A metering pump control method

Abstract

The present application relates to a metering pump control method, comprising the following steps: a control step, wherein the run button is in a normally open state and sends a run signal 0; after the run button is pressed, the run signal 1 is sent, and the run signal 0 is set as the run signal of the metering pump, and the run signal 1 is set as the stop signal of the metering pump; an emergency stop step, wherein after the emergency stop button is pressed, the emergency stop signal 0 is sent, and the emergency stop signal 0 is set as the emergency stop signal of the metering pump; and the run button independently controls the metering pump. The present application has the advantage of being able to reduce the downtime of the metering pump due to transmission problems.

Description

Technical Field

[0001] The present application relates to the technical field of spinning, and in particular to a metering pump control method. Background Art

[0002] Currently, metering pumps operate solely through network communication. The metering pump stop button is normally closed, sending a 1 signal. Pressing the stop button disconnects the signal, returning it to a 0 signal. If communication is lost, all signals return to 0, effectively stopping all metering pumps. Using a network cable can easily lead to communication interruptions due to loose connectors or cable disconnections, causing control to go offline and the metering pump to trip. Summary of the Invention

[0003] In view of the shortcomings of the prior art, one of the purposes of this application is to provide a metering pump control method, which has the advantage of reducing the downtime of the metering pump due to transmission problems.

[0004] The above-mentioned purpose of this application is achieved through the following technical solutions:

[0005] A metering pump control method includes the following steps: a control step, when the run button is in a normally open state, a run signal 0 is sent; after the run button is pressed, a run signal 1 is sent, and the run signal 0 is set as the run signal of the metering pump, and the run signal 1 is set as the stop signal of the metering pump; an emergency stop step, when the emergency stop button is pressed, an emergency stop signal 0 is sent, and the emergency stop signal 0 is set as the emergency stop signal of the metering pump, and the run button and the run button independently control the metering pump.

[0006] By adopting the above technical solution, during the production process, since the signal sent by the control offline is also the operation signal 0, by setting the operation signal 0 as the operation signal of the metering pump, when there is a control offline problem such as a network cable failure, the equipment will not shut down, thereby reducing the probability of the metering pump suddenly shutting down due to the control offline problem during operation. At the same time, by setting an independently controlled emergency stop button, that is, during use, the equipment can still be controlled to stop suddenly through the emergency stop button.

[0007] In a preferred example, the present application can be further configured as follows: it also includes a relay step, the relay device is connected to the console via a cable, and the relay device is connected to the metering pump via a network cable.

[0008] By adopting the above technical solution, the relay device is connected via a cable, and the relay device is connected to the metering pump via a network cable, thereby making the signal from the control device to the relay device more stable.

[0009] In a preferred example, the present application can be further configured as follows: it also includes a calibration step, where the metering pump periodically obtains the working status of other metering pumps in the working sequence. If the status of other metering pumps is inconsistent with the status of this metering pump, the status of this metering pump is adjusted to be consistent with the status of other metering pumps.

[0010] By adopting the above technical solution, during use, the working status of other metering pumps is periodically obtained, so as to adjust its own working status, thereby achieving better consistency.

[0011] In a preferred example, the present application can be further configured as follows: in the calibration step, each metering pump is calibrated in sequence and there is an interval between the calibration cycles.

[0012] By adopting the above technical solution, each metering pump is calibrated independently, thereby making the calibration more stable.

[0013] In a preferred example, the present application can be further configured as follows: it also includes a pre-shutdown step. When shutdown is required, a pre-operation signal 1 is sent to the metering pump. If there is a metering pump that is performing a calibration step, the metering pump abandons the calibration step and obtains whether other metering pumps in the working sequence have received the pre-operation signal 1. If there is a metering pump that has not received the pre-operation signal 1, the pre-operation signal 1 is modified to an execution signal, and the shutdown time of the execution signal is later than the shutdown time of the pre-operation signal 1.

[0014] By adopting the above technical solution, in production, when there is a metering pump that is performing a calibration step, the calibration step of the metering pump is canceled. When there is a metering pump that has not received the pre-operation signal 1, the downtime is postponed by modifying the pre-operation signal 1 to an execution signal.

