A pneumatic and elastic cleaning and air tightness test device for large-diameter marine pipes

Abstract

The invention discloses a marine large-caliber pipe system gas-elastic cleaning and air tightness test device, comprising: a short pipe, a tongue-and-groove flange, a quick-release locking mechanism, a hinge, an air intake quick joint and a pipe connection port; a pipe connection port is provided at the lower end of the short pipe, an air intake quick joint is provided on the outside, and a tongue-and-groove flange including a tongue-and-groove blind flange and a groove-face flange is provided at the upper end; the groove-face flange is fixed to the upper end of the short pipe, and a plurality of notches are evenly distributed on the edge of the tongue-and-groove flange; a plurality of quick-release locking mechanisms are arranged circumferentially, and the quick-release locking mechanism comprises a butterfly nut, a swing bolt, a latch and a support seat, the support seat is arranged on the outside of the short pipe, a latch is installed in a hole on the support seat, a swing bolt is provided on the latch sleeve, and the swing bolt is screwed to the butterfly nut and cooperates with the notch to fix the tongue-and-groove flange. The invention solves the problem that a traditional firing gun cannot drive a large-caliber sponge bullet to perform gas-elastic cleaning and gas-elastic filling on the pipeline, and the flange is repeatedly disassembled and assembled, which is time-consuming, labor-intensive and inefficient.

Description

Technical Field

[0001] The invention relates to the field of ship piping cleaning construction tooling design, and in particular to a ship large-caliber piping pneumatic-elastic cleaning and air tightness testing device. Background Art

[0002] After the system pipelines on a ship are installed on board, in order to ensure the cleanliness of the system, the entire system pipeline will be cleaned, usually using gas purging, liquid series washing, gas bomb passing and other cleaning methods. Some system pipelines have high requirements for cleanliness. The conventional water series washing scheme has a long cycle and poor effect. The water is not easy to remove after the series washing, which is basically not feasible; the direct series washing of the system medium is costly and uneconomical; the cleaning effect of gas purging is very limited for large-diameter and long-distance pipelines. Therefore, the best solution is to use gas bomb cleaning to clean the pipeline system.

[0003] For small-caliber, long-distance system pipelines, a special air bullet launching gun can be used to launch small-caliber sponge air bullets through the pipeline to remove impurities and other foreign matter in the pipeline. However, for large-caliber, long-distance system pipelines, such as system pipelines with DN ≥ 100mm, traditional launching guns cannot drive large-caliber sponge air bullets, and the purpose of air bullet cleaning of the pipeline cannot be achieved.

[0004] In the traditional shipbuilding field, the pipeline cleaning method of shooting bullets is generally to first insert the gas bullet into the pipeline, and then use a blind flange with its own inflation joint to connect multiple bolts to the pipeline end flange through tightening tools such as wrenches. Depending on the cleanliness of the inner wall of a pipeline, it usually takes more than ten or even dozens of bullets to clean it properly. This results in each time the gas bullet is loaded, it is necessary to go through the process of repeatedly disassembling and assembling the flange, which is time-consuming, labor-intensive and inefficient. Summary of the invention

[0005] The invention provides a large-caliber marine pipe system pneumatic bullet cleaning and air tightness test device to overcome the problem that a traditional firing gun cannot drive a large-caliber sponge gas bullet to perform pneumatic bullet cleaning on the pipeline, and the pneumatic bullet filling and repeated disassembly and assembly of flanges are time-consuming and laborious.

[0006] In order to achieve the above object, the technical solution of the present invention is:

