Combined metering pump feeding device

Abstract

The utility model relates to the technical field of metering pump feeding equipment, in particular to a combined metering pump feeding device which comprises a feeding pipeline, a discharging pipeline, a first volumetric metering pump, a second volumetric metering pump, a driving system and a PLC (programmable logic controller). The driving system comprises a first servo motor, a second servo motor, a first rolling screw rod and a second rolling screw rod; the first servo motor drives the first rolling screw rod to drive the pump head of the first volumetric metering pump to reciprocate; and the second servo motor drives the second rolling screw rod to drive the pump head of the second volumetric metering pump to reciprocate. The utility model has the beneficial effects that the two volumetric metering pumps are matched with the servo motor and the PLC, so that the problem of control precision stability is effectively solved, and the accuracy and the stability of fermentation feeding are improved. And the use requirements of a fermentation workshop under the working conditions of small material supplementing amount, high material supplementing precision requirement and influence of pipeline pressure and in-tank back pressure fluctuation are met.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pump feeding equipment, in particular to a combined metering pump feeding device. Background Art

[0002] As a prerequisite for the synthesis of daptomycin, C material needs to be supplemented during the fermentation process. Too much will cause the death of the bacteria, and too little will affect the yield, so a fixed amount of supplementation is required. Originally, peristaltic pumps or plunger pumps were used to supplement the material on site. During the feeding process, the pipeline is under pressure and the fermentation tank has back pressure. Peristaltic pumps and plunger pumps cannot accurately measure and cannot meet the fermentation workshop's requirements for small feeding amounts and high feeding accuracy. In addition, the fluctuation of pipeline pressure and back pressure in the tank also affects accurate feeding. The standard volumetric pump on the market cannot meet the feeding speed of 5-500ml / min. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a combined metering pump feeding device which can improve the accuracy and stability of fermentation feeding.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: to provide a combined metering pump feeding device, including a feed pipe, a discharge pipe, a first volumetric metering pump, a second volumetric metering pump, a drive system and a PLC controller;

[0005] The feed pipeline is connected to the first volumetric metering pump and the second volumetric metering pump respectively through a feed tee; a first feed solenoid valve is provided between the feed tee and the first volumetric metering pump; a second feed solenoid valve is provided between the feed tee and the second volumetric metering pump;

[0006] The discharge pipeline is connected to the first volumetric metering pump and the second volumetric metering pump respectively through a discharge tee; a first discharge solenoid valve is provided between the discharge tee and the first volumetric metering pump; a second discharge solenoid valve is provided between the discharge tee and the second volumetric metering pump;

[0007] The driving system comprises a first servo motor, a second servo motor, a first rolling screw and a second rolling screw;

[0008] The first servo motor drives the first rolling screw to drive the pump head of the first volumetric metering pump to reciprocate;

[0009] The second servo motor drives the second rolling screw to drive the pump head of the second volumetric metering pump to reciprocate;

[0010] The first feed solenoid valve, the second feed solenoid valve, the first discharge solenoid valve, the second discharge solenoid valve, and the drive system are electrically connected to the PLC controller.

[0011] Furthermore, in the above-mentioned combined metering pump feeding device, a feed valve is provided on the feed pipeline, and a discharge valve is provided on the discharge pipeline.

[0012] Furthermore, in the above-mentioned combined metering pump feeding device, a first synchronous wheel is provided on the first servo motor, a first driven wheel is provided at one end of the first rolling screw, and a synchronous belt transmission connection is provided between the first synchronous wheel and the first driven wheel.

[0013] Furthermore, in the above-mentioned combined metering pump feeding device, a second synchronous wheel is provided on the second servo motor, a second driven wheel is provided at one end of the second rolling screw, and a synchronous belt transmission connection is provided between the second synchronous wheel and the second driven wheel.

[0014] Furthermore, in the above-mentioned combined metering pump feeding device, the driving system also includes a first planetary reducer and a second planetary reducer, the first servo motor is connected to the first planetary reducer; and the second servo motor is connected to the second planetary reducer.

[0015] The beneficial effects of the utility model are: in order to overcome the previous on-site feeding using peristaltic pumps and plunger pumps, which are affected by pipeline pressure and tank back pressure fluctuations, making feeding unstable and inaccurate, seriously affecting the production process requirements, the utility model uses two combined volumetric metering pumps with servo motors and PLCs to effectively solve the problem of control accuracy stability, improve the accuracy and stability of fermentation feeding, and is not affected by inherent pipeline pressure and tank back pressure. The metering range is wide, and the servo motor drives the rolling screw to rotate and drive the pump head of the volumetric metering pump to reciprocate. The combination has high resolution accuracy and a wide system metering range. It can meet the use requirements of the fermentation workshop under working conditions where the feeding amount is small, the feeding accuracy requirements are high, and the feeding is affected by pipeline pressure and tank back pressure fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a combined metering pump feeding device in a specific embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the relevant structure of a single metering pump of the combined metering pump feeding device in a specific embodiment of the utility model;

[0018] Description of label;

