CN114607847A - Pipe connector and aeroengine - Google Patents

Pipe connector and aeroengine Download PDF

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Publication number
CN114607847A
CN114607847A CN202011400690.1A CN202011400690A CN114607847A CN 114607847 A CN114607847 A CN 114607847A CN 202011400690 A CN202011400690 A CN 202011400690A CN 114607847 A CN114607847 A CN 114607847A
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CN
China
Prior art keywords
joint
connector
slot
wall
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011400690.1A
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Chinese (zh)
Inventor
王光强
戴佳莉
陶金
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AECC Commercial Aircraft Engine Co Ltd
Original Assignee
AECC Commercial Aircraft Engine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AECC Commercial Aircraft Engine Co Ltd filed Critical AECC Commercial Aircraft Engine Co Ltd
Priority to CN202011400690.1A priority Critical patent/CN114607847A/en
Publication of CN114607847A publication Critical patent/CN114607847A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/0206—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the collar not being integral with the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
    • F16L19/0218—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means comprising only sealing rings

Abstract

The invention relates to the technical field of pipeline connection, in particular to a pipe connector and an aircraft engine. The pipe connector of the present invention comprises: the first joint is internally provided with a first flow channel; the second joint is internally provided with a second flow passage which is communicated with the first flow passage; wherein, be equipped with the slot on the lateral wall of first joint, the second connects including the grafting section, and the grafting section inserts in the slot to, be equipped with first sealing washer and second sealing washer respectively between the radial inner wall and the radial outer wall of grafting section and slot, the second connects through first sealing washer and second sealing washer and first joint sealing fit. Therefore, the inner seal and the outer seal are formed between the first joint and the second joint, and the sealing reliability of the pipe connector can be effectively improved.

Description

Pipe connector and aeroengine
Technical Field
The invention relates to the technical field of pipeline connection, in particular to a pipe connector and an aircraft engine.
Background
The pipe connector is widely used in occasions such as aeroengines and the like, and is mainly used for realizing connection between pipelines so as to realize sealing and conveying of fluid.
In the related art, only a single seal is formed between the first joint and the second joint of the pipe connector, and the reliability of the seal is relatively poor.
Disclosure of Invention
The invention aims to solve the technical problems that: the sealing reliability of the pipe connector is improved.
In order to solve the above technical problem, the present invention provides a pipe connector, including:
the first joint is internally provided with a first flow channel; and
the second joint is internally provided with a second flow passage which is communicated with the first flow passage;
wherein, be equipped with the slot on the lateral wall of first joint, the second connects including the grafting section, and the grafting section inserts in the slot to, be equipped with first sealing washer and second sealing washer respectively between the radial inner wall and the radial outer wall of grafting section and slot, the second connects through first sealing washer and second sealing washer and first joint sealing fit.
In some embodiments, a first mounting groove is formed on the radial inner wall of the slot, and the first sealing ring is arranged in the first mounting groove; and/or a second mounting groove is formed in the outer wall of the insertion section, and a second sealing ring is arranged in the second mounting groove.
In some embodiments, the slot is configured to be at least one of:
the radial inner wall of the slot is parallel to the axis of the first flow channel;
the radial outer wall of the slot is parallel to the axis of the first flow channel;
the slot is U-shaped.
In some embodiments, the ends of the plug segments are chamfered.
In some embodiments, the second connector further comprises a first protrusion connected to the plug section and protruding from the plug section radially outward of the second connector, the first protrusion being located outside the first connector.
In some embodiments, the second connector further comprises a second protrusion connected to an end of the first protrusion remote from the plug section and protruding from the second protrusion towards a radial outside of the second connector.
In some embodiments, the pipe connector further comprises a nut that is sleeved outside the first connector and is threadedly connected with the second connector.
In some embodiments, the nut is threadably connected to the first boss of the second fitting.
In some embodiments, the nut has a lockwire hole therein, and the pipe connector further includes a fuse connected to the lockwire hole.
The invention additionally provides an aircraft engine which comprises the pipe connector in the embodiment of the invention.
Based on the cooperation of grafting section, slot, first sealing washer and second sealing washer, form inside and outside twice between first joint and the second joint sealed, can effectively improve the sealing reliability of pipe connector.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view showing a usage state of a tube connector according to an embodiment of the present invention.
