High-sealing neck welding neck flange

Abstract

According to the high-sealing neck welding neck flange, the lower neck body rotation limiting groove, the upper neck body rotation limiting groove, the corresponding lower limiting end and the corresponding upper limiting end are arranged, so that the rotation range of the neck body is effectively limited, and the stability of flange connection is enhanced. And moreover, the contact area between the flange body and the neck body can be increased by arranging the lower neck body rotation limiting groove and the upper neck body rotation limiting groove, the path of a medium after leakage is prolonged, and the sealing performance of the flange is improved. The sealing pieces are arranged in the lower neck body rotation limiting groove and the upper neck body rotation limiting groove, and the sealing pieces are connected with the inner walls of the lower neck body rotation limiting groove and the upper neck body rotation limiting groove, the lower limiting end and the upper limiting end in a sealed mode, so that multiple sealing between the flange body and the neck bodies is achieved, and medium leakage is effectively prevented; and the safety and the reliability of flange connection are ensured.

Description

Technical Field

[0001] This utility model relates to the field of flange technology, specifically to a high-sealing necked welding flange. Background Technology

[0002] In the existing technology, split-type weld neck flanges usually have insufficient sealing performance, especially in high-pressure, high-temperature or corrosive media environments, which can easily lead to leakage, affecting the normal operation and safety of equipment. Summary of the Invention

[0003] In view of this, the present invention provides a high-sealing necked welding flange.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A high-sealing necked welding flange includes a flange body and a neck body. The neck body is detachably mounted on the flange body. The flange body has a flange through hole. The neck body has a flange connection portion and a neck body portion. A lower neck body rotation limiting groove is formed by an inward recess on the inner wall of the flange through hole. An upper neck body rotation limiting groove is formed by a downward recess on the top of the flange body. Lower and upper limit ends corresponding to the lower and upper neck body rotation limiting grooves are formed on the flange connection portion and the neck body portion, respectively. The lower and upper limit ends extend into the lower and upper neck body rotation limiting grooves and connect to the flange body. A sealing element is provided in the lower and upper neck body rotation limiting grooves. The sealing element fits against the inner wall of the lower and upper neck body rotation limiting grooves and is in sealing contact with the inner wall of the lower and upper neck body rotation limiting grooves, as well as the lower and upper limit ends.

[0006] Preferably, the lower neck body rotation limiting groove and the upper neck body rotation limiting groove are provided at equal intervals, and the lower neck body rotation limiting groove and the upper neck body rotation limiting groove are staggered.

[0007] Preferably, the sealing element is made of rubber, and the sealing element has a fixing surface and a sealing surface. The fixing surface is bonded and fixed to the inner wall of the lower neck body rotation limiting groove / upper neck body rotation limiting groove, and the sealing element is sealed to the lower limiting end / upper limiting end.

[0008] Preferably, the sealing surface of the seal has several horizontal strip-shaped protrusions, and the lower limit end / upper limit end presses against the horizontal strip-shaped protrusions.

[0009] Preferably, a flange connecting block is provided on the neck body, a flange connecting hole is provided on the flange connecting block, a positioning hole is provided on the flange body corresponding to the flange connecting hole, and a positioning threaded pin is provided on the flange connecting block. The positioning threaded pin passes through the flange connecting hole and extends into the positioning hole to connect the flange body and the flange connecting hole.

[0010] Preferably, the widths of the lower neck body rotation limiting groove and the upper neck body rotation limiting groove are the same.

[0011] Preferably, both the flange body and the neck are made of stainless steel.

[0012] The beneficial effects of this utility model are as follows: By setting a detachable connection structure between the flange body and the neck, the installation and disassembly of the flange body and the neck become more convenient, thereby improving the maintenance efficiency of the equipment. Furthermore, by setting a lower neck rotation limiting groove and an upper neck rotation limiting groove, along with corresponding lower and upper limit ends, the rotation range of the neck is effectively limited, enhancing the stability of the flange connection. Moreover, by setting the lower and upper neck rotation limiting grooves, the contact area between the flange body and the neck is increased, extending the path of the medium after leakage, further improving the sealing performance of the flange. Furthermore, by setting sealing elements within the lower and upper neck rotation limiting grooves, and utilizing these sealing elements to seal against the inner walls of the lower and upper neck rotation limiting grooves, as well as the lower and upper limit ends, multiple seals are achieved between the flange body and the neck, effectively preventing medium leakage and ensuring the safety and reliability of the flange connection. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Appendix Figure 2 This is an exploded view of the structure of this utility model;

[0016] Appendix Figure 3 This is a cross-sectional view of the present invention. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] This utility model provides the following technical solution:

