CN107654721A - A kind of switching tools for gas cylinder cylinder valve - Google Patents
A kind of switching tools for gas cylinder cylinder valve Download PDFInfo
- Publication number
- CN107654721A CN107654721A CN201710752613.4A CN201710752613A CN107654721A CN 107654721 A CN107654721 A CN 107654721A CN 201710752613 A CN201710752613 A CN 201710752613A CN 107654721 A CN107654721 A CN 107654721A
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- support arm
- gas cylinder
- rack
- cylinder valve
- jaw
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- 230000007246 mechanism Effects 0.000 claims description 10
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 7
- 230000033228 biological regulation Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a kind of switching tools for gas cylinder cylinder valve, it is related to power industry special-purpose machinery technical field of tools.The switching tools for gas cylinder cylinder valve, including wishbone, handwheel, threaded adjustment knob and movable jaw with rack, the buckle structure of triangular shape is formed by the first fixed jaw on wishbone, the second fixed jaw and movable jaw, the cylinder valve of the buckle structure and gas cylinder coordinates, and opening or closing for gas cylinder cylinder valve is realized by rotation hand wheel；The threaded adjustment knob is intermeshed with the movable jaw with rack by screw thread and rack, spacing between the movable jaw with rack and the first fixed jaw and the second fixed jaw can be adjusted by rotating threaded adjustment knob, to adapt to various sizes of gas cylinder cylinder valve, application is wider；The present invention is simple in construction, and easy to carry, cost is low, has very strong practical value.
Description
Technical field
The invention belongs to power industry special-purpose machinery technical field of tools, more particularly to it is a kind of for gas cylinder cylinder valve
Switching tools.
Background technology
Currently, power industry application SF6 electrical equipments are more and more, are mainly reflected in：SF6 transformers, SF6 mutual induction of voltage
Device, SF6 current transformers etc..For this kind of SF6 electrical equipments,《Electric power apparatus examination testing regulations》Middle regulation：The kind equipment
Tested before putting into operation, latter year of putting into operation is tested, and is such as tested within every 3 years without exception.Tested to the kind equipment
When test equipment is verified, it is necessary to use SF6 pure gas, and the pure gas of SF6 is contained with gas cylinder, such gas cylinder
On-off action is played by a diameter 4cm valve.Meanwhile testing crew is applied to when doing chromatography test to transformer oil
N2, and calibrating gas.Wherein, N2, calibrating gas are all to use similar gas cylinder to contain, and valve is also similar.Generally, use
Carry out the N2 of tester, the N2 for doing chromatography test requires the absolute pure of gas, and test data otherwise can be caused abnormal, can not
Judge the health status of equipment；And the purity level requirement to doing calibrating gas used in transformer oil chromatographic experiment is higher.Therefore,
Experiment or maintainer when using this kind of gas cylinder, can all use up strength and tighten, so may result in next time use when
Wait, turning on needs to spend more strength.Moreover, gas cylinder is also devised with a handle conveniently carried, adds and turn on, twist
The difficulty of tight valve.Nowadays more and more higher is required to power supply reliability, the preventive trial frequency of primary equipment is constantly increased
Greatly, the prerun of SF6 equipment, transformer oil chromatographic test frequency also and then increase, and design a portable and labour-saving gas cylinder
The switching tools of cylinder valve are particularly important.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of switching tools for gas cylinder cylinder valve.
