CN112404232A - Hydraulic expansion piston type sealing push head for pipe - Google Patents
Hydraulic expansion piston type sealing push head for pipe Download PDFInfo
- Publication number
- CN112404232A CN112404232A CN202011200163.6A CN202011200163A CN112404232A CN 112404232 A CN112404232 A CN 112404232A CN 202011200163 A CN202011200163 A CN 202011200163A CN 112404232 A CN112404232 A CN 112404232A
- Authority
- CN
- China
- Prior art keywords
- sealing
- head
- back pressure
- pressure ring
- push head
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 63
- 239000007788 liquid Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 244000208734 Pisonia aculeata Species 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/045—Closing or sealing means
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Actuator (AREA)
Abstract
The invention discloses a tubular product hydraulic expansion piston type sealing push head, which comprises a cylindrical push head piston body, wherein the head end position of the push head piston body is provided with a front groove which is distributed annularly, and a sealing ring is nested in the front groove; the annular back pressure ring is further nested in the front groove, the back pressure ring is arranged at the position of the front side of the sealing ring, and the back pressure ring and the pushing head piston body are arranged at intervals.
Description
Technical Field
The invention relates to the field of hydraulic expansion equipment, in particular to a hydraulic expansion piston type sealing push head for a pipe.
Background
The hydraulic bulging is a common method for pipe forming, the efficiency is good, the cost is relatively low, the pipe is fixed through a forming die during specific forming, the two ends of the pipe are plugged by utilizing a piston body and sealed, high-pressure liquid is injected through a liquid injection channel arranged inside the piston body to enable the pipe to be deformed into a specific shape, the sealing property between the piston body and the pipe is relatively important, the existing sealing is mostly of a sealing ring structure, good sealing is guaranteed, the piston body generally needs external equipment to apply large thrust to cling to the inner surface of the pipe as a sealing ring, the sealing ring is required to be larger than the inner diameter of the pipe, and the process of filling the piston body into the pipe in the initial stage is relatively complicated.
Disclosure of Invention
The present invention aims to overcome the above-mentioned shortcomings and provide a technical solution to solve the above-mentioned problems.
A tubular product hydraulic expansion piston type sealing push head comprises a cylindrical push head piston body, wherein a front groove which is distributed in an annular mode is formed in the head end position of the push head piston body, a sealing ring is nested in the front groove, and the head end of the push head piston body is in contact sealing when being inserted into a tubular product through the arrangement of the sealing ring in the front groove;
the front groove is also internally nested with a back pressure ring which is annularly arranged, the back pressure ring is arranged at the position of the right front side of the sealing ring, the back pressure ring and the pushing head piston body are arranged at intervals, the back pressure ring can freely move back and forth in the front groove, and the structure provides a movement basis for the back pressure ring to move back and extrude the sealing ring;
a plurality of connecting rods which extend forwards and are arranged at intervals with the pushing head piston body are integrally formed on the front surface of the back pressure ring, and the rear ends of the connecting rods are fixed on the supporting frame;
the support frame comprises a circular outer ring body, inner plates are arranged at the center of the inner side of the outer ring body at intervals, the inner plates are fixedly connected with the outer ring body through a plurality of bridging rods, the outer ring body and the back pressure ring are coaxially arranged, and the rear ends of the connecting rods are fixed on the outer ring body;
an inner groove extending backwards is formed in the center of the front surface of the sealing push head, the inner groove and the sealing push head are coaxially arranged, an air bag which is sealed and filled with certain pressure gas is filled in the inner bottom of the inner groove, a guide rod which is in a mutual sliding structure with the inner groove is arranged at the front side of the air bag, the front end of the guide rod penetrates out of the inner groove, and the front end of the guide rod is fixedly connected with the inner plate; the outer side of the guide rod is movably sleeved with a spring in a stretching shape, the spring is positioned at the outer side of the inner groove, and two ends of the spring are respectively and fixedly connected with the front surface of the sealing pushing head and the inner plate; the rear end of the guide rod is tightly propped against the air bag under the action of the pullback of the spring, and the bulging pressure of the air bag is balanced with the pullback acting force of the spring at the moment;
the outer surface of the guide rod is circumferentially provided with a plurality of guide grooves and communication grooves which are arranged in a front-back direction and alternately at intervals, the inner surface of the inner groove is provided with a slide block which protrudes inwards and is embedded with the guide grooves in a sliding manner, the guide grooves and the slide block are used for front-back guiding sliding of the guide rod, and the communication grooves are used for communicating the air bag and the inner groove with the outside.