[0019] 1. Feed pipeline; 11. First feed solenoid valve; 12. Second feed solenoid valve; 2. Discharge pipeline; 21. First discharge solenoid valve; 22. Second discharge solenoid valve;

[0020] 3. First volumetric metering pump; 31. First servo motor; 32. First synchronous wheel; 33. First rolling screw; 34. First driven wheel; 35. Synchronous belt; 36. Pump head;

[0021] 4. Second volumetric metering pump. DETAILED DESCRIPTION

[0022] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0023] See also Figure 1 to Figure 2 The utility model provides a combined metering pump feeding device, comprising a feed pipe 1, a discharge pipe 2, a first volumetric metering pump 3, a second volumetric metering pump 4, a driving system and a PLC controller;

[0024] The feed pipeline 1 is connected to the first volumetric metering pump 3 and the second volumetric metering pump 4 respectively through a feed tee; a first feed solenoid valve 11 is provided between the feed tee and the first volumetric metering pump 3; a second feed solenoid valve 12 is provided between the feed tee and the second volumetric metering pump 4;

[0025] The discharge pipe 2 is connected to the first volumetric metering pump 3 and the second volumetric metering pump 4 respectively through a discharge tee pipe; a first discharge solenoid valve 21 is provided between the discharge tee pipe and the first volumetric metering pump 3; a second discharge solenoid valve 22 is provided between the discharge tee pipe and the second volumetric metering pump 4;

[0026] The driving system includes a first servo motor 31, a second servo motor, a first rolling screw 33 and a second rolling screw;

[0027] The first servo motor 31 drives the first rolling screw 33 to drive the pump head 36 of the first volumetric metering pump 3 to reciprocate;

[0028] The second servo motor drives the second rolling screw to drive the pump head 36 of the second volumetric metering pump 4 to reciprocate;

[0029] The first feed solenoid valve 11, the second feed solenoid valve 12, the first discharge solenoid valve 21, the second discharge solenoid valve 22, and the drive system are electrically connected to the PLC controller.

[0030] Furthermore, in the above-mentioned combined metering pump feeding device, the feed pipe 1 is provided with a feed valve, and the discharge pipe 2 is provided with a discharge valve.

[0031] Furthermore, in the above-mentioned combined metering pump feeding device, a first synchronous wheel 32 is provided on the first servo motor 31, a first driven wheel 34 is provided at one end of the first rolling screw 33, and a synchronous belt 35 is provided between the first synchronous wheel 32 and the first driven wheel 34 for transmission connection.

[0032] Furthermore, in the above-mentioned combined metering pump feeding device, a second synchronous wheel is provided on the second servo motor, a second driven wheel is provided at one end of the second rolling screw, and a synchronous belt 35 is provided between the second synchronous wheel and the second driven wheel for transmission connection.

[0033] Furthermore, in the above-mentioned combined metering pump feeding device, the driving system also includes a first planetary reducer and a second planetary reducer, the first servo motor 31 is connected to the first planetary reducer; and the second servo motor is connected to the second planetary reducer.

[0034] The beneficial effects of the utility model are: in order to overcome the previous on-site feeding using peristaltic pumps and plunger pumps, which are affected by pipeline pressure and tank back pressure fluctuations, making feeding unstable and inaccurate, seriously affecting the production process requirements, the combined metering pump feeding device of the utility model uses two combined volumetric metering pumps with servo motors and PLCs, effectively solving the problem of control accuracy stability, improving the accuracy and stability of fermentation feeding, not affected by inherent pipeline pressure and tank back pressure, with a wide metering range, the servo motor drives the rolling screw to rotate and drives the pump head 36 of the volumetric metering pump to reciprocate, the combination resolution accuracy is high, and the system metering range is wide. It can meet the use requirements of the fermentation workshop under the working conditions of small feeding amount, high feeding accuracy requirements and affected by pipeline pressure and tank back pressure fluctuations.

[0035] Embodiment 1

[0036] Application scenario: The existing technology uses peristaltic pumps and plunger pumps to feed materials, which are unstable and inaccurate due to fluctuations in pipeline pressure and back pressure in the tank, seriously affecting production process requirements.

[0037] like Figure 1 As shown in FIG. 2 , this embodiment provides a combined metering pump feeding device, including a feed pipe 1, a discharge pipe 2, a first volumetric metering pump 3, a second volumetric metering pump 4, a drive system and a PLC controller;

[0038] The feed pipeline 1 is connected to the first volumetric metering pump 3 and the second volumetric metering pump 4 respectively through a feed tee; a first feed solenoid valve 11 is provided between the feed tee and the first volumetric metering pump 3; a second feed solenoid valve 12 is provided between the feed tee and the second volumetric metering pump 4;

[0039] The discharge pipe 2 is connected to the first volumetric metering pump 3 and the second volumetric metering pump 4 respectively through a discharge tee pipe; a first discharge solenoid valve 21 is provided between the discharge tee pipe and the first volumetric metering pump 3; a second discharge solenoid valve 22 is provided between the discharge tee pipe and the second volumetric metering pump 4;

[0040] The driving system includes a first servo motor 31, a second servo motor, a first rolling screw 33 and a second rolling screw;

[0041] The first servo motor 31 drives the first rolling screw 33 to drive the pump head 36 of the first volumetric metering pump 3 to reciprocate;

[0042] The second servo motor drives the second rolling screw to drive the pump head 36 of the second volumetric metering pump 4 to reciprocate;

[0043] The first feed solenoid valve 11, the second feed solenoid valve 12, the first discharge solenoid valve 21, the second discharge solenoid valve 22, and the drive system are electrically connected to the PLC controller.

