Non-welding plugging plug for air cooler wire plug type tube bundle heat exchange tube

Abstract

The utility model relates to air cooler pipe box equipment field discloses a kind of air cooler plug pipe bundle heat exchange tube non-welding plugging plug, the device includes inner expansion sealing plug, the plug end of the slope shape being arranged in its bottom, the nylon or rubber expansion sealing ring being sleeved on expansion sealing ring pull rod, and the compacting mechanism being formed by pull rod pressure disc and pull rod nut;The expansion sealing ring includes expansion ring and sealing pad, and the expansion sealing ring is extruded by rotating pull rod nut drive pressure disc, so that expansion ring is radially expanded sealing in the expansion groove formed between heat exchange tube and plug end;The device discards traditional thread sealing adhesive tape, and inner expansion sealing plug is installed to damaged heat exchange tube by plug hole, avoid the plugging of the heat exchange tube of closed pipe box to be limited, heat exchange tube does not need to weld and block, utilize the internal pressure of pipe bundle to assist to enhance sealing property, completely solve leakage problem, significantly reduce maintenance cost, and air cooler equipment life can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger equipment for air coolers, specifically to a non-welded plug for heat exchanger tubes of air cooler wire plug type tube bundle. Background Technology

[0002] Currently, heat exchangers in air coolers are widely used heat exchange equipment in industrial production, mainly composed of tube sheets and a large number of arranged heat exchange tubes. During operation, heat exchangers experience problems such as individual tube breakage and leakage, requiring timely repair to ensure the continued operation of the heat exchange equipment. Existing heat exchanger tube boxes are divided into open and closed types. In open tube box heat exchangers, when individual heat exchange tubes leak, both ends of the tube are welded and sealed for isolation. In closed tube box heat exchangers, when individual heat exchange tubes leak, the tube heads are inside the closed tube box, restricting the welding and sealing repair operation, which may even lead to the dismantling and overhaul of the heat exchanger, affecting its operation. In view of the above reasons, a non-welded sealing plug for the tube bundle heat exchange tubes in air coolers is proposed. Utility Model Content

[0003] The purpose of this invention is to overcome the problem that when individual heat exchange tubes in a closed tube-box heat exchanger leak, the tube heads are inside the closed tube box, making welding and sealing impossible for isolation and maintenance. Through a reasonable design, this invention provides a non-welded plug for air cooler tube bundle heat exchangers using a plug-type plug. This invention repairs damaged heat exchange tubes through the plug hole. When a heat exchange tube in an air cooler is damaged, the operator removes the plug from the plug plate on-site and installs the internal expansion sealing plug through the plug hole onto the damaged heat exchange tube. The internal expansion sealing plug, through a pull rod and pressure plate, compresses the expansion sealing ring for expansion and sealing, ensuring a tight and reliable seal. No major disassembly, repair, or welding is required. The expansion sealing ring compresses and expands to seal the heat exchange tube, simplifying the operation, significantly shortening the heat exchanger repair cycle, saving costs, reducing the heat exchange tube maintenance cycle, and ensuring the operation of the air cooler.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: A non-welded plug for air-cooled tube bundle heat exchange tubes with threaded plugs, comprising: an internal expansion sealing plug, a plug bayonet, a plug end, an expansion sealing ring, an expansion ring, a sealing gasket, an expansion sealing ring pull rod, a pull rod pressure plate, a pull rod nut, a sealing ring, a heat exchanger enclosed tube box, a tube end plate, a threaded plug plate, a threaded plug hole, a heat exchange tube, and an expansion groove. Two sealing rings are respectively arranged around the middle part of the outer side of the internal expansion sealing plug. The outer side of the sealing plug opening is evenly distributed with pre-reserved plug slots. The bottom of the inner expansion sealing plug is provided with a plug end, the outer side of which is set as a slope. A pull rod hole is reserved in the center of the plug end, and an expansion sealing ring pull rod is installed in the pull rod hole. A pull rod pressure plate is provided at one end of the expansion sealing ring pull rod, and a pull rod nut is provided at the other end. An expansion sealing ring is fitted on the expansion sealing ring pull rod. An inner expansion sealing plug is provided between the pull rod nut and the pull rod pressure plate. The pull rod pressure plate is used to press the expansion sealing ring and the plug end for sealing.

[0005] A sealing pad is provided at the bottom of the expansion sealing ring, and an expansion ring is provided at the opening of the expansion sealing ring. The inner side of the expansion ring is set as an annular ramp structure. The expansion sealing ring is made of nylon or rubber material. The pull rod pressure plate is used to press the sealing pad, and the expansion ring is used to seal the ramp at the end of the plug.