The present invention is that solve above-mentioned technical problem by the following technical solutions：It is a kind of for gas cylinder cylinder valve
Switching tools, including wishbone, handwheel, threaded adjustment knob and the movable jaw with rack；The wishbone includes support
Arm and fixed jaw, the support arm include the first support arm and the second support arm, first support arm and the second support arm
One end is fixedly connected, and the other end forms V-arrangement opening；The fixed jaw includes the first fixed jaw and the second fixed jaw, and described first
The other end for being fixed on the first support arm of fixed jaw vertically downward, second fixed jaw vertically downward be fixed on second
The other end of brace；
The threaded adjustment knob is hubbed at the bottom of wishbone support arm, can freely rotate；The movable jaw with rack
Including movable jaw and the 3rd support arm, movable jaw one end for being arranged on the 3rd support arm fixed vertically downward, remote
3rd support arm of movable jaw side is provided with rack；The other end of 3rd support arm passes through linear steering mechanism and V-arrangement
The support arm of frame is slidably connected, and the rack on the 3rd support arm engages with the screw thread on threaded adjustment knob；
The handwheel includes handwheel body and valve rod, and the handwheel body includes handwheel inner ring, the hand on the outside of handwheel inner ring
Take turns outer ring, connect the spoke of handwheel outer ring and handwheel inner ring, multiple grooves are laid with the top edge on the outside of the handwheel outer ring；
The lower section of the handwheel inner ring is provided with core wheel, and one end of the valve rod is fixedly connected with the core wheel, the other end of the valve rod
It is fixed on the support arm of the wishbone；
When rotating threaded adjustment knob, due to screw thread and the engaging structure of rack so that the movable jaw with rack is in band
Under the driving of the adjustment knob of screw thread, along linear steering mechanism slips, so as to adjust the spacing between movable jaw and fixed jaw,
To adapt to the cylinder valve size of the gas cylinder of different size；After the spacing between movable jaw and fixed jaw is adjusted, pass through rotation
Wheel is changed hands, opens or close the cylinder valve of gas cylinder, reduces the difficulty of switch high-pressure gas cylinder valve.
Further, the linear steering mechanism includes support bar, sliding block and chute；Described support bar one end is fixed on
On the support arm of wishbone, the other end is fixedly connected with a slide block, and the chute is opened on the 3rd support arm with rack homonymy,
Sliding block is set to be slided in chute, and rack can be intermeshed with screw thread；Band rack can not only be made by linear steering mechanism
Movable jaw slided under the driving of threaded adjustment knob relative to wishbone, and the movable jaw with rack can be risen
To supporting role；Movable jaw, the first fixed jaw and the second fixed jaw form the buckle structure of triangular shape, this buckle structure with
The cylinder valve of gas cylinder is engaged, can stablize the recess for blocking cylinder valve, so as to it is laborsaving, quickly open or close high pressure gas
The cylinder valve of bottle.
Further, one end of the support bar is fixed on the 3rd support arm with rack homonymy, the other end with it is described
Sliding block is fixedly connected, and the chute is opened on the support arm of the wishbone, sliding block is slided in chute, and rack can
It is intermeshed with screw thread.
Further, the threaded adjustment knob is set on bearing pin, and the both ends of the bearing pin pass through two supports
Post is fixedly installed on the bottom of the wishbone support arm, and the threaded adjustment knob can freely rotate around bearing pin.
Further, the wishbone is integral type structure.
Further, the medial surface of the fixed jaw and movable jaw is respectively arc, the cylinder valve edge phase with gas cylinder
Adapt to, to be preferably bonded with the edge of gas cylinder cylinder valve, increase mutual frictional force, increase lifting surface area, reduce
Switch the difficulty of cylinder valve.
Further, the angle between first support arm and the second support arm is acute angle, and the first support arm and
The equal length of two support arms；Angle is preferably 36 °, the card that the isosceles triangle buckle structure that angle is 36 ° can be more firm
The firmly cylinder valve of gas cylinder.
Further, the outer lower portion of the handwheel outer ring is provided with one layer of rubber layer；Handwheel outer ring, spoke and the handwheel
The upper center of inner ring is equipped with convex ribs.
Further, the diameter of the handwheel outer ring is preferably 8cm.