[0044] In the combined metering pump feeding device, the first servo motor 31 is provided with a first synchronous wheel 32, one end of the first rolling screw 33 is provided with a first driven wheel 34, and a synchronous belt 35 is provided between the first synchronous wheel 32 and the first driven wheel 34 for transmission connection. The second servo motor is provided with a second synchronous wheel, one end of the second rolling screw is provided with a second driven wheel, and a synchronous belt 35 is provided between the second synchronous wheel and the second driven wheel for transmission connection.

[0045] The driving system further comprises a first planetary reducer and a second planetary reducer, wherein the first servo motor 31 is connected to the first planetary reducer; and the second servo motor is connected to the second planetary reducer.

[0046] Use of the above combined metering pump feeding device:

[0047] Step 1, the PLC controller controls the first feed solenoid valve 11 to open, and the PLC controller controls the drive system to enable the first volumetric metering pump 3 to start feeding;

[0048] Step 2, after the first volumetric metering pump 3 has finished feeding, the first feeding solenoid valve 11 is closed, and the first discharging solenoid valve 21 is opened, the PLC controller controls the driving system to start the first volumetric metering pump 3 to discharge (the servo motor rotates to drive the rolling screw to rotate on the frame, the rolling screw rotates, so that the nut threadedly connected to the rolling screw moves linearly, and then the nut fixed to the pump head 36 drives the pump head 36 of the metering pump to move linearly), and the filling begins;

[0049] Step 3: When the first volumetric metering pump 3 is in operation, the second feed solenoid valve 12 is opened, and the PLC controller controls the drive system to enable the second volumetric metering pump 4 to start feeding;

[0050] Step 4: After the second volumetric metering pump 4 has finished feeding, the second feeding solenoid valve 12 is closed and the system is waiting;

[0051] Step 5: After the first volumetric metering pump 3 has finished discharging, the first discharging solenoid valve 21 is closed, and the second discharging solenoid valve 22 is opened, and the PLC controller controls the drive system to start the second volumetric metering pump 4 to discharge;

[0052] Step 6: The first volumetric metering pump 3 and the second volumetric metering pump 4 are operated alternately to complete continuous and uninterrupted feeding.

[0053] The verification data of the combined metering pump feeding device using an electronic scale are shown in Table 1 below;

[0054] Table 1

[0055] show 0.5L 1L 5L 10L Weighing data 0.435kg 0.873kg 4.36kg 8.72kg

[0056] Note: The density of C material is 0.874kg / L.

[0057] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A combined metering pump feeding device, characterized in that: It includes a feed pipe, a discharge pipe, a first volumetric metering pump, a second volumetric metering pump, a drive system and a PLC controller; The feed pipeline is connected to the first volumetric metering pump and the second volumetric metering pump respectively through a feed tee; a first feed solenoid valve is provided between the feed tee and the first volumetric metering pump; a second feed solenoid valve is provided between the feed tee and the second volumetric metering pump; The discharge pipeline is connected to the first volumetric metering pump and the second volumetric metering pump respectively through a discharge tee; a first discharge solenoid valve is provided between the discharge tee and the first volumetric metering pump; a second discharge solenoid valve is provided between the discharge tee and the second volumetric metering pump; The driving system comprises a first servo motor, a second servo motor, a first rolling screw and a second rolling screw; The first servo motor drives the first rolling screw to drive the pump head of the first volumetric metering pump to reciprocate; The second servo motor drives the second rolling screw to drive the pump head of the second volumetric metering pump to reciprocate; The first feed solenoid valve, the second feed solenoid valve, the first discharge solenoid valve, the second discharge solenoid valve, and the drive system are electrically connected to the PLC controller.

2. The combined metering pump feeding device according to claim 1, characterized in that: The feed pipe is provided with a feed valve, and the discharge pipe is provided with a discharge valve.

3. The combined metering pump feeding device according to claim 1 is characterized in that: The first servo motor is provided with a first synchronous wheel, one end of the first rolling screw is provided with a first driven wheel, and a synchronous belt transmission connection is provided between the first synchronous wheel and the first driven wheel.

4. The combined metering pump feeding device according to claim 1, characterized in that: The second servo motor is provided with a second synchronous wheel, one end of the second rolling screw is provided with a second driven wheel, and a synchronous belt transmission connection is provided between the second synchronous wheel and the second driven wheel.

5. The combined metering pump feeding device according to claim 1, characterized in that: The drive system further includes a first planetary reducer and a second planetary reducer, the first servo motor is connected to the first planetary reducer; and the second servo motor is connected to the second planetary reducer.

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