[0006] The closed tube box is configured as a heat exchange chamber. A tube end plate is installed on one side of the closed tube box, and a plug plate is installed on the other side. The plug plate and the tube end plate have corresponding reserved holes. The holes of the plug plate are set as plug holes, and plugs are installed in the plug holes. The holes of the tube end plate are set as tube holes, and heat exchange tubes are installed in the tube holes. The tube ends of the heat exchange tubes are pre-threaded. The tube holes and plug holes of the heat exchange tubes are set as corresponding holes, and the plug holes are set to be larger than the diameter of the heat exchange tubes.

[0007] The heat exchange tube head is threaded with the outer side of the inner expansion seal plug. The inner expansion seal plug is used for sealing and isolating the heat exchange tube head. An expansion groove is reserved between the slope of the plug end and the heat exchange tube. An expansion ring is installed in the expansion groove. The expansion ring is used for pressing and expanding the expansion groove. A maintenance socket wrench is provided for the inner expansion seal plug corresponding to the plug bayonet and the pull rod nut.

[0008] Working principle: When an individual heat exchange tube is damaged and needs repair, the plug on the corresponding end of the damaged heat exchange tube is removed. The inner expansion sealing plug is then tightened by manually operating a socket wrench and inserting it into the damaged heat exchange tube for rotation and tightening. After the inner expansion sealing plug is installed in the damaged heat exchange tube, the expansion sealing ring pull rod and pull rod pressure plate are rotated and pulled by the socket wrench with the pull rod nut. The pull rod pressure plate squeezes the expansion sealing ring and expansion ring, and the expansion ring expands and seals after entering the expansion groove.

[0009] Beneficial effects: This utility model repairs damaged heat exchange tubes through a plug hole. When a heat exchange tube in an air cooler is damaged, the operator removes the plug on the plug plate on-site and installs an internal expansion sealing plug through the plug hole onto the damaged heat exchange tube. The internal expansion sealing plug is pressed by a pull rod and pressure plate to achieve expansion and sealing of the expansion sealing ring. The seal is tight and reliable, eliminating the need for disassembly, overhaul, or welding. The expansion sealing ring compresses and expands to seal the heat exchange tube, making the operation simple, greatly shortening the heat exchanger repair cycle, saving costs, reducing the heat exchange tube maintenance cycle, and ensuring the operation of the air cooler. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings:

[0011] Figure 1 This is a schematic diagram of the overall assembly structure;

[0012] Figure 2 yes Figure 1 Schematic diagram of the heat exchanger tube box;

[0013] Figure 3 yes Figure 1 A schematic diagram of the heat exchange tube structure;

[0014] Figure 4 yes Figure 1 A schematic diagram of the internal expansion sealing plug and heat exchange tube;

[0015] Figure 5 yes Figure 1 A schematic diagram of the expansion sealing ring structure;

[0016] Figure 1 , 2 1, 2, 3, 4, 5: Internal expansion sealing plug 1, plug bayonet 1-1, plug end 2, expansion sealing ring 3, expansion ring 3-1, sealing gasket 3-2, expansion sealing ring pull rod 4, pull rod pressure plate 5, pull rod nut 6, sealing ring 7, closed tube box 8, tube end plate 8-1, threaded plug plate 8-2, threaded plug hole 8-3, heat exchange tube 9, expansion groove 9-1. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0018] Two sealing rings 7 are respectively arranged around the middle of the outer side of the inner expansion sealing plug 1. The outer side of the opening of the inner expansion sealing plug 1 is evenly distributed with pre-reserved plug slots 1-1. The bottom of the inner expansion sealing plug 1 is provided with a plug end 2. The outer side of the plug end 2 is set as a slope. The center of the plug end 2 is reserved with a pull rod hole. An expansion sealing ring pull rod 4 is set in the pull rod hole. A pull rod pressure plate 5 is provided at one end of the expansion sealing ring pull rod 4, and a pull rod nut 6 is provided at the other end of the expansion sealing ring pull rod 4. An expansion sealing ring 3 is sleeved on the expansion sealing ring pull rod 4. The inner expansion sealing plug 1 is set between the pull rod nut 6 and the pull rod pressure plate 5. The pull rod pressure plate 5 is used to press the expansion sealing ring 3 and the plug end 2 for sealing.

[0019] A sealing pad 3-2 is provided at the bottom of the expansion sealing ring 3, and an expansion ring 3-1 is provided at the opening of the expansion sealing ring 3. The inner side of the expansion ring 3-1 is set as an annular sloping structure. The expansion sealing ring 3 is made of nylon or rubber material. The pull rod pressure plate 5 is used to press the sealing pad 3-2, and the expansion ring 3-1 is used to seal the slope of the plug end 2.

