Main sealing ring for liquid chlorine loading arm rotating joint

Abstract

The utility model provides a main sealing ring for a liquid chlorine loading arm rotating joint, which relates to the technical field of rotating joint sealing and comprises a static sealing ring and a movable sealing ring. An arc-shaped groove is formed in the end, close to the movable sealing ring, of the static sealing ring, an arc-shaped protruding block matched with the arc-shaped groove is arranged at the end, close to the static sealing ring, of the movable sealing ring, and the arc-shaped protruding block is embedded in the arc-shaped groove and rotationally connected with the static sealing ring. The main sealing ring is arranged to be in a form of combining the static sealing ring and the movable sealing ring, and the arc-shaped convex block arranged on the movable sealing ring is embedded in the arc-shaped groove formed in the static sealing ring, so that the problems that in the prior art, in the using process of the main sealing ring, waste chlorine contains water, so that a stainless steel spring clamp is corroded, and the service life of the stainless steel spring clamp is prolonged are solved. And the sealing failure is further caused.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary joint sealing, in particular to a main sealing ring for a rotary joint of a crane pipe for loading liquid chlorine. Background Art

[0002] The main sealing ring in the crane pipe rotary joint is mainly used to seal the crane pipe rotary joint when the rotary joint's own seal fails.

[0003] Since the crane pipe rotary joint is used for loading liquid chlorine, higher requirements are placed on the sealing performance of the main sealing ring in the crane pipe rotary joint. In the prior art, the main sealing ring in the rotary joint is embedded in the detachable connection end of the rotary joint. The main sealing ring is made of PTFE-reinforced polytetrafluoroethylene material, supplemented with high-performance fillers such as carbon fiber, and embedded with a stainless steel spring clip. However, during the use of the main sealing ring, the waste chlorine gas contains moisture, which causes the stainless steel spring clip to corrode, thereby causing the sealing failure problem. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a main sealing ring for a liquid chlorine loading crane pipe rotary joint, which solves the problem in the prior art that waste chlorine gas contains moisture, causing corrosion of the stainless steel spring card and further causing sealing failure.

[0006] (II) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] In the utility model, the main sealing ring used for the rotating joint of the crane pipe for loading liquid chlorine includes a static sealing ring and a dynamic sealing ring;

[0009] An arcuate groove is formed at one end of the static seal ring close to the dynamic seal ring, and an arcuate convex block matched with the arcuate groove is formed at one end of the dynamic seal ring close to the static seal ring. The arcuate convex block is embedded in the arcuate groove and is rotatably connected to the static seal ring.

[0010] Furthermore, a first inner ring is provided at one end of the static sealing ring close to the dynamic sealing ring, the inner diameter of the first inner ring is the same as the inner diameter of the static sealing ring, the first inner ring is embedded in the inner ring of the dynamic sealing ring and contacts the inner side wall of the dynamic sealing ring.

[0011] Furthermore, a second inner ring is provided at one end of the dynamic seal ring away from the static seal ring, and the inner diameter of the second inner ring is the same as the inner diameter of the dynamic seal ring. During installation, the first inner ring extends to the inside of the second inner ring and contacts the inner wall of the second inner ring.

[0012] Furthermore, the first inner ring is integrally formed with the static sealing ring, and the second inner ring is integrally formed with the dynamic sealing ring.

[0013] Furthermore, the static sealing ring and the dynamic sealing ring are both made of polytetrafluoroethylene.

[0014] (III) Beneficial effects

[0015] The utility model provides a main sealing ring for a rotating joint of a crane pipe for loading liquid chlorine. Compared with the prior art, it has the following beneficial effects:

[0016] The main sealing ring is arranged in the form of a combination of a static sealing ring and a dynamic sealing ring, and the arc-shaped protrusion arranged on the dynamic sealing ring is embedded in the arc-shaped groove opened in the static sealing ring, so that the dynamic sealing ring can rotate relative to the static sealing ring. The static sealing ring and the dynamic sealing ring form a sealing groove after installation, and the sealing performance can be guaranteed during rotation, and the ring can be reused. This solves the problem in the prior art that during the use of the main sealing ring, the stainless steel spring card is corroded due to the water contained in the waste chlorine gas, thereby causing the sealing failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a three-dimensional diagram of the main sealing ring in the rotating joint of the crane pipe for loading liquid chlorine;

[0019] Figure 2 for Figure 1 The three-dimensional image after flipping;

[0020] Figure 3 This is a schematic diagram of the structure of the main sealing ring;

[0021] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA.

