Metal sealing assembly

Abstract

The invention relates to the technical field of sealing, in particular to a metal sealing assembly which comprises a connecting pipe, a first sealing ring is arranged at the position, close to the left end, of the connecting pipe and surrounds the outer wall, a first threaded section is arranged on the portion, on the left side of the first sealing ring, of the outer wall of the connecting ring, and a second sealing ring is connected to the first threaded section in a threaded fit mode. A threaded hole penetrating through the left side and the right side is formed in the second sealing ring, a sealing bolt is connected into the threaded hole in a matched mode through threads, a pressure relief hole penetrating through the inside and the outside is formed in the position, on the right side of the first sealing ring, of the connecting pipe, and a pressure relief valve communicating with the pressure relief hole in an aligned mode is installed on the outer wall of the connecting pipe. The inner wall and the outer wall of the box body are clamped through the first sealing ring and the second sealing ring to seal the mounting hole of the box body, and compared with a traditional welding mode, the mounting mode can easily detach the connecting pipe for replacement or maintenance when the connecting pipe breaks down.

Description

Technical Field

[0001] The invention relates to the technical field of sealing, and in particular to a metal sealing component. Background Art

[0002] In various fields of modern industry, the application of sealing components is ubiquitous, and the quality of sealing performance is directly related to the normal operation, working efficiency and safety of equipment. Metal sealing components have become the first choice in many key application scenarios due to their excellent performance under extreme conditions such as high temperature, high pressure, and corrosive environment. In industrial production and various systems, the connection between the box and the pipeline is a common and critical link, and the quality of its sealing performance directly affects the operating efficiency and safety of the entire system. For a long time, the traditional connection method mainly uses welded flanges to achieve the connection between the box and the pipeline.

[0003] However, this welding flange connection method has many obvious disadvantages. First of all, the welding operation itself requires professional technology and experience, and requires high skills of the operator. In actual operation, not only complex welding process preparation is required, such as the commissioning of welding equipment and the selection of welding materials, but also the welding process is easily affected by environmental factors such as temperature and humidity, which affects the welding quality.

[0004] Secondly, welding operations are usually time-consuming, increasing the production and installation cycle. Moreover, once welding is completed, if the connection parts need to be maintained, replaced or adjusted later, the process of dismantling and re-welding will be extremely cumbersome and may even cause damage to the box and pipes.

[0005] In addition, since welding is a permanent connection method, it lacks flexibility and adjustability and cannot meet some application scenarios that require frequent disassembly and installation.

[0006] In view of the various shortcomings of the above-mentioned traditional welding flange connection method, it is of great practical significance to develop a metal sealing component that is easy to install. This new sealing component should be able to simplify the installation and disassembly process, improve work efficiency, and reduce maintenance costs while ensuring good sealing performance. At the same time, it should have strong adaptability and adjustability to meet the needs of different working conditions and application scenarios. Summary of the invention

[0007] The purpose of the present invention is to provide a metal sealing assembly to solve the problem in the prior art that a box body is flange-jointed with a pipeline by means of a welding flange, and subsequent maintenance and replacement are extremely complicated.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions: A metal sealing assembly includes a connecting pipe, wherein a first sealing ring is arranged around the outer wall of the connecting pipe near the left end, a first threaded section is arranged on the outer wall of the connecting ring on the left side of the first sealing ring, a second sealing ring is threadedly connected to the first threaded section, a threaded hole passing through the left and right sides is arranged on the second sealing ring, a sealing bolt is threadedly connected to the threaded hole, a pressure relief hole passing through the inside and outside is arranged on the right side of the first sealing ring, and a pressure relief valve aligned with and connected to the pressure relief hole is installed on the outer wall of the connecting pipe.

[0009] A further technical solution is that a sealing layer is provided on the left side of the first sealing ring, and a screwing groove is provided in a depression on the outer wall of the second sealing ring; and a plurality of threaded holes and sealing bolts are provided in a matching manner on the second sealing ring.

