CN113530953A - Permanent anti-loosening hydraulic pipe connector, mounting method and tool - Google Patents

Permanent anti-loosening hydraulic pipe connector, mounting method and tool Download PDF

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Publication number
CN113530953A
CN113530953A CN202010312687.8A CN202010312687A CN113530953A CN 113530953 A CN113530953 A CN 113530953A CN 202010312687 A CN202010312687 A CN 202010312687A CN 113530953 A CN113530953 A CN 113530953A
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CN
China
Prior art keywords
hydraulic pipe
tool
joint
pipe connector
fastener
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Granted
Application number
CN202010312687.8A
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Chinese (zh)
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CN113530953B (en
Inventor
牛国贤
苏晓岩
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Beijing Machinery Equipment Research Institute
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Beijing Machinery Equipment Research Institute
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Priority to CN202010312687.8A priority Critical patent/CN113530953B/en
Publication of CN113530953A publication Critical patent/CN113530953A/en
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Publication of CN113530953B publication Critical patent/CN113530953B/en
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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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/16—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars
    • F16L13/161—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars the pipe or collar being deformed by crimping or rolling
    • F16L13/163—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars the pipe or collar being deformed by crimping or rolling one collar being bent over the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/04—Locking of screws, bolts or nuts in which the locking takes place after screwing down with a member penetrating the screw-threaded surface of at least one part, e.g. a pin, a wedge, cotter-pin, screw
    • 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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/16—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars
    • F16L13/168—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars for screw threaded pipes
    • 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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L2013/145—Tools specially adapted therefor

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints Allowing Movement (AREA)

Abstract

The invention discloses a permanent anti-loosening hydraulic pipe connector, an installation method and a tool, belongs to the technical field of hydraulic pipe loosening prevention, and solves the problem that an existing hydraulic pipe connector is easy to loosen. The invention relates to a permanent anti-loosening hydraulic pipe connector which comprises a first fastener, a second fastener, a pin and a joint; two ends of the joint are respectively in threaded connection with one end of the first fastening piece and one end of the second fastening piece; one or more pin holes are formed in connecting sections of the first fastener, the second fastener and the joint in threaded connection, pins are inserted into the pin holes, and the pins are extruded and deformed under the action of external force to damage threads on the joint so as to lock the hydraulic pipe connecting piece. The anti-loosening hydraulic pipe connector meets the anti-loosening requirement of the hydraulic pipe connector.

Description

Permanent anti-loosening hydraulic pipe connector, mounting method and tool
Technical Field
The invention belongs to the technical field of looseness prevention of hydraulic pipes, and particularly relates to a permanent looseness prevention hydraulic pipe connector, an installation method and a tool.
Background
The hydraulic pipe connecting piece is a basic component of the hydraulic system and mainly used for connecting elements and pipelines of the hydraulic system, and the pipelines. The main problem that exists in the use of the conventional through joint nut that is applied to hydraulic system at present is that it is not hard up, and through joint nut after the correct installation is after system uses a period, the nut appears becoming flexible under the combined action such as hydraulic pressure fluctuation, equipment self vibrations, and then arouses the not hard up of hydraulic line. When the hydraulic system works, the vibration of elements and pipelines is large, and the pipe connector is easy to loosen under the vibration effect, so that leakage is caused.
In the prior art, two schemes are adopted for looseness prevention: firstly, a rated torque installation mode is adopted to ensure that the hydraulic system is installed in place and is anti-loose, and the scheme does not need special anti-loose measures and is widely used, but the problem of nut loosening in the use process still exists, so that the safety and the reliability of the hydraulic system are reduced; secondly, the problem that the surplus of thread compound is easily introduced into a hydraulic system is solved by adopting the scheme that the thread compound is smeared on the internal thread of the nut and simultaneously the mode of rated torque is adopted to ensure that the nut is installed in place and loosened.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a permanent anti-loosening hydraulic pipe connector, a mounting method and a tool, which are used for solving the problem that the existing hydraulic pipe connector is easy to loosen.