Fig. 2 is an exploded view of fig. 1.
Fig. 3 is a cross-sectional view of fig. 1.
Fig. 4 is a partially enlarged view E of fig. 3.
In the figure:
10. a tube connector; 20. a first tube; 30. a second tube;
1. a first joint; 11. a receiving section; 12. a first connection section; 13. a first flow passage; 14. a slot; 15. a first mounting groove;
2. a second joint; 21. a plug section; 22. a first convex portion; 23. a second convex portion; 24. a second connection section; 25. a second flow passage; 26. a second mounting groove;
3. a nut; 31. a substrate; 32. a boss; 33. a lockwire hole;
4. a first seal ring;
5. and a second seal ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
In the description of the present invention, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for the convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1-4 exemplarily show a pipe connector of the present invention.
Referring to fig. 1 to 4, a tube connector 10 is used to connect a first tube 20 and a second tube 30, enabling communication between the first tube 20 and the second tube 30.
Referring to fig. 1-3, a tube connector 10 includes a first fitting 1, a second fitting 2, and a nut 3.
The first and second joints 1 and 2 are used to connect with the first and second pipes 20 and 30, respectively. The second joint 2 is inserted into the first joint 1. The nut 3 is sleeved outside the first joint 1 and is in threaded connection with the second joint 2, so that the second joint 2 is locked and fixed after the second joint 2 is inserted into the first joint 1. The first connector 1 and the second connector 2 may also be referred to as a female connector and a male connector, respectively.
The first joint 1 and the second joint 2 are respectively provided with a first flow passage 13 and a second flow passage 25 therein. The first flow passage 13 and the second flow passage 25 communicate with each other. And the first flow passage 13 is for communication with the first pipe 20. The second flow passage 25 is for communication with the second tube 30. Thus, the pipe connector 10 communicates the first pipe 20 and the second pipe 30 so that fluid can flow between the first pipe 20 and the second pipe 30, and the transfer of the fluid is achieved.
In order to prevent fluid leakage, the connection between the first joint 1 and the second joint 2 is sealed.
In the related art, in order to achieve the sealing connection between the first joint 1 and the second joint 2, the second joint 2 is inserted into the first flow passage 13, and the inner wall of the first joint 1 is configured to have a tapered surface, and the outer wall of the portion of the second joint 2 inserted into the first flow passage 13 is configured to have a spherical surface, and the spherical surface of the second joint 2 is in contact with the tapered surface of the first joint 1 and is compressed to perform a sealing function under the tightening torque of the nut 3 and the second joint 2.
The above-described related art pipe connector 10 has the following problems:
(1) the sealing reliability is poor. Only a single seal is formed between the first joint 1 and the second joint 2 at the contact part of the spherical surface and the conical surface, the sealing reliability is relatively poor, and once the single seal fails, leakage can occur to cause accidents. This problem is particularly acute when the pipe connector 10 is used to connect fuel lines in an aircraft engine or the like. On the one hand, the working environment of the aircraft engine is severe, vibration is more, thermal deformation is larger, and therefore, the single-channel seal is more prone to failure. On the other hand, when the pipe connector 10 is connected to a fuel pipeline, the fluid in the pipeline is fuel oil, which is combustible liquid, and once leakage occurs, a very serious safety accident may be caused.
(2) The processing difficulty is large. The spherical surface and the conical surface are matched to form sealing, the requirements on the size precision, the shape and position precision and the surface roughness of the spherical surface and the conical surface are high, and the processing difficulty is high.
(3) The difficulty of assembly operation is great. The length that closes soon of nut 3 on second connects 2 influences sealed effect great, if close length soon short, then the hold-down torque undersize, sealed tight, reveals easily, and if close length overlength soon, then hold-down torque is too big, leads to contact department to take place plastic deformation easily, causes the irreversible damage of structure, so, close length requirement height soon to nut 3, increases the assembly operation degree of difficulty.
