CN213576089U

CN213576089U - Sealing bolt for connecting pipeline flange

Info

Publication number: CN213576089U
Application number: CN202022179733.XU
Authority: CN
Inventors: 李国良
Original assignee: Suzhou Zhaowuyi Precision Hardware Co ltd
Current assignee: Suzhou Zhaowuyi Precision Hardware Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-06-29
Anticipated expiration: 2030-09-29

Abstract

A sealing bolt for connecting a pipeline flange comprises a bolt, a sealing structure, a first nut and a second nut, wherein the sealing structure, the first nut and the second nut are sequentially arranged on the bolt; the sealing structure comprises a sealing assembly, a limiting ring and a positioning ring, wherein the limiting ring and the positioning ring are respectively arranged at two ends of the sealing assembly. When fastening first flange and second flange, at first adorn the bolt with sealed structure on, then adorn it in the connecting hole of first flange and second flange, loop through first nut and second nut and carry out double locking to not only improve its connection leakproofness, double locking has avoided in the use phenomenon because of the pine takes off to appear in the condition such as vibration. Wherein, according to the difference of the first flange of connecting and second flange, select different spacing rings to carry on spacingly to seal assembly, rethread position ring is fixed, uses in the flange joint of different model sizes.

Description

Sealing bolt for connecting pipeline flange

Technical Field

The utility model relates to a fastener field especially relates to a sealing bolt is used in pipeline flange connection.

Background

In various pipe works, pipe flanges of different pipes are fastened together by bolts, so that pipe connection systems of different shapes are formed.

However, the bolts currently used have the following disadvantages: 1) liquid in the pipeline is easy to leak out from the connecting gap between the bolt and the flange, so that loss of the transmitted liquid is caused, and the use efficiency of the pipeline is reduced; 2) the screw rod and the liquid of bolt contact for a long time, lead to its surface to appear rusty or corrosion phenomena easily to influence the threaded connection of bolt and corresponding nut, this not only leads to dismantling the difficulty, has increased workman's maintenance work load, need regularly change the bolt moreover, avoid appearing connecting not the fastening and lead to revealing the condition, thereby increased the consume cost.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a pipeline flange joint uses sealing bolt, its bolt existence's when having solved pipeline flange joint problem.

The technical scheme is as follows: the utility model provides a sealing bolt for connecting a pipeline flange, which comprises a bolt, a sealing structure, a first nut and a second nut, wherein the sealing structure, the first nut and the second nut are sequentially arranged on the bolt; the sealing structure comprises a sealing assembly, a limiting ring and a positioning ring, wherein the limiting ring and the positioning ring are respectively arranged at two ends of the sealing assembly. When fastening first flange and second flange, at first adorn the bolt with sealed structure on, then adorn it in the connecting hole of first flange and second flange, loop through first nut and second nut and carry out double locking to not only improve its connection leakproofness, double locking has avoided in the use phenomenon because of the pine takes off to appear in the condition such as vibration. Wherein, according to the difference of the first flange of connecting and second flange, select different spacing rings to carry on spacingly to seal assembly, rethread position ring is fixed, uses in the flange joint of different model sizes.

Further, the total length of the sealing structure is not more than the sum of the thicknesses of the flange plates of the first flange and the second flange to be connected. The first flange and the second flange can not be locked by the first nut and the second nut due to the fact that the size of the sealing structure is too long.

Further, the seal assembly comprises a seal main body, a first seal ring and a second seal ring, wherein the first seal ring and the second seal ring are sequentially arranged on the seal main body. The first sealing ring and the second sealing ring are respectively positioned on the flange side edges of the first flange and the second flange, so that liquid is prevented from coming out of a gap between the first flange and the second flange and corroding bolts, and a better sealing effect is achieved.

Furthermore, a first groove and a second groove are formed in the sealing main body, and the first groove and the second groove are formed in the outer side of the sealing main body. The first groove and the second groove are used for placing a first sealing ring and a second sealing ring respectively.

Further, the inside of the sealing main body is provided with threads. The seal body and the bolt are connected through threads.

Furthermore, the limiting ring is internally provided with a through hole, and the outer diameter of the limiting ring is smaller than that of the sealing main body. According to the difference of the flange plate thickness of first flange and second flange, can select the spacing ring of different thickness for use to carry out the position and inject, when guaranteeing that sealing bolt uses, the contact surface of first flange and second flange is in between first sealing washer and the second sealing washer in its seal assembly. The outside diameter of the limiting ring is smaller than the outside diameter of the sealing main body, so that the situation that the limiting ring cannot be installed in use due to overlarge size is avoided.