As a further scheme of the invention: the back pressure ring is made of hard metal, and is preferably made of stainless steel.
As a further scheme of the invention: the outer diameter of the back pressure ring is smaller than the diameter of the main body of the sealing pushing head.
As a further scheme of the invention: and a liquid injection cavity channel which is arranged at intervals with the inner groove is arranged in the push head piston body and is used for connecting external hydraulic liquid injection equipment.
The invention has the beneficial effects that: according to the invention, the air bag is gradually contracted under the condition of hydraulic pressure rising, and the spring is pulled back, so that the guide rod moves backwards under the action of the spring and drives the back pressure ring to move backwards, the back pressure ring and the sealing ring are extruded to deform the sealing ring, and the outer edge position of the sealing ring is better contacted with the inner surface of the pipe, so that the whole sealing effect is improved, and the whole body is not only better in sealing effect by virtue of the mode of liquid injection internal pressure, but also more smoothly pushed in the initial sealing push head by matching with the spring pulling back structure.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
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 diagram showing the effect of the present invention.
Fig. 2 is a structural sectional view of the present invention.
Fig. 3 is a partial structural diagram of the first embodiment of the present invention.
Fig. 4 is a partial structural schematic diagram of the present invention.
In the figure: 1-sealing push head, 2-liquid injection cavity channel, 3-forming mould, 4-push head piston body, 5-front groove, 6-sealing ring, 7-back pressure ring, 8-connecting rod, 9-supporting frame, 10-guide rod, 11-spring, 12-inner groove, 13-air bag, 14-guide groove, 15-communicating groove, 16-outer ring body, 17-inner plate and 18-bridging rod.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, in an embodiment of the present invention, a tube hydraulic expansion piston type sealing push head includes a cylindrical push head piston body 4, a front groove 5 annularly distributed is formed at a head end of the push head piston body 4, a sealing ring 6 is nested in the front groove 5, and the sealing ring 6 is disposed in the front groove 5, so that the head end of the push head piston body 4 is in contact sealing when being inserted into a tube;
a back pressure ring 7 in an annular mode is further nested in the front groove 5, the back pressure ring 7 is arranged at the position of the front side of the sealing ring 6, the back pressure ring 7 and the pushing piston body 4 are arranged at intervals, the back pressure ring 7 can freely move back and forth in the front groove 5 at the moment, and the structure provides a movement basis for the back pressure ring 7 to move back and extrude the sealing ring 6;
a plurality of connecting rods 8 which extend forwards and are arranged at intervals with the pushing head piston body 4 are integrally formed on the front surface of the back pressure ring 7, and the rear ends of the connecting rods 8 are fixed on a supporting frame 9;
the supporting frame 9 comprises an annular outer ring body 16, inner plates 17 are arranged at intervals in the center of the inner side of the outer ring body 16, the inner plates 17 are fixedly connected with the outer ring body 16 through a plurality of bridging rods 18, the outer ring body 16 and the back pressure ring 7 are coaxially arranged, and the rear ends of the connecting rods 8 are fixed on the outer ring body 16;
an inner groove 12 extending backwards is formed in the center of the front surface of the sealing push head 1, the inner groove 12 and the sealing push head 1 are coaxially arranged, an air bag 13 which is sealed and filled with certain pressure gas is filled in the inner bottom of the inner groove 12, a guide rod 10 which is in a mutual sliding structure with the inner groove 12 is arranged at the front side of the air bag 13, the front end of the guide rod 10 penetrates out of the inner groove 12, and the front end of the guide rod 10 is fixedly connected with an inner plate 17; the outer side position of the guide rod 10 is movably sleeved with a spring 11 in a stretching shape, the spring 11 is positioned at the outer side position of the inner groove 12, and two ends of the spring 11 are respectively and fixedly connected with the front surface of the sealing pushing head 1 and an inner plate 17; the rear end of the guide rod 10 is tightly propped against the air bag 13 under the action of the pullback of the spring 11, and the bulging pressure of the air bag 13 is balanced with the pullback acting force of the spring 11;
