A heat exchanger cleaning and plugging device

Abstract

The utility model provides a kind of heat exchanger cleaning and plugging device, including air bag, flange blanking plate and rigid air pipe, the air tap of air bag is equipped with first air pipe interface, the outside of flange blanking plate is equipped with inflation interface and cleaning interface, the inside of flange blanking plate is equipped with second air pipe interface, the inflation interface is communicated the second air pipe interface, the both ends of rigid air pipe can be respectively connected and communicated in the first air pipe interface and the second air pipe interface. The present application completes pipeline plugging by air bag, the putting, pulling, supporting and inflation of air bag are completed by rigid pipeline, the rigid pipeline is fixed by flange blanking plate and connected cleaning equipment, and the plugging and cleaning of heat exchanger with large pipe diameter and without isolation valve in inlet / outlet water pipeline can be effectively completed.

Description

Technical Field

[0001] This utility model relates to the field of pipeline plugging, specifically to a heat exchanger cleaning and plugging device. Background Technology

[0002] Heat exchangers, as key equipment for heat exchange in industrial fields such as nuclear power, thermal power, urban heating, and chemical industry, primarily function to cool high-temperature media systems with cooling water, thereby ensuring the continuous, stable, and efficient operation of the equipment. Maintaining the cleanliness of the heat exchanger's internal components helps reduce temperature differences, improve heat transfer efficiency, reduce system energy consumption, and further save plant electricity, ultimately ensuring the safe and reliable operation of the entire cooling system. Currently, common cleaning methods mainly include traditional manual cleaning and electromagnetic pulse cleaning. Manual cleaning requires a large investment of manpower, involving a certain degree of disassembly of the heat exchange mechanism for cleaning. This is not only labor-intensive and inefficient but also prone to water pollution and equipment damage. In contrast, electromagnetic pulse cleaning technology can achieve efficient cleaning without disassembling the heat exchanger, gradually becoming a more environmentally friendly and economical cleaning option.

[0003] However, cleaning large heat exchangers often presents challenges due to the unique structural limitations of their inlet and outlet water pipes. These heat exchangers typically have large diameter inlet and outlet pipes, reaching DN500 or even higher, and are quite long. Because there are no isolation valves between the pipes and the heat exchanger body, and the pipes themselves are difficult to disassemble, when cleaning equipment is connected to the maintenance window, the cleaning medium tends to flow preferentially into the inlet and outlet water pipes rather than through the heat exchange elements, making effective cleaning difficult.

[0004] Therefore, there is currently a lack of mature and reliable sealing devices for heat exchangers with large-diameter inlet / outlet water pipes without isolation valves, making the cleaning of such heat exchangers quite difficult.

[0005] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a heat exchanger cleaning and sealing device. This device uses an airbag, a rigid pipe, and a flange plug to place and fix the airbag, effectively sealing and cleaning heat exchangers with large-diameter inlet / outlet water pipes that do not have isolation valves.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: it includes an airbag, a flange plug, and a rigid air tube. The airbag has a first air tube interface on its nozzle. The flange plug has an inflation interface and a cleaning interface on its outer side. The flange plug has a second air tube interface on its inner side. The inflation interface is connected to the second air tube interface. The two ends of the rigid air tube can be connected to the first air tube interface and the second air tube interface, respectively.

[0008] In this application, the airbag can be positioned by connecting the rigid air pipe and the first air pipe interface. The airbag can be pulled and supported by the flange plug by connecting the rigid air pipe and the air nozzle and inflation interface. The airbag can be inflated / deflated by connecting the rigid air pipe and the air nozzle and inflation interface. The cleaning interface can be used for cleaning. Therefore, when the sealing device in this application is applied to a heat exchanger with a large diameter inlet / outlet water pipe without isolation valve, the inlet / outlet water pipe can be effectively sealed to complete the cleaning operation of the heat exchanger.

