A valve control system and control method for heating pipeline

Abstract

The present invention proposes a valve control system and control method for a heating pipeline, which can quickly change the temperature of the pipeline network by providing additional heat at the valve outlet, and the additional heat comes from solar energy, which does not consume fuel and is energy-saving and environmentally friendly. The heat is stored through phase change heat storage technology and released when needed to heat the heating pipeline network. The heat exchanger performs heat exchange on the fluid in the branch pipeline to increase the temperature of the branch pipeline fluid; when the temperature sensor detects that the temperature of the fluid in the branch pipeline meets the standard, the temperature sensor sends an instruction to the controller, and the controller controls the opening of the regulating valve, and the heat exchange fluid of the heat storage system stops circulating. The valve control system proposed by the present invention controls the opening of the regulating valve through the controller, and then receives and absorbs the heat from the solar heater through the heat storage tank, so as to achieve the temperature of the branch pipeline fluid. It has a simple structure and solves the problem of insufficient heat supply in the branch pipeline. It has good application prospects in the field of heating.

Description

Technical Field

[0001] The invention belongs to the field of heating, and relates to a valve control system and a control method for a heating pipeline. Background Art

[0002] The regulating valve in the heating system can adjust the parameters such as the flow rate and temperature of the pipe network, so as to overcome the uneven temperature and reduce energy consumption. When the terminal heat user encounters the problem of uneven temperature, the regulating valve opening in the colder area can be adjusted to increase the flow rate of the water supply pipe network, thereby increasing the temperature. However, due to the heat storage characteristics and time lag of the pipe network, the effect of changing the regulating valve opening on the temperature is not immediate. When the regulating valve opening is increased, it generally takes a period of time before the heat from the heat source is transmitted to the terminal user. This problem is not conducive to the overall optimization and regulation of the pipe network. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a valve control system and control method for a heating pipeline, aiming to solve the defective technical problem of insufficient heating supply to the terminal heat users of the heating pipeline in the prior art.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention proposes a valve control system for a heating pipeline, comprising a regulating valve, a controller, a temperature sensor and a heat storage system; the regulating valve is arranged on the heating pipeline; the controller is installed in a thermal power station; the temperature sensor is arranged on a return water pipeline, and the heat storage system is arranged on a branch pipeline;

[0006] The heat storage system comprises a heat storage tank; a solar heater for providing heat is provided on one side of the heat storage tank, a second pump capable of controlling water flow is provided between the heat storage tank and the solar heater, and the heat storage tank, the solar heater and the second pump are connected to form a loop; a heat exchanger for heat exchange is provided on the other side of the heat storage tank, a first pump capable of controlling water flow is provided between the heat exchanger and the heat storage tank, and the heat storage tank, the heat exchanger and the first pump are connected to form a loop;

[0007] The regulating valve, the first pump, the temperature sensor and the second pump are all electrically connected to a controller, and the controller can control the opening and closing of the regulating valve, the first pump and the second pump.

[0008] Preferably, the regulating valve is connected to the controller via a cable.

[0009] Preferably, the first pump and the second pump are both connected to the controller via cables.

[0010] Preferably, the temperature sensor is connected to the controller via a cable.

[0011] Preferably, the heat storage tank is filled with phase change material for absorbing heat from the solar heater.

[0012] Preferably, the first pump is fixed to the branch pipeline by welding or screwing;

[0013] The second pump is fixed to the branch pipeline by welding or screws.

[0014] Preferably, the regulating valve is fixed to the heating pipe by welding or screwing;

[0015] The heat exchanger is fixed on the branch pipeline by welding or screwing;

[0016] The heat storage tank is fixed on the branch pipeline by welding or screwing.

[0017] Preferably, the temperature sensor is fixed to the branch pipeline by welding or screwing;

[0018] The solar heater is fixed on the branch pipeline by welding or screwing.