the outer surface of the guide rod 10 is circumferentially provided with a plurality of guide grooves 14 and communicating grooves 15 which are arranged in a front-back direction and are alternately arranged at intervals, the inner surface of the inner groove 12 is provided with slide blocks which are protruded inwards and are embedded with the guide grooves 14 in a sliding manner, the guide grooves 14 and the slide blocks are used for the front-back guiding sliding of the guide rod 10, the communicating grooves 15 are used for communicating the air bag 13 with the inner groove 12 and the outside, in the practical use, two sealing push heads 1 are plugged into two ends of a pipe to be formed, at the moment, the sealing push heads 1 and the pipe to be formed are fixed by using a forming die 3, high-pressure liquid is injected into the pipe by using the sealing push heads 1 with liquid injection cavities 2, the forming is realized under the hydraulic state, meanwhile, the hydraulic pressure inside the pipe is gradually increased and is larger than the internal pressure of the air bag 13, the air bag 13 is gradually contracted, meanwhile, the spring 11 is pulled back, so, the back pressure ring 7 and the sealing washer 6 and the extrusion make the sealing washer 6 deform to let the outer contact tubular product internal surface that follows the position better of sealing washer 6, thereby improve holistic sealed effect, wholly with the help of the interior form of pressure of liquid injection, cooperation spring pullback structure makes wholly not only have better sealed effect, and the sealed pushing head 1's of initial stage push away more smoothly.
The back pressure ring 7 is made of hard metal, and the back pressure ring 7 is preferably made of stainless steel.
The outer diameter of the back pressure ring 7 is smaller than the diameter of the main body of the sealing push head 1.
The working principle of the invention is as follows: in practical use, the two sealed push heads 1 are plugged into two ends of a pipe to be formed, the sealed push heads 1 and the pipe to be formed are fixed by the forming die 3, high-pressure liquid is injected into the pipe by the sealed push heads 1 with the liquid injection cavity 2, forming is realized under a hydraulic state, meanwhile, the hydraulic pressure in the pipe is gradually increased and is greater than the internal air pressure of the air bag 13, the air bag 13 is gradually contracted, the spring 11 is pulled back, so that the guide rod 10 moves back and drives the back pressure ring 7 to move back under the action of the spring 11, the back pressure ring 7 and the sealing ring 6 are extruded to deform the sealing ring 6, the outer edge position of the sealing ring 6 is enabled to be in better contact with the inner surface of the pipe, the whole sealing effect is improved, the whole body is matched with a spring pull-back structure by virtue of the liquid injection internal pressure form, and the whole body has a better sealing effect, and the pushing-in of the initial sealing pushing head 1 is smoother.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (5)
1. A tubular product hydraulic expansion piston type sealing push head comprises a cylindrical push head piston body, wherein front grooves distributed in an annular mode are formed in the head end position of the push head piston body, and sealing rings are arranged in the front grooves in an embedded mode;
the push head device is characterized in that a back pressure ring in an annular mode is further nested in the front groove, the back pressure ring is arranged at the position of the front side of the sealing ring, and the back pressure ring and the push head piston body are arranged at intervals;
a plurality of connecting rods which extend forwards and are arranged at intervals with the pushing head piston body are integrally formed on the front surface of the back pressure ring, and the rear ends of the connecting rods are fixed on the supporting frame;
the support frame comprises a circular outer ring body, inner plates are arranged at the center of the inner side of the outer ring body at intervals, the inner plates are fixedly connected with the outer ring body through a plurality of bridging rods, and the rear ends of the connecting rods are fixed on the outer ring body;
an inner groove extending backwards is formed in the center of the front surface of the sealing push head, the inner groove and the sealing push head are coaxially arranged, an air bag which is sealed and filled with certain pressure gas is filled in the inner bottom of the inner groove, a guide rod which is in a mutual sliding structure with the inner groove is arranged at the front side of the air bag, the front end of the guide rod penetrates out of the inner groove, and the front end of the guide rod is fixedly connected with the inner plate; the outer side of the guide rod is movably sleeved with a spring in a stretching shape, the spring is positioned at the outer side of the inner groove, and two ends of the spring are respectively and fixedly connected with the front surface of the sealing pushing head and the inner plate; the rear end of the guide rod is tightly propped against the air bag under the action of the pullback of the spring;
the outer surface of the guide rod is circumferentially provided with a plurality of guide grooves and communicating grooves which are arranged in a front-back direction and alternately at intervals, and the inner surface of the inner groove is provided with a sliding block which protrudes inwards and is embedded with the guide grooves in a sliding manner.
