CN216815919U - Pipeline open end sealing assembly and pressurizing sealing test equipment for same - Google Patents

Abstract

The utility model relates to a pipeline open end sealing assembly and a pressurizing sealing test device for the pipeline open end sealing assembly. The pipeline open end seal assembly includes: a conduit having an open end to be sealed; the cover portion covers and is sleeved outside the opening end, the cover portion is provided with a fixing structure on the surface of the inner peripheral wall in the radial direction, and the filling portion is filled between the cover portion and the pipeline without a gap and is also filled in the inner space of the opening end without a gap.

Description

Pipeline open end sealing assembly and pressurizing sealing test equipment for same

Technical Field

The utility model relates to a pipeline opening end sealing assembly, in particular to a sealing assembly which enables the pipeline opening end to be assembled quickly and in high strength, and belongs to the technical field of pipeline opening end sealing assembly. The utility model also relates to a pressurizing sealing test device for the pipeline open end sealing assembly.

Background

To meet the relevant regulations, the piping of an aircraft fuel system must be designed and installed to allow a reasonable degree of deformation and stretching without leaking. Thus, further challenges are posed to assembly strength and sealing, particularly at the ends of the pipeline and at the joints where the pipeline is connected to the pipeline, equipment.

The pipeline belongs to a section bar commonly used in industry, and a system required by the pipeline construction is widely applied to a plurality of devices or products (including airplanes). Generally, the pipeline is hermetically connected between the end of the pipeline and equipment through a special finished part joint. For example, CN204986221U, entitled "double-layer oil supply sleeve for hanging large airplane", discloses a double-layer pipeline and a flexible joint, which are designed as finished joints at the joints where pipelines are connected to each other, and are installed and used on the airplane, and are generally welded or pressed on the pipelines by special equipment.

However, the existing finished part joints are generally limited to corresponding application scenarios, for example, only suitable for pipelines with shapes matching with the finished part joints, and therefore the shapes and sizes of the pipelines are limited, and the existing finished part joints cannot be suitable for blind pipes or equipment with non-standard configurations (without special interfaces), that is, all pipeline connections cannot be realized through the existing finished part joints.

In order to meet the requirements of high-strength assembly and sealing, the conventional method is to design a special end sealing element, complete the assembly and connection of the pipeline in a welding mode or a crimping mode by adopting special equipment, and manufacture a special inner pipe interface and a special outer pipe interface for the double-layer pipeline so as to realize the pressurizing and sealing of the double-layer pipeline.

The welding mode is complex in process, high in technological requirement and high in assembly cost, the strength of a metal pipe of the pipeline is reduced sharply due to the fact that the metallographic phase of the metal pipe is changed, the performance of a pipeline product is affected, the welding tightness is affected by the technology, and the yield of end sealing pieces capable of meeting the required airtightness requirement is low.

The crimping mode needs special large-scale crimping equipment and a special die, the method is suitable for mass production of finished parts with a certain specific configuration, is not suitable for the conditions that pipelines with various configurations and small batches are possibly encountered in a single case, and has the defects of high process requirement, long processing period, single pipeline configuration adaptability (the special die needs to be manufactured again when pipeline materials, sizes, forms and the like are different) and the like.

In addition, after the pipeline is sealed and assembled, large-scale detection equipment needs to be built in a field for testing the sealing performance of the pipeline adopting the finished part joint. At present, no portable detection equipment suitable for pressurization and tightness of double-layer pipelines exists.

Accordingly, there remains a need for further improvements in existing open end of line seal assemblies and pressurized seal testing equipment for open end of line seal assemblies.

SUMMERY OF THE UTILITY MODEL

In view of the above problems in the prior art, an object of the present invention is to provide a sealing assembly for an open end of a pipeline and a testing apparatus for the sealing assembly, so as to achieve rapid and high-strength assembly of the open end of the pipeline, and have a wide range of applicable pipeline configurations.

In order to solve the above problems, the present invention provides a pipe open end sealing assembly, comprising: a pipe having an open end to be sealed; the cover portion covers and is sleeved outside the opening end, the cover portion is provided with a fixing structure on the surface of the inner peripheral wall in the radial direction, and the filling portion is filled between the cover portion and the pipeline without a gap and is also filled in the inner space of the opening end without a gap.

According to one aspect of the utility model, the securing structure is a male thread, a flange or a plurality of protrusions, or a female thread, a groove or a plurality of recesses.

According to an aspect of the present invention, the pipe open end sealing assembly further comprises a surrounding net surrounding the open end in a radial direction of the pipe and embedded in the filling part.

