A pipeline phase-change heat storage device with replaceable heat storage unit and working method thereof

Abstract

The present invention proposes a pipeline phase change heat storage device with a replaceable heat storage unit and a working method thereof, in order to solve the technical problems of high cost, complex structure and difficult operation of the existing heat storage device. The present invention is installed in the transmission pipeline of the heating network, and includes a receiving control unit, a heat storage and heat release unit, a heat storage and heat release valve assembly and a sensing unit. The receiving control unit is respectively connected to the heat storage and heat release unit, the heat storage and heat release valve assembly and the sensing unit through a control line. The heat storage and heat release unit is arranged in the transmission pipeline and the heat storage and heat release unit is connected to the transmission pipeline through a movable connection assembly. The present invention adopts a replaceable phase change heat storage structure to realize the conversion between the transmission pipeline and the heat storage device, and the idle transmission pipeline is reused, which reduces the construction cost. The heat storage and heat release methods are flexible, and the network end energy storage and peak regulation can be achieved. The phase change heat storage is adopted, and the heat storage capacity is large. In addition, the heat storage device is also convenient for direct burial placement, which reduces the space occupied on the ground and has a low placement cost.

Description

Technical Field

[0001] The present invention relates to the technical field of heat storage equipment, and in particular to a pipeline-type phase-change heat storage device with a replaceable heat storage unit and a working method thereof. Background Art

[0002] At present, there are two problems with energy efficiency in my country. On the one hand, a large amount of industrial waste heat is wasted because it cannot be effectively utilized. On the other hand, many heat users rely on their own boilers to generate heat energy, resulting in a huge waste of energy. With the continuous advancement of clean urban heating in my country, the proportion of natural gas heating has increased year by year, and the heating cost has also shown an increasing trend year by year. Compared with coal-fired and natural gas heating, industrial waste heat heating has obvious energy-saving benefits and much lower heat source costs. However, there are many types of industrial waste heat, and its quantity is uncertain in form, time, quantity, space, etc. Compared with the traditional waste heat recovery technology level, it is difficult to be efficiently utilized. Appropriate heat storage devices are needed to store heat to achieve stable and continuous use of waste heat.

[0003] There is a large decentralized heat user market in the marginal areas of my country's cities and towns, and it is difficult for the centralized heating system to cover them in time. However, in these areas, the municipal pipeline network has been laid synchronously with the municipal roads. A large part of these pipelines have not been connected with the active heating pipeline network in time, forming a lot of passive direct buried heating pipelines, causing many decentralized heat users to have heating pipelines around them but have not been heated for many years. The heating pipelines laid around these heat users can be used as heat storage containers for heating heat sources. Compared with traditional heat storage tanks, they have the advantages of occupying less ground space, good insulation, and less heat dissipation.

[0004] Recently, the country has proposed the requirement that cogeneration should achieve heat and electricity decoupling. With the strict implementation of the policy, the centralized heating system needs to be equipped with heat storage equipment to improve the stability of heating. However, setting up large tank heat storage devices at the source requires large investments, occupies a lot of space, and is difficult to dispatch. Setting up appropriate heat storage equipment at the network end is a need for technological development.

[0005] Therefore, it is necessary to utilize the long-distance pipelines, transmission trunk lines, and idle pipelines at the end of the heating network to install pipeline phase change heat storage devices, and perform heat storage operation adjustments at the network end to improve the impact of large fluctuations in the heating capacity of the heating system as the power load changes. Summary of the invention

[0006] In view of the technical problems of high cost, complex structure and difficult operation of existing heat storage devices, the present invention proposes a pipeline phase change heat storage device with a replaceable heat storage unit and a working method thereof, and transforms the long-distance pipelines, transmission trunk lines and idle terminal pipelines of the existing heating network, and arranges a replaceable heat storage and release unit in the transmission pipeline. The heat storage and release in the transmission pipeline are controlled by a receiving control unit as needed. The transformation cost is low, the transformation structure is simple, and the operation is convenient for construction personnel. The heat storage and release units can be replaced and adjusted as needed, and the application scenarios are wide.

[0007] In order to achieve the above object, the technical solution of the present invention is achieved as follows:

[0008] A pipeline phase change heat storage device with a replaceable heat storage unit is installed on a delivery pipeline of a heating network, and comprises a receiving control unit, a heat storage and heat release unit, a heat storage and heat release valve assembly and a sensing unit. The receiving control unit is respectively connected to the heat storage and heat release unit, the heat storage and heat release valve assembly and the sensing unit through control lines. The heat storage and heat release unit is arranged in the delivery pipeline and is connected to the delivery pipeline through a movable connection assembly. The heat storage and heat release valve assembly and the sensing unit are both arranged on the delivery pipeline and the heat storage and heat release valve assembly matches the heat storage and heat release unit.

