Pipe plugging assembly and air-dry cooling radiator pipe bundle plugging structure

Abstract

The utility model discloses a pipe plugging assembly and a pipe bundle plugging structure of an air dry cooling radiator. The pipe plugging assembly comprises a plug and a plug cap which are integrally formed and made of plastic materials. The plug is provided with a variable-diameter section which is tightened along the direction far away from the plug cap according to a preset taper, and a non-variable-diameter section which is formed at the tail end of the variable-diameter section and extends straightly; the maximum outer diameter of the reducing section is larger than the inner diameter of a channel opening of the water inlet header so that the reducing section can serve as an expansion plug part to be expanded in the channel opening. The outer diameter of the non-variable-diameter section is equal to the inner diameter of a lining pipe of the double-layer pipe bundle so that the non-variable-diameter section can serve as a blocking part to be inserted into a pipe opening of the lining pipe. The utility model provides a pipe plugging assembly and an air-dry-cooling radiator pipe bundle plugging structure, which can thoroughly solve the problem of pipe plugging after leakage of an air-dry-cooling radiator pipe bundle, thereby avoiding the defect of repeated pipe plugging caused by aging of plug parts after the pipe bundle is plugged, reducing the pipe plugging cost and ensuring the pipe plugging effect.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid plugging, and more specifically, to a pipe plugging assembly and a plugging structure for an air-cooled radiator tube bundle. Background Art

[0002] An air-cooled radiator, also known as a dry air cooler, is a heat dissipation device that uses the heat transfer principle to transfer heat. This type of radiator is widely used in industries such as industry, energy, oil refining, and petrochemicals to achieve local cooling, improve work efficiency, and the stability of equipment operation.

[0003] The working principle of a dry air cooler is mainly based on the medium inside the device being heated by the outside, causing the temperature of the medium to rise, the molecular kinetic energy to increase, and heat to be generated. Subsequently, this heat is transferred to the wall of the device through radiation and convection, and finally transferred to the outside air through air convection. During this process, the dry air cooler does not require the use of any water resources, so there will be no problems of water pollution or water waste.

[0004] The advantages of a dry air cooler lie not only in its energy-saving and environmental protection characteristics, but also in its convenient installation. Since no additional water source or cooling tower and other facilities are required, it only needs to be fixed on the equipment that needs to dissipate heat. In addition, its volume is relatively small, occupying less space, which further facilitates the installation process.

[0005] In the industrial field, dry air coolers are widely used in industries such as steel, machinery manufacturing, chemical engineering, and metallurgy to achieve local cooling, improve work efficiency, and employee comfort. In the energy field, especially in industries such as power plants, power stations, and power plants, dry air coolers can effectively dissipate the heat generated by equipment into the environment to ensure the stable operation of the equipment. In the oil refining and petrochemical fields, dry air coolers are used to cool and condense various process fluids to ensure the continuity and stability of the production process.

[0006] Dry air coolers are usually designed as multi-layer structures, and the tube bundles are connected to the channel openings of each layer in the water inlet connection according to a specific arrangement. This arrangement is designed to maximize the contact area between air and the process fluid, thereby improving the cooling efficiency. The arrangement of the tube bundles can be horizontal, vertical, or inclined, depending on the design and application requirements of the cooler. Considering the large number of tube bundles in a dry air cooler and the large carrying load, individual tube bundle leakage accidents are inevitable after long-term operation. At this time, the cost of either choosing to replace the equipment as a whole or to disassemble and repair the equipment is too high. Therefore, the pipe plugging method is often adopted to ensure that the radiator can be put into normal use without affecting the normal operation of the unit or the industrial system.

[0007] The conventional method for plugging the tubes of a radiator bundle generally uses a swelling plug with an O-ring made of aluminum alloy installed at the tube bundle opening. On the one hand, aluminum alloy needs to be processed by means of casting, forging, etc., and the processing difficulty and cost are relatively high. On the other hand, when some tube bundles of a dry air cooler leak during the factory pressure test, an inner lining tube will be arranged inside. When using a conventional aluminum alloy swelling plug for tube plugging operations, it often cannot be fed due to hitting the inner lining tube. If the plug is forced to be tightened by swelling, it is very easy to cause the tube bundle to rupture. Summary of the Invention

[0008] In view of the defects in the prior art, the present invention provides a tube plugging assembly and an air-cooled radiator tube bundle plugging structure, which can completely solve the problem of tube plugging after the leakage of the air-cooled radiator tube bundle, thereby eliminating the drawback that the plug components age after tube plugging and require repeated tube plugging, so as to reduce the tube plugging cost and ensure the tube plugging effect.