[0007] A large-caliber marine piping system air-elastic cleaning and air tightness test device, comprising: a short tube, a tongue-and-groove flange, a quick-release locking mechanism, a hinge, an air intake quick connector and a pipeline connection port; the short tube is provided with a pipeline connection port at the lower end, an air intake quick connector is provided at the outer side of the short tube, and the short tube is provided with a tongue-and-groove flange at the upper end; the tongue-and-groove flange comprises a tongue-and-groove blind flange and a groove-and-groove flange, the groove-and-groove flange is fixed to the upper end of the short tube, the tongue-and-groove blind flange and the groove-and-groove flange are hinged by a hinge and can rotate around the hinge hinge shaft, the end face of the tongue-and-groove blind flange is provided with an annular boss, the end face of the groove-and-groove flange is provided with an annular groove, and the tongue-and-groove blind flange is provided with an annular boss. The annular boss is inserted into the annular groove of the groove surface flange, and a sealing ring is provided between the annular boss and the annular groove. A plurality of notches adapted for use with a quick-release locking mechanism are evenly distributed circumferentially on the edges of the tenon surface blind flange and the groove surface flange; a plurality of the quick-release locking mechanisms are arranged circumferentially, and the quick-release locking mechanism comprises a butterfly nut, a live bolt, a latch and a support seat, the support seat is arranged on the outside of the short tube, the latch is installed in a hole on the support seat, the latch is sleeved with a live bolt, the upper part of the live bolt is screwed with a butterfly nut, the live bolt rotates around the latch to drive the butterfly nut, and cooperates with the notches to fix the tenon surface blind flange and the groove surface flange.

[0008] Furthermore, when used for a pipeline with a flange, the pipeline connection port is a flange short pipe, and the flange short pipe includes a bent pipe and a flat flange. One end of the bent pipe is arranged at the lower end of the short pipe, and the other end is provided with a flat flange.

[0009] Furthermore, when used for pipelines without flanges, the pipeline connection port is a Straub joint.

[0010] Furthermore, the short pipe is a straight pipe.

[0011] Furthermore, the short pipe is a curved pipe.

[0012] Furthermore, a handle is fixed to the upper end surface of the tenon blind flange.

[0013] Furthermore, the annular boss and the annular groove are clearance-fitted.

[0014] The present invention has the beneficial effects:

[0015] 1. The invention has a simple structure and can be reused. The specification and size of the short tube are consistent with the specification and size of the pipeline to be cleaned. A pipeline connection port is provided at one end of the short tube. The pipeline connection port is selected according to the actual situation of the pipeline end to be connected. A quick air inlet joint is provided on the side of the short tube, which ensures that the gas supply hose can be quickly connected during air bomb cleaning. The gas supply hose is connected to the air source to provide power for the air bomb. The air bomb is inserted into the short tube from the mortise and tenon flange. The mortise blind flange and the groove flange cooperate with the sealing ring to ensure air tightness, which makes up for the limitation of traditional cleaning air guns on cleaning large-caliber and long pipelines, and can be applied to the cleaning of various ship pipeline systems; 2. The mortise and tenon flange has a reserved notch, and the butterfly nut does not need to be completely removed. The butterfly nut can be manually loosened to realize the rapid filling of the air bomb. The hinge is connected to the mortise and tenon flange, which ensures the rapid opening and closing of the mortise and tenon flange, and at the same time avoids the mortise and tenon flange from falling off during disassembly and assembly. It is easy to install and disassemble, and solves the problem of time-consuming and labor-intensive repeated disassembly and assembly of the flange for air bomb cleaning and filling of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a front view of an embodiment of a marine large-diameter pipe system air-elastic cleaning and air-tightness test device disclosed by the present invention, which is used for a pipe with a flange;

[0018] Figure 2 It is a top view of an embodiment of a marine large-caliber pipe system air-elastic cleaning and air-tightness test device disclosed by the present invention used for a pipe with a flange;

[0019] Figure 3 It is a front view of an embodiment of a marine large-diameter pipe system air-elastic cleaning and air-tightness test device disclosed by the present invention, which is used for a pipe without a flange;

[0020] Figure 4 It is a sectional view of the tongue and groove flange AA of a gas-elastic cleaning and air tightness test device for a large-diameter marine pipe system disclosed in the present invention;

[0021] Figure 5 It is a cross-sectional view of the tongue and groove flange BB of a marine large-diameter pipe system air-elastic cleaning and air tightness test device disclosed by the present invention;

[0022] Figure 6 for Figure 5 CC profile of ;

[0023] Figure 7 for Figure 6 DD profile diagram;

[0024] Figure 8 for Figure 2 A local enlarged view of I;

[0025] Fig. 9 It is a top view of an embodiment of a marine large-diameter pipe system air-elastic cleaning and air-tightness test device disclosed by the present invention, which is used for a pipe without a flange;