[0009] Furthermore, there are two delivery pipelines, which are connected via a first connecting valve and a second connecting valve at both ends, and the heat storage and heat release valve components are matched with the first connecting valve and the second connecting valve respectively.

[0010] Furthermore, the heat storage and heat release valve assembly includes a heat storage inlet, a heat storage outlet, a heat release inlet and a heat release outlet. The heat storage inlet and the heat storage outlet are respectively arranged at the end of the same one end of the two conveying pipelines. The heat storage inlet is matched with the first connecting valve and the second connecting valve respectively. The heat storage outlet is matched with the first connecting valve and the second connecting valve respectively. The heat release inlet and the heat release outlet are respectively arranged at the end of the same other end of the two conveying pipelines. The heat release inlet is matched with the first connecting valve and the second connecting valve respectively. The heat release outlet is matched with the first connecting valve and the second connecting valve respectively. The heat storage inlet, the heat storage outlet, the heat release inlet and the heat release outlet are all provided with on-off valves. The first connecting valve, the second connecting valve and the on-off valve are all connected to the receiving control unit through a control line.

[0011] Furthermore, the heat storage and release unit includes a plurality of hollow heat storage unit cages and long-chain hinged rings. The hollow heat storage unit cages are connected to each other through long-chain hinged rings. The hollow heat storage unit cages at the ends are connected to the conveying pipeline through movable connection components. A phase change heat storage component is arranged in the hollow heat storage unit cage.

[0012] Furthermore, the phase change heat storage component includes a capsule-type phase change heat storage device and a miniature wireless temperature sensor. The capsule-type phase change heat storage device is provided with a phase change heat storage medium. The miniature wireless temperature sensor is arranged on the capsule-type phase change heat storage device. The miniature wireless temperature sensor is wirelessly connected to the receiving control unit.

[0013] Furthermore, the sensing unit includes a temperature sensor, a pressure sensor, a pressure gauge and a thermometer. The temperature sensor, pressure sensor, pressure gauge and thermometer are respectively arranged on the conveying pipeline and the temperature sensor, pressure sensor, pressure gauge and thermometer are matched with the flowing working fluid in the conveying pipeline. The receiving control unit is respectively connected to the temperature sensor and the pressure sensor through a control line.

[0014] Furthermore, a safety valve, an air release valve and a water discharge valve are provided on the delivery pipeline.

[0015] Furthermore, the movable connection component includes a replaceable interface, a connecting fixing plate, a long chain fixing ring and a long chain end fixing locking ring. The replaceable interface is installed on the conveying pipeline and the replaceable interface is connected to the conveying pipeline. The connecting fixing plate is connected to the replaceable interface through bolts and a sealing ring. A temperature signal receiver is installed on the upper end of the connecting fixing plate. The temperature signal receiver is connected to the receiving control unit through a control line. The long chain fixing ring is fixedly arranged at the lower end of the connecting fixing plate, and the hollow heat storage unit cage is movably connected to the long chain fixing ring through the long chain end fixing locking ring.

[0016] Furthermore, the receiving control unit includes a receiving controller, and an end of the receiving controller is connected to the control circuit.

[0017] A working method of a pipeline-type phase-change heat storage device with a replaceable heat storage unit, using the pipeline-type phase-change heat storage device with a replaceable heat storage unit to store heat and perform heat exchange on a user end, comprising the following steps:

[0018] S1. Start the heat storage program. The heat storage inlet and the heat storage outlet are connected to the heat source end. The construction personnel open the on-off valve of the heat storage inlet, the on-off valve of the heat storage outlet and the first connecting valve through the receiving controller, and close the second connecting valve. The low-temperature water in the delivery pipeline continuously enters the heat source end for heat exchange and then returns to the delivery pipeline. The high-temperature water after heat exchange exchanges heat with the heat storage and heat release unit, and the heat is stored in the heat storage and heat release unit;

[0019] S2. Construction personnel obtain the heat storage progress according to the receiving controller. After the heat storage is completed, the heat release procedure begins. The heat release inlet and the heat release outlet are connected to the user end. The construction personnel open the on-off valve of the heat release inlet, the on-off valve of the heat release outlet and the second connecting valve through the receiving controller, and close the first connecting valve. The low-temperature water at the user end continuously enters the transmission pipeline and exchanges heat with the heat storage and heat release unit and then returns to the user end. The high-temperature water after heat exchange is available for use at the user end.

[0020] S3, after the heat release is completed, the cycle of steps S1 and S2 begins.

[0021] Beneficial effects of the present invention:

[0022] 1. The heat storage device of the present invention transforms the long-distance pipelines, transmission trunk lines and idle terminal pipelines of the existing heating network, and arranges a replaceable heat storage and release unit in the transmission pipeline. The heat storage and release in the transmission pipeline are controlled by a receiving control unit as needed. The transformation cost is low, the transformation structure is simple, and it is convenient for construction personnel to operate. The heat storage and release unit can be replaced and adjusted as needed, and it is applicable to a wide range of scenarios.

