CN2659766Y - Suspension gear of railway rigid contact net - Google Patents
Suspension gear of railway rigid contact net Download PDFInfo
- Publication number
- CN2659766Y CN2659766Y CN 03262613 CN03262613U CN2659766Y CN 2659766 Y CN2659766 Y CN 2659766Y CN 03262613 CN03262613 CN 03262613 CN 03262613 U CN03262613 U CN 03262613U CN 2659766 Y CN2659766 Y CN 2659766Y
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- CN
- China
- Prior art keywords
- insulator
- bracing struts
- buttress bracing
- fixed
- wire clamp
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- 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.)
- Expired - Lifetime
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- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The utility model discloses an electrical source wiring fixing device contacting with the electrified motor vehicle current collector. The utility model adopts four profile steels which are perpendicular with each other within one plane to form a rectangle structured fixing pedestal by welding, an insulator pedestal is fixed on the fixing pedestal, and an insulator is fixed on the fixing pedestal through the insulator pedestal. This method can simplify the installation of the insulator, and at the same time, the connection rigidity between the insulator and the fixing pedestal can be improved. The utility model adopts hanging the wire clamp at the middle and anchoring wire clamp to fix the rigidity girder, and enables the girder play among the hanging wire clamps, so as to overcome the problem brought by heat expansion and cold shrinkage of the girder.
Description
Technical field
The utility model relates to the power circuit anchor fitting that a kind of and electrified locomotive current collector contacts, and is a kind of supporting or the device that hangs contact system more exactly.Comprise in the device of the present utility model that the buttress bracing struts that has π shape structure, the interlocking joint that connects each buttress bracing struts, wire clamp, insulator, firm banking, the insulator of fixed insulation on firm banking that buttress bracing struts is fixed on the insulator connect base plate.Buttress bracing struts of the present utility model is also referred to as bus duct.
Background technology
Power circuit suspension gear in disclosed electrified locomotive current collector contact generally adopts the overhead contact line with catenary form.Chinese invention patent CN961062061 disclosed " suspension gear of electrical traction vehicle aerial wire and catenary thereof " for example, but this class is suspended on the tunnel planted agent time spent need excavate the lining cutting of casting anchor, need the tunnel that bigger space is arranged, and being subjected to the restriction of condition in the tunnel, the installation of overhead contact line with catenary, adjustment and maintenance are all very difficult.For addressing this problem, Chinese utility model patent 992395526 discloses a kind of " contact system fixed support in the L cantilevered tunnel ".Though this patent can shorten the time of installing with maintenance, but still ubiquitous disadvantage when existing overhead contact line with catenary in the tunnel, to use.
For overcoming the deficiency of overhead contact line with catenary in the tunnel, adopted so-called rigid suspended, i.e. fixing buttress bracing struts on tunnel top as conducting element.
Switzerland " F+F " company has adopted a kind of rigid contact net hang in railway tunnel, its structure is referring to accompanying drawing 1, it is to fix a steel plate on the tunnel side wall, on steel plate, use device fixed insulation of the L type that is fixed thereon, fix another L shaped connecting panel at the insulator front end, again on this connecting panel with the fixing buttress bracing struts of π tee section of wire clamp.The structure of this device is comparatively complicated, makes troubles for Unit Installation and maintenance, is a L shaped cantilever because of its stressed conductive rigid beam and its fixed end simultaneously, and the rigidity of its use and working strength are weakened.Just because of this, this device is restricted in the application of rapid transit railway.
Generally adopt in the subway at home and abroad rigid suspended be that fixed insulation and wire clamp are fixed thereon buttress bracing struts on channel-section steel at top, tunnel anchoring one channel-section steel, referring to accompanying drawing 2.Owing to be to hang contact system with the channel-section steel of anchoring, be wire joint and to show structure thin, its stability is relatively poor with rigidity, is difficult to satisfy the requirement of travelling of high speed train.