[0015] In a preferred example, the present application can be further configured as follows: in the shutdown step, when the metering pump without an execution signal is executing the calibration step, if it is found that other metering pumps have execution signals, then the metering pumps are calibrated to have execution signals.

[0016] By adopting the above technical solution, when a metering pump that has not received an execution signal is executing a calibration step, it will be calibrated as if it has received an execution signal, thereby achieving the purpose of synchronous shutdown.

[0017] In a preferred example, the present application can be further configured as follows: if there is no metering pump that is performing the calibration step, the first metering pump in the working sequence obtains whether other metering pumps in the working sequence have received the pre-operation signal 1 and inquires whether there is a metering pump that is performing the calibration step; if there is a metering pump that is performing the calibration step, if the number of metering pumps that have not received the pre-operation signal 1 is 1 and it is the metering pump that is performing the calibration step, after the calibration step is performed, obtain whether the metering pump is calibrated to receive the pre-operation signal 1; if not calibrated, modify the pre-operation signal 1 to an execution signal.

[0018] By adopting the above technical solution, that is, when there is no metering pump that is performing the calibration step, the first metering pump in the working sequence obtains whether other metering pumps have received the pre-operation signal 1 and obtains whether there is a metering pump that is performing the calibration step. If the number of metering pumps that have not received the pre-operation signal 1 is 1 and they are the metering pumps that are performing the calibration step, after the calibration is completed, if the metering pump is calibrated to receive the pre-operation signal 1, it will be shut down according to the pre-operation signal 1; if it is not calibrated to receive the pre-operation signal 1, the pre-operation signal 1 will be modified to an execution signal. DETAILED DESCRIPTION

[0019] The present application discloses a metering pump control method, comprising the following steps: a control step, wherein the run button is in a normally open state and sends a run signal 0; after the run button is pressed, the run signal 1 is sent, and the run signal 0 is set as the run signal of the metering pump, and the run signal 1 is set as the stop signal of the metering pump; an emergency stop step, wherein after the emergency stop button is pressed, the emergency stop signal 0 is sent, and the emergency stop signal 0 is set as the emergency stop signal of the metering pump, and the run button and the metering pump are independently controlled. A relay step is also included, wherein the relay device is connected to the control console via a cable, and the relay device is connected to the metering pump via a network cable. The metering pumps can also communicate with each other and are independent of the relay device.

[0020] It also includes a calibration step, in which each metering pump is calibrated in turn and there is an interval between the calibration cycles. The metering pump periodically obtains the working status of other metering pumps in the working sequence. If the status of other metering pumps is inconsistent with the status of this metering pump, the status of this metering pump is adjusted to be consistent with the status of other metering pumps.

[0021] The system further includes a pre-shutdown step, wherein when a shutdown is required, a pre-operation signal 1 is sent to the metering pump. If there is a metering pump that is performing a calibration step, the metering pump abandons the calibration step, and obtains information on whether other metering pumps in the working sequence have received the pre-operation signal 1. If there is a metering pump that has not received the pre-operation signal 1, the pre-operation signal 1 is modified to an execution signal, and the shutdown time of the execution signal is later than the shutdown time of the pre-operation signal 1.

[0022] If there is no metering pump that is performing the calibration step, the first metering pump in the working sequence obtains whether other metering pumps in the working sequence have received the pre-operation signal 1 and inquires whether there is a metering pump that is performing the calibration step. If there is a metering pump that is performing the calibration step, if the number of metering pumps that have not received the pre-operation signal 1 is 1 and it is the metering pump that is performing the calibration step, after the calibration step is performed, it is obtained whether the metering pump is calibrated to receive the pre-operation signal 1. If not calibrated, the pre-operation signal 1 is modified to an execution signal.

[0023] In the shutdown step, when the metering pump without execution signal is executing the calibration step, if it is found that other metering pumps have execution signals, the calibration will be performed as if there are execution signals.