[0026] In the figure: 1, short pipe, 2, tenon blind flange, 2-1, annular boss, 3-A, elbow, 3-B, Straub joint, 4, groove flange, 4-1, annular groove, 5, butterfly nut, 6, live bolt, 7, latch, 8, support seat, 9, hinge, 10, air intake quick connector, 11, handle, 12, sealing ring, 13, flat flange. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] This embodiment provides a large-diameter marine piping pneumatic cleaning and air tightness test device. Figures 1 to 9As shown, it includes: a short tube 1, a tongue and groove flange, a quick-release locking mechanism, a hinge 9, an air intake quick connector 10 and a pipeline connection port; the short tube 1 is provided with a pipeline connection port at the lower end, the short tube 1 is provided with an air intake quick connector 10 on the outside, and the short tube 1 is provided with a tongue and groove flange at the upper end; the tongue and groove flange includes a tongue surface blind flange 2 and a groove surface flange 4, the groove surface flange 4 is welded to the upper end of the short tube 1, the tongue surface blind flange 2 and the groove surface flange 4 are hinged by a hinge 9, and can rotate around the hinge axis of the hinge 9, the end face of the tongue surface blind flange 2 is provided with an annular boss 2-1, the end face of the groove surface flange 4 is provided with an annular groove 4-1, the annular boss 2-1 of the tongue surface blind flange 2 is inserted into the groove surface The annular groove 4-1 of the flange 4, a sealing ring 12 is provided between the annular boss 2-1 and the annular groove 4-1, and the edges of the tenon blind flange 2 and the groove flange 4 are provided with three notches adapted for use with a quick-release locking mechanism; the three quick-release locking mechanisms are arranged circumferentially, and the quick-release locking mechanism includes a butterfly nut 5, a live bolt 6, a latch 7 and a support seat 8, the support seat 8 is welded to the outside of the short tube 1, the hole on the support seat 8 is used to install the latch 7, the latch 7 is sleeved with a live bolt, the upper part of the live bolt 6 is screwed with the butterfly nut 5, the live bolt 6 rotates around the latch 7 to drive the butterfly nut 5, and cooperates with the notches to fix the tenon blind flange 2 and the groove flange 4.

[0029] In a specific embodiment, the sealing ring 12 is a rubber asbestos sealing ring, which has good temperature resistance, pressure resistance, compression resilience and air tightness, and is suitable for sealing flange connections.

[0030] The specifications and dimensions of the short pipe are consistent with the specifications and dimensions of the pipes to be cleaned in the pipe system on board the ship. A pipe connection port is provided at one end of the short pipe, and the pipe connection port is selected according to the actual situation of the pipe end to be connected. A tongue and groove flange is provided at the other end of the short pipe, which is perpendicular to the axis of the short pipe. A rubber asbestos sealing ring is installed between the tongue and groove flanges, and air tightness is ensured by pressing the rubber asbestos sealing ring. An air intake quick connector is provided on the side of the short pipe, and the connector adopts a mature product to realize the quick connection between the present invention and the gas hose, and the gas source is connected through the gas hose to provide power for the gas bomb, which makes up for the limitation of traditional cleaning air guns on cleaning large-caliber and long pipes; Figure 4 , Figure 5 As shown, the mortise and tenon flange is provided with three adjacent notches with an included angle of 120 degrees; three supporting seats adapted to the notches are welded on the side of the short tube, and the movable bolts on the supporting seats are combined with butterfly nuts. The gas bullet is filled into the short tube from the mortise and tenon flange, and the butterfly nut does not need to be completely removed. The mortise and tenon flange at the end of the short tube can be quickly disassembled and locked by loosening the butterfly nut, thereby realizing rapid filling of the gas bullet; the hinge is welded on the side of the mortise and tenon flange, which can ensure the rapid opening and closing of the mortise and tenon flange while preventing the mortise and tenon flange from falling off during each disassembly and assembly process.

[0031] In a specific embodiment, when used for a pipeline with a flange, the pipeline connection port is a flange short pipe, and the flange short pipe includes a bend pipe 3-A and a flat flange 13. One end of the bend pipe is arranged at the lower end of the short pipe 1, and the other end is provided with a flat flange 13. The axis of the end of the bend pipe welded with the flat flange remains perpendicular to the flat flange.

[0032] In a specific embodiment, when used for a pipeline without a flange, the pipeline connection port is a Straub connector 3-B. The Straub connector is a mature product that is easy to install and is suitable for large-diameter pipelines.

[0033] In a specific embodiment, the short pipe 1 is a straight pipe.

