CN201633112U - Easement curve type rear prestressed longitudinally-connected track slab die - Google Patents
Easement curve type rear prestressed longitudinally-connected track slab die Download PDFInfo
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- CN201633112U CN201633112U CN2009202921212U CN200920292121U CN201633112U CN 201633112 U CN201633112 U CN 201633112U CN 2009202921212 U CN2009202921212 U CN 2009202921212U CN 200920292121 U CN200920292121 U CN 200920292121U CN 201633112 U CN201633112 U CN 201633112U
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- plate
- support groove
- rail support
- longitudinally
- easement curve
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Abstract
The utility model discloses an easement curve type rear prestressed longitudinally-connected track slab die, belonging to the technical field of cushion cap type track slab dies and comprising a bottom die, side dies which are detachably connected with two sides of the bottom die and end dies which are detachably connected with two ends of the bottom die, wherein the side bottoms are detachably connected with the end dies; an inner cavity of a space body formed by assembling the bottom die, the side dies and the end dies is matched with a longitudinally-connected track slab in the external shape; and two rows of bidirectional adjustable bearing rail bearing groove dies are detachably connected at the position of the bottom die, which corresponds to two rows of cushion caps of the longitudinally-connected track slab. The utility model can adjust a rail bearing groove frame according to the requirement so as to meet the requirement that the positions of the cushion caps on the easement curve type track slab are required to be adjusted according to the curve of a circuit, can prevent a track slab end from being broken due to the subgrade settlement and is especially suitable for manufacturing a track slab on the easement curve section of high speed railway.
Description
Technical field
The utility model relates to a kind of railway plate die, especially relates to a kind of lengthways-connection type railway plate mould.
Background technology
Rail support groove on the existing desk bearing railway plate mold and bed die are integrative-structures, this structure is feasible for linear pattern track plate, but just no longer suitable for the circular curve type of inter-city high-speed rail upper curve section and easement curve type track plate.The circuit straightway of high-speed railway and the changeover portion between the circular curve segment are called the easement curve section, and the track plate of laying on this easement curve section is called easement curve type track plate; Having crossed the easement curve section is exactly the standard circular segment, and the track plate of laying on this standard circular segment is called circular curve type track plate.Because the curve radian difference of circuit, needed easement curve type track plate is also different, especially the easement curve section requires to heighten outside support rail platform and satisfies superelevation and change the outer rail that causes and raise, therefore, the position of the support rail platform on the track plate will change thereupon, therefore need a lot of heterotypic rail guidance tapes, but all need to make separately respective track template die plate for the heterotypic rail guidance tape, also have to adopt and carry out above on-the-spot as required processing track plate behind the track plate of super wide cushion cap, these two kinds of method costs are all very high, and work efficiency is extremely low.
There is not longitudinal connection type track slab end die groove shaped device on the existing lengthways-connection type railway plate mould end mould, though can reaching ballastless track, the longitudinal-connecting type track slab that this mould is made gets on the right track vertical connection between plate and the track plate, but owing to be not the connection of longitudinal prestressing reinforcing bar between the track plate, therefore, can not carry out prestressing force to the line track plate longitudinal prestressing reinforcing bar after connecting applies, just can not adopt the post stretching of deformed bar to carry out stretch-draw, especially for the inhomogeneous location of subgrade settlement, cause the longitudinal-connecting type track slab part unsettled probably, under alternate stress the effect to track plate end of train wheel to formation, the end of longitudinal-connecting type track slab is very easily fractureed, " nodding " phenomenon of the track plate end of often saying just, thus the damage of track caused.
The utility model content
The purpose of this utility model is: provide a kind of rail supporting groove mould according to the linear needs of real space along track plate bed die width and short transverse adjustment, and can guarantee longitudinal-connecting type track slab shear stress on the roadbed effective transmission, be distributed on the adjacent track plate, effectively reduce and transmit train wheel, prevent the easement curve type post-tensioned prestressing longitudinally-connected track board mold that track plate end is fractureed the effect of the alternate stress that forms to track plate end.
