Novel condenser titanium tube leakproof plug

Abstract

The utility model relates to a novel condenser titanium tube leakproof plug which comprises a hexagon bolt type plug body composed of a hexagon bolt head and a threaded rod with threads. An expansion material and an expansion nut with internal threads sequentially penetrate through the screw rod and are limited by an in-pipe sealing part, and the expansion nut with the internal threads is in threaded connection with the screw rod; the diameter of a pipe orifice sealing part on the hexagon bolt type plug main body is larger than the inner diameter of the titanium pipe, a first fluororubber O-shaped ring is arranged at the part, in contact with the pipe orifice of the titanium pipe, of the pipe orifice sealing part, and a second fluororubber O-shaped ring and a third fluororubber O-shaped ring are arranged on the periphery of the pipe orifice sealing part and the periphery of the expansion nut with the internal thread respectively; the sealing part in the pipe, the expansion material and the expansion nut with the internal thread penetrate into the titanium pipe, and the head of the hexagon bolt is rotated clockwise or anticlockwise, so that the plug is mounted or dismounted. The sealing device can be used for sealing the welding seam of the titanium pipe orifice to prevent leakage.

Description

Technical Field

[0001] This utility model relates to the field of anti-leakage plug technology, and in particular to a novel anti-leakage plug for titanium tubes in condensers. Background Technology

[0002] Nylon plugs, which are widely used in the market, do not have a sealing performance for leaks at the weld seams of titanium pipes. Nylon material will loosen under stress and is not easy to tighten, resulting in an unsatisfactory sealing effect, easy aging, and short lifespan for nylon plugs.

[0003] Therefore, it is necessary to provide a new type of anti-leakage plug for titanium tubes in condensers, which can seal the weld seam at the tube opening to prevent leakage. Utility Model Content

[0004] The purpose of this invention is to provide a novel anti-leakage plug for titanium tubes in condensers, which can seal the weld seam at the tube opening to prevent leakage.

[0005] To address the problems existing in the prior art, this utility model provides a novel anti-leakage plug for condenser titanium tubes, comprising:

[0006] The hexagonal bolt plug body consists of a hexagonal bolt head and a threaded rod. A pipe opening sealing part is provided on the rod immediately adjacent to the hexagonal bolt head, and an internal pipe sealing part is provided on the rod immediately adjacent to the pipe opening sealing part. The hexagonal bolt head, the rod, the pipe opening sealing part, and the internal pipe sealing part are an integral structure.

[0007] The ring-shaped expansion material and the internally threaded expansion nut pass through the screw in sequence and are limited by the sealing part inside the tube. The internally threaded expansion nut is threadedly connected to the screw. The expansion material will deform under force.

[0008] The diameter of the sealing part of the pipe opening is larger than the inner diameter of the titanium tube. A first fluororubber O-ring is provided on the part of the sealing part of the pipe opening that contacts the opening of the titanium tube. A second fluororubber O-ring is sleeved around the inner sealing part of the pipe opening. A third fluororubber O-ring is sleeved around the internally threaded expansion nut.

[0009] The sealing part, the expansion material, and the internally threaded expansion nut are inserted into the titanium tube. The internally threaded expansion nut is fixed in a specific position inside the titanium tube by a friction pad. When the head of the hexagonal bolt is rotated clockwise, the sealing part at the tube opening moves toward the titanium tube, causing the expansion material to be compressed and deformed and expand until the first fluororubber O-ring is tightly attached to the opening of the titanium tube. When the head of the hexagonal bolt is rotated counterclockwise, the shape of the expansion material is restored.

[0010] Optionally, in the novel condenser titanium tube leak-proof plug, the hexagonal bolt plug body and the internally threaded expansion nut are made of polyetheretherketone (PEEK).

[0011] Optionally, in the novel condenser titanium tube leak-proof plug, the outer diameter of the inner sealing part, the internally threaded expansion nut, and the expansion material in the unstressed state are the same.

[0012] Optionally, in the novel condenser titanium tube leak-proof plug, the outer diameter of the inner sealing part, the internally threaded expansion nut, and the expansion material in the unstressed state is 0.5 mm smaller than the inner diameter of the titanium tube.