[0010] A further technical solution is that the pressure relief valve includes a pressure relief pipe and a valve core, the pressure relief pipe is vertically installed on the outer wall of the connecting pipe and is aligned with the pressure relief hole, the inner wall of the pressure relief pipe is successively raised from bottom to top and provided with a third sealing ring and a support ring, the valve core is vertically arranged in the pressure relief pipe, the middle part of the valve core is provided with a support plane facing upward, the upper part of the valve core is sealingly and slidingly connected to the inner wall of the support ring, the lower end of the valve core is in contact with the third sealing ring to seal the inner hole of the third sealing ring, the outer wall sleeve of the upper part of the valve core is provided with a spring, the upper end of the spring is in contact with the lower side of the support ring, and the lower end is in contact with the support plane, the upper end of the valve core is provided with a pressure relief core hole, the side of the valve core near the lower end is provided with a connecting hole connected to the pressure relief core hole, and a gap is left between the outer wall of the valve core and the inner wall of the pressure relief pipe.

[0011] A further technical solution is that the inner diameter of the third sealing ring gradually decreases from top to bottom to form a first inclined surface, and the edge of the lower end of the valve core is provided with a second inclined surface matching the first inclined surface.

[0012] A further technical solution is that a mounting ring groove is arranged around the second inclined surface depression, a sealing ring is installed in the mounting ring groove, and the sealing ring protrudes out of the mounting ring groove.

[0013] A further technical solution is that a fourth sealing ring is protruding from the inner wall of the pressure relief pipe between the third sealing ring and the support ring, the fourth sealing ring is sealingly and slidingly connected to the outer wall of the lower part of the valve core, and the connecting hole is located at one end of the valve core surface below the fourth sealing ring.

[0014] A further technical solution is that the inner wall of the third sealing ring is provided with an annular sealing plane at the lower side of the first inclined surface, and a sealing plate with a diameter larger than the inner diameter of the sealing plane is installed at the lower end of the valve core, and the sealing plate is sealed against the sealing plane.

[0015] A further technical solution is that an insertion hole is provided on the lower side of the valve core, an insertion rod is provided on the upper side of the sealing plate, and the insertion rod is clamped in the insertion hole.

[0016] A further technical solution is that the outer wall of the support ring is provided with a second thread segment, and the inner wall of the pressure relief pipe is provided with a third thread segment that matches the thread of the second thread segment.

[0017] Compared with the prior art, the invention has the following beneficial effects: 1. When installing the connecting pipe, it is only necessary to open a corresponding installation hole on the box body to be sealed, and then insert the part of the connecting pipe located on the left side of the first sealing ring from the outside of the box body into the inside of the box body, and then fix the second sealing ring to the connecting pipe through the first threaded section inside the box body, and the first sealing ring and the second sealing ring clamp the inner and outer walls of the box body to seal the installation hole of the box body. Compared with the traditional welding method, this installation method can easily remove the connecting pipe for replacement or repair when the connecting pipe fails; 2. By providing the threaded hole and the sealing bolt, after tightening the second sealing ring, the first sealing ring can be more closely fitted to the outer wall of the box body by tightening the sealing bolt, and the second sealing ring can be prevented from rotating and loosening on the connecting pipe by the sealing bolt, so that the sealing between the connecting pipe and the box body can be improved, and a stable sealing effect can be provided during long-term use; 3. By providing the pressure relief hole and the pressure relief valve, when used in some boxes with pressure, the pressure increase in the box body and the connecting pipe can be alleviated by the pressure relief valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a metal sealing assembly of the present invention being installed on a box body.

[0019] Figure 2 The figure is a cross-sectional schematic diagram of a metal sealing assembly of the present invention.

[0020] Figure 3 The figure is a schematic cross-sectional view of a pressure relief valve of a metal sealing assembly according to the present invention.

[0021] Icon: 1-connecting pipe, 2-first sealing ring, 3-second sealing ring, 4-threaded hole, 5-sealing bolt, 6-pressure relief hole, 7-pressure relief valve, 8-sealing layer, 9-screw groove, 10-pressure relief pipe, 11-valve core, 12-third sealing ring, 13-support ring, 14-support plane, 15-spring, 16-pressure relief core hole, 17-connecting hole, 18-first inclined plane, 19-second inclined plane, 20-sealing ring, 21-fourth sealing ring, 22-sealing plane, 23-sealing plate, 24-insertion hole, 25-insertion rod, 26-box body. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Figures 1 to 3 An embodiment of the present invention is shown.