Compared with prior art, the switching tools provided by the present invention for gas cylinder cylinder valve, including wishbone, hand
Wheel, the threaded adjustment knob and movable jaw with rack, by the first fixed jaw on wishbone, the second fixed jaw and
Movable jaw forms the buckle structure of triangular shape, and the cylinder valve of the buckle structure and gas cylinder coordinates, realized by rotation hand wheel
Gas cylinder cylinder valve opens or closes；The threaded adjustment knob passes through screw thread and rack phase with the movable jaw with rack
Mutually engagement, rotating threaded adjustment knob can adjust between the movable jaw with rack and the first fixed jaw and the second fixed jaw
Spacing, to adapt to various sizes of gas cylinder cylinder valve, application is wider；The present invention is simple in construction, easy to carry,
Cost is low, has very strong practical value.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, the required accompanying drawing used in being described below to embodiment
It is briefly described, it should be apparent that, drawings in the following description are only one embodiment of the present of invention, general for this area
For logical technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of switching tools for gas cylinder cylinder valve of the invention；
Fig. 2 is the structural representation of handwheel body of the present invention；
Fig. 3 is the sectional view of handwheel body of the present invention；
Fig. 4 is that the present invention uses figure for the switching tools of gas cylinder cylinder valve；
Wherein：The support arms of 1- first, the support arms of 2- second, the fixed jaws of 3- first, the fixed jaws of 4- second, the threaded adjustment rotations of 5-
Button, 6- bearing pins, 7- support columns, 8- movable jaws, the support arms of 9- the 3rd, 10- racks, 11- handwheels outer ring, 12- spokes, 13- valve rods,
14- handwheel inner rings, 15- support bars, 16- sliding blocks, 17- gas cylinder cylinder valves, 18- ribs, 19- grooves, 20- core wheels.
Embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the present invention is clearly and completely described,
Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made,
Belong to the scope of protection of the invention.
As depicted in figs. 1 and 2, a kind of switching tools for gas cylinder cylinder valve 17 provided by the present invention, including V-arrangement
Frame, handwheel, threaded adjustment knob 5 and the movable jaw 8 with rack 10；Wishbone includes support arm and fixed jaw, support arm
Including the first support arm 1 and the second support arm 2, the first support arm 1 is fixedly connected with one end of the second support arm 2, other end shape
Forming V-shape opening；Fixed jaw includes the first fixed jaw 3 and the second fixed jaw 4, the first fixed jaw 3 vertically downward be fixed on first
The other end of support arm 1, the other end for being fixed on the second support arm 2 of the second fixed jaw 4 vertically downward；
Threaded adjustment knob 5 is hubbed at the bottom of wishbone support arm, can freely rotate；Movable jaw 8 with rack 10 includes
The support arm 9 of movable jaw 8 and the 3rd, one end for being arranged on the 3rd support arm 9 fixed vertically downward of movable jaw 8, away from activity
3rd support arm 9 of the side of jaw 8 is provided with rack 10；The other end of 3rd support arm 9 passes through linear steering mechanism and wishbone
Support arm is slidably connected, and the rack 10 on the 3rd support arm 9 engages with the screw thread on threaded adjustment knob 5；
Handwheel includes handwheel body and valve rod 13, and handwheel body includes handwheel inner ring 14, the handwheel located at the outside of handwheel inner ring 14
The spoke 12 of outer ring 11, connection handwheel outer ring 11 and handwheel inner ring 14, it is laid with the top edge in the outside of handwheel outer ring 11 multiple
Groove 19；The lower section of handwheel inner ring 14 is provided with core wheel 20, and one end of valve rod 13 is fixedly connected with core wheel 20, the other end of valve rod 13
It is fixed on the support arm of wishbone.
In use, the first fixed jaw 3, the second fixed jaw 4 and movable jaw 8 form the buckle structure of triangular shape, the card
Buckle structure blocks gas cylinder cylinder valve, and gas cylinder cylinder valve 17 is opened or closed by rotation hand wheel.
Linear steering mechanism includes support bar 15, sliding block 16 and chute；The one end of support bar 15 is fixed on the support of wishbone
On arm, the other end is fixedly connected with sliding block 16, and chute is opened in on the 3rd support arm 9 of the homonymy of rack 10, making sliding block 16 exist
Slided in chute, and rack 10 can be intermeshed with screw thread；Work with rack 10 can not only be made by linear steering mechanism
Dynamic jaw 8 is slided under the driving of threaded adjustment knob 5 relative to wishbone, and the movable jaw 8 with rack 10 can be risen
To supporting role；Movable jaw 8, the first fixed jaw 3 and the second fixed jaw 4 form the buckle structure of triangular shape, this buckle knot
Structure is engaged with the cylinder valve 17 of gas cylinder, can stablize the recess for blocking cylinder valve 17, so as to it is laborsaving, quickly play on or off
Close the cylinder valve 17 of gas cylinder.