Since adopt be buttress bracing struts as conducting element, the het expansion that in use overcomes beam is the problem that must solve.Switzerland " F+F " company adopts the method that expansion joints is set on buttress bracing struts to solve the thermal expansion problem of beam, promptly the side at buttress bracing struts adds expansion slideway and auxiliary slide channel, because it hangs to cantilevered, therefore also need on the tunnel, anchor point be set the both sides from hitch point simultaneously.Obviously, this structure is very complicated, and installation at the scene is also very difficult, more be not easy to adjust, and maintenance workload is very big in the reality operation.
Summary of the invention
The purpose of this utility model provides a kind of prior art deficiency that overcomes, has comparatively simple structure, has stability and rigidity preferably, the operating needs that can adapt to express locomotive, and can simplify construction, reduce the power circuit suspension gear of the new electrified locomotive current collector contact of maintenance difficulties.
Device of the present utility model is the firm banking that adopts the rectangular configuration that orthogonal four shaped steel are welded in same plane, shaped steel wherein has two orthogonal limits at least, on the shaped steel of base, be provided with 3 to 4 holes of matching, on another group shaped steel, be provided with the hole of the sub-base of fixed insulation with anchor bolt.The used shaped steel of firm banking of the present utility model can be channel-section steel, but angle steel preferably.The hole of the sub-base of fixed insulation slotted hole preferably on the base of the present utility model, the longitudinal axis of slotted hole preferably vertically is arranged vertically with railway, like this can be so that to the adjustment of insulator position.Because firm banking anchor point of the present utility model is 3 to 4 points, so its face of being fixed as in the tunnel fixes, and its stability and rigidity are better than prior art.Be fixed with insulator foot on the insulator of the present utility model, and insulator be fixed on the firm banking by insulator foot.This mode can be simplified the installation of insulator, also can improve the coupling stiffness between insulator and firm banking simultaneously.
The connection buttress bracing struts in the utility model device and the wire clamp of insulator have two kinds, and a kind of is the mid-mounting wire clamp, and another kind is a central anchor solidus folder.These two kinds of wire clamps are placed the groove of buttress bracing struts π shape crosspiece by which is provided with of two symmetries and are positioned at the hold assembly of the fixed bolt hole of this groove top, be connected screw with being arranged in two hold assemblies, to have, part is the alignment connector that is connected with insulator of being used for of tee-section, and the bolt that alignment connector and two hold assemblies are fixed as one is constituted.Mid-mounting wire clamp of the present utility model can be done axial moving relative to wire clamp by the buttress bracing struts of its constraint after two hold assemblies and alignment connector are screwed.Central anchor solidus folder of the present utility model is basic identical with the mid-mounting wire clamp, is used for itself and buttress bracing struts are anchored fixing bolt hole mutually but also be provided with below its translot.Because mid-mounting wire clamp of the present utility model can allow the relative wire clamp of beam to do axial displacement when fixing buttress bracing struts, this is the installation of convenient beam both, also can solve the beam expanded by heating or meet the problem of cold contraction; Central anchor solidus folder then can utilize bolt of rear end plate provided thereon that beam and wire clamp is locked fixing.
Be provided with a plastic mattress between wire clamp of the present utility model and buttress bracing struts; this plastic mattress both can be protected buttress bracing struts, and the surface tear that causes when preventing because of installation can play the effect that reduces friction between wire clamp and beam again; be convenient to beam play in wire clamp, the influence that overcoming expands with heat and contract with cold brings.
Be provided with a grommet that has flange between the insulator connecting bore of alignment connector of the present utility model and insulator tie bolt, the thickness of this grommet is slightly larger than the thickness of alignment connector and insulator connection.In installing condition, under the mutual action between insulator tie bolt and insulator, this grommet is fixed on the insulator, and wire clamp " is mentioned " securely fixing by the flange of grommet, can make the wire clamp rotational of insulator relatively at stationary state simultaneously, so just can make things convenient for Unit Installation and maintenance greatly, more can satisfy the needs of crooked circuit under the different condition.
The used buttress bracing struts of the utility model is similar to the product of Switzerland " F+F " company, is that several sections buttress bracing strutss are fixed as a buttress bracing struts with the interlocking joint in concrete application, and the two ends of every buttress bracing struts are provided with 1 meter～2 meters the upwards transition curve of warpage.Adopt the warp architecture at every beam two ends can make the motorcycle pantograph of motion steadily be subjected to electricity, wall is exempted from the collision of buttress bracing struts end to motorcycle pantograph, also can ensure the safety of buttress bracing struts simultaneously.