[0024] Embodiment 1: A metal sealing assembly includes a connecting pipe 1, wherein a first sealing ring 2 is arranged around the outer wall of the connecting pipe 1 near the left end, a first threaded section is arranged on the outer wall of the connecting ring on the left side of the first sealing ring 2, a second sealing ring 3 is threadedly connected to the first threaded section, a threaded hole 4 passing through the left and right sides is arranged on the second sealing ring 3, a sealing bolt 5 is threadedly connected to the inner thread of the threaded hole 4, a pressure relief hole 6 passing through the inside and outside is arranged on the right side of the first sealing ring 2, and a pressure relief valve 7 aligned and connected to the pressure relief hole 6 is installed on the outer wall of the connecting pipe 1. When installing the connecting pipe 1, it is only necessary to open a corresponding installation hole on the box body 26 to be sealed, and then insert the part of the connecting pipe 1 located on the left side of the first sealing ring 2 from the outside of the box body 26 into the inside of the box body 26, and then fix the second sealing ring 3 to the connecting pipe 1 through the first threaded section inside the box body 26, and the first sealing ring 2 and the second sealing ring 3 clamp the inner and outer walls of the box body 26 to seal the installation hole of the box body 26. Compared with the traditional welding method, this installation method can easily remove the connecting pipe 1 for replacement or maintenance when the connecting pipe 1 fails. By providing the threaded hole 4 and the sealing bolt 5, after tightening the second sealing ring 3, the first sealing ring 2 can be more closely fitted to the outer wall of the box body 26 by tightening the sealing bolt 5, and the second sealing ring 3 can also be prevented from rotating and loosening on the connecting pipe 1 by the sealing bolt 5, so that the sealing between the connecting pipe 1 and the box body 26 can be improved, and a stable sealing effect can be provided during long-term use. By providing the pressure relief hole 6 and the pressure relief valve 7, when used in some pressure-containing boxes 26, the pressure increase in the box 26 and the connecting pipe 1 can be relieved by the pressure relief valve 7. The connecting pipe 1, the first sealing ring 2, and the second sealing ring 3 are all made of high-strength corrosion-resistant metal materials, such as stainless steel or alloy materials, and can withstand external forces without deformation during installation, so that sufficient pressure can be generated on the inner and outer walls of the box 26 to achieve a tight sealing effect.

[0025] A sealing layer 8 is provided on the left side of the first sealing ring 2, and a screw groove 9 is provided in a recessed manner on the outer wall of the second sealing ring 3; a plurality of threaded holes 4 and sealing bolts 5 are provided on the second sealing ring 3. By providing the sealing layer 8, the sealing performance between the first sealing ring 2 and the outer wall of the box body 26 can be improved. By providing the screw groove 9, the second sealing ring 3 can be driven to rotate by inserting an external tool, which facilitates the installation of the second sealing ring 3. By providing a plurality of threaded holes 4 and sealing bolts 5, the inner wall of the box body 26 can be supported evenly.

[0026] The pressure relief valve 7 includes a pressure relief pipe 10 and a valve core 11. The pressure relief pipe 10 is vertically installed on the outer wall of the connecting pipe 1 and is aligned with the pressure relief hole 6. The inner wall of the pressure relief pipe 10 is provided with a third sealing ring 12 and a support ring 13 protruding from bottom to top. The valve core 11 is vertically arranged in the pressure relief pipe 10. The middle part of the valve core 11 is provided with a support plane 14 facing upward. The upper part of the valve core 11 is sealingly and slidably connected to the inner wall of the support ring 13, and the lower end of the valve core 11 is connected to the third sealing ring 12 and the support ring 13. The three sealing rings 12 are in contact with each other and are used to seal the inner hole of the third sealing ring 12. A spring 15 is sleeved on the outer wall of the upper part of the valve core 11. The upper end of the spring 15 is in contact with the lower side of the support ring 13, and the lower end is in contact with the support plane 14. A pressure relief core hole 16 is provided at the upper end of the valve core 11. A connecting hole 17 connected to the pressure relief core hole 16 is provided on the side of the valve core 11 near the lower end. A gap is left between the outer wall of the valve core 11 and the inner wall of the pressure relief pipe 10. After the pressure relief valve 7 is installed, the spring 15 is in a pre-compression state, and with the help of the support ring 13 and the support plane 14, a downward thrust is generated on the valve core 11, so that the lower end of the valve core 11 is tightly fitted with the third sealing ring 12. The compression length and pre-compression force of the spring 15 are adjusted according to the needs, and springs 15 of different sizes can be selected. When the pressure in the connecting pipe 1 is less than the thrust generated by the spring 15, the lower end of the valve core 11 closes the inner hole of the third sealing ring 12. When the pressure in the connecting pipe 1 is greater than the thrust generated by the spring 15, the valve core 11 moves upward under the action of the pressure in the connecting pipe 1 to compress the spring 15. At this time, the lower end of the valve core 11 is separated from the third sealing ring 12, so that the liquid, gas, etc. in the connecting pipe 1 will enter the pressure relief pipe 10, pass through the connecting hole 17 in the pressure relief pipe 10 and enter the pressure relief core hole 16, and then be discharged from the upper end of the pressure relief pipe 10 to relieve the pressure. The upper end of the pressure relief pipe 10 can be connected to a dedicated pressure relief pipe 10.

