Heat supply network load monitoring system

Abstract

The embodiment of the utility model provides a heat supply network load monitoring system which comprises a water supply main pipe, a water return main pipe, a primary network, a secondary network and a heat exchanger. A water supply port of the primary net is communicated with the water supply main pipe, and a water return port of the primary net is communicated with the water return main pipe; a first pressure sensor is arranged on the primary net, and the first pressure sensor is used for detecting the pressure in the primary net; a water supply port and a water return port of the secondary network are respectively connected to a user side; wherein the primary net and the secondary net are respectively communicated with the heat exchanger; and the heat exchanger is used for exchanging the water supply heat of the primary network to the water supply of the secondary network so as to be used by a user side. According to the method and the device, the first pressure sensor is arranged on the primary network, so that the pressure in the primary network can be effectively monitored, reference data can be provided for the heat supply amount of the heat supply network system, and the heat supply amount of the heat supply network system can be timely adjusted according to weather and air temperature changes.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure belong to the technical field of heat supply, and particularly relate to a heat network load monitoring system. BACKGROUND

[0002] Central heating refers to a way that steam and hot water generated by a central heat source are supplied to a city (town) or a partial area for production, heating and living. Central heating is one of the infrastructures of modern cities and an important facility of urban public utilities. Central heating not only provides stable and reliable high-grade heat sources for cities, improves people's lives, but also saves energy, reduces urban pollution, beautifies cities and effectively utilizes urban space. Therefore, central heating has significant economic and social benefits.

[0003] In the process of urban development, building energy-saving indicators are different in different years, and the water supply flow needs to be adjusted in real time according to temperature changes. This process requires a large amount of human resources and complex operation. In general, heating enterprises avoid misoperation and large human cost by maintaining stable flow during the heating process. However, this operation method often causes large heating capacity at the beginning and end of the operation, and insufficient heating capacity in extremely cold weather, which is not adjusted in time. This operation method not only causes a large amount of resource waste, but also seriously affects the comfort of users.

[0004] However, the current heat network system lacks effective pressure, flow and temperature monitoring measures. Therefore, how to solve the above technical problems has become a technical problem to be solved by the technical personnel in the field. CONTENT OF THE INVENTION

[0005] Embodiments of the present disclosure aim to at least solve one of the technical problems existing in the prior art, and provide a heat network load monitoring system.

[0006] In one aspect of the embodiments of the present disclosure, a heat network load monitoring system is provided, comprising: a water supply main pipe, a return water main pipe, a primary network, a secondary network and a heat exchanger;

[0007] The water supply port of the primary network is in communication with the water supply main pipe, and the return water port of the primary network is in communication with the return water main pipe. A first pressure sensor is arranged on the primary network, and the first pressure sensor is used to detect the pressure in the primary network.

[0008] The water supply port and the return water port of the secondary network are respectively connected to a user end.

[0009] The primary network and the secondary network are respectively in communication with the heat exchanger. The heat exchanger is used to exchange the heat of the water supply of the primary network to the water supply of the secondary network for use by the user end.

[0010] Optionally, the primary network comprises a primary water supply pipe and a primary water return pipe; a water supply opening of the primary water supply pipe is in communication with the water supply main pipe, and a water outlet opening of the primary water supply pipe is in communication with a water inlet opening of the hot end of the heat exchanger;

[0011] a water inlet opening of the primary water return pipe is in communication with a water outlet opening of the hot end of the heat exchanger, and a water return opening of the primary water return pipe is in communication with the water return main pipe;

[0012] The first pressure sensor is arranged on the primary water supply pipe and is used to detect the pressure in the primary water supply pipe.

[0013] Further, the first temperature sensor is arranged on the primary water supply pipe and is used to detect the temperature in the primary water supply pipe.

[0014] Further, the first flow sensor is arranged on the primary water supply pipe and is used to detect the flow in the primary water supply pipe.

[0015] Further, the first isolation valve, the first regulating valve and the second isolation valve are arranged; the first regulating valve is arranged on the primary water supply pipe; the first isolation valve is arranged upstream of the first regulating valve; and the second isolation valve is arranged downstream of the first regulating valve.

[0016] Further, the third isolation valve, the second flow sensor, the second temperature sensor and the second pressure sensor are arranged.

