CN103411022A - Valve locking device - Google Patents
Valve locking device Download PDFInfo
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- CN103411022A CN103411022A CN2013103768070A CN201310376807A CN103411022A CN 103411022 A CN103411022 A CN 103411022A CN 2013103768070 A CN2013103768070 A CN 2013103768070A CN 201310376807 A CN201310376807 A CN 201310376807A CN 103411022 A CN103411022 A CN 103411022A
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- lock body
- valve
- locking closure
- driver plate
- annular groove
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Abstract
The invention discloses a valve locking device and belongs to a mechanical anti-theft mechanism in pipeline valves. The valve locking device is mainly applied to exposed ends of hidden valve rods and plays a role in preventing media in pipeline systems from being stolen due to the fact that the valve rods are switched on and off freely. The valve locking device is composed of a bonnet, a lock body, a lock cover, locking assemblies and the like. The whole locking device adopts the design structure of a coded lock, according to the code structure, when the locking device is needed to open, a plurality of locking assemblies are needed to open simultaneously, the operation of each locking assembly is achieved by rotating a code disk, special tools are not needed, and the valve locking device is convenient to operate and safe in use. Meanwhile, the connection of the whole locking device is operated through matching of lock beads, annular grooves, lock holes, magnetic blocks and the like, and valve locking device cannot be damaged easily and is reliable in use and good in anti-theft performance.
Description
Technical field
The present invention relates to the locking closure in a kind of mechanical structure, specifically refer to the valve locking closure for safety valve.
Background technique
The valve locking closure is a kind of burglar-proof mechanism be widely used in valve, and it is arranged on the top of valve usually be used to protecting valve rod, rotates and is with movable valve freely to open and close and then prevents that the pipe-line system medium is stolen by the restriction valve rod.At present, the locking closure be arranged on market on locking ball valve, locking gate valve often can not effectively play anti-theft function, this class locking closure such as disclosed China Patent No. are 201020300266.5 " a kind of locking valve ", its structural design too simply, easily suffers artificial destruction, it also needs to utilize special tool to open when Open valve, this special tool is made simple, easily be imitated or replace by other instrument, therefore can't thoroughly play anti-theft function, and the mode of operation more complicated of this locking closure, bring convenience to the users.And disclosed China Patent No. is 02211869.1 " magnetic coding lock of valve ", a kind of lock structure that its magnetic that has disclosed two magnetic patch of a kind of employing is repelled each other or inhaled and form in conjunction with flexible elastic force mutually, this locking closure reliability in actual use is not high, easily causes locking stuck.Therefore, for the existing defect of existing valve locking closure and deficiency, design good and locking closure convenient operation of a kind of survivable, theftproof performance and extremely be necessary.
Summary of the invention
Goal of the invention of the present invention be to overcome the defect of prior art and provide a kind of easy and simple to handle, survivable, use reliable, theftproof performance valve locking closure preferably.
Goal of the invention of the present invention realizes by following technical proposal:
A kind of valve locking closure, comprise the lock body that is movably connected in the valve gap top and the locking closure that is movably connected in the lock body top, described locking closure bottom is provided with the disjunctor cover to downward-extension, and this disjunctor cover inserts in lock body from the lock body top, and the valve rod exposed junction of valve is hidden in locking closure; Between described disjunctor cover and lock body, be provided with the multiple tracks interlock assembly, this multiple tracks interlock assembly is along vertically setting gradually; Described per pass interlock assembly includes the locking annular groove be arranged on disjunctor cover outer circumferential face, also comprise be arranged on lock body and a plurality of lockholes corresponding with locking annular groove position, and movable set outside lock body and the driver plate corresponding with locking annular groove position, outside driver plate, be provided with the combination disk that suit connects, the outer circumferential face of this combination disk is provided with a number of turns word; In described each lockhole, be equipped with lock ball, expose in the locking annular groove that is arranged on the disjunctor cover this lock ball the inner, and the lock ball outer end contacts on the driver plate inner ring; Described driver plate inner ring be provided with described lockhole in lock ball outer end equipped ball-type groove mutually, the upper and lower both sides of this ball-type groove are respectively equipped with magnetic patch.
Described combination disk is between driver plate outer ring and combination disk inner ring, to be respectively equipped with equipped mutually shallow slot and boss with the suit linkage structure of driver plate.