[0019] The present invention also proposes a control method for a valve control system of a heating pipeline, comprising the following steps:

[0020] First, after the temperature sensor feeds back the low temperature state of the return water pipe to the controller, the controller sends instructions to the regulating valve, the first pump and the second pump to increase the opening of the regulating valve and turn on the first pump and the second pump;

[0021] Secondly, the second pump transports the water heated by the solar heater to the heat storage tank. Under the action of the first pump, the water in the heat storage tank exchanges heat with the fluid in the branch pipe through the heat exchanger, and then circulates the heat exchanged water to the heat storage tank. Under the action of the second pump, the circulating water is transported to the solar heater to heat the circulating water.

[0022] Finally, when the temperature sensor detects that the fluid temperature in the return pipe reaches the standard, the temperature sensor sends an instruction to the controller, the controller controls the opening of the regulating valve, and turns off the first pump and the second pump, and the heat exchange fluid of the heat storage system stops circulating.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The valve control system for heating pipeline proposed by the present invention can make the pipe network change temperature quickly by providing additional heat at the valve outlet, so as to solve the problem of insufficient heat supply to the terminal heat user. Specifically, the temperature of the fluid in the branch pipeline is fed back to the controller through the temperature sensor, and the controller can send instructions to the regulating valve, the first pump and the second pump, so that the heat storage tank receives and absorbs the heat from the solar heater, and transmits the heat to the heat exchanger, and the heat exchanger performs heat exchange on the fluid in the branch pipeline to increase the temperature of the branch pipeline fluid; when the temperature sensor detects that the fluid temperature of the branch pipeline reaches the standard, the temperature sensor sends an instruction to the controller, and the controller controls the opening of the regulating valve, and the heat exchange fluid of the heat storage system stops circulating. The valve control system for heating pipeline proposed by the present invention controls the opening of the regulating valve and the opening and closing of the first pump and the second pump through the controller, and then receives and absorbs the heat from the solar heater through the heat storage tank, so as to realize the temperature of the branch pipeline fluid. The structure is simple, and the problem of insufficient heat supply of the branch pipeline is solved, and it has a good application prospect in the field of heating.

[0025] Furthermore, the heat storage tank is filled with phase change material, and heat is provided by a solar heater, so that the fluid in the heating pipe network can be heated during the heat release process.

[0026] The present invention also proposes a heating method for a valve control system for a heating pipeline, wherein the temperature of the fluid in the branch pipeline is fed back to the controller through a temperature sensor, and the controller controls the opening of the regulating valve, and then the heat storage tank receives and absorbs the heat from the solar heater, and transmits the heat to the heat exchanger to achieve heat exchange of the fluid, thereby increasing the temperature of the fluid in the branch pipeline. The heating method for a valve control system for a heating pipeline proposed by the present invention is simple to operate and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of the valve control system of the heating pipeline of the present invention.

[0028] Among them: 1- regulating valve; 2- heat exchanger; 3- controller; 4- first pump; 5- heat storage tank; 6- temperature sensor; 7- solar heater; 8- second pump. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0032] The present invention provides a valve control system for a heating pipeline, such as Figure 1 As shown, it includes a regulating valve 1, a controller 3, a temperature sensor 6 and a heat storage system. The regulating valve 1 is arranged on the heating pipeline; the controller 3 is installed in the heating station; the temperature sensor 6 is arranged on the return water pipeline, and the heat storage system is arranged on the branch pipeline.

[0033] The heat storage system includes a heat storage tank 5, a solar heater 7 for providing heat is provided on one side of the heat storage tank 5, and a second pump 8 capable of controlling water flow is provided between the heat storage tank 5 and the solar heater 7; a heat exchanger 2 for heat exchange is provided on the other side of the heat storage tank 5, and a first pump 4 capable of controlling water flow is provided between the heat exchanger 2 and the heat storage tank 5; the heat storage tank 5, the solar heater 7 and the second pump 8 are connected to form a loop; the heat exchanger 2, the heat storage tank 5 and the first pump 4 are connected to form a loop; the regulating valve 1, the first pump 4, the temperature sensor 6 and the second pump 8 are all electrically connected to the controller 3, and the controller 3 can control the opening and closing of the regulating valve 1, the first pump 4 and the second pump 8.