[0022] Reference numerals:

[0023] 10. static sealing ring; 101. arc-shaped groove; 102. first inner ring; 20. dynamic sealing ring; 201. arc-shaped protrusion; 202. second inner ring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The embodiment of the present application provides a main sealing ring for a liquid chlorine loading crane pipe rotary joint, thereby solving the problem in the prior art that waste chlorine gas contains moisture, which causes corrosion of the stainless steel spring clip and further causes seal failure, thereby improving the sealing performance of the rotary joint.

[0026] The technical solution in the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0027] Through research, it was found that during the use of the liquid chlorine loading crane pipe rotary joint, the stainless steel spring card was corroded due to the water content in the waste chlorine gas, which easily caused the seal failure. After many communications with the machining manufacturer, the reinforced polytetrafluoroethylene material was used for overall processing, and the RF flange face seal was used in conjunction with the concave surface of the rotary joint to split the main seal into two parts from the middle. The ring connection surface was used as a reference to machine an arc-shaped groove on the static seal ring in the lower half and an arc-shaped bump on the dynamic seal ring in the upper half to form a sealing groove after installation. The sealing can also be guaranteed during rotation and can be reused with good results.

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Example:

[0030] like Figure 1-Figure 4 As shown, a main sealing ring for a liquid chlorine loading crane pipe rotary joint comprises a static sealing ring 10 and a dynamic sealing ring 20;

[0031] An arcuate groove 101 is formed at one end of the static seal ring 10 close to the dynamic seal ring 20 , and an arcuate protrusion 201 matching the arcuate groove 101 is formed at one end of the dynamic seal ring 20 close to the static seal ring 10 . The arcuate protrusion 201 is embedded in the arcuate groove 101 and is rotatably connected to the static seal ring 10 .

[0032] The main sealing ring is provided in the form of a combination of a static sealing ring 10 and a dynamic sealing ring 20, and the arc-shaped protrusion 201 provided on the dynamic sealing ring 20 is embedded in the arc-shaped groove 101 opened in the static sealing ring 10, so that the dynamic sealing ring 20 can rotate relative to the static sealing ring 10. After installation, the static sealing ring 10 and the dynamic sealing ring 20 form a sealing groove, which can ensure sealing performance during rotation and can be reused, thereby solving the problem in the prior art that during the use of the main sealing ring, the stainless steel spring card is corroded due to the water contained in the waste chlorine gas, thereby causing sealing failure.

[0033] The static seal ring 10 is provided with a first inner ring 102 at one end close to the dynamic seal ring 20 . The inner diameter of the first inner ring 102 is the same as that of the static seal ring 10 . The first inner ring 102 is embedded in the inner ring of the dynamic seal ring 20 and contacts the inner wall of the dynamic seal ring 20 .

[0034] By setting the first inner ring 102, when the dynamic sealing ring 20 rotates with the static sealing ring 10 through the arc-shaped protrusion 201 and the arc-shaped groove 101, the first inner ring 102 embedded in the dynamic sealing ring 20 can improve the stability between the dynamic sealing ring 20 and the static sealing ring 10, thereby improving the sealing performance when the dynamic sealing ring 20 and the static sealing ring 10 rotate.

[0035] The dynamic seal ring 20 is provided with a second inner ring 202 at one end away from the static seal ring 10 . The inner diameter of the second inner ring 202 is the same as the inner diameter of the dynamic seal ring 20 . During installation, the first inner ring 102 extends into the interior of the second inner ring 202 and contacts the inner wall of the second inner ring 202 .