The purpose of the invention is mainly realized by the following technical scheme:
the invention discloses a permanent anti-loosening hydraulic pipe connector which comprises a first fastener, a second fastener, a pin and a joint, wherein the first fastener is fixed on the first fastener;
two ends of the joint are respectively in threaded connection with one end of the first fastening piece and one end of the second fastening piece; one or more pin holes are formed in connecting sections of the first fastener, the second fastener and the joint in threaded connection, pins are inserted into the pin holes, and the pins are extruded and deformed under the action of external force to damage threads on the joint so as to lock the hydraulic pipe connecting piece.
In one possible design, the first fastener is externally in the shape of a regular prism and internally in a circular groove provided with internal threads;
one or more side walls of the regular prism shape are provided with pin holes for placing pins, the bottom of the circular groove is provided with a through hole for a pipeline to pass through, the diameter of the through hole is smaller than that of the circular groove, and the bottom of the circular groove forms a circular ring.
In one possible design, the internal thread of the circular groove is machined after the pin is inserted into the pin hole, and a part of the thread is formed on the end face of the pin insertion end.
In one possible design, after the pipeline passes through the through hole, one end of the pipeline passing through the through hole is extruded to form a conical ring, and the bottom surface of the conical ring is arranged at one end close to the inner bottom surface of the circular groove; the diameter of the through hole is smaller than that of the bottom surface of the conical ring, and the circular ring is used for clamping the conical ring of the pipeline.
In a possible design, the length of the connecting section of the threaded connection of the first fastener and the joint is smaller than the depth of the circular groove, after the first fastener is matched with the joint, a gap is reserved between the inner bottom surface of the circular groove and the outer end surface of the joint, the inner end surfaces at two ends of the joint are respectively provided with a conical surface matched with the gradient of the conical ring, and the large-diameter end of the conical surface is located on the outer end surface of the joint.
In one possible design, the first fastener is identical in construction to the second fastener.
The invention also discloses an installation tool of the hydraulic pipe connecting piece, which is used for installing the permanent anti-loosening hydraulic pipe connecting piece and comprises a tool body, a piston and an end straight joint;
the tool body is provided with a tool groove for placing a hydraulic pipe connector, the side wall of the tool groove is provided with a stepped hole, and the position of the stepped hole corresponds to the position of a pin after the hydraulic pipe connector is placed in the tool groove; the piston is installed in the stepped hole, and the end straight joint is connected with the end part of the stepped hole.
In one possible design, openings for placing pipelines are arranged at two ends of the tool groove, the opening width h1 is smaller than the width of the bottom surface of the regular prism, the axial movement of the tool is limited, the stepped hole and the pin are quickly centered, and the hydraulic pipe connector enters and exits from the upper part of the tool groove.
In one possible design, one end of the tool groove is provided with an opening for placing a pipeline, and the width h1 of the opening is smaller than the width of the bottom surface of the regular prism shape, so that the axial movement of the tool is limited, and the stepped hole and the pin are quickly centered; the other end of the tool groove is open, and the hydraulic pipe connector enters and exits from the upper part or one end of the tool groove.
The invention also discloses a permanent anti-loose mounting method of the hydraulic pipe connector, which adopts the mounting tool of the hydraulic pipe connector and comprises the following steps:
step 1, assembling the hydraulic pipe connector and screwing the hydraulic pipe connector to a designed torque.
And 2, putting the hydraulic pipe connector into the tool to perform anti-loose locking.
Compared with the prior art, the invention can at least realize one of the following technical effects:
1) the hydraulic pipe connector disclosed by the invention adopts the pin to destroy the threads to lock the fastener, so that the permanent anti-loosening of the hydraulic pipe connector is realized. The invention avoids the use of open fire operation in the locking procedure of the hydraulic pipe connector, and improves the safety and the operation efficiency.
The thread of the circular groove of the hydraulic pipe connector is processed after the pin is embedded, and a part of the thread is formed on the pin. Avoids the fluffing and the stabbing at the through hole and improves the assembly of the fastener and the joint. The hydraulic pipe connector can be used for various connectors such as straight connectors, elbows, tee joints and the like, and has wide application range.
