CN110985793A - Flaring connecting assembly for hydraulic oil pipe - Google Patents
Flaring connecting assembly for hydraulic oil pipe Download PDFInfo
- Publication number
- CN110985793A CN110985793A CN201911170703.8A CN201911170703A CN110985793A CN 110985793 A CN110985793 A CN 110985793A CN 201911170703 A CN201911170703 A CN 201911170703A CN 110985793 A CN110985793 A CN 110985793A
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- China
- Prior art keywords
- joint
- moving plate
- fixedly connected
- plate
- oil pipe
- 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
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Classifications
-
- 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
- F16L37/00—Couplings of the quick-acting type
- F16L37/24—Couplings of the quick-acting type in which the connection is made by inserting one member axially into the other and rotating it to a limited extent, e.g. with bayonet action
- F16L37/244—Couplings of the quick-acting type in which the connection is made by inserting one member axially into the other and rotating it to a limited extent, e.g. with bayonet action the coupling being co-axial with the pipe
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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
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/16—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe
- F16L3/18—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe allowing movement in axial direction
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention provides a flaring connecting assembly of a hydraulic oil pipe. Hydraulic pressure oil pipe flaring coupling assembling includes: a base; the bottom of the first moving plate is connected to the top of the base in a sliding mode, a first joint is fixedly connected to the right side of the first moving plate, one end of the first joint penetrates through the first moving plate and extends to the left side of the first moving plate, and a limiting block is fixedly connected to the outer surface of one end, extending to the left side of the first moving plate, of the first joint; the bottom of the second moving plate is connected to the top of the base in a sliding mode and located on the left side of the first moving plate, and a second joint is fixedly connected to the left side of the second moving plate. The hydraulic oil pipe flaring connecting assembly effectively prevents the phenomenon of thread slipping caused by the arrangement of threaded connection in the prior art, so that the connection is more stable and the service life is longer.
Description
Technical Field
The invention relates to the field of connecting assemblies, in particular to a hydraulic oil pipe flaring connecting assembly.
Background
The hydraulic rubber tube is also named as a hydraulic oil tube, a hydraulic hose, a high-pressure rubber tube, a hydraulic tube, a steel wire high-pressure tube and a steel wire woven rubber tube steel wire wound rubber tube, and is generally divided into a steel wire woven hydraulic rubber tube and a steel wire wound hydraulic rubber tube, is mainly used for mine hydraulic supports and oil field development, and is suitable for conveying petroleum-based (such as mineral oil, soluble oil, hydraulic oil, fuel oil and lubricating oil) and water-based liquid (such as emulsion, oil-water emulsion and water) with certain pressure and temperature in mechanized and automatic hydraulic systems of engineering construction, hoisting transportation, metallurgical forging and pressing, mining equipment, ships, injection molding machinery, agricultural machinery, various machine tools and various industrial departments and the like and liquid transmission.
At present hydraulic pressure oil pipe has two kinds with the connected form of joint usually, one kind is the welding realization, but because the welding need consume a large amount of man-hours, another kind is threaded connection, if threaded connection, long-time use can make the screw thread have smooth silk phenomenon to make subsequent connection unstable, use comparatively inconvenient.
Therefore, it is necessary to provide a hydraulic oil pipe flaring connection assembly to solve the above technical problems.
Disclosure of Invention
The invention provides a hydraulic oil pipe flaring connecting assembly, which solves the problem of thread slipping phenomenon in threaded connection.
In order to solve the technical problem, the invention provides a hydraulic oil pipe flaring connection assembly, which comprises:
a base;
the bottom of the first moving plate is connected to the top of the base in a sliding mode, a first joint is fixedly connected to the right side of the first moving plate, one end of the first joint penetrates through the first moving plate and extends to the left side of the first moving plate, and a limiting block is fixedly connected to the outer surface of one end, extending to the left side of the first moving plate, of the first joint;
the bottom of the second moving plate is connected to the top of the base in a sliding mode and located on the left side of the first moving plate, a second joint is fixedly connected to the left side of the second moving plate, one end of the second joint penetrates through the second moving plate and extends to the right side of the second moving plate, and a sliding sleeve is sleeved on the outer surface of the second joint;
the groove is arranged on the outer surface of the second joint, a first fixing plate is fixedly connected between two sides of the inner wall of the groove, a second fixing plate is fixedly connected between two sides of the inner wall of the groove and located at the bottom of the first fixing plate, and a clamping plate is slidably connected to the top of the first fixing plate.
