A leakage-proof structure for heating and heat exchange ammonia supplement
By combining internal and external pipes and using ammonia sensors for monitoring, the problem of leakage caused by loose pipe connections during ammonia replenishment in the heating heat exchanger was solved, achieving reliable sealing and leakage handling, and ensuring system stability and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI SHUANGLIANG NEW ENERGY THERMAL POWER ENG DESIGN CO LTD
- Filing Date
- 2025-08-06
- Publication Date
- 2026-07-24
AI Technical Summary
In the process of replenishing ammonia, existing heating heat exchangers lack effective buffering and compensation measures at the pipeline connection points. This can easily lead to loose connections due to equipment vibration and thermal expansion, resulting in poor sealing or jamming of solenoid valves, making it difficult to reliably prevent ammonia leakage in the long term.
The system adopts a combination structure of inner and outer tubes. The inner tube is connected to the heat exchanger through a sealing gasket, while the outer tube is equipped with a corrugated pipe and flange to enhance the flexible connection. An ammonia sensor is installed on the top of the outer tube to monitor leaks in real time. The collector absorber is equipped with a filter plate and a water pump atomizing nozzle to treat leaked ammonia. The liquid collection box monitors the liquid level.
It effectively prevents ammonia leakage, ensures stable system operation, promptly detects and handles leaks, reduces environmental and personnel hazards, and improves sealing reliability.
Smart Images
Figure CN224552191U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchanger technology for heating, specifically a leak-proof structure for ammonia replenishment in a heating heat exchanger. Background Technology
[0002] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid. During operation, liquid ammonia needs to be replenished to the heat exchanger. As the system runs, the amount of liquid ammonia may decrease due to leaks, losses, or other reasons, affecting the normal operation and heat exchange efficiency of the heat exchanger. Therefore, it is necessary to replenish liquid ammonia into the refrigerant channel periodically or according to the system's operating conditions to ensure that there is sufficient refrigerant in the system for heat exchange.
[0003] For example, patent CN217541161U discloses an ammonia replenishment device for a heat exchanger, including a liquid ammonia storage tank. Liquid ammonia is pumped into the refrigerant channel via a liquid ammonia pump. When the liquid ammonia level in the storage tank decreases, a solenoid valve on the second connecting pipe opens, transferring liquid ammonia from a cylinder into the storage tank. Simultaneously, an ammonia collection tank prevents leakage. The ammonia is mixed with water, collected, and converted into ammonia water, which is then sent to an ammonia water pool via an eighth connecting pipe. This design is simple, easy to operate, and ensures no ammonia leakage, avoiding harm to health and environmental pollution. However, the aforementioned case primarily relies on solenoid valves to control the pipe flow to prevent leakage, lacking effective buffering and compensation measures at the pipe connections. Under conditions of equipment vibration and thermal expansion, the connections are prone to loosening, and the solenoid valves themselves are susceptible to sealing defects and jamming, making it difficult to guarantee a long-term reliable seal.
[0004] To address the aforementioned issues, there is an urgent need for innovative design based on the existing leak-proof structure for ammonia replenishment in heating heat exchangers. Utility Model Content
[0005] The purpose of this utility model is to provide a leak-proof structure for ammonia replenishment in a heating heat exchanger, in order to solve the problem mentioned in the background art that the pipeline connection parts lack effective buffering and compensation measures, and that the connection parts are prone to loosening under equipment vibration, thermal expansion and other conditions. The solenoid valve itself also has the risk of failure such as poor sealing and jamming, making it difficult to ensure a long-term reliable sealing effect.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof structure for ammonia replenishment in a heating heat exchanger, comprising a heat exchanger body, with an inlet and a outlet respectively provided at both ends of the heat exchanger body; the heat exchanger body is fixed to a base plate by a bracket, and a collector is installed on one side of the top of the base plate by a support leg; an ammonia inlet is provided on one side of the heat exchanger body, and an inner pipe is fixedly connected to the ammonia inlet of the heat exchanger body by a sealing gasket; an outer pipe is sleeved on the outer wall of the inner pipe; and a leak-proof mechanism is provided on the outer pipe to prevent leakage from the ammonia inlet of the heat exchanger body.
[0007] Furthermore, the leak prevention mechanism includes two first flanges, which are respectively fixedly connected to the outer wall of the outer tube heat exchanger body. A bellows is provided on one side of the first flange, and a second flange is installed at both ends of the bellows. The second flange on one side is fixedly connected to the first flange on the same side, and the second flange on the other side is fixedly connected to one side of the heat exchanger body. A first sealing gasket is provided between one side of the second flange and the ammonia inlet of the heat exchanger body.
