Comprehensive test device for external pressure and internal pressure of pipe fitting

Abstract

The utility model discloses a comprehensive testing device for external pressure and internal pressure of a pipe fitting, which comprises a pressure-bearing container, a support plate and two tooling flanges, and the two ends of the pressure-bearing container are respectively and fixedly connected with a welding neck flange; the supporting plate is fixedly arranged in the inner cavity of the pressure-bearing container and is used for supporting a test workpiece; a cavity is formed among the pressure-bearing container, the butt welding flange and the test workpiece, and the cavity is used as an external pressure test cavity; the inner cavity of the test workpiece is used as an internal pressure test cavity; the two tool flanges are fixedly connected with the butt welding flange in a detachable mode. The tool flanges plug the two ends of the external pressure testing cavity and the two ends of the internal pressure testing cavity. According to the utility model, the external pressure strength, the internal pressure strength and the internal and external pressure combined strength of the steel pipe can be tested, and the deformation of the steel pipe can be clearly observed.

Description

Technical Field

[0001] The utility model relates to a testing device, in particular to a comprehensive testing device for external and internal pressure of pipe fittings. Background Art

[0002] With the development of science and technology, underwater engineering, underwater submersibles and underwater robots have been widely used. Accordingly, it is necessary to provide supporting system pipelines that can withstand external pressure. Since underwater steel pipes need to withstand external pressure proportional to the water depth during use, it is necessary to consider not only the influence of the medium pressure inside the steel pipe, but also the influence of the medium pressure outside the steel pipe to ensure the pressure resistance of the underwater system pipeline.

[0003] However, since ordinary steel pipe pipelines are usually used on water, they are only required to be able to withstand internal pressure. Therefore, existing testing equipment can only test the internal pressure strength of the steel pipe, and cannot test the external pressure strength of the steel pipe. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a comprehensive test device for external and internal pressure of pipe fittings, which can test the external pressure strength, internal pressure strength and the combined internal and external pressure strength of a steel pipe.

[0005] In order to solve the above technical problems, the technical solution of the utility model pipe fitting external pressure and internal pressure comprehensive test device is:

[0006] It includes a pressure container 7, a support plate 9 and two tooling flanges 3, and the two ends of the pressure container 7 are fixedly connected to the butt-welding flanges 5 respectively; the support plate 9 is fixedly arranged in the inner cavity of the pressure container 7, and is used to support the test workpiece 10; a cavity is formed between the pressure container 7 and the butt-welding flange 5 and the test workpiece 10, and the cavity serves as an external pressure test cavity; the inner cavity of the test workpiece 10 serves as an internal pressure test cavity; the two tooling flanges 3 are fixedly connected to the butt-welding flanges 5 in a detachable manner; the tooling flanges 3 block the two ends of the external pressure test cavity and the internal pressure test cavity; one of the tooling flanges 3 is provided with an inner hole connecting hole One end of the inner hole connecting hole is connected to the internal pressure test chamber, and the other end of the inner hole connecting hole is connected to the internal pressure test joint 1; the tooling flange 3 is also provided with an outer hole connecting hole and an external pressure connecting hole, one end of the outer hole connecting hole is connected to the external pressure test chamber, and the other end of the outer hole connecting hole is connected to the external pressure test joint 13; one end of the external pressure connecting hole is connected to the external pressure test chamber, and the other end of the external pressure connecting hole is connected to the external pressure gauge 12; another tooling flange 3 is provided with an internal pressure connecting hole, one end of the internal pressure connecting hole is connected to the internal pressure test chamber, and the other end of the internal pressure connecting hole is connected to the internal pressure gauge 11.

[0007] In another embodiment, the tooling flange 3 is detachably fixedly connected to the butt-welding flange 5 by means of a plurality of bolts 2 .

[0008] In another embodiment, the pressure container 7 is provided with a venting cock.

[0009] In another embodiment, the pressure container 7 is provided with a venting needle cock 8.

[0010] In another embodiment, the outer edge of the support plate 9 matches the inner hole of the pressure container 7 ; the inner hole of the support plate 9 matches the outer diameter of the test workpiece 10 .

[0011] In another embodiment, a gasket is provided between the butt welding flange 5 and the tooling flange 3 .

[0012] In another embodiment, an octagonal annular gasket 4 is provided between the butt-welding flange 5 and the tooling flange 3 .