[0027] The inner diameter of the third sealing ring 12 gradually decreases from top to bottom to form a first inclined surface 18, and the edge of the lower end of the valve core 11 is provided with a second inclined surface 19 that matches the first inclined surface 18. By providing the second inclined surface 19, on the one hand, the valve core 11 can be accurately sealed with the third sealing ring 12 when sealing, and at the same time, the contact area between the valve core 11 and the third sealing ring 12 when sealing can be increased by means of the first inclined surface 18 and the second inclined surface 19, thereby improving the sealing effect.

[0028] A mounting ring groove is provided around the second inclined surface 19, and a sealing ring 20 is installed in the mounting ring groove, and the sealing ring 20 protrudes from the mounting ring groove. By providing the sealing ring 20, the sealing effect between the first inclined surface 18 and the second inclined surface 19 can be improved.

[0029] The inner wall of the pressure relief pipe 10 is provided with a fourth sealing ring 21 protruding between the third sealing ring 12 and the support ring 13. The fourth sealing ring 21 is sealingly and slidably connected to the outer wall of the lower part of the valve core 11, and the connecting hole 17 is located at one end of the surface of the valve core 11 and is placed below the fourth sealing ring 21. By providing the fourth sealing ring 21, on the one hand, the valve core 11 can move up and down smoothly, and at the same time, the space between the upper and lower parts of the pressure relief pipe 10 located at the fourth sealing ring 21 can be isolated to prevent the liquid or gas in the pressure relief pipe 10 from entering the upper part of the fourth sealing ring 21 and affecting the spring 15. With the help of the support ring 13 and the fourth sealing ring 21, a closed space is formed at the position of the spring 15, and the air in the closed space is compressed when the spring 15 is compressed. The inner walls of the support ring 13 and the fourth sealing ring 21 are both provided with sealing ring sheets for sealing the gap.

[0030] The inner wall of the third sealing ring 12 is provided with an annular sealing plane 22 at the lower side of the first inclined surface 18, and a sealing flat plate 23 having a diameter larger than the inner diameter of the sealing plane 22 is installed at the lower end of the valve core 11, and the sealing flat plate 23 is sealed and fitted with the sealing plane 22. By providing the sealing plane 22 and the sealing flat plate 23, a double sealing effect can be achieved in cooperation with the first inclined surface 18 and the second inclined surface 19, so that when pressure relief is not required, the sealing effect of the pressure relief valve 7 can be improved to avoid leakage affecting the pressure in the box body 26 and the connecting pipe 1.

[0031] An insertion hole 24 is provided at the lower side of the valve core 11, and an insertion rod 25 is provided at the upper side of the sealing plate 23, and the insertion rod 25 is clamped in the insertion hole 24. Such a configuration is easy to install, disassemble and replace, and when the pressure is released, the sealing plate 23 is always pressed against the lower end of the valve core 11 due to the pressure, and the sealing plate 23 will not fall off.

[0032] The outer wall of the support ring 13 is provided with a second thread segment, and the inner wall of the pressure relief pipe 10 is provided with a third thread segment that matches the thread of the second thread segment. With such a configuration, the valve core 11 can be replaced by removing the support ring 13. A disassembly hole can be recessed on the upper side of the support ring 13, and an external tool can be inserted into the disassembly hole to drive the support ring 13 to rotate.