(4) The axial direction cannot be adjusted. Since the first pipe 20, the second pipe 30 and the pipe connector 10 may have machining and assembling errors themselves, and other pipe assemblies (including the first pipe 20, the second pipe 30 and the pipe connector 10) to which the first pipe 20 and the second pipe 30 are connected may also have machining and assembling errors, that is, machining and assembling errors may exist between each pipe assembly itself and each pipe assembly in the piping system, when the pipe connector 10 connects the first pipe 20 and the second pipe 30, an actual axial gap between the first joint 1 and the second joint 2 may not be consistent with a preset axial gap. In the related art, the screwing length of the nut 3 is high in requirement and cannot be adjusted at will, so that after the nut 3 is connected, the axial gap between the first connector 1 and the second connector 2 is difficult to adjust, and the axial error of the whole pipeline system in the processing and assembling processes cannot be compensated.
In view of the above, the embodiment of the present invention improves the structure of the pipe connector 10.
Referring to fig. 1 to 3, in some embodiments of the present invention, a slot 14 is provided on a side wall of the first connector 1, the second connector 2 includes an insertion section 21, the insertion section 21 is inserted into the slot 14, a first sealing ring 4 and a second sealing ring 5 are respectively provided between the insertion section 21 and a radial inner wall and a radial outer wall of the slot 14, and the second connector 2 is hermetically connected to the first connector 1 through the first sealing ring 4 and the second sealing ring 5.
It will be understood that the socket 14 is an annular groove provided on the side wall of the first connector 1, and the radially inner wall and the radially outer wall of the socket 14 are respectively groove walls of the socket 14 arranged in sequence from inside to outside along the radial direction of the first flow passage 13 (also the radial direction of the first connector 1, the second connector 2 and the pipe connector 10). The radially inner wall and the radially outer wall of the insertion groove 14 are opposed to each other.
Based on the above arrangement, an inner seal and an outer seal corresponding to the first seal ring 4 and the second seal ring 5 are formed between the first joint 1 and the second joint 2, so that the inner seal and the outer seal are redundant to each other, when one of the seals fails, the other seal can still play a role in sealing, and fluid leakage is prevented, so that the sealing reliability of the pipe connector 10 can be effectively improved, and the risk of fluid leakage and even safety accidents is reduced.
Moreover, the double-sealing structure based on the double sealing rings enables sealing to be independent of matching between the spherical surface and the conical surface with high machining precision requirements, and therefore machining difficulty and machining cost are reduced. From another perspective, the reduction of the processing difficulty can also reduce the risk of the sealing failure caused by the processing error, and further can improve the sealing reliability.
In addition, when the double-sealing structure based on the double sealing rings is adopted, the required double sealing effect can be realized as long as the inserting section 21 is inserted into the inserting groove 14 and the first sealing ring 4 and the second sealing ring 5 are pressed tightly, and the screwing length of the nut 3 on the second joint 2 is changed within a certain range, so that the first sealing ring 4 and the second sealing ring 5 can be pressed tightly, therefore, the requirements on the screwing torque and the screwing length of the nut 3 can be reduced, the screwing length between the nut 3 and the second joint 2 can be changed within a certain range, the assembling difficulty can be reduced, meanwhile, the axial clearance between the first joint 1 and the second joint 2 can be adjusted, the axial error during the processing and assembling of the pipeline system can be compensated, the pipeline system is not required to be forced to generate axial deformation, the assembling can be completed, and the stress assembly of the pipeline system can be prevented, this is favorable to improving the operational reliability of the pipe-line system, and prolongs the service life of the pipe-line system.
Moreover, the first sealing ring 4 and the second sealing ring 5 are positioned in the same slot 14 and are pressed by the same inserting section 21, so that the structure is simple.
Therefore, the double-sealing structure formed by the matching of the slot 14, the insertion section 21, the first sealing ring 4 and the second sealing ring 5 can improve the sealing reliability of the pipe connector 10, and is beneficial to reducing the processing difficulty and the assembly difficulty of the pipe connector 10 and improving the axial adjustment flexibility of the pipe connector 10.
In order to realize the installation of the first sealing ring 4, referring to fig. 3 and 4, in some embodiments, a first installation groove 15 is formed on a radial inner wall of the insertion groove 14, and the first sealing ring 4 is arranged in the first installation groove 15. In this way, the first sealing ring 4 can be pressed by the insertion section 21 to deform and seal during the insertion of the insertion section 21 into the slot 14, so as to form a first seal on the inner layer. And, first sealing washer 4 can be held by first joint 21 this moment, sets up on the grafting section 21 inner wall with first mounting groove 15, and first sealing washer 4 sets up the condition of in first mounting groove 15 and compares, and first sealing washer 4 is difficult to drop in the assembly process.
