A unilateral pipe network constant pressure internal circulation device

Abstract

The utility model relates to a kind of unilateral pipe network constant-pressure internal circulation equipment, including pressure tank, liquid outlet pipeline, back liquid pipeline, liquid supplement pipeline and control cabinet, the liquid outlet of pressure tank is connected with equipment liquid outlet pipeline, back liquid port is connected with equipment back liquid pipeline, circulating pump assembly, flowmeter and safety valve are installed on liquid outlet pipeline, back liquid valve and pressure sensor are installed on back liquid pipeline, the liquid supplement port of pressure tank is connected with liquid supplement pipeline and drainage pipeline respectively by pipeline, booster pump assembly is installed on liquid supplement pipeline, drainage valve is installed on drainage pipeline, automatic exhaust valve and liquid level sensor are installed on pressure tank, control cabinet is connected with circulating pump assembly, booster pump assembly, automatic exhaust valve, liquid level sensor, pressure sensor and flowmeter. The present application provides an effective constant-pressure internal circulation equipment. Pipe network can be realized stable operation under set pressure and flow.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger equipment, specifically a single-sided pipeline constant pressure internal circulation device. Background Technology

[0002] The pressure resistance and heat transfer efficiency of plate heat exchangers are important performance indicators. After the design of a new heat exchanger is completed, its pressure resistance and heat transfer efficiency are usually tested on a test platform. The heat transfer efficiency test aims to verify whether its heat transfer performance meets the standards, while the pressure resistance test evaluates the stability of the structure under pressure. The test process requires maintaining one side of the flow channel within the heat exchanger under a specific pressure for several hours to several days.

[0003] To achieve the above objectives, the inlet and outlet of one side of the heat exchanger's flow channel are currently connected to the inlet and outlet of the experimental platform. However, the experimental platform lacks pressure control equipment and relies entirely on a water pump for adjustment, resulting in unstable pressure. Furthermore, manually adjusting the valve opening cannot achieve highly precise pressure settings. Therefore, providing a device that can ensure stable internal circulation of fluid within a single-sided pipe network under a specific pressure is a major problem that needs to be solved in this industry. Utility Model Content

[0004] The purpose of this invention is to provide a single-sided pipeline network constant pressure internal circulation device, which can realize automatic constant pressure internal circulation of fluid in a single-sided pipeline network under a set pressure.

[0005] The technical solution of this utility model:

[0006] A single-sided pipeline network pressure-regulating internal circulation device includes a pressure stabilizing tank, an outlet pipeline, a return pipeline, a replenishment pipeline, and a control cabinet. The outlet of the pressure stabilizing tank is connected to the equipment's outlet pipeline, and the return pipeline is connected to the equipment's return pipeline. A circulation pump assembly, a flow meter, and a safety valve are installed on the outlet pipeline. A return valve and a pressure sensor are installed on the return pipeline. The replenishment port of the pressure stabilizing tank is connected to the replenishment pipeline and the drain pipeline respectively. A booster pump assembly is installed on the replenishment pipeline, and a drain valve is installed on the drain pipeline. An automatic vent valve and a level sensor are installed on the pressure stabilizing tank. The control cabinet is connected to the circulation pump assembly, the booster pump assembly, the automatic vent valve, the level sensor, the pressure sensor, and the flow meter.

[0007] The beneficial effects of this utility model are:

[0008] 1. This application provides an effective constant-pressure internal circulation device. It can achieve stable operation of the pipeline network under set pressure and flow rate.

[0009] 2. The equipment described in this application is a modern device capable of long-term stable automatic operation and control through reasonable component selection, pipeline design, and operating mode. This application can eliminate the interference of pressure fluctuations on heat exchange efficiency testing by stabilizing unilateral pressure, while accurately simulating the pressure environment under actual working conditions, ensuring the accuracy and reliability of test data for heat exchange efficiency and pressure resistance. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the process flow of the single-sided pipeline constant pressure internal circulation equipment in this application.

[0012] Figure 2 This is a schematic diagram of the overall structure of the single-sided pipeline constant pressure internal circulation equipment of this application.