[0009] In order to achieve the above object, the specific technical solutions adopted by the present invention are as follows:

[0010] A tube plugging assembly, which is characterized in that: it includes a plug and a plug cap that are integrally formed and made of a plastic material; the plug has a variable diameter section that tapers along the direction away from the plug cap and a non-variable diameter section that is formed at the end of the variable diameter section and extends straight; wherein: the maximum outer diameter of the variable diameter section is greater than the inner diameter of the channel opening of the water inlet header to serve as a swelling part to be tightened in the channel opening; the outer diameter of the non-variable diameter section is equal to the inner diameter of the inner lining tube of the double-layer tube bundle to serve as a plugging part to be inserted into the tube opening of the inner lining tube.

[0011] Furthermore, a sealing ring is sleeved on the plug, and the sealing ring is used to be pressed against the wall of the water inlet header by the plug cap to form a seal around the channel opening of the water inlet header.

[0012] Furthermore, both the plug and the plug cap are solid structures processed from nylon.

[0013] Furthermore, the minimum outer diameter of the variable diameter section is the same as the outer diameter of the non-variable diameter section.

[0014] Based on the above structure, the present invention also discloses an air-cooled radiator tube bundle plugging structure, which includes a water inlet header and an end cover for closing the water inlet header. A number of channel openings are distributed in a staggered manner on the wall of the water inlet header, and a double-layer tube bundle is connected to each channel opening. The key lies in: it further includes a tube plugging assembly, which can achieve plugging through the tube plugging assembly when the double-layer tube bundle leaks, and in the plugged state, the variable diameter section is swollen in the corresponding channel opening of the water inlet header, and the non-variable diameter section is inserted into the tube opening of the corresponding inner lining tube of the double-layer tube bundle.

[0015] Furthermore, a sealing ring is tightly arranged between the blocking cap and the box wall of the water inlet manifold.

[0016] Furthermore, an end cover pressing plate is abutted between the end cover and the blocking cap, and a notch adapted to the blocking cap is reserved at the plate end of the end cover pressing plate.

[0017] Furthermore, a silicone structural sealant is filled between the outer surface of the diameter-changing section and the inner surface of the corresponding channel opening.

[0018] In thermal power plant systems and other industrial systems, air-dry cooling radiators are often blocked when individual tube bundles leak to ensure that the radiator can be put into normal operation without affecting the normal operation of the unit or industrial system. Compared with existing technologies, this radiator tube bundle blocking method has at least the following six advantages:

[0019] (1) The plugging assembly is reasonably designed and easy to operate. The combination of the plug and the plug cap can quickly and effectively plug the leakage of the double-layer tube bundle, greatly reducing maintenance time and labor costs;

[0020] (2) The pipe plugging assembly adopts a solid structure made of nylon, which has good corrosion resistance and wear resistance, ensuring that the performance will not be degraded due to environmental factors during long-term use;

[0021] (3) The setting of the sealing ring ensures the sealing performance between the pipe plugging assembly and the wall of the water inlet header, effectively preventing the further spread of the leakage problem. At the same time, the filling of silicone structural sealant enhances the sealing performance between the pipe plugging assembly and the channel opening, further improving the pipe plugging effect;

[0022] (4) The reducing section of the plugging assembly is expanded and plugged into the corresponding channel opening of the leaking tube bundle of the water inlet manifold, and the non-reducing section is plugged into the inner lining tube opening of the leaking tube bundle. This design not only ensures the firmness of the plugging, but also avoids excessive resistance to the inner tube causing the tube bundle to rupture. It is particularly suitable for the double-layer tube bundle structure of the dry cooling radiator;

[0023] (5) Through the setting of the end cover pressure plate, the end cover and the plugging cap can be easily fastened, which improves the overall stability of the plugging structure. At the same time, the notch design of the end cover pressure plate makes the installation and disassembly process more convenient and improves the maintenance efficiency;

[0024] (6) Since nylon is easy to process, the size of the plug assembly can be machined to match the size of the tube bundle. Compared with conventional aluminum alloy expansion plugs, the cost is reduced by more than 2 / 3. It is easy to make and requires no maintenance for life after a one-time investment and can be used throughout the entire cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] Figure 1 It is a schematic structural diagram of the pipe plugging assembly in the first embodiment;

[0027] Figure 2 It is a schematic diagram of the plugging structure of the hollow air-cooled radiator tube bundle in the second embodiment.