Buttress bracing struts of the present utility model interconnects the interlocking joint of employing for respectively having a steel plate and an aluminium sheet that has screw in tie bolt hole.Adopting this structure both can make has higher Joint strenght between each Duan Liang, simultaneously because of having adopted aluminium, the current capacity of interlocking joint is improved.
The interlocking joint that buttress bracing struts perhaps of the present utility model interconnects employing adopt have imbed nut steel plate, particularly can adopt the nut of imbedding of aluminium matter, this structure both can reduce greatly the to interlock weight of joint can strengthen screw place ampacity simultaneously.
The utility model has following advantage:
1, suspension gear of the present utility model and the hang that adopted have higher reliability and stability, can adapt to the needs of express locomotive operation;
2, two kinds of wire clamp structures of the present utility model are comparatively simple, effect is good, installation and maintenance are also very convenient, particularly the mid-mounting wire clamp and be located at beam and wire clamp between plastic mattress, can allow to be fixed in the free play of buttress bracing struts wherein, in conjunction with corresponding hang, the utility model can solve the problem that beam expands with heat and contract with cold effectively;
3, interlocking joint of the present utility model both can connect each Duan Liang securely, can satisfy the requirement that transmits electric power again, and its weight is relatively low;
4, adopt the transition curve that the warpage that makes progress is set at the two ends of beam, this warp architecture at every beam two ends can make the motorcycle pantograph in the motion steadily be subjected to electricity, and wall is exempted from the collision of buttress bracing struts end to motorcycle pantograph, also can ensure the safety of buttress bracing struts simultaneously.
Description of drawings
Accompanying drawing 1 is the buttress bracing struts suspension gear that Switzerland " F+F " company adopts; The outstanding device of buttress bracing struts that accompanying drawing 2 adopts for subway; Accompanying drawing 3 is a firm banking front view of the present utility model; Accompanying drawing 4 is that the A-A of Fig. 3 is to section-drawing; Fig. 5 is that Fig. 3 B-B is to section-drawing; Accompanying drawing 6 is mid-mounting wire clamp and insulator, buttress bracing struts connection diagram; Accompanying drawing 7 is the left view of Fig. 6; Accompanying drawing 8 is that the A-A of Fig. 6 is to cutaway view; Accompanying drawing 9 is anchoring wire clamp and buttress bracing struts, insulator connection diagram; Accompanying drawing 10 is the left view of Fig. 9; Accompanying drawing 11 is Fig. 9 A-A position cutaway view; Accompanying drawing 12 is interlocking joint and buttress bracing struts bonded assembly scheme drawing, and it is equivalent in the accompanying drawing 13 A-A to cutaway view; Accompanying drawing 13 is connected cross-sectional schematic for the interlocking joint with buttress bracing struts; Accompanying drawing 14 is the end situation signal of beam.
The specific embodiment
Firm banking of the present utility model is seen Fig. 3, and it is to be welded by shaped steel 1a, the 1b of two groups of dihedrals and 2a, 2b, and wherein 1a and 1b flanging make progress, and 2a and 2b flanging are downward, referring to Fig. 4 and Fig. 5.Four screws 3 are arranged respectively on angle steel 1a and 1b, be used for matching, base is fixed on the tunnel roof with anchor bolt.On angle steel 2a and 2b, respectively have a slotted hole 4 respectively, be used for the sub-connecting panel of fixed insulation is fixed in base.Dashed rectangle 5 in Fig. 3 is the insulator foot of fixed insulation, 4 bolts hole 6 that are connected with insulator are set on it and are used to be fixed in the 2a of firm banking and the overbolt hole 7 on the 2b limit, and, can carry out the position adjustment along vertical (being the transverse direction of railway) of connecting panel 5 easily owing to be provided with slotted hole 7.
