A pipe airtight test plugging device

Abstract

The application relates to a pipeline airtight test plugging device for plugging a pipe orifice during pipeline airtightness test, which comprises a core rod, a plug, a soft pad, a gasket, a nut and a centering sleeve; the core rod is L-shaped; one end of the L-shaped shorter end of the core rod is in abutment with one end of the pipe orifice; the plug is provided with a first through hole; the core rod is sleeved in the first through hole; the plug is made of a certain elastic rubber material; compared with the prior art, the application has the beneficial effects that: the L-shaped core rod is arranged; the end of the L-shaped core rod is in abutment with the end face of the pipe orifice; when the nut is tightened, the nut presses the gasket, the gasket presses the plug on the other end of the pipe orifice, sealing is realized, and air leakage is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air tightness test device, in particular to a pipeline air tightness test plugging device. BACKGROUND

[0002] In the process of manufacturing components of aviation products, pipeline components are often subjected to air tightness test. However, there are various forms of pipe mouths, and in many cases, special air tightness plugs must be manufactured to meet the test requirements, which is laborious and time-consuming.

[0003] The closest prior art to the present application is: a split plate plug and a split plate with the plug (application number CN201820944100.3); the patent discloses a split plate plug and a split plate with the plug, which belongs to the technical field of hot runner accessories, and the plug comprises a plug sealing end face, which is located on the front side of the plug and is an inclined face, and the plug sealing end face is inclined upward from the center to the outer side. The plug and the flow channel hole are stably sealed in cooperation; the invention has the following disadvantages: a large external force is needed to achieve rigid sealing of the conical surface; in pipeline connection, too much external force can easily damage the pipeline.

[0004] There is also an application number CN201810009025.6 for a plug anti-loosening device and a plug anti-loosening method; the patent discloses a plug anti-loosening device and a plug anti-loosening method. The plug anti-loosening device comprises a retarder shell, a screw hole is arranged on the retarder shell, the plug is threadedly connected in the screw hole of the retarder shell for plugging, a sealing washer is arranged between the retarder shell and the plug, a through anti-loosening hole and a screw hole are respectively arranged in the retarder shell on the side of the screw hole and in the corresponding part of the plug, and a screw passes through the plug screw hole and the anti-loosening hole of the retarder shell to fix the plug on the retarder shell. The plug anti-loosening method comprises the following steps: 1. threadedly connecting the retarder shell, the sealing washer and the plug; 2. after the plug is tightened, the screw is screwed into the plug threaded hole and the retarder shell anti-loosening hole and tightened, so that the plug cannot rotate radially; the patent can only be used for pipelines with threads, and cannot be installed and used for pipelines without threads, which has limitations.

[0005] The above disadvantages need to be overcome, so there is an urgent need for a pipeline air tightness test plugging device that is convenient, fast, safe and reliable. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a pipeline air tightness test plugging device that can conveniently and quickly seal the pipeline.

[0007] To solve the above problems, the technical scheme adopted by the present application is as follows,

[0008] A pipeline airtight test plugging device for plugging a pipe opening during pipeline airtightness test, comprising a core rod sleeved in the pipe opening, a plug sleeved on the core rod, a gasket abutting against the plug, and a nut threadedly connected with the core rod; the nut abuts against the gasket.

[0009] Further, a centering sleeve is arranged between the core rod and the inner wall of the pipe opening.

[0010] Further, the core rod is L-shaped, and the shorter end of the L-shaped core rod abuts against one end of the pipe opening.

[0011] Further, the plug is provided with a first through hole, and the core rod is sleeved in the first through hole.

[0012] Further, the plug is provided with a protrusion, one end of the protrusion abuts against the pipe opening, and the other end of the protrusion abuts against the gasket.

[0013] Further, a soft pad is arranged between the protrusion of the plug and the gasket.

[0014] Further, the plug is made of a rubber material with certain elasticity.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. By arranging the soft pad, the gap between the soft pad and the core rod can be completely sealed under the pressure transmission of the nut by the elasticity of the soft pad, which has great benefits for preventing air leakage.

[0017] 2. By arranging the L-shaped core rod, the end of the L-shaped core rod abuts against the end face of the pipe opening, and when the nut is tightened, the nut presses the gasket, the gasket presses the plug against the other end of the pipe opening, thereby sealing and preventing air leakage.

