A test pipe joint for flared pipe lines

Abstract

The utility model discloses a test pipe joint for flared pipeline, design prolongs the sealing taper surface, avoids the stress concentration of joint in the test process, and the sealing taper surface angle is 74 DEG, and the minimum outer diameter d of sealing taper surface is less than the inner diameter D of guide pipe, thereby avoiding the stress concentration of the minimum size of sealing taper surface in the test process due to the torque effect, thereby causing the damage of guide pipe taper surface, can effectively avoid the damage of tool joint to guide pipe sealing surface, realizes the quality improvement and efficiency increase, avoids increasing the polishing procedure, and even the scrapping of guide pipe due to the test.

Description

Technical Field

[0001] This utility model relates to the technical field of aviation pipeline conduit connection control, and in particular to a test pipe connector for flared pipelines. Background Technology

[0002] Currently, the manufacturing of flared pipes in China is all designed and manufactured according to the HB4-1-2002 standard. The dimensions of the flared pipe fittings must be designed according to HB4-3-2002. After the flared ends of the conduit assemblies are completed, a 100% sealing or pressure test is required to check whether the flaring of the conduit ends meets the requirements. Therefore, if the test fixtures are designed according to the standard dimensions of HB4-3-2002, under the specified torque, the test fixtures are prone to damaging the 74° sealing surface of the flared conduit assembly, especially for aluminum alloy flared conduits. This increases the polishing requirements and, in severe cases, can even lead to the scrapping of the conduit assembly. Therefore, by improving the design of the test fixtures, damage to the conduit sealing surface can be effectively avoided during testing, achieving improved quality and efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a test pipe connector for flared pipes, which avoids the need for additional polishing processes or even the scrapping of the conduit due to testing by designing the connector port size.

[0004] A test pipe fitting for flared pipes is designed with an extended sealing cone to avoid stress concentration caused by the joint during the test. The sealing cone angle is 74°, and the minimum outer diameter d of the sealing cone is smaller than the inner diameter D of the conduit. This avoids stress concentration caused by torque during the test due to the minimum size of the sealing cone, thus preventing damage to the conduit cone.

[0005] Furthermore, the connector is designed with a test medium flow channel, the diameter d1 of which is smaller than the minimum dimension d of the sealing cone surface, and the difference between the two diameters is greater than or equal to 1 mm.

[0006] The beneficial effects of this utility model are:

[0007] The test pipe fitting for flared pipes provided by this utility model can effectively avoid damage to the sealing surface of the conduit by the tooling fitting, thereby improving quality and efficiency, and avoiding the need for additional polishing processes or even the scrapping of the conduit due to testing. Attached Figure Description

[0008] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0009] Figure 1 This is a schematic diagram of the connection between the test pipe fitting and the conduit for the flared pipeline provided by this utility model; in the figure: 1-test pipe fitting for flared pipeline, 101-fitting end, 102-body, 101.1-sealing conical surface, 2-conduit, 3-flat nozzle, d-minimum outer diameter of fitting end, d1-inner diameter of fitting end, D-inner diameter of conduit. Detailed Implementation

[0010] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0011] Please see Figure 1 The figure shows a schematic diagram of the connection between the flared pipe test fitting and the conduit provided by this utility model. The flared pipe test fitting 1 includes a fitting end 101 and a hollow pipe body structure 102. The fitting end 101 is provided with a sealing cone surface 101.1 that gradually decreases in diameter towards the end face. The taper of the sealing cone surface 101.1 is 74°. The minimum outer diameter d of the fitting end 101 is smaller than the inner diameter D of the conduit, thereby extending the sealing cone surface. This avoids stress concentration caused by torque during the test when the minimum size of the sealing cone surface is at the test position, thus preventing damage to the conduit cone surface. The inner diameter d1 of the fitting end 101 is smaller than the minimum outer diameter d. The difference between the minimum outer diameter d and the inner diameter d1 is greater than or equal to 1 mm.

[0012] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, are all covered within the scope of the claims of this utility model.

Claims

1. A test pipe fitting for flared pipes, characterized in that: The hollow tube structure includes a connector end (101) and a body (102). The connector end (101) is provided with a sealing cone surface (101.1) whose diameter gradually decreases towards the end face. The taper of the sealing cone surface (101.1) is 74°. The minimum outer diameter (d) of the connector end (101) is smaller than the inner diameter (D) of the conduit, and the inner diameter (d1) of the connector end (101) is smaller than the minimum outer diameter (d).

2. The test pipe fitting for flared pipes according to claim 1, characterized in that: The difference between the minimum outer diameter (d) and the inner diameter (d1) is greater than or equal to 1 mm.

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