The technical solution of the utility model is: a kind of easement curve type post-tensioned prestressing longitudinally-connected track board mold, comprise bed die and the side form that is detachably connected on the bed die both sides, and the end mould that is detachably connected on the bed die two ends, the side form end mould that removably connects, and bed die, the space body inner chamber that side form and end mould assembling back form and the outer shape of longitudinal connected track plate are complementary, two row's cushion cap positions corresponding to the longitudinal connected track plate on the described bed die are removably connected with bidirectional adjustable rail supporting groove mould, the rail support groove frame that described bidirectional adjustable rail supporting groove mould comprises the rail support groove core and is connected in the rail support groove core outside, the cavity shape of described rail support groove core and track plate have the shape of shoulder block cushion cap to be complementary, described rail support groove core is provided with a pair of and the corresponding installing hole of service sleeve on the shoulder block cushion cap is arranged, on the bed die four row installing hole is easement curve and arranges, and every row's installing hole line of centres and orbit centre line parallel, the line of centres of the row of two on every row's rail support groove core installing hole is the rail center line, the rail support groove core with have the corresponding position of shoulder block cushion cap table top to be provided with 1: 38～1: 42 rail cant, described rail support groove frame side plate is connected with to regulate bolt and will regulate bolt and lock onto locking nut on the railway plate die, described rail support groove core bottom is connected with height adjustment bolt and will regulates bolt and lock onto locking nut on the rail support groove frame bottom plate, the axis of described horizontal adjustment bolt parallels or overlaps with the line of centres of described a pair of installing hole, and the cover pipe fixing device is installed on the described installing hole.
Rail support groove core described in the utility model has the shoulder block cushion cap suitable with the track plate.Cushion cap position on the easement curve track plate is different and different according to the radian of easement curve circuit, the utility model adopts a cover railway plate die, rail support groove on the track plate bed die can be debugged along bed die width level, also can debug along short transverse, can produce the track plate of corresponding cushion cap position as required, require to heighten outside support rail platform and satisfy superelevation and change the needs that the outer rail that causes is raised to satisfy the easement curve section.
Described rail support groove upper frame edge frame is provided with some countersunk head screws.The rail support groove frame is convenient to plane levelling on the rail support groove upper frame edge frame with after bed die is connected with dormant bolt, and this structure makes the connecting bolt between rail support groove frame and the bed die install more convenient.
Described rail support groove upper frame edge frame is provided with some tapped blind holes, and the aperture is positioned at the bottom surface of rail support groove upper frame edge frame.Bolt passes bed die from the below screw is connected with the tapped blind hole of rail support groove frame, and operation has been omitted in the last plane levelling again of this structure rail support groove upper frame edge frame, but the connecting bolt between rail support groove frame and the bed die is installed comparatively inconvenience.
Described end mould is provided with the projection that is used for the moulding of longitudinal-connecting type track slab end recesses, on the projection of described end mould shear device is housed, this shear device comprises connecting plate, connecting plate one side is fixed with embedded bar, the connecting plate opposite side is fixed with shear plate, wherein, described connecting plate and track plate end mould removably connect, and the projection that described shear plate passes the end mould stretches out in end mould outside; Described shear plate one side at least is provided with tooth, and the teeth groove direction of described tooth is vertical with connecting plate, also is provided with at least one connecting hole on the described shear plate.
Described connecting plate is provided with screwed hole, and described connecting plate passes this screwed hole by connecting bolt and is connected with track plate end mould.Be convenient to be connected by connecting bolt between connecting plate and the track plate end mould.
Described embedded bar is a U shaped steel muscle, make be connected between embedded bar and the track board concrete more firm.
The end of described U shaped steel muscle is outwardly-bent.This structure has further strengthened the fastness that is connected between embedded bar and the track board concrete.
Described embedded bar is fixed on connecting plate one side with welding manner, and described shear plate is fixed on the connecting plate opposite side with welding manner.Adopt this mode that is connected to make that connection is more reliable.
Described removably connecting adopts bolt or taper pin to connect.That is to say between bed die and the end mould, between bed die and the side form, removably connecting between side form and the end mould and between bed die and the integral type rail support groove can adopt bolt to be connected, and also can adopt the taper pin connection.