Preferably, the bottom of chucking board runs through in proper order first fixed plate with the second fixed plate extends to the bottom of second fixed plate, the surface of chucking board just be located first fixed plate with one side fixedly connected with baffle that the second fixed plate is relative, the both sides of baffle bottom with all be provided with a expanding spring between the both sides at second fixed plate top.
Preferably, the first joint and the second joint are fixedly connected with an oil pipe connector at the side away from each other, and a sealing ring is arranged on the outer surface of the first joint and on the left side of the limiting block.
Preferably, the outer surface of the second joint is located on the left side of the groove, a sliding groove is formed in the left side of the groove, a sliding block is connected to the inner portion of the sliding groove in a sliding mode, and the top of the sliding block is fixedly connected with the inner surface of the sliding sleeve.
Preferably, the left side of the first moving plate and the bottom of the first joint are fixedly connected with a U-shaped groove.
Preferably, sliding plates are connected to the top and the bottom of the right side of the inner wall of the U-shaped groove in a sliding mode, clamping blocks are fixedly connected to one opposite sides of the two sliding plates, one opposite side of each clamping block penetrates through the U-shaped groove and extends to the outside of the U-shaped groove, and a second expansion spring is arranged between the two opposite sides of the sliding plates.
Preferably, the right side of the second movable plate is located the bottom fixedly connected with connecting block that the second connects, the notch looks adaptation in connecting block and U type groove, the draw-in groove has all been seted up to the top and the bottom of connecting block one end, draw-in groove and fixture block looks adaptation.
Compared with the related art, the hydraulic oil pipe flaring connecting component provided by the invention has the following beneficial effects:
the invention provides a hydraulic oil pipe flaring connecting assembly, which comprises a first moving plate and a second moving plate which are manually slid, wherein the first moving plate and the second moving plate respectively drive a connecting block and a U-shaped groove to move towards opposite directions;
when needs are dismantled, with the sliding sleeve move a segment distance right, at rotatory sliding sleeve, because first expanding spring's elastic force, first expanding spring drives baffle upward movement, and the baffle drives chucking board upward movement, and then extrudees the sliding sleeve to make the stopper have not had the restriction, stimulate first movable plate and second movable plate and can realize separating, prevented effectively that prior art from setting up threaded connection and leading to smooth silk phenomenon, make to connect more stably, the life-span is more lasting.
Drawings
FIG. 1 is a schematic structural view of a preferred embodiment of a hydraulic tubing flare connection assembly according to the present invention;
FIG. 2 is a side view of the second joint shown in FIG. 1;
FIG. 3 is a schematic view of the second coupling shown in FIG. 1 with the sliding sleeve removed;
fig. 4 is an internal view of the U-shaped groove shown in fig. 1.
Reference numbers in the figures: 1. the base, 2, first movable plate, 3, first joint, 4, stopper, 5, second movable plate, 6, second joint, 7, sliding sleeve, 8, recess, 9, first fixed plate, 10, second fixed plate, 11, chucking board, 12, baffle, 13, first expanding spring, 14, oil pipe interface, 15, sealing washer, 16, spout, 17, slider, 18, U type groove, 19, sliding plate, 20, fixture block, 21, second expanding spring, 22, connecting block, 23, draw-in groove.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, wherein fig. 1 is a schematic structural view of a hydraulic oil pipe flaring connection assembly according to a preferred embodiment of the present invention; FIG. 2 is a side view of the second joint shown in FIG. 1; FIG. 3 is a schematic view of the second coupling shown in FIG. 1 with the sliding sleeve removed; fig. 4 is an internal view of the U-shaped groove shown in fig. 1. Hydraulic pressure oil pipe flaring coupling assembling includes:
a base 1;
the bottom of the first moving plate 2 is slidably connected to the top of the base 1, a first joint 3 is fixedly connected to the right side of the first moving plate 2, one end of the first joint 3 penetrates through the first moving plate 2 and extends to the left side of the first moving plate 2, and a limiting block 4 is fixedly connected to the outer surface of one end of the first joint 3 extending to the left side of the first moving plate 2;
the bottom of the second moving plate 5 is slidably connected to the top of the base 1 and is located on the left side of the first moving plate 2, the left side of the second moving plate 5 is fixedly connected with a second joint 6, one end of the second joint 6 penetrates through the second moving plate 5 and extends to the right side of the second moving plate 5, and a sliding sleeve 7 is sleeved on the outer surface of the second joint 6;
a plurality of recess 8, a plurality of recess 8 is seted up in the surface of second joint 6, the first fixed plate of fixedly connected with 9 between the both sides of recess 8 inner wall, the bottom fixedly connected with second fixed plate 10 that just is located first fixed plate 9 between the both sides of recess 8 inner wall, the top sliding connection of first fixed plate 9 has chucking plate 11.
