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KR-20260062339-A - Nitrogen Gas Sealed Swivel Joint

KR20260062339AKR 20260062339 AKR20260062339 AKR 20260062339AKR-20260062339-A

Abstract

The present invention relates to a nitrogen gas sealing type swivel joint that rotatably connects two pipes and prevents leakage of fluid passing between the two pipes. The present invention comprises a first pipe and a second pipe that supply fluid, which are rotatably connected, and comprises: a rod connected to the first pipe; a housing provided on the outer side of the rod; a cover provided at the front end of the housing and connected to the second pipe; a plurality of rotation-inducing balls interposed to form a circle between the outer surface of the rod and the inner surface of the housing, which roll to allow the housing and the rod to rotate individually; a first sealing member interposed between the front end of the rod and the rear end of the cover to prevent fluid leakage; a second sealing member interposed between the front end of the housing and the rear end of the cover to prevent fluid leakage; and a nitrogen-filled chamber partitioned to be isolated from the outside at the boundary between the rod, the housing, and the cover by the interposition of the first sealing member and the second sealing member. The technical gist of the nitrogen gas sealing type swivel joint is characterized by comprising: a nitrogen injection nozzle provided on one side of the cover, communicating with one side of the nitrogen filling chamber, and connected to an external nitrogen supply pipe to fill the nitrogen filling chamber with nitrogen gas so that the pressure of the nitrogen gas is applied to the first sealing member and the second sealing member.

Inventors

  • 지영민

Assignees

  • 케이티엘 (주)

Dates

Publication Date
20260507
Application Date
20241029

Claims (5)

  1. By rotatably connecting the first pipe and the second pipe that supply fluid, A rod connected to the first pipe above; A housing provided on the outer side of the above rod; A cover provided at the tip of the above housing and connected to the above second pipe; A plurality of rotation-inducing balls are interposed to form a circle between the outer surface of the rod and the inner surface of the housing, causing the housing and the rod to rotate individually through rolling motion; A first sealing member interposed between the leading end of the rod and the rear end of the cover to prevent fluid leakage; A second sealing member interposed between the front end of the housing and the rear end of the cover to prevent fluid leakage; A nitrogen-filled chamber partitioned to be isolated from the outside by the interposition of the first sealing member and the second sealing member at the boundary between the rod, the housing, and the cover; and A nitrogen gas sealing type swivel joint characterized by comprising: a nitrogen injection nozzle provided on one side of the cover, communicating with one side of the nitrogen filling chamber, and connected to an external nitrogen supply pipe to fill the nitrogen filling chamber with nitrogen gas so that the pressure of the nitrogen gas is applied to the first sealing member and the second sealing member.
  2. In paragraph 1, A nitrogen gas sealing type swivel joint characterized by including a nitrogen circulation nozzle installed on the other side of the cover, communicating with the other side of the nitrogen filling chamber, and connected to an external nitrogen circulation pipe and connected to a nitrogen injection nozzle of another swivel joint.
  3. In paragraph 2, A nitrogen gas sealing type swivel joint characterized by including a third sealing member interposed between the rear end of the rod and the rear end of the housing to block the penetration of foreign substances.
  4. In paragraph 3, The above rotation induction ball is A nitrogen gas sealing type swivel joint characterized by being composed of at least three rows spaced apart from each other.
  5. In paragraph 4, The above first sealing member is It is installed in a state where it is inserted into a first sealing groove formed by being recessed so as to be connected to each other in the inner side of the front end surface of the rod and the inner side of the rear end surface of the cover facing each other. The above second sealing member is A nitrogen gas sealing type swivel joint characterized by being installed in a state where it is inserted into a second sealing groove formed by being recessed so as to be connected to each other, on the inner side of the front end surface of the housing and on the outer side of the rear end surface of the cover facing each other.