In order to mount the second sealing ring 5, referring to fig. 3 and 4, in some embodiments, a second mounting groove 26 is formed on the outer wall of the plug section 21, and the second sealing ring 5 is disposed in the second mounting groove 26. In this way, the second sealing ring 5 can be pressed by the plug section 21 to deform and seal during the process of inserting the plug section 21 into the slot 14, so as to form a second seal at the outer layer. And, the second sealing washer 5 can be held by the grafting section 21 this moment, and compare with the condition that the second mounting groove 26 sets up on the radial outer wall of slot 14, and the second sealing washer 5 sets up in second mounting groove 6, and the second sealing washer 5 is difficult to drop in the assembly process.
In some embodiments, the end of the plug section 21 is chamfered. The chamfer can guide the plug section 21 in the process of inserting the plug section 21 into the slot 14, so as to guide the plug section 21 to be inserted into the slot 14 more smoothly.
The embodiments shown in fig. 1-4 are further described below.
As shown in fig. 1-4, in this embodiment, the pipe connector 10 includes a first fitting 1, a second fitting 2, a nut 3, a first seal ring 4, and a second seal ring 5. The first joint 1, the second joint 2, the nut 3, the first packing 4 and the second packing 5 are engaged so that the pipe connector 10 becomes a double-sealed pipe connector having both inner and outer seals.
First, the structure of the first joint 1 will be described.
The first joint 1 connects the first pipe 20 with the second joint 2.
As shown in fig. 2 and 3, in this embodiment, the first joint 1 includes a receiving section 11 and a first connecting section 12. The first connecting section 12 is used for connecting with the first pipe 20 to realize the connection of the first joint 1 with the first pipe 20. The receiving section 11 is connected to an end of the first connecting section 12 away from the first pipe 20 (i.e. an end close to the second joint 2) for connecting with the first joint 2 to realize the connection of the first joint 1 and the second joint 2.
The radial dimension of accepting section 11 is greater than the radial dimension of first linkage segment 12 for accept section 11 and first linkage segment 12 and connect and form the stair structure, accept the junction of section 11 and first linkage segment 12 and form first locating surface, this first locating surface can with nut 3 joint, in order to realize the location of nut 3 on first joint 1.
The first joint 1 is internally provided with a first flow passage 13 which penetrates through the receiving section 11 and the first connecting section 12. The first flow passage 13 communicates with the second flow passage 25 in the second joint 2 and is adapted to communicate with the first pipe 20 to communicate the first pipe 20 with the second joint 2 and, in turn, the first pipe 20 with the second pipe 30.
The side wall of the receiving section 11 is provided with a slot 14. The slot 14 is used for inserting the insertion section 21 of the second connector 2 to realize the insertion of the first connector 1 and the second connector 2. The insertion slot 14 is an annular groove extending from an end of the receiving section 11 away from the first connecting section 12 toward the first connecting section 12, so that an end of the insertion slot 14 facing the second connector 2 (i.e. a right end of the insertion slot 14 in fig. 3) is open to facilitate insertion of the insertion section 21 of the second connector 2.
The end of the slot 14 opposite to the end facing the second connector 2 (in fig. 3, the left end of the slot 14) is closed to form a slot bottom, and the slot 14 is substantially U-shaped. The groove bottom of the insertion groove 14 can be used to limit the maximum insertion depth of the insertion section 21, i.e. the groove bottom of the insertion groove 14 can be used to limit the maximum screwing length l of the nut 3maxThat is, when the inserting section 21 contacts the bottom of the slot 14, the screwing length of the nut 3 on the second joint 2 can be the maximum screwing length l of the nut 3max。
The radial inner wall and the radial outer wall of the slot 14 are used as sealing surfaces of the first joint 1 and are respectively used for being in sealing fit with the inner wall and the outer wall of the plug section 21 to form inner and outer double-layer sealing.
Wherein, as shown in fig. 3, the radial inner wall of the insertion groove 14 is parallel to the axial direction of the first flow passage 13. At this time, the radial inner wall of the slot 14 is not inclined, so that the processing and the assembly are convenient, and the radial inner wall is also convenient to be matched with the inner wall of the plug section 21 in a sealing way.