The top of chucking board 11 is the oblique type, moves right when sliding sleeve 7, just can extrude chucking board 11, drives chucking board 11 and connects 6 inside motion to the second, and inside first joint 3 inserted the second and connects 6, chucking board 11 downstream card was at the back of stopper 4, when pulling out first joint 3 and second and connect 6, because chucking board 11 is to the restriction of stopper 4 for first joint 3 and second connect 6 unable separations.
The bottom of chucking plate 11 runs through in proper order first fixed plate 9 with second fixed plate 10 and extend to the bottom of second fixed plate 10, the surface of chucking plate 11 just is located first fixed plate 9 with one side fixedly connected with baffle 12 that the second fixed plate 10 is relative, the both sides of baffle 12 bottom with all be provided with first expanding spring 13 between the both sides at second fixed plate 10 top.
The first joint 3 with the second joint 6 one side fixedly connected with oil pipe interface 14 that leaves mutually, the surface of first joint 3 just is located the left side of stopper 4 and is provided with sealing washer 15, and the setting of sealing washer 15 makes first joint 3 and second joint 6 leakproofness when connecting better.
The surface that the second connects 6 just is located spout 16 has been seted up in the left side of recess 8, the inside sliding connection of spout 16 has slider 17, slider 17 and sliding sleeve 7 fixed connection, sliding sleeve 7 drives slider 17 motion, sliding sleeve 7 moves extrusion chucking plate 11 right, first expanding spring 13 is in compression state this moment, because elastic force, first expanding spring 13 has an ascending elasticity to chucking plate 11, chucking plate 11 just can have a reaction force to sliding sleeve 7, force sliding sleeve 7 to move right, rotatory sliding sleeve 7 this moment, slider 17 slides to the opposite side in spout 16, because the transverse distance of opposite side spout 16 is less than the transverse distance of this one side, chucking plate 11 just can be stable.
The left side of the first moving plate 2 and the bottom of the first joint 3 are fixedly connected with a U-shaped groove 18.
The top and the bottom on the right side of the inner wall of the U-shaped groove 18 are both connected with sliding plates 19 in a sliding mode, one opposite side of each of the two sliding plates 19 is fixedly connected with a clamping block 20, one opposite side of each of the two clamping blocks 20 penetrates through the U-shaped groove 18 and extends to the outside of the U-shaped groove 18, a second telescopic spring 21 is arranged between the two opposite sides of the two sliding plates 19, the two sides of each clamping block 20 are arc-shaped, and the connecting blocks 22 can be conveniently inserted to reduce resistance.
The right side of the second moving plate 5 is located the bottom fixedly connected with connecting block 22 that the second connects, the top and the bottom of connecting block 22 one end have all been seted up draw-in groove 23.
The working principle of the hydraulic oil pipe flaring connecting assembly provided by the invention is as follows:
manually sliding the first moving plate 2 and the second moving plate 5, wherein the first moving plate 2 and the second moving plate 5 respectively drive the connecting block 22 and the U-shaped groove 18 to move towards opposite directions, when the connecting block 22 is clamped in the U-shaped groove 18, the first joint 3 is just in butt joint with the second joint 6, the limiting block 4 moves to the inside of the second joint 6, the sliding sleeve 7 moves rightwards to gradually extrude the clamping plate 11 by moving the sliding sleeve 7, the clamping plate 11 is driven to move downwards to clamp the limiting block 4, then the sliding sleeve 7 is rotated to enable the sliding block 17 to move to the other side of the sliding groove 16, and the sliding block 17 moves to the other side of the sliding groove 16 by a small distance leftwards, so that the first joint 3 and the second joint 6 are connected;
when the movable type sliding sleeve is required to be detached, the sliding sleeve 7 moves rightwards for a short distance, the sliding sleeve 7 rotates, due to the elastic force of the first telescopic spring 13, the first telescopic spring 13 drives the baffle plate 12 to move upwards, the baffle plate 12 drives the clamping plate 11 to move upwards, and then the sliding sleeve 7 is extruded, so that the limiting block 4 is not limited, and the first movable plate 2 and the second movable plate 5 are pulled to be separated.