[0023] 2. The working method of the heat storage device of the present invention adopts a replaceable phase-change heat storage structure to realize the conversion between the conveying pipeline and the heat storage device. The idle conveying pipeline is reused, which reduces the construction cost. The heat storage and heat release methods are flexible, and the grid-side energy storage and peak regulation can be achieved. The phase-change heat storage has a large heat storage capacity. In addition, the heat storage device is easy to be directly buried, which reduces the space occupied on the ground and has a low placement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention.

[0026] Figure 2 It is a schematic structural diagram of the heat storage and release unit of Example 1 of the present invention.

[0027] Figure 3 This is a schematic diagram of the structure of the hollow heat storage unit cage according to Example 1 of the present invention.

[0028] Figure 4 This is a schematic diagram of the structure of the phase change heat storage component in Example 1 of the present invention.

[0029] Figure 5 For the present invention Figure 1 A is a schematic diagram of the structure of the active connection component shown in FIG.

[0030] Figure 6 This is a flow chart of the working method of embodiment 2 of the present invention.

[0031] In the figure, 1-transmission pipeline, 2-control line, 3-first connecting valve, 4-second connecting valve, 5-heat storage inlet, 6-heat storage outlet, 7-heat release inlet, 8-heat release outlet, 9-on-off valve, 10-hollow heat storage unit cage, 11-long chain hinge ring, 12-capsule type phase change heat storage device, 13-micro wireless temperature sensor, 14-temperature sensor, 15-pressure sensor, 16-pressure gauge, 17-thermometer, 18-safety valve, 19-air release valve, 20-drain valve, 21-replaceable interface, 22-connecting fixing plate, 23-long chain fixing ring, 24-long chain end fixing locking ring, 25-bolt, 26-sealing ring, 27-temperature signal receiver, 28-receiving controller, 29-main pipeline, 30-control valve. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0033] Embodiment 1, a pipeline phase change heat storage device with replaceable heat storage unit, installed on the transmission pipeline 1 of the heating network, such as Figure 1As shown, it includes a receiving control unit, a heat storage and heat release unit, a heat storage and heat release valve assembly and a sensing unit. The receiving control unit is respectively connected with the heat storage and heat release unit, the heat storage and heat release valve assembly and the sensing unit through a control line 2. The heat storage and heat release unit is arranged in a conveying pipeline 1 and the heat storage and heat release unit is connected with the conveying pipeline 1 through a movable connection assembly. The heat storage and heat release valve assembly and the sensing unit are both arranged on the conveying pipeline 1 and the heat storage and heat release valve assembly matches the heat storage and heat release unit. When heat storage is required, the heat source end is connected to the heat storage and heat release valve assembly, the receiving control unit controls the heat storage and heat release valve assembly to open, the low-temperature water in the delivery pipeline 1 enters the heat source end for heat exchange, and the high-temperature water after heat exchange flows back to the delivery pipeline 1, the high-temperature water exchanges heat with the heat storage and heat release unit, the heat storage and heat release unit obtains the heat of the high-temperature water and stores it, the sensing unit is used to obtain various data of the delivery pipeline 1 and the heat storage and heat release unit and transmits them to the receiving control unit, the data transmitted by the sensing unit meets the requirements, and the heat storage is completed; when heat needs to be supplied to the user end of the heating network, the user end is connected to the heat storage and heat release valve assembly, the receiving control unit controls the heat storage and heat release valve assembly to open, the low-temperature water at the user end enters the heat storage and heat release unit for heat exchange, the heat in the heat storage and heat release unit is transferred to the low-temperature water, the temperature of the low-temperature water increases and is converted into high-temperature water, and the high-temperature water flows back to the user end for use, the sensing unit is used to obtain various data of the delivery pipeline 1 and the heat storage and heat release unit and transmits them to the receiving control unit, the data transmitted by the sensing unit meets the requirements, and the heat release is completed. The whole process is simple to operate, utilizes the structure of the existing heating network pipe, is easy to transform and has low cost.

[0034] It is worth noting that due to the different use areas and the need for cleaning and replacement during use, the heat storage and heat release unit in this embodiment is movably connected to the delivery pipeline 1 through a movable connection component. When the heat storage and heat release unit needs to be replaced, it can be completed by simply disconnecting the movable connection component, which is very convenient and fast, conducive to repair and maintenance, and reduces construction costs. In other embodiments of the present invention, other structures can also be used instead of the movable connection component, as long as the purpose of the present invention is achieved.

[0035] It is worth noting that if Figure 1 As shown, this embodiment uses the structure of the existing heating network pipe, and the main pipe 29 of the heating network pipe is connected to the delivery pipe 1 through the control valve 30, and it can be completed by only improving the delivery pipe 1. In other embodiments of the present invention, a new pipeline structure can be remade as needed, as long as the purpose of the present invention is achieved.