According to one aspect of the utility model, the open end seal assembly further comprises a holder, a first end of the holder being secured to the non-open end portion of the pipeline and a second end of the holder being secured to the cover portion.

According to an aspect of the present invention, the pipe open end sealing assembly further includes a second pipe configured to be fitted outside the pipe concentrically with the pipe, a cylindrical and hollow space is formed in a space between the second pipe and the pipe, and the second pipe has a second open end to be sealed and corresponding to the open end, the cover portion further covers and is fitted outside the second open end, and the filling portion is filled between the cover portion and the second pipe without a gap and is also filled in the space between the second open end and the open end without a gap.

According to an aspect of the present invention, the pipe open end sealing assembly further comprises a surrounding net surrounding the second open end in a radial direction of the second pipe and embedded in the filling portion.

According to one aspect of the utility model, the conduit open end seal assembly further comprises a bracket, a first end of the bracket being secured to a portion of the second conduit other than the second open end, and a second end of the bracket being secured to the cover portion.

According to an aspect of the present invention, the tube open end seal assembly further includes a test tube inserted through the cover portion in the axial direction and partially extending into the tube, and a second test tube inserted through the cover portion in the axial direction and partially extending into a space between the second tube and the tube.

According to one embodiment of the present invention, a pressurized seal testing apparatus includes: a fluid container containing a fluid to be input; a pump assembly connected to the fluid container by the supply tube and fluidly connected to the test tube of the line open end seal assembly according to any of the above aspects via the input tube; a valve assembly disposed on the input pipe and selectively opening and closing the input pipe; the control assembly controls the pump assembly and the valve assembly; and a pressure testing assembly connected to the input tube downstream of the valve assembly and acquiring corresponding pressure data.

According to one aspect of the utility model, the pump assembly is fluidly connected to a second test line of the line open end seal assembly through a second input line, and further includes a second valve assembly disposed on the second input line selectively opening and closing the second input line, and the control assembly controls the second valve assembly, and the pressure test assembly is connected to the second input line downstream of the second valve assembly and acquires corresponding pressure data.

Compared with the existing finished product connector, the pipeline opening end sealing assembly can realize quick and high-strength assembly, has wide applicable pipeline configuration range (without limiting pipeline materials, pipeline sizes and pipeline forms), and has low manufacturing and assembling cost.

Drawings

For a more complete understanding of the present invention, reference is made to the following description of exemplary embodiments taken in conjunction with the accompanying drawings. The drawings are to scale and are not necessarily to scale, emphasis instead being placed upon clearly illustrating the drawings.

In the drawings:

FIG. 1 is a cross-sectional view of a conduit open end seal assembly according to a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of a cover portion according to one embodiment of the present invention;

FIG. 3 is a cross-sectional view of a cover portion according to a preferred embodiment of the present invention;

fig. 4 is a schematic view of a line open end seal assembly and a pressurized seal testing apparatus for the line open end seal assembly according to a preferred embodiment of the present invention.

List of reference numbers:

1 pipeline open end seal assembly

10 cover part

10a inner peripheral wall surface

11 fixing structure

20 test tube

30 second test tube

40 surrounding net

50 pipeline

51 open end

60 second pipeline

61 second open end

70 support

100 pressurization sealing test equipment

101 fluid container

102 pump assembly

103 valve assembly

104 control assembly

105 pressure test assembly

106 second valve assembly

Detailed Description

The utility model will be further described in the following description with reference to specific embodiments and the accompanying drawings, in which more details are set forth to provide a thorough understanding of the utility model, but it will be apparent that the utility model can be practiced in many other ways than those specifically described herein, and that a person skilled in the art can, without departing from the spirit of the utility model, make similar generalizations and deductions to the actual application, and therefore the scope of the utility model should not be limited by the contents of this specific embodiment.

In various embodiments of the present invention, an "axial direction" is defined as a direction in which the pipe extends, and a "radial direction" is defined as a direction perpendicular to the direction in which the pipe extends.

Fig. 1 schematically illustrates a pipeline open end seal assembly 1 according to a preferred embodiment of the present invention, wherein the pipe wall of the pipeline is partially removed to show the relative positions of the various components in the pipeline open end seal assembly 1.