Description

Nitrogen Gas Sealed Swivel Joint The present invention relates to a nitrogen gas sealing type swivel joint that rotatably connects two pipes and prevents leakage of fluid passing between the two pipes. Generally, a swivel joint is a type of pipe joint that rotatably connects two pipes and performs the function of facilitating the smooth flow of fluid passing between them. These swivel joints are being applied as key piping components, such as loading arms used in ships, plants, and trucks, in energy sectors including oil, chemicals, and gas. Here, the swivel joint includes a rod connected to the end of a first pipe, a housing installed on the outside of the rod and connected to the end of a second pipe to be connected to the first pipe, and a plurality of rotation-inducing balls interposed between the rod and the housing to form a circle and roll so that the housing and the rod each rotate individually. In addition, the swivel joint further includes a main sealing member interposed between the inner surface of one end of the housing and one end of the cover to block the gap between the housing and the rod to prevent fluid leakage and block the penetration of contaminants, and a sub-sealing member interposed between the inner surface of the other end of the housing and the outer surface of the other end of the cover. Meanwhile, the swivel joint has a limitation in that, as it is used for a long time, wear occurs on the main sealing member and the sub-sealing member due to friction caused by the rotational movement of the housing, and the sealing performance guaranteed by the main sealing member and the sub-sealing member inevitably deteriorates. To overcome the problems caused by these limitations, the main sealing members and sub-sealing members must be replaced periodically. However, if the main sealing members and sub-sealing members are not replaced periodically due to negligence in maintenance, fluid leakage or contamination of the fluid with foreign substances can lead to safety accidents and emergencies of varying severity. Therefore, to resolve the aforementioned problems, research is required on additional sealing technology capable of supplementing the sealing performance of the main and sub-sealing members in the swivel joint, so as to prevent safety accidents and emergency situations caused by fluid leakage and foreign matter contamination resulting from the wear of the main and sub-sealing members. FIG. 1 is a perspective view illustrating a nitrogen gas sealing type swivel joint according to a preferred embodiment of the present invention. FIG. 2 is an exploded perspective view illustrating a nitrogen gas sealing type swivel joint according to a preferred embodiment of the present invention. Figure 3 is a cross-sectional view along the line "AA" in Figure 1. The present invention relates to a nitrogen gas sealing type swivel joint used as a core component in loading arms, etc., used in ships, plants, trucks, etc., in energy fields including petroleum, chemical, gas, etc., which rotatably connects two pipes and prevents leakage of fluid passing between the two pipes. In particular, a major feature of the nitrogen gas sealing type swivel joint according to the present invention is that it can prevent safety accidents and emergency situations caused by fluid leakage due to wear of the sealing member and the mixing of foreign matter. This feature can be achieved by a structure that fills the interior with nitrogen and pressurizes the sealing member with the filling pressure of the nitrogen, thereby maintaining the sealing performance of the sealing member despite wear of the sealing member. A nitrogen gas sealing type swivel joint according to a preferred embodiment of the present invention will be described in detail below with reference to the attached drawings. A nitrogen gas sealing type swivel joint (100) according to a preferred embodiment of the present invention rotatably connects a first pipe and a second pipe that supply fluid, and may be composed of a rod (10), a housing (20), a cover (30), a rotation induction ball (40), a first sealing member (50a), a second sealing member (50b), a nitrogen filling chamber (60), a nitrogen injection nozzle (70), a nitrogen circulation nozzle (80), and a third sealing member (50c), as shown in FIGS. 1 to 3. First, the above rod (10) may have a tube shape having a predetermined length and a circular first fluid passage (11) through which fluid passes may be formed in the center. And at the rear end of the rod (10), a first pipe joint (12) connected to the end of the first pipe may be formed. Next, the housing (20) may have a tubular shape having a predetermined length to surround the rod (10) from the outside, and a circular insertion hole (21) through which the rod (10) is inserted may be formed in the center. Next, the cover (30) may be connected to the front end of the housing (20) via a plurality of fixing bolts (33) to cover the front end of the rod