CN-122014684-A - Sealing compensation and intelligent cooling system of zero-leakage chemical process pump

CN122014684ACN 122014684 ACN122014684 ACN 122014684ACN-122014684-A

Abstract

The invention discloses a sealing compensation and intelligent cooling system of a zero-leakage chemical process pump, which particularly relates to the technical field of chemical process pumps, and comprises a chemical process pump system starting module, an intelligent control module, a temperature detection and liquid speed control module, a temperature monitoring and judging module, a continuous monitoring and dynamic adjusting module, a temperature abnormality judging link, a shutdown preparation module, a temperature monitoring and shutdown confirmation module and a system closing module, wherein the temperature monitoring and judging module is arranged before transmitting a monitoring result to the continuous monitoring and dynamic adjusting module, the system adopts a cooling adjustment algorithm based on a fuzzy PID control principle, and can adjust the flow speed of cooling liquid in real time according to the actual temperature change of a pump body.

Inventors

MEI YITAO
ZHOU YUANJUN
CHENG ZHIQIANG
ZHANG XIAO
WANG WEILONG
MEI JIANFENG
FENG QI
HE JIANJUN

Assignees

安徽卧龙泵阀股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260325

Claims (6)

1. Sealing compensation and intelligent cooling system of zero leakage chemical process pump, its characterized in that includes: The chemical process pump system starting module is used as a starting core of the whole system and is used for receiving an external starting instruction and initializing each sub-module; The intelligent control module receives a starting signal from the starting module of the chemical process pump system, is used as a control center of the system and is responsible for receiving and processing data and instructions from each sub-module; The temperature detection and liquid speed control module responds to the connection request after the intelligent control module establishes a communication link, and is connected with the intelligent control module, and is used for detecting the temperature and the flow speed of the cooling liquid in real time and adjusting the flow speed of the cooling liquid according to the requirement; The temperature monitoring and judging module is used for receiving temperature data from the temperature detection and liquid speed control module, communicating with the intelligent control module, continuously monitoring the temperature of each part of the pump body, and comparing and judging with a preset threshold value; the continuous monitoring and dynamic adjusting module is used for receiving the monitoring result from the temperature monitoring and judging module and an adjusting instruction of the intelligent control module, continuously monitoring the system state and performing dynamic adjustment; The intelligent control module receives the monitoring result of the temperature monitoring and judging module, and continuously maintains the current running state when judging that the temperatures of all parts of the pump body are normal and do not exceed a preset threshold value; when judging that the temperature of a certain part of the pump body exceeds a preset threshold value, the intelligent control module sends an instruction to the temperature detection and liquid speed control module, starts a cooling adjustment flow, adjusts the flow speed of cooling liquid to reduce the temperature, and simultaneously sends a corresponding instruction according to a preset sealing compensation strategy to carry out sealing compensation operation; the shutdown preparation module is used for receiving a shutdown instruction from the intelligent control module and carrying out preparation work before shutdown when receiving the shutdown instruction; The temperature monitoring and stopping confirmation module is used for receiving the signals and the temperature detection data from the stopping preparation module and communicating with the intelligent control module at the same time, and is used for continuously monitoring the temperature of the pump body in the stopping process and confirming whether the stopping condition is met or not; And the system closing module is used for receiving the shutdown completion signal from the temperature monitoring and shutdown confirmation module, communicating with the intelligent control module and being used as a final closing stage of the system and responsible for completing all operation records and data processing work.
2. The system for sealing compensation and intelligent cooling of a zero leakage chemical process pump of claim 1, wherein the intelligent control module calculates a desired flow rate adjustment by combining a current cooling liquid flow rate and a temperature deviation according to a preset cooling adjustment algorithm, and adjusts PID parameters in real time by a fuzzy PID controller, wherein the PID parameters include a proportionality coefficient Integral coefficient Differential coefficient ; The calculation formula for adjusting PID parameters by the fuzzy PID controller is as follows: Wherein, the 、、 For the initial set PID parameters, it can be adjusted empirically and experimentally, e.g., set to 0.08, 0.005, 0.40, respectively, delta 、Δ 、Δ For the output of fuzzy control, the values of three control parameters of PID are automatically adjusted according to the state of the controlled object; 、、 And the dynamic correction value of the PID parameter is adjusted by the PID controller to improve the control performance of the system under different working conditions.
3. The system for sealing compensation and intelligent cooling of a zero-leakage chemical process pump of claim 1, wherein the intelligent control module sends a command to the temperature detection and liquid speed control module according to the calculated flow speed adjustment amount for adjusting the flow speed of the cooling liquid, and the temperature detection and liquid speed control module responds to the command for controlling the flow speed of the cooling liquid.
4. The sealing compensation and intelligent cooling system of the zero-leakage chemical process pump of claim 1, wherein the sealing compensation device detects the sealing gap G of the overtemperature part in real time through a displacement sensor to obtain a specific value of the current sealing gap, and determines the required sealing compensation amount delta G according to a preset sealing compensation parameter table by combining the current sealing gap value G and temperature data T, and the sealing compensation parameter table is assumed to be a simple linear relation table, wherein the relation between the sealing compensation amount delta G and the temperature T and the sealing gap G can be expressed as follows: ΔG=a·T+b·G+c; Wherein a, b and c are constants.
5. The system for sealing compensation and intelligent cooling of a zero-leakage chemical process pump according to claim 1, wherein the sealing compensation executing mechanism is driven according to the determined sealing compensation amount delta G, the sealing compensation executing mechanism comprises a hydraulic cylinder, and the driving force P of the hydraulic cylinder is calculated by the following formula: P= wherein F is the required driving force, A is the effective acting area of the hydraulic cylinder, and the driving force F is calculated according to the sealing compensation amount delta G and the rigidity k of the sealing device: F=k·ΔG。
6. The system for sealing compensation and intelligent cooling of zero-leakage chemical process pump of claim 1, wherein the system is characterized in that the change of the sealing gap is continuously monitored during the sealing compensation strategy process, and the displacement sensor collects the sealing gap data in real time and seals the gap with a target Comparing, target The seal gap may be calculated by the following formula: if the deviation of the monitored seal gap from the target seal gap exceeds the allowable range delta Adjusting driving parameters of the actuator, e.g. driving pressure of the hydraulic cylinder, until the sealing gap is adjusted to a proper range The amount of compensation is sealed for the target.