[0020] As attached Figure 1-3 As shown, this utility model discloses a high-sealing necked welding flange, including a flange body 1 and a neck 2, both of which are made of stainless steel. The neck 2 is detachably mounted on the flange body 1. The flange body 1 has a flange through hole 3. The neck 2 has a flange connecting part 4 and a neck part 5. The inner wall of the flange through hole 3 is recessed to form a lower neck rotation limiting groove 6. The top of the flange body 1 is recessed to form an upper neck rotation limiting groove 7. The flange connecting part 4 and the neck part 5 protrude to form corresponding lower neck rotation grooves. The lower limit end 8 and upper limit end 9 of the limiting groove 6 and the upper neck body rotation limiting groove 7 respectively extend into the lower neck body rotation limiting groove 6 and the upper neck body rotation limiting groove 7 and connect with the flange body 1. A sealing element 10 is provided inside the lower neck body rotation limiting groove 6 and the upper neck body rotation limiting groove 7. The sealing element 10 fits against the inner wall of the lower neck body rotation limiting groove 6 and the upper neck body rotation limiting groove 7, and is in a sealed connection with the inner wall of the lower neck body rotation limiting groove 6 and the upper neck body rotation limiting groove 7, as well as the lower limit end 8 and the upper limit end 9. Specifically, in this design, by setting a detachable connection structure between the flange body 1 and the neck body 2, the installation and disassembly of the flange body 1 and the neck body 2 become more convenient, thereby improving the maintenance efficiency of the equipment. Furthermore, by setting the lower neck body rotation limiting groove 6 and the upper neck body rotation limiting groove 7, along with the corresponding lower limiting end 8 and upper limiting end 9, the rotation range of the neck body 2 is effectively limited, enhancing the stability of the flange connection. Moreover, by setting the lower neck body rotation limiting groove 6 and the upper neck body rotation limiting groove 7, the contact area between the flange body 1 and the neck body 2 is increased, extending the path of the medium after leakage, further improving the sealing performance of the flange. Furthermore, by setting the sealing element 10 within the lower neck body rotation limiting groove 6 and the upper neck body rotation limiting groove 7, and utilizing the sealing element 10 to seal against the inner walls of the lower neck body rotation limiting groove 6 and the upper neck body rotation limiting groove 7, as well as the lower limiting end 8 and the upper limiting end 9, multiple seals are achieved between the flange body 1 and the neck body 2, effectively preventing medium leakage and ensuring the safety and reliability of the flange connection.

[0021] Furthermore, several lower neck body rotation limiting grooves 6 and upper neck body rotation limiting grooves 7 are evenly spaced, and the lower neck body rotation limiting grooves 6 and upper neck body rotation limiting grooves 7 are staggered. Specifically, in this embodiment, the staggered arrangement of the lower neck body rotation limiting grooves 6 and upper neck body rotation limiting grooves 7 not only enhances the connection strength between the flange body 1 and the neck body 2, but also further optimizes the sealing effect. This design allows each limiting groove to exert its maximum sealing effect, effectively preventing media leakage even under high pressure or high temperature environments. At the same time, the equidistant arrangement ensures the uniformity and stability of the flange connection, avoiding connection failure caused by excessive local stress.

[0022] Furthermore, the sealing element 10 is made of rubber and has a fixing surface 11 and a sealing surface 12. The fixing surface 11 is bonded and fixed to the inner wall of the lower neck rotation limiting groove 6 / upper neck rotation limiting groove 7, and the sealing element 10 is sealed to the lower limiting end 8 / upper limiting end 9. Specifically, in this embodiment, the rubber sealing element 10 has good elasticity and corrosion resistance, and can adapt to various complex working environments. The fixing surface 11 is bonded and fixed to the inner wall of the lower neck rotation limiting groove 6 and the upper neck rotation limiting groove 7, ensuring the stability of the sealing element 10 and preventing it from falling off. At the same time, the sealing surface 12 is tightly fitted to the lower limiting end 8 and the upper limiting end 9, achieving an effective sealing effect. This design not only improves the sealing performance of the flange but also extends the service life of the sealing element 10 and reduces maintenance costs.

[0023] Furthermore, the sealing surface 12 of the seal 10 has several horizontally shaped protrusions, and the lower limit end 8 and the upper limit end 9 press against these horizontally shaped protrusions (not shown in the figure). Specifically, in this embodiment, the design of the horizontally shaped protrusions further enhances the sealing effect between the seal 10 and the lower limit end 8 and the upper limit end 9. When the neck 2 is connected to the flange body 1, the lower limit end 8 and the upper limit end 9 press against these horizontally shaped protrusions, forming a tighter contact and effectively preventing the medium from leaking through tiny gaps. This design not only improves the sealing performance of the flange but also increases the stability of the seal 10, enabling it to maintain excellent sealing performance in various working environments. At the same time, the horizontally shaped protrusions also have a certain degree of elasticity, which can adapt to the slight deformation of the neck 2 during rotation, further ensuring the reliability and safety of the flange connection.