[0009] Based on the above, the flange plug is configured as an eccentric flange, and the cleaning interface is eccentrically positioned on the flange plug.

[0010] The eccentrically designed cleaning port facilitates the discharge of cleaning media from the cleaning port, preventing the deposition of solid particles.

[0011] Based on the above, the airbag is configured as a conical cylinder, the air nozzle is located at the apex of the conical head of the airbag, and the first air pipe interface is located at the center of the bolt hole distribution circle of the flange plug.

[0012] The conical cylindrical airbag effectively seals the blockage and resists the flushing from the cleaning medium. Meanwhile, the two ends of the rigid air tube are connected to the center of the airbag and the center of the flange plug, respectively, making the airbag, flange plug, and rigid air tube coaxial and enhancing the tensile and support strength of the rigid air tube for the airbag.

[0013] Based on the above, the sealing device also includes a pull rope, with a first pull rope ring on the airbag and a second pull rope ring on the inner side of the flange blocking plate. The two ends of the pull rope can be connected to the first pull rope ring and the second pull rope ring, respectively.

[0014] By pulling the rope, the pulling force on the airbag can be enhanced, preventing the connection between the rigid air tube and the airbag from failing.

[0015] Based on the above, the pull cords are evenly distributed around the circumference of the rigid air tube to generate a balanced pulling force on the airbag.

[0016] Based on the above, the sealing device further includes a liner for allowing the airbag to pass through the liner to protect the passage of the airbag.

[0017] Based on the above, the first tracheal interface and the second tracheal interface adopt flange interfaces, and the two ends of the rigid tracheal tube are provided with corresponding flanges.

[0018] Flange connections facilitate the rapid connection of rigid air tubes to airbags and flange plugs.

[0019] Based on the above, an inflation valve is provided on the inflation port.

[0020] The airbag can be easily inflated / deflated via an inflation valve.

[0021] Based on the above, a pressure gauge is provided on the inflation port.

[0022] The pressure gauge allows for convenient monitoring of the airbag pressure at any time, preventing accidents such as airbag rupture and leakage, and contributing to the stable and continuous cleaning operation.

[0023] Based on the above, an observation mirror is provided on the outer side of the flange plug.

[0024] The viewing mirror allows for easy monitoring of the cleaning process and airbag status at any time.

[0025] This utility model has substantial features and progress compared to the prior art. Specifically, this application uses an airbag to seal the pipeline, and uses a rigid pipeline to insert, pull, support, and inflate / depress the airbag. The rigid pipeline is fixed by a flange plug and connected to a cleaning device, which can effectively seal and clean heat exchangers with large-diameter inlet / outlet water pipelines that do not have isolation valves. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 yes Figure 1 Detailed diagram of point A in the middle; Figure 3 yes Figure 1 Detailed diagram of point B in the middle; Figure 4 This is a structural schematic diagram of the flange plug of this utility model.

[0027] In the figure, the attached labels are as follows: airbag 1, air nozzle 11, first air pipe interface 12, first pull rope ring 13; flange plug 2, inflation interface 21, cleaning interface 22, second air pipe interface 23, second pull rope ring 24, observation mirror 25; rigid air pipe 3, pull rope 4, liner 5, plate heat exchanger 6. Detailed Implementation

[0028] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0029] Example 1 like Figures 1-4 As shown, the heat exchanger cleaning and sealing device of this embodiment includes an airbag 1, a flange plug 2, and a rigid air pipe 3. The flange plug 2 is used to install the pipe flange as the inlet / outlet of the cleaning medium. The airbag 1 is installed at the pipe body that needs to be sealed. After the airbag 1 is installed in place, the space between the airbag 1 and the flange plug 2 is considered as the sealed space, which can be cleaned using cleaning equipment. The airbag 1 can be placed at the pipe body that needs to be sealed using the rigid air pipe 3. When cleaning the space that needs to be sealed, the rigid air pipe 3 plays a role in preventing the airbag 1 from shifting.