[0036] By providing the second inner ring 202 , the embedding depth of the first inner ring 102 and the dynamic seal ring 20 is deepened, thereby further improving the sealing degree between the static seal ring 10 and the dynamic seal ring 20 while achieving the installation of the dynamic seal ring 20 .

[0037] The first inner ring 102 is integrally formed with the static seal ring 10 , and the second inner ring 202 is integrally formed with the dynamic seal ring 20 , which facilitates the production of the static seal ring 10 and the dynamic seal ring 20 .

[0038] The static seal ring 10 and the dynamic seal ring 20 are both made of polytetrafluoroethylene. The use of polytetrafluoroethylene can make the main seal ring have a small friction coefficient, good anti-aging performance, no elastic deformation when in contact with chemicals, and can be reused and have a long service life.

[0039] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The main sealing ring is provided in the form of a combination of a static sealing ring 10 and a dynamic sealing ring 20, and the arc-shaped protrusion 201 provided on the dynamic sealing ring 20 is embedded in the arc-shaped groove 101 provided in the static sealing ring 10, so that the dynamic sealing ring 20 can rotate relative to the static sealing ring 10. The static sealing ring 10 and the dynamic sealing ring 20 form a sealing groove after installation, and the sealing performance can be ensured during rotation, and the sealing performance can be repeated. This solves the problem in the prior art that during the use of the main sealing ring, the corrosion of the stainless steel spring card due to the water contained in the waste chlorine gas leads to the failure of the seal.

[0041] 2. By setting the first inner ring 102, when the dynamic sealing ring 20 rotates with the static sealing ring 10 through the arc-shaped protrusion 201 and the arc-shaped groove 101, the first inner ring 102 embedded in the dynamic sealing ring 20 can improve the stability between the dynamic sealing ring 20 and the static sealing ring 10, thereby improving the sealing performance of the dynamic sealing ring 20 and the static sealing ring 10 when rotating.

[0042] 3. By providing the second inner ring 202 , the embedding depth of the first inner ring 102 and the dynamic seal ring 20 is deepened, thereby further improving the sealing degree between the static seal ring 10 and the dynamic seal ring 20 while realizing the installation of the dynamic seal ring 20 .

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A main sealing ring for a liquid chlorine loading crane pipe rotary joint, characterized in that: It comprises a static sealing ring (10) and a dynamic sealing ring (20); An arc-shaped groove (101) is provided at one end of the static sealing ring (10) close to the dynamic sealing ring (20), and an arc-shaped protrusion (201) adapted to the arc-shaped groove (101) is provided at one end of the dynamic sealing ring (20) close to the static sealing ring (10); the arc-shaped protrusion (201) is embedded in the arc-shaped groove (101) and is rotatably connected to the static sealing ring (10).

2. A main sealing ring for a liquid chlorine loading crane pipe rotary joint as claimed in claim 1, characterized in that: A first inner ring (102) is provided at one end of the static sealing ring (10) close to the dynamic sealing ring (20); the inner diameter of the first inner ring (102) is the same as the inner diameter of the static sealing ring (10); the first inner ring (102) is embedded in the inner ring of the dynamic sealing ring (20) and contacts the inner wall of the dynamic sealing ring (20).

3. A main sealing ring for a liquid chlorine loading crane pipe rotary joint as claimed in claim 2, characterized in that: A second inner ring (202) is provided at one end of the dynamic seal ring (20) away from the static seal ring (10); the inner diameter of the second inner ring (202) is the same as the inner diameter of the dynamic seal ring (20); when installed, the first inner ring (102) extends into the interior of the second inner ring (202) and contacts the inner wall of the second inner ring (202).

4. A main sealing ring for a liquid chlorine loading crane pipe rotary joint as claimed in claim 3, characterized in that: The first inner ring (102) and the static sealing ring (10) are integrally formed, and the second inner ring (202) and the dynamic sealing ring (20) are integrally formed.

5. A main sealing ring for a liquid chlorine loading crane pipe rotary joint as claimed in claim 1, characterized in that: The static sealing ring (10) and the dynamic sealing ring (20) are both made of polytetrafluoroethylene.

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