A heat exchanger leak stoppage tube device

Abstract

The utility model belongs to heat exchanger leak stoppage technical field especially relates to a heat exchanger leak stoppage pipe device. The utility model discloses the abutment component, expansion component and extrusion component, wherein expansion component is located between abutment component and extrusion component, abutment component includes the bolt of inserting in the inside of heat exchange pipe, extrusion component includes the nut of screwing on bolt, a plurality of connecting rods of fixed connection in the nut near one side of bolt and the ball set up on the connecting rod end. The utility model effectively avoids the problem that the extrusion ability of conical washer to packing is limited, which will affect the leak stoppage effect of heat exchange pipe, and through extruding annular sealing washer simultaneously, the leak stoppage effect of heat exchange pipeline is improved.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger leak sealing technology, and in particular relates to a heat exchanger leak sealing tube device. Background Technology

[0002] A heat exchanger, also known as a heat transfer device, is a device that transfers some of the heat from a hot fluid to a cold fluid. Its main function is to transfer heat from a high-temperature fluid to a low-temperature fluid to meet process requirements and improve energy efficiency. When leaks occur in the heat exchanger tubes, they need to be sealed, thus requiring the use of specialized leak-sealing devices.

[0003] For example, Chinese utility model patent CN220398344U discloses a heat exchanger plugging tube device. This device uses bolts and nuts to squeeze the packing, so that the packing fits tightly against the inner wall of the heat exchange tube and seals it. It solves the leakage problem at the end of the heat exchange tube, and can achieve plugging simply and quickly with high work efficiency.

[0004] However, in actual use, when the conical washer is pushed by the nut to squeeze the packing, its squeezing ability is limited due to the obstruction of the heat exchange tube wall. This results in a relatively limited degree of packing deformation, which can easily lead to gaps between the packing and the inner wall of the heat exchange tube, thus affecting the sealing effect on the heat exchange tube. Utility Model Content

[0005] The purpose of this invention is to provide a device for plugging leaks in heat exchangers.

[0006] The technical solution adopted by this utility model to solve the above problems is: a heat exchanger plugging tube device, placed at the tube opening of the heat exchange tube, comprising: An abutting component, an expansion component, and a compression component, wherein the expansion component is located between the abutting component and the compression component; The abutment assembly includes bolts that are inserted into the heat exchange tube; The extrusion assembly includes a nut screwed onto the bolt, a plurality of connecting rods fixedly connected to the nut near the bolt, and ball bearings disposed at the ends of the connecting rods.

[0007] The bolt is inserted into the heat exchange tube as an axial support base. When the nut is rotated and pushed along the bolt thread, it pushes the ball to move axially through the connecting rod. The axial movement of the ball is converted into radial extrusion force on the expansion component, causing the expansion component to produce uniform radial expansion deformation inside the heat exchange tube. The expansion component deforms deep inside the tube, pushing the sealing packing to form an interference fit with the inner wall of the heat exchange tube, thus achieving a three-dimensional seal.

[0008] A further preferred technical solution is that the expansion assembly includes two sets of gaskets, two sets of annular sealing gaskets, and a filler layer, wherein the filler layer is located between the two sets of annular sealing gaskets, and the annular sealing gaskets are located between the gaskets.

[0009] A further preferred technical solution is that the gasket, sealing washer, and filler layer are all fitted onto the bolt.

[0010] A further preferred technical solution is that the bolt includes a screw, and the inner end of the screw is provided with a head limiting block for abutting against the gasket.

[0011] A further preferred technical solution is that: a tail limiting block is provided at the outer end of the screw, and the tail limiting block fixes the screw through a clamping action.

[0012] A further preferred technical solution is that the head limiting block is tangent to the inner wall of the heat exchange tube.

[0013] A further preferred technical solution is that the tail limiting block has a regular hexagonal prism structure.

[0014] A further preferred technical solution is that the filler layer is provided with nano-graphite components and polytetrafluoroethylene components.

[0015] A further preferred technical solution is that the annular sealing gasket is provided with a rubber component.

[0016] A further preferred technical solution is that: four connecting rods are provided on the nut, and are symmetrically arranged along the center of the nut.

[0017] In summary, this utility model involves sequentially placing two sets of gaskets, two sets of annular sealing washers, and a packing layer outside the bolt in the following order: gasket, annular sealing washers, packing layer, annular sealing washers, and gaskets again. A nut is threaded onto the outside of the bolt, which is then placed inside the heat exchange tube opening. Tightening the nut causes the ball bearings to move closer to the outermost gasket. Once the ball bearings contact the outermost gasket, continued tightening of the nut compresses the packing layer and annular sealing washers between the two sets of gaskets until they are tightly fitted to the inner wall of the heat exchange tube. This effectively avoids the problem of limited compression capacity of the conical washers on the packing, which could affect the leak-sealing effect on the heat exchange tube. Furthermore, by simultaneously compressing the annular sealing washers, the leak-sealing effect on the heat exchange tube is improved. Attached Figure Description

[0018] Figure 1 This is a three-dimensional longitudinal section diagram of the heat exchange tube of this utility model; Figure 2 This is a three-dimensional structural diagram of the nut of this utility model; Figure 3 This is a schematic diagram of the three-dimensional structure of the bolt of this utility model.