[0017] The third isolation valve, the second flow sensor, the second temperature sensor and the second pressure sensor are arranged on the primary water return pipe.

[0018] Optionally, the secondary network comprises a secondary water supply pipe and a secondary water return pipe; a water supply opening of the secondary water supply pipe is in communication with the user end, and a water outlet opening of the secondary water supply pipe is in communication with a water inlet opening of the cold end of the heat exchanger;

[0019] a water inlet opening of the secondary water return pipe is in communication with a water outlet opening of the cold end of the heat exchanger, and a water return opening of the secondary water return pipe is in communication with the user end;

[0020] The first circulating pump is arranged on the secondary water supply pipe and is used to pump the user end water supply to the water inlet opening of the cold end of the heat exchanger.

[0021] Further, the fourth isolation valve and the fifth isolation valve are arranged; the fourth isolation valve is arranged on the secondary water supply pipe; and the fifth isolation valve is arranged on the secondary water return pipe.

[0022] Further, the heat supply network load monitoring system further comprises a third pressure sensor, a third temperature sensor and a third flow sensor, and the third pressure sensor, the third temperature sensor and the third flow sensor are arranged on the secondary water supply pipe.

[0023] Further, the heat supply network load monitoring system further comprises a fourth pressure sensor, a fourth temperature sensor and a fourth flow sensor, and the fourth pressure sensor, the fourth temperature sensor and the fourth flow sensor are arranged on the secondary water return pipe.

[0024] The heat supply network load monitoring system has the following beneficial effects,

[0025] In the heat supply network load monitoring system, the first pressure sensor arranged on the primary network can effectively monitor the pressure in the primary network, thereby providing reference data for the heat supply amount of the heat supply network load monitoring system, and further ensuring that the heat supply network load monitoring system can timely adjust the heat supply amount according to the weather and temperature changes. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a structural schematic diagram of a heat supply network load monitoring system according to an embodiment of the present disclosure.

[0027] In the figure, 1 is a water supply main pipe, 2 is a water return main pipe, 3 is a second circulating pump, 4 is a first heat exchanger, 5 is a second heat exchanger, 6 is a third heat exchanger, 7 is a first user end, 8 is a second user end, 9 is a third user end, 10 is a primary network, 20 is a secondary network, 11 is a primary water supply pipe, 12 is a primary water return pipe, 21 is a secondary water supply pipe, 22 is a secondary water return pipe, 101 is a first pressure sensor, 102 is a first temperature sensor, 103 is a first flow sensor, 104 is a first isolation valve, 105 is a first regulating valve, 106 is a second isolation valve, 107 is a third isolation valve, 108 is a second flow sensor, 109 is a second temperature sensor, 110 is a second pressure sensor, 201 is a first circulating pump, 202 is a fourth isolation valve, 203 is a third pressure sensor, 204 is a third temperature sensor, 205 is a third flow sensor, 206 is a fifth isolation valve, 207 is a fourth pressure sensor, 208 is a fourth temperature sensor, and 209 is a fourth flow sensor. DETAILED DESCRIPTION

[0028] In order for those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be further described in detail below in combination with the drawings and specific embodiments.

[0029] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed descriptions and accompanying drawings of the following embodiments are used to exemplarily illustrate the principles of this application, but should not be used to limit the scope of this application; that is, this application is not limited to the described embodiments. In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0030] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0031] like Figure 1 As shown, a heating network load monitoring system includes a supply water header 1, a return water header 2, a primary network 10, a secondary network 20, and a heat exchanger.

[0032] The primary network 10 has its supply port connected to the supply header 1 and its return port connected to the return header 2. A first pressure sensor 101 is installed on the primary network 10 to detect the pressure within it. The secondary network 20 has its supply and return ports connected to the user end. Both the primary network 10 and the secondary network 20 are connected to heat exchangers, which transfer heat from the primary network 10 to the secondary network 20 for user use.

[0033] In this disclosure, by setting a first pressure sensor 101 on the primary network 10, the pressure in the primary network 10 can be effectively monitored, thereby providing reference data for the heating network load monitoring system, and ensuring that the heating network load monitoring system can adjust the heating supply in a timely manner according to weather and temperature changes.

[0034] In some embodiments, the primary network 10 includes a primary water supply pipe 11 and a primary water return pipe 12. The water supply port of the primary water supply pipe 11 is connected to the water supply header 1, and the water outlet of the primary water supply pipe 11 is connected to the water inlet of the hot end of the heat exchanger.