[0024] For example, there are currently 10 metering pumps, numbered 1-10, and numbers 2-8 in the working sequence. When performing the calibration step, metering pumps 2-8 perform the calibration step in sequence. After sending pre-operation signal 1 (e.g., shutdown at 5:00) to metering pumps, if there is no fault (i.e., the metering pump performing the calibration step or the first metering pump in the working sequence receives pre-operation signal 1 for all metering pumps), the calibration step is performed according to pre-operation signal 1. If there is a fault (i.e., a metering pump does not receive pre-operation signal 1), such as metering pumps 7 and 8 do not receive pre-operation signal 1, metering pump 5 is assumed to be performing the calibration step. At this time, metering pump 5 receives that metering pumps 7 and 8 have not received pre-operation signal 1. 5 changes pre-operation signal 1 to an execution signal (e.g., shutdown at 5:15). When other metering pumps perform the calibration step, they query the existence of the execution signal (i.e., metering pump 5 has the execution signal) and calibrate themselves to the existence of the execution signal. If there is no metering pump performing the calibration step, it is assumed that metering pump 7 did not receive pre-operation signal 1 due to communication interruption and is about to or currently performing the calibration step.

[0025] At this time, No. 2 obtains whether other metering pumps in the working sequence have received the pre-operation signal 1 and inquires that there is a metering pump that is performing the calibration step and there is only one (No. 7). After the calibration step No. 7 is executed, No. 2 obtains whether the metering pump is calibrated to receive the pre-operation signal 1. If not, No. 2 modifies the pre-operation signal 1 to the execution signal.

[0026] The implementation principle of this embodiment is: during the production process, since the signal sent by the control offline is also the operation signal 0, by setting the operation signal 0 as the operation signal of the metering pump, when there is a control offline problem such as a network cable failure, the equipment will not shut down, thereby reducing the probability of the metering pump suddenly shutting down due to the control offline problem during operation. At the same time, by setting an independently controlled emergency stop button, that is, during use, the equipment can still be controlled to stop suddenly through the emergency stop button.

[0027] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A metering pump control method, characterized in that: The method comprises the following steps: a control step, in which the run button is in a normally open state and a run signal 0 is sent; after the run button is pressed, a run signal 1 is sent, and the run signal 0 is set as the run signal of the metering pump, and the run signal 1 is set as the stop signal of the metering pump; an emergency stop step, in which the emergency stop button is pressed and an emergency stop signal 0 is sent, and the emergency stop signal 0 is set as the emergency stop signal of the metering pump, and the run button and the metering pump are independently controlled; a calibration step is also included, in which the metering pump periodically obtains the working status of other metering pumps in the working sequence, and if the status of other metering pumps is inconsistent with the status of the metering pump, the status of the metering pump is adjusted to be consistent with the status of other metering pumps; in the calibration step, each metering pump is calibrated in turn and there is an interval between the calibration cycles; a pre-stop step is also included, in which a pre-run signal 1 is sent to the metering pump when a shutdown is required, and if there is a metering pump that is executing the calibration step, the metering pump abandons the calibration step, and obtains whether other metering pumps in the working sequence have received the pre-run signal 1. If there is a metering pump that has not received the pre-run signal 1, the pre-run signal 1 is modified to an execution signal, and the shutdown time of the execution signal is later than the shutdown time of the pre-run signal 1; If there is no metering pump that is performing the calibration step, the first metering pump in the working sequence obtains whether other metering pumps in the working sequence have received the pre-operation signal 1 and inquires whether there is a metering pump that is performing the calibration step. If there is a metering pump that is performing the calibration step, if the number of metering pumps that have not received the pre-operation signal 1 is 1 and it is the metering pump that is performing the calibration step, after the calibration step is performed, it is obtained whether the metering pump is calibrated to receive the pre-operation signal 1. If not calibrated, the pre-operation signal 1 is modified to an execution signal.

2. A metering pump control method according to claim 1, characterized in that: The method also includes a relay step, in which the relay device is connected to the console via a cable, and the relay device is connected to the metering pump via a network cable.

3. A metering pump control method according to claim 1, characterized in that: During the shutdown step, when the metering pump without an execution signal is performing the calibration step, if it is found that other metering pumps have execution signals, the calibration will be performed as if there are execution signals.