As shown in fig. 3 and 4, a first mounting groove 15 is formed on a radial inner wall of the slot 14. The first sealing ring 4 is disposed in the first mounting groove 15, and is used for cooperating with an inner wall of the insertion section 21 to form a first seal.
The surface finish of the radial outer wall of the slot 14 is high, and the slot is used for being matched with a second sealing ring 5 arranged on the outer wall of the insertion section 21 to form a second sealing. Also, as shown in fig. 3, the radially outer wall of the insertion groove 14 is parallel to the axial direction of the first flow passage 13. At this time, the radial outer wall of the slot 14 is not inclined, so that the processing and the assembly are convenient, and the radial outer wall of the slot is also conveniently matched with the outer wall of the plug section 21 in a sealing manner.
Next, the structure of the second joint 2 will be described.
The second joint 2 connects the first joint 1 and the second pipe 30.
As shown in fig. 1 to 3, in this embodiment, the second connector 2 includes a plug section 21, a first convex section 22, a second convex section 23, and a second connecting section 24, which are connected in this order. The plug section 21 and the second connection section 24 are connected to the first connector 1 and the second pipe 30, respectively. The first and second projections 22, 23 are connected between the plug section 21 and the second connection section 24 and are arranged in sequence in the direction from the plug section 21 to the second connection section 24. The radial dimensions of the plug section 21, the first projection 21 and the second projection 22 increase in the order named. The second connecting section 24 has a smaller radial dimension than the second projection 22.
The second flow passage 25 is provided inside the second connector 2, and penetrates through the plug section 21, the first protrusion 22, the second protrusion 23, and the second connection section 24 to communicate the first flow passage 13 with the second pipe 30 to communicate the first pipe 20 with the second pipe 30. As can be seen in fig. 3, in this embodiment, the second flow channel 25 is coaxial with the first flow channel 13.
The plug section 21 is inserted into the slot 14 and forms an inner and outer double seal by sealing engagement with the radially inner and outer walls of the slot 14. The outer wall and the inner wall of the plug section 21 are used as sealing surfaces of the second connector 2 and are used for being in sealing fit with the radial outer wall and the radial inner wall of the first slot 14 to realize double-layer sealing inside and outside.
The inner wall of the plug section 21 has a high surface finish for cooperating with the first sealing ring 4 arranged on the radial inner wall of the insertion groove 14 to form a first seal.
The outer wall of the plug section 21 is provided with a second mounting groove 26. The second sealing ring 5 is arranged in the second mounting groove 26 and is used for matching with the radial outer wall of the slot 14 to realize a second sealing.
In this embodiment, the plug section 21 is in particular cylindrical. Thus, the outer wall and the inner wall of the plug section 21 are both parallel to the axial direction of the second flow channel 25, that is, parallel to the axial direction of the first flow channel 13, so that when the plug section 21 is inserted into the slot 14, the outer wall and the inner wall of the plug section 21 can be in good contact with the radial outer wall and the radial inner wall of the slot 14 parallel to the axial direction of the first flow channel 13 respectively, so as to extrude the first sealing ring 4 and the second sealing ring 5, and thus, tight inner and outer double-layer sealing is realized.
The end of the plug section 21 close to the first tube 20 is chamfered to guide the plug section 21 to be smoothly inserted into the insertion slot 14.
The first projection 22 is connected to the plug section 21 and projects from the plug section 21 radially outward of the second connector 2. The first projection 22 is not inserted into the first joint 1, but is located outside the first joint 1.
The outer wall of the first protrusion 22 may be provided with a thread matching with the thread of the nut 3, so that the nut 3 can be screwed with the first protrusion 22 to realize the threaded connection with the second connector 2.
The first projection 22 is opposed to an end surface of the first joint 1 facing the second joint 2. Specifically, the first protrusion 22 is connected to an end of the insertion section 21 far away from the first pipe 20, and a radial dimension of the first protrusion 22 is greater than a radial dimension of the insertion section 21, so that the first protrusion 22 is connected with the insertion section 21 to form a step structure, and a second positioning surface is formed at a connection position of the first protrusion 22 and the insertion section 21. The second positioning surface is opposite to the end surface of the receiving section 11 facing the second connector 2.