[0035] The water inlet of the primary return water pipe 12 is in communication with the water outlet of the heat exchanger hot end, and the water return outlet of the primary return water pipe 12 is in communication with the water return main pipe 2, wherein the first pressure sensor 101 is arranged on the primary water supply pipe 11 and is used to detect the pressure in the primary water supply pipe 11.

[0036] In the present disclosure, by arranging the first pressure sensor 101 on the primary water supply pipe 11, the pressure in the primary water supply pipe 11 can be monitored in real time, and possible pressure abnormalities can be discovered and handled in a timely manner, thereby improving the stability and reliability of the system.

[0037] By monitoring the pressure of the primary water supply pipe 11, the water supply flow can be better controlled and adjusted, ensuring efficient transmission of heat energy between the primary network 10 and the secondary network 20, and improving the heat energy utilization efficiency of the overall heat network load monitoring system. The data of the pressure sensor can provide important reference for the maintenance and management of the system, help the operator to understand the system operation status in a timely manner, and make necessary adjustments and maintenance to prolong the service life of the equipment.

[0038] In some embodiments, the heat network load monitoring system further comprises a first temperature sensor 102, which is arranged on the primary water supply pipe 11 and is used to detect the temperature in the primary water supply pipe 11.

[0039] In the present disclosure, by arranging the first temperature sensor 102 on the primary water supply pipe 11, the water temperature in the primary water supply pipe 11 can be monitored in real time, thereby more accurately controlling and adjusting the heat energy transmission to ensure efficient operation of the system.

[0040] By monitoring the temperature of the primary water supply pipe 11, the working state of the heat exchanger can be better adjusted to ensure efficient transmission of heat energy between the primary network 10 and the secondary network 20, and improve the heat energy utilization efficiency of the overall heat network load monitoring system.

[0041] In some embodiments, the heat network load monitoring system further comprises a first flow sensor 103, which is arranged on the primary water supply pipe 11 and is used to detect the flow in the primary water supply pipe 11.

[0042] In the present disclosure, by arranging the first flow sensor 103 on the primary water supply pipe 11, the flow of water in the primary water supply pipe 11 can be monitored in real time, thereby more accurately controlling and adjusting the heat energy transmission to ensure efficient operation of the system. By monitoring the flow of the primary water supply pipe 11, the working state of the heat exchanger can be better adjusted to ensure efficient transmission of heat energy between the primary network 10 and the secondary network 20, and improve the heat energy utilization efficiency of the overall heat network load monitoring system.

[0043] In addition, the data of the flow sensor can provide an important reference for the safe operation of the system, and timely discover and handle possible flow abnormal conditions to prevent equipment damage or system failure caused by excessive or insufficient flow.

[0044] In some embodiments, the heat network load monitoring system further comprises a first isolation valve 104, a first regulating valve 105, and a second isolation valve 106. The first regulating valve 105 is arranged in the primary water supply pipe 11, the first isolation valve 104 is arranged upstream of the first regulating valve 105, and the second isolation valve 106 is arranged downstream of the first regulating valve 105.

[0045] In the present disclosure, by arranging the first isolation valve 104, the first regulating valve 105, and the second isolation valve 106, the water flow in the primary water supply pipe 11 can be more flexibly controlled, achieving precise regulation and management.

[0046] The first isolation valve 104 and the second isolation valve 106 can cut off the water flow when needed, preventing unexpected situations caused by faults or maintenance and improving the safety of the system. At the same time, the presence of these valves also facilitates local maintenance and inspection without the need to shut down the entire system.

[0047] In addition, the first regulating valve 105 can precisely control the flow in the primary water supply pipe 11, ensuring efficient heat energy transmission between the primary network 10 and the secondary network 20, and improving the heat energy utilization efficiency of the overall heat network load monitoring system.

[0048] In some embodiments, the heat network load monitoring system further comprises a third isolation valve 107, a second flow sensor 108, a second temperature sensor 109, and a second pressure sensor 110. The third isolation valve 107, the second flow sensor 108, the second temperature sensor 109, and the second pressure sensor 110 are arranged in the primary return water pipe 12.

