rotary table rotates one revolution, and each set of filling valves on it completes one filling cycle. During each filling cycle, the flow meter in each set of filling valves measures the amount of filling required for the container to be filled. When the data collected by the flow meter reaches the required amount of filling for the container to be filled, the filling valve corresponding to the flow meter closes. The PLC records the filling time from opening to closing of the filling valve corresponding to the flow meter. The first filling time of each filling valve in each set of filling components without a flow meter is the filling time of the pre-filling of the filling valve corresponding to the flow meter in the same set. The filling time of each subsequent filling cycle is the previous filling time of the filling valve corresponding to the flow meter in the same set.
[0010] The advantages of this invention are: This application provides a rotary filling device that adopts reverse thinking, using a single flow meter for multiple filling valves, which greatly saves equipment costs. This application also provides a rotary filling method that uses the above-mentioned rotary filling device to maintain stable liquid level and pressure in the cylinder, thereby achieving effective measurement and control of the filling volume of all filling valves using fewer flow meters than the number of filling valves. The filling is stable and reliable, greatly saving equipment costs and thus effectively improving the competitiveness of the equipment. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the arrangement structure of a rotary filling device according to the present invention.
[0012] Figure 2 This is a structural diagram of a grouping method for filling valves.
[0013] Figure 3 This is a structural diagram of another grouping method for filling valves. Detailed Implementation
[0014] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments.
[0015] like Figure 1 , Figure 2 , Figure 3 As shown, a rotary filling device includes: a rotary seat capable of rotating around a center; a liquid cylinder 1 mounted on the rotary seat; a feed pipe 11 mounted on the liquid cylinder 1; an air inlet pipe 14 and an exhaust pipe 14 mounted on the liquid cylinder 1; and a plurality of filling valves 2 evenly spaced along the circumference of the rotary seat, each filling valve 2 being connected to the liquid cylinder 1 via a material conveying pipe 3. The liquid cylinder 1 is equipped with a constant pressure mechanism to maintain a constant pressure within the liquid cylinder 1 and a constant liquid level mechanism to maintain a constant liquid level.
[0016] In this embodiment, the constant pressure mechanism inside the hydraulic cylinder 1 includes: an intake proportional valve 131 is provided on the intake pipe 13, an exhaust proportional valve 141 is provided on the exhaust pipe 14, and a pressure sensor 15 is also provided on the hydraulic cylinder 1; the pressure sensor 15 is connected to a PLC signal, and a preset pressure setting value is provided in the PLC. When the pressure sensor 15 detects that the pressure inside the hydraulic cylinder 1 is less than the pressure setting value, the PLC controls the intake proportional valve 131 and the exhaust proportional valve 141 to operate, so that the intake volume is greater than the exhaust volume until the pressure inside the hydraulic cylinder 1 reaches the pressure setting value; when the pressure sensor 15 detects that the pressure inside the hydraulic cylinder 1 is greater than the pressure setting value, the PLC controls the intake proportional valve 131 and the exhaust proportional valve 141 to operate, so that the intake volume is less than the exhaust volume until the pressure inside the hydraulic cylinder 1 reaches the pressure setting value.
[0017] The constant liquid level mechanism includes: a feed proportional valve 111 installed on the feed pipe 11 for controlling the feed speed; a liquid level sensor 12 installed on the liquid cylinder 1 for monitoring the liquid level in the cylinder 1; the liquid level sensor 12 is connected to a PLC signal; the PLC has a preset liquid level setting value; when the liquid level sensor 12 detects that the liquid level in the liquid cylinder 1 is lower than the liquid level setting value, the PLC controls the feed proportional valve 111 to increase the valve opening and increase the feed speed until the liquid level in the liquid cylinder 1 reaches the liquid level setting value; when the liquid level sensor 12 detects that the liquid level in the liquid cylinder 1 is higher than the set liquid level, the PLC controls the feed proportional valve to decrease the valve opening and decrease the feed speed until the liquid level in the liquid cylinder reaches the liquid level setting value.