2. The tubular product hydraulic expansion piston type sealing pusher head of claim 1, characterized in that the back pressure ring is made of hard metal.
3. The tubular hydraulic expansion piston type sealing pusher head of claim 1, wherein the outer diameter of the back pressure ring is smaller than the main body diameter of the sealing pusher head.
4. The tubular product hydraulic expansion piston type sealing pusher head of claim 1, characterized in that a liquid injection cavity channel is arranged in the pusher head piston body and is separated from the inner groove.
5. The tubular product hydraulic expansion piston type sealing pusher head according to claim 1, characterized in that the outer ring body and the back pressure ring are coaxially arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011200163.6A CN112404232B (en) | 2020-11-02 | 2020-11-02 | Hydraulic expansion piston type sealing push head for pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011200163.6A CN112404232B (en) | 2020-11-02 | 2020-11-02 | Hydraulic expansion piston type sealing push head for pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112404232A true CN112404232A (en) | 2021-02-26 |
| CN112404232B CN112404232B (en) | 2023-01-06 |
Family
ID=74827866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011200163.6A Active CN112404232B (en) | 2020-11-02 | 2020-11-02 | Hydraulic expansion piston type sealing push head for pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112404232B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1071433A (en) * | 1996-08-30 | 1998-03-17 | Calsonic Corp | Nozzle for vacuum formation |
| CN1651163A (en) * | 2005-02-04 | 2005-08-10 | 华东理工大学 | Hydraulic shaping device of stainless steel lined compound pipe and its shaping method |
| CN102107240A (en) * | 2009-12-25 | 2011-06-29 | 中国科学院金属研究所 | Simple tube hydro-bulging device and bulging method |
| CN110935779A (en) * | 2019-12-13 | 2020-03-31 | 哈尔滨工大海卓智能成形科技有限公司 | Pipe liquid-filling multidirectional extrusion forming device and method |
| CN211101003U (en) * | 2019-08-05 | 2020-07-28 | 深圳市建福科技有限公司 | Stamping device is used in cell phone case processing convenient to location is fixed |
-
2020
- 2020-11-02 CN CN202011200163.6A patent/CN112404232B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1071433A (en) * | 1996-08-30 | 1998-03-17 | Calsonic Corp | Nozzle for vacuum formation |
| CN1651163A (en) * | 2005-02-04 | 2005-08-10 | 华东理工大学 | Hydraulic shaping device of stainless steel lined compound pipe and its shaping method |
| CN102107240A (en) * | 2009-12-25 | 2011-06-29 | 中国科学院金属研究所 | Simple tube hydro-bulging device and bulging method |
| CN211101003U (en) * | 2019-08-05 | 2020-07-28 | 深圳市建福科技有限公司 | Stamping device is used in cell phone case processing convenient to location is fixed |
| CN110935779A (en) * | 2019-12-13 | 2020-03-31 | 哈尔滨工大海卓智能成形科技有限公司 | Pipe liquid-filling multidirectional extrusion forming device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112404232B (en) | 2023-01-06 |
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Effective date of registration: 20240516 Address after: No. 27, Group 6, Hougong Village (Zhangjiatun), Wenxiang Town, Haicheng City, Anshan City, Liaoning Province, 114232 Patentee after: Han Xiaohan Country or region after: China Address before: 523808 room 713, building 2, No.16, Keji 4th Road, Songshanhu Park, Dongguan City, Guangdong Province Patentee before: DONGGUAN ZHONGFAN NEW MATERIAL TECHNOLOGY Co.,Ltd. Country or region before: China |