[0049] In the present disclosure, by arranging the second flow sensor 108, the second temperature sensor 109, and the second pressure sensor 110 on the primary return water pipe 12, the flow, temperature, and pressure of the water in the primary return water pipe 12 can be monitored in real time, thereby more accurately controlling and regulating heat energy transmission and ensuring efficient operation of the system.

[0050] By monitoring the flow, temperature, and pressure of the primary return water pipe 12, the working state of the heat exchanger can be better adjusted to ensure efficient heat energy transmission between the primary network 10 and the secondary network 20, and improve the heat energy utilization efficiency of the overall heat network load monitoring system.

[0051] In addition, the data of these sensors can provide an important reference for the safe operation of the system, and timely discover and handle possible abnormal conditions (such as excessive or insufficient flow, excessively high or low temperature, abnormal pressure, etc.), preventing equipment damage or system failure caused by these factors.

[0052] In some embodiments, the secondary network 20 includes a secondary water supply pipe 21 and a secondary water return pipe 22. The water supply pipe 21 has a water supply port connected to the user end, and a water outlet connected to the water inlet of the cold end of the heat exchanger. The water return pipe 22 has a water inlet connected to the water outlet of the cold end of the heat exchanger, and a water return port connected to the user end. The first circulating pump 201 is arranged on the secondary water supply pipe 21, and is used to pump water from the user end to the water inlet of the cold end of the heat exchanger.

[0053] In the present disclosure, by arranging the first circulating pump 201 on the secondary water supply pipe 21, the water supply from the user end can be effectively pumped to the cold end of the heat exchanger, ensuring smooth water flow in the secondary network 20 and improving the circulation efficiency of the system. The first circulating pump 201 can ensure stable water flow into the cold end of the heat exchanger, thereby more efficiently exchanging heat and improving the overall heat energy utilization efficiency of the heat network load monitoring system. The presence of the circulating pump can ensure the continuity and stability of the water flow, reduce system failures caused by poor water flow, and improve the stability and reliability of the system.

[0054] In some embodiments, the heat network load monitoring system further includes a fourth isolation valve 202 and a fifth isolation valve 206. The fourth isolation valve 202 is arranged on the secondary water supply pipe 21, and the fifth isolation valve 206 is arranged on the secondary water return pipe 22.

[0055] In the present disclosure, by arranging the fourth isolation valve 202 and the fifth isolation valve 206 on the secondary water supply pipe 21 and the secondary water return pipe 22 respectively, water flow can be cut off or controlled when needed, achieving flexible control of the secondary network 20. The fourth isolation valve 202 and the fifth isolation valve 206 can cut off the water flow during maintenance, repair or failure, preventing water leakage or other accidents, and improving the safety of the system. At the same time, the presence of these valves also facilitates local maintenance and inspection without the need to shut down the entire system.

[0056] In some embodiments, the heat network load monitoring system further includes a third pressure sensor 203, a third temperature sensor 204 and a third flow sensor 205. The third pressure sensor 203, the third temperature sensor 204 and the third flow sensor 205 are arranged on the secondary water supply pipe 21.

[0057] In the present disclosure, by arranging the third pressure sensor 203, the third temperature sensor 204 and the third flow sensor 205 on the secondary water supply pipe 21, the pressure, temperature and flow in the secondary water supply pipe 21 can be monitored in real time, thereby more accurately controlling and adjusting heat energy transmission and ensuring efficient operation of the system.

[0058] By monitoring the pressure, temperature and flow of the secondary water supply pipe 21, the working state of the heat exchanger can be better adjusted to ensure efficient transmission of heat energy between the primary network 10 and the secondary network 20, and improve the heat energy utilization efficiency of the overall heat network load monitoring system.

[0059] In addition, the data of these sensors can provide important reference for the safe operation of the system, and timely discover and handle possible abnormal situations (such as excessively high or low pressure, abnormal temperature, abnormal flow, etc.), to prevent equipment damage or system failure caused by these factors.

[0060] In some embodiments, the heat network load monitoring system further comprises a fourth pressure sensor 207, a fourth temperature sensor 208 and a fourth flow sensor 209. The fourth pressure sensor 207, the fourth temperature sensor 208 and the fourth flow sensor 209 are respectively arranged on the secondary return water pipe 22.