One end of support bar 15 is fixed on and on the 3rd support arm 9 of the homonymy of rack 10, the other end and sliding block 16 are fixed connects
Connect, chute is opened on the support arm of wishbone, sliding block 16 is slided in chute, and rack 10 can be intermeshed with screw thread.
Threaded adjustment knob 5 is set on bearing pin 6, and the both ends of bearing pin 6 are fixedly installed on V by two support columns 7
The bottom of shape frame support arm, threaded adjustment knob 5 can freely rotate around bearing pin 6.
The medial surface of fixed jaw and movable jaw 8 is respectively arc, is adapted with the edge of cylinder valve 17 of gas cylinder, so as to
The edge of gas cylinder cylinder valve 17 is preferably bonded, and increases mutual frictional force, increases lifting surface area, reduces switch cylinder valve 17
Difficulty.
Angle α between first support arm 1 and the second support arm 2 is acute angle, and the first support arm 1 and the second support arm 2
Equal length；Angle α is preferably 36 °, and what angle α was that 36 ° of isosceles triangle buckle structure can be more firm blocks high pressure
The cylinder valve 17 of gas cylinder.
As shown in figure 3, the outer lower portion of handwheel outer ring 11 is provided with one layer of rubber layer；Handwheel outer ring 11, spoke 12 and handwheel
The upper center of inner ring 14 is equipped with convex ribs 18；Handwheel body provided with groove 19 and rubber layer, when rotated, hand
Handwheel outer ring 11 more firmly, increase palm and the frictional force of handwheel outer ring 11, is not easy to skid, more preferably makes power in hand；It is provided with
The handwheel body of ribs 18, integrally it is not easy to be broken curved.
The diameter of handwheel outer ring 11 is preferably 8cm.
As shown in figure 4, in use, the first fixed jaw 3, the second fixed jaw 4 and movable jaw 8 are first blocked into gas cylinder bottle
The recess of valve 17, threaded adjustment knob 5 is rotated, due to the engagement of screw thread and rack 10 so that with rack 10
Movable jaw 8, along linear steering mechanism slips, is rotated up threaded adjustment under the driving of threaded adjustment knob 5
Knob 5, then movable jaw 8 is protruding, rotates down threaded adjustment knob 5, then movable jaw 8 is inwardly retracted, so as to adjust
Spacing between movable jaw 8 and fixed jaw, to adapt to the size of cylinder valve 17 of the gas cylinder of different size；When movable jaw 8 and admittedly
Determine after the spacing between jaw adjusts, by rotation hand wheel, to open or close the cylinder valve 17 of gas cylinder, reduce switch high-pressure
The difficulty of gas cylinder valve 17.
Embodiment：
The concrete structure size of switching tools in the present invention is designed by taking a diameter of 4.5cm of gas cylinder cylinder valve 17 as an example, if the
The length of one support arm 1 and the second support arm 2 is 5cm, and angle α is preferably 30 ° -60 °, in the present embodiment, angle α=36 °；
The length of first fixed jaw 3 and the second fixed jaw 4 is 3cm, and the distance of the other end to the movable jaw 8 of the 3rd support arm 9 is
4cm, the length of movable jaw 8 is 1.5cm, 11 a diameter of 8cm of handwheel outer ring of handwheel.
Above disclosed is only the embodiment of the present invention, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, can readily occur in change or modification, all
It should be included within the scope of the present invention.