In a preferred embodiment, the conduit open end seal assembly 1 generally comprises a double layer conduit 50, 60 of an aircraft fuel system and a cover portion 10 covering the open end of the double layer conduit, and the cover portion 10 is fitted over the open end to isolate the conduit 50, 60 from the environment. The double-layered tubing of the preferred embodiment specifically includes an inner layer of tubing 50 and an outer layer of second tubing 60, which are both thin walled tubes, and preferably, the remaining inner layer of tubing 50 is slightly longer than the outer layer of second tubing 60 when the tubes are cut.

It will be appreciated that the pipe open end seal assembly 1 according to the preferred embodiment of the present invention may also be used for sealing of single layer pipes, as will be described in detail below.

Fig. 2 schematically shows a cover portion 10 at an open end 51 for a single-layer pipe 50 according to one embodiment of the utility model. Previously described components are similarly numbered in subsequent figures and are not re-described for brevity.

The cover portion 10 is substantially cylindrical with an opening, and has a fixing structure 11 for fixing the filling material of the filling portion on an inner peripheral wall surface 10a in the radial direction. The securing structure 11 is illustrated as a plurality of recesses, but it will be appreciated that the form of the securing structure 11 is not so limited, and may be a male structure, such as a male thread, flange or plurality of protrusions, or a female structure, such as a female thread, groove or plurality of recesses.

The sealing assembly of the cover portion 10 with the pipeline 50 is achieved using a filling portion, and the pipeline portion to be sealed can be selectively detached to be assembled before assembly according to the installation position and space of the pipeline system. During assembly, a filling material is applied between the cover part 10 and the duct 50, the filling material being a thermosetting resin, preferably an epoxy resin, having a first state of gel and a second state of solid state.

The line 59 and the cover 10 are first treated to remove rust and oxide. The opening of the cover 10 is then directed vertically upwards and the conduit 50 is inserted vertically downwards 1 into the opening of the cover 10 and held stationary. With the filling material of the filling portion in the first state, it is injected and filled in the cover portion 10 so that the filling portion is filled between the cover portion 10 and the duct 50 without a gap and also filled in the internal space of the open end 51 without a gap. In this way, the open end of the pipeline is hermetically sealed from the external environment. Thereafter, the filling portion is left standing for a certain time to be solidified and in a second state.

Further, heating may be performed by using a heating device other than the shielding portion 10. The curing of the filling part can be accelerated by raising the filling part to a certain temperature, so that the filling part can reach the use strength in a short time. It is to be understood that the specific heating means is not limited, such as the small sun which is commonly used in life, and the temperature in the vicinity of the shielding part 10 is measured and maintained by a thermometer, preferably maintained at approximately 60 ℃, and the heating time is approximately 12 hours.

It will be appreciated that the use of the pipe open end seal assembly 1 according to the utility model is not limited to the number of layers, shape and size of the pipe.

Returning now to fig. 1, the conduit open end seal assembly 1 according to the preferred embodiment further comprises an outer layer of a second conduit 60, wherein the second conduit 60 is configured to fit over the conduit 50, preferably concentrically over the conduit 50, and a cylindrical and hollow space is formed between the second conduit 60 and the conduit 50. The second conduit 60 has a second open end 61 to be sealed and corresponding to the open end 51. The cover portion 10 also covers and fits over the second open end 61. The filling portion is filled without a gap between the cover portion 10 and the second duct 60, and also filled without a gap in the space between the second open end 61 and the open end 51.

The pipeline open end sealing assembly 1 according to the preferred embodiment may optionally further comprise a containment net 40 and a stand 70 for supporting the cover section 10.

In the case where higher strength is required at the open end of the pipe end or at the joint where the pipes are connected, and the strength cannot be satisfied by using a pure thermosetting resin for the filler, it is possible to reinforce the tear resistance and shear strength of the filler by winding a fiber material around the open end of the pipe and mixing the fiber material in the filler, in addition to appropriately lengthening the axial length of the covering portion. A preferred embodiment of the containment net 40 will be described below.

First finely divided fibrous material (preferably carbon fibre filaments of about 5mm in length) is placed in the filling material forming the filling section sufficiently submerged, then a portion of the fibrous material is fished out and wrapped around the end of the pipe, and then the remaining filling material fills the end of the pipe in the manner previously described. In this way, after the filler material is cured, the fiber material forms the surrounding net 40, surrounds the open ends 51 and the second open ends 61 in the radial direction of the pipe 50 and the second pipe 60, and is embedded in the filler material of the filling portion. It is contemplated that for single layer pipe embodiments such as shown in fig. 2, the containment net 40 only encloses the open end 51.