[0013] Optionally, in the novel condenser titanium tube anti-leakage plug, after the second fluororubber O-ring is fitted around the outer periphery of the sealing part inside the tube, the outer diameter of the second fluororubber O-ring is 0.3 mm larger than the inner diameter of the titanium tube; after the third fluororubber O-ring is fitted around the outer periphery of the internally threaded expansion nut, the outer diameter of the third fluororubber O-ring is 0.3 mm larger than the inner diameter of the titanium tube.

[0014] Optionally, in the novel condenser titanium tube anti-leakage plug, the axial cross-section of the expansion material in its undeformed state is two trapezoids, with the lower base of the trapezoid close to the inner wall of the titanium tube and the upper base of the trapezoid close to the screw.

[0015] Optionally, in the novel condenser titanium tube leak-proof plug, when the expansion material deforms under stress, the expansion material expands and tightens against the inner wall of the titanium tube.

[0016] Optionally, in the novel condenser titanium tube leak-proof plug, the inner sealing part of the tube and the internally threaded expansion nut are provided with oblique cuts, and the oblique cuts are in contact with the undeformed expansion material.

[0017] Optionally, in the novel condenser titanium tube leak-proof plug, a friction pad is provided on the side of the internally threaded expansion nut away from the expansion material.

[0018] Optionally, in the new type of condenser titanium tube anti-leakage plug, the hexagonal bolt plug body is model M12.

[0019] The novel condenser titanium tube leak-proof plug provided in this utility model employs segmented expansion and sealing technologies, and utilizes polyetheretherketone (PEEK) polymer material, giving it strong mechanical properties, high-temperature resistance, corrosion resistance, and a long service life. This novel condenser titanium tube leak-proof plug consists of a hexagonal bolt-type plug body, expansion material, an internally threaded expansion nut, and multiple fluororubber O-rings, making installation and disassembly simple. The first fluororubber O-ring, while ensuring no interference, covers the pipe weld as much as possible, providing an ideal sealing effect for leaks caused by weld damage or pinholes. This utility model has undergone airtightness testing, maintaining 8 bar for more than 15 minutes without pressure drop. Attached Figure Description

[0020] Figure 1 A side sectional view of the novel condenser titanium tube anti-leakage plug provided in this embodiment of the utility model;

[0021] Figure 2 A schematic diagram illustrating the use of the novel condenser titanium tube anti-leakage plug provided in this embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the oblique cut of the inner sealing part provided in an embodiment of this utility model;

[0023] Figure 4 A schematic diagram of the oblique cut of the internally threaded expansion nut provided in this embodiment of the utility model;

[0024] Among them, 1-Hexagonal bolt head; 2-Pipe opening sealing part; 3-Pipe inner sealing part; 4-Extension material; 5-Extension nut with internal thread; 6-Screw; 7-First fluororubber O-ring; 8-Second fluororubber O-ring; 9-Third fluororubber O-ring; 10-Friction pad; 11-Beveled cut. Detailed Implementation

[0025] The specific embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] Nylon plugs, which are widely used in the market, do not have a sealing performance for leaks at the weld seams of titanium pipes. Nylon material will loosen under stress and is not easy to tighten, resulting in an unsatisfactory sealing effect, easy aging, and short lifespan for nylon plugs.

[0028] To address the problems existing in the prior art, this utility model provides a novel anti-leakage plug for condenser titanium tubes, such as... Figure 1 As shown, the novel condenser titanium tube anti-leakage plug includes:

[0029] The hexagonal bolt type plug body is composed of a hexagonal bolt head 1 and a threaded screw 6. A pipe opening sealing part 2 is provided on the screw 6 immediately adjacent to the hexagonal bolt head 1, and an inner pipe sealing part 3 is provided on the screw 6 immediately adjacent to the pipe opening sealing part 2. The hexagonal bolt head 1, screw 6, pipe opening sealing part 2 and inner pipe sealing part 3 are an integral structure.

[0030] The annular expansion material 4 and the internally threaded expansion nut 5 pass through the screw 6 in sequence and are limited by the inner sealing part 3. The internally threaded expansion nut 5 is threadedly connected to the screw 6. The expansion material 4 will deform under force.