[0034] In a specific embodiment, the short pipe 1 is a curved pipe.

[0035] In a specific embodiment, a plurality of the short tubes 1 can be welded together for use.

[0036] Some pipelines are arranged in the isolation cabin, the bottom of the floor frame or the top area of ​​the cabin. The space is narrow and it is extremely difficult for people to enter and exit and operate. The two ends of the pipeline are limited by the cabin space. The traditional method requires construction personnel to climb up or drill into a small space every time to carry out gas bomb filling and launching or air tightness testing. Due to space limitations, operation is difficult and inefficient. The angle and length are adjusted by straight pipes or curved pipes or a welding combination of the two. Flexible adjustments can be made according to actual needs to extend the operating position to open spaces, avoiding operations in small spaces, facilitating personnel to carry out gas bomb filling and launching and air tightness tests safely and quickly, and improving construction efficiency.

[0037] In a specific embodiment, a handle 11 is fixed to the upper end surface of the tenon blind flange 2 to facilitate personnel to open and close the tenon-groove flange.

[0038] In a specific embodiment, Figure 8 As shown, the annular boss 2-1 and the annular groove 4-1 are clearance-fitted, the gas spring is repeatedly filled, and the switching frequency of the mortise and tenon flange is high. If no gap is provided, the annular boss and the annular groove will collide and wear, and a gap is left to facilitate personnel operation.

[0039] The feasibility of the present invention has been verified in a real ship. In the actual operation of bullet cleaning, the maximum pipe outer diameter has reached 219mm, and the longest pipeline has reached 150 meters; the air tightness test pressure range can be 1.0-1.5MPa. The pipe diameter parameters of the present invention are set according to actual needs and are not limited to the pipe diameter and length in this experiment.

[0040] Finally, it should be noted that 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 they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A marine large-caliber piping pneumatic and airtightness testing device, characterized in that: include: A short pipe (1), a tongue-and-groove flange, a quick-release locking mechanism, a hinge (9), an air intake quick connector (10) and a pipeline connection port, wherein the short pipe (1) is a straight pipe or a curved pipe; The short tube (1) has a pipeline connection port at its lower end, an air intake quick connector (10) at its outer side, and a tongue-and-groove flange at its upper end; The mortise and groove flange comprises a mortise blind flange (2) and a groove flange (4), wherein the groove flange (4) is fixed to the upper end of the short tube (1), the mortise blind flange (2) and the groove flange (4) are hingedly connected via a hinge (9) and can rotate around the hinge axis of the hinge (9), the end surface of the mortise blind flange (2) is provided with an annular boss (2-1), the end surface of the groove flange (4) is provided with an annular groove (4-1), the annular boss (2-1) of the mortise blind flange (2) is inserted into the annular groove (4-1) of the groove flange (4), a sealing ring (12) is provided between the annular boss (2-1) and the annular groove (4-1), and a plurality of notches adapted to be used by a quick-release locking mechanism are evenly distributed on the edges of the mortise blind flange (2) and the groove flange (4); A plurality of quick-release locking mechanisms are arranged circumferentially, and the quick-release locking mechanisms include a butterfly nut (5), a live bolt (6), a latch pin (7) and a support seat (8). The support seat (8) is arranged outside the short tube (1). The latch pin (7) is installed in a hole on the support seat (8). The latch pin (7) is sleeved with a live bolt. The upper part of the live bolt (6) is screwed with the butterfly nut (5). The live bolt (6) rotates around the latch pin (7) to drive the butterfly nut (5) to cooperate with the notch to fix the tenon blind flange (2) and the groove flange (4). When used for a pipeline with a flange, the pipeline connection port is a flange short pipe, the flange short pipe comprises a bend pipe (3-A) and a flat flange (13), one end of the bend pipe is arranged at the lower end of the short pipe (1), and the other end is provided with a flat flange (13); When used for pipelines without flanges, the pipeline connection port is a Straub joint (3-B).

2. A marine large-diameter piping pneumatic and elastic cleaning and air tightness testing device according to claim 1, characterized in that: A handle (11) is fixed to the upper end surface of the tenon blind flange (2).

3. A marine large-diameter piping pneumatic and elastic cleaning and air tightness testing device according to claim 1, characterized in that: The annular boss (2-1) and the annular groove (4-1) are clearance-fitted.

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