阅读说明：本技术 一种基于集中供热管网水力平衡调节和数据应用实验装置 (Experimental device for hydraulic balance adjustment and data application based on centralized heat supply pipe network ) 是由 陈奕 杨绍军 王雪松 于 2019-10-28 设计创作，主要内容包括：本发明为一种基于集中供热管网调节方法和数据采集应用实验装置。简称“装置”。通过该装置研发的方法。实现供热管网按需精确供热。实施方法：1.通过装置研发新的平衡方式,并在热力管网中推广；2.通过装置中设备压差和流量值的变化值,判断热力管网中各种系统故障；3.通过对装置中压差和流量控制方式,实现供热管网按需精确供热。4.利用装置模拟现实中各种水力工况。给出供热管网设计和整改方案。装置包括：水力平衡、压差、流量控制和自控。所有设备运行数据实时上传,通过数据变化,判断故障点；自控系统能够让压差和流量自动调节,实现装置内流量精确控制。为热力管网按需供热,提供真实数据和理论依据。(The invention relates to a centralized heat supply pipe network adjusting method and a data acquisition application experimental device. Referred to as "device" for short. A method developed by the apparatus. Realize the accurate heat supply of heat supply pipe network as required. The implementation method comprises the following steps: 1. a new balance mode is developed through the device and popularized in a heat distribution pipe network; 2. judging various system faults in the heat distribution pipe network according to the change values of the equipment pressure difference and the flow value in the device; 3. the heat supply pipe network can accurately supply heat according to the requirement by a medium pressure difference and flow control mode of the device. 4. Various hydraulic working conditions in reality are simulated by utilizing the device. And providing a heat supply pipe network design and reforming scheme. The device comprises: hydraulic balance, pressure difference, flow control and automatic control. Uploading operation data of all equipment in real time, and judging fault points through data change; the automatic control system can automatically adjust the pressure difference and the flow, and realize the accurate control of the flow in the device. And real data and theoretical basis are provided for heating of a heating pipe network according to needs.)

1. The utility model provides a based on central heating pipe network hydraulic balance adjusts and data application experimental apparatus which characterized in that:

the flow of other loops is proportionally adjusted by acquiring and referring the flow and pressure values of the worst loop in the experimental device system and utilizing balance valve equipment, so that the rapid hydraulic balance of the experimental device system is achieved;

according to the experimental device system, whether the pipeline is blocked, whether the pipeline is correctly installed and other various faults simulated by the experimental device system exist or not is judged through the change of the collected closing pressure difference data and flow data of the static balance valve;

the flow rate is accurately controlled by controlling the pressure difference and the flow rate in the experimental device system through electric control valves, pressure difference controllers and other equipment. Various working condition requirements and adjusting means in the accurate adjustment of the simulated reality heat supply pipe network according to needs.

Background monitoring and data analysis, this experimental apparatus system can gather various parameter values of this experimental apparatus system normal hydraulic motion to and relevant change, guide pressure differential control and flow control to carry out automatically regulated, satisfy this experimental apparatus system to the accurate control of flow to the accurate heat supply as required in the simulation actual heat supply pipe network.

Through this experimental apparatus, various water conservancy operating mode conditions are simulated, such as the velocity of flow, the data change of pipeline specific friction resistance obtains in the heat supply pipe network, mutual interference and the characteristic of mutual compatibility between each system's return circuit.

2. The method for adjusting the hydraulic balance of a heat distribution pipe network according to claim 1, wherein the method comprises the following steps:

and (3) referring to the flow of the worst loop in the heat supply pipe network, taking the flow required by the worst loop as an adjusting target, and adjusting the flow of other loops in the pipe network to enable the flow of all loops to reach a pre-designed proportional relation. When the flow changes in this experimental apparatus system, can guarantee that each return circuit that adjusts all changes according to the proportion of predesign, eliminate this experimental apparatus system flow distribution inequality and "near-end overflows, the hydraulic imbalance phenomenon of terminal undercurrent" fast to reach the quick hydraulic balance of this experimental apparatus system.