[0034] The regulating valve 1 , the first pump 4 , the temperature sensor 6 and the second pump 8 are all connected to the controller 3 via cables.

[0035] The first pump 4 is fixed to the branch pipeline by welding or screwing. The heat storage tank 5 is filled with phase change material to absorb heat from the solar heater 7. The controller 3 receives signals from the regulating valve 1 on the heating pipeline and the temperature sensor 6 on the return pipe to control the opening and closing of the first pump 4 and the second pump 8. The heat exchanger 2 can realize heat exchange between the heating network fluid and the heat exchange fluid from the heat storage tank 5. The second pump 8 is fixed to the branch pipeline by welding or screwing. The regulating valve 1 is fixed to the heating pipeline by welding or screwing; the heat exchanger 2 is fixed to the branch pipeline by welding or screwing; the heat storage tank 5 is fixed to the branch pipeline by welding or screwing; the temperature sensor 6 is fixed to the return pipe by welding or screwing; the solar heater 7 is fixed to the branch pipeline by welding or screwing.

[0036] For conventional heating networks, there is only a regulating valve 1 on the water supply pipeline. When the temperature of the heat user at the end of the branch does not meet the standard, the opening of the regulating valve 1 needs to be increased to increase the temperature of the pipe network. At this time, the flow rate of the pipe network increases instantaneously, but due to the hysteresis of temperature transmission, the fluid temperature after the regulating valve 1 cannot increase instantaneously, which makes it difficult to control the heating network.

[0037] The present invention proposes a valve control system for a heating pipeline, which can quickly change the temperature of the pipeline network by providing additional heat at the valve outlet, thereby solving the problem of insufficient heat supply to the terminal heat users; and the additional heat comes from solar energy, does not consume fuel, and has the characteristics of energy saving and environmental protection. The heat is stored through phase change heat storage technology and released when needed to heat the heating pipeline network. The heat storage material in the present invention is a material with a phase change point slightly higher than the pipeline network temperature. Since the temperature of the phase change material remains approximately unchanged during the phase change process, it can heat the fluid in the heating pipeline network without causing a large fluctuation in the temperature of the heating pipeline network, which is beneficial to ensuring the safety of the pipeline network.

[0038] The working principle and working process of a control method for a valve control system of a heating pipeline proposed by the present invention are as follows:

[0039] First, after the temperature sensor 6 feeds back the low temperature state of the return water pipe to the controller 3, the controller 3 sends instructions to the regulating valve 1, the first pump 4 and the second pump 8 to increase the opening of the regulating valve 1 and turn on the first pump 4 and the second pump 8;

[0040] Secondly, the second pump 8 transports the water heated by the solar heater 7 to the heat storage tank 5. Under the action of the first pump 4, the water in the heat storage tank 5 exchanges heat with the fluid in the branch pipe through the heat exchanger 2, and then circulates the heat exchanged water to the heat storage tank 5. Under the action of the second pump 8, the circulating water is transported to the solar heater 7 to heat the circulating water.

[0041] Finally, when the temperature sensor 6 detects that the fluid temperature in the return pipe reaches the standard, the temperature sensor 6 sends an instruction to the controller 3, and the controller 3 controls the opening of the regulating valve 1 and turns off the first pump 4 and the second pump 8, and the heat exchange fluid of the heat storage system stops circulating.

[0042] Specifically, when the opening degree of the regulating valve 1 of the heating network increases, the network flow rate increases instantaneously. At this time, a signal is transmitted to the controller 3, and the controller 3 controls the first pump 4 to start, and the heat exchange fluid of the heat storage system circulates to the heat exchanger 2. The heat exchange fluid of the heat storage system and the working fluid in the heating network perform heat exchange, thereby increasing the temperature of the heating network, and quickly improving the problem of the temperature of the heat user at the end of the branch not meeting the standard.