[0019] In the attached diagram, the components represented by each number are as follows: 1. Heat exchange tube; 2. Bolt; 3. Gasket; 4. Packing layer; 5. Nut; 6. Connecting rod; 7. Ball bearing; 8. Annular sealing gasket; 21. Screw; 22. Head limiting block; 23. Tail limiting block. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0022] Example: Please combine Figure 1-3 This embodiment provides a heat exchanger plugging pipe device, placed at the opening of a heat exchange tube 1, comprising an abutment component, an expansion component, and a compression component, wherein the expansion component is located between the abutment component and the compression component; the abutment component includes a bolt 2 inserted into the heat exchange tube 1; the compression component includes a nut 5 screwed onto the bolt 2, a plurality of connecting rods 6 fixedly connected to the nut 5 near the bolt 2, and ball bearings 7 disposed at the ends of the connecting rods 6.

[0023] In this embodiment, the core component of the abutment assembly, bolt 2, is inserted into the heat exchange tube 1 along its axial direction, forming an axial support base. The external thread of the bolt extends to the outside of the tube opening. Nut 5 engages with the external thread of bolt 2 through its internal thread, forming an axially movable helical pair. Multiple connecting rods 6 are fixed in a circumferential array to the end face of nut 5 near the tube opening, constituting a thrust transmission mechanism. Ball bearings 7 are installed at the end of connecting rods 6 through a ball joint, forming a multi-point contact structure. The expansion assembly is sleeved on the rod of bolt 2, located between the bolt head and ball bearings 7. It is directly acted upon by the axial thrust of ball bearings 7, while also being radially constrained by the bolt head. When nut 5 is tightened, it drives connecting rods 6 and ball bearings 7 to move axially into the tube body. Ball bearings 7 form rolling contact with the expansion assembly, converting the rotational motion of the nut into axial thrust. The expansion assembly undergoes radial expansion deformation under the combined action of axial thrust and bolt radial constraint.

[0024] The expansion assembly includes two sets of gaskets 3, two sets of annular sealing gaskets 8, and a filler layer 4. The filler layer 4 is located between the two sets of annular sealing gaskets 8, and the annular sealing gaskets 8 are located between the gaskets 3.

[0025] The filler layer 4 is provided with nano-graphite components and polytetrafluoroethylene components.

[0026] The annular sealing gasket 8 is equipped with a rubber component.

[0027] The gasket 3, sealing washer 8, and filler layer 4 are all fitted onto the bolt 2.

[0028] In this embodiment, the gasket 3 acts as a rigid pressure-bearing carrier, uniformly distributing the axial thrust transmitted by the nut to the annular sealing gasket. Through the gap fit between its outer edge and the inner wall of the heat exchange tube, it restricts the overall radial movement range of the expansion assembly and guides the annular sealing gasket to undergo plastic deformation in a predetermined direction. The annular sealing gasket 8 is provided with components containing rubber material, or the annular sealing gasket 8 is entirely made of rubber material. Under pressure, it forms a progressive contact seal with the tube wall, preventing axial creep loss of the packing layer and converting the point load of the balls 7 into surface pressure, eliminating stress concentration within the packing layer 4. The packing layer 4 is provided with components made of nano-graphite / polytetrafluoroethylene composite material, or the packing layer 4 is made of nano-graphite / polytetrafluoroethylene composite material. Through cold flow characteristics, it penetrates the microscopic defects of the tube wall, undergoing anisotropic expansion under the constraint of the annular sealing gasket, achieving molecular-level adhesion to the tube wall. It can also absorb the periodic stress fluctuations caused by the thermal expansion and contraction of the heat exchange tube, maintaining a durable sealing state.

[0029] The bolt 2 includes a screw 21, and the inner end of the screw 21 is provided with a head limiting block 22 for abutting against the gasket 3.

[0030] The screw 21 has a tail limiting block 23 at its outer end, and the screw 21 is fixed by clamping the tail limiting block 23.

[0031] The head limiting block 22 is tangent to the inner wall of the heat exchange tube 1.

[0032] The tail limiting block 23 has a regular hexagonal prism structure. In this embodiment, the bolt head limiting block 22 directly abuts against the inner washer 3, forming an immovable axial stop surface; the screw 21 passes through the central through hole of the two sets of washers 3, achieving radial guidance through clearance fit. Installation and positioning are achieved by inserting a special clamping tool into the hexagonal groove of the tail limiting block 23.