[0018] 3. By arranging the centering sleeve, the core rod is positioned with the inner wall of the pipe opening, which has great benefits for preventing the plug from deviating. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the present application;

[0020] Figure 2 It is a structural schematic view of the plug;

[0021] Figure 3 It is a structural schematic view of the core rod;

[0022] Figure 4 It is a structural schematic view of the centering sleeve;

[0023] REFERENCE NUMERALS IN DRAWINGS:

[0024] 1 - core rod;

[0025] 2 - centering sleeve; 20 - first through hole;

[0026] 3 - plug; 30 - protrusion, 31 - second through hole

[0027] 4 - soft pad;

[0028] 5 - gasket;

[0029] 6 - nut;

[0030] 7 - pipe opening. DETAILED DESCRIPTION

[0031] It is first noted that the discussion of any embodiments of the application is intended to be purely exemplary, and is not intended to suggest the scope of the disclosure (including the claims) is limited to these examples; the different aspects of the application can be variously combined and / or removed from the embodiments described herein without departing from the scope of the application as recited in the claims. In addition, no aspect of the application is intended to be dedicated to the public regardless of whether recited in the claims.

[0032] Embodiment 1

[0033] As Figures 1-4 shown:

[0034] A pipe airtight test plugging device for plugging a pipe opening 7 during a pipe airtight test, comprising a core rod 1 threaded in the pipe opening 7, a plug 3 sleeved on the core rod 1, a gasket 5 abutting against the plug 3, and a nut 6 threaded with the core rod 1; the nut 6 abuts against the gasket 5.

[0035] Further comprising a centering sleeve 2 arranged between the core rod 1 and the inner wall of the pipe opening 7. The core rod 1 can be centered with the inner wall of the pipe opening 7 by the centering sleeve 2, avoiding the core rod 1 from running off.

[0036] The core rod 1 is L-shaped; the shorter end of the L-shaped core rod 1 abuts against one end of the pipe opening 7. The end of the core rod 1 can be abutted against the pipe opening 7 by the L shape, preventing the core rod 1 from being pulled out of the pipe opening 7. The length of the L shape is less than the inner diameter of the pipe opening 7, and is greater than 2 / 3 of the inner diameter of the pipe opening 7, so as to hook the core rod 1 with the pipe opening 7;

[0037] The plug 3 is provided with a first through hole 31; the core rod 1 is sleeved in the first through hole 31.

[0038] The plug 3 is provided with a protrusion 30; one end of the protrusion 30 abuts against the pipe opening 7; the other end of the protrusion abuts against the gasket 5.

[0039] Embodiment 2

[0040] This embodiment is basically the same as the structure of embodiment 1,

[0041] The difference is that a soft pad 4 is arranged between the protrusion 30 of the plug 3 and the gasket 5; the soft pad 4 is made of rubber with good elasticity. By arranging the soft pad 4, the gap between the soft pad 4 and the core rod 1 can be completely sealed under the pressure transmission of the nut 5 by the elasticity of the soft pad 4, which has great benefits in preventing air leakage.

[0042] The working principle and the use method of the embodiment are basically the same as those of Embodiment 1; and thus will not be described in detail.

[0043] Embodiment 3

[0044] The embodiment is basically the same as Embodiment 1 in structure, and the difference is that the plug 3 is made of rubber material with certain elasticity. The end of the pipe opening 7 is completely sealed by the elasticity of the plug 3 to avoid air leakage.

[0045] The working principle of the embodiment is basically the same as that of Embodiment 2; and thus will not be described in detail.

[0046] The preferred embodiments of the patent have been described in detail above, but the patent is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the patent.

Claims

1. A plugging device for pipeline air tightness test, used for plugging the pipe opening (7) during pipeline air tightness test, characterized in that: The utility model provides a core rod (1) is worn in the pipe orifice (7), the plug (3) is sleeved on the core rod (1), the gasket (5) is butt joint with the plug (3) and the nut (6) is screwed with the core rod (1);The nut (6) is butt joint with the gasket (5); It also includes a centering sleeve (2) between the core rod (1) and the inner wall of the pipe orifice (7); The core rod (1) is L-shaped, and the shorter end of the L-shaped core rod (1) is butt joint with one end of the pipe orifice (7); The plug (3) is provided with a first through hole (31), and the core rod (1) is sleeved in the first through hole (31); The plug (3) is provided with a protrusion (30), one end of the protrusion (30) is butt joint with the pipe orifice (7), and the other end of the protrusion (30) is butt joint with the gasket (5); A soft pad (4) is further provided between the protrusion (30) of the plug (3) and the gasket (5), and the soft pad (4) is made of rubber material; The plug (3) is made of elastic rubber material; The shorter end of the L-shaped core rod (1) is butt joint with one end of the pipe orifice (7) to prevent the core rod (1) from being pulled out of the pipe orifice (7), and the length of the L-shaped core rod (1) is smaller than the inner diameter of the pipe orifice (7) and greater than 2 / 3 of the inner diameter of the pipe orifice (7) to hook the core rod (1) and the pipe orifice (7).

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