A first end of the bracket 70 may be secured to a portion of the second conduit 60 of the outer layer not corresponding to the second open end 61 and a second end of the bracket 70 is secured to the cover portion 10 to maintain their relative positions. It is envisaged that for embodiments of single layer tubing such as that shown in figure 2, the first end of the bracket 70 may be secured to a portion of the tubing 50 other than the open end 51, with the second end of the bracket 70 still abutting the cover portion 10. The bracket 70 may be placed or mounted on the ground of the installation site, a fixed structure, etc. as desired to maintain stability of itself.

It is understood that, for the joints where the pipelines are connected with the pipelines and the equipment, the joints can be sealed layer by layer in the above manner.

Furthermore, to facilitate testing of the sealing of the cover portion 10 to the open end 51, the line open end seal assembly 1 further comprises a test tube 20, 30 in fluid communication with the pump assembly of the pressurized sealing test apparatus 100, the test tube 20 being inserted in an axial direction through the cover portion 10 and extending partially into the line 50, the second test tube 30 being inserted in an axial direction through the cover portion 10 and extending partially into the space between the second line 60 and the line 50.

To avoid the test tubes 20, 30 also becoming clogged with plugs, the test tubes 20, 30 preferably extend into the conduit beyond the ends 51, 61, and more preferably extend a length greater than 5 cm. It is contemplated that for single layer tubing embodiments such as shown in fig. 2, tubing open end seal assembly 1 includes only test tube 20 extending into tubing 50, and does not include second tubing 60.

Fig. 3 schematically shows a cover portion 10 at the open end for a double-layer pipe according to a preferred embodiment of the present invention. In contrast to fig. 2, the cover portion 10 of fig. 3 has two holes in the axial direction for the test tubes 20, 30 to pass through.

Fig. 4 schematically illustrates a pipeline having both ends provided with the pipeline open-end seal assembly 1 of the preferred embodiment, and a pressurized seal testing apparatus 100 for the pipeline open-end seal assembly 1. The pressurized sealing test apparatus 100 includes: a fluid reservoir 101 for containing a fluid to be input, a pump assembly 102 for supplying the fluid, valve assemblies 103, 106 for controlling the fluid communication, a control assembly 104 for controlling the pump assembly 102, the valve assemblies 103, 106, and a pressure testing assembly 105 for acquiring pressure data.

As shown in fig. 4, the pump assembly 102 is connected to the fluid container 101 by a supply tube (shown schematically in fig. 4). The pressurized sealing test apparatus 100 is preferably compact, modular, easy to transport in the field by backpack or cart, and easy to connect to the test tubes 20 and/or 30 of the line open end seal assembly 1. Thus, the maximum head of the pump assembly 102 can be small as long as the pressure required for aircraft fuel line testing is met (60 psig for civilian aircraft fuel double-layer lines is recommended).

In the embodiment of fig. 4, the pump assembly 102 is in fluid communication with the test tube 20 and/or the second test tube 30 of the line open end seal assembly 1 from the left side of fig. 4 via an input tube (shown schematically) and/or a second input tube to input fluid to the line 50 and/or the second line 60. And optionally, tubing open end seal assembly 1 may also be used at the other end of tubing 50 and/or second tubing 60, similarly outputting fluid from tubing 50 and/or second tubing 60 via output tubing and back to pump assembly 102. The inner layer pipeline or the outer layer pipeline is selected to be subjected to a pressurizing sealing test by controlling the opening and the closing of the valve assemblies 103 and 106.

A valve assembly 103 is provided on the input pipe and selectively opens and closes the input pipe; a second valve assembly 106 is disposed on and selectively opens and closes the second input line. The control assembly 104 may be an electronic control device, a mechanical control device, etc., capable of accepting an operator's electronic input instructions or being manually controlled by the operator, or autonomously controlling the pump assembly 102, the valve assembly 103, the second valve assembly 106 when conditions are met through prestored execution instructions.

The pressure test assembly 105 is connected to the input pipe downstream of the valve assembly 103 and/or to a second input pipe downstream of the second valve assembly 106 and acquires corresponding pressure data.

According to the requirements of the aircraft fuel system tightness test, for civil aircraft fuel double-layer pipelines, 60psig pressurization is recommended and detection is continuously carried out for 15 minutes, and if pressure data can be maintained, namely no pressure relief is carried out, the successful preparation of the pipeline open end sealing assembly 1 is confirmed.

The pipeline opening end sealing assembly provided by the utility model has the advantages of simple required parts, low requirement on processing precision and low manufacturing cost.