[0033] In one embodiment, reference is made to the appendix. Figure 1 -Appendix Figure 3A bolt 2 is inserted inside the heat exchange tube 1. Two sets of gaskets 3 are movably fitted outside the bolt 2. A packing layer 4 is provided between the two sets of gaskets 3 and is movably fitted outside the bolt 2. A nut 5 is also threaded to the outside of the bolt 2. Four sets of connecting rods 6 are symmetrically fixed to one side of the nut 5. A ball bearing 7 is movably connected to the end of the connecting rod 6. The bolt 2 includes a screw 21. A head limiting block 22 and a tail limiting block 23 are integrally fixed to both ends of the screw 21. The side of the head limiting block 22 is a regular hexagonal structure and is tangent to the inner wall of the heat exchange tube 1. The tail limiting block 23 is a regular hexagonal prism structure. An annular sealing washer 8 is added between the two sets of gaskets 3 and the packing layer 4 and is movably fitted outside the bolt 2. The annular sealing washer 8 is made of rubber. The side of the nut 5 is also a regular hexagonal structure and has a screw hole.

[0034] The implementation principle of the heat exchanger plugging tube device is as follows: Two sets of gaskets 3, two sets of annular sealing washers 8, and packing layer 4 are sequentially placed on the outside of bolt 2 in the order of gasket 3, annular sealing washers 8, packing layer 4, annular sealing washers 8, and gasket 3. After the nut 5 is threaded onto the outside of bolt 2, bolt 2 is placed inside the opening of heat exchange tube 1. The tail limit block 23 of bolt 2 is clamped with a wrench to prevent it from rotating. By tightening nut 5, the ball 7 on the connecting rod 6 moves closer to the outermost gasket 3. When the ball 7 contacts the outermost gasket 3, as nut 5 continues to be tightened, the packing layer 4 and annular sealing washers 8 are squeezed between the two sets of gaskets 3 until they are tightly fitted to the inner wall of heat exchange tube 1. This effectively avoids the problem that the limited squeezing capacity of the conical gasket on the packing will affect the plugging effect of heat exchange tube 1. Furthermore, by squeezing the annular sealing washers 8 at the same time, the plugging effect of heat exchange tube 1 is improved.

[0035] Furthermore, the same or similar element symbols are used as far as possible in the accompanying drawings and description to refer to the same or similar parts or steps. The drawings are presented in a simplified form and are not drawn to scale. For convenience and clarity only, directional terms such as top, bottom, front, back, left, right, front, back, upward, above, above, below, behind, and front may be used to refer to the drawings. These and similar directional terms should not be construed as limiting the scope of this disclosure in any way.

Claims

1. A heat exchanger plugging tube device, placed at the inlet of a heat exchange tube (1), characterized in that, include: An abutting component, an expansion component, and a compression component, wherein the expansion component is located between the abutting component and the compression component; The abutment assembly includes a bolt (2) inserted into the heat exchange tube (1); The extrusion assembly includes a nut (5) screwed onto the bolt (2), a plurality of connecting rods (6) fixedly connected to the nut (5) on the side near the bolt (2), and ball bearings (7) disposed on the ends of the connecting rods (6).

2. The heat exchanger plugging tube device according to claim 1, characterized in that, The expansion assembly includes two sets of gaskets (3), two sets of annular sealing gaskets (8), and a filler layer (4). The filler layer (4) is located between the two sets of annular sealing gaskets (8), and the annular sealing gaskets (8) are located between the gaskets (3).

3. The heat exchanger plugging tube device according to claim 2, characterized in that, The gasket (3), sealing gasket (8) and filler layer (4) are all fitted onto the bolt (2).

4. A heat exchanger plugging tube device according to claim 2, characterized in that, The bolt (2) includes a screw (21), and the inner end of the screw (21) is provided with a head limiting block (22) for abutting against the gasket (3).

5. A heat exchanger plugging tube device according to claim 4, characterized in that, The screw (21) is provided with a tail limiting block (23) at its outer end, and the screw (21) is fixed by clamping the tail limiting block (23).

6. A heat exchanger plugging tube device according to claim 4, characterized in that, The head limiting block (22) is tangent to the inner wall of the heat exchange tube (1).

7. A heat exchanger plugging tube device according to claim 5, characterized in that, The tail limiting block (23) has a regular hexagonal prism structure.

8. A heat exchanger plugging tube device according to claim 2, characterized in that, The filler layer (4) is provided with nano-graphite components and polytetrafluoroethylene components.

9. A heat exchanger plugging tube device according to claim 2, characterized in that, The annular sealing gasket (8) is provided with a rubber component.

10. A heat exchanger plugging tube device according to claim 1, characterized in that, Four connecting rods (6) are provided on the nut (5) and are symmetrically arranged along the center of the nut (5).

Images