[0018] All filling valves 2 are divided into several groups along the circumference, and each group has at least two filling valves 2. The flow rate in the material conveying pipe 3 corresponding to each filling valve 2 in the same group is the same. Only one filling valve 2 in the same group is equipped with a flow meter 4 on the material conveying pipe 3. Each flow meter 4 is connected to the PLC signal.
[0019] Figure 2 , Figure 3 Two grouping methods are given as examples. Figure 2 All the filling valves displayed are divided into two groups: Group 10 and Group 20. Figure 3 The display shows that all filling valves are divided into eight groups: Group 1 (10 valves), Group 2 (20 valves), Group 3 (30 valves), Group 4 (40 valves), Group 5 (50 valves), Group 6 (60 valves), Group 7 (70 valves), and Group 8 (80 valves). The number of circumferential groups for filling valve 2 is set according to actual needs. Fewer groups mean fewer flow meters are needed, resulting in lower equipment manufacturing costs.
[0020] A rotary filling method includes the following steps.
[0021] Preparation before filling: Material enters liquid cylinder 1 from feed pipe 11 until the liquid level reaches the set value; sterile air enters liquid cylinder 1 from air inlet pipe 13 until the pressure in liquid cylinder 1 reaches the set pressure value.
[0022] Pre-filling is performed first: Each flow meter 4 measures the flow rate in its material conveying pipe 3. When the data collected by the flow meter 4 reaches the required filling amount for the container to be filled, the filling valve 2 corresponding to the material conveying pipe 3 where the flow meter 4 is located closes. The PLC records the pre-filling time from opening to closing of the filling valve 2 corresponding to the material conveying pipe 3 where the flow meter 4 is located.
[0023] Next, the formal filling process begins: the rotary table rotates one revolution, and each filling valve 2 on it completes one filling cycle. During each filling cycle, each flow meter 4 measures the flow rate in its corresponding material conveying pipe 3. When the data collected by the flow meter 4 reaches the required filling volume for the container to be filled, the filling valve 2 corresponding to the material conveying pipe 3 where the flow meter 4 is located closes. The PLC records the filling time from opening to closing of the filling valve 2 corresponding to the material conveying pipe 3 where the flow meter 4 is located. The first filling time of each filling valve in the same group that does not have a flow meter is based on the pre-filling time of the corresponding filling valve in the same group that has a flow meter 4 on its material conveying pipe 3. The filling time for each subsequent filling cycle is based on the previous filling time of the filling valve in the same group that has a flow meter 4 on its material conveying pipe 3.
[0024] During pre-filling and formal filling, material continuously enters the liquid cylinder 1. When the liquid level sensor 12 detects that the liquid level in the liquid cylinder 1 is lower than the set liquid level value, the PLC controls the feed proportional valve 111 to increase the valve opening and increase the feeding speed until the liquid level reaches the set liquid level value. When the liquid level sensor 12 detects that the liquid level in the liquid cylinder 1 is higher than the set liquid level value, the PLC controls the feed proportional valve 111 to decrease the valve opening until the liquid level reaches the set liquid level value. This process ensures that the liquid level in the liquid cylinder 1 remains stable.
[0025] During pre-filling and formal filling, sterile air continuously enters the liquid cylinder 1 through the air inlet pipe 13 and then exits through the exhaust pipe 14. When the pressure sensor 15 detects that the pressure inside the liquid cylinder 1 is lower than the pressure set value, the PLC controls the air intake proportional valve 131 and the exhaust proportional valve 141 respectively to make the air intake volume greater than the exhaust volume until the pressure inside the liquid cylinder 1 reaches the pressure set value. This process ensures stable pressure inside the liquid cylinder 1.
[0026] As can be seen from the above, this application provides a rotary filling device that adopts a reverse thinking approach, using a single flow meter for multiple filling valves, which greatly saves equipment costs. This application also provides a rotary filling method that uses the above-mentioned rotary filling device to maintain stable liquid level and pressure in the cylinder, thereby achieving effective measurement and control of the filling volume of all filling valves using fewer flow meters than the number of filling valves. The filling is stable and reliable, greatly saving equipment costs and thus effectively improving product competitiveness.