[0061] In the present disclosure, by arranging the fourth pressure sensor 207, the fourth temperature sensor 208 and the fourth flow sensor 209 on the secondary return water pipe 22, the pressure, temperature and flow in the secondary return water pipe 22 can be monitored in real time, so as to more accurately control and adjust the heat energy transmission and ensure the efficient operation of the system.

[0062] By monitoring the pressure, temperature and flow of the secondary return water pipe 22, the working state of the heat exchanger can be better adjusted to ensure efficient transmission of heat energy between the primary network 10 and the secondary network 20, and improve the heat energy utilization efficiency of the overall heat network load monitoring system.

[0063] In some embodiments, the first regulating valve 105 is an electric valve.

[0064] One specific example provided by the present disclosure includes:

[0065] The heat network load monitoring system comprises a water supply main pipe 1, a return water main pipe 2, a second circulating pump 3, a heat exchanger (including a first heat exchanger 4, a second heat exchanger 5 and a third heat exchanger 6), and a heat user end (including a first user end 7, a second user end 8 and a third user end 9).

[0066] The primary network 10 comprises a primary water supply pipe 11 and a primary return water pipe 12. The primary water supply pipe 11 is provided with a first pressure sensor 101, a first temperature sensor 102, a first flow sensor 103, a first isolation valve 104, a first regulating valve 105 and a second isolation valve 106.

[0067] The primary return water pipe 12 is provided with a third isolation valve 107, a second pressure sensor 110, a second temperature sensor 109 and a second flow sensor 108.

[0068] The secondary network 20 comprises a secondary water supply pipe 21 and a secondary water return pipe 22. The first circulating pump 201, the fourth isolation valve 202, the third pressure sensor 203, the third temperature sensor 204 and the third flow sensor 205 are arranged on the secondary water supply pipe 21.

[0069] The fifth isolation valve 206, the fourth pressure sensor 207, the fourth temperature sensor 208 and the fourth flow sensor 209 are arranged on the secondary water return pipe 22.

[0070] Reference Figure 1 , Figure 1 The primary network comprises three primary networks, the secondary network comprises three secondary networks, the heat exchanger comprises three heat exchangers, and the user end comprises three user ends.

[0071] A high-precision pressure measuring point, a temperature measuring point and a flow measuring point are arranged on the primary water supply pipe 11 and the primary water return pipe 12 of each primary network, and an electric regulating valve and an isolation valve are arranged.

[0072] A high-precision pressure measuring point, a temperature measuring point and a flow measuring point are arranged on the secondary water supply pipe 21 and the secondary water return pipe 22 of each secondary network, and an isolation valve is arranged.

[0073] The disclosure further discloses a heat network load online distribution and intelligent adjustment method, which mainly comprises the following steps:

[0074] The first step is to calculate the heat load demand of the building in real time when the outdoor temperature changes, and the value of the heating load change can be calculated according to the following formula:

[0075]

[0076] Wherein: Q ， The real-time heat load demand at the current outdoor temperature (unit: W),

[0077] Q - Design heat load (unit: W),

[0078] t w, Real-time temperature (unit: ℃),

[0079] t n Indoor heating design temperature (unit: ℃),

[0080] t w Outdoor heating calculation temperature (unit: ℃),

[0081] GJ / a - Unit: gigajoule per square meter.

[0082] The second step is to calculate the required primary network heat load according to the heat load demand:

[0083] Assuming that the heat exchange coefficient of the plate heat exchanger is k, the secondary network heat load demand is Q ， The primary network heat load demand is:

[0084] Q a = k*Q ， ,

[0085] Q a The primary network heat load demand (unit: W).

[0086] Thirdly, according to the primary network supply and return water temperature, pressure calculation, heat load demand calculation required primary network flow:

[0087] M = Q a / (H1-H2)

[0088] M - primary network supply water flow (unit: t / h),

[0089] H1 - primary network supply water enthalpy (unit: KJ / Kg),

[0090] H2 - primary network return water enthalpy (unit: KJ / Kg).

[0091] Fourthly, the calculated demand data is transmitted to the primary network control system in real time, the control system integrates the demand data of each heat user, calculates the total network heat load demand, adjusts the frequency of the first circulating pump 3 according to the total heat load demand, and adjusts the opening degree of the first regulating valve 105 according to the demand of each user to distribute the flow of each user.

[0092] Fifthly, further according to the outdoor weather and user and system historical data as input, the heat load of the heat exchange station, building and house end is predicted, the primary network and secondary network supply water temperature curve is predicted based on system characteristic analysis, and prediction adjustment is realized.