[0013] Figure label:

[0014] 1. Pressure stabilizing tank; 2. Discharge line; 3. Return line; 4. Makeup line; 5. Control cabinet; 6. Flow meter; 7. Safety valve; 8. Return valve; 9. Pressure sensor; 11. Drain line; 12. Drain valve; 13. Automatic vent valve; 14. Level sensor; 15. Circulation pump inlet valve; 16. Flexible connection; 17. Circulation pump; 18. Check valve; 19. Circulation pump outlet valve; 20. Bypass check valve; 21. Filter; 22. Booster pump inlet valve; 23. Booster pump; 24. Booster pump outlet valve. Detailed Implementation

[0015] To address the problems in the background technology and achieve constant-pressure internal circulation in a single-sided pipe network of a heat exchanger unit, this invention relates to a single-sided pipe network constant-pressure internal circulation device. The device enables constant-pressure internal circulation of fluid within a single-sided pipe network of the heat exchanger unit at a preset pressure, and can operate automatically and stably for extended periods under the control of a control cabinet.

[0016] It should be noted that in the description of this application, terms such as "inner", "outer", "upper", and "lower" that indicate direction or positional relationship are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] Besides its application in the testing phase of novel heat exchangers, the equipment described in this application can also be used in heat exchange units. Some heat exchange units require the fluid in one side of the piping network to operate stably under a specific pressure for an extended period, providing a stable heat source for the fluid in the other side of the piping network. For example, in an ORC waste heat generator set, the cold-side piping network of the condenser section needs to achieve constant-pressure internal circulation between the cold side of the heat exchanger and the air cooler to continuously carry the heat from the working fluid into the air, achieving cooling and condensation of the working fluid.

[0019] This application discloses a single-sided pipeline network pressure-regulating internal circulation device, comprising a pressure stabilizing tank 1, an outlet pipeline 2, a return pipeline 3, a replenishment pipeline 4, and a control cabinet 5. The outlet of the pressure stabilizing tank 1 is connected to the outlet pipeline 2, and the return pipeline 1 is connected to the return pipeline 3. A circulation pump assembly, a flow meter 6, and a safety valve 7 are installed on the outlet pipeline 2. A return valve 8 and a pressure sensor 9 are installed on the return pipeline 3. The replenishment port of the pressure stabilizing tank 1 is connected to a replenishment pipeline 10 and a drain pipeline 11 via pipelines. A booster pump assembly is installed on the replenishment pipeline 10, and a drain valve 12 is installed on the drain pipeline 11. An automatic vent valve 13 and a level sensor 14 are installed on the pressure stabilizing tank 1. The control cabinet 5 is connected to the circulation pump assembly, the booster pump assembly, the automatic vent valve 13, the level sensor 14, the pressure sensor 9, and the flow meter 6.

[0020] The circulating pump assembly includes, in sequence, a circulating pump inlet valve 15, a flexible connection 16, a circulating pump 17, a check valve 18, and a circulating pump outlet valve 19. A branch passage is provided at the circulating pump assembly in the liquid outlet pipeline, and a bypass check valve 20 is connected to the branch passage. The booster pump assembly includes, in sequence, a filter 21, a booster pump inlet valve 22, a booster pump 23, a check valve 18, and a booster pump outlet valve 24.

[0021] The control cabinet 5 is connected to the flow meter 6, the liquid level sensor 14 and the pressure sensor 9 via signal cables, and is also connected to the circulating pump 17, the booster pump 23 and the automatic exhaust valve 13 via control cables.

[0022] This application's single-sided pipeline constant pressure internal circulation equipment, through reasonable component selection, pipeline design, and operation mode, can achieve stable operation of the pipeline network under set pressure and flow rate. It is a modern device that can operate and be controlled automatically and stably for a long time.

[0023] like Figure 1-2 As shown, a specific embodiment of the single-sided pipeline constant pressure internal circulation device of this application is as follows:

[0024] The single-sided pipeline constant pressure internal circulation equipment of this application includes a pressure stabilizing tank 1, a return valve 8, a circulation pump inlet valve 15, a flexible connection 16, a circulation pump 17, a check valve 18, a circulation pump outlet valve 19, a flow meter 6, a safety valve 7, a bypass check valve 20, a filter 21, a booster pump inlet valve 22, a booster pump 23, a check valve 18, a booster pump outlet valve 21, a drain valve 12, a control cabinet 5, an automatic air vent valve 13, a liquid level sensor 14, and a pressure sensor 9.

[0025] The pressure stabilizing tank's return port is connected to a return valve via a return pipeline. The pressure stabilizing tank's replenishment port (which also serves as a drain port) is connected to a drain pipeline equipped with a drain valve. The pressure stabilizing tank's vent is connected to an automatic vent valve. A level sensor is connected to the pressure stabilizing tank's level sensor interface. A pressure sensor is connected to the pressure stabilizing tank's return pipeline. The pressure stabilizing tank's replenishment port is connected to a replenishment pipeline, which includes a booster pump outlet valve, a check valve, the booster pump, a booster pump inlet valve, and a filter. The pressure stabilizing tank's outlet is connected to an outlet pipeline, which includes a circulation pump inlet valve, a flexible connection, the circulation pump, a check valve, and a circulation pump outlet valve. A bypass check valve is installed on a branch of the outlet pipeline. A flow meter and a safety valve are installed on the circulation pump outlet side of the outlet pipeline.