Compared with the related art, the hydraulic oil pipe flaring connecting component provided by the invention has the following beneficial effects:
manually sliding the first moving plate 2 and the second moving plate 5, wherein the first moving plate 2 and the second moving plate 5 respectively drive the connecting block 22 and the U-shaped groove 18 to move towards opposite directions, when the connecting block 22 is clamped in the U-shaped groove 18, the first joint 3 is just in butt joint with the second joint 6, the limiting block 4 moves to the inside of the second joint 6, the sliding sleeve 7 moves rightwards to gradually extrude the clamping plate 11 by moving the sliding sleeve 7, the clamping plate 11 is driven to move downwards to clamp the limiting block 4, then the sliding sleeve 7 is rotated to enable the sliding block 17 to move to the other side of the sliding groove 16, and the sliding block 17 moves to the other side of the sliding groove 16 by a small distance leftwards, so that the first joint 3 and the second joint 6 are connected;
when needs are dismantled, with sliding sleeve 7 move a segment distance to the right, at rotatory sliding sleeve 7, because first expanding spring 13's elastic force, first expanding spring 13 drives baffle 12 upward movement, baffle 12 drives chucking board 11 upward movement, and then extrudes sliding sleeve 7, thereby make stopper 4 have not the restriction, the separation can be realized to the first movable plate 2 of pulling and second movable plate 5, it sets up threaded connection and leads to smooth silk phenomenon to have effectively prevented prior art, make the connection more stable, the life-span is more lasting.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. The utility model provides a hydraulic oil pipe flaring coupling assembling which characterized in that includes:
a base;
the bottom of the first moving plate is connected to the top of the base in a sliding mode, a first joint is fixedly connected to the right side of the first moving plate, one end of the first joint penetrates through the first moving plate and extends to the left side of the first moving plate, and a limiting block is fixedly connected to the outer surface of one end, extending to the left side of the first moving plate, of the first joint;
the bottom of the second moving plate is connected to the top of the base in a sliding mode and located on the left side of the first moving plate, a second joint is fixedly connected to the left side of the second moving plate, one end of the second joint penetrates through the second moving plate and extends to the right side of the second moving plate, and a sliding sleeve is sleeved on the outer surface of the second joint;
the groove is arranged on the outer surface of the second joint, a first fixing plate is fixedly connected between two sides of the inner wall of the groove, a second fixing plate is fixedly connected between two sides of the inner wall of the groove and located at the bottom of the first fixing plate, and a clamping plate is slidably connected to the top of the first fixing plate.
2. The hydraulic oil pipe flaring connection assembly of claim 1, wherein the bottom of the clamping plate sequentially penetrates through the first fixing plate and the second fixing plate and extends to the bottom of the second fixing plate, a baffle is fixedly connected to the outer surface of the clamping plate and located on the opposite side of the first fixing plate and the second fixing plate, and first expansion springs are arranged between two sides of the bottom of the baffle and two sides of the top of the second fixing plate.
3. The hydraulic oil pipe flaring connection assembly of claim 1, wherein an oil pipe interface is fixedly connected to a side where the first joint and the second joint are separated from each other, and a sealing ring is arranged on the outer surface of the first joint and on the left side of the limiting block.
4. The hydraulic oil pipe flaring connection assembly of claim 1, wherein a sliding groove is formed in the outer surface of the second joint and located on the left side of the groove, and a sliding block is slidably connected to the inside of the sliding groove.
5. The hydraulic oil pipe flaring connection assembly of claim 1, wherein a U-shaped groove is fixedly connected to the left side of said first moving plate and at the bottom of said first joint.
6. The hydraulic oil pipe flaring connection assembly of claim 5, wherein sliding plates are slidably connected to the top and the bottom of the right side of the inner wall of the U-shaped groove, clamping blocks are fixedly connected to opposite sides of the two sliding plates, opposite sides of the two clamping blocks extend through the U-shaped groove and extend to the outside of the U-shaped groove, and a second expansion spring is arranged between opposite sides of the two sliding plates.