Between described bed die and the end mould, be provided with transverse-moving mechanism between bed die and the side form; Described transverse-moving mechanism comprises the carriage that is installed on the bed die; level is equipped with at least two rollers on the carriage; being abutted against on the described roller has the folding axle; folding axle one end is connected with end mould or side form by brace; the folding axle other end is a free end, also is provided with roof pressure at least one roller in folding axle top on the carriage.Transverse-moving mechanism is to be convenient to side form or the installation of end mould and the demoulding.
The beneficial effects of the utility model are: can adjust rail support groove frame and rail support groove core as required, to adapt to the requirement that the cushion cap position of easement curve type track plate requirement on it adjusted according to the curve of circuit, easy to adjust, simple in structure, greatly reduce the manufacturing cost of special-shaped easement curve track plate, work efficiency significantly is provided; Can make the longitudinal-connecting type track slab that has shear device easily; This track plate can guarantee longitudinal-connecting type track slab shear stress on the roadbed effective transmission, be distributed on the adjacent track plate, effectively reduce train wheel to the effect of the alternate stress that forms to track plate end, prevent to be fractureed because of subgrade settlement causes track plate end; When variations in temperature occurring, when longitudinal-connecting type track slab expanded with heat and contract with cold, because of the tooth that engagement is vertically arranged of the shear plate of adjacent longitudinal-connecting type track slab, this tooth can slide along the teeth groove direction, thereby guaranteed the reliability that connects between the track plate.
Below in conjunction with the drawings and specific embodiments the utility model is further specified.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the left view of Fig. 1;
Fig. 4 is the structural representation of bed die among Fig. 1;
Fig. 5 is the vertical view of Fig. 4;
Fig. 6 is the left view of Fig. 4
Fig. 7 is the structural representation of side form among Fig. 1;
Fig. 8 is the vertical view of Fig. 7;
Fig. 9 is the side view of Fig. 7;
Figure 10 is the structural representation of Fig. 1 middle-end mould;
Figure 11 is the vertical view of Figure 10;
Figure 12 is the left view of Figure 10;
Figure 13 is the perspective view of Figure 10;
Figure 14 is the structural representation of shear device among Figure 10;
Figure 15 is the vertical view of Figure 14;
Figure 16 is the A-A partial sectional view of Figure 14;
Figure 17 is the structural representation of bidirectional adjustable rail supporting groove mould among Fig. 1;
Figure 18 is the vertical view of Figure 17;
Figure 19 is the A-A cutaway view of Figure 17;
Figure 20 is the perspective view of Figure 17
Figure 21 is the perspective view of transverse-moving mechanism among Fig. 1;
Wherein, Reference numeral is: 1 is bed die, and 2 is side form, 3 are the end mould, and 4 is bidirectional adjustable rail supporting groove mould, and 4-1 is the rail support groove core, 4-2 is the rail support groove frame, and 4-3 is an installing hole, and 4-21 is a rail support groove frame side plate, 4-22 is the rail support groove frame bottom plate, and 4-4 is a horizontal adjustment bolt, and 4-5 is a locking nut, 4-6 is a height adjustment bolt, and 4-7 is a locking nut, and 4-8 is the countersunk head screw, 4-9 is a rail cant, and 4-10 is the cover pipe fixing device, and 5 is projection, 5-1 is a connecting plate, and 5-2 is an embedded bar, and 5-3 is a shear plate, 5-4 is a connecting hole, and 5-5 is an installing hole, and 5-6 is a tooth, 5-61 is a teeth groove, and 5-62 is a tooth top, and 7 is transverse-moving mechanism, 7-1 is a carriage, 7-2 is a roller, and 7-3 is the folding axle, and 7-4 is a brace, 7-5 is a bearing pin, and 7-6 is split pin.