Claims (10)
- A kind of 1. switching tools for gas cylinder cylinder valve, it is characterised in that：Including wishbone, handwheel, threaded adjustment rotation Button（5）And with rack（10）Movable jaw（8）；The wishbone includes support arm and fixed jaw, and the support arm includes first Support arm（1）With the second support arm（2）, first support arm（1）With the second support arm（2）One end be fixedly connected, it is another End forms V-arrangement opening；The fixed jaw includes the first fixed jaw（3）With the second fixed jaw（4）, first fixed jaw（3）Hang down It is straight downward to be fixed on the first support arm（1）The other end, second fixed jaw（4）Vertically downward be fixed on the second support Arm（2）The other end；The threaded adjustment knob（5）The bottom of wishbone support arm is hubbed at, can freely be rotated；The band rack（10） Movable jaw（8）Including movable jaw（8）With the 3rd support arm（9）, the movable jaw（8）Fixed vertically downward is arranged on the 3rd Support arm（9）One end, away from movable jaw（8）3rd support arm of side（9）It is provided with rack（10）；3rd support Arm（9）The other end be slidably connected by the support arm of linear steering mechanism and wishbone, and the 3rd support arm（9）On rack （10）With threaded adjustment knob（5）On screw thread engagement；In use, the first fixed jaw（3）, the second fixed jaw（4）And movable jaw（8）The buckle structure of triangular shape is formed, it is described Buckle structure blocks gas cylinder cylinder valve, and gas cylinder cylinder valve is opened or closed by rotation hand wheel（17）.
- 2. it is used for the switching tools of gas cylinder cylinder valve as claimed in claim 1, it is characterised in that：The linear steering mechanism Including support bar（15）, sliding block（16）And chute；The support bar（15）One end is fixed on the support arm of wishbone, another End and sliding block（16）It is fixedly connected, the chute is opened in and rack（10）3rd support arm of homonymy（9）On, make sliding block（16） Slided in chute, and rack（10）It can be intermeshed with screw thread.
- 3. it is used for the switching tools of gas cylinder cylinder valve as claimed in claim 2, it is characterised in that：The support bar（15）'s One end is fixed on and rack（10）3rd support arm of homonymy（9）On, the other end and the sliding block（16）It is fixedly connected, the cunning Groove is opened on the support arm of the wishbone, makes sliding block（16）Slided in chute, and rack（10）Can mutually it be nibbled with screw thread Close.
- 4. it is used for the switching tools of gas cylinder cylinder valve as claimed in claim 1, it is characterised in that：The threaded adjustment Knob（5）It is set in bearing pin（6）On, the bearing pin（6）Both ends pass through two support columns（7）It is fixedly installed on the wishbone The bottom of support arm.
- 5. it is used for the switching tools of gas cylinder cylinder valve as claimed in claim 1, it is characterised in that：The wishbone is integrated Formula structure.
- 6. it is used for the switching tools of gas cylinder cylinder valve as claimed in claim 1, it is characterised in that：The fixed jaw and activity Jaw（8）Medial surface be respectively arc, be adapted with the cylinder valve edge of gas cylinder.
- 7. it is used for the switching tools of gas cylinder cylinder valve as claimed in claim 1, it is characterised in that：First support arm （1）With the second support arm（2）Between angle be acute angle, and the first support arm（1）With the second support arm（2）Equal length.
- 8. it is used for the switching tools of gas cylinder cylinder valve as claimed in claim 1, it is characterised in that：First support arm （1）With the second support arm（2）Between angle be 36 °.
- 9. it is used for the switching tools of gas cylinder cylinder valve as claimed in claim 1, it is characterised in that：The handwheel outer ring（11） Outer lower portion be provided with one layer of rubber layer；The handwheel outer ring（11）, spoke（12）With handwheel inner ring（14）Upper center it is equal Provided with convex ribs（18）.