[0036] It is worth noting that if Figure 1As shown, in this embodiment, there are two delivery pipelines 1, and the delivery pipelines 1 are connected through the first connecting valve 3 and the second connecting valve 4 at both ends. The heat storage and heat release valve components are matched with the first connecting valve 3 and the second connecting valve 4 respectively. Through the first connecting valve 3 and the second connecting valve 4, the water in the delivery pipeline 1 can circulate between the two delivery pipelines, which facilitates the transfer of heat, improves the heat conversion efficiency, and ensures the efficiency of heat storage and heat release. In other embodiments of the present invention, the number of delivery pipelines 1, the first connecting valve 3 and the second connecting valve 4 can also be adjusted as needed, as long as the purpose of the present invention is achieved.

[0037] Further, such as Figure 1 As shown, the heat storage and heat release valve assembly includes a heat storage inlet 5, a heat storage outlet 6, a heat release inlet 7 and a heat release outlet 8. The heat storage inlet 5 and the heat storage outlet 6 are respectively arranged at the end of the same end of the two conveying pipelines 1. The heat storage inlet 5 is matched with the first connecting valve 3 and the fourth connecting valve 4 respectively. The heat storage outlet 6 is matched with the first connecting valve 3 and the second connecting valve 4 respectively. The heat release inlet 7 and the heat release outlet 8 are respectively arranged at the end of the same other end of the two conveying pipelines 1. The heat release inlet 7 is matched with the first connecting valve 3 and the fourth connecting valve 4 respectively. The heat release outlet 8 is matched with the first connecting valve 3 and the second connecting valve 4 respectively. The heat storage inlet 5, the heat storage outlet 6, the heat release inlet 7 and the heat release outlet 8 are all provided with an on-off valve 9. The receiving control unit is respectively connected with the first connecting valve 3, the second connecting valve 4 and the on-off valve 9 through the control line 2. When heat storage is required, the heat storage inlet 5 and the heat storage outlet 6 are connected to the heat source end, and the receiving control unit controls the heat storage inlet 5 and the heat storage outlet 6 to open the on-off valve 9. At the same time, the first connecting valve 3 is opened and the second connecting valve 4 is closed. The low-temperature water in the conveying pipeline 1 enters the heat source end through the heat storage outlet 6 for heat exchange and is converted into high-temperature water. The high-temperature water enters the conveying pipeline 1 through the heat storage inlet 5 to exchange heat with the heat storage and heat release unit, and the heat is stored in the heat storage and heat release unit. Since only the first connecting valve 3 is opened, the water flows through the heat storage outlet 6, the heat source end, the heat storage inlet 5 and the heat storage and heat release unit and then flows back to the heat storage outlet 6 to form a circulation loop, so that the heat at the heat source end is circulated and transferred to the heat storage and heat release unit, and the heat storage efficiency is relatively high. Of course, when heat release is needed, the heat release inlet 7 and the heat release outlet 8 are connected to the user end, and the receiving control unit controls the on-off valve 9 of the heat release inlet 7, the on-off valve 9 of the heat release outlet 8 and the second connecting valve 4 to open, and the first connecting valve 3 is closed. Water flows through the heat release inlet 7, the heat storage and heat release unit, the heat release outlet 8 and the user end and then flows back to the heat release inlet 7 to form a circulation loop. The heat in the heat storage and heat release unit is circulated and continuously transferred to the water flow, thereby ensuring the water flow temperature at the user end and the heat release efficiency is high.

[0038] It is worth noting that in this embodiment, since water flows from the delivery pipe 1 into the heat source end during the heat storage process, the heat storage inlet 5 and the heat storage outlet 6 are both arranged below the two delivery pipes 1. Similarly, since water flows from the user end into the delivery pipe 1 during the heat release process, the heat release inlet 7 and the heat release outlet 8 are both arranged above the two delivery pipes 1. In other embodiments of the present invention, the positions of the two outlets and the two inlets can be adjusted as needed, as long as the purpose of the present invention is achieved.

[0039] Further, such as Figure 1 and Figure 2 As shown, the heat storage and release unit includes a plurality of hollow heat storage unit cages 10 and long chain hinge rings 11. The hollow heat storage unit cages 10 are connected by the long chain hinge rings 11. The hollow heat storage unit cages 10 at the ends are connected to the delivery pipeline 1 through a movable connection component. A phase change heat storage component is arranged in the hollow heat storage unit cage 10. When storing heat, high-temperature water flows through the hollow heat storage unit cage 10 to transfer heat to the hollow heat storage unit cage 10. After receiving the heat, the hollow heat storage unit cage 10 transfers the heat to the phase change heat storage component for heat storage. Similarly, when releasing heat, when low-temperature water flows through the hollow heat storage unit cage 10, the phase change heat storage component transfers heat to the low-temperature water through the hollow heat storage unit cage 10. As shown in FIG. Figure 3 As shown, since the hollow heat storage unit cage 10 is a hollow structure, the contact area between the water flow and the phase change heat storage component and the hollow heat storage unit cage 10 is greatly increased, and the heat transfer efficiency is enhanced.