In described lock body and driver plate, be provided with the driver plate fixed hole that runs through simultaneously lock body and driver plate.
Described lock body top is provided with the nut of spacing multiple tracks interlock assembly, outside described locking closure bottom surface, is arranged with a corral limit, and this surrounding edge cover is combined in outside nut.
Between described adjacent twice interlock assembly, be provided with spacer ring separately, this spacer ring inner ring is provided with inserted block, correspondingly at the lock body outer surface, is provided with described inserted block and fixes and join slotting jack.
The upper and lower both sides of ball-type groove of described driver plate inner ring are respectively equipped with curve bath, and described magnetic patch is embedded respectively in this curve bath.
In described per pass interlock assembly, be arranged on disjunctor cover outer circumferential face the locking annular groove be arranged on a plurality of lockholes on lock body all on same level; A plurality of lockholes position on the described lock body be arranged in adjacent twice interlock assembly is to intersect and staggers.
Described lock body and movable connection structure between valve gap are to be respectively equipped with lock body annular groove corresponding to position and valve gap annular groove on lock body internal surface and valve gap outer surface, and described a plurality of steel balls are arranged in lock body annular groove and valve gap annular groove simultaneously.
Described valve gap is provided with Cock screw, and the inner of this Cock screw is stretched in the valve gap annular groove.
Beneficial effect of the present invention is: the valve locking closure has adopted the project organization of cipher lock, when this cryptography architecture need to be opened at locking closure, must untie simultaneously the multiple tracks interlock assembly, and being all rotation by combination disk, the operation of per pass interlock assembly realizes, without special tool, can use easy and simple to handle, use safety.Simultaneously, the connection of whole locking closure is by the operation that cooperatively interacts of the structures such as lock pearl, annular groove, lockhole, magnetic patch, be not subject to destructions, use reliably, theftproof performance is better.
The accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Fig. 4 is the C-C sectional view (locking states of interlock assembly) of Fig. 1.
Fig. 5 is the D place enlarged view of Fig. 4.
Fig. 6 is the C-C sectional view (released state of interlock assembly) of Fig. 1.
Fig. 7 is the sectional view of locking closure.
Fig. 8 is the sectional view of lock body.
Fig. 9 is the sectional view of driver plate.
Figure 10 is the sectional view of spacer ring.
Embodiment
Below in conjunction with above-mentioned accompanying drawing and adopt specific embodiment to be described in detail again the present invention.
As shown in Figures 1 to 10,1. valve gap, 11. valve gap annular grooves, 2. steel ball, 3. interlock assembly, 31. combination disk, 311. boss, 32. driver plates, 321. shallow slots, 322. ball-type grooves, 323. curve baths, 34. driver plate fixed holes, 35. magnetic patch, 36. numerals, 33. lock balls, 4. valve rod, 5. locking closure, 51. disjunctor covers, 511. locking annular grooves, 52. surrounding edges, 6. nut, 7. spacer ring, 71. inserted blocks, 8. lock body, 81. annular boss, 82. lock body annular grooves, 83. lockholes, 84. jacks, 9. Cock screw.
The valve locking closure, as shown in Figure 1, it belongs to the mechanical type anti-theft mechanism in a kind of pipeline valve, generally be arranged on the top of valve, also can be arranged on the valve sidepiece, its mounting point mainly arranges according to valve rod 4 exposed junction positions, purpose is in order to hide the exposed junction of valve rod 4, and play and prevent that valve rod is by the effect that freely opens and closes and cause the pipe-line system medium to be usurped, the locking closure that the present invention be take on the valve gap 1 that is arranged on valve top part is described in detail as example, the valve rod 4 of this valve protrudes upward valve gap 1 and exposes, and be blocked in device hides and to be arranged on.
Described valve locking closure is mainly to consist of parts such as lock body 8, locking closure 5 and multiple tracks interlock assemblies 3.