Mid-mounting wire clamp of the present utility model is connected referring to accompanying drawing 6, accompanying drawing 7 and accompanying drawing 8 with insulator, buttress bracing struts.Mid-mounting wire clamp 12 wherein is made up of two symmetrical hold assembly 12a and 12b and appurtenances.On hold assembly 12a and 12b, respectively be provided with the groove 16 of the π shape crosspiece of placing buttress bracing struts 15.Under confined state, the liner 17 of 15 pads of groove 16 and buttress bracing struts plastics.According to the requirement of using, at bolt 13 with two hold assembly 12a and 12b, and after alignment connector 11 is fixed as one, place the beams 15 in the groove 16 can be along the longitudinal leap of groove, when set plastic mattress 17 both can prevent to install with the surface tear of buttress bracing struts, can reduce the friction of 16 of beam and grooves again, make its easier relative displacement of doing.Above groove 16, be useful on the bolt hole 13 of fixing two hold assemblies and alignment connector 11.Is tee-section from the visible alignment connector 11 of Fig. 8 with the part that hold assembly 12a is connected with 12b, and between the two tee-sections part of alignment connector 11 hole that grommet 10 and tie bolt 18 are set is arranged.With bolt 18 that grommet 10 is fixing under confined state, because the height of grommet 10 will be a bit larger tham the thickness of alignment connector 11, general big approximately 5 to 10 millimeters, only be that grommet 10 is fixing by going to the bottom of bolt 18 and insulator 9 when the mount state, therefore wire clamp then " is mentioned " by the flange of grommet 10, alignment connector 11 rotational of insulator relatively still under stationary state.Can make things convenient for Unit Installation and maintenance like this.
Anchoring wire clamp of the present utility model and it were illustrated referring to accompanying drawing 9, accompanying drawing 10 and accompanying drawing 11 with being connected of buttress bracing struts, insulator.The first half of anchoring wire clamp 20 and alignment connector 11 are identical with mid-mounting wire clamp 12 substantially, but be provided with two bolts hole 22 that are used for anchoring buttress bracing struts 15 below the groove 16 of anchoring wire clamp 20, the position in hole 22 preferably is positioned on the axes of inertia of buttress bracing struts 15.Pass screw 22 with bolt 21 in actual applications and on buttress bracing struts 15 set fixed orifice, and cooperate and buttress bracing struts and 20 of anchoring wire clamps can be interfixed with special nut 23 in placing buttress bracing struts 15.
In the utility model each section buttress bracing struts being connected and fixed the interlocking joint that is adopted can be a steel plate that has screw, because the interlocking joint not only will connect as one two sections beams, but also to guarantee two sections conductions between beam, test and calculating according to reality show as adopting a block plate as the interlocking joint, for making it that enough current-carrying cross sections be arranged, particularly will guarantee has enough current-carrying sectional areas at the screw place, its thickness is bigger, therefore cause its weight bigger, this all is disadvantageous for construction and structure.Therefore the utility model suggestion is adopted a steel plate and aluminium sheet combination conduct interlocking joint that has screw that is provided with the tie bolt hole, by the satisfactory electrical conductivity assurance conduction of aluminium sheet, guarantees bonded assembly rigidity and intensity by steel plate.
Be the plurality of sections buttress bracing struts to be linked together with the interlocking joint become " beam " in actual applications, use with suspension gear is fixing again.The structure that used interlocking joint preferably uses accompanying drawing 12 and Figure 13 to provide.Accompanying drawing 12 is to be equivalent to A-A from accompanying drawing 13 to cutaway view.Accompanying drawing 12 provides is the structure of interlocking joint best in the utility model, and interlocking joint 24 is made of a steel plate 27 and the screw 25 interior nuts 28 of imbedding that are embedded in steel plate 27 respectively.Because it is bigger to imbed the thickness of nut 28, be equivalent to increase the sectional area of screw, also just guaranteed this place's current-carrying area requirements, obviously this structure only is to add in the local area to imbed nut, so its weight is less.The utility model suggestion is adopted imbeds nut 28 and preferably uses alumina based material, and the weight that can make the interlocking joint like this is for minimum.