2) The tool is designed aiming at the permanent anti-loosening hydraulic pipe connector, the hydraulic oil extrusion piston is adopted to apply pressure to the pin, the hydraulic oil extrusion pressure is constant, and compared with the unstable machining quality caused by punching, the tool ensures the consistency of anti-loosening treatment process, avoids open fire operation on a construction site, and improves the safety performance of construction. The tool is designed according to the hydraulic pipe connector, the pin and the stepped hole are automatically centered after the hydraulic pipe connector is placed into the tool, the operation time is reduced, the operation efficiency and quality are improved, and the tool has good rapidness, consistency and stability. The pin forms obvious indentation after extrusion, so that the installation is convenient to check, and the locking program is prevented from being omitted.
3) The two ends of the joint are provided with conical surfaces matched with the conical rings, the self-centering property of the conical surfaces is good, and the pipeline is easy to center after being inserted into the joint. The angle alpha of the conical ring is 20-40 degrees, and a sealing effect can be generated on the pipeline.
4) Wherein one end of the tool groove is arranged in an open mode, so that the hydraulic pipe connecting piece can enter and exit the tool groove from the upper part of the tool body and can slide in and out from one end of the tool groove, and the tool groove is suitable for the narrow condition of space.
5) The tool is short in length, the tool groove is used for placing one fastener at a time, the tool can be suitable for locking various hydraulic pipe connecting pieces such as a straight joint, an elbow and a tee joint, and after the fastener is placed in the tool groove, the other end of the tool groove, which is open, exceeds the fastener in the tool groove but does not exceed the joint.
6) The length adjusting device that the frock body set up can make the frock adjust according to the size of different fasteners.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic structural view of a hydraulic pipe joint according to embodiment 1;
FIG. 2 is a schematic view of a first fastener structure of embodiment 1;
FIG. 3 is a schematic view of the tool of example 2;
FIG. 4 is a schematic view of the structure of the tool of embodiment 2;
FIG. 5 is a schematic view of the structure of the tool in embodiment 3 (the length adjusting device is not shown);
FIG. 6 is a schematic view showing the installation of the length adjustment device of embodiment 3;
fig. 7 is a schematic structural view of a length adjustment device according to embodiment 3.
Reference numerals:
1-a pipeline; 21-a first fastener; 22-a second fastener; 3-a linker; 4-pin; 5-a tool body; 51-a tooling groove; 511-a first U-shaped groove; 512-a second U-shaped groove; 52-opening; 6-a piston; 7-end straight-through joint; 8-a circular ring; 9-a body part; 10 length adjustment means; 101-an adjusting plate; 102-kidney shaped hole; 103-a fastening screw; 11-a stepped hole; 12-conical ring.
Detailed Description
A permanent anti-loosening hydraulic pipe coupling, a method and a tool for installation are described in further detail below with reference to specific examples, which are provided for purposes of comparison and explanation only and to which the present invention is not limited.
The invention discloses a permanent anti-loose hydraulic pipe connector, which comprises a fastener, a pin 4 and a connector 3; the joint 3 is used for connecting elements of a hydraulic system with pipelines or pipelines with pipelines, more than 2 fasteners are arranged, and the fasteners are connected with the joint 3 through threads to fix the pipelines or the elements; one or more pins 4 are provided on the fastener, the pins 4 being used to break the thread on the joint 3 and permanently lock the hydraulic pipe joint. The invention adopts the pin 4 to destroy the thread to lock the fastener, thereby avoiding the hydraulic pipe connecting piece from using open fire operation in the locking procedure and improving the safety and the operation efficiency.
The fastener exterior is a regular prism, illustratively a regular hexagonal prism. The inner part is a circular groove provided with threads; one or more side walls of the regular prism shape are provided with pin holes for placing the pins 4, the bottom of the circular groove is provided with a through hole for a pipeline to pass through, and the diameter of the through hole is smaller than that of the circular groove.
