Two-stage sealing type plugging device for large-diameter seawater pipeline

Abstract

The utility model discloses a large-caliber seawater pipeline two-stage sealing type plugging device which comprises a first sealing assembly and a second sealing assembly, the first sealing assembly is arranged in a pipeline, the second sealing assembly is arranged outside the pipeline, and the first sealing assembly is fixedly connected with the second sealing assembly through a connecting component; the first sealing assembly comprises a rubber ring and an arc-shaped sealing piece, one end of the rubber ring and the inner wall of the pipeline are arranged in an interference mode to form abutting sealing, the arc-shaped sealing piece is located on the inner side of the rubber ring, the two radial ends of the arc-shaped sealing piece are concave arc steel plates, and the concave arc steel plates and the rubber ring are arranged in an interference mode to form abutting sealing; the second sealing assembly comprises a cover plate and a sealing groove, the sealing groove is located in the edge of the cover plate, and the pipeline is connected with the cover plate by being clamped into the sealing groove. Two-stage sealing is achieved through the first sealing assembly and the second sealing assembly, the sealing performance of a large-diameter seawater pipeline is improved, and the problem that sealing of a traditional cover plate is not tight is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of large -diameter seawater pipeline sealing especially relates to a two -stage sealing type plugging device for large -diameter seawater pipeline. BACKGROUND

[0002] The heat source of the open rack type vaporizer (ORV) of the LNG receiving station at home and abroad is generally seawater, and the seawater diversion engineering mostly adopts the pipe jacking construction mode to cross the bottom of the wave retaining wall and penetrate into the sea, and the pipe jacking head needs to be plugged after the pipe jacking construction is completed, so as to install and construct the anode block inside the pipe jacking. The large -diameter seawater pipe jacking head is located at the bottom of the seabed on the sea, and the conventional plugging adopts the cover plate plus sealing ring mode to plug, but this kind of plugging construction is difficult to completely seal tightly, and once water seeps into the pipeline, it will cause serious safety accidents to the construction personnel inside the pipeline.

[0003] The existing technology solves the large -diameter seawater pipeline plugging mode by adopting the cover plate plus sealing ring mode to plug, but the large -diameter seawater pipeline end exists the pipeline deformation and the pipeline end uneven in the construction process, the existing technology is not sealed tightly, and there is the possibility of leakage. In addition, the plugging construction on the sea is difficult, high-risk, and high operation cost, and once the plugging leaks, it will lead to major safety accidents. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the deficiencies of the prior art, and provides a two -stage sealing type plugging device for large -diameter seawater pipeline, which strengthens the sealing of the large -diameter seawater pipeline.

[0005] The utility model aims at overcoming the deficiencies of the prior art, and provides a two -stage sealing type plugging device for large -diameter seawater pipeline, which strengthens the sealing of the large -diameter seawater pipeline.

[0006] A two -stage sealing type plugging device for large -diameter seawater pipeline, comprising a first sealing assembly and a second sealing assembly, the first sealing assembly is arranged in the pipeline, the second sealing assembly is arranged outside the pipeline, and the first sealing assembly is fixedly connected with the second sealing assembly through a connecting member.

[0007] The first sealing assembly comprises a rubber ring and an arc-shaped sealing piece, one end of the rubber ring is arranged in interference with the inner wall of the pipeline to form a contact seal, and the arc-shaped sealing piece is located on the inner side of the rubber ring, the radial ends of the arc-shaped sealing piece are concave arc steel plates, and the concave arc steel plates are arranged in interference with the rubber ring to form a contact seal.

[0008] The second sealing assembly comprises a cover plate and a sealing groove, the sealing groove is located at the edge of the cover plate, and the pipeline is connected with the cover plate by clamping into the sealing groove.

[0009] Preferably, the concave arc steel plate is adapted to the rubber ring.

[0010] Preferably, the arc-shaped sealing member further comprises a support steel plate, which is located between the concave arc steel plates and fixedly connected with the concave arc steel plates, and the support steel plate is connected with the cover plate through the connecting member.

[0011] Preferably, the rubber ring is provided with a water filling and pressurizing pipe on the side close to the cover plate, and the water filling and pressurizing pipe extends through the cover plate to the end of the water outlet.

[0012] Preferably, the sealing groove is provided with a rubber gasket.

[0013] Preferably, the connecting member is a steel pipe.

[0014] The utility model has the following advantages and beneficial effects relative to the prior art:

[0015] (1), the utility model discloses a two-stage sealing type plugging device for large -diameter seawater pipeline, realizes two -stage sealing through first sealing assembly and second sealing assembly, increases the sealing property to large -diameter seawater pipeline, effectively solves the problem of not being tight of traditional cover plate and sealing ring mode sealing, thoroughly avoids the leakage risk.

[0016] (2), the cooperation of first sealing assembly and second sealing assembly can adapt to the deformation and unevenness of the end of large -diameter pipeline, ensure that good sealing effect can be realized under different construction conditions, significantly reduce the risk of safety accidents caused by leakage, guarantee the life safety of construction personnel and the normal operation of equipment. The device has simple structure, excellent sealing property, completely solves the water leakage problem, reduces the difficulty of offshore plugging construction, and reduces construction cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the structure diagram of the two-stage sealing type plugging device of the utility model;

[0018] Figure 2 is the structure diagram of the two-stage sealing type plugging device of the utility model;

[0019] Figure 3 is the structure diagram of the arc-shaped sealing member of the utility model;

[0020] Markings of components in the drawings:

[0021] 1-first sealing assembly, 11-rubber ring, 12-arc-shaped sealing member, 121-concave arc steel plate, 122-support steel plate, 13-water filling and pressurizing pipe, 2-second sealing assembly, 21-cover plate, 22-sealing groove, 23-rubber gasket, 3-connecting member. DETAILED DESCRIPTION

[0022] The application purposes of the present application are described in further detail below in combination with the drawings and specific embodiments, and the embodiments cannot be described one by one here, but the implementation manners of the present application are not limited to the following embodiments.