[0030] Based on the above, such as Figure 1 As shown, for example, when the sealing device of this embodiment is applied to the plate heat exchanger 6, two sets of sealing devices of this embodiment can be used to seal the two interconnected distribution areas of the plate heat exchanger 6 respectively, so that the inter-plate flow channel (i.e., heat exchange gap) between the two interconnected distribution areas can be cleaned by the cleaning equipment.

[0031] In application, flange plug 2 is installed on the maintenance window of plate heat exchanger 6, and airbag 1 passes through the distribution area to reach the inlet / outlet water pipes of plate heat exchanger 6, sealing the inlet / outlet water pipes of plate heat exchanger 6. This prevents the cleaning medium from preferentially flowing into the inlet / outlet water pipes instead of flowing through the heat exchange elements, and avoids the inlet / outlet water pipes without isolation valves affecting the cleaning effect. Usually, two sets of sealing equipment are required to seal the inlet and outlet water pipes of plate heat exchanger 6 respectively.

[0032] It is worth mentioning that the sealing device of this application can be used not only for cleaning the plate heat exchanger 6, but also for: firstly, cleaning the space between the airbag 1 and the flange plug 2, wherein the space between the airbag 1 and the flange plug 2 can be provided with a drain outlet to discharge the cleaning medium; secondly, cleaning the space to be cleaned that is connected to the space between the airbag 1 and the flange plug 2, wherein the space to be cleaned is similar to the inter-plate flow channel of the plate heat exchanger 6, and the space to be cleaned is further provided with a drain outlet to discharge the cleaning medium.

[0033] Specifically, the air nozzle 11 of the airbag 1 is provided with a first air pipe interface 12, which is connected to the first air pipe interface 12. The first air pipe interface 12 can be used to connect the rigid air pipe 3. After connecting one end of the rigid air pipe 3 to the first air pipe interface 12, the airbag 1 can be placed at the pipe body that needs to be blocked by using the rigid air pipe 3. For example, the airbag 1 can be placed at the inlet / outlet water pipe of the plate heat exchanger 6 by passing through the distribution area (the medium distribution area at the top and bottom of the heat exchange plate) of the plate heat exchanger 6.

[0034] Meanwhile, the outer side of the flange plug plate 2 is provided with an inflation port 21 and a cleaning port 22, and the inner side of the flange plug plate 2 is provided with a second air pipe port 23. The inflation port 21 is connected to the second air pipe port 23, and the second air pipe port 23 can be used to connect to the rigid air pipe 3. After the airbag 1 is placed at the inlet / outlet water pipe of the plate heat exchanger 6 through the rigid air pipe 3, the second air pipe port 23 on the inner side of the flange plug plate 2 is connected to the rigid air pipe 3, so that the inflation port 21 is finally connected to the air nozzle 11 of the airbag 1. The airbag 1 can be inflated and deflated through the inflation port 21. Finally, the flange plug plate 2 is installed in place and cleaned through the cleaning port 22. For example, if it is installed at the inspection port of the plate heat exchanger 6, the cleaning equipment cleans the inter-plate flow channels of the plate heat exchanger 6 through the cleaning port 22.

[0035] In summary, the two ends of the rigid air tube 3 can be connected to the first air tube interface 12 and the second air tube interface 23 respectively. The first air tube interface 12 and the second air tube interface 23 can be connected to the first rigid air tube 3 by means such as flange, thread, or compression fitting.

[0036] In addition, after the airbag 1 and flange plug 2 are installed in place, the airbag 1 is pulled and supported by the rigid air pipe 3, which can prevent the airbag 1 from being washed away and displaced during the cleaning process.