Furthermore, the positioning ring is internally provided with threads, and the outer diameter of the positioning ring is smaller than that of the sealing main body. The outer diameter of the positioning ring is smaller than that of the sealing main body, so that the situation that the positioning ring cannot be installed in use due to overlarge size is avoided. The positioning ring and the bolt are in threaded connection, the position of the sealing structure is limited, secondary locking is formed between the positioning ring and the sealing structure, looseness of the sealing structure in the using process is avoided, and therefore the sealing effect is influenced.

Above-mentioned technical scheme can find out, the utility model discloses following beneficial effect has: 1) the sealing assembly is arranged, so that a good sealing effect is achieved when the pipeline is connected with the flange, and the problem that liquid in the pipeline leaks out of a flange connecting gap to corrode the bolt, so that the service life and the fastening capacity of the bolt are influenced is avoided; 2) the limiting rings with different lengths are selected according to different sizes of fastened flanges, so that sealing structures with different lengths are formed, and the sealing structure is flexible to use and good in applicability; 3) the sealing main body and the positioning ring are internally provided with a thread structure which is in threaded connection with a bolt, and double locking is realized, so that the position offset phenomenon of the sealing assembly in use is avoided, and the sealing effect is ensured; 4) set up first nut and second nut, double-locking avoids receiving the circumstances such as vibration and leading to the bolt pine to take off, has improved locking ability greatly.

Drawings

Fig. 1 is a cross-sectional view of the present invention in a fastened state;

FIG. 2 is a perspective view of the seal assembly;

fig. 3 is a cross-sectional view of the seal body.

In the figure: the sealing structure comprises a bolt 1, a sealing structure 2, a sealing assembly 21, a sealing main body 211, a first groove 2111, a second groove 2112, a first sealing ring 212, a second sealing ring 213, a limiting ring 22, a positioning ring 23, a first nut 3, a second nut 4, a first flange 5 and a second flange 6.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example one

Fig. 1 is a cross-sectional view of the fastening state of the present invention, which includes a bolt 1, a sealing structure 2, a first nut 3 and a second nut 4, wherein the sealing structure 2, the first nut 3 and the second nut 4 are sequentially disposed on the bolt 1; as shown in fig. 2, the sealing structure 2 is a perspective view, and includes a sealing assembly 21, a limiting ring 22 and a positioning ring 23, where the limiting ring 22 and the positioning ring 23 are respectively disposed at two ends of the sealing assembly 21.

The total length of the sealing structure 2 is not more than the sum of the thicknesses of the flanges of the first flange 5 and the second flange 6 to be connected.

The seal assembly 21 includes a seal body 211, a first seal ring 212, and a second seal ring 213, and the first seal ring 212 and the second seal ring 213 are sequentially disposed on the seal body 211.

As shown in fig. 3, the sealing body 211 is shown in a cross-sectional view, with a first slot 2111 and a second slot 2112, the first slot 2111 and the second slot 2112 being disposed outside the sealing body 211.

The sealing body 221 is internally threaded.

The limiting ring 22 is provided with a through hole inside, and the outer diameter of the limiting ring is smaller than the outer diameter of the sealing main body 211.

The positioning ring 23 is internally threaded and has an outer diameter smaller than the outer diameter of the sealing body 211.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principles of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a sealing bolt is used in connection of pipeline flange which characterized in that: the bolt comprises a bolt (1), a sealing structure (2), a first nut (3) and a second nut (4), wherein the sealing structure (2), the first nut (3) and the second nut (4) are sequentially arranged on the bolt (1); the sealing structure (2) comprises a sealing component (21), a limiting ring (22) and a positioning ring (23), wherein the limiting ring (22) and the positioning ring (23) are respectively arranged at two ends of the sealing component (21).

2. The seal bolt for pipe flange connection according to claim 1, wherein: the total length of the sealing structure (2) is not more than the sum of the thicknesses of the flange plates of the first flange (5) and the second flange (6) to be connected.

3. The seal bolt for pipe flange connection according to claim 2, wherein: the sealing assembly (21) comprises a sealing main body (211), a first sealing ring (212) and a second sealing ring (213), wherein the first sealing ring (212) and the second sealing ring (213) are sequentially arranged on the sealing main body (211).

4. The seal bolt for pipe flange connection according to claim 3, wherein: the sealing main body (211) is provided with a first groove (2111) and a second groove (2112), and the first groove (2111) and the second groove (2112) are arranged on the outer side of the sealing main body (211).

5. The seal bolt for pipe flange connection according to claim 4, wherein: the interior of the sealing main body (211) is provided with threads.

6. The seal bolt for pipe flange connection according to claim 1, wherein: the limiting ring (22) is internally provided with a through hole, and the outer diameter of the limiting ring is smaller than that of the sealing main body (211).

7. The seal bolt for pipe flange connection according to claim 1, wherein: the positioning ring (23) is internally provided with threads, and the outer diameter of the positioning ring is smaller than that of the sealing main body (211).