[0028] 1 - Plug, 2 - Plug cap, 101 - Reducing section, 102 - Non-reducing section, 3 - Sealing ring, 4 - Inlet header, 5 - Channel opening, 6 - Double-layer tube bundle, 7 - End cover, 8 - End cover pressing plate, 9 - Notch, 10 - Silicone structural sealant, 601 - Inner liner tube, 602 - Outer sleeve tube. Specific embodiments

[0029] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, in the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0031] Figure 1 The first embodiment of the present invention is shown: A pipe plugging assembly includes a plug 1 and a plug cap 2 that are integrally formed and made of a plastic material; the plug 1 has a reducing section 101 that tapers in a direction away from the plug cap 2, and a non-reducing section 102 formed at the end of the reducing section 101 and extending straight; wherein: the maximum outer diameter of the reducing section 101 is greater than the inner diameter of the channel opening 5 of the inlet header 4 to serve as an expansion plug portion and expand and tighten in the channel opening 5; the outer diameter of the non-reducing section 102 is equal to the inner diameter of the inner liner tube 601 of the double-layer tube bundle 6 to serve as a plugging portion and insert into the tube orifice of the inner liner tube 601.

[0032] In this embodiment, in order to enhance the sealing performance of the pipe plugging assembly, a sealing ring 3 is sleeved on the plug 1. The sealing ring 3 is used to be pressed against the wall of the water inlet header 4 by the plug cap 2 to form a seal around the channel opening 5 of the water inlet header 4. In order to reduce the material cost and processing cost of the pipe plugging assembly, and at the same time improve the erosion resistance, corrosion resistance and other properties of the pipe plugging assembly, both the plug 1 and the plug cap 2 are solid structures processed from nylon.

[0033] During specific implementation, the minimum outer diameter of the reduced diameter section 101 is the same as the outer diameter of the non-reduced diameter section 102.

[0034] Figure 2 The second embodiment of the present invention is shown. An air-cooled radiator tube bundle plugging structure includes a water inlet header 4 and an end cover 7 for closing the water inlet header 4. A plurality of channel openings 5 are distributed in a staggered manner on the wall of the water inlet header 4. A double-layer tube bundle 6 (composed of an inner lining tube 601 and an outer sleeve tube 602 sleeved around the outer periphery of the inner lining tube 601) is connected to each channel opening 5. The pipe plugging assembly is also included. When the double-layer tube bundle 6 leaks, it can be plugged by the pipe plugging assembly. And in the plugged state, the reduced diameter section 101 is expanded and plugged in the corresponding channel opening 5 of the water inlet header 4, and the non-reduced diameter section 102 is inserted into the nozzle of the inner lining tube 601 of the corresponding double-layer tube bundle 6.

[0035] During specific implementation, a sealing ring 3 is tightly pressed between the plug cap 2 and the wall of the water inlet header 4. In order to ensure the stable installation of the plug 1 assembly to prevent it from falling off and ensure its sealing performance, an end cover pressing plate 8 is abutted between the end cover 7 and the plug cap 2, and a notch 9 adapted to the plug cap 2 is reserved at the plate end of the end cover pressing plate 8. A silicone structural sealant 10 is filled between the outer surface of the reduced diameter section 101 and the inner surface of the corresponding channel opening 5.

[0036] In practical applications, when the double-layer tube bundle 6 leaks, first close the water inlet valve of the water inlet header 4 to ensure that the system is in a safe state. Then, remove the end cover 7 of the water inlet header 4, pour silicone structural sealant 10 into the channel opening 5, and then insert the plug 1 from the nozzle of the inner lining tube 601 of the double-layer tube bundle 6 until the non-reduced diameter section 102 is completely inserted into the inner lining tube 601. At the same time, when the non-reduced diameter section 102 is completely inserted into the inner lining tube 601, the reduced diameter section 101 is expanded and tightened in the channel opening 5 of the water inlet header 4, and the silicone structural sealant 10 fills the gap between the outer surface of the reduced diameter section 101 and the inner surface of the channel opening 5. Finally, install the end cover 7, and apply force to the sealing ring 3 through the end cover pressing plate 8 and the plug cap 2 to ensure that the sealing ring 3 is tightly pressed, so as to further fix and seal the pipe plugging assembly.