[0020] The closed tube box 8 is configured as a heat exchange chamber. A tube end plate 8-1 is installed on one side of the closed tube box 8, and a plug plate 8-2 is installed on the other side of the closed tube box 8. The plug plate 8-2 and the tube end plate 8-1 have corresponding reserved holes. The holes of the plug plate 8-2 are respectively set as plug holes 8-3, and plugs are installed in the plug holes 8-3. The holes of the tube end plate 8-1 are respectively set as tube holes, and heat exchange tubes 9 are respectively installed in the tube holes. The tube head of the heat exchange tube 9 is reserved with threads. The tube holes of the heat exchange tube 9 and the plug holes 8-3 are set as corresponding holes, and the plug holes 8-3 are set to be larger than the diameter of the heat exchange tube 9.

[0021] The heat exchange tube 9 has a threaded connection between its tube head and the outer side of the inner expansion sealing plug 1. The inner expansion sealing plug 1 is used for sealing and isolating the heat exchange tube 9. An expansion groove 9-1 is reserved between the slope of the plug end 2 and the heat exchange tube 9. An expansion ring 3-1 is installed in the expansion groove 9-1. The expansion ring 3-1 is used for pressing and expanding the expansion groove 9-1. A maintenance socket wrench is provided for the inner expansion sealing plug 1, corresponding to the plug bayonet 1-1 and the pull rod nut 6.

Claims

1. A non-welded plug for heat exchange tubes in an air cooler using a plug-type tube bundle, comprising: an internal expansion sealing plug (1), a plug bayonet (1-1), a plug end (2), an expansion sealing ring (3), an expansion ring (3-1), a sealing gasket (3-2), an expansion sealing ring pull rod (4), a pull rod pressure plate (5), a pull rod nut (6), a sealing ring (7), a closed tube box (8), a tube end plate (8-1), a plug plate (8-2), a plug hole (8-3), a heat exchange tube (9), and an expansion groove (9-1); characterized in that: Two sealing rings (7) are respectively arranged around the middle part of the outer side of the inner expansion sealing plug (1). The outer side of the opening of the inner expansion sealing plug (1) is evenly distributed with pre-reserved plug slots (1-1). The bottom of the inner expansion sealing plug (1) is provided with a plug end (2). The outer side of the plug end (2) is set as a slope. The center of the plug end (2) is reserved with a pull rod hole. An expansion sealing ring pull rod (4) is set in the pull rod hole. A pull rod pressure plate (5) is set at one end of the expansion sealing ring pull rod (4). A pull rod nut (6) is set at the other end of the expansion sealing ring pull rod (4). An expansion sealing ring (3) is sleeved on the expansion sealing ring pull rod (4). The inner expansion sealing plug (1) is set between the pull rod nut (6) and the pull rod pressure plate (5). The pull rod pressure plate (5) is used to press the expansion sealing ring (3) and the plug end (2) for sealing.

2. The non-welded plug of the air cooler tube bundle heat exchanger tube according to claim 1, characterized in that: A sealing pad (3-2) is provided at the bottom of the expansion sealing ring (3), and an expansion ring (3-1) is provided at the opening of the expansion sealing ring (3). The inner side of the expansion ring (3-1) is set as an annular slope structure. The expansion sealing ring (3) is made of nylon or rubber material. The pull rod pressure plate (5) is used to press the sealing pad (3-2), and the expansion ring (3-1) is used to seal the slope of the plug end (2). The closed tube box (8) is set as a heat exchange chamber. A tube end plate (8-1) is set on one side of the closed tube box (8), and a plug plate (8-2) is set on the other side of the closed tube box (8). The plug plate (8-2) and the tube end plate (8-1) are arranged with reserved holes corresponding to each other. The holes of the plug plate (8-2) are respectively set as plug holes (8-3), and plugs are respectively set in the plug holes (8-3). The holes of the tube end plate (8-1) are respectively set as tube holes, and heat exchange tubes (9) are respectively set in the tube holes. The tube head of the heat exchange tube (9) is reserved with threads. The tube holes of the heat exchange tube (9) and the plug holes (8-3) are set as corresponding holes. The plug holes (8-3) are set to be larger than the diameter of the heat exchange tube (9). The heat exchange tube (9) is threaded between the tube head and the outer side of the inner expansion sealing plug (1). The inner expansion sealing plug (1) is used for sealing and isolating the tube head of the heat exchange tube (9). An expansion groove (9-1) is reserved between the slope of the plug end (2) and the heat exchange tube (9). An expansion ring (3-1) is set in the expansion groove (9-1). The expansion ring (3-1) is used for pressing and expanding the expansion groove (9-1). A maintenance socket wrench is set for the inner expansion sealing plug (1) corresponding to the plug bayonet (1-1) and the pull rod nut (6).

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