The thread of the circular groove is machined after the pin hole is fitted into the pin 4, and a part of the thread is formed on the pin 4. If the screw is machined before the pin 4 is inserted, burrs are formed at the pin hole, which causes problems such as poor assembling property with the joint 3 and early breakage of the screw of the joint 3.
When the hydraulic pipe connector is used, the fastening piece is sleeved on the pipeline; then, extruding the end part of the pipeline passing through the fastener by using a forming machine, enabling the pipeline to bulge, forming a conical ring 12 at the end part of the pipeline, arranging the bottom surface of the conical ring 12 at one end close to the inner bottom surface of the circular groove, and enabling the bottom surface of the conical ring 12 to abut against the inner bottom surface of the circular ring of the circular groove after the conical ring is matched in place, so that the conical ring of the pipeline is clamped by the circular ring of the fastener; inserting the pipeline into the joint 3, and screwing the fastener; the pin 4 on the fastening piece is extruded and deformed under the action of external force, the thread on the surface of the joint is damaged, the fastening piece is locked, and the permanent anti-loosening of the hydraulic pipe connector is realized.
The setting of through-hole makes circular recess bottom form a ring 8, and the diameter of through-hole is less than the diameter of conical ring 12 bottom surface, and ring 8 is used for blocking conical ring 12 of pipeline, restricts the axial displacement of pipeline to fix the pipeline under the cooperation of fastener and joint 3.
The length of the connecting section of the threaded connection between the fastener and the joint 3 is smaller than the depth of the circular groove, and after the fastener is matched with the joint 3, a gap is formed between the inner bottom surface of the circular groove and the outer end surface of the joint 3. The two ends of the joint 3 are provided with conical surfaces matched with the conical rings 12, the self-centering property of the conical surfaces is good, and the pipeline is easy to center after being inserted into the joint 3. The angle alpha of the conical ring 12 is 20-40 deg., and can be 24 deg. or 37 deg. for example. The stress peak generated by the conical ring 12 in the angle range enables the conical ring 12 to be easily deformed, and a sealing effect is generated on the pipeline.
Preferably, the pin 4 is a copper pin 4, which has good copper transitivity and does not generate burrs when machining threads.
The joint 3 is a straight joint 3, an elbow, a tee joint and other pipe connectors, a pipeline or an element is inserted in the joint 3, and a plurality of fasteners are correspondingly arranged on a plurality of interfaces of the joint 3. Pipe couplings that use the same anti-loosening scheme as the present invention are within the scope of the present invention.
The invention also discloses a tool for the permanent anti-loosening hydraulic pipe connector, which comprises a tool body 5, a piston 6 and an end straight joint 7; the tool body 5 is provided with a tool groove 51 for placing a hydraulic pipe connector, a stepped hole 11 is formed in the side wall of the tool body 5, and the position of the stepped hole 11 corresponds to the position of the pin 4 after the hydraulic pipe connector is placed in the tool groove 51; the piston 6 is fitted into the stepped bore 11 and the end through connection 7 is connected to the end of the stepped bore 11, which may be threaded as an example. One stepped hole 11 corresponds to one piston 6 and the end through joint 7, and 1 or more stepped holes 11, pistons 6 and end through joints 7 may be provided.
And (4) screwing the hydraulic pipe connecting piece according to the designed torque, and then putting the hydraulic pipe connecting piece into a tool to perform anti-loosening and locking. After the hydraulic pipe connecting piece is placed into the tool groove 51, hydraulic oil is injected into one end of the piston 6 through the end through connector 7, the piston 6 is pushed out and is gradually pressurized to a set pressure, the pin 4 on the fastening piece deforms under the extrusion of the piston 6, threads are damaged, and the fastening piece is locked. Preferably, the end through joint 7 is connected to a hydraulic pump or a hydraulic pipe.