[0043] When the temperature sensor 6 on the return water pipeline detects that the return water temperature reaches the standard, that is, the heat supply to the terminal heat user is normal, the controller 3 controls the first pump 4 to be turned off, and the heat exchange fluid of the heat storage system stops circulating.

[0044] During the daytime when there is sunshine, the second pump 8 is started, water absorbs heat in the solar heater 7, and circulates to the heat storage tank 5 under the action of the second pump 8, and releases heat to the heat storage material in the heat storage tank 5. The heat storage tank 5 is filled with phase change material, and the heat is provided by the solar heating device 7 and stored in the phase change material, which can heat the fluid of the heating network during the heat release process.

[0045] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A control method for a valve control system of a heating pipeline, characterized in that: A valve control system for a heating pipeline comprises a regulating valve (1), a controller (3), a temperature sensor (6) and a heat storage system; the regulating valve (1) is arranged on the heating pipeline; the controller (3) is installed in a heating station; the temperature sensor (6) is arranged on a return water pipeline, and the heat storage system is arranged on a branch pipeline; the heat storage system comprises a heat storage tank (5); a solar heater (7) for providing heat is arranged on one side of the heat storage tank (5); a second pump (8) capable of controlling water flow is arranged between the heat storage tank (5) and the solar heater (7); the heat storage tank (5), the solar heater (7) and the second pump (8) are connected to form a loop; a heat exchanger (2) for heat exchange is arranged on the other side of the heat storage tank (5); (2) A first pump (4) capable of controlling water flow is arranged between the heat storage tank (5); the heat storage tank (5), the heat exchanger (2) and the first pump (4) are connected to form a loop; the regulating valve (1), the first pump (4), the temperature sensor (6) and the second pump (8) are all electrically connected to the controller (3); the controller (3) is capable of controlling the opening and closing of the regulating valve (1), the first pump (4) and the second pump (8); the regulating valve (1) is connected to the controller (3) via a cable; the first pump (4) and the second pump (8) are both connected to the controller (3) via a cable; the temperature sensor (6) is connected to the controller (3) via a cable; the heat storage tank (5) is filled with a phase change material for absorbing heat from the solar heater (7); The control method comprises the following steps: First, after the temperature sensor (6) feeds back the low temperature state of the return water pipe to the controller (3), the controller (3) sends instructions to the regulating valve (1), the first pump (4) and the second pump (8) to increase the opening of the regulating valve (1) and turn on the first pump (4) and the second pump (8); Secondly, the second pump (8) transports the water heated by the solar heater (7) to the heat storage tank (5). Under the action of the first pump (4), the water in the heat storage tank (5) exchanges heat with the fluid in the branch pipe through the heat exchanger (2). The water after the heat exchange is then circulated to the heat storage tank (5). Under the action of the second pump (8), the circulating water is transported to the solar heater (7) to achieve heating of the circulating water. Finally, when the temperature sensor (6) detects that the temperature of the fluid in the return pipe reaches the standard, the temperature sensor (6) sends an instruction to the controller (3), and the controller (3) controls the opening of the regulating valve (1) and turns off the first pump (4) and the second pump (8), so that the heat exchange fluid of the heat storage system stops circulating.

2. The control method for a valve control system for a heating pipeline according to claim 1, characterized in that: The first pump (4) is fixed to the branch pipeline by welding or screwing; The second pump (8) is fixed to the branch pipeline by welding or screwing.

3. The control method for a valve control system for a heating pipeline according to claim 1, characterized in that: The regulating valve (1) is fixed to the heating pipe by welding or screwing; The heat exchanger (2) is fixed to the branch pipeline by welding or screwing; The heat storage tank (5) is fixed to the branch pipeline by welding or screwing.

4. The control method for a valve control system for a heating pipeline according to claim 1, characterized in that: The temperature sensor (6) is fixed to the branch pipeline by welding or screwing; The solar heater (7) is fixed to the branch pipeline by welding or screwing.

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