[0008] Furthermore, a drain pipe is provided on one side of the inner tube, an ammonia sensor is installed on the top of the outer tube, and the end of the outer tube away from the heat exchanger body is connected to an ammonia storage device.
[0009] Furthermore, the collector is equipped with a collection mechanism for collecting liquid ammonia. The collection mechanism includes a partition plate located inside the collector. A pull-out drawer is slidably connected to one side of the collector. A filter plate is installed inside the pull-out drawer. Magnetic blocks are installed at both ends of one side of the collector. An iron block is installed on the side of the pull-out drawer closest to the collector.
[0010] Furthermore, a water pump is installed on one side of the collector via a fixing plate. A suction pipe is installed at the suction end of the water pump, and a spray pipe is connected to the discharge end of the water pump. One end of the spray pipe is fixedly connected to the inner top wall of the collector via a support plate, and four sets of atomizing nozzles are provided at the bottom of the spray pipe.
[0011] Furthermore, a liquid collection box is installed inside the collector, a liquid level sensor is installed on one side of the liquid collection box, and one end of the suction tube is connected to the inside of the liquid collection box.
[0012] Compared with the prior art, the beneficial effects of this utility model are: This ammonia replenishment leak-proof structure for the heating heat exchanger features an inner tube tightly connected to the ammonia inlet of the heat exchanger via a sealing gasket, filling any tiny gaps at the connection point and effectively preventing ammonia leakage under pressure. The bellows is connected to the outer tube and heat exchanger via flanges at both ends, with a first sealing gasket at the connection surface further enhancing the sealing effect. When the pipeline shifts due to temperature changes, vibration, or other factors, the bellows can freely expand and contract, avoiding seal damage caused by rigid connections. This significantly reduces the risk of ammonia leakage, ensures stable system operation, and allows for timely detection of leaks even if the solenoid valve malfunctions.
[0013] Furthermore, the ammonia sensor installed at the top of the outer pipe can monitor the ammonia leakage in the outer pipe in real time. Once the ammonia concentration exceeds the threshold, an alarm signal will be issued immediately, and staff can take timely measures such as checking pipe connections and closing valves to prevent further ammonia leakage. The leaked ammonia is effectively treated by the collection and absorption device. After entering the collection and absorption device, the ammonia is first filtered by a filter plate to remove impurities, effectively reducing the concentration of ammonia in the collection and absorption device and reducing the harm of ammonia to the environment and personnel.
[0014] Furthermore, the drainage pipe allows for timely discharge of accumulated liquid. By opening the valve, the accumulated liquid can be discharged into the collection absorber through the drainage pipe. At the same time, a liquid level sensor is installed on one side of the collection box inside the collection absorber, which can monitor the liquid level of the absorbent in real time, allowing staff to keep track of the use of the absorbent and replenish or treat it in a timely manner. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.
[0016] Figure 2 This is a partial three-dimensional structural diagram of the present invention.
[0017] Figure 3 This is a partial three-dimensional structural diagram of the collector and absorber of this utility model.
[0018] Figure 4 This is a partial cross-sectional three-dimensional structural diagram of the collector and absorber of this utility model.
[0019] Figure 5 This is a partially exploded three-dimensional structural diagram of the collector and absorber of this utility model.
[0020] Figure 6 This is a partial three-dimensional structural diagram of the outer tube of this utility model.
[0021] In the diagram: 1. Heat exchanger body; 2. Liquid inlet; 3. Liquid outlet; 4. Collector; 5. Inner pipe; 6. Outer pipe; 7. Second flange; 8. First flange; 9. Bellows; 10. Ammonia sensor; 11. Drain pipe; 12. Drawer; 13. Filter plate; 14. Magnetic block; 15. Water pump; 16. Spray pipe; 17. Divider plate; 18. Liquid collection box; 19. Suction pipe; 20. Atomizing nozzle; 21. Liquid level sensor; 22. Base plate. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, Example 1: Please refer to Figure 1 , Figure 2 and Figure 6 This utility model provides the following technical solution: a leak-proof structure for ammonia replenishment in a heating heat exchanger, comprising a heat exchanger body 1, with an inlet 2 and a outlet 3 respectively provided at both ends of the heat exchanger body 1. The heat exchanger body 1 is fixed to a base plate 22 by a bracket, and a collector 4 is installed on one side of the top of the base plate 22 via a support leg; an ammonia inlet is provided on one side of the heat exchanger body 1, and an inner tube 5 is fixedly connected to the ammonia inlet of the heat exchanger body 1 by a sealing gasket, with an outer tube 6 sleeved on the outer wall of the inner tube 5; a leak-proof mechanism for preventing leakage from the ammonia inlet of the heat exchanger body 1 is provided on the outer tube 6; the leak-proof mechanism includes two... Two first flanges 8 are fixedly connected to the outer wall of the heat exchanger body 1 of the outer tube 6. A bellows 9 is provided on one side of the first flange 8. A second flange 7 is installed at both ends of the bellows 9. The second flange 7 on one side is fixedly connected to the first flange 8 on the other side. The second flange 7 on the other side is fixedly connected to one side of the heat exchanger body 1. A first sealing gasket is provided between one side of the second flange 7 and the ammonia inlet of the heat exchanger body 1. A drain pipe 11 is provided through one side of the inner tube 5. An ammonia sensor 10 is installed on the top of the outer tube 6. The ends of the outer tube 6 and the inner tube 5 away from the heat exchanger body 1 are connected to the ammonia storage equipment.
