CN-121974093-A - Anti-blocking control method and system for screw conveying device and screw conveying device

CN121974093ACN 121974093 ACN121974093 ACN 121974093ACN-121974093-A

Abstract

The application provides an anti-blocking control method and system for a screw conveying device and the screw conveying device, and belongs to the technical field of conveying equipment. The method comprises the steps of obtaining real-time current data of a screw motor of the screw conveying device, determining the real-time filling rate of materials in the screw conveying device according to the real-time current data based on a quantitative relation between the preset filling rate and the current value of the screw motor, comparing the real-time filling rate with a preset anti-blocking threshold value, judging that blocking risks exist under the condition that the real-time filling rate is larger than or equal to the preset anti-blocking threshold value, and executing accelerating operation, wherein the accelerating operation comprises the step of sending an instruction to a variable frequency driving module to increase the rotating speed of the screw motor. The active anti-blocking effect of the screw conveying device is achieved, the risk of manual disassembly and blocking removal is reduced, and the continuous operation of the whole system is guaranteed.

Inventors

WU SHIDE
WANG WENMING
Zhang Xiuxiao
WU JIANG

Assignees

中国石油大学(北京)

Dates

Publication Date: 20260505
Application Date: 20260309

Claims (10)

1. An anti-blocking control method for a screw conveyor, characterized by comprising the steps of: Acquiring real-time current data of a screw motor of the screw conveying device; Determining the real-time filling rate of the materials in the screw conveying device according to the real-time current data based on a quantitative relation between a preset filling rate and a screw motor current value; Comparing the real-time filling rate with a preset anti-blocking threshold; and under the condition that the real-time filling rate is greater than or equal to the preset anti-blocking threshold value, judging that the blocking risk exists, and executing the speed-increasing operation, wherein the speed-increasing operation comprises the step of sending an instruction to a variable frequency driving module so as to increase the rotating speed of the spiral motor.
2. The anti-blocking control method for a screw conveyor according to claim 1, wherein the variable frequency drive module includes a frequency converter, and wherein determining that there is a risk of blocking and performing a speed-up operation in a case where the real-time filling rate is greater than or equal to the preset anti-blocking threshold value includes: judging that the screw conveying device has a first-stage blocking risk under the condition that the real-time filling rate is longer than or equal to the preset anti-blocking threshold value in a first preset time period continuously, and sending an instruction to the frequency converter; and controlling the spiral motor to perform linear speed-up operation at a preset speed by using the frequency converter, and monitoring the change of the real-time filling rate after the speed-up operation.
3. The blocking prevention control method for a screw conveyor according to claim 2, characterized in that the blocking prevention control method further comprises: After the frequency converter is used for controlling the spiral motor to perform linear speed-up operation at a preset speed, under the condition that the real-time filling rate monitored again is still larger than the preset anti-blocking threshold value, judging that the spiral conveying device has a secondary blocking risk, controlling the spiral motor to reversely rotate for preset turns, and controlling the spiral motor to perform linear speed-up operation at the preset speed again.
4. The blocking prevention control method for a screw conveyor according to claim 1, characterized in that the blocking prevention control method further comprises: and under the condition that the real-time filling rate is lower than a preset energy-saving threshold value, reducing the rotating speed of the spiral motor to a first preset energy-saving rotating speed by utilizing a frequency converter.
5. The blocking prevention control method for a screw conveyor according to claim 4, further comprising: After the rotating speed of the spiral motor is reduced to a preset energy-saving rotating speed by using the frequency converter, acquiring real-time current data of the spiral motor again; Determining the real-time filling rate of the materials in the spiral conveying device again based on the real-time current data and the quantitative relation; And under the condition that the real-time filling rate is continuously lower than a preset energy-saving threshold value for a second preset time period, reducing the rotating speed of the spiral motor to a second preset energy-saving rotating speed by utilizing the frequency converter, wherein the second preset energy-saving rotating speed is smaller than the first preset energy-saving rotating speed.
6. The blocking prevention control method for a screw conveyor according to claim 1, characterized in that the blocking prevention control method further comprises: And under the condition that the real-time current data is suddenly increased and exceeds a preset emergency current threshold value, judging that the screw conveying device has three-stage blockage risk, and cutting off the power supply of the screw conveying device.
7. The blocking prevention control method for a screw conveyor according to claim 1, characterized in that the blocking prevention control method further comprises: before the real-time current data of the screw motor of the screw conveying device are obtained, obtaining a plurality of sample filling rate data and corresponding sample current data of the screw motor when the screw conveying device conveys sample materials; And drawing a calibration curve based on the sample filling rate data and the sample current data to obtain a quantitative relation between the filling rate and the screw motor current value.
8. The anti-blocking control method for a screw conveyor according to any one of claims 1 to 7, wherein the screw conveyor is an offshore drilling platform cuttings conveyor.
9. An anti-blocking control system for a screw conveyor, comprising: the sensor acquisition module is used for acquiring real-time current data of a screw motor of the screw conveying device; The controller module is used for determining the real-time filling rate of the materials in the spiral conveying device according to the real-time current data based on a quantitative relation between the preset filling rate and the current value of the spiral motor; and the variable frequency driving module is used for judging that the blockage risk exists and executing the speed-increasing operation under the condition that the real-time filling rate is larger than or equal to a preset anti-blockage threshold value.
10. A screw conveyor comprising the anti-blocking control system for a screw conveyor of claim 9.