[0037] When sealing a plate heat exchanger, the sealing device of this embodiment can be used as follows: First, after the airbag 1 is sucked in by the suction pump, the rigid air pipe 3 is connected to the first air pipe interface 12 at the air nozzle 11 of the airbag 1, and the airbag 1 is sent into the inlet / outlet water pipeline through the maintenance window and distribution area using the rigid air pipe 3; Second, the rigid air pipe 3 and the second air pipe interface 23 are connected, and the flange plug plate 2 is installed on the window; Third, the airbag 1 is inflated through the inflation interface 21 to complete the sealing; Fourth, the heat exchanger is cleaned through the cleaning interface 22. When disassembling this device, the following steps can be used: First, the airbag 1 is deflated through the inflation interface 21, and when it is deflated to atmospheric pressure, the airbag 1 is sucked in by the suction pump; Second, the flange plug plate 2 is removed, and the rigid air pipe 3 and the second air pipe interface 23 are removed; Third, the airbag 1 is pulled out through the rigid air pipe 3.

[0038] In this application, the airbag 1 can be placed in position by connecting the rigid air pipe 3 to the first air pipe interface 12. The airbag 1 can be pulled and supported by connecting the rigid air pipe 3 to the second air pipe interface 23 using the flange plug plate 2. The airbag 1 can be inflated / deflated by connecting the rigid air pipe 3 to the air nozzle 11 and the inflation interface 21. The cleaning interface 23 can be used to effectively perform cleaning operations. Therefore, when the sealing device in this application is applied to a heat exchanger with a large-diameter inlet / outlet water pipe without an isolation valve, it can effectively seal the inlet / outlet water pipe to complete the cleaning operation of the heat exchanger.

[0039] Example 2 Based on Embodiment 1, the flange plug 2 is configured as an eccentric flange, and the cleaning interface 22 is eccentrically set on the flange plug 2.

[0040] The eccentrically positioned cleaning port 22 facilitates the discharge of the cleaning medium from the port 22, preventing the deposition of solid particles. It also allows the center position of the flange plug 2 to be cleared, enabling the rigid air pipe 3 to be connected to the center position of the flange plug 2 to effectively pull and support the airbag 1.

[0041] Example 3 Based on embodiment 2, the airbag 1 is configured as a conical cylinder, wherein the cylindrical sidewall of the conical cylinder contacts the inner wall of the inlet / outlet water pipe to complete the sealing, the air nozzle 11 is located at the apex of the conical head of the airbag 1, and the first air pipe interface 12 is located at the center of the bolt hole distribution circle of the flange plug plate 2. The conical head of the conical cylinder can increase the contact area with the cleaning medium to effectively resist the flushing from the cleaning medium.

[0042] Meanwhile, the two ends of the rigid air tube 3 are connected to the center of the airbag 1 and the center of the flange plug 2 respectively, so that the airbag 1, the flange plug 2 and the rigid air tube 3 are coaxial, which can enhance the pulling and supporting strength of the rigid air tube 3 on the airbag 1.

[0043] Example 4 Based on Embodiment 3, the sealing device of this embodiment also includes a pull rope 4, a first pull rope ring 13 is provided on the airbag 1, and a second pull rope ring 24 is provided on the inner side of the flange blocking plate 2. The two ends of the pull rope 4 can be connected to the first pull rope ring 13 and the second pull rope ring 24 respectively.

[0044] The combined pulling force of the pull rope 4 and the rigid air tube 3 on the airbag 1 can effectively resist the impact of the cleaning medium on the airbag 1. Especially when the cleaning medium impacts the airbag 1 in the form of pulses, the pull rope 4 can share most of the impact force, while the rigid air tube 3 can effectively support the airbag 1 and prevent the airbag 1 from shifting.

[0045] By pulling the rope 4, the pulling force on the airbag 1 can be enhanced, thus preventing the connection between the rigid air tube 3 and the airbag 1 from failing.

[0046] Furthermore, the pull rope 4 is evenly distributed around the circumference of the rigid air tube 3 to generate a balanced pulling force on the airbag 1.