According to the tool, the hydraulic oil extrusion piston 6 is adopted to apply pressure to the pin 4, the hydraulic oil extrusion pressure is constant, and compared with the unstable machining quality caused by punching points, the consistency of the anti-loosening treatment process is ensured, open fire operation on a construction site is avoided, and the safety performance of construction is improved. The tool is designed according to the hydraulic pipe connector, the pin 4 and the stepped hole 11 are automatically centered after the hydraulic pipe connector is placed in the tool, the operation time is reduced, the operation efficiency and quality are improved, and the tool has good rapidity, consistency and stability. The pin 4 forms obvious indentation after extrusion, so that the installation is convenient to check, and the locking procedure is prevented from being omitted.
One implementation mode of the tool provided by the invention comprises the following steps: the joint of the hydraulic pipe joint is a through joint, and the first fastening member 21 and the second fastening member 22 are placed in the tool groove 51. Openings 52 for placing pipelines are arranged at two ends of the tool groove 51, the width h1 of each opening 52 is smaller than that of the bottom surface of the regular prism, the axial movement of the tool is limited, the stepped hole 11 and the pin 4 are quickly centered, and the hydraulic pipe connector enters and exits from the upper part of the tool groove 51.
Sometimes the position space that hydraulic pressure union piece was located is narrow and small, for the use of convenient frock, another kind of embodiment: an opening 52 for placing the pipeline 1 is arranged at one end of the tool groove 51, and the width h1 of the opening 52 is smaller than that of the regular prism-shaped bottom surface; the other end of the tool groove 51 is arranged in an open mode, and the hydraulic pipe connector can slide out from one end of the tool groove 51, so that the problem that a large space is needed when the hydraulic pipe connector slides out from the upper side is solved.
When the locking tool is provided with 1 piston 6, only one pin 4 is pressurized at a time, then the locking tool position is changed, and the pistons 6 are aligned one by one with the other pins 4 of the hydraulic pipe connector for pressurization. When the tool is provided with the pistons 6 at the corresponding positions of the pins 4, the pins 4 can be pressurized simultaneously, the tool transposition times are reduced, the locking operation time is shortened, and the efficiency is improved. When the pins 4 of the hydraulic pipe connector are provided with corresponding pistons 6 on the tool, one-time locking can be realized.
In another embodiment of the tool of the present invention, in order to simultaneously adapt to various hydraulic pipe connectors such as straight connectors, elbows, tees, etc., the tool body 5 is set to be shorter in length, and one fastener is placed into the tool groove 51 at a time, as shown in fig. 5. An opening 52 for placing a pipeline is arranged at one end of the tool groove 51, and the width h1 of the opening 52 is smaller than that of the regular prism-shaped bottom surface; the other end of the tool groove 51 is open, and the hydraulic pipe connector can enter and exit the tool groove 51 from the upper part of the tool body 5 and can slide in and out from one end of the tool groove 51. After the fastener is placed into the tool recess 51, the other open end of the tool recess 51 extends beyond the fastener in the tool recess 51 but not beyond the joint.
In order to adapt the tool of the present invention to fasteners of different sizes, it is preferable that the tool body 5 is provided with a length adjustment device 10.
The invention also discloses a permanent anti-loose mounting method of the hydraulic pipe connector, which comprises the following steps:
step 1, assembling the hydraulic pipe connector and screwing the hydraulic pipe connector to a designed torque.
And 2, putting the hydraulic pipe connector into the tool to perform anti-loose locking.
Specifically, the step 1 is as follows: the method comprises the steps of sleeving a first fastener and a second fastener on a corresponding first pipeline and a corresponding second pipeline, extruding the end parts of the first pipeline and the second pipeline which penetrate through the first fastener and the second fastener, enabling the pipeline to bulge to form a conical ring 12 at the end part of the pipeline, inserting the pipeline into a joint 3, enabling the bottom surface of the conical ring 12 of the pipeline to abut against the inner bottom surface of a circular ring of a circular groove, enabling the outer surface of the conical ring 12 of the pipeline to be matched with conical surfaces of inner end surfaces of two ends of the joint, and screwing the fasteners according to design torque.