3. According to claim 1, the experimental device system fault diagnosis is characterized in that:

this experimental apparatus system realizes comprehensive hydraulic balance back, and the change of relevant pressure and pressure differential in this experimental apparatus system can be gathered to the static balance valve, and in this experimental apparatus system, a certain or several return circuits set up the pipeline resistance point through the manual work, and the pipeline resistance will change. Differential valve closing pressure in the circuit andflow rateThe differential pressure value can also change correspondingly, and relevant data such as pressure, flow and the like can be acquired through the static balance valve in the changes, so that the interval in which some problem loops are blocked can be rapidly judged. Through resistance simulation of different states and acquired experimental data, the pipeline resistance is gradually found and judgedVarious pipe characteristics after force changes. Therefore, the method is adopted to guide the production operation and maintenance of heat supply and improve the working efficiency.

4. The precise adjustment method and apparatus according to claim 1, wherein:

differential pressure control group and flow control group, through gathering this experimental apparatus system, pressure difference and flow data during operation, with this experimental apparatus backstage monitored control system of uploading data, this experimental apparatus backstage monitored control system, through analyzing this experimental apparatus system, the change of each parameter, such as flow, pressure difference, the relevant equipment of automatically regulated pressure difference control group and flow control group, guarantee in this experimental apparatus system, simulate the heat supply unit in some heat supply district, according to the demand for heat oneself, when autonomy adjusts, can not cause the influence to the demand for heat supply of other heat consumer heat supply units, thereby reach the demand-based accurate regulation of heat.

5. The background monitoring system of the experimental facility according to claim 1, characterized in that:

the background monitoring system of the experimental device adopts an automatic control product as a main control device, completes real-time acquisition and real-time regulation and control of data of devices such as a flow sensor, a pressure sensor, an electric regulating valve, a heating circulating pump and the like in the experimental device system, and can display and locally store the data and a processing result in real time.

Technical Field

The invention relates to the related technical field of hydraulic balance and automatic control of a central heating pipe network, in particular to a hydraulic balance debugging method, a pressure difference control method, a flow control method and the like of the central heating pipe network.

Background

Currently, China is highly promoting to use new generation information technologies such as internet +', internet of things, big data, artificial intelligence and the like from national strategies to enable transformation and upgrading of various industries, and intelligence is generally a keyword for describing transformation and upgrading characteristics. Currently, the concept of "intelligent heating" has been put forward formally and has become the focus of attention in the heating industry of China. However, the problem of hydraulic imbalance of the urban centralized heating network still is the biggest pain point in the heating industry, and still is the biggest stumbling stone on the intelligent heating development road.

The invention provides a novel debugging method for quickly realizing the hydraulic balance of a heat supply system and a method for diagnosing the operation fault of the heat supply system and accurately supplying heat according to the requirement based on the application of a static balance valve in the hydraulic balance adjustment of a heat supply pipe network, and invents a set of experimental device to verify and demonstrate the feasibility of the method.

Disclosure of Invention

In view of the above problems, the inventors have invented a set of experimental device for simulating a heat supply pipe network system, and proposed a new debugging method for quickly realizing the hydraulic balance of the heat supply pipe network system, and a method for fault diagnosis and accurate heat supply on demand of the heat supply pipe network system on the experimental device.

According to one aspect of the invention, an experimental device for simulating a heating pipeline network system is provided, which specifically comprises: the device comprises a hydraulic balance adjusting device, a branch resistance adjusting device, a pressure difference control group, a flow acquisition and display device and a background monitoring device. The aforesaid except backstage monitoring device, the equipment in all the other each devices all adopts loose joint to connect, and main pipeline part adopts PPR hot melt pipe, and the pipeline is fixed on the support, constitutes experimental apparatus's hydraulic model part, specifically includes: static balance valve, ball valve, differential pressure control valve, stop valve, manometer, discharge valve, float flowmeter, pulse flowmeter, electrical control valve, pressure sensor etc..

The background monitoring device consists of two sets of automatic (PLC) control modules and is fixed on the independent display rack. And the background monitoring device and the electric regulating valve, the pulse flowmeter and the pressure sensor in the hydraulic model are communicated in a wired mode.