[0031] The diameter of the sealing portion 2 at the pipe opening is larger than the inner diameter of the titanium pipe. A first fluororubber O-ring 7 is provided at the contact point between the sealing portion 2 and the titanium pipe opening. The diameter of the first fluororubber O-ring 7 is also larger than the inner diameter of the titanium pipe. The fluororubber O-ring has properties such as high temperature resistance, oil resistance, corrosion resistance, and aging resistance. The first fluororubber O-ring 7 is used to cover the weld seam at the pipe opening, thereby sealing the weld seam of the titanium pipe opening to prevent leakage. If the weld seam at the pipe opening is not smooth enough, it can be lightly polished using a grinding tool to ensure a good sealing effect.

[0032] Furthermore, preferably, a second fluororubber O-ring 8 is fitted around the periphery of the inner sealing portion 3, and a third fluororubber O-ring 9 is fitted around the periphery of the internally threaded expansion nut 5. A friction pad 10 is provided on the side of the internally threaded expansion nut 5 away from the expansion material 4. After the second fluororubber O-ring 8 is fitted around the periphery of the inner sealing portion 3, the outer diameter of the second fluororubber O-ring 8 is 0.3 mm larger than the inner diameter of the titanium tube. After the third fluororubber O-ring 9 is fitted around the periphery of the internally threaded expansion nut 5, the outer diameter of the third fluororubber O-ring 9 is 0.3 mm larger than the inner diameter of the titanium tube. The second fluororubber O-ring 8 and the third fluororubber O-ring 9 are used to enhance the sealing effect and ensure that seawater does not leak into the tube.

[0033] Preferably, the hexagonal bolt plug body and the internally threaded expansion nut 5 are made of polyetheretherketone (PEEK), a polymer material with characteristics such as corrosion resistance, high temperature resistance, and high strength.

[0034] Furthermore, the outer diameters of the inner sealing part 3, the internally threaded expansion nut 5, and the expansion material 4 in the unstressed state are the same; in one embodiment, the outer diameters of the inner sealing part 3, the internally threaded expansion nut 5, and the expansion material 4 in the unstressed state are 0.5 mm smaller than the inner diameter of the titanium tube.

[0035] In the novel condenser titanium tube leak-proof plug, the expansion material 4, in its undeformed state, is axially sectioned according to the axis of the screw 6, and then referenced. Figure 1 Its axial cross-section is two trapezoids, with the lower base of the trapezoid close to the inner wall of the titanium tube and the upper base close to the screw 6. When the expansion material 4 deforms under stress, it expands and tightens against the inner wall of the titanium tube. Preferably, as follows... Figure 3 and 4 As shown, the inner sealing part 3 and the internally threaded expansion nut 5 are provided with oblique cuts 11, and the oblique cuts 11 are in contact with the undeformed expansion material 4.

[0036] Preferably, the hexagonal bolt plug body is of model M12, and the tightening torque of the M12 hexagonal bolt plug body can reach more than 20 Nm. This utility model suggests a tightening torque of 10 Nm.

[0037] When using the new type of condenser titanium tube leak-proof plug, the inner sealing part 3, the expansion material 4, and the internally threaded expansion nut 5 are inserted into the titanium tube. The internally threaded expansion nut 5 is fixed in a specific position inside the titanium tube by the friction pad 10. Turning the hexagonal bolt head 1 clockwise moves the pipe opening sealing part 2 toward the titanium tube, causing the expansion material 4 to be compressed and deformed, expanding and tightly adhering to the inner wall of the titanium tube until the first fluororubber O-ring 7 is tightly attached to the titanium tube opening. The installation of the new type of condenser titanium tube leak-proof plug is then complete. See [link to documentation] for a completed installation of the new type of condenser titanium tube leak-proof plug. Figure 2 Rotate the head 1 of the hexagonal bolt counterclockwise to restore the shape of the expansion material 4, pull out the sealing part 3 inside the pipe, the expansion material 4 and the internally threaded expansion nut 5, and the new type of condenser titanium tube anti-leakage plug is disassembled.