[0024] When using the device, such as Figure 1 and Figure 2As shown, firstly, the inner tube 5 is connected to the ammonia inlet of the heat exchanger body 1. The ammonia inlet of the heat exchanger body 1 is tightly connected to the inner tube 5 by a sealing gasket. The sealing gasket fills the tiny gaps at the connection between the ammonia inlet and the inner tube 5, preventing ammonia gas from leaking from these gaps under pressure. Since the outer tube 6 is fitted onto the outer wall of the inner tube 5, the outer tube 6 provides additional protection, such as... Figure 2 and Figure 6 As shown, since the two first flanges 8 are respectively fixed to the outer wall of the outer tube 6 and the heat exchanger body 1, the bellows 9 on one side of the first flange 8 is connected to the first flange 8 and the heat exchanger body 1 through the second flanges 7 at both ends. By fixing one end of the bellows 9 to the heat exchanger body 1 through the second flange 7, the bellows 9 has good flexibility and extensibility. During the connection process, the second flange 7 and the first flange 8 are fastened with bolts, and a first sealing gasket is set between the connection surfaces to further enhance the sealing effect. Figure 2 and Figure 6 As shown, when the pipeline shifts, the bellows 9 can freely expand and contract, avoiding seal damage caused by rigid connections. An ammonia sensor 10 is installed at the top of the outer pipe 6. Figure 2 and Figure 6 As shown, when there is ammonia leakage in the outer pipe 6, the ammonia molecules will react chemically with the sensitive material inside the sensor, generating a change in electrical signal. Once the ammonia concentration exceeds the threshold, the sensor will immediately issue an alarm signal to notify the staff to take corresponding measures, such as checking the pipe connection and closing the valve. During the ammonia replenishment process, due to temperature changes and impurities carried in the ammonia, liquid may accumulate in the inner pipe 5, which will be discharged through the drain pipe 11.
[0025] Example 2: Please refer to Figure 3 , Figure 4 and Figure 5 Based on Embodiment 1, a collection mechanism is also disclosed, the specific structure of which is as follows: The collection mechanism includes a partition plate 17, which is disposed inside the collector 4. A pull-out drawer 12 is slidably connected to one side of the collector 4. A filter plate 13 is installed inside the pull-out drawer 12. Magnetic blocks 14 are installed at both ends of one side of the collector 4. An iron block is installed on the side of the pull-out drawer 12 near the collector 4. A water pump 15 is installed on one side of the collector 4 via a fixing plate. A suction pipe 19 is installed at the suction end of the water pump 15. A spray pipe 16 is connected to the discharge end of the water pump 15. One end of the spray pipe 16 is fixedly connected to the inner top wall of the collector 4 via a support plate. Four sets of atomizing nozzles 20 are provided at the bottom of the spray pipe 16. A liquid collection box 18 is installed inside the collector 4. A liquid level sensor 21 is installed on one side of the liquid collection box 18. One end of the suction pipe 19 is connected to the inside of the liquid collection box 18.