Description

Anti-blocking control method and system for screw conveying device and screw conveying device Technical Field The application relates to the technical field of conveying equipment, in particular to an anti-blocking control method and system for a screw conveying device and the screw conveying device. Background The offshore drilling platform can continuously generate a large amount of drilling cuttings with high viscosity and large fluctuation of conveying capacity in the oil and gas exploitation process, and the drilling cuttings need to be transported to a recovery processing system through long-distance conveying equipment. The screw conveying device is a core device for conveying drill cuttings due to the stability advantage of strong structural tightness and adaptation to the offshore high-humidity high-salt environment. However, when the conveying amount of drill cuttings suddenly increases, the spiral conveying device is easy to generate a blocking phenomenon, the drill cuttings are accumulated to enable the filling rate to be increased, the torque of the spiral blades is increased, the conveying speed of materials is reduced, accidents caused by blocking are further caused, overload damage to the spiral motor can be caused, and the spiral conveying device needs to be shut down for manual cleaning. The existing anti-blocking method of the spiral conveying equipment mainly takes passive fault alarm as a main part, and lacks the capability of active blocking clearing and adjusting. Disclosure of Invention The embodiment of the application aims to provide an anti-blocking control method and system for a screw conveying device and the screw conveying device. In order to achieve the above object, a first aspect of the present application provides an anti-blocking control method for a screw conveyor, comprising: Acquiring real-time current data of a screw motor of the screw conveying device; Determining the real-time filling rate of materials in the screw conveying device according to real-time current data based on a quantitative relation between a preset filling rate and a screw motor current value; Comparing the real-time filling rate with a preset anti-blocking threshold value; and under the condition that the real-time filling rate is greater than or equal to a preset anti-blocking threshold value, judging that blocking risks exist, and executing a speed-up operation, wherein the speed-up operation comprises the step of sending an instruction to the variable frequency driving module so as to increase the rotating speed of the spiral motor. In the embodiment of the application, the variable frequency driving module comprises a frequency converter, and under the condition that the real-time filling rate is greater than or equal to a preset anti-blocking threshold value, the blocking risk is judged to exist, and the speed increasing operation is carried out, wherein under the condition that the real-time filling rate is continuously greater than or equal to the preset anti-blocking threshold value for a first preset time period, the first-stage blocking risk of the spiral conveying device is judged, and an instruction is sent to the frequency converter, the frequency converter is used for controlling the spiral motor to carry out linear speed increasing operation at a preset speed, and the change of the real-time filling rate is monitored after the speed increasing operation. In the embodiment of the application, the anti-blocking control method further comprises the steps of judging that the secondary blocking risk exists in the spiral conveying device under the condition that the real-time filling rate monitored again is still larger than the preset anti-blocking threshold value after the frequency converter is used for controlling the spiral motor to perform linear speed-up operation at the preset speed, controlling the spiral motor to reversely rotate for preset turns, and controlling the spiral motor to perform linear speed-up operation at the preset speed again. In the embodiment of the application, the anti-blocking control method further comprises the step of reducing the rotating speed of the spiral motor to a first preset energy-saving rotating speed by utilizing the frequency converter under the condition that the real-time filling rate is lower than the preset energy-saving threshold value. The anti-blocking control method further comprises the steps of obtaining real-time current data of the spiral motor again after the rotating speed of the spiral motor is reduced to a preset energy-saving rotating speed by the aid of the frequency converter, determining real-time filling rate of materials in the spiral conveying device again based on the real-time current data and the quantitative relation, and reducing the rotating speed of the spiral motor to a second preset energy-saving rotating speed by the aid of the frequency converter when the real-time filling rate is continuously lower than a pre