[0038] In summary, the novel condenser titanium tube leak-proof plug provided by this utility model, through the adoption of segmented expansion and sealing technologies and the use of polyetheretherketone (PEEK) polymer material, possesses the characteristics of strong mechanical properties, high temperature and corrosion resistance, and long service life. This novel condenser titanium tube leak-proof plug consists of a hexagonal bolt-type plug body, expansion material, an internally threaded expansion nut, and multiple fluororubber O-rings, making the plug easy to install and disassemble. The first fluororubber O-ring, while ensuring no interference, covers the pipe weld as much as possible, providing an ideal sealing effect for leaks caused by weld damage or pinholes. This utility model has undergone an airtightness test, maintaining 8 bar for more than 15 minutes without pressure drop.

[0039] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A novel anti-leakage plug for titanium tubes in condensers, characterized in that, include: The hexagonal bolt plug body consists of a hexagonal bolt head and a threaded rod. A pipe opening sealing part is provided on the rod immediately adjacent to the hexagonal bolt head, and an internal pipe sealing part is provided on the rod immediately adjacent to the pipe opening sealing part. The hexagonal bolt head, the rod, the pipe opening sealing part, and the internal pipe sealing part are an integral structure. The ring-shaped expansion material and the internally threaded expansion nut pass through the screw in sequence and are limited by the sealing part inside the tube. The internally threaded expansion nut is threadedly connected to the screw. The expansion material will deform under force. The diameter of the sealing part of the pipe opening is larger than the inner diameter of the titanium tube. A first fluororubber O-ring is provided on the part of the sealing part of the pipe opening that contacts the opening of the titanium tube. A second fluororubber O-ring is sleeved around the inner sealing part of the pipe opening. A third fluororubber O-ring is sleeved around the internally threaded expansion nut. The sealing part, the expansion material, and the internally threaded expansion nut are inserted into the titanium tube. The internally threaded expansion nut is fixed in a specific position inside the titanium tube by a friction pad. When the head of the hexagonal bolt is rotated clockwise, the sealing part at the tube opening moves toward the titanium tube, causing the expansion material to be compressed and deformed and expand until the first fluororubber O-ring adheres tightly to the opening of the titanium tube. When the head of the hexagonal bolt is rotated counterclockwise, the shape of the expansion material is restored.

2. The novel anti-leakage plug for condenser titanium tubes as described in claim 1, characterized in that, The hexagonal bolt plug body and the internally threaded expansion nut are made of polyetheretherketone (PEEK).

3. The novel anti-leakage plug for condenser titanium tubes as described in claim 1, characterized in that, The outer diameters of the sealing part inside the pipe, the internally threaded expansion nut, and the expansion material in the unstressed state are the same.

4. The novel anti-leakage plug for condenser titanium tubes as described in claim 3, characterized in that, The outer diameter of the sealing part inside the tube, the internally threaded expansion nut, and the expansion material in the unstressed state is 0.5 mm smaller than the inner diameter of the titanium tube.

5. The novel anti-leakage plug for condenser titanium tubes as described in claim 1, characterized in that, After the second fluororubber O-ring is fitted around the sealing part inside the tube, the outer diameter of the second fluororubber O-ring is 0.3 mm larger than the inner diameter of the titanium tube. After the third fluororubber O-ring is fitted around the internally threaded expansion nut, the outer diameter of the third fluororubber O-ring is 0.3 mm larger than the inner diameter of the titanium tube.

6. The novel anti-leakage plug for condenser titanium tubes as described in claim 1, characterized in that, In its undeformed state, the axial cross-section of the expansion material is two trapezoids, with the lower base of the trapezoid close to the inner wall of the titanium tube and the upper base of the trapezoid close to the screw.

7. The novel anti-leakage plug for condenser titanium tubes as described in claim 6, characterized in that, When the expansion material deforms under stress, it expands and tightens against the inner wall of the titanium tube.

8. The novel anti-leakage plug for condenser titanium tubes as described in claim 6, characterized in that, The inner sealing part of the pipe and the internally threaded expansion nut are provided with oblique cuts, and the oblique cuts are in contact with the undeformed expansion material.

9. The novel anti-leakage plug for condenser titanium tubes as described in claim 1, characterized in that, A friction pad is provided on the side of the internally threaded expansion nut away from the expansion material.

10. The novel anti-leakage plug for condenser titanium tubes as described in claim 1, characterized in that, The model of the hexagonal bolt plug body is M12.

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