[0013] In another embodiment, the end of the pressure container 7 is fixedly connected to the butt-welding flange 5 by welding.

[0014] In another embodiment, the internal pressure test connector is connected to an internal pressure test device.

[0015] In another embodiment, the external pressure test connector is connected to an external pressure test device.

[0016] The technical effects that can be achieved by the utility model are:

[0017] The utility model can test the external pressure strength, the internal pressure strength and the internal and external pressure combined strength of the steel pipe, and can clearly observe the deformation amount of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] It should be understood by those skilled in the art that the following description is only intended to schematically illustrate the principles of the present invention, which can be applied in a variety of ways to achieve many different alternative embodiments. These descriptions are only used to illustrate the general principles of the teachings of the present invention and are not intended to limit the utility model concepts disclosed herein.

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the general description above and the detailed description of the drawings below, are used to explain the principles of the present invention.

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] Figure 1 It is a structural schematic diagram of the utility model pipe fitting external pressure and internal pressure comprehensive testing device;

[0022] Figure 2 It is a schematic diagram of the appearance of the utility model.

[0023] Description of reference numerals in the figures:

[0024] 1 is the internal pressure test joint, 2 is the bolt,

[0025] 3 is the tooling flange, 4 is the octagonal ring gasket,

[0026] 5 is a butt welding flange, 6 is a nut,

[0027] 7 is a pressure container, 8 is a venting needle cock,

[0028] 9 is a support plate, 10 is a test workpiece,

[0029] 11 is the internal pressure gauge, 12 is the external pressure gauge,

[0030] 13 is an external pressure test joint. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work belong to the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the utility model belongs. The "first", "second" and similar words used in this article do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0032] like Figure 1 , Figure 2 As shown, the utility model pipe fitting external pressure and internal pressure comprehensive test device comprises a pressure container 7, both ends of the pressure container 7 are respectively fixedly connected to the welding flange 5, and the welding flange 5 is detachably fixedly connected to the tooling flange 3 through a plurality of bolts 2 and nuts 6;

[0033] A venting needle cock 8 is provided in the middle of the pressure container 7;

[0034] A support plate 9 is fixedly provided in the inner cavity of the pressure container 7; the outer edge of the support plate 9 matches the inner hole of the pressure container 7; the inner hole of the support plate 9 matches the outer diameter of the test workpiece 10, so that the test workpiece 10 can pass through the inner hole of the support plate 9, and the support of the test workpiece 10 is achieved through the support plate 9; an annular cavity is formed between the pressure container 7 and the test workpiece 10, and the annular cavity serves as the outer cavity of the test workpiece 10;

[0035] The two tooling flanges 3 respectively block the outer ends of the two butt-welding flanges 5 and the two ends of the test workpiece 10 to form an internal pressure test cavity and an external pressure test cavity; the two tooling flanges 3 seal the internal pressure test cavity and the external pressure test cavity from both ends to isolate the internal pressure test cavity and the external pressure test cavity from the outside;

[0036] Preferably, an octagonal annular gasket 4 is provided between the butt-welding flange 5 and the tooling flange 3;

[0037] An inner hole connecting hole is provided in the middle of one of the tooling flanges 3, one end of which is connected to the inner cavity of the test workpiece 10; the other end of the inner hole connecting hole is connected to the internal pressure test joint 1, and the internal pressure test joint 1 is used to connect the internal pressure test device;

[0038] The tooling flange 3 is also provided with an external hole connecting hole and an external pressure connecting hole, one end of the external hole connecting hole is connected to the outer cavity of the test workpiece 10; the other end of the external hole connecting hole is connected to the external pressure test joint 13, and the external pressure test joint 13 is used to connect the external pressure test device;

[0039] One end of the external pressure connecting hole is connected to the external cavity of the test workpiece 10; the other end of the external pressure connecting hole is connected to the external pressure gauge 12, and the external pressure gauge 12 is used to measure the pressure of the external pressure test cavity;

[0040] An internal pressure communicating hole is provided in the middle of the other tooling flange 3, one end of which is connected to the inner cavity of the test workpiece 10; the other end of the internal pressure communicating hole is connected to an internal pressure gauge 11, and the internal pressure gauge 11 is used to measure the pressure of the internal pressure test cavity;

[0041] Furthermore, the end of the pressure container 7 is fixedly connected to the butt-welding flange 5 by welding.