7. The hydraulic oil pipe flaring connection assembly of claim 1, wherein a connection block is fixedly connected to the right side of the second moving plate and located at the bottom of the second joint, and clamping grooves are formed in the top and the bottom of one end of the connection block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911170703.8A CN110985793A (en) | 2019-11-26 | 2019-11-26 | Flaring connecting assembly for hydraulic oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911170703.8A CN110985793A (en) | 2019-11-26 | 2019-11-26 | Flaring connecting assembly for hydraulic oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110985793A true CN110985793A (en) | 2020-04-10 |
Family
ID=70086924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911170703.8A Pending CN110985793A (en) | 2019-11-26 | 2019-11-26 | Flaring connecting assembly for hydraulic oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110985793A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113551093A (en) * | 2021-09-17 | 2021-10-26 | 常州勇前机电科技有限公司 | Opposite-insertion quick-change gas circuit connector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1117309A (en) * | 1954-12-23 | 1956-05-22 | Cie De Pont A Mousson | Apparatus for the press-fit connection of tubular plastic elements and similar operations |
| JP2003247663A (en) * | 2002-02-22 | 2003-09-05 | Seibu Denki Kogyo Kk | Remote connecting device of pipe member |
| CH696844A5 (en) * | 2003-03-14 | 2007-12-31 | Joiners Bench Ag | Work-piece assembly unit, e.g. for holding plastic pipes during welding, comprises a fixed carrier section, a movable carrier section, a guide unit, an adapter and a drive motor |
| CN202302469U (en) * | 2011-09-28 | 2012-07-04 | 湖北新叶液压机械股份有限公司 | Self-locking quick-changing connector |
| CN103307391A (en) * | 2012-03-09 | 2013-09-18 | 珠海格力电器股份有限公司 | Quick pipe joint |
| CN205278638U (en) * | 2016-01-12 | 2016-06-01 | 国网安徽省电力公司安庆供电公司 | Hydraulic equipment crossover sub |
| CN206405957U (en) * | 2016-12-15 | 2017-08-15 | 河北联润在线工程技术有限公司 | Fast connecting device of pipelines |
| CN206643857U (en) * | 2017-04-12 | 2017-11-17 | 新兴重工湖北三六一一机械有限公司 | A kind of large caliber rubber pipe joint docking facilities |
| CN207406606U (en) * | 2017-10-24 | 2018-05-25 | 北京臻迪科技股份有限公司 | Adapter assembly and hull of paddling |
| CN207935552U (en) * | 2017-12-06 | 2018-10-02 | 陕西瀚泰水利水电勘测设计有限公司 | A kind of water pipeline for hydraulic engineering supports connection structure |
| CN209654817U (en) * | 2019-01-14 | 2019-11-19 | 锦丰科技（深圳）有限公司 | It is a kind of can fast insert-pull quick coupling structure |
-
2019
- 2019-11-26 CN CN201911170703.8A patent/CN110985793A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1117309A (en) * | 1954-12-23 | 1956-05-22 | Cie De Pont A Mousson | Apparatus for the press-fit connection of tubular plastic elements and similar operations |
| JP2003247663A (en) * | 2002-02-22 | 2003-09-05 | Seibu Denki Kogyo Kk | Remote connecting device of pipe member |
| CH696844A5 (en) * | 2003-03-14 | 2007-12-31 | Joiners Bench Ag | Work-piece assembly unit, e.g. for holding plastic pipes during welding, comprises a fixed carrier section, a movable carrier section, a guide unit, an adapter and a drive motor |
| CN202302469U (en) * | 2011-09-28 | 2012-07-04 | 湖北新叶液压机械股份有限公司 | Self-locking quick-changing connector |
| CN103307391A (en) * | 2012-03-09 | 2013-09-18 | 珠海格力电器股份有限公司 | Quick pipe joint |
| CN205278638U (en) * | 2016-01-12 | 2016-06-01 | 国网安徽省电力公司安庆供电公司 | Hydraulic equipment crossover sub |
| CN206405957U (en) * | 2016-12-15 | 2017-08-15 | 河北联润在线工程技术有限公司 | Fast connecting device of pipelines |
| CN206643857U (en) * | 2017-04-12 | 2017-11-17 | 新兴重工湖北三六一一机械有限公司 | A kind of large caliber rubber pipe joint docking facilities |
| CN207406606U (en) * | 2017-10-24 | 2018-05-25 | 北京臻迪科技股份有限公司 | Adapter assembly and hull of paddling |
| CN207935552U (en) * | 2017-12-06 | 2018-10-02 | 陕西瀚泰水利水电勘测设计有限公司 | A kind of water pipeline for hydraulic engineering supports connection structure |
| CN209654817U (en) * | 2019-01-14 | 2019-11-19 | 锦丰科技（深圳）有限公司 | It is a kind of can fast insert-pull quick coupling structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113551093A (en) * | 2021-09-17 | 2021-10-26 | 常州勇前机电科技有限公司 | Opposite-insertion quick-change gas circuit connector |
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Application publication date: 20200410 |