The step 2 is as follows: after the hydraulic pipe connecting piece is placed into the tool groove 51, hydraulic oil is injected into one end of the piston 6 through the end through connector 7, the piston 6 is pushed out and is gradually pressurized to a set pressure, the pin 4 on the fastening piece deforms under the extrusion of the piston 6, threads are damaged, and the fastening piece is locked.
Example 1
As shown in fig. 1-2, the hydraulic pipe connector for permanent anti-loosening comprises a first fastener 21, a second fastener 22, a copper pin 4 and a joint 3, wherein the joint 3 is a through joint, and the first fastener 21 and the second fastener 22 are respectively connected with two ends of the joint 3 through threads.
The first fastening member 21 has a regular hexagonal prism shape on the outside and a circular recess provided with a thread on the inside. First fastener 21 is provided with 2 copper round pins 4, and 2 copper round pins 4 set up respectively in the pinhole of two relative lateral walls, and circular recess bottom is provided with the through-hole that is used for pipeline 1 to pass, and the diameter of through-hole is less than circular recess's diameter.
The first fastener 21 and the second fastener 22 are identical in structure.
When the hydraulic pipe connector is used, the first fastening piece 21 and the second fastening piece 22 are sleeved on the two pipelines 1 respectively; pressing the ends of two pipes 1 passing through the first fastening member 21 and the second fastening member 22, wherein the pipes 1 are raised to form a conical ring 12 at the ends of the pipes; inserting two pipes at two ends of the joint 3, and screwing a first fastening piece 21 and a second fastening piece 22; finally, the threads are damaged by the pin 4, and permanent looseness prevention of the hydraulic pipe fitting is achieved. The angle alpha of the conical ring 12 on the pipe 1 is 24 deg..
Example 2
The hydraulic pipe joint is the hydraulic pipe joint in embodiment 1.
A tool for a permanent anti-loosening hydraulic pipe connector is shown in figures 3-4 and comprises a tool body 5, a piston 6 and an end straight-through joint 7.
The tool body 5 is provided with a tool groove 51, and the first fastener 21 and the second fastener 22 are placed in the tool groove 51. The tool groove 51 consists of a first U-shaped groove 511 and a second U-shaped groove 512, the width h2 of the first U-shaped groove 511 is the same as the width of the bottom surface of the regular hexagonal prism, and the width h3 of the second U-shaped groove 512 is larger than the width h of the bottom surface of the regular hexagonal prism. A stepped hole 11 for mounting the piston 6 and the end through joint 7 is provided on the first U-shaped groove 511 at a position corresponding to the pin 4.
An opening 52 for placing the pipeline 1 is arranged close to the end part of the first U-shaped groove 511, and the width h1 of the opening 52 is smaller than that of the bottom surface of the regular hexagonal prism; the end part close to the second U-shaped groove 512 is open, and the hydraulic pipe connector can slide in and out from one end of the tool groove 51.
Example 3
The hydraulic pipe joint is the hydraulic pipe joint in embodiment 1.
A tool for a permanent anti-loose hydraulic pipe connector comprises a tool body 5, a piston 6 and an end straight joint 7. The tool body 5 is provided with a tool groove 51, and one fastener is placed into the tool groove 51 at a time, as shown in fig. 5. An opening 52 for placing the pipeline 1 is arranged at one end of the tool groove 51, and the width h1 of the opening 52 is smaller than that of the regular prism-shaped bottom surface; the other end of the tool groove 51 is open, and the hydraulic pipe connector can enter and exit the tool groove 51 from the upper part of the tool body 5 and can slide in and out from one end of the tool groove 51. After the fastener is placed in the tool groove 51, the other end of the tool groove 51, which is open, exceeds the fastener in the tool groove 51 but does not exceed the joint 3.
The tool is also provided with a length adjusting device 10, so that the locking tool can be adjusted according to the size of the fastener. In this embodiment, the tool body 5 is formed by splicing a plurality of independent body parts 9 through the length adjusting device 10, the shape of the tool groove 51 is matched with the shape of an external regular hexagonal prism of the fastener, and the length adjusting device 10 is shown in fig. 6 and 7. The length adjusting device 10 includes an adjusting plate 101 and a fastening screw 103, wherein the adjusting plate 101 is provided with a waist-shaped hole 102, and the fastening screw 103 slides in the waist-shaped hole 102 according to the size of the fastening member and drives the body member 9 to move, thereby finally fixing the body member 9 at a set position.