In some cases, the second positioning surface can also be used to limit the maximum screwing length l of the limiting nut 3maxThat is, when the second positioning surface contacts the end surface of the receiving section 11 facing the second joint 2, the screwing length of the nut 3 on the second joint 2 can be the maximum screwing length l of the nut 3max。
In the case of a slot 14 with a slot base and a second contact 2 with a second positioning surface, the maximum screwing length l can be defined by at least one of the slot base and the second positioning surface of the slot 14max. If the second positioning surface is not yet in contact with the end surface of the first connector 1 facing the second connector 2 when the plug-in section 21 is in contact with the bottom of the slot 14, the maximum screwing length l ismaxDefined by the groove bottom of the slot 14. If the second positioning surface is in contact with the end surface of the first connector 1 facing the second connector 2 and the plug-in section 21 is not yet in contact with the bottom of the slot 14, the maximum screwing length l ismaxDefined by the second locating surface. If the second positioning surface is also in contact with the end surface of the first connector 1 facing the second connector 2 when the plug-in section 21 is in contact with the bottom of the slot 14, the maximum screwing length l ismaxBy any of the groove bottom and the second locating face of the slot 14One limitation is acceptable.
The second protrusion 23 is connected to an end of the first protrusion 22 away from the plug section 21, and protrudes from the second protrusion 23 toward a radial outside of the second connector 2. At this time, the radial dimension of the second convex portion 23 is larger than the radial dimension of the first convex portion 22, and the second convex portion 23 is connected with the first convex portion 22 to form a stepped structure. The second convex portion 23 may be configured as a hexahedron.
The second connecting section 24 is connected to an end of the second projection 23 remote from the first projection 22 for connection with the second pipe 30. The radial dimension of the second connecting section 24 is smaller than the radial dimension of the second protrusion 23.
Next, the structure of the nut 3 will be described.
The nut 3 is sleeved outside the first connector 1 and is in threaded connection with the second connector 2.
As shown in fig. 1-3, in this embodiment, the nut 3 includes a base 31 and a boss 32.
Wherein, be equipped with the screw thread on the inner wall of base member 31, with the screw-thread fit on the first convex part 22 outer wall of second joint 2 for nut 3 can connect 2 threaded connection with the second through base member 31.
The boss 32 is connected to the base 31 and is used in conjunction with a screwing tool so that the screwing tool can screw the nut 3 to achieve the coupling or decoupling of the nut 3 to the second connector 2.
The boss 32 may be configured as a hexahedron to facilitate the application of force by a turning tool. And, the boss 32 can be clamped with the first positioning surface to realize the positioning of the nut 3 on the first connector 1.
In order to prevent the nut 3 and the second connector 2 from being accidentally rotated relative to each other after the nut 3 is screwed into place, as shown in fig. 2, a screw hole 33 may be correspondingly formed in the nut 3. A fuse (not shown) is connected to the fuse hole 33 to connect the nut 3 and prevent the nut 3 from rotating after it is screwed into place. The fuse is secured to a structure (e.g., a fixed bracket) other than the pipe connector 10 after passing through the fuse hole 33 of the nut 3 so that the nut 3 cannot be rotated any more after being screwed into place. Or, the second joint 2 may also be correspondingly provided with a locking screw hole 33, and the fuse simultaneously passes through the nut 3 and the locking screw hole 33 on the second joint 2 to connect the nut 3 and the second joint 2, so that the nut 3 cannot rotate relative to the second joint 2 after being screwed in place.
The locking screw hole 33 of the nut 3 may be specifically disposed on the boss 32. The locking screw hole 33 of the second connector 2 may be specifically provided on the second protrusion 23.
The number of the locking screw holes 33 in the nut 3 may be two. In this case, after the nut 3 is screwed into place, a fuse may be cut at each of the two fuse holes 33 to more reliably restrict the bidirectional rotation of the nut 3.