[0023] Embodiment one

[0024] A two-stage sealing type plugging device for a large-diameter seawater pipeline comprises a first sealing assembly 1, a second sealing assembly 2 and two connecting members 3, the first sealing assembly 1 comprises a rubber ring 11, an arc-shaped sealing member 12 and a water-filling pressurizing pipe 13, the arc-shaped sealing member 12 comprises two concave-arc steel plates 121 and two support steel plates 122; the second sealing assembly 2 comprises a cover plate 21, a sealing groove 22 and a rubber gasket 23.

[0025] The rubber ring 11 is arranged on the radial inner wall of the large-diameter seawater pipeline, and the outer surface of the rubber ring 11 is arranged in interference with the inner wall of the pipeline to form a butt seal; the arc-shaped sealing member 12 is located at the opening in the circle of the rubber ring 11, and the two ends in the radial direction of the arc-shaped sealing member 12 are the concave-arc steel plates 121, which are arranged in interference with the inner side of the rubber ring 11 to form a butt seal; the concave-arc steel plates 121 are adapted to the rubber ring 11 in curvature and can be tightly fitted. The two support steel plates 122 are located between the concave-arc steel plates 121 and are fixedly connected with the concave-arc steel plates 121 to form the arc-shaped sealing member 12. The support steel plates 122 are fixedly connected with the two connecting members 3 close to the water outlet side of the pipeline, the connecting members 3 are steel pipes, and the support steel plates 122 are connected with the cover plate 21 through the steel pipes.

[0026] The rubber ring 11 is further provided with the water-filling pressurizing pipe 13 close to the pipe opening, the water-filling pressurizing pipe 13 extends through the cover plate 21 to the end of the large-diameter seawater pipeline and is exposed outside the pipeline. The rubber ring 11 is flushed and pressurized through the water-filling pressurizing pipe 13, so that the rubber ring 11 is tightly sealed with the inner wall of the pipeline and the arc-shaped sealing member 12.

[0027] The cover plate 21 is located outside the pipe opening and is exposed in seawater, the outer edge of the cover plate 21 is provided with the sealing groove 22, the size of the sealing groove 22 is matched with the pipe opening, the sealing groove 22 can seal the pipe opening, the large-diameter seawater pipeline is connected with the cover plate 21 by being clamped into the sealing groove 22, and the sealing groove 22 is provided with the rubber gasket 23 to strengthen the sealing performance.

[0028] The rubber ring 11 is tightly sealed with the inner wall of the pipeline and the arc-shaped sealing member 12 after being pressurized by water to form a first-stage seal. The greater the water pressure on the inner and outer sides of the large-diameter pipeline at sea, the tighter the sealing performance of the second sealing assembly 2 on the pipeline, and a second-stage seal is formed.

[0029] The above specific embodiments are preferred embodiments of the utility model, and cannot limit the utility model, and any change or other equivalent replacement mode of other any technical scheme not departing from the utility model is contained in the protection scope of the utility model.

Claims

1. A two-stage sealing plugging device for large-diameter seawater pipelines, characterized in that, It includes a first sealing component (1) and a second sealing component (2), the first sealing component (1) is disposed inside the pipe, and the second sealing component (2) is disposed outside the pipe, and the first sealing component (1) is fixedly connected to the second sealing component (2) through a connecting member (3); The first sealing assembly (1) includes a rubber ring (11) and an arc-shaped sealing element (12). One end of the rubber ring (11) is press-fitted with the inner wall of the pipe to form a contact seal. The arc-shaped sealing element (12) is located inside the rubber ring (11). The radial ends of the arc-shaped sealing element (12) are concave arc steel plates (121). The concave arc steel plates (121) are press-fitted with the rubber ring (11) to form a contact seal. The second sealing assembly (2) includes a cover plate (21) and a sealing groove (22), the sealing groove (22) being located at the edge of the cover plate (21), and the pipe being connected to the cover plate (21) by snapping into the sealing groove (22).

2. The two-stage sealing plugging device for large-diameter seawater pipelines according to claim 1, characterized in that, The curvature of the concave arc steel plate (121) is adapted to the rubber ring (11).

3. The two-stage sealing plugging device for large-diameter seawater pipelines according to claim 1, characterized in that, The arc-shaped seal (12) also includes a support steel plate (122), which is located between the concave arc steel plates (121) and is fixedly connected to the concave arc steel plates (121). The support steel plate (122) is connected to the cover plate (21) through the connecting member (3).

4. The two-stage sealing plugging device for large-diameter seawater pipelines according to claim 1, characterized in that, The rubber ring (11) is provided with a water filling and pressurizing pipe (13) on the side near the cover plate (21), and the water filling and pressurizing pipe (13) extends through the cover plate (21) to the end of the pipe outlet.

5. The two-stage sealing plugging device for large-diameter seawater pipelines according to claim 1, characterized in that, A rubber gasket (23) is provided inside the sealing groove (22).

6. The two-stage sealing plugging device for large-diameter seawater pipelines according to claim 1, characterized in that, The connecting component (3) is a steel pipe.

Images