[0024] Furthermore, a flange connecting block 14 is provided on the neck body 2, and a flange connecting hole 15 is formed on the flange connecting block 14. A positioning hole 16 is provided on the flange body 1 corresponding to the flange connecting hole 15. A positioning threaded pin 17 is provided on the flange connecting block 14. The positioning threaded pin 17 passes through the flange connecting hole 15 and extends into the positioning hole 16 to connect the flange body 1 and the flange connecting hole 15. Specifically, in this embodiment, by providing a flange connecting block 14 on the neck body 2 and forming a flange connecting hole 15 on the flange connecting block 14, and simultaneously providing a positioning hole 16 on the flange body 1, and using a positioning threaded pin 17 to pass through the flange connecting hole 15 and extend into the positioning hole 16 for connection, precise positioning and stable connection between the flange body 1 and the neck body 2 are achieved. This connection method not only improves the accuracy and stability of the flange connection, but also facilitates the installation and disassembly process, further improving the maintenance efficiency of the equipment.

[0025] Furthermore, the lower neck body rotation limiting groove 6 and the upper neck body rotation limiting groove 7 have the same width. Specifically, in this embodiment, the lower neck body rotation limiting groove 6 and the upper neck body rotation limiting groove 7 have the same width, ensuring the stability and sealing performance of the sealing element 10 within the lower neck body rotation limiting groove 6 and the upper neck body rotation limiting groove 7. This design makes the sealing element 10 less susceptible to damage during installation and disassembly, while ensuring a tight fit between the sealing element 10 and the lower limiting end 8 and the upper limiting end 9, further improving the sealing performance of the flange. In addition, the lower neck body rotation limiting groove 6 and the upper neck body rotation limiting groove 7 with the same width also help simplify the production process, reduce manufacturing costs, and improve production efficiency.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high seal band necked butt flange comprising a flange body and a neck body, the neck body being removably disposed on the flange body, characterized in that: The flange body is provided with a flange through hole, the neck body is provided with a flange connecting part and a neck body part, an inner wall of the flange through hole is concave to form a lower neck body rotation limiting groove, a top of the flange body is concave to form an upper neck body rotation limiting groove, the flange connecting part and the neck body part are convex to form a lower limiting end and an upper limiting end corresponding to the lower neck body rotation limiting groove and the upper neck body rotation limiting groove, the lower limiting end and the upper limiting end respectively extend into the lower neck body rotation limiting groove and the upper neck body rotation limiting groove to connect with the flange body, a sealing element is arranged in the lower neck body rotation limiting groove and the upper neck body rotation limiting groove, the sealing element is attached to inner walls of the lower neck body rotation limiting groove and the upper neck body rotation limiting groove, and the sealing element is sealed with the inner walls of the lower neck body rotation limiting groove and the upper neck body rotation limiting groove and the lower limiting end and the upper limiting end.

2. The high-seal band-necked butt-welded flange according to claim 1, characterized in that: The lower neck body rotation limiting grooves and the upper neck body rotation limiting grooves are arranged at equal intervals.

3. The high-seal band-necked butt-welded flange according to claim 1, characterized in that: The sealing element is made of rubber, and has a fixed surface and a sealing surface, the fixed surface is fixedly attached to the inner walls of the lower neck body rotation limiting groove / upper neck body rotation limiting groove, and the sealing surface is sealed with the lower limiting end / upper limiting end.

4. The high seal band necked flange of claim 3 wherein: The sealing surface of the sealing element is convex to form a plurality of transverse strip-shaped convex parts, and the lower limiting end / upper limiting end is pressed against the transverse strip-shaped convex parts.

5. The high-seal band necked flange of claim 1, wherein: The neck body is provided with a flange connecting block, the flange connecting block is provided with a flange connecting hole, the flange body is provided with a positioning hole corresponding to the flange connecting hole, the flange connecting block is provided with a positioning threaded pin, and the positioning threaded pin extends through the flange connecting hole into the positioning hole to connect the flange body and the flange connecting hole.

6. The high seal band necked flange of claim 2 wherein: The lower neck body rotation limiting grooves and the upper neck body rotation limiting grooves have the same width.

7. The high-seal band-necked butt-welded flange according to claim 1, characterized in that: The flange body and the neck body are made of stainless steel.

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