When the pipe connector 10 of this embodiment is assembled, the first joint 1 and the second joint 2 may be connected to the first pipe 20 and the second pipe 30, for example, the first joint 1 and the second joint 2 may be fixed to the first pipe 20 and the second pipe 30 by welding, the first sealing ring 4 and the second sealing ring 5 may be mounted, auxiliary materials such as grease are applied, the insertion section 21 of the second joint 2 is inserted into the insertion slot 14 of the first joint 1 by a small amount, the nut 3 and the second joint 2 are screwed until the screwing length of the nut 3 meets the requirement, and then two fuses are punched on the nut 3 to limit clockwise rotation and counterclockwise rotation of the nut 3.
In the process, the relative movement along the axial direction is generated between the first joint 1 and the second joint 2 by adjusting the screwing length of the nut 3, and the axial clearance between the first joint 1 and the second joint 2 is changed, so that the axial error of the pipeline during processing and assembling is compensated, and the pipeline is prevented from being assembled with stress.
The actual screwing length l of the nut 3 only needs to be at the minimum screwing length lminAnd a maximum spin length lmaxWithin a range, i.e. only lmin≤l≤lmaxAnd the requirements on the screwing moment and the screwing length are lower. Wherein the minimum screwing length lminThe insertion section 21 is required to be in sealing fit with the first sealing ring 4 and the second sealing ring 5; maximum screwing length lmaxThe contact between the insertion section 21 and the bottom of the slot 14 is limited. The specific value of the actual screwing length l can be chosen according to the desired axial clearance between the first joint 1 and the second joint 2.
In this embodiment, since the pipe connector 10 has two inner and outer seals corresponding to the first seal ring 4 and the second seal ring 5, which are redundant with each other, the sealing reliability is high.
Meanwhile, the inner seal and the outer seal of the pipe connector 10 are formed by matching the cylindrical insertion section 21, the slot 14, the first seal ring 4 and the second seal ring 5, and high-precision spherical surfaces and conical surfaces do not need to be machined, so that machining difficulty is low.
When the nut 3 is screwed, the actual screwing length l is only required to be between the minimum screwing length lminAnd a maximum spin length lmaxCan, the requirement on the screwing torque and the screwing length is reduced, therefore, the assembly difficulty is lower, the axial clearance between the first joint 1 and the second joint 2 is adjustable, and the pipeline system can be prevented from being assembled with stress.
It can be seen that the pipe connector 10 of this embodiment has a simple structure, high sealing reliability, low processing difficulty, easy assembly, and is axially adjustable.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A pipe connector (10), comprising:
the first connector (1) is internally provided with a first flow passage (13); and
the second joint (2) is internally provided with a second flow passage (25), and the second flow passage (25) is communicated with the first flow passage (13);
wherein, be equipped with slot (14) on the lateral wall of first joint (1), second joint (2) are including grafting section (21), grafting section (21) insert in slot (14), and, grafting section (21) with be equipped with first sealing washer (4) and second sealing washer (5) between the radial inner wall of slot (14) and the radial outer wall respectively, second joint (2) pass through first sealing washer (4) with second sealing washer (5) with first joint (1) sealed cooperation.
2. A pipe connector (10) according to claim 1, wherein a first mounting groove (15) is provided on a radially inner wall of the receptacle (14), the first sealing ring (4) being disposed in the first mounting groove (15); and/or a second mounting groove (26) is formed in the outer wall of the inserting section (21), and the second sealing ring (5) is arranged in the second mounting groove (26).
3. The pipe connector (10) according to claim 1, wherein the receptacle (14) is configured as at least one of:
the radial inner wall of the slot (14) is parallel to the axis of the first flow passage (13);
the radial outer wall of the slot (14) is parallel to the axis of the first flow passage (13);
the slot (14) is U-shaped.
4. The pipe connector (10) according to claim 1, characterized in that the end of the plug section (21) is chamfered.
5. The pipe connector (10) according to claim 1, wherein the second connector (2) further comprises a first protrusion (22), the first protrusion (22) being connected to the plug section (21) and protruding from the plug section (21) radially outward of the second connector (2), the first protrusion (22) being located outside the first connector (1).
6. A pipe connector (10) according to claim 5, wherein the second connector (2) further comprises a second protrusion (23), the second protrusion (23) being connected to an end of the first protrusion (22) remote from the plug section (21) and protruding from the second protrusion (23) radially outwards of the second connector (2).
7. A pipe connector (10) according to any of claims 1 to 6, wherein the pipe connector (10) further comprises a nut (3), the nut (3) being sleeved outside the first connector (1) and being in threaded connection with the second connector (2).