The specific embodiment
Preferred embodiment
Shown in Fig. 1-9, a kind of easement curve type post-tensioned prestressing longitudinally-connected track board mold, comprise bed die 1 and be connected the side form 2 of bed die 1 both sides by bolt 6, bed die 1 two ends are connected with end mould 3 by bolt, connect by bolt between side form 2 and the end mould 3, and the space body inner chamber that bed die 1, side form 2 and end mould 3 assembling backs form and the outer shape of longitudinal connected track plate are complementary, and two row's cushion cap positions corresponding to the longitudinal connected track plate on the described bed die 1 are connected with two row's bidirectional adjustable rail supporting groove moulds 4 by bolt 6.
Shown in Figure 17-20, the rail support groove frame 4-2 that described bidirectional adjustable rail supporting groove mould 4 comprises rail support groove core 4-1 and is connected in the rail support groove core 4-1 outside, the cavity shape of described rail support groove core 4-1 and track plate have the shape of shoulder block cushion cap to be complementary, described rail support groove core 4-1 is provided with a pair of and the corresponding installing hole 4-3 of service sleeve on the shoulder block cushion cap is arranged, on the bed die 1 four row installing hole 4-3 is easement curve and arranges, and every row's installing hole 4-3 line of centres and orbit centre line parallel, the line of centres of on every row's rail support groove core 4-1 two row installing hole 4-3 is the rail center line, rail support groove core 4-1 with have the corresponding position of shoulder block cushion cap table top to be provided with 1: 38～1: 42 rail cant 4-9, described rail support groove frame 4-2 side plate is connected with to regulate bolt 4-4 and will regulate bolt 4-4 and lock onto locking nut 4-5 on the railway plate die, prevent that horizontal adjustment bolt from producing in the track plate process influence of vibrations to its precision after adjustment is finished, after adjustment was finished, locking nut reached the purpose of self-locking.Described rail support groove core 4-1 bottom is connected with height adjustment bolt 4-6 and will regulates bolt 4-6 and lock onto locking nut 4-7 on the rail support groove frame 4-2 base plate, prevent that height adjustment bolt from producing in the track plate process influence of vibrations to its precision after adjustment is finished, after adjustment was finished, locking nut reached the purpose of self-locking.The axis of described horizontal adjustment bolt 4-4 parallels or overlaps with the line of centres of described a pair of installing hole 4-3, cover pipe fixing device 4-10 is installed on the described installing hole 4-3, because want service sleeve so that rail to be installed on the track plate cushion cap, the cover pipe fixing device that is used for fixing sleeve pipe be installed on the installing hole.
Described rail support groove core 4-1 upper side frame is provided with some countersunk head screw 4-8, and this countersunk head screw 4-8 is connected the rail support groove frame by dormant bolt with track plate bed die.The rail support groove core is convenient to plane levelling on the rail support groove core upper side frame with after bed die is connected with dormant bolt, and this structure makes the connecting bolt between rail support groove core and the bed die install more convenient.
Need to prove: the countersunk head screw of described rail support groove core 4-1 upper side frame also has its substitute mode, and promptly rail support groove core 4-1 upper side frame is provided with some tapped blind holes, and the aperture is positioned at the bottom surface of rail support groove core 4-1 upper side frame.The using method of present embodiment bidirectional adjustable rail supporting groove mould 4 is as follows: after the described bidirectional adjustable rail supporting groove mould of present embodiment is installed on the track plate bed die corresponding reserved location, by adjusting horizontal adjustment bolt, adjust the position of rail support groove frame and rail support groove core width on bed die, after adjusting, be locked on the bed die by locking nut.By adjusting height adjustment bolt, adjust the position of rail support groove core in short transverse; Realize the track plate of a cover railway plate die making diverse location cushion cap requirement so very easily, saved track plate manufacturing cost greatly.
