CN203549262U - Pressure testing plug - Google Patents

Abstract

The utility model provides a pressure test plug, comprising: a joint, which has a central channel connected with the aircraft duct, one end of the joint is connected to the sealing test equipment of the aircraft duct, and the other end accommodates the pipe arranged on the outer periphery of the flexible joint. a sleeve; a compensating washer, which is disposed in an annular groove formed on the outer circumference of the sleeve; a top ring, which surrounds the outer circumference of the flexible joint and engages the sleeve of the flexible joint; and a tightening ring, which surrounds the aircraft conduit and holds The top ring; wherein, the outside of the joint is provided with external threads, and the inside of the tightening ring is provided with internal threads matching the external threads of the joint, so that the tightening ring is screwed to the joint , and the upward movement of the tightening ring is limited by the top ring. The utility model can fix the test piece on the plug without deflection through the cooperation of the compensation washer and the top ring, and avoid test leakage caused by excessive deflection of the conduit.

Description

a pressure test plug

technical field

The utility model relates to a sealing device, in particular to a pressure test plug, which is used for the sealing test of an aircraft conduit using a flexible joint.

Background technique

In the manufacture of various parts of large passenger aircraft, the manufacture of ducts occupies a very important position. In the main systems of large aircraft, such as fuel, hydraulic, environmental control, waste water and other systems, a variety of conduits with different material specifications and connection forms are involved, including flexible joints. This kind of joint is composed of pipe sleeve, sealing ring, sleeve and ferrule. After installation, two adjacent pipes can be deflected at a relatively small angle. Its pressure resistance is small, and it is mostly used in fuel and water systems. It is very necessary to test the tightness after the catheter is installed. Among them, the place where leakage is most likely to occur between the sleeve and the sealing ring. Therefore, it is very necessary to design a sealing test plug that is easy to use and adapts to the characteristics of the flexible joint.

Utility model content

The purpose of the utility model is to design a pressure test plug for sealing test of aircraft conduit using flexible joints, which meets the requirements of AS1656 sealing test.

In order to achieve the above purpose, the utility model provides a pressure test plug, including:

A joint having a central channel communicating with the aircraft duct, one end of the joint being connected to the aircraft duct sealing test apparatus, and the other end accommodating a sleeve provided on the outer periphery of the flexible joint;

a compensating washer disposed in an annular groove formed on the outer periphery of said sleeve;

a top ring surrounding the periphery of the flexible joint and engaging the sleeve of the flexible joint; and

a tightening ring that encircles the aircraft duct and accommodates the top ring;

Wherein, the outer side of the joint is provided with external threads, and the inner side of the tightening ring is provided with internal threads matching the external threads of the joint, so that the tightening ring is screwed to the joint, and the tightening The upward movement of the ring is limited by the top ring.

Wherein, the outer side of the top ring is provided with an annular flange, and the inner side of the tightening ring is provided with an annular groove, and the annular flange cooperates with the annular groove to limit the upward movement of the tightening ring.

Wherein, the top ring is composed of two semicircular half top ring parts.

Wherein, the pressure test plug is made of steel.

Wherein, the height of the compensation washer is greater than 3mm.

Wherein, the height of the top ring is greater than 3mm.

Beneficial effect:

The pressure test plug of the utility model is easy to install and can be carried out by using general tools. The test piece can be fixed on the plug through the cooperation of the compensation washer and the top ring without deflection, and the test leakage caused by excessive deflection of the catheter can be avoided.

Description of drawings

Fig. 1 is an exploded schematic view of a pressure test plug according to the utility model;

Figure 2 is a partial cross-sectional view of the joint of the pressure test plug of Figure 1; and

Fig. 3 is a cross-sectional view of the tightening ring of the pressure test plug in Fig. 1 .

Explanation of reference signs:

1 connector

11 center channel

2 compensating washers

3 sleeves

31 Ring groove

4 top ring

41 Ring flange

5 tightening ring

51 Ring groove

6 Aircraft conduit

Detailed ways

In the following detailed description of the preferred embodiment, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings show, by way of example, specific embodiments in which the invention can be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments according to the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention.

Fig. 1 shows an exploded schematic view of the pressure test plug of the present invention. The pressure test plug according to the utility model is used for the sealing test of the aircraft duct using a flexible joint, the flexible joint is connected to the end of the aircraft duct 6, and the outer periphery of the flexible joint is provided with a sleeve 3. The pressure test plug includes a joint 1 , a compensation washer 2 , a top ring 4 and a tightening ring 5 .