[0026] The equipment is equipped with a control cabinet, which is connected to the flow meter, level sensor, and pressure sensor via signal cables. The control cabinet is also connected to the circulation pump, booster pump, and automatic air vent valve via control cables.

[0027] The working process of the single-sided pipeline constant pressure internal circulation equipment in this application is as follows:

[0028] Before operating the equipment, connect the equipment's replenishment pipeline to the replenishment liquid source, connect the equipment's outlet pipeline to the inlet of the heat exchanger under test, and connect the equipment's return pipeline to the outlet of the heat exchanger under test.

[0029] Before and during equipment operation, the return valve, circulating pump inlet valve, circulating pump outlet valve, booster pump outlet valve, and booster pump inlet valve should be kept open, while the drain valve should be kept closed. Before operation, the operating pressure and flow rate of the equipment should be set in the control system.

[0030] The equipment starts operating. The booster pump, under the control of the control cabinet, starts to fill the equipment and piping network with liquid. Simultaneously, the automatic vent valve opens under the control of the control cabinet to vent air from the system. When the liquid level in the pressure tank exceeds the preset minimum liquid level, the circulation pump starts under the control of the control cabinet to ensure that all air in the entire piping system is purged and the system is filled with liquid. When the liquid level in the pressure tank reaches the maximum value, the automatic vent valve closes under the control of the control cabinet. The booster pump and circulation pump continue to run, pressurizing the liquid in the system. When the system pressure reaches the set value, the booster pump stops operating under the control of the control cabinet. The equipment enters the working state.

[0031] During equipment operation, the control cabinet controls the operating frequency of the circulating pump based on the flow signal fed back from the flow meter; the control cabinet also controls the booster pump to pressurize the system or controls the automatic exhaust valve to open and depressurize the system based on the pressure signal fed back from the pressure sensor. Under the control of the control system, the equipment operates stably at the set flow and pressure.

[0032] After the equipment has finished operating, the booster pump and circulation pump stop running, and the automatic exhaust valve opens under the control of the control cabinet, allowing the high-pressure liquid to be discharged and the liquid pressure in the system to gradually decrease. When the liquid pressure in the system drops below the safe value, the liquid in the system can be drained by manually opening the drain valve, and then the equipment can be disconnected from the heat exchanger and the makeup liquid source.

[0033] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art, inspired by this description, design similar structures and implementations to the above embodiments without departing from the technical essence of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A single-sided pipeline network constant pressure internal circulation device, characterized in that: The system includes a pressure stabilizing tank, an outlet pipeline, a return pipeline, a replenishment pipeline, and a control cabinet. The outlet of the pressure stabilizing tank is connected to the equipment's outlet pipeline, and the return pipeline is connected to the equipment's return pipeline. A circulation pump assembly, a flow meter, and a safety valve are installed on the outlet pipeline, and a return valve and a pressure sensor are installed on the return pipeline. The replenishment port of the pressure stabilizing tank is connected to the replenishment pipeline and the drain pipeline respectively. A booster pump assembly is installed on the replenishment pipeline, and a drain valve is installed on the drain pipeline. An automatic vent valve and a level sensor are installed on the pressure stabilizing tank. The control cabinet is connected to the circulation pump assembly, the booster pump assembly, the automatic vent valve, the level sensor, the pressure sensor, and the flow meter.

2. The single-sided pipeline constant pressure internal circulation device according to claim 1, characterized in that: The circulating pump assembly includes, in sequence, a circulating pump inlet valve, a flexible connection, a circulating pump, a flexible connection, a check valve, and a circulating pump outlet valve. A branch passage is provided at the circulating pump assembly in the liquid outlet pipeline, and a bypass check valve is connected to the branch passage. The booster pump assembly includes, in sequence, a filter, a booster pump inlet valve, a booster pump, a check valve, and a booster pump outlet valve.

3. The single-sided pipeline constant pressure internal circulation device according to claim 2, characterized in that: The control cabinet is connected to the flow meter, level sensor and pressure sensor via signal cables, and is also connected to the circulation pump, booster pump and automatic exhaust valve via control cables.

Images