[0026] When drainage is required, such as Figure 3 and Figure 4 As shown, when the valve is opened, the accumulated liquid is discharged through the drain pipe 11. Since one end of the drain pipe 11 is connected to the collecting absorber 4, the drain pipe 11 will discharge the accumulated liquid into the collecting absorber 4, as shown. Figure 4 and Figure 5 As shown, when leaked ammonia gas enters the collector 4, it first passes through the filter plate 13. Since magnetic blocks 14 are installed at both ends of one side of the collector 4, and an iron block is installed on the side of the drawer 12 closest to the collector 4, the drawer 12 is tightly connected to the collector 4 through the attraction between the magnetic blocks 14 and the iron block. This connection also facilitates disassembly and cleaning. Figure 3 and Figure 4 As shown, when the filter plate 13 is saturated or needs to be replaced, the operator can easily pull out the drawer 12 for processing. The ammonia gas filtered through the filter plate 13 will rise upwards. Figure 4 and Figure 5 As shown, since the partition plate 17 inside the collector 4 divides the space inside the collector 4 into a collection chamber and an absorption chamber, the ammonia gas passes through the filter plate 13 in the collection chamber, passes through the partition plate 17, and rises into the interior of the absorption chamber, as shown. Figure 4 and Figure 5 As shown, since a liquid collection box 18 is installed inside the collector 4, and a water pump 15 is installed on one side of the collector 4 via a fixing plate, the water pump 15 can be started to deliver the absorbent liquid to the spray pipe 16. The four sets of atomizing nozzles 20 at the bottom of the spray pipe 16 atomize the absorbent liquid into fine droplets and spray them inside the collector 4, so that the atomized absorbent liquid comes into full contact with the leaked ammonia gas. The ammonia gas reacts with the absorbent liquid and is absorbed by the absorbent liquid, thereby reducing the concentration of ammonia gas in the collector 4. Meanwhile, the liquid level sensor 21 on one side of the liquid collection box 18 monitors the liquid level of the absorbent liquid in the liquid collection box 18 in real time.
[0027] The terms "connected" and "linked" 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 mechanical connection or an electrical 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 these terms in this utility model based on the specific circumstances.
[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A leak-proof structure for ammonia replenishment in a heating heat exchanger, comprising a heat exchanger body (1), characterized in that: The heat exchanger body (1) is provided with an inlet (2) and an outlet (3) at both ends. The heat exchanger body (1) is fixed to the base plate (22) by a bracket. A collector (4) is installed on one side of the top of the base plate (22) by a support leg. Ammonia inlet is provided on one side of the heat exchanger body (1). An inner pipe (5) is fixedly connected to the ammonia inlet of the heat exchanger body (1) by a sealing gasket. An outer pipe (6) is sleeved on the outer wall of the inner pipe (5). The outer tube (6) is equipped with a leak prevention mechanism to prevent leakage of ammonia from the inlet of the heat exchanger body (1).
2. The leak-proof structure for ammonia replenishment in a heat exchanger according to claim 1, characterized in that: The leak prevention mechanism includes two first flanges (8), which are fixedly connected to the outer wall of the heat exchanger body (1) of the outer tube (6). A bellows (9) is provided on one side of the first flange (8), and a second flange (7) is installed at both ends of the bellows (9). The second flange (7) on one side is fixedly connected to the first flange (8) on one side, and the second flange (7) on the other side is fixedly connected to one side of the heat exchanger body (1). A first sealing gasket is provided between one side of the second flange (7) and the ammonia inlet of the heat exchanger body (1).
3. The leak-proof structure for ammonia replenishment in a heat exchanger according to claim 1, characterized in that: A drain pipe (11) is installed on one side of the inner pipe (5), and an ammonia sensor (10) is installed on the top of the outer pipe (6). The outer pipe (6) and the end of the inner pipe (5) away from the heat exchanger body (1) are connected to the ammonia storage device.
4. The leak-proof structure for ammonia replenishment in a heat exchanger according to claim 1, characterized in that: The collector (4) is equipped with a collection mechanism for collecting liquid ammonia. The collection mechanism includes a partition plate (17) which is located inside the collector (4). A drawer (12) is slidably connected to one side of the collector (4). A filter plate (13) is installed inside the drawer (12). Magnetic blocks (14) are installed at both ends of one side of the collector (4). An iron block is installed on the side of the drawer (12) near the collector (4).
5. The leak-proof structure for ammonia replenishment in a heat exchanger according to claim 4, characterized in that: A water pump (15) is installed on one side of the collector (4) via a fixing plate. A suction pipe (19) is installed at the suction end of the water pump (15). A spray pipe (16) is connected to the discharge end of the water pump (15). One end of the spray pipe (16) is fixedly connected to the inner top wall of the collector (4) via a support plate. Four sets of atomizing nozzles (20) are provided at the bottom of the spray pipe (16).
6. The leak-proof structure for ammonia replenishment in a heat exchanger according to claim 5, characterized in that: The collector (4) has a liquid collection box (18) installed inside. A liquid level sensor (21) is installed on one side of the liquid collection box (18). One end of the suction tube (19) is connected to the inside of the liquid collection box (18).