[0093] Compared with the prior art, the utility model discloses a kind of heat network load online distribution and intelligent adjustment method, by adding high-precision measuring point and remote regulating system. By real-time calculation required water supply flow adjustment user temperature, make heating economy and user comfort reach the best balance point, further, the system can realize load prediction and pre-adjustment according to temperature change. The utility model has small range of modification, low investment cost, high operation reliability, and is conducive to further popularization and application.

[0094] It can be understood that the above implementation is only an exemplary implementation for illustrating the principle of the present disclosure, but the present disclosure is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also considered as the protection scope of the present disclosure.

Claims

1. A heat network load monitoring system, characterized in that The utility model relates to a kind of water supply systems, including: Water supply main pipe, backwater main pipe, primary network, secondary network and heat exchanger; The water supply port of the primary network is communicated with the water supply main pipe, and the backwater port of the primary network is communicated with the backwater main pipe;First pressure sensor is arranged on the primary network, and the first pressure sensor is used to detect the pressure in the primary network; The water supply port and backwater port of the secondary network are connected to user end respectively; Wherein, the primary network and the secondary network are communicated with the heat exchanger respectively;The heat exchanger is used to heat exchange the water supply heat of primary network to the water supply of secondary network, for user end use.

2. The heat network load monitoring system according to claim 1, characterized in that The primary network includes primary water supply pipe and primary backwater pipe;The water supply port of the primary water supply pipe is communicated with the water supply main pipe, and the water outlet of the primary water supply pipe is communicated with the water inlet of the hot end of the heat exchanger; The water inlet of the primary backwater pipe is communicated with the water outlet of the hot end of the heat exchanger, and the backwater port of the primary backwater pipe is communicated with the backwater main pipe; Wherein, the first pressure sensor is arranged on the primary water supply pipe, for detecting the pressure in the primary water supply pipe.

3. A heat network load monitoring system according to claim 2, characterised in that, Further including: First temperature sensor is arranged on the primary water supply pipe, and the first temperature sensor is used to detect the temperature in the primary water supply pipe.

4. The heat network load monitoring system according to claim 2, characterized in that Further including: First flow sensor is arranged on the primary water supply pipe, and the first flow sensor is used to detect the flow in the primary water supply pipe.

5. The heat network load monitoring system according to claim 2, characterized in that Further including: First isolation valve, first regulating valve and second isolation valve;The first regulating valve is arranged on the primary water supply pipe; The first isolation valve is arranged on the upstream of the first regulating valve; The second isolation valve is arranged on the downstream of the first regulating valve.

6. The heat network load monitoring system according to claim 2, characterized in that Further including: Third isolation valve, second flow sensor, second temperature sensor and second pressure sensor; The third isolation valve, the second flow sensor, the second temperature sensor and the second pressure sensor are arranged on the primary backwater pipe respectively.

7. The heat network load monitoring system of claim 1, wherein, The secondary network includes secondary water supply pipe and secondary backwater pipe;The water supply port of the secondary water supply pipe is communicated with the user end, and the water outlet of the secondary water supply pipe is communicated with the water inlet of the cold end of the heat exchanger; The water inlet of the secondary backwater pipe is communicated with the water outlet of the cold end of the heat exchanger, and the backwater port of the secondary backwater pipe is communicated with the user end; First circulating pump is arranged on the secondary water supply pipe, and the first circulating pump is used to pump the user end water supply to the water inlet of the cold end of the heat exchanger.

8. A heat network load monitoring system according to claim 7, characterised in that, Further including: Fourth isolation valve and fifth isolation valve;The fourth isolation valve is arranged on the secondary water supply pipe; The fifth isolation valve is arranged on the secondary backwater pipe.

9. The heat network load monitoring system of claim 7, wherein, Further including: Third pressure sensor, third temperature sensor and third flow sensor;The third pressure sensor, the third temperature sensor and the third flow sensor are arranged on the secondary water supply pipe respectively.

10. The heat network load monitoring system of claim 7, wherein, Further including: Fourth pressure sensor, fourth temperature sensor and fourth flow sensor;The fourth pressure sensor, the fourth temperature sensor and the fourth flow sensor are arranged on the secondary backwater pipe respectively.

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