Shown in Figure 10-16, described end mould 3 is provided with the projection 5 that is used for the moulding of longitudinal-connecting type track slab end recesses, on the projection 5 of described end mould 3 shear device is housed, this shear device comprises connecting plate 5-1, connecting plate 5-1 one side is fixed with embedded bar 5-2 with welding manner, and connecting plate 5-1 opposite side is fixed with shear plate 5-3 with welding manner, wherein, described connecting plate 5-1 and track plate end mould 3 are connected by bolt, and the projection 5 that described shear plate 5-3 passes end mould 3 stretches out in end mould 3 outsides; Described shear plate 5-3 simultaneously is provided with tooth 5-6, the teeth groove direction of described tooth 5-6 is vertical with connecting plate 5-1, the teeth groove 5-61 of tooth 5-6 is a V-type, tooth top 5-62 is the plane, the V-type groove is convenient to processing and teeth groove is meshing with each other, and tooth top is that planar structure is concentrated in order to prevent stress, also is provided with two connecting hole 5-4 on the described shear plate 5-3, for the ease of regulating, this connecting hole adopts bar hole.Described connecting plate 5-1 is provided with screwed hole 5-5, and described connecting plate 5-1 passes this screwed hole 5-5 by connecting bolt and is connected with track plate end mould 3.Described embedded bar 5-2 is a U shaped steel muscle, and the end of U shaped steel muscle is outwardly-bent.
As shown in figure 21, between described bed die 1 and the end mould 3, be provided with transverse-moving mechanism 7 between bed die 1 and the side form 2; Described transverse-moving mechanism 7 comprises the carriage 7-1 that is installed on the bed die 1, carriage 7-1 goes up level two roller 7-2 is housed, be abutted against on the described roller folding axle 7-3 is arranged, folding axle 7-3 one end is connected with end mould 3 or side form 2 by brace 7-4, the folding axle 7-3 other end is a free end, also is provided with the roller 7-2 of roof pressure in folding axle 7-3 top on the carriage 7-1.Just folding axle 7-3 below has two horizontal rollers to support, and there is a roller roof pressure top, realizes side form and the installation and the demoulding of holding mould by splitting the sympodium 7-3 free end application of force.Described roller 7-2 is connected on the carriage 7-1 by bearing pin 7-5, and bearing pin 7-5 locks by split pin 7-6.
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. easement curve type post-tensioned prestressing longitudinally-connected track board mold, comprise bed die (1) and be detachably connected on the side form (2) of bed die (1) both sides, and the end mould (3) that is detachably connected on bed die (1) two ends, side form (2) removably connects and holds mould (3), and bed die (1), the space body inner chamber that side form (2) and end mould (3) assembling back form and the outer shape of longitudinal connected track plate are complementary, it is characterized in that: two row's cushion cap positions that described bed die (1) is gone up corresponding to the longitudinal connected track plate are removably connected with bidirectional adjustable rail supporting groove mould (4), the rail support groove frame (4-2) that described bidirectional adjustable rail supporting groove mould (4) comprises rail support groove core (4-1) and is connected in rail support groove core (4-1) outside, the cavity shape of described rail support groove core (4-1) and track plate have the shape of shoulder block cushion cap to be complementary, described rail support groove core (4-1) is provided with a pair of and the corresponding installing hole of service sleeve (4-3) on the shoulder block cushion cap is arranged, on the bed die (1) four row's installing hole (4-3) is easement curve and arranges, and every row's installing hole (4-3) line of centres and orbit centre line parallel, the line of centres of the row's installing hole of two on every row's rail support groove core (4-1) (4-3) is the rail center line, rail support groove core (4-1) with have the corresponding position of shoulder block cushion cap table top to be provided with 1: 38～1: 42 rail cant (4-9), described rail support groove frame (4-2) side plate is connected with to regulate bolt (4-4) and will regulate bolt (4-4) and lock onto locking nut (4-5) on the railway plate die, described rail support groove core (4-1) bottom is connected with height adjustment bolt (4-6) and will regulates bolt (4-6) and lock onto locking nut (4-7) on rail support groove frame (4-2) base plate, the axis of described horizontal adjustment bolt (4-4) parallels or overlaps with the line of centres of described a pair of installing hole (4-3), on the described installing hole (4-3) the cover pipe fixing device is installed.
2. a kind of easement curve type post-tensioned prestressing longitudinally-connected track board mold according to claim 1, it is characterized in that: described rail support groove core (4-1) upper side frame is provided with some countersunk head screws (4-8).