In order to prevent the regulating plate 101 from interfering with the end through-joint 7 during the size adjustment of the tool body 5, the axis of the regulating plate 101 is disposed on a different straight line from the stepped hole 11 for mounting the piston 6 and the end through-joint 7.
In order to adjust the distance between the stepped hole 11 and the end of the tool recess 51 where the opening 52 is provided, a length adjustment device 10 is also provided on the tool body 5 in a direction parallel to the fastener axial direction.
Example 4
A mounting method of a permanent anti-loosening hydraulic pipe connector is characterized in that the hydraulic pipe connector is in the structure of an embodiment 1, and a locking tool is in the structure of an embodiment 2. The installation method of the permanent anti-loosening hydraulic pipe joint comprises the following steps:
step 1, respectively sleeving a first fastening piece 21 and a second fastening piece 22 on two pipelines 1; pressing the ends of two pipes 1 passing through the first fastening member 21 and the second fastening member 22, wherein the pipes 1 are raised to form a conical ring 12 at the end of the pipes 1; two pipelines 1 are respectively inserted at two ends of a joint 3, the bottom surfaces of conical rings 12 of the pipelines abut against the inner bottom surfaces of circular rings of circular grooves, the outer surfaces of the conical rings 12 of the pipelines are matched with the conical surfaces of the inner end surfaces at the two ends of the joint, and a first fastener 21 and a second fastener 22 are screwed.
And 2, putting the hydraulic pipe connector into the locking tool, wherein the first fastening piece 21 is arranged in the first U-shaped groove 511, and the piston 6 corresponds to one pin 4 on the first fastening piece 21. Hydraulic oil is injected into one end of the piston 6 through the end through joint 7, the piston 6 is pushed out and is gradually pressurized to a set pressure, and the pin 4 on the first fastening piece 21 is deformed under the extrusion of the piston 6 to break the thread.
And 3, taking down the locking tool, changing the direction of the locking tool, then putting the hydraulic pipe connector into the locking tool again, and pressurizing and modifying the other pin 4 by the piston 6.
And 4, repeating the step 3 until all four pins 4 on the hydraulic pipe joint are subjected to pressure deformation, and locking the first fastening piece 21 and the second fastening piece 22.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims (10)

1. A permanent anti-loosening hydraulic pipe connector, which is characterized by comprising a first fastener, a second fastener, a pin and a joint;
two ends of the joint are respectively in threaded connection with one end of the first fastening piece and one end of the second fastening piece; one or more pin holes are formed in connecting sections of the first fastener, the second fastener and the joint in threaded connection, pins are inserted into the pin holes, and the pins are extruded and deformed under the action of external force to damage threads on the joint so as to lock the hydraulic pipe connecting piece.
2. The hydraulic pipe joint according to claim 1, wherein the first fastening member is externally regular prism-shaped and internally circular groove provided with internal thread;
one or more side walls of the regular prism shape are provided with pin holes for placing the pins, the bottom of the circular groove is provided with a through hole for a pipeline to pass through, the diameter of the through hole is smaller than that of the circular groove, and the bottom of the circular groove forms a circular ring.
3. The hydraulic pipe joint according to claim 2, wherein the internal thread of the circular groove is processed after the pin is inserted into the pin hole, and a part of the thread is formed on the end surface of the pin insertion end.
4. The hydraulic pipe coupling for preventing permanent looseness according to claim 2, wherein after the pipe is passed through the through hole, one end of the pipe passed through the through hole is pressed to form a tapered ring, and a bottom surface of the tapered ring is disposed at one end close to an inner bottom surface of the circular groove; the diameter of the through hole is smaller than that of the bottom surface of the conical ring, and the circular ring is used for clamping the conical ring of the pipeline.