Claims
1. A rotary filling device, comprising: A rotary seat capable of rotating around a center is provided with a liquid cylinder, a feed pipe, an air inlet pipe, and an exhaust pipe. Several filling valves are evenly spaced on the outer circumference of the rotary seat, and each filling valve is connected to the liquid cylinder by a material conveying pipe. The key feature is that the liquid cylinder is equipped with a constant pressure mechanism to keep the pressure inside the liquid cylinder constant and a constant liquid level mechanism to keep the liquid level constant. All filling valves are divided into several groups along the circumferential direction, and each group has at least two filling valves. The flow rate in the material conveying pipe of each filling valve in the same group is the same. Only one filling valve in the same group has a flow meter installed on the material conveying pipe corresponding to it.
2. The rotary filling device according to claim 1, characterized in that: Each flow meter is connected to a PLC signal.
3. The rotary filling device according to claim 2, characterized in that: The constant pressure mechanism inside the hydraulic cylinder includes: an intake proportional valve on the intake pipe, an exhaust proportional valve on the exhaust pipe, and a pressure sensor on the hydraulic cylinder; all pressure sensors are connected to a PLC signal. The PLC has a preset pressure setpoint. When the pressure sensor detects that the pressure inside the hydraulic cylinder is less than the pressure setpoint, the PLC controls the intake proportional valve and the exhaust proportional valve respectively, so that the intake volume is greater than the exhaust volume until the pressure inside the hydraulic cylinder reaches the pressure setpoint; when the pressure sensor detects that the pressure inside the hydraulic cylinder is greater than the pressure setpoint, the PLC controls the intake proportional valve and the exhaust proportional valve respectively, so that the intake volume is less than the exhaust volume until the pressure inside the hydraulic cylinder reaches the pressure setpoint.
4. A rotary filling device according to claim 2 or 3, characterized in that: The constant liquid level mechanism includes: a feed proportional valve on the feed pipe for controlling the feed speed; a liquid level sensor on the liquid cylinder for monitoring the liquid level in the cylinder; the liquid level sensor is connected to a PLC signal; the PLC has a preset liquid level setpoint; when the liquid level sensor detects that the liquid level in the cylinder is lower than the liquid level setpoint, the PLC controls the feed proportional valve to increase the valve opening and increase the feed speed until the liquid level in the cylinder reaches the liquid level setpoint; when the liquid level sensor detects that the liquid level in the cylinder is higher than the set liquid level, the PLC controls the feed proportional valve to decrease the valve opening and decrease the feed speed until the liquid level in the cylinder reaches the liquid level setpoint.
5. A rotary filling method, characterized in that: The rotary filling device according to claim 4 is used; the filling steps include: pre-filling preparation: material enters the liquid cylinder from the feed pipe to the liquid level set value, and gas enters the liquid cylinder from the air inlet pipe until the pressure in the liquid cylinder reaches the pressure set value. First, pre-filling is performed: the flow meter in each set of filling valves measures the amount of filling required for the container to be filled. When the data collected by the flow meter reaches the amount of filling required for the container to be filled, the filling valve corresponding to the flow meter closes. The PLC records the filling time from opening to closing of the filling valve corresponding to the flow meter. Then, the formal filling process begins: the rotary table rotates one revolution, and each set of filling valves on it completes one filling cycle. During each filling cycle, the flow meter in each set of filling valves measures the amount of filling required for the container to be filled. When the data collected by the flow meter reaches the required amount of filling for the container to be filled, the filling valve corresponding to the flow meter closes. The PLC records the filling time from opening to closing of the filling valve corresponding to the flow meter. The first filling time of each filling valve in each set of filling components without a flow meter is the filling time of the pre-filling of the filling valve corresponding to the flow meter in the same set. The filling time of each subsequent filling cycle is the previous filling time of the filling valve corresponding to the flow meter in the same set.