[0040] Specifically, Figure 4 As shown, the phase-change heat storage component includes a capsule-type phase-change heat storage device 12 and a micro wireless temperature sensor 13. The capsule-type phase-change heat storage device 12 is provided with a phase-change heat storage medium. The micro wireless temperature sensor 13 is provided on the capsule-type phase-change heat storage device 12. The micro wireless temperature sensor 13 is wirelessly connected to the receiving control unit. The capsule-type phase-change heat storage device 12 is small in size and is stacked in the hollow phase-change heat storage unit cage 10. There are a large number of gaps between adjacent capsule phase-change heat storage devices 12, which increases the contact area with the water flow and the heat transfer efficiency. The micro wireless temperature sensing sensor 13 can transmit the temperature change of the capsule phase-change heat storage device 12 to the receiving control unit in real time, so that the receiving control unit can end the heat storage or heat release process in time, which is convenient and fast.

[0041] It is worth noting that in the present embodiment, the hollow heat storage unit cage 10 is made of a high temperature stable alloy, which is also called a heat-resistant alloy. It is an alloy with stable organization and excellent mechanical, physical and chemical properties under high temperature use environment conditions, including heat-resistant steel, heat-resistant aluminum alloy, heat-resistant titanium alloy, high temperature alloy, refractory alloy, etc. The hollow heat storage unit cage 10 made of high temperature stable alloy overcomes the problem of thermal expansion and contraction of the internal heat pipe in the traditional heat storage device, as well as the problem that the heat exchange tube is prone to liquid leakage and heat transfer deterioration due to volume expansion, and can greatly improve the mechanical properties, heat storage properties and heat transfer properties of the heat storage unit, and improve the life of the heat storage device. In other embodiments of the present invention, other materials can be used to make the hollow heat storage unit cage 10 or other structures can be used to replace the hollow heat storage unit cage 10, as long as the purpose of the present invention is achieved.

[0042] It is worth noting that in this embodiment, a total of 17 hollow heat storage unit cages 10 are arranged in a conveying pipeline 1, and the long chain hinge ring 11 can be partially displaced, and there is no clamping structure around it, so it can be deformed freely. It will not shift greatly during thermal expansion and contraction, but it can be displaced in a small range, and will not be restricted during expansion and contraction, thereby achieving stable and efficient heat exchange. By setting a replaceable and partially displaceable heat storage and heat release unit, the effect of efficient heat exchange can be achieved, and problems such as damage to the orifice plate and the heat exchange flow channel can be avoided, and problems such as contamination of the heat exchange medium can be avoided. In other embodiments of the present invention, the number of hollow heat storage unit cages 10 can also be adjusted as needed, as long as the purpose of the present invention is achieved.

[0043] It is worth noting that in the present embodiment, the outer wall material of the capsule-type phase change heat storage device 12 is stainless steel, which can ensure the stability of the capsule-type phase change heat storage device 12 during the continuous cycle of heat storage and heat release. In other embodiments of the present invention, the outer wall material of the capsule-type phase change heat storage device 12 can also be adjusted as needed, as long as the purpose of the present invention is achieved.

[0044] It is worth noting that in this embodiment, the phase change heat storage medium in the capsule-type phase change heat storage device 12 is a single solid-liquid phase change heat storage material, and the phase change temperature is 90° C. In other embodiments of the present invention, other structures can be used to replace the capsule-type phase change heat storage device 12, and other phase change heat storage mediums such as composite solid-liquid phase change heat storage materials can be used to replace the single solid-liquid phase change heat storage material, and the phase change temperature can be selected within the range of 80 to 90° C., as long as the purpose of the present invention is achieved.

[0045] Further, such as Figure 1As shown, the sensing unit includes a temperature sensor 14, a pressure sensor 15, a pressure gauge 16 and a thermometer 17, and the temperature sensor 14, the pressure sensor 15, the pressure gauge 16 and the thermometer 17 are respectively arranged on the conveying pipeline 1 and the temperature sensor 14, the pressure sensor 15, the pressure gauge 16 and the thermometer 17 are all matched with the flowing working medium in the conveying pipeline 1, and the receiving control unit is respectively connected to the temperature sensor 14 and the pressure sensor 15 through the control line 2. During the heat storage and release process, in addition to obtaining the temperature change of the capsule-type phase change heat storage device 12, it is also necessary to obtain the temperature change of the water flow for cross reference. Therefore, a temperature sensor 14 and a thermometer 17 are set on the conveying pipeline 1 to facilitate the acquisition of the temperature change in the conveying pipeline 1. In addition, when the water flows in the conveying pipeline 1, especially when the high-temperature water flows, a large amount of water vapor is easily generated, causing the pressure in the conveying pipeline 1 to increase, and bubbles are generated in the water flow, causing air blockage in the conveying pipeline 1, thereby affecting the normal operation of heat storage and release and the safety of the conveying pipeline 1. Therefore, a pressure sensor 15 and a pressure gauge 16 are set on the conveying pipeline 1 to timely obtain the pressure change in the conveying pipeline 1 and facilitate pressure adjustment.