As shown in Figure 8, it is that the cylindrical sleeve of upper and lower perforation through hole, this cylindrical sleeve are arranged in one is again the step structure consisted of the less upper cylindrical sleeve of top outside dimension and the larger-size lower cylindrical sleeve of lower outer diameter to described lock body 8; Described through hole middle part inwall is provided with a ring shape boss 81; Insert from the bottom of lock body 8 through holes at valve gap 1 top of described valve, and it inserts limit position is to do to stop spacing by the annular boss 81 in lock body 8.Simultaneously, at the internal surface of lock body 8, be provided with the lock body annular groove 82 of a circle cross section semicircular in shape, corresponding outer surface at valve gap 1 also is provided with the valve gap annular groove 11 of a circle cross section semicircular in shape, the size of this lock body annular groove 82 and valve gap annular groove 11, shape is identical, therefore when lock body 8 is after valve gap 1 top is in place, lock body annular groove 82 just in time fastens and forms the passage that cross section as shown in Figure 2 is rounded with valve gap annular groove 11, six steel balls 2 also are set in passage, thereby formed the movable linkage structure of lock body 8 relative valve gaps 1, be lock body 8 relatively valve gap 1 make radial rotating, but can't realize axially upwards drawing disengaging.On valve gap 1, also can have additional Cock screw 9, the inner of this Cock screw is stretched in valve gap annular groove 11, so that being connected between lock body 8 and valve gap 1 is difficult for getting loose.
Described locking closure 5 is arranged on lock body 8 tops, this locking closure 5 as shown in Figure 7, its middle part, bottom surface is provided with the disjunctor cover 51 to downward-extension, therefore the cross section of whole locking closure is " T " font, insert in lock body at disjunctor cover 51 tops from lock body 8 through holes of described locking closure 5 bottoms, and the valve rod of valve 4 exposed junctions are hidden in locking closure 5; Described locking closure 5 peripheries, bottom surface also are provided with the surrounding edge 52 of a circle to downward-extension.
The volume size that the main basis of the magnitude setting of described interlock assembly 3 on each valve is worked as early gate is determined, per pass interlock assembly 3 can independently be born locking or release, therefore magnitude setting is more, Security is just higher, the present embodiment has adopted the identical three road interlock assemblies of structure, this three roads interlock assembly 3 is done equidistantly to be arranged on successively between disjunctor cover 51 and lock body 8 along vertical, at the lock body top, also be provided with the nut 6 be threaded, Ta Jiang tri-road interlock assemblies 3 fix, in nut 6 is just in time covered and merges and to be hidden in by the surrounding edge 52 of locking closure 5 bottom surfaces, prevent that effectively nut 6 is operated.And the back-out distance of nut is also limited by locking closure 5 bottom surfaces, therefore expose nut 6 even destroy surrounding edge 52, can not cause nut to screw out from lock body 8 tops yet.
Described per pass interlock assembly 3 includes the locking annular groove 511 be arranged on disjunctor cover 51 outer circumferential faces, also comprise a plurality of lockholes 83 and the driver plate 32 of movable set outside the upper cylindrical sleeve of lock body 8 on the upper cylindrical sleeve that is arranged on lock body 8, outside driver plate, be provided with the combination disk 31 that suit connects.
Centered by the center of circle of described a plurality of lockhole 83 above cylindrical sleeve, make circumference uniform distribution, a plurality of lockholes 83 are corresponding with locking annular groove 511 positions on disjunctor cover 51, and are on same level.In general, the quantity of lockhole 83 mainly according to combination disk 31 arrange complexity, and locking closure 5 and lock body 8 between join strength take, in the present embodiment, be symmetrically arranged two with the lockhole 83 of locking annular groove 511 corresponding settings.
In described two lockholes 83, be respectively equipped with a steel lock ball 33, lock ball 33 in each lockhole 83 all has the inner of exposing in the locking annular groove 511 that is arranged on disjunctor cover 51, this lock ball 33 is inner to be formed identical equipped with locking annular groove 511, in lock ball 33 the inners, enter in locking annular groove 511, can prevent that locking closure 5 breaks away from from lock body 8, now whole interlock assembly 3 is in lock state as shown in Figure 4; And lockhole 83 the inners also can be provided with interior shoulder, it can prevent that lock ball 33 the inners from holding out against fully in locking annular groove 511, so that locking closure 5 is stuck when lock body 8 rotates.