Preferably, in the experimental apparatus, each of the branch resistance adjusting devices uses a copper shut-off valve having a linear resistance characteristic as the adjusting device.

Preferably, the hydraulic elements of the experimental device are connected through loose joint joints, so that later equipment is conveniently added, removed and maintained. Adopt PPR hot melt pipe coupling, effectively prevent that the pipeline from rustting.

Preferably, in the background monitoring system of the experimental device, the cables in wired connection among the pressure sensor, the pulse flow meter, the electric control valve and the PLC control unit are all shielded cables, and reliable grounding at two ends is ensured, so that signals of all acquisition channels in the experimental device system are not interfered with each other, and the experimental effect is not influenced.

According to another aspect of the present invention, there is provided a method for quickly adjusting hydraulic balance in a heat supply pipe network, including: and (3) referring to the flow of the worst loop in the heat supply pipe network, taking the flow required by the worst loop as an adjusting target, and adjusting the flow of other loops in the pipe network to enable the flow of all loops to reach a pre-designed proportional relation. When the flow changes in the experimental device system, each adjusted loop can be guaranteed to change according to the predesigned proportion.

According to another aspect of the invention, a method for diagnosing operation faults of a thermal pipe network system is provided, which specifically comprises the following steps: the heating return circuit of installation static balance valve can gather the change of relevant pressure and pressure differential in the branch road through the debugging instrument, and when certain return circuit took place to block up the condition in this experimental apparatus system, the relevant pressure differential of valve in this return circuit, pressure value can take place obvious change, and these changes all can read through the static balance valve to through the contrast with original data of gathering, thereby the interval that certain return circuit took place to block up is judged out fast.

According to another aspect of the present invention, there is provided a pressure difference control method for a heat supply pipe network to supply heat accurately as required, including: the pressure difference control group comprises pressure sensors on a water supply pipeline and a water return pipeline in the heating loop and an electric regulating valve arranged on the water supply pipeline. The flow rate required for maintaining normal heating of the building is obtained by calculating the building load. Under the flow, the pressure difference of the water supply and return pipelines is obtained, a corresponding program is written through a background monitoring system, the electric regulating valve is controlled, and the pressure difference is maintained without being influenced by the regulation of other branches.

According to another aspect of the present invention, there is provided a flow control method for heat supply pipe network, which includes: the flow control group is including installing pulse flowmeter and the electrical control valve on the heating return circuit, this experimental apparatus system of background control, through the pulse flowmeter reading of real-time collection, control electrical control valve, maintains the invariant of branch road flow. When the building load changes, the required flow changes, and the flow control group automatically adjusts.

According to another aspect of the present invention, a background monitoring system based on a heat supply pipe network is provided, which specifically includes: the control unit is used as a main control device to complete real-time acquisition and real-time regulation and control of data of devices such as a flow sensor, a pressure sensor, an electric regulating valve, a heating circulating pump and the like in the experimental device system, and can display and locally store the data and processing results in real time.

The foregoing description is only an overview of the technical solutions of the present invention, and the following detailed description of the present invention is given to enable the technical means of the present invention to be more clearly understood, and to enable the above and other objects, features, and advantages of the present invention to be more clearly understood.

Drawings

Fig. 1 is a plan design view of an experimental device of a set of simulated heat supply pipe network experimental device system according to the present invention.

Fig. 2 is a 3D effect diagram of an experimental device of the simulated heat supply pipe network experimental device system according to the present invention.

Fig. 3 is an electrical schematic diagram of the background monitoring experimental apparatus system according to the present invention.

FIG. 4 is a debugging method for rapidly realizing the hydraulic balance of the experimental device system.

Fig. 5 is a method for diagnosing operation faults of the thermal power pipeline network experimental device system.

Fig. 6 shows a pressure difference control method and a flow control method for realizing accurate heat supply on demand of a user according to the invention.

Detailed Description

The invention is explained in more detail below with reference to the figures and examples, without limiting the scope of the invention.