[0046] Further, such as Figure 1 As shown, the delivery pipeline 1 is provided with a safety valve 18, an air release valve 19 and a drain valve 20. When the pressure in the delivery pipeline 1 reaches a predetermined value, the safety valve 18 will automatically open to release the pressure. When the pressure in the delivery pipeline 1 drops to a set value, the safety valve 18 will automatically close to ensure the normal operation of the delivery pipeline 1. Of course, construction personnel can also manually use the air release valve 19 to release air, which is convenient and quick. In addition, when the heat storage and heat release unit needs to be replaced, adjusted and maintained, it is only necessary to open the drain valve 20 to release the water flow in the delivery pipeline 1, which is convenient and quick.

[0047] It is worth noting that in other embodiments of the present invention, other structures may be used to replace the above components as long as the purpose of the present invention is achieved.

[0048] Further, such as Figure 1 and Figure 5As shown, the movable connection component includes a replaceable interface 21, a connecting and fixing plate 22, a long chain fixing ring 23 and a long chain end fixing locking ring 24. The replaceable interface 21 is installed on the conveying pipeline 1 and the replaceable interface 21 is connected to the conveying pipeline 1. The connecting and fixing plate 22 is connected to the replaceable interface 21 through bolts 25 and a sealing ring 26. A temperature signal receiver 27 is installed on the upper end of the connecting and fixing plate 22. The temperature signal receiver 27 is connected to the receiving control unit through a control circuit 2. The long chain fixing ring 23 is fixedly arranged at the lower end of the connecting and fixing plate 22, and the hollow heat storage unit cage 10 is movably connected to the long chain fixing ring 23 through the long chain end fixing locking ring 24. When it is necessary to replace, adjust and maintain the heat storage and heat release unit, first, unscrew the bolt 25, open the connecting fixing plate 22, disconnect the long chain end fixing lock ring 24 and the hollow heat storage unit cage 10, and after the replacement, adjustment and maintenance of the heat storage and heat release unit are completed, connect the long chain end fixing lock ring 24 and the hollow heat storage unit cage 10, install the connecting fixing plate 22, screw in the bolt 25 and tighten it. The sealing ring 26 can effectively prevent the gas in the conveying pipeline 1 from exchanging with the outside world, ensuring the stability of the operation. The temperature signal receiver 27 receives the signal transmitted by the micro wireless temperature sensor 13 and transmits the signal to the receiving control unit, which is convenient for the construction personnel to make adjustments.

[0049] It is worth noting that, in this embodiment, considering that the delivery pipeline 1 is a closed space, in order to ensure the effective transmission of the signal of the micro wireless temperature sensor 13, a temperature signal receiver 27 is provided as a signal transfer structure, which facilitates the effective transmission of the signal of the micro wireless temperature sensor 13 to the receiving control unit. In other embodiments of the present invention, other structures can be provided as needed to replace the temperature signal receiver 27, as long as the purpose of the present invention is achieved.

[0050] Further, such as Figure 1 As shown, in this embodiment, the receiving control unit includes at least one receiving controller 28, in which a heat storage receiving control element, a heat release receiving control element and a remote receiving control element are arranged, and the end of the receiving controller 28 is connected to the control circuit 2. The construction personnel can control the opening and closing of the heat storage components and the valve in the heat storage and heat release unit through the heat storage receiving control element in the receiving controller 28, and the construction personnel can control the opening and closing of the heat release components and the valve in the heat storage and heat release unit through the heat release receiving control cabinet element in the receiving controller 28, and can receive the data transmitted by the sensor elements such as temperature and pressure through the remote receiving control element, and control the heat storage and heat release process in real time, with high precision, real-time adjustment and control of the operation of the entire phase change heat storage, which is convenient and fast, with high automation and high construction efficiency.

[0051] It is worth noting that, in this embodiment, Figure 1As shown, the number of receiving controllers 28 is 1. In other embodiments of the present invention, other numbers of receiving controllers 28 can be set according to the length of the conveying pipeline 1 and construction conditions, as long as the purpose of the present invention is achieved.