Description

Sealing compensation and intelligent cooling system of zero-leakage chemical process pump Technical Field The invention relates to the technical field of chemical process pumps, in particular to a sealing compensation and intelligent cooling system of a zero-leakage chemical process pump. Background In the chemical production process, the operation stability of the chemical process pump is directly related to the safety and efficiency of the whole production process, however, the temperature of each part of the pump body can be gradually increased due to the influence of factors such as friction, compression and external environment of the medium in the pump body in the operation process of the chemical process pump. The excessively high temperature not only can cause ageing and deformation of the sealing element and further cause sealing failure, so that chemical medium leakage is caused, the environment is polluted and potential safety hazards are brought, but also can influence the performance and service life of the pump, and the equipment maintenance cost and the downtime are increased. The traditional cooling system of the chemical process pump mostly adopts a cooling mode with fixed flow, cannot dynamically adjust the flow of cooling liquid according to the actual temperature change of the pump body, so that the cooling effect is poor, the energy waste is serious, meanwhile, in the aspect of sealing, an effective real-time monitoring and dynamic compensation mechanism is lacking, the change of a sealing gap caused by the temperature rise is difficult to cope with, and the zero leakage operation of the pump cannot be ensured. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides a sealing compensation and intelligent cooling system of a zero-leakage chemical process pump, so as to solve the problems in the prior art. In order to achieve the purpose, the invention provides the following technical scheme that the sealing compensation and intelligent cooling system of the zero-leakage chemical process pump comprises the following components: The chemical process pump system starting module is used as a starting core of the whole system and is used for receiving an external starting instruction and initializing each sub-module; The intelligent control module receives a starting signal from the starting module of the chemical process pump system, is used as a control center of the system and is responsible for receiving and processing data and instructions from each sub-module; The temperature detection and liquid speed control module responds to the connection request after the intelligent control module establishes a communication link, and is connected with the intelligent control module, and is used for detecting the temperature and the flow speed of the cooling liquid in real time and adjusting the flow speed of the cooling liquid according to the requirement; The temperature monitoring and judging module is used for receiving temperature data from the temperature detection and liquid speed control module, communicating with the intelligent control module, continuously monitoring the temperature of each part of the pump body, and comparing and judging with a preset threshold value; the continuous monitoring and dynamic adjusting module is used for receiving the monitoring result from the temperature monitoring and judging module and an adjusting instruction of the intelligent control module, continuously monitoring the system state and performing dynamic adjustment; The intelligent control module receives the monitoring result of the temperature monitoring and judging module, and continuously maintains the current running state when judging that the temperatures of all parts of the pump body are normal and do not exceed a preset threshold value; when judging that the temperature of a certain part of the pump body exceeds a preset threshold value, the intelligent control module sends an instruction to the temperature detection and liquid speed control module, starts a cooling adjustment flow, adjusts the flow speed of cooling liquid to reduce the temperature, and simultaneously sends a corresponding instruction according to a preset sealing compensation strategy to carry out sealing compensation operation; the shutdown preparation module is used for receiving a shutdown instruction from the intelligent control module and carrying out preparation work before shutdown when receiving the shutdown instruction; The temperature monitoring and stopping confirmation module is used for receiving the signals and the temperature detection data from the stopping preparation module and communicating with the intelligent control module at the same time, and is used for continuously monitoring the temperature of the pump body in the stopping process and confirming whether the stopping condition is met or not; And the system closing module is used for receiving the shutdown