3. a kind of easement curve type post-tensioned prestressing longitudinally-connected track board mold according to claim 1, it is characterized in that: described rail support groove core (4-1) upper side frame is provided with some tapped blind holes, and the aperture is positioned at the bottom surface of rail support groove frame (4-1) upper side frame.
4. according to claim 1 or 2 or 3 described a kind of easement curve type post-tensioned prestressing longitudinally-connected track board molds, it is characterized in that: described end mould (3) is provided with the projection (5) that is used for the moulding of longitudinal-connecting type track slab end recesses, on the projection (5) of described end mould (3) shear device is housed, this shear device comprises connecting plate (5-1), connecting plate (5-1) side is fixed with embedded bar (5-2), connecting plate (5-1) opposite side is fixed with shear plate (5-3), wherein, described connecting plate (5-1) removably connects with track plate end mould (3), and the projection (5) that described shear plate (5-3) passes end mould (3) stretches out in end mould (3) outside; Described shear plate (5-3) one side at least is provided with tooth (5-6), and the teeth groove direction of described tooth (5-6) is vertical with connecting plate (5-1), also is provided with at least one connecting hole (5-4) on the described shear plate (5-3).
5. a kind of easement curve type post-tensioned prestressing longitudinally-connected track board mold according to claim 4, it is characterized in that: described connecting plate (5-1) is provided with screwed hole (5-5), and described connecting plate (5-1) passes this screwed hole (5-5) by connecting bolt and is connected with track plate end mould (3).
6. a kind of easement curve type post-tensioned prestressing longitudinally-connected track board mold according to claim 5, it is characterized in that: described embedded bar (5-2) is a U shaped steel muscle.
7. a kind of easement curve type post-tensioned prestressing longitudinally-connected track board mold according to claim 6, it is characterized in that: the end of described U shaped steel muscle is outwardly-bent.
8. a kind of easement curve type post-tensioned prestressing longitudinally-connected track board mold according to claim 6, it is characterized in that: described embedded bar (5-2) is fixed on connecting plate (5-1) side with welding manner, and described shear plate (5-3) is fixed on connecting plate (5-1) opposite side with welding manner.
9. according to any described a kind of easement curve type post-tensioned prestressing longitudinally-connected track board mold of claim 5 to 8, it is characterized in that: described removably connecting adopts bolt or taper pin to connect.
10. according to any described a kind of easement curve type post-tensioned prestressing longitudinally-connected track board mold of claim 9, it is characterized in that: between described bed die (1) and end mould (3), be provided with transverse-moving mechanism (7) between bed die (1) and the side form (2); Described transverse-moving mechanism (7) comprises the carriage (7-1) that is installed on the bed die (1), carriage (7-1) is gone up level at least two rollers (7-2) is housed, be abutted against on the described roller folding axle (7-3) is arranged, folding axle (7-3) end is connected with end mould (3) or side form (2) by brace (7-4), folding axle (7-3) other end is a free end, also is provided with roof pressure at least one roller (7-2) in folding axle (7-3) top on the carriage (7-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202921212U CN201633112U (en) | 2009-12-31 | 2009-12-31 | Easement curve type rear prestressed longitudinally-connected track slab die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202921212U CN201633112U (en) | 2009-12-31 | 2009-12-31 | Easement curve type rear prestressed longitudinally-connected track slab die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201633112U true CN201633112U (en) | 2010-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202921212U Expired - Lifetime CN201633112U (en) | 2009-12-31 | 2009-12-31 | Easement curve type rear prestressed longitudinally-connected track slab die |
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| CN (1) | CN201633112U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101758548B (en) * | 2009-12-31 | 2012-01-04 | 中铁二十三局集团有限公司 | Easement curve type post-tensioned prestressing longitudinally-connected track slab mould |
-
2009
- 2009-12-31 CN CN2009202921212U patent/CN201633112U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101758548B (en) * | 2009-12-31 | 2012-01-04 | 中铁二十三局集团有限公司 | Easement curve type post-tensioned prestressing longitudinally-connected track slab mould |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101117 Effective date of abandoning: 20091231 |