[0052] Embodiment 2, as Figure 6 As shown, a working method of a pipeline-type phase-change heat storage device with a replaceable heat storage unit, using the pipeline-type phase-change heat storage device with a replaceable heat storage unit in Example 1 to store heat and exchange heat at a user end, includes the following steps:

[0053] S1, start the heat storage program, the heat storage inlet 5 and the heat storage outlet 6 are connected to the heat source end, the construction personnel open the on-off valve 9 of the heat storage inlet 5, the on-off valve 9 of the heat storage outlet 6 and the first connecting valve 3 through the receiving controller 27, close the second connecting valve 4, the low-temperature water in the delivery pipeline 1 continuously enters the heat source end for heat exchange and returns to the delivery pipeline 1, and the high-temperature water after heat exchange exchanges heat with the heat storage heat release unit to store heat in the heat storage heat release unit. Specifically, the low-temperature water in the delivery pipeline 1 flows back to the heat storage outlet 6 through the heat storage outlet 6, the heat source end, the heat storage inlet 5 and the heat storage heat release unit to form a circulation loop, the low-temperature water exchanges heat at the heat source end to form high-temperature water, the high-temperature water exchanges heat with the hollow heat storage unit cage 10 and the capsule phase change heat storage 12 in the delivery pipeline 1, and the heat is stored in the capsule phase change heat storage 12. The data received by the receiving controller 27 reaches the predetermined data, and the heat storage process is completed.

[0054] S2. The construction personnel obtain the heat storage progress according to the receiving controller 28. After the heat storage is completed, the heat release program starts. The heat release inlet 7 and the heat release outlet 8 are connected to the user end. The construction personnel open the on-off valve 9 of the heat release inlet 7, the on-off valve 9 of the heat release outlet 8 and the second connecting valve 4 through the receiving controller 27, and close the first connecting valve 3. The low-temperature water at the user end continuously enters the transmission pipeline 1 and exchanges heat with the heat storage and release unit and then returns to the user end. The high-temperature water after heat exchange is available for use at the user end. Specifically, after the heat storage program is completed, the water in the delivery pipe 1 is drained. When the user needs high-temperature water, the low-temperature water in the user end flows back to the heat release inlet 7 through the heat release inlet 7, the heat storage and heat release unit, the heat release outlet 8 and the user end to form a circulation loop. The low-temperature water exchanges heat with the hollow heat storage unit cage 10 and the capsule phase change heat storage device 12 at the heat storage and heat release unit. During the heat storage process, the heat stored in the hollow heat storage unit cage 10 and the capsule phase change heat storage device 12 is transferred to the low-temperature water, and the low-temperature water is converted into high-temperature water and flows back to the user end for use by the user. The data received by the receiving controller 27 reaches the predetermined data, and the heat storage process is completed.

[0055] S3, heat release is completed, and step S1 and step S2 are circulated. Specifically, after heat release is completed, low-temperature water is added into the delivery pipeline 1, and the heat storage process, i.e. step S1, and the heat release process, i.e. step S2, are continued.

[0056] It is worth noting that, in this embodiment, when heat storage and heat release are not needed, the delivery pipeline 1 can continue to be used normally without affecting normal work, thereby realizing the conversion between the delivery pipeline 1 and the heat storage device.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipeline phase change heat storage device with a replaceable heat storage unit, installed on a conveying pipeline (1) of a heating network, characterized in that: It comprises a receiving control unit, a heat storage and heat release unit, a heat storage and heat release valve assembly and a sensing unit, wherein the receiving control unit is respectively connected to the heat storage and heat release unit, the heat storage and heat release valve assembly and the sensing unit via a control line (2), the heat storage and heat release unit is arranged in a conveying pipeline (1) and the heat storage and heat release unit is connected to the conveying pipeline (1) via a movable connection assembly, the heat storage and heat release valve assembly and the sensing unit are both arranged on the conveying pipeline (1) and the heat storage and heat release valve assembly matches the heat storage and heat release unit; The number of the delivery pipelines (1) is two, and the delivery pipelines (1) are connected via a first connecting valve (3) and a second connecting valve (4) at both ends, and the heat storage and heat release valve assembly is matched with the first connecting valve (3) and the second connecting valve (4) respectively; The heat storage and heat release valve assembly comprises a heat storage inlet (5), a heat storage outlet (6), a heat release inlet (7) and a heat release outlet (8), wherein the heat storage inlet (5) and the heat storage outlet (6) are respectively arranged at the end of the same end of two conveying pipelines (1), the heat storage inlet (5) is matched with the first connecting valve (3) and the second connecting valve (4), the heat storage outlet (6) is matched with the first connecting valve (3) and the second connecting valve (4), and the heat release inlet (7) and the heat release outlet (8) are respectively arranged at the ends of the two conveying pipelines (1). At the end of the same other end of the delivery pipeline (1), the heat release inlet (7) is matched with the first connecting valve (3) and the second connecting valve (4), respectively, and the heat release outlet (8) is matched with the first connecting valve (3) and the second connecting valve (4), respectively, and the heat storage inlet (5), the heat storage outlet (6), the heat release inlet (7) and the heat release outlet (8) are all provided with an on-off valve (9), and the first connecting valve (3), the second connecting valve (4) and the on-off valve (9) are all connected to each other through the control line (2) receiving the control unit; The heat storage inlet (5) and the heat storage outlet (6) are both arranged below the two conveying pipes (1), and the heat release inlet (7) and the heat release outlet (8) are both arranged above the two conveying pipes (1).