Referring to FIG. 2 and FIG. 3 , the joint 1 has a central channel 11 communicating with the aircraft duct 6 , one end of the joint 1 is connected to the aircraft duct sealing test equipment, and the other end accommodates the sleeve 3 . The compensating washer 2 is arranged in an annular groove 31 formed on the outer circumference of the sleeve 3 . The top ring 4 surrounds the periphery of the flexible joint and engages the sleeve 3 of the flexible joint. The tightening ring 5 surrounds the aircraft duct 6 and accommodates the top ring 4 . Wherein, the outer side of the joint 1 is provided with an external thread, and the inner side of the tightening ring 5 is provided with an internal thread matched with the external thread of the joint 1, so that the tightening ring 5 is screwed to the joint 1, and the upward movement of the tightening ring 5 is caused by the top Ring 4 restrictions.

Wherein, the outer side of the top ring 4 is provided with an annular flange 41 , and the inner side of the tightening ring 5 is provided with an annular groove 51 , and the annular flange 41 cooperates with the annular groove 51 to limit the upward movement of the tightening ring 5 . Preferably, the top ring 4 is composed of two semicircular half top ring parts. The pressure test plug is made of steel. Preferably, the height of the compensation washer 2 is greater than 3 mm, and the height of the top ring 4 is greater than 3 mm.

The pressure test plug of the utility model is composed of a joint, a compensation washer, a tightening ring, and a top ring. After it is assembled with the upper pipe sleeve and the sealing ring of the conduit, the upper end is connected to the hydraulic test bench, and the lower end is sealed with an AS21913 non-flared plug. , the sealing test and plugging of the pipeline can be completed.

Traditionally, a section of conduit with a flexible joint is used as a test joint, but the design of the joint cannot be disassembled multiple times, and the sleeve and ferrule are made of thin-walled aluminum alloys, which can be disassembled many times in large-scale sealing tests Afterwards, it is easy to cause damage, so that the test joint must be remanufactured. Moreover, flexible joints are all imported products with high prices, which will increase the cost. However, the plug of the utility model is made of steel, and all parts have no part with a thickness of less than 3 mm, and no damage will occur after repeated disassembly and assembly.

The pressure test plug of the utility model is easy to install and can be carried out by using general tools. The test piece can be fixed on the plug through the cooperation of the compensation washer and the top ring without deflection, and the test leakage caused by excessive deflection of the catheter can be avoided.

The specific embodiments described in the utility model are only preferred embodiments of the utility model, and are not used to limit the implementation scope of the utility model. That is to say, all equivalent changes and modifications made according to the content of the patent scope of the utility model all belong to the protection scope of the utility model.

Claims (6)

1. A pressure test plug for sealing tests of aircraft ducts using a flexible joint connected to the end of the aircraft duct (6), It is characterized in that the pressure test plug includes: A joint (1) having a central channel (11) communicating with said aircraft duct (6), one end of said joint being connected to the aircraft duct sealing test apparatus and the other end receiving a tube provided on the outer periphery of said flexible joint set(3); a compensating washer (2), which is arranged in an annular groove (31) formed on the outer periphery of said sleeve (3); a top ring (4) surrounding the periphery of the flexible joint and engaging the sleeve (3) of the flexible joint; and tightening ring (5), which surrounds the aircraft duct (6) and accommodates the top ring (4); Wherein, the outer side of the joint (1) is provided with an external thread, and the inner side of the tightening ring (5) is provided with an internal thread matched with the outer thread of the joint (1), so that the tightening ring (5) ) is screwed to the joint (1), and the upward movement of the tightening ring (5) is limited by the top ring (4). 2. The pressure test plug according to claim 1, characterized in that, the outer side of the top ring (4) is provided with an annular flange (41), and the inner side of the tightening ring (5) is provided with an annular groove (51), the annular flange (41) cooperates with the annular groove (51) to limit the upward movement of the tightening ring (5). 3. The pressure testing plug according to claim 1 or 2, characterized in that, the top ring (4) is composed of two semicircular half top ring parts. 4. The pressure test plug according to claim 1 or 2, characterized in that the pressure test plug is made of steel. 5. The pressure test plug according to claim 1 or 2, characterized in that the height of the compensation washer (2) is greater than 3mm. 6. The pressure test plug according to claim 1 or 2, characterized in that the height of the top ring (4) is greater than 3 mm.

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