5. The hydraulic pipe joint according to claim 4, wherein the length of the connection section of the first fastening member in threaded connection with the joint is smaller than the depth of the circular groove, after the first fastening member is fitted with the joint, a gap is formed between the inner bottom surface of the circular groove and the outer end surface of the joint, the inner end surfaces of both ends of the joint are provided with tapered surfaces matched with the slopes of the tapered rings, and the large diameter ends of the tapered surfaces are located on the outer end surface of the joint.
6. The permanently anti-loosening hydraulic pipe fitting of claims 1-5 wherein the first fastener is identical in construction to the second fastener.
7. A mounting tool for a hydraulic pipe connector, which is used for mounting the permanent anti-loosening hydraulic pipe connector as claimed in any one of claims 1 to 6, and is characterized by comprising a tool body, a piston and an end through joint;
the tool body is provided with a tool groove for placing a hydraulic pipe connector, a stepped hole is formed in the side wall of the tool groove, and the position of the stepped hole corresponds to the position of a pin after the hydraulic pipe connector is placed in the tool groove; the piston is installed in the stepped hole, and the end straight joint is connected with the end part of the stepped hole.
8. The installation tool for the hydraulic pipe joint part according to claim 7, wherein openings for placing a pipeline are arranged at two ends of the tool groove, the width h1 of each opening is smaller than the width of the bottom surface of the regular prism, the width h1 of each opening is used for limiting axial movement of the tool so that the stepped hole and the pin can be quickly centered, and the hydraulic pipe joint part enters and exits from the upper part of the tool groove.
9. The installation tool for the hydraulic pipe joint part according to claim 7, wherein an opening for placing a pipeline is formed in one end of the tool groove, the width h1 of the opening is smaller than the width of the bottom surface of the regular prism shape, and the opening is used for limiting axial movement of the tool and enabling the stepped hole to be quickly centered with the pin; the other end of the tool groove is open, and the hydraulic pipe connector enters and exits from the upper part or one end of the tool groove.
10. A method for installing a permanent anti-loosening hydraulic pipe joint member by using the installation tool for the hydraulic pipe joint member according to any one of claims 7 to 9, comprising the steps of:
step 1, assembling the hydraulic pipe connector and screwing the hydraulic pipe connector to a designed torque.
And 2, putting the hydraulic pipe connector into the tool to perform anti-loose locking.
CN202010312687.8A 2020-04-20 2020-04-20 Permanent anti-loosening hydraulic pipe connector, mounting method and tool Active CN113530953B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1386997A (en) * 2001-05-22 2002-12-25 沃斯液体责任有限及两合公司 Threaded connector of pipeline
CN102808837A (en) * 2012-08-21 2012-12-05 杨宇 Never-dropping nut
CN203068018U (en) * 2012-12-03 2013-07-17 上海工程技术大学 Rapid sealing connector device of broken pipe
CN203614560U (en) * 2013-12-10 2014-05-28 中国航空工业第六一八研究所 Anti-loosing structure for threaded connection
CN105972035A (en) * 2016-06-21 2016-09-28 詹桥生 Nut used in cooperation with dual-loosening-prevention bolt
JP2017039191A (en) * 2015-08-20 2017-02-23 株式会社荏原製作所 Co-rotation prevention jig

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1386997A (en) * 2001-05-22 2002-12-25 沃斯液体责任有限及两合公司 Threaded connector of pipeline
CN102808837A (en) * 2012-08-21 2012-12-05 杨宇 Never-dropping nut
CN203068018U (en) * 2012-12-03 2013-07-17 上海工程技术大学 Rapid sealing connector device of broken pipe
CN203614560U (en) * 2013-12-10 2014-05-28 中国航空工业第六一八研究所 Anti-loosing structure for threaded connection
JP2017039191A (en) * 2015-08-20 2017-02-23 株式会社荏原製作所 Co-rotation prevention jig
CN105972035A (en) * 2016-06-21 2016-09-28 詹桥生 Nut used in cooperation with dual-loosening-prevention bolt

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