2. The pipeline phase-change heat storage device with replaceable heat storage unit according to claim 1 is characterized in that: The heat storage and release unit comprises a plurality of hollow heat storage unit cages (10) and long chain hinge rings (11); the hollow heat storage unit cages (10) are connected to each other via the long chain hinge rings (11); the hollow heat storage unit cages (10) at the ends are connected to the conveying pipeline (1) via a movable connection component; and a phase change heat storage component is arranged in the hollow heat storage unit cage (10).

3. The pipeline phase-change heat storage device with replaceable heat storage unit according to claim 2, characterized in that: The phase-change heat storage component comprises a capsule-type phase-change heat storage device (12) and a miniature wireless temperature sensor (13); a phase-change heat storage medium is arranged in the capsule-type phase-change heat storage device (12); the miniature wireless temperature sensor (13) is arranged on the capsule-type phase-change heat storage device (12); and the miniature wireless temperature sensor (13) is wirelessly connected to a receiving control unit.

4. The pipeline phase-change heat storage device with replaceable heat storage unit according to claim 1, characterized in that: The sensing unit comprises a temperature sensor (14), a pressure sensor (15), a pressure gauge (16) and a thermometer (17); the temperature sensor (14), the pressure sensor (15), the pressure gauge (16) and the thermometer (17) are respectively arranged on the conveying pipeline (1), and the temperature sensor (14), the pressure sensor (15), the pressure gauge (16) and the thermometer (17) are all matched with the flowing working medium in the conveying pipeline (1); and the receiving control unit is respectively connected to the temperature sensor (14) and the pressure sensor (15) via a control line (2).

5. The pipeline phase-change heat storage device with replaceable heat storage unit according to claim 2, characterized in that: The delivery pipeline (1) is provided with a safety valve (18), an air release valve (19) and a water discharge valve (20).

6. The pipeline phase-change heat storage device with replaceable heat storage unit according to claim 3 or 5, characterized in that: The movable connection assembly comprises a replaceable interface (21), a connection fixing plate (22), a long chain fixing ring (23) and a long chain end fixing locking ring (24); the replaceable interface (21) is mounted on the delivery pipeline (1) and the replaceable interface (21) is in communication with the delivery pipeline (1); the connection fixing plate (22) is connected to the replaceable interface (21) via a bolt (25) and a sealing ring (26); a temperature signal receiver (27) is mounted on the upper end of the connection fixing plate (22); the temperature signal receiver (27) is connected to a receiving control unit via a control circuit (2); the long chain fixing ring (23) is fixedly arranged at the lower end of the connection fixing plate (22); and the hollow heat storage unit cage (10) is movably connected to the long chain fixing ring (23) via the long chain end fixing locking ring (24).

7. The pipeline phase-change heat storage device with replaceable heat storage unit according to claim 6, characterized in that: The receiving control unit comprises at least one receiving controller (28), an end of which is connected to a control line (2).

8. A method for operating a pipeline phase-change heat storage device with replaceable heat storage units, characterized in that: Using the replaceable pipeline phase-change heat storage device of any one of claims 1 to 7 to store heat and exchange heat at the user end comprises the following steps: S1. Start the heat storage procedure. The heat storage inlet (5) and the heat storage outlet (6) are connected to the heat source end. The construction personnel open the on-off valve (9) of the heat storage inlet (5), the on-off valve (9) of the heat storage outlet (6) and the first connecting valve (3) through the receiving controller (28), and close the second connecting valve (4). The low-temperature water in the delivery pipeline (1) continuously enters the heat source end for heat exchange and then returns to the delivery pipeline (1). The high-temperature water after heat exchange exchanges heat with the heat storage heat release unit, and the heat is stored in the heat storage heat release unit; S2, the construction personnel obtain the heat storage progress according to the receiving controller (28), and after the heat storage is completed, the heat release procedure begins, the heat release inlet (7) and the heat release outlet (8) are connected to the user end, the construction personnel open the on-off valve (9) of the heat release inlet (7), the on-off valve (9) of the heat release outlet (8) and the second connecting valve (4) through the receiving controller (28), and close the first connecting valve (3), the low-temperature water at the user end continuously enters the transmission pipeline (1) and exchanges heat with the heat storage and heat release unit and then returns to the user end, and the high-temperature water after heat exchange is available for use at the user end; S3, heat release is completed, and steps S1 and S2 are repeated in a cycle.

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