[0042] The utility model forms an internal pressure test chamber and an external pressure test chamber that are isolated from each other, and can measure the pressures of the internal pressure test chamber and the external pressure test chamber separately or simultaneously, thereby testing the external pressure strength, internal pressure strength and the combined internal and external pressure strength of the steel pipe.

[0043] The working principle of the utility model is as follows:

[0044] Pass the test workpiece 10 through the internal support plate 9, put the octagonal ring gasket 4 on the butt-welding flange 5, then butt the tooling flange 3 with the butt-welding flange 5, and then fasten the tooling flange 3 with the butt-welding flange 5 by bolts 2 and nuts 6;

[0045] Use the external pressure test joint 13 as the pressure injection port, inject water into the external pressure test chamber, open the vent needle cock 8 to exhaust the air, until water flows out of the vent needle cock 8, at which time the air in the external pressure test chamber has been completely exhausted; then screw in the vent needle cock 8 until it is tightened, and then connect the external pressure gauge 12;

[0046] Use the internal pressure test joint 1 as the pressure injection port, inject water into the internal pressure test chamber, and remove air from the other end until the liquid flows out from the interface of the internal pressure gauge 11. At this time, the air in the internal pressure test chamber has been completely removed, and then screw in the internal pressure gauge 11 until it is tightened;

[0047] By observing the internal pressure gauge 11 and the external pressure gauge 12 respectively, the pressure of the internal pressure test chamber and the external pressure test chamber can be measured.

[0048] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and modifications.

Claims

1. A comprehensive test device for external and internal pressure of pipe fittings, characterized in that: include: The pressure vessel has butt-welding flanges fixedly connected at both ends; A support plate is fixedly arranged in the inner cavity of the pressure vessel and is used to support the test workpiece; a cavity is formed between the pressure vessel, the butt-welding flange and the test workpiece, and the cavity serves as an external pressure test cavity; and the inner cavity of the test workpiece serves as an internal pressure test cavity; as well as Two tooling flanges are respectively fixedly connected to the butt welding flange in a detachable manner; the tooling flanges seal both ends of the external pressure test cavity and the internal pressure test cavity; One of the tooling flanges is provided with an inner hole connecting hole, one end of which is connected to the internal pressure test chamber, and the other end of which is connected to the internal pressure test joint; the tooling flange is also provided with an outer hole connecting hole and an external pressure connecting hole, one end of which is connected to the external pressure test chamber, and the other end of which is connected to the external pressure test joint; one end of the external pressure connecting hole is connected to the external pressure test chamber, and the other end of the external pressure connecting hole is connected to the external pressure gauge; Another tooling flange is provided with an internal pressure communicating hole, one end of the internal pressure communicating hole is communicated with the internal pressure testing cavity, and the other end of the internal pressure communicating hole is connected to an internal pressure gauge.

2. The comprehensive test device for external and internal pressure of pipe fittings according to claim 1 is characterized in that: The tooling flange is detachably fixedly connected to the butt-welding flange by means of a plurality of bolts.

3. The comprehensive test device for external and internal pressure of pipe fittings according to claim 1 is characterized in that: The pressure container is provided with a venting vortex.

4. The comprehensive test device for external and internal pressure of pipe fittings according to claim 1 is characterized in that: The pressure container is provided with a venting needle cock.

5. The comprehensive test device for external and internal pressure of pipe fittings according to claim 1 is characterized in that: The outer edge of the support plate matches the inner hole of the pressure container; the inner hole of the support plate matches the outer diameter of the test workpiece.

6. The comprehensive test device for external and internal pressure of pipe fittings according to claim 1 is characterized in that: A gasket is arranged between the butt welding flange and the tooling flange.

7. The comprehensive test device for external and internal pressure of pipe fittings according to claim 1 is characterized in that: An octagonal annular gasket is arranged between the butt welding flange and the tooling flange.

8. The comprehensive test device for external and internal pressure of pipe fittings according to claim 1 is characterized in that: The end of the pressure container is fixedly connected to the butt-welding flange by welding.

9. The comprehensive test device for external and internal pressure of pipe fittings according to claim 1, characterized in that: The internal pressure test joint is connected to an internal pressure test device.

10. The comprehensive test device for external and internal pressure of pipe fittings according to claim 1 or 9, characterized in that: The external pressure test connector is connected to an external pressure test device.

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