The assembly method of the pipeline open end sealing assembly does not affect the metallographic phase and the strength performance of the metal pipeline, can increase the connection strength of the pipeline end and the pipeline joint, and realizes high-strength assembly. The carbon fiber winding is adopted to enhance the shearing strength, namely, the end head is wound by the impregnated carbon fiber: the tear resistance and the shear strength of the end head can be enhanced.

The pipeline opening end sealing assembly has wide applicable pipeline configuration range (not limited by materials, sizes and forms, but also can be applied to three or more layers of pipelines), and has low assembly cost, low process requirement and high yield.

The pressurizing and monitoring equipment can be matched with a pipeline opening end sealing assembly, is suitable for the sealing condition of pipelines at two sides, and can carry out pressurizing sealing test (after end assembly) and pressure data measurement on the pipeline on site.

While various embodiments have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to those skilled in the relevant art that the disclosed subject matter can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and not restrictive.

Claims (10)

1. An open end of pipe seal assembly, the open end of pipe seal assembly comprising:

a conduit (50), the conduit (50) having an open end (51) to be sealed;

a cover portion (10), the cover portion (10) covering and fitting outside the open end (51), and the cover portion (10) having a fixing structure (11) on an inner peripheral wall surface (10a) in a radial direction, an

A filling portion that fills without a gap between the cover portion (10) and the duct (50), and also fills without a gap in an inner space of the open end (51).

2. The conduit open end seal assembly of claim 1,

the fixing structure (11) is a convex thread, a flange or a plurality of protrusions, or a concave thread, a groove or a plurality of depressions.

3. The tubular open end seal assembly of claim 1,

further comprising a surrounding net (40), said surrounding net (40) surrounding said open end (51) in a radial direction of said pipe (50) and being embedded in said filling portion.

4. The conduit open end seal assembly of claim 1,

further comprising a bracket (70), a first end of the bracket (70) being fixed to a portion of the conduit (50) other than the open end (51), and a second end of the bracket (70) being fixed to the cover portion (10).

5. The tubular open end seal assembly of claim 1,

further comprising a second pipe line (60), the second pipe line (60) being configured to be fitted over the pipe line (50) concentrically with the pipe line (50), a cylindrical and hollow space being formed in a space between the second pipe line (60) and the pipe line (50), and the second pipe line (60) having a second open end (61) to be sealed and corresponding to the open end (51),

the covering part (10) also covers and is sleeved outside the second opening end (61), and

the filling section is filled without a gap between the cover section (10) and the second duct (60), and is also filled without a gap in a space between the second open end (61) and the open end (51).

6. The conduit open end seal assembly of claim 5,

further comprising a surrounding net (40), said surrounding net (40) surrounding said second open end (61) in a radial direction of said second pipe (60) and being embedded in said filling portion.

7. The manifold open end seal assembly of claim 5,

further comprising a bracket (70), a first end of the bracket (70) being fixed to a portion of the second conduit (60) other than the second open end (61), and a second end of the bracket (70) being fixed to the cover portion (10).

8. The conduit open end seal assembly of claim 5,

further comprising a test tube (20) and a second test tube (30), the test tube (20) being inserted in the axial direction through the cover portion (10) and extending partially into the conduit (50), the second test tube (30) being inserted in the axial direction through the cover portion (10) and extending partially into a space between the second conduit (60) and the conduit (50).

9. A pressurized seal testing apparatus, the pressurized seal testing apparatus comprising:

a fluid container (101), the fluid container (101) containing a fluid to be input;

a pump assembly (102), the pump assembly (102) being connected to the fluid container (101) by a supply tube, and the pump assembly (102) being fluidly connected to the test tube (20) of the line open end seal assembly according to claim 8 via an input tube;

a valve assembly (103), the valve assembly (103) being disposed on the input pipe and selectively opening and closing the input pipe;

a control assembly (104), the control assembly (104) controlling the pump assembly (102), the valve assembly (103); and

a pressure testing assembly (105), the pressure testing assembly (105) connected to the input tube downstream of the valve assembly (103) and acquiring corresponding pressure data.

10. The pressurized seal testing apparatus of claim 9,

the pump assembly (102) being fluidly connected to a second test tube (30) of the line open end seal assembly of claim 8 via a second input tube, and

further comprising a second valve assembly (106), the second valve assembly (106) disposed on the second input pipe, selectively opening and closing the second input pipe, and

the control assembly (104) controls the second valve assembly (106), and

the pressure test assembly (105) is connected to the second input pipe downstream of the second valve assembly (106) and acquires corresponding pressure data.

Images