[0033] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and modifications may be made to the components and / or layout of the subject combination layout. In addition to the variations and modifications made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A metal sealing assembly, comprising a connecting pipe (1), characterized in that: The connecting pipe (1) is provided with a first sealing ring (2) around the outer wall at a position close to the left end, the outer wall of the connecting ring is provided with a first threaded section on the left side of the first sealing ring (2), a second sealing ring (3) is threadedly connected to the first threaded section, a threaded hole (4) passing through the left and right sides is provided on the second sealing ring (3), the inner thread of the threaded hole (4) is threadedly connected to a sealing bolt (5), the connecting pipe (1) is provided with a pressure relief hole (6) passing through the inside and outside on the right side of the first sealing ring (2), and a pressure relief valve (7) aligned with and connected to the pressure relief hole (6) is installed on the outer wall of the connecting pipe (1).

2. A metal sealing assembly according to claim 1, characterized in that: A sealing layer (8) is provided on the left side of the first sealing ring (2), and a screwing groove (9) is provided in a recessed manner on the outer wall of the second sealing ring (3); a plurality of threaded holes (4) and sealing bolts (5) are provided in a matching manner on the second sealing ring (3).

3. A metal sealing assembly according to claim 1, characterized in that: The pressure relief valve (7) comprises a pressure relief pipe (10) and a valve core (11); the pressure relief pipe (10) is vertically mounted on the outer wall of the connecting pipe (1) and aligned with the pressure relief hole (6); the inner wall of the pressure relief pipe (10) is provided with a third sealing ring (12) and a support ring (13) protruding from bottom to top in sequence; the valve core (11) is vertically arranged in the pressure relief pipe (10); a support plane (14) facing upward is provided in the middle of the valve core (11); the upper part of the valve core (11) is sealingly and slidably connected to the inner wall of the support ring (13); and the lower end of the valve core (11) is provided with a support plane (14) facing upward. The valve core (11) is in contact with the third sealing ring (12) to seal the inner hole of the third sealing ring (12). The outer wall of the upper part of the valve core (11) is provided with a spring (15). The upper end of the spring (15) is in contact with the lower side of the support ring (13), and the lower end is in contact with the support plane (14). The upper end of the valve core (11) is provided with a pressure relief core hole (16). The side surface of the valve core (11) close to the lower end is provided with a connecting hole (17) connected to the pressure relief core hole (16). A gap is left between the outer wall of the valve core (11) and the inner wall of the pressure relief pipe (10).

4. A metal sealing assembly according to claim 3, characterized in that: The inner diameter of the third sealing ring (12) gradually decreases from top to bottom to form a first inclined surface (18), and the edge of the lower end of the valve core (11) is provided with a second inclined surface (19) matching the first inclined surface (18).

5. A metal sealing assembly according to claim 4, characterized in that: A mounting ring groove is recessed around the second inclined surface (19), a sealing ring (20) is mounted in the mounting ring groove, and the sealing ring (20) protrudes out of the mounting ring groove.

6. A metal sealing assembly according to claim 3, characterized in that: The inner wall of the pressure relief pipe (10) is provided with a fourth sealing ring (21) protruding between the third sealing ring (12) and the support ring (13); the fourth sealing ring (21) is sealingly and slidably connected to the outer wall of the lower part of the valve core (11); and one end of the connecting hole (17) located on the surface of the valve core (11) is placed below the fourth sealing ring (21).

7. A metal sealing assembly according to claim 3, characterized in that: The inner wall of the third sealing ring (12) is provided with an annular sealing plane (22) at the lower side of the first inclined surface (18), and the lower end of the valve core (11) is provided with a sealing flat plate (23) having a diameter greater than the inner diameter of the sealing plane (22), and the sealing flat plate (23) is sealingly fitted to the sealing plane (22).

8. A metal sealing assembly according to claim 7, characterized in that: An insertion hole (24) is provided on the lower side of the valve core (11), and an insertion rod (25) is provided on the upper side of the sealing plate (23), wherein the insertion rod (25) is clamped in the insertion hole (24).

9. A metal sealing assembly according to claim 3, characterized in that: The outer wall of the support ring (13) is provided with a second thread segment, and the inner wall of the pressure relief pipe (10) is provided with a third thread segment that matches the thread of the second thread segment.

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