[0047] Example 5 Based on the above embodiments, the sealing device of this embodiment further includes a liner 5, which is used to allow the airbag 1 to pass through the liner 5 to protect the passage of the airbag 1. When the sealing device of this embodiment is used with the plate heat exchanger 6, since the distribution area inside the plate heat exchanger 6 is not a smooth pipe, but a complex space with many heat exchange plate frames, in order to prevent the airbag 1 from being cut, the liner 5 can be placed in the distribution area before the airbag 1 is inserted, and the liner 5 can be removed before the airbag 1 is inserted into place and the flange plug 2 is connected to the rigid air pipe 3.

[0048] Example 6 Based on the above embodiments, the first airway interface 12 and the second airway interface 23 adopt flange interfaces, and the two ends of the rigid airway 3 are provided with corresponding flanges to facilitate the quick connection of the rigid airway 3 with the airbag 1 and the flange plug 2.

[0049] Based on the above, an inflation valve is provided on the inflation port 21 to facilitate inflation / deflation of the airbag 1.

[0050] Based on the above, an air pressure gauge is provided on the inflation port 21 to facilitate monitoring of the air pressure of the airbag 1 at any time, avoid accidents such as airbag 1 rupture and leakage, and help ensure the stable and continuous cleaning operation.

[0051] Based on the above, an observation mirror 25 is provided on the outer side of the flange plug 2 to facilitate observation of the cleaning status and the condition of the airbag 1 at any time.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A heat exchanger cleaning and sealing device, characterized in that, The device includes an airbag (1), a flange plug (2), and a rigid air tube (3). The airbag (1) has a first air tube interface (12) on its air nozzle (11). The flange plug (2) has an inflation interface (21) and a cleaning interface (22) on its outer side. The flange plug (2) has a second air tube interface (23) on its inner side. The inflation interface (21) is connected to the second air tube interface (23). The two ends of the rigid air tube (3) can be connected to the first air tube interface (12) and the second air tube interface (23) respectively.

2. The heat exchanger cleaning and sealing device according to claim 1, characterized in that, The flange plug (2) is configured as an eccentric flange, and the cleaning port (22) is eccentrically set on the flange plug (2).

3. The heat exchanger cleaning and sealing device according to claim 2, characterized in that, The airbag (1) is configured as a conical cylinder, the air nozzle (11) is located at the apex of the conical head of the airbag (1), and the first air pipe interface (12) is located at the center of the bolt hole distribution circle of the flange plug plate (2).

4. The heat exchanger cleaning and sealing device according to claim 3, characterized in that, The sealing device also includes a pull rope (4), a first pull rope ring (13) is provided on the airbag (1), and a second pull rope ring (24) is provided on the inner side of the flange plug (2). The two ends of the pull rope (4) can be connected to the first pull rope ring (13) and the second pull rope ring (24) respectively.

5. The heat exchanger cleaning and sealing device according to claim 4, characterized in that, The pull rope (4) is evenly distributed around the circumference of the rigid air tube (3) to generate a balanced pulling force on the airbag (1).

6. The heat exchanger cleaning and sealing device according to claim 1, characterized in that, The sealing device also includes a liner (5) for allowing the airbag (1) to pass through the liner (5) to protect the passage of the airbag (1).

7. The heat exchanger cleaning and sealing device according to claim 1, characterized in that, The first air pipe interface (12) and the second air pipe interface (23) adopt flange interfaces, and the two ends of the rigid air pipe (3) are provided with corresponding flanges.

8. The heat exchanger cleaning and sealing device according to claim 1, characterized in that, An inflation valve is provided on the inflation port (21).

9. The heat exchanger cleaning and sealing device according to claim 1, characterized in that, The inflation port (21) is equipped with a pressure gauge.

10. The heat exchanger cleaning and sealing device according to claim 1, characterized in that, An observation mirror (25) is provided on the outside of the flange plug (2).

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