Lock ball 33 outer ends are in direct contact with on driver plate 32 inner rings, and on the driver plate inner ring, also need to arrange as shown in Figure 9 and lock ball 33 quantity, position corresponding ball-type groove 322 all, and all be designed with curve bath 323 in the upper and lower both sides of each ball-type groove, in this curve bath, be embedded with magnetic patch 35; The purpose of design ball-type groove 322 and magnetic patch 35 is when driver plate 32 rotations, lock ball 33 are made circular-rotation along the driver plate inner ring, when in a single day lock ball 33 outer ends rotate to the ball-type groove 322 of driver plate 32 inner rings, namely can be adsorbed by magnetic patch 35, and make lock ball 33 outer ends coincide to enter in ball-type groove 322, and lock ball 33 the inners are from the interior disengaging of locking annular groove 511 of disjunctor cover 51, now whole interlock assembly 3 is in released state as shown in Figure 6, and locking closure 5 just can break away from from drawing on lock body 8; In described lock body 8 and driver plate 32, also be provided with the driver plate fixed hole 34 that runs through simultaneously lock body 8 and driver plate 32, this driver plate fixed hole is mainly used in inserting for the inserted link (not shown), resets to carry out password.
Described combination disk 31 can be as shown in Figure 5 with the suit linkage structure of driver plate 32, it is in driver plate 32 outer rings, to be provided with the shallow slot 321 of a plurality of circumference uniform distributions, correspondingly at combination disk 31 inner rings, be provided with the equipped boss 311 of a plurality of and shallow slot, combination disk 31 is rotated and can be done synchronous the rotation by equipped mutually boss 311 and shallow slot 321 drive driver plates 32, and the boss 311 that design is equipped with mutually and shallow slot 321 are also rotate and lost efficacy for the current unlocking pin set of limit for cryptographic dish 31 can not be subjected to combination disk.Simultaneously, while when the interior insertion inserted link of driver plate fixed hole 34, making the limited in rotation of driver plate 32, only during rotational password dish 31, boss 311 on combination disk can enter in next shallow slot from skidding off in the shallow slot 321 on current driver plate 32, combination disk 31 is rotated and but can not driven driver plate and synchronously rotate relative to driver plate 32, now for combination disk 31, resets the password state.
Described combination disk 31 outer peripheral surfaces are provided with a number of turns word 36, this number of turns word is divided into two groups, every group is all 0 ~ 9 these ten numerals, it was respectively equipped with numeral 0 before this as starting point at diameter line two ends of combination disk 31, then in the scope of 180 °, rotate and arrange 1 ~ 9 successively clockwise according to the equal angles edge; Described digital 36 groups of numbers also can carry out appropriate design according to lockhole 83 quantity that arrange on same level usually, when numeral 36 is limited in 0 ~ 9 scope, in case lockhole 83 quantity are more, join strength between locking closure 5 and lock body 8 is higher, but can cause digital recurrence rate to uprise, and reduce the release difficulty of password; Otherwise, reduce the join strength between locking closure 5 and lock body 8, but can improve the release difficulty of password.
Two lockholes 83 in described upper and lower adjacent two interlock assemblies 3 are general to be adopted and intersects the design of staggering, and both, in order to improve the design strength of lock body 8, also can increase the release difficulty.
Between described upper and lower adjacent two interlock assemblies 3, also need to arrange spacer ring 7 and carry out interval, outside this spacer ring such as Fig. 3, the upper cylindrical sleeve that is sleeved on lock body 8 shown in Figure 10, by disjunctor, designing inserted block 71 on spacer ring 7 inner rings joins and is inserted in the set jack of cylindrical sleeve outer surface 84, thereby form being connected and fixed between spacer ring 7 and lock body 8, and spacer ring 7 is actually and isolates for the driver plate 32 by upper and lower twice interlock assembly 3 and combination disk 31, interfere to prevent that driver plate 32, combination disk 31 in adjacent twice interlock assembly 3 from rotating to produce.
This interlock assembly 3 is all independently to bear locking or release, therefore must three interlock assemblies be carried out locking closure 5 to be taken off from lock body 8 after release simultaneously, as long as one of them not release of interlock assembly 3, between locking closure 5 and lock body 8, all be and be connected lock state, the quantity of interlock assembly 3 is more, also makes undoubtedly the release difficulty larger.
Under normal conditions, lock ball 33 the inners in per pass interlock assembly 3 are all inside and outside lockhole 83, to be exposed in the locking annular groove 511 of disjunctor cover 51 in the present invention, now are subjected to lock ball 33 chuckings to make locking closure 5 to take off from lock body 8, when the needs release, need rotation per pass combination disk 31, and make the numeral 36 on combination disk forward the preset password digit position to, generally when combination disk 31 forwards the preset password digit position to, the rotation meeting of combination disk 31 synchronously drives driver plate 32 and rotates, and the ball-type groove 322 that makes the driver plate inner ring is over against the lock ball 33 in lockhole 83, be arranged on ball-type groove 322, the magnetic patch 35 of lower both sides will adsorb the locking annular groove 511 interior disengaging of lock ball 33 the inners from disjunctor cover 51, the combination disk 31 of three road interlock assemblies 3 all forward the preset password position to and by lock ball 33 the inners simultaneously when holding in corresponding disjunctor cover 51 locking annular grooves 511, locking closure 5 could take off from lock body 8, now can handle valve rod 4 exposed junctions of valve with opening/shutting valve.
Claims (9)
1. a valve locking closure, comprise the lock body (8) that is movably connected in valve gap (1) top and the locking closure (5) that is movably connected in the lock body top, it is characterized in that:
A, described locking closure (5) bottom are provided with the disjunctor cover (51) to downward-extension, and this disjunctor cover inserts in lock body from lock body (8) top, and the valve rod of valve (4) exposed junction is hidden in locking closure (5);
Between b, described disjunctor cover (51) and lock body (8), be provided with multiple tracks interlock assembly (3), this multiple tracks interlock assembly is along vertically setting gradually;
C, described per pass interlock assembly (3) include the locking annular groove (511) be arranged on disjunctor cover (51) outer circumferential face, also comprise be arranged on upper and corresponding with locking annular groove (511) the position a plurality of lockholes (83) of lock body (8), and movable set outside lock body (8) and the driver plate (32) corresponding with locking annular groove (511) position, outside driver plate, be provided with the combination disk (31) that suit connects, the outer circumferential face of this combination disk is provided with a number of turns word (36);
In d, described each lockhole (83), be equipped with lock ball (33), expose in the locking annular groove (511) that is arranged on disjunctor cover (51) this lock ball the inner, and lock ball (33) outer end contacts on driver plate (32) inner ring;
E, described driver plate (32) inner ring are provided with the ball-type groove (322) that lock ball (33) outer end interior with described lockhole (83) is equipped with mutually, and the upper and lower both sides of this ball-type groove are respectively equipped with magnetic patch (35).
2. valve locking closure according to claim 1, is characterized in that described combination disk (31) and the suit linkage structure of driver plate (32) are between driver plate (32) outer ring and combination disk (31) inner ring, to be respectively equipped with equipped mutually shallow slot (321) and boss (311).
3. valve locking closure according to claim 1, is characterized in that being provided with the driver plate fixed hole (34) that runs through simultaneously lock body (8) and driver plate (32) in described lock body (8) and driver plate (32).
4. valve locking closure according to claim 1, it is characterized in that described lock body (8) top is provided with the nut (6) of spacing multiple tracks interlock assembly (3), outside described locking closure (5) bottom surface, be arranged with a corral limit (52), this surrounding edge cover is combined in outside nut (6).
5. valve locking closure according to claim 1, it is characterized in that between described adjacent twice interlock assembly (3) being provided with spacer ring (7) separately, this spacer ring inner ring is provided with inserted block (71), correspondingly at lock body (8) outer surface, is provided with described inserted block (71) and fixes and join slotting jack (84).
6. valve locking closure according to claim 1, is characterized in that the upper and lower both sides of ball-type groove (322) of described driver plate (32) inner ring are respectively equipped with curve bath (323), and described magnetic patch (35) is embedded respectively in this curve bath (323).
7. valve locking closure according to claim 1, it is characterized in that in described per pass interlock assembly (3) being arranged on disjunctor cover (51) outer circumferential face locking annular groove (511) be arranged on a plurality of lockholes (83) on lock body (8) all on same level; A plurality of lockholes (83) position on the described lock body (8) be arranged in adjacent twice interlock assembly (3) is to intersect and staggers.
8. valve locking closure according to claim 1, it is characterized in that described lock body (8) and movable connection structure between valve gap (1) are to be respectively equipped with lock body annular groove (82) corresponding to position and valve gap annular groove (11) on lock body (8) internal surface and valve gap (1) outer surface, described a plurality of steel balls (2) are arranged in lock body annular groove (82) and valve gap annular groove (11) simultaneously.
9. valve locking closure according to claim 1, is characterized in that described valve gap (1) is provided with Cock screw (9), and the inner of this Cock screw is stretched in valve gap annular groove (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310376807.0A CN103411022B (en) | 2013-08-27 | 2013-08-27 | Valve locking closure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310376807.0A CN103411022B (en) | 2013-08-27 | 2013-08-27 | Valve locking closure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103411022A true CN103411022A (en) | 2013-11-27 |
| CN103411022B CN103411022B (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310376807.0A Active CN103411022B (en) | 2013-08-27 | 2013-08-27 | Valve locking closure |
Country Status (1)
| Country | Link |
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| CN (1) | CN103411022B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107706008A (en) * | 2017-08-04 | 2018-02-16 | 国网江苏省电力公司盐城供电公司 | A kind of switch operation device |
| WO2018085975A1 (en) * | 2016-11-08 | 2018-05-17 | 深圳市兰洋科技有限公司 | Valve structure for combination lock |
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| JPS60201105A (en) * | 1984-03-21 | 1985-10-11 | 豊興工業株式会社 | Dial locking mechanism |
| GB2254103A (en) * | 1991-03-18 | 1992-09-30 | Joseph Philip Morrison | Locking mechanism for a valve |
| CN2142522Y (en) * | 1992-12-02 | 1993-09-22 | 曾怀想 | Lock controlled ball valve |
| CN2439583Y (en) * | 2000-06-15 | 2001-07-18 | 赵海成 | Valve with trick lock |
| CN2491670Y (en) * | 2001-06-30 | 2002-05-15 | 王甲民 | Digital valve switch device |
| CN2527820Y (en) * | 2002-02-25 | 2002-12-25 | 万伟刚 | Valve for puzzle lock |
| WO2007052325A1 (en) * | 2005-11-07 | 2007-05-10 | Sergio Franca | Safety tap with changeable combination loc |
| CN201462173U (en) * | 2009-07-15 | 2010-05-12 | 惠金波 | Password-type safety sheath for oil drain valve on oil well pipeline |
| CN203442304U (en) * | 2013-08-27 | 2014-02-19 | 宁波埃美柯铜阀门有限公司 | Valve locking device |
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2013
- 2013-08-27 CN CN201310376807.0A patent/CN103411022B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60201105A (en) * | 1984-03-21 | 1985-10-11 | 豊興工業株式会社 | Dial locking mechanism |
| GB2254103A (en) * | 1991-03-18 | 1992-09-30 | Joseph Philip Morrison | Locking mechanism for a valve |
| CN2142522Y (en) * | 1992-12-02 | 1993-09-22 | 曾怀想 | Lock controlled ball valve |
| CN2439583Y (en) * | 2000-06-15 | 2001-07-18 | 赵海成 | Valve with trick lock |
| CN2491670Y (en) * | 2001-06-30 | 2002-05-15 | 王甲民 | Digital valve switch device |
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| WO2007052325A1 (en) * | 2005-11-07 | 2007-05-10 | Sergio Franca | Safety tap with changeable combination loc |
| CN201462173U (en) * | 2009-07-15 | 2010-05-12 | 惠金波 | Password-type safety sheath for oil drain valve on oil well pipeline |
| CN203442304U (en) * | 2013-08-27 | 2014-02-19 | 宁波埃美柯铜阀门有限公司 | Valve locking device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018085975A1 (en) * | 2016-11-08 | 2018-05-17 | 深圳市兰洋科技有限公司 | Valve structure for combination lock |
| CN107706008A (en) * | 2017-08-04 | 2018-02-16 | 国网江苏省电力公司盐城供电公司 | A kind of switch operation device |
| CN107706008B (en) * | 2017-08-04 | 2020-04-14 | 国网江苏省电力公司盐城供电公司 | Switch operating device |
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| Publication number | Publication date |
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| CN103411022B (en) | 2015-12-02 |
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