When buttress bracing struts is set the length that requires to determine every buttress bracing struts according to relevant rules.The length of general every beam is to be connected into nearly 34 sections 6 meters long beam segmentation in the reality about 200 meters, basically hitch point of every section beam employing.Each buttress bracing struts in the utility model in the tunnel is to arrange with the angle of circuit axis 0.05～0.13 degree, referring to accompanying drawing 14, and in every beam, appoint get a hitch point with anchoring wire clamp 20 with beam in this anchoring, and remaining each hitch point all adopts mid-mounting wire clamp 12.Like this, every beam is heated or meets and coldly expands or when shrinking, except that anchoring wire clamp place is restrained, do the play of relative wire clamp at all the other each Liang Junke of hitch point place.The utility model suggestion is adopted the anchoring wire clamp at the mid point of every beam, and referring to the point of the D in the accompanying drawing 14, all can move freely in the two ends of beam like this, overcoming the problem that beam expands with heat and contract with cold and brings, and the effect of the best can be arranged.
The fixation case of every each end of buttress bracing struts of the present utility model is referring to accompanying drawing 14.The a bit of upwards transition curve of warpage is arranged in the end of beam as seen from the figure, and this section transition curve is raised 50 to 150 millimeters with the end of beam, and its length is at 1 meter～2 meters.This upwards transition curve of warpage can make the motorcycle pantograph in the motion steadily be subjected to electricity in the end of every beam, and wall is exempted from the collision of buttress bracing struts end to motorcycle pantograph, also can ensure the safety of buttress bracing struts simultaneously.
Claims (7)
1, the suspension gear of electric railway rigid contact net, comprise the buttress bracing struts that has π shape structure, the interlocking joint that connects each section buttress bracing struts, buttress bracing struts is fixed in wire clamp on the insulator, insulator, firm banking, the insulator connecting panel of fixed insulation on firm banking, it is characterized in that firm banking is by orthogonal four rectangular configuration that shaped steel is welded in same plane, shaped steel wherein has two orthogonal limits at least, on the shaped steel of end Cuo, be provided with the hole of matching with anchor bolt, on another group shaped steel, be provided with the hole of the sub-base of fixed insulation, on insulator, be fixed with insulator foot, and insulator be fixed on the firm banking by insulator foot.
2, suspension gear according to claim 1, the wire clamp that it is characterized in that connecting buttress bracing struts and insulator has two kinds of mid-mounting wire clamp and anchoring wire clamps, these two kinds of wire clamps are placed the groove of buttress bracing struts π shape crosspiece by which is provided with of two symmetries, be positioned at the hold assembly of the fixed bolt hole of this groove top, be connected screw with being arranged in two hold assemblies, to have, part is the alignment connector that is connected with insulator of being used for of tee-section, and the bolt that alignment connector and two hold assemblies are fixed as one constituted, after two hold assemblies and alignment connector are screwed, can be done axial moving relative to wire clamp by the buttress bracing struts of its constraint, anchor line wherein is clipped in translot below and also is provided with and is used for bolt hole that itself and buttress bracing struts are interfixed.
3, suspension gear according to claim 2 is characterized in that being provided with between wire clamp and buttress bracing struts a plastic mattress.
4, suspension gear according to claim 3 is characterized in that being provided with a grommet that has flange between the insulator connecting bore of alignment connector and insulator tie bolt, and the height of this grommet is slightly larger than the thickness of alignment connector and insulator connection.
5, suspension gear according to claim 4, it is characterized in that being fixed as a buttress bracing struts with the interlocking joint by several sections buttress bracing strutss, and the two ends of every buttress bracing struts are provided with raises 50 to 150 millimeters with the end, and length is at the transition curve of 1 meter～2 meters the warpage that makes progress.
6, suspension gear according to claim 5, the joint that it is characterized in that interlocking is for being with a steel plate and aluminium sheet that has screw that the tie bolt hole is respectively arranged.