8. A pipe connector (10) according to claim 7, characterized in that the nut (3) is screwed with the first protrusion (22) of the second fitting (2).
9. A pipe connector (10) according to claim 7, wherein the nut (3) is provided with a lockwire hole (33), the pipe connector (10) further comprising a fuse connecting the lockwire hole (33).
10. An aircraft engine, characterized in that it comprises a pipe connector (10) according to any one of claims 1 to 9.
CN202011400690.1A 2020-12-04 2020-12-04 Pipe connector and aeroengine Pending CN114607847A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011400690.1A CN114607847A (en) 2020-12-04 2020-12-04 Pipe connector and aeroengine

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Application Number Priority Date Filing Date Title
CN202011400690.1A CN114607847A (en) 2020-12-04 2020-12-04 Pipe connector and aeroengine

Publications (1)

Publication Number Publication Date
CN114607847A true CN114607847A (en) 2022-06-10

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JP2006183732A (en) * 2004-12-27 2006-07-13 Jfe Pipe Fitting Mfg Co Ltd Plug-in type pipe joint
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CN106362251A (en) * 2016-10-31 2017-02-01 广州爱锘德医疗器械有限公司 Rapid sleeve connection joint and injection device
CN106764177A (en) * 2017-01-16 2017-05-31 江苏宏博机械制造有限公司 Direct insertion fast connecting joint for pipe
CN206329841U (en) * 2016-12-31 2017-07-14 吴华琴 Air pump quick speed adapter
CN107504290A (en) * 2017-09-04 2017-12-22 广州枫叶管业有限公司 Pipe connecting structure
CN109027458A (en) * 2018-10-15 2018-12-18 浙江新世纪工程咨询有限公司温州分公司 Municipal drainage pipe connecting structure
CN109386674A (en) * 2017-08-08 2019-02-26 中国航发商用航空发动机有限责任公司 A kind of male connector of pipe fitting and a kind of pipe fitting
CN208719608U (en) * 2018-07-20 2019-04-09 江西艾克实业有限公司 A kind of high-pressure air pipe connector
CN211145659U (en) * 2019-12-02 2020-07-31 福建恒杰塑业新材料有限公司 Pipeline connecting structure

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29623772U1 (en) * 1996-08-30 1999-10-14 Weinhold Karl Pipe coupling
KR200255542Y1 (en) * 2001-08-30 2001-12-20 주식회사 원플라텍 a pipe joint with an insert
GB0207122D0 (en) * 2002-03-26 2002-05-08 Miller Paul Connector and hose
US20040084108A1 (en) * 2002-10-24 2004-05-06 Moeller Marine Products Sealed O-ring connector
JP2006183732A (en) * 2004-12-27 2006-07-13 Jfe Pipe Fitting Mfg Co Ltd Plug-in type pipe joint
JP2011247335A (en) * 2010-05-26 2011-12-08 Nippon Flex Kk Hose connector
CN106247043A (en) * 2016-08-25 2016-12-21 嘉兴迈思特管件制造有限公司 A kind of pipe fitting joint for sealing connecting
CN106362251A (en) * 2016-10-31 2017-02-01 广州爱锘德医疗器械有限公司 Rapid sleeve connection joint and injection device
CN206329841U (en) * 2016-12-31 2017-07-14 吴华琴 Air pump quick speed adapter
CN106764177A (en) * 2017-01-16 2017-05-31 江苏宏博机械制造有限公司 Direct insertion fast connecting joint for pipe
CN109386674A (en) * 2017-08-08 2019-02-26 中国航发商用航空发动机有限责任公司 A kind of male connector of pipe fitting and a kind of pipe fitting
CN107504290A (en) * 2017-09-04 2017-12-22 广州枫叶管业有限公司 Pipe connecting structure
CN208719608U (en) * 2018-07-20 2019-04-09 江西艾克实业有限公司 A kind of high-pressure air pipe connector
CN109027458A (en) * 2018-10-15 2018-12-18 浙江新世纪工程咨询有限公司温州分公司 Municipal drainage pipe connecting structure
CN211145659U (en) * 2019-12-02 2020-07-31 福建恒杰塑业新材料有限公司 Pipeline connecting structure

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