[0037] In summary, the pipe plugging assembly is reasonably designed and easy to operate. Through the combination of the plug 1 and the plug cap 2, the leakage port of the double-layer tube bundle 6 can be quickly and effectively plugged, greatly reducing the maintenance time and labor costs; the pipe plugging assembly adopts a solid structure processed from nylon, with good corrosion resistance and wear resistance, which can ensure that its performance will not decline due to environmental factors during long-term use; the setting of the sealing ring 3 ensures the sealing performance between the pipe plugging assembly and the wall of the water inlet header 4, effectively preventing the further spread of leakage problems. At the same time, the filling of the silicone structural sealant 10 enhances the sealing between the pipe plugging assembly and the channel opening 5, further improving the pipe plugging effect; the reduced-diameter section 101 of the pipe plugging assembly is expanded and plugged in the corresponding channel opening 5 of the leaking tube bundle of the water inlet header 4, and the non-reduced-diameter section 102 is plugged in the nozzle of the inner lining tube 601 of the leaking tube bundle. This design not only ensures the firmness of the plugging, but also avoids excessive contact with the inner tube and causing the tube bundle to rupture, and is particularly suitable for the double-layer tube bundle 6 structure of the dry-cooled radiator; through the setting of the end cover pressing plate 8, the fastening between the end cover 7 and the plug cap 2 can be conveniently realized, improving the overall stability of the plugging structure. At the same time, the notch 9 design of the end cover pressing plate 8 makes the installation and disassembly process more convenient, improving the maintenance efficiency; because nylon is easy to process, the size of the plug 1 assembly can be machined to fit well with the tube bundle size. Compared with the conventional aluminum alloy expansion plug 1, the cost is reduced by more than two-thirds, the production is convenient and simple, and it does not require maintenance for life after one-time investment and can be used throughout the cycle.

[0038] Finally, it should be noted in the specification that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the specification of the present invention.

Claims

1. A pipe blocking component, characterized in that: It includes a plug head and a plug cap that are integrally formed and made of plastic material; the plug head has a reduced-diameter section that tapers and tightens in the direction away from the plug cap according to a predetermined taper, and a non-reduced-diameter section that is formed at the end of the reduced-diameter section and extends straight; wherein: the maximum outer diameter of the reduced-diameter section is greater than the inner diameter of the channel opening of the water inlet header to serve as a swelling plug part and tighten in the channel opening; the outer diameter of the non-reduced-diameter section is equal to the inner diameter of the inner lining tube of the double-layer tube bundle to serve as a plugging part and insert into the tube orifice of the inner lining tube.

2. The pipe plugging assembly according to claim 1, wherein: A sealing ring is sleeved on the plug head, and the sealing ring is used to be pressed against the wall of the water inlet header by the plug cap to form a seal around the channel opening of the water inlet header.

3. The pipe plugging assembly according to claim 1, wherein: Both the plug head and the plug cap are solid structures processed from nylon.

4. The plugging pipe assembly according to any one of claims 1-3, characterized in that: The minimum outer diameter of the reduced-diameter section is consistent with the outer diameter of the non-reduced-diameter section.

5. An air-cooled radiator tube bundle plugging structure, comprising a water inlet header and an end cover for closing the water inlet header. A number of channel openings are distributed in a staggered manner on the wall of the water inlet header, and a double-layer tube bundle is connected to each channel opening. It is characterized in that: It further includes a pipe plugging assembly as described in any one of claims 1-4. When the double-layer tube bundle leaks, the pipe plugging assembly can be used to achieve plugging. And in the plugged state, the reduced-diameter section swells and plugs in the corresponding channel opening of the water inlet header, and the non-reduced-diameter section plugs in the tube orifice of the corresponding inner lining tube of the double-layer tube bundle.

6. The plugging structure of the dry air-cooled radiator tube bundle according to claim 5, characterized in that: A sealing ring is tightly pressed between the plug cap and the wall of the water inlet header.

7. The dry air-cooled radiator tube bundle plugging structure according to claim 6, characterized in that: A end cover pressing plate is abutted between the end cover and the plug cap, and a notch adapted to the plug cap is reserved at the plate end of the end cover pressing plate.

8. The dry air-cooled radiator tube bundle plugging structure according to claim 6 or 7, characterized in that: Silicone structural sealant is filled between the outer surface of the reduced-diameter section and the inner surface of the corresponding channel opening.

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