- 10. the switching tools for gas cylinder cylinder valve as described in claim 1 or 9, it is characterised in that：The handwheel outer ring （11）A diameter of 8cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710752613.4A CN107654721B (en) | 2017-08-28 | 2017-08-28 | Switching tool for high-pressure gas cylinder valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710752613.4A CN107654721B (en) | 2017-08-28 | 2017-08-28 | Switching tool for high-pressure gas cylinder valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107654721A true CN107654721A (en) | 2018-02-02 |
| CN107654721B CN107654721B (en) | 2024-03-22 |
Family
ID=61128899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710752613.4A Active CN107654721B (en) | 2017-08-28 | 2017-08-28 | Switching tool for high-pressure gas cylinder valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107654721B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB207901A (en) * | 1922-09-13 | 1923-12-13 | Wenzel Dvorak | Improvements in pipe wrenches |
| US2599489A (en) * | 1951-09-29 | 1952-06-03 | Paul E Schmidt | Valve adjusting tool |
| FR1265374A (en) * | 1960-05-20 | 1961-06-30 | Savarin & Veuve Foinant | Improvement in adjustable wrenches for tubes |
| US4802389A (en) * | 1983-02-04 | 1989-02-07 | Shultz William E | Adjustable workpiece gripping and rotating device |
| JP2001022459A (en) * | 1999-07-02 | 2001-01-26 | Sanwa Seiki Co Ltd | Handle device of hand control valve |
| CN1575931A (en) * | 2003-07-23 | 2005-02-09 | 约翰·K·琼克斯 | A method of tightening and loosening an object |
| CN201168930Y (en) * | 2008-01-25 | 2008-12-24 | 纬泰机械(上海)有限公司 | Locking pliers and presser foot opening regulating mechanism thereof |
| JP2011127690A (en) * | 2009-12-17 | 2011-06-30 | Ube Industries Ltd | Valve opening and closing jig |
| CN104776264A (en) * | 2015-03-24 | 2015-07-15 | 西南石油大学 | Switch tool for straight shank type needle valve |
| CN204828898U (en) * | 2015-07-03 | 2015-12-02 | 华电电力科学研究院 | Dog for power plant |
| JP5869095B1 (en) * | 2014-12-15 | 2016-02-24 | 中国電力株式会社 | Valve handle operation aid |
| CN205438345U (en) * | 2016-03-24 | 2016-08-10 | 台州正鼎建设有限公司 | Spanner for multi -use architecture |
| CN205654955U (en) * | 2016-05-05 | 2016-10-19 | 徐欢 | Multi function valve door hand wheel structure |
| CN205765819U (en) * | 2015-11-26 | 2016-12-07 | 中国人民解放军军械工程学院 | Three-pawl type spanner clamping device |
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2017
- 2017-08-28 CN CN201710752613.4A patent/CN107654721B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB207901A (en) * | 1922-09-13 | 1923-12-13 | Wenzel Dvorak | Improvements in pipe wrenches |
| US2599489A (en) * | 1951-09-29 | 1952-06-03 | Paul E Schmidt | Valve adjusting tool |
| FR1265374A (en) * | 1960-05-20 | 1961-06-30 | Savarin & Veuve Foinant | Improvement in adjustable wrenches for tubes |
| US4802389A (en) * | 1983-02-04 | 1989-02-07 | Shultz William E | Adjustable workpiece gripping and rotating device |
| JP2001022459A (en) * | 1999-07-02 | 2001-01-26 | Sanwa Seiki Co Ltd | Handle device of hand control valve |
| CN1575931A (en) * | 2003-07-23 | 2005-02-09 | 约翰·K·琼克斯 | A method of tightening and loosening an object |
| CN201168930Y (en) * | 2008-01-25 | 2008-12-24 | 纬泰机械(上海)有限公司 | Locking pliers and presser foot opening regulating mechanism thereof |
| JP2011127690A (en) * | 2009-12-17 | 2011-06-30 | Ube Industries Ltd | Valve opening and closing jig |
| JP5869095B1 (en) * | 2014-12-15 | 2016-02-24 | 中国電力株式会社 | Valve handle operation aid |
| CN104776264A (en) * | 2015-03-24 | 2015-07-15 | 西南石油大学 | Switch tool for straight shank type needle valve |
| CN204828898U (en) * | 2015-07-03 | 2015-12-02 | 华电电力科学研究院 | Dog for power plant |
| CN205765819U (en) * | 2015-11-26 | 2016-12-07 | 中国人民解放军军械工程学院 | Three-pawl type spanner clamping device |
| CN205438345U (en) * | 2016-03-24 | 2016-08-10 | 台州正鼎建设有限公司 | Spanner for multi -use architecture |
| CN205654955U (en) * | 2016-05-05 | 2016-10-19 | 徐欢 | Multi function valve door hand wheel structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107654721B (en) | 2024-03-22 |
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