7, suspension gear according to claim 5, the joint that it is characterized in that interlocking be a band on it imbed nut steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03262613 CN2659766Y (en) | 2003-07-29 | 2003-07-29 | Suspension gear of railway rigid contact net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03262613 CN2659766Y (en) | 2003-07-29 | 2003-07-29 | Suspension gear of railway rigid contact net |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2659766Y true CN2659766Y (en) | 2004-12-01 |
Family
ID=34329378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03262613 Expired - Lifetime CN2659766Y (en) | 2003-07-29 | 2003-07-29 | Suspension gear of railway rigid contact net |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2659766Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100333949C (en) * | 2003-07-29 | 2007-08-29 | 铁道第一勘察设计院 | Suspension apparatus and method for electric railway rigid contact net |
| CN102951041A (en) * | 2011-08-22 | 2013-03-06 | 陈海水 | Anti-tailgating disconnection type dual protection method for electric trains |
| CN103192740A (en) * | 2013-04-18 | 2013-07-10 | 中铁第一勘察设计院集团有限公司 | Rigid movable overhead line system below electrified railway coal hopper bunker |
| CN104908612A (en) * | 2015-06-19 | 2015-09-16 | 中铁电气化局集团有限公司 | Rigid suspension system device for overhead contact line |
| CN105095598A (en) * | 2015-08-28 | 2015-11-25 | 中铁第一勘察设计院集团有限公司 | Construction method for graphic design drawing of overhead rigid catenary of metro |
| CN106114289A (en) * | 2016-08-30 | 2016-11-16 | 宝鸡保德利电气设备有限责任公司 | Applied to high-speed railway touching net registration clamp device |
| CN106340835A (en) * | 2016-08-30 | 2017-01-18 | 李健 | High-speed-rail electrical contact wire repairing device and repairing method using graphene mixed liquor |
| CN112067630A (en) * | 2020-11-11 | 2020-12-11 | 成都中轨轨道设备有限公司 | Intelligent detection system and method for contact net suspension device |
| CN114212006A (en) * | 2021-11-11 | 2022-03-22 | 中铁电气化勘测设计研究院有限公司 | Rigid suspension integral type central anchoring device |
-
2003
- 2003-07-29 CN CN 03262613 patent/CN2659766Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100333949C (en) * | 2003-07-29 | 2007-08-29 | 铁道第一勘察设计院 | Suspension apparatus and method for electric railway rigid contact net |
| CN102951041A (en) * | 2011-08-22 | 2013-03-06 | 陈海水 | Anti-tailgating disconnection type dual protection method for electric trains |
| CN102951041B (en) * | 2011-08-22 | 2015-09-09 | 陈海水 | The anti-disconnect type double protection method that knocks into the back of electric train |
| CN103192740A (en) * | 2013-04-18 | 2013-07-10 | 中铁第一勘察设计院集团有限公司 | Rigid movable overhead line system below electrified railway coal hopper bunker |
| CN104908612A (en) * | 2015-06-19 | 2015-09-16 | 中铁电气化局集团有限公司 | Rigid suspension system device for overhead contact line |
| CN105095598B (en) * | 2015-08-28 | 2018-03-16 | 中铁第一勘察设计院集团有限公司 | The construction method of subway overheat rigid contact network plane design drawing |
| CN105095598A (en) * | 2015-08-28 | 2015-11-25 | 中铁第一勘察设计院集团有限公司 | Construction method for graphic design drawing of overhead rigid catenary of metro |
| CN106114289A (en) * | 2016-08-30 | 2016-11-16 | 宝鸡保德利电气设备有限责任公司 | Applied to high-speed railway touching net registration clamp device |
| CN106340835A (en) * | 2016-08-30 | 2017-01-18 | 李健 | High-speed-rail electrical contact wire repairing device and repairing method using graphene mixed liquor |
| CN106340835B (en) * | 2016-08-30 | 2018-02-16 | 李健 | A kind of high ferro electrical contact line prosthetic device and the restorative procedure carried out using graphene mixed liquor |
| CN112067630A (en) * | 2020-11-11 | 2020-12-11 | 成都中轨轨道设备有限公司 | Intelligent detection system and method for contact net suspension device |
| CN112067630B (en) * | 2020-11-11 | 2021-01-26 | 成都中轨轨道设备有限公司 | Intelligent detection system and method for contact net suspension device |
| CN114212006A (en) * | 2021-11-11 | 2022-03-22 | 中铁电气化勘测设计研究院有限公司 | Rigid suspension integral type central anchoring device |
| CN114212006B (en) * | 2021-11-11 | 2024-04-05 | 中铁电气化勘测设计研究院有限公司 | Rigid suspension integral type central anchoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20030729 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |