CN2186192Y - Light hydraulic tracting track type one-way rerailer - Google Patents
Light hydraulic tracting track type one-way rerailer Download PDFInfo
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- CN2186192Y CN2186192Y CN 93228196 CN93228196U CN2186192Y CN 2186192 Y CN2186192 Y CN 2186192Y CN 93228196 CN93228196 CN 93228196 CN 93228196 U CN93228196 U CN 93228196U CN 2186192 Y CN2186192 Y CN 2186192Y
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- rerailer
- rerail
- boss
- unidirectional
- traction
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Abstract
The utility model relates to a light hydraulic traction track type one-way rerailer which is suitable for being used in the rescue of the derailment accident of more than two trains at least for accomplishing one-way rail recovering work ina method that hydraulic traction power is used for replacing the traction power of a locomotive. The utility model is characterized in that the one-way rerailer is provided with a hydraulic traction top pick with a steel sleeve rope, and two groups of track type rerailers which are symmetrical and independent right and left; the track type rerailers are supported by a left and a right one-way wheels on a tread surface. Each group of track type rerailers is provided with two support lug bosses and a railing recovering lug boss. The track type one-way rerailer is composed of the three arched lug bosses in the same oblique direction.
Description
1, the existing chevron pointing rerailer of China overview
Chinese people font rerailer existing five more than ten years history, though update, still do not change the intrinsic drawback of chevron pointing rerailer so far through half a century.For example: the inboard wheel rim point contact of chevron pointing rerailer circuit top support plate, the big unbalance loading that leaves the right or normal track again brings adverse consequencess such as rerailer overturning for the rerail operation.Only former weight is reduced to 110 kilograms by 180 kilograms.Bring the heavy manual labor of benzene still for the rerail operation.
Expendable weight is a principal contradiction of improving rerailer, and Zhengzhou Railway Administration has stepped major step in this respect.This year has newly been succeeded in developing first in China " light aluminum alloy chevron pointing rerailer " in this innings, and single-piece weight reduces to 55 kilograms, and (proportion is 2.8T/m
2, tensile strength is 58kg/mm
2).
But to reduced volume, raising intensity and service life, some supporting unbalance loading aspect also needs further to research and solve on cost-cutting and the rerailer top board.Therefore, continue the research rerailer, be very important.
To the derailing characteristics, the problem that existing chevron pointing rerailer is existed is described further below in conjunction with wheel:
Fig. 1, be the wheel on standard gauge, each size relationship of operation.
Fig. 2, be the wheel on the standard trajectory derailing after, each size relationship between wheel rim and the track.
Fig. 3,4, be symmetrical scalene chevron pointing rerailer rerail assembly birds-eye view.
(1) equilateral chevron pointing rerailer:
This rerailer, the both sides beveled edge respectively has boss, is equilateral triangle structure almost.Take turns as can be known after the derailing according to Fig. 1,2, the inboard wheel rim of circuit leaves the right or normal track apart from the distance that leaves the right or normal track than circuit outer rim greater than 122 millimeters.This increases unnecessary horizontal unbalance loading must for circuit outside rerailer boss.It is a kind of least desirable chevron pointing rerailer.
(2) scalene chevron pointing rerailer:
This rerailer feature: according to Fig. 2,3,4, as can be known, the derailing wheel leaves the right or normal track distance greater than 122 millimeters to the inboard wheel rim of the circuit distance that leaves the right or normal track than circuit outer rim, has designed scalene chevron pointing rerailer according to these characteristics.Rerailer almost keeps equidistant to the wheel that derails to outside rerailer boss distance in wheel rim and the circuit like this, then leaves the right or normal track at circuit outside rerailer boss and shortens 122 millimeters apart from the distance that leaves the right or normal track than the inboard rerailer boss of circuit.And this boss bogie wheel tread line contact supporting, this rerailer is a kind of more reasonable than preceding.
But concerning the inboard rerailer boss of circuit, no matter any chevron pointing rerailer, its rerailer top board contact supporting with sharp-pointed wheel rim point and the greatly horizontal unbalance loading that leaves the right or normal track etc. must be brought deadly defect to chevron pointing rerailer inboard.
(3) the inboard boss of chevron pointing rerailer circuit has following drawback:
The first, when derailing is taken turns rerail, sharp-pointed wheel rim supports along some contact on the rerailer top board, and rolling limit, limit punctures this top board.For example: 21.5 tons of heavy wheel rim of locomotive point contacts of mean axis are bearing on the rerailer top board, and its maximum point contact stress can reach 8455kg/cm
2, surpass allowable some contact stress 6500kg/cm of ZG55 cast steel
2The generic point contact stress is 2.5 times of line contact stress.Its as a result the wheel rim pressure ditch that on the rerail top board, stays a lot of significantly puncture vestige.
The second, because the inboard wheel rim of circuit leaves the right or normal track distance than the circuit outside greater than 122 millimeters, be objectively to have caused bigger horizontal unbalance loading to the rerailer inboard.Here it is rerailer causes the major cause of overturning easily in the rerail process.
Three, when derailing is taken turns rerail, the inboard boss of circuit borrows tractive force to force wheel rim along boss toward the horizontal rerail of track, and Here it is produces horizontal reaction thrust for circuit inboard rerailer boss.This be the chevron pointing rerailer in the rerail process, easily cause second reason of overturning.
In a word, the circuit inboard wheel rim point contact supporting and the big laterally unbalance loading that leaves the right or normal track are the two big drawbacks that the chevron pointing rerailer is had.It also is the key problem of this rerailer of reform.
(4) the general integrated structure of the two-way rerail in the chevron pointing rerailer left and right sides:
According to actual rerail operating feature, from alleviating single-piece weight angle, the essentiality of the two-way General Construction in the left and right sides is little, as long as adopt unidirectional rerail mode, could thoroughly reform the intrinsic drawback of chevron pointing rerailer, and half is many to make single-piece weight saving, again for using the rail mounted rerail to create good condition.This is second key problem of reform chevron pointing rerailer.
(5) as can be known, adopt pin to be connected between existing chevron pointing rerailer and the rail, this mode can only be controlled the track vertical direction, and can not control the track fore-and-aft direction according to Fig. 3.Should could cancel the attached part in addition of connection from the special pawl structures of structure design.
(6) existing chevron pointing rerailer material is a ZG55 cast steel, 65kg/mm
2Intensity is lower.Should adopt high strength material, further expendable weight.Should adopt higher-strength 30crMnMo cast steel, 85kg/mm
2Intensity is higher.
(7) existing chevron pointing rerailer rerail poor-performing.The factor that influences the rerail performance is a lot.But the most critical factor is the inboard boss height of circuit.30 millimeters of chevron pointing rerailer arch boss height, 588 millimeters of 1000 millimeters of radius of curvature R and wheel rim of locomotive radius Rs, at this moment, the actual rerail usable height of this boss only has 19 millimeters.Calculate according to theory, its rerail coefficient has only 1.6, and by in-place test examination proof, its rerail performance is relatively poor really.
In a word,, also have above-mentioned reason, aspect practical application, be subjected to a lot of restrictions because chevron pointing rerailer volume weight is excessive.Still unresolved for a long time internal combustion of China railways and electric locomotive carry this hard nut to crack of rerailer.
The unidirectional rerailer of 2 railway formulas
(1) the utility model rerailer is the problem that exists at above-mentioned chevron pointing rerailer, solves the inboard drawback that exists of circuit of chevron pointing rerailer emphatically and design-calculated.This rerailer is widely used in the rerail work of two above derailment accidents of train, especially volume is little in light weight, be specially adapted to locomotive and carry rerailer, train locomotive is in operation and takes place under the situation of slight derailing, carry out rerail work by locomotive self power whenever and wherever possible, at this moment as long as with one group of unidirectional rerailer of rail mounted (two), adopt forward or change the mode of direction, can carry out rerail work to the left and right directions car that derails fully.Thereby alleviate the volume weight of half, its economic benefit is the portable rerailer of best novel locomotive.
Below in conjunction with following all figure, specify as follows to the unidirectional rerailer of rail mounted:
Fig. 5,6 is the one group of unidirectional rerailer assembly of rail mounted birds-eye view in the outside in the circuit left-hand
Fig. 7 is the unidirectional rerailer front view of circuit left-hand inner track formula
Fig. 8 is the unidirectional rerailer birds-eye view of circuit left-hand inner track formula
Fig. 9 is the unidirectional rerailer left view of circuit left-hand inner track formula
Figure 10 is the unidirectional rerailer N-N of circuit left-hand inner track formula part sectional view
This structure, by outside supporting boss 1, inboard supporting boss 2, rerail boss 3, outside button rail support 4, inboard button rail support 5, inboard ratchet 6, outside ratchet 7, interior wing base 8, outer wing base 9, outer side shield 10, interior side shield 11, water pillow 12, circuit rail 13, derailing wheel to 14, deck 15, etc. form.
(2) use and field of application
This rerailer is without any attached in addition part, has easy for installationly, and volume is little, flexibly, and advantage such as rerail is reliable and stable.According to Fig. 5,6, earlier on the water pillow 12 outside the one group of unidirectional rerailer base 8,9 of rail mounted in the outside is installed in the circuit respectively in the circuit left-hand, as rerailer inlet supporting basis, and make inside and outside side shield 10,11 and inside and outside gemmule pawl 6,7 respectively across on water pillow 12, rerailer inlet base 8,9 firmly is connected on the water pillow.Meanwhile, as long as interior outside button rail support 4,5 is buckled in respectively above the track, only just finish the operation of reorganizing and outfit of rerail with a few minutes.
In addition, the effect of the supporting deck 15 of wing base in the circuit among Fig. 7,10, water pillow central recessed inclined-plane fills a vacancy to support and establishes.When installing on sleeper, the car deadweight that takes this opportunity forces supporting deck 15 all to prick sleeper, makes the inboard support plinth maintenance of the unidirectional rerail of rail mounted level.This rerailer is common to the steel rail line of water pillow and sleeper like this.This base to tracked retracker has been created stability fundamental.This rerailer is common to 43,50,60,75 kilograms of circuit rail simultaneously.
(3) this rerailer structure principal character
1. the unidirectional rerail mode in the independent left and right sides
It is unidirectional that general derail accident nearly all occurs in a certain side, and opposite side is not derailing.Derailed in both sides, then both sides are respectively installed two groups of unidirectional rerailers in the left and right sides respectively, finish the two-way rerail work in the left and right sides in the same old way.Little from the essentiality that alleviates single-piece volume, the two-way General Construction in the weight angle left and right sides.So the utility model rerailer adopts two groups of unidirectional rerail modes in the independence left and right sides, forms by four altogether.This not only solves and dwindles rerailer single-piece, volume, weight issue, but give the unidirectional rerailer of rail mounted apply the creation good basis.
2. rerail boss
About rerail principle problem, some people thinks, the boss of circuit both sides chevron pointing rerailer plays the rerail effect to the derailing wheel simultaneously to left and right sides wheel rim.This is a kind of misunderstanding on directly perceived.Apart from being 1419 millimeters, is a changeless rigidity size to the wheel rim outside according to Fig. 1, wheel.Be 1435 millimeters at utilization circuit linear section circuit gauge then, railway line gauge allowance error is widely must not surpass 6 millimeters, narrow must not be above 2 millimeters.At 650 meters of track curvature radiuses and following, its gauge maximum must not widen above 15 millimeters, and the object line rail is variant apart from each section, and the installation of rail and rerailer is with big loosening connection structure.This shows, between rigidity size and the non-rigid size fully engagement be impossible.So the rerailer boss of installing on two rail of circuit to left and right sides wheel rim, plays having a remote possibility of rerail effect to wheel simultaneously, even exist hardly.This shows that rerail needn't be established two boss, is passable fully but only establish a rerail boss 3.The horizontal gradient of rerail boss is to depend on maximum transversal rerail distance and rerail land length fully and determine.According to 1, the 2 supporting tread characteristics of outside rerailer supporting boss in the circuit, the rerail boss must be located at the inboard rerailer of circuit and leave the right or normal track on the beveled edge far away, its reason is: the first, when derailing wheel during to rerail, the rerail effect of leading is worked along the rerail boss in inboard that must the inboard wheel rim of circuit.The second, rerail boss 3 bogie wheel tread load not so improve rerail boss height, can improve the rerail performance accordingly.
3. rail mounted supporting boss
Principal character is: two groups of left-right symmetric and the unidirectional rerail in the independent left and right sides, the tracked retracker of wheel tread supporting.According to Fig. 5,6, every group of rerailer is made up of the inboard rerail boss 3 of side bearing boss 1,2 and circuit inside and outside two circuits.These two supporting boss height must surpass 35 millimeters of flange heights, and the load of the wheel tread that could derail makes the derailing wheel rim be in vacant state on the rerailer top board all by 1,2 supportings of two supporting boss.And these two supporting boss all are to leave the right or normal track nearerly, and the carrying of this rerail is reasonably, can improve rerailer load-carrying capacity and rerail stability.When derailing is taken turns rerail, borrow the rerail tractive force to force wheel rim along rerail boss 3 toward the horizontal rerail of track, though produce rerail reaction thrust on the rerail boss of rerailer at this moment, produce the rerail reaction thrust of rerail boss 3 but the wheel tread bearing load of supporting boss 2 is far longer than rerail, make rerailer still keep stabilized conditions.Thereby thoroughly eliminated the wheel rim point contact supporting of chevron pointing rerailer circuit inboard, punctured the inboard rerailer of rerailer top board and circuit causes the overturning rerailer than big laterally unbalance loading drawback.
Further speak frankly inboard double polarizing keys 2,3 specific function that is had and the structures of circuit here from design angle.According to Fig. 5,6,7,9, rerailer top board and three boss 1,2,3 all are arches, these three boss all on horizontal surface same gradient be parallel to each other.But for the derailing wheel rim is introduced smoothly the rerail inlet of the inboard rerailer double polarizing keys 2,3 of circuit from ground, this inlet supporting boss 2 makes oblique half horn opening.In addition, wheel tread supporting center and wheel rim and before and after producing in the rerail process at rerail in the middle of the double polarizing keys, about laterally contact boss spacing be certain.These two kinds of spacings all depend on three factors; The one,, the double polarizing keys height, the 2nd,, locomotive or vehicle wheel rim radius.The 3rd, the radius of curvature of supporting boss 2.These three kinds of factor sizes are big more, and its supporting-point all around spacing is big more.Wherein longitudinal separation is that the wheel support center is to wheel rim and double polarizing keys lateral support point longitudinal separation, so in the rerail process, the rerail of wheel center is fulfiled a segment distance all the time ahead of schedule.According to this distance, the supporting boss 2 of double polarizing keys outlet makes the double polarizing keys rerail go out interruption-forming half cone opening by the oblique straight line that is parallel to rail that changes into.Secondly, double polarizing keys is distance between left and right laterally, is line length of contact between control wheel tread and the supporting boss 2 in the rerail process, its line contacts minimum length must guarantee 20 millimeters, so the height of appropriate design double polarizing keys and radius of curvature and spacing are the success or failure keys of the unidirectional rerailer of rail mounted.
In a word, the inboard rerailer of circuit, double polarizing keys have and samely obliquely are parallel to each other and certain transverse pitch is arranged, and its rerail inlet supporting boss 2 forms oblique half horn opening, and rerail outlet supporting boss 2 forms the half cone opening.
Conclusion is got up, and double polarizing keys has following function:
1, the inboard rerailer tool of circuit double polarizing keys at regular intervals, its supporting boss 2 leaves the right or normal track very near, has fundamentally improved rerail stability and load-carrying capacity.When rerail boss 3 highly was 50 millimeters in addition, its rerail performance ratio chevron pointing rerailer improved more than 3 times.
2, in 300 millimeters of the maximum derailing distances, no matter derailing apart from what, can both successfully be introduced the derailing wheel rim from ground the rerail inlet of double polarizing keys, this creates good condition just for the rail mounted rerail.
3, double polarizing keys has same oblique parallel certain transverse pitch is arranged again, could guarantee the accuracy and the reliability of track rerail.
4, when derailing wheel when surpassing the horizontal gradient of rerail, in the rerail process, be transferred to normal rerail gradient automatically by this double polarizing keys spacing, carry out rerail work simultaneously.From this point, other any rerailers all do not possess this function.
3, hydraulic haulage mechanism
This system is made up of hydraulic haulage actuating unit and ultrahigh voltage hydraulic pump station.Figure 11 is the hydraulic transmission principle scheme drawing of hydraulic haulage mechanism, specifies as follows below in conjunction with Figure 11:
1. the hydraulic haulage actuating unit is made up of traction top pick anchor fitting and traction top pick.Traction top pick anchor fitting is 3. to be connected to form by 1. 2 of rail decks, 2. 4 on chock, annular steel sleeve rope.Operating feature is, if with sledgehammer chock 2. throw into circuit both sides rail deck 1. about inboard, then 3. annular steel sleeve rope is connected and is hung on circuit both sides rail deck and 1. 10. goes up with traction top pick fixed mount, just can push up pick by fixed traction with a few minutes.Operation is reorganized and outfit in this traction that dismounting is continually moved, and has created flexible condition.
Traction top pick be by steel sleeve rope 4., the ratchet front clamp seat 5., 6. 8 of extension springs, 7. 2 on detent cam switch, 8. 8 on ratchet, 9. 8 of ratchet locating dowel pins, top pick fixed mount 10., outer cylinder block
, the hollow piston bar
, the internal layer hollow cylinder body
, deck behind the ratchet
, quick coupling
2 form.
Architectural feature: be in the hollow piston bar is sleeved on, in the middle of the outer double-layer hollow cylinder body, preceding four ratchets are fixed in the ratchet front clamp seat of piston rod front end, four ratchets in back are fixed in deck behind the ratchet of cylinder body afterbody, by the piston rod reciprocating travel, and by forward and backward ratchet and cam activated switch the traction steel sleeve rope is passed traction and push up pick centre hole transmitting tractive power, formed steel sleeve rope hydraulic haulage mechanism.
The operation of traction top pick: when traction top pick piston rod
During elongation, four ratchets of piston rod front end block first segment traction steel sleeve rope steel bushing 4. automatically and draw 8. by four extension springs pulling force 6., and 4. this traction steel sleeve rope is made up of 13 joint steel bushings, its pitch is 400 millimeters, and traction top pick range is 450 millimeters.Work as piston rod
When being elongated to 400～450 millimeters, four ratchets of cylinder body afterbody block the 3rd joint traction steel sleeve rope steel bushing 4. automatically 6. also by four extension springs pulling force 5., just finish traction top pick piston rod draft travel for the first time.The effect of four ratchets of cylinder body afterbody here is for preventing that steel sleeve rope from retreating design-calculated.When the piston rod backhaul reached 400～450 millimeters, 8. four ratchets of piston rod front end blocked second joint traction steel sleeve rope steel bushing 4. again automatically.At this moment can make the piston rod of traction top pick
Carry out the towage second time.Repeating like this to reach maximum hauling distance 10 times is 4 meters.When needing to draw again, just open forward and backward detent cam switch 7., the 4. reposition again of traction steel sleeve rope, unload chock with sledgehammer then and 2. 1. the rail deck is moved along to needed distance, again with sledgehammer chock 2. throw into again circuit both sides rail deck 1. about inboard, at last 3. annular steel sleeve rope is connected and be hung on circuit both sides rail deck and 1. 10. go up with top pick fixed mount, just finish the operation of reorganizing and outfit of fixed traction top pick, this just can enter the traction rerail operation of subordinate phase.Like this till the whole rerails of derailing wheel.Drawing 4 meters required production times is 18 minutes.Top pick tractive force limit can reach 35 tons, surpasses 28.4 tons of the maximum starting tractive efforts of the type steam locomotive that advances.The hydraulic haulage power replacement locomotive tractive effort is fully possible thus.Thereby finish the China railways locomotive always as the history of the unique power of rerailer.Be expendable weight, the material of this hydraulic haulage top pick all adopts the 35CrMnsi high strength alloy steel.
2, ultrahigh voltage hydraulic pump station
This pumping plant is by quick coupling
, three position four-way directional control valve
, compression indicator
, dash pot valve
, fuel tank
, fuel screen
, the superhigh pressure radial plunger pump
, check valve
, by pass valve
Form.According to the open-air handwork characteristics of accident rescue, be expendable weight to greatest extent, this hydraulic oil pump adopts 100Mpa pressure, and flow is 20 kilograms of 4.06 liters/minute, deadweight, its power is 37 kilograms of single cylinder spark ignition engines, and all the other pumping plant hydraulic transmission principles are with common hydraulic power unit.
Among Figure 11, except that hydraulic haulage mechanism, the relevant fixed equipment of rerail is by the circuit rail
, sleeper
, the unidirectional rerailer of dextrad outer side track formula
, the unidirectional rerailer of dextrad inner track formula
, the derailing car hitch
Form.
Claims (4)
1, the utility model is the unidirectional rerailer of a kind of light hydraulic traction track formula, be applicable in two above derail accident rescues, replace the locomotive traction power with the hydraulic haulage power that carries and finish the unidirectional rerail work of rail mounted, it is characterized in that: have the hydraulic haulage top pick of band steel sleeve rope and the tracked retracker of two groups of left-right symmetric and the supporting of independent left and right sides one-way wheel tread, every group of rerailer has two supporting boss and a rerail boss, forms the unidirectional rerailer of rail mounted by the boss of these three same oblique arches.
2, the unidirectional rerailer of light hydraulic traction track formula according to claim 1 is characterized in that: hydraulic haulage mechanism is sleeved on the hollow piston bar in the middle of the inside and outside double-layer hollow cylinder body, preceding four ratchets are fixed in deck behind the ratchet that the ratchet front clamp seat of piston rod front end, back four ratchets be fixed in the cylinder body afterbody, by the piston rod reciprocating travel, and by forward and backward ratchet and cam activated switch the traction steel sleeve rope is passed traction and push up pick centre hole transmitting tractive power, formed steel sleeve rope hydraulic haulage mechanism.
3, the unidirectional rerailer of light hydraulic traction track formula according to claim 1, it is characterized in that: every group of unidirectional rerailer in medial and lateral has a supporting boss, is same obliquely be parallel to each other again, and these two boss bogie wheel treads play the track effect during rerail.
4, the unidirectional rerailer of light hydraulic traction track formula according to claim 1 is characterized in that: in every group of unidirectional rerailer in medial and lateral, an ad hoc rerail boss plays the rerail directional tagging on inboard rerailer.The same oblique parallel of the inboard double polarizing keys of circuit has certain transverse pitch again, and its double polarizing keys rerail inlet forms oblique half horn opening, and the rerail outlet forms the half cone opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93228196 CN2186192Y (en) | 1993-05-14 | 1993-05-14 | Light hydraulic tracting track type one-way rerailer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93228196 CN2186192Y (en) | 1993-05-14 | 1993-05-14 | Light hydraulic tracting track type one-way rerailer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2186192Y true CN2186192Y (en) | 1994-12-28 |
Family
ID=33805310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93228196 Expired - Fee Related CN2186192Y (en) | 1993-05-14 | 1993-05-14 | Light hydraulic tracting track type one-way rerailer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2186192Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529996A (en) * | 2012-01-12 | 2012-07-04 | 张宏生 | Trailing equipment |
| CN109017862A (en) * | 2018-07-26 | 2018-12-18 | 佛山三水鼎力液压机械设备有限公司 | A kind of continuity hydraulic traction device |
| CN109131424A (en) * | 2018-07-26 | 2019-01-04 | 佛山三水鼎力液压机械设备有限公司 | A kind of chain fastener type hydraulic traction device |
| CN117087718A (en) * | 2023-10-19 | 2023-11-21 | 吉林市祥隆铁路救援技术开发有限公司 | Double-hydraulic-cylinder traction equipment |
-
1993
- 1993-05-14 CN CN 93228196 patent/CN2186192Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529996A (en) * | 2012-01-12 | 2012-07-04 | 张宏生 | Trailing equipment |
| CN109017862A (en) * | 2018-07-26 | 2018-12-18 | 佛山三水鼎力液压机械设备有限公司 | A kind of continuity hydraulic traction device |
| CN109131424A (en) * | 2018-07-26 | 2019-01-04 | 佛山三水鼎力液压机械设备有限公司 | A kind of chain fastener type hydraulic traction device |
| CN117087718A (en) * | 2023-10-19 | 2023-11-21 | 吉林市祥隆铁路救援技术开发有限公司 | Double-hydraulic-cylinder traction equipment |
| CN117087718B (en) * | 2023-10-19 | 2024-01-30 | 吉林市祥隆铁路救援技术开发有限公司 | Double-hydraulic-cylinder traction equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |