CN210715522U - Prestressed elastic strip with constraint structure and rail fastener - Google Patents
Prestressed elastic strip with constraint structure and rail fastener Download PDFInfo
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- CN210715522U CN210715522U CN201921690693.6U CN201921690693U CN210715522U CN 210715522 U CN210715522 U CN 210715522U CN 201921690693 U CN201921690693 U CN 201921690693U CN 210715522 U CN210715522 U CN 210715522U
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- 238000007906 compression Methods 0.000 claims abstract description 10
- 230000000452 restraining effect Effects 0.000 claims description 42
- 238000005452 bending Methods 0.000 claims description 14
- 239000002654 heat shrinkable material Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 32
- 239000010959 steel Substances 0.000 abstract description 32
- 238000010276 construction Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000006835 compression Effects 0.000 abstract description 7
- 238000005056 compaction Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 25
- 229910052742 iron Inorganic materials 0.000 description 13
- 241001669679 Eleotris Species 0.000 description 7
- 238000003825 pressing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
- E01B9/32—Fastening on steel sleepers with clamp members
- E01B9/34—Fastening on steel sleepers with clamp members by resilient steel clips
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/24—Fixing or removing detachable fastening means or accessories thereof; Pre-assembling track components by detachable fastening means
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/64—Rail fastenings gripping or encircling the sleeper
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
- F16B39/26—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object with spring washers fastened to the nut or bolt-head
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Railway Tracks (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The utility model provides a prestressing force bullet strip and track fastener with restraint structure, include by the precompression deformation have prestressing force bullet strip body and with this body coupling of bullet strip and exert the restricted piece of restricted force to bullet strip body, restricted piece pressure prevents at the bullet strip body on having the at least three position of counter compression resistance force bounce-back after the compression of bullet strip body. The utility model discloses, through the bullet strip carry on the restrictive pre-compaction to the specified withholding pressure value when producing, make every bullet strip have equal and meet the design requirement withholding pressure before dispatching from the factory, avoided the inequality phenomenon that leads to because of manufacturing, installation factor when being in service; during construction and installation, the elastic strip is installed at a specified position only by placing, and the installation or the adjustment of the compression degree of the elastic strip on the steel rail or the gauge block by special machines or tools on the spot is not needed.
Description
Technical Field
The utility model belongs to the technical field of the railway fastener, concretely relates to prestressing force bullet strip and track fastener with restraint structure.
Background
The elastic strip is a core part which applies buckling pressure to the steel rail in the rail fastener; the application is more extensive W type and e type elastic strip, install W type elastic strip among the prior art, it is through screwing up the nut downwards to make the flat washer extrude W elastic strip and deform and reach the rebound that forms after the deflection of presetting, push down the rail bottom of pressing the rail, in order to prevent the rail from moving and other parts of fastener are loose, install e type elastic strip on the protruding column structure of installing the jack on the pre-buried iron seat or iron tie plate of sleeper directly, the middle limb of elastic strip penetrates in the mounting hole of the protruding column structure on the pre-buried iron seat or iron tie plate, along the horizontal direction of penetrating pulling elastic strip, make its toe end press on the rail gradually in the course of deforming, heel end is pressed on the pre-buried iron seat. In the existing fastener manufacturing and mounting technology, because the steel rail, the elastic strip, other parts of the fastener, a sleeper rail bearing surface and the like have manufacturing deviation and mounting error, the rebound force generated after the elastic strip is actually deformed, namely the fastener buckling force, has certain difference with the elastic strip rebound force specified in the fastener design, so that the actual fastener buckling force of each node on a line is inconsistent, the elastic strip applying the buckling force has overload or underload condition, the constraint on the steel rail is unbalanced, especially the constraint unbalance of a curve, a bridge and tunnel area and an up-down slope area can seriously affect the smoothness and the vehicle stability of the steel rail, and the early failure (the elastic strip buckling force is reduced, fatigue fracture and fastener displacement) of the fastener (including the elastic strip) can be caused, thereby forming serious threat to the safe operation of rail transportation.
SUMMERY OF THE UTILITY MODEL
In view of the above the not enough of prior art, the utility model aims to provide a prestressing force bullet strip with restraint structure improves bullet strip withholding force's uniformity, avoids different nodes to exist the difference to orbital withholding force.
In order to achieve the above objects and other related objects, the technical solution of the present invention is as follows:
the pre-stressed elastic strip with the constraint structure comprises an elastic strip body which is pre-compressed and deformed and has pre-stress, and constraint pieces which are connected with the elastic strip body and exert constraint force on the elastic strip body, wherein the constraint pieces are pressed on at least three parts of the elastic strip body with counter-compression resistance to prevent the elastic strip body from rebounding after being compressed.
By adopting the structure, the elastic strips are subjected to restrictive pre-pressing to the specified buckling pressure value before leaving the factory, so that each elastic strip has the same buckling pressure which meets the design requirement before leaving the factory, and the phenomenon of inequality caused by manufacturing and installation factors during service is avoided; during construction and installation, the elastic strip is only required to be installed at a specified position, and installation or adjustment of the compaction degree through a special machine or tool is not needed on site; after the fine adjustment of the line is finished, the constraint piece on the elastic strip is removed, so that the elastic strip recovers the rebound force to ensure that the elastic strip applies a specified pressing force to the steel rail or the gauge block, the one-time installation is in place, the consistency of the buckling force of the elastic strip at each node is improved, and the installation technical requirement and the labor intensity are greatly reduced.
Optionally, the elastic strip body is a W-shaped elastic strip and comprises a nose portion and outer limbs connected to two sides of the nose portion, the constraint piece is in a strip shape and transversely inserted between the lower sides of the two outer limbs of the elastic strip body and the upper surface of the nose portion of the elastic strip, the middle of the constraint piece is pressed on the upper side of the nose portion of the elastic strip, and two ends of the constraint piece penetrate through the lower sides of the two outer limbs and are pressed on the lower sides of the two outer limbs.
Optionally, the upper surface of the nose portion is provided with an installation portion for abutting against a flat washer or a spike disk portion or a nut during installation, and a contact position of the restraint piece and the nose portion avoids the installation portion.
Optionally, the nose portion is U-shaped, and includes a middle bending portion and side arms connected to two ends of the bending portion, the side arms of the outer limb and the nose portion are connected through a tail bending section of the elastic strip, the end of the outer limb is connected to a toe end of the elastic strip, the outer limb has an upper arch, two ends of the restraint member abut against the lower side of the upper arch, and the middle of the restraint member presses on two side arms of the nose portion.
Optionally, the contact position of the restraint piece and the two side arms of the nose part is close to the bent part of the nose part.
Optionally, the restraint is rounded or flattened, with the middle of the restraint being upwardly arched relative to the ends.
Optionally, the bullet strip body is e type bullet strip, including well limb, heel tip and toe tip, well limb is connected through first bending section with following between the tip, with being connected through second bending section between tip and the toe tip, the restraint piece is rigid restraint band, the first end of restraint band is detained on the toe tip, and the middle part is walked around the heel tip outside and is pressed with the tip, and the second end of restraint band is detained on heel end well limb or on the connecting portion of well limb and first bending section.
Optionally, the first end of the restraining strip is passed over the toe end by a back clasp from the inside or outside of the toe end; the second end of the restraint strap passes through a gap between the middle limb part and the heel end part and then is buckled on the middle limb part or the connecting part, or the second end of the restraint strap passes through the lower side of the middle limb part or the lower side of the connecting part and then is buckled on the middle limb part or the connecting part.
Optionally, the restraining band and the buckling part with arc shape at two ends, and at least a part of the buckling part at the first end of the restraining band is buckled on the lower surface of the toe end part.
Optionally, the elastic strip body is wrapped with a heat shrinkable sleeve made of a heat shrinkable material.
The utility model discloses still provide a track fastener, include the prestressing force bullet strip with restraint structure of claim.
As mentioned above, the utility model has the advantages that: the utility model discloses, through the bullet strip carry out the restrictive pre-compaction to the specified withholding pressure value before dispatching from the factory, make every bullet strip have equal and satisfy the design requirement withholding pressure before dispatching from the factory, avoided the inequality phenomenon that leads to because of manufacturing, installation factor when being in service; during construction and installation, the elastic strip is installed at a specified position only in a placing mode, and the installation or the adjustment of the compression degree of the elastic strip on the steel rail or the gauge block through a special machine or a tool is not needed on site; after the fine adjustment of the line is finished, the constraint piece on the elastic strip is removed, so that the elastic strip recovers the rebound force to ensure that the elastic strip applies a specified pressing force to the steel rail or the gauge block, the one-time installation is in place, the consistency of the buckling force of the elastic strip at each node is improved, and the installation technical requirement and the labor intensity are greatly reduced.
Drawings
FIG. 1 is a schematic structural view of a W-shaped elastic strip;
fig. 2 is a schematic view (W-shaped) of an embodiment of the prestressed elastic strip with a constraint structure according to the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic structural diagram of an e-shaped elastic strip;
fig. 5 is a left side view (e-shape) of an embodiment of the prestressed elastic strip with restraining structure according to the present invention;
fig. 6 is a top view of an embodiment of the prestressed elastic strip with restraining structure according to the present invention;
fig. 7 is a left side view (e-shape) of another embodiment of the prestressed elastic strip with restraining structure according to the present invention;
fig. 8 is a top view of another embodiment of the prestressed elastic strip with restraining structure according to the present invention;
fig. 9 is a simplified schematic diagram (e type) of 4 restraint modes of the prestressed elastic strip with a restraint structure according to the present invention;
FIG. 10 is a schematic half-sectional view of a W-shaped spring bar mounted on a rail clip;
FIG. 11 is a schematic top view of a W-shaped spring bar mounted on a rail clip;
FIG. 12 is a schematic half-sectional view of an e-shaped spring bar mounted on a rail clip;
fig. 13 is a top view of an e-shaped spring strip mounted on a rail clip.
Part number description:
1-W type elastic strip; 11-nose portion; 11 a-a bend; 11 b-side wall; 12-bending section of tail of elastic strip; 13-outer limb; 14-spring strip toe end; 2-a strip restraint; 3-e type elastic strip; 31-middle limb; 32-a first bend section; 33-heel end; 34-a second curved section; 35-toe end; 4-a restraining band; 41-a first end; 42-a second end; 5-sleeper; 6-steel rail; 71-gauge blocks; 72-helical spikes; 73-rail lower backing plate; 74-iron seat; 75-gauge blocks; 76-spring washers; 77-heightening the backing plate.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Example 1
The embodiment provides a prestressed elastic strip with a constraint structure, which comprises an elastic strip body and a constraint piece, wherein the elastic strip body is pre-compressed and deformed and has prestress, the constraint piece is pressed on at least three parts of the elastic strip body with counter-compression resistance, and the constraint piece exerts constraint force on the elastic strip body to prevent the elastic strip body from rebounding after being compressed, namely prevent the elastic strip body from returning to the original shape. The elastic strip body can be recovered after the constraint of the constraint piece is released.
The elastic strips are subjected to constraint prepressing to a specified buckling pressure value before leaving the factory, and are constrained by the constraint piece, so that each elastic strip has the same buckling pressure which meets the design requirement before leaving the factory, and the phenomenon of inequality caused by manufacturing and installation factors during service is avoided; during construction and installation, the elastic strip is installed at a specified position only in a placing mode, and the installation or the adjustment of the compression degree of the elastic strip on the steel rail or the gauge block through a special machine or a tool is not needed on site; after the fine adjustment of the line is finished, the constraint piece on the elastic strip is removed, so that the elastic strip recovers the rebound force to ensure that the elastic strip applies a specified pressing force to the steel rail or the gauge block, the one-time installation is in place, the consistency of the buckling force of the elastic strip at each node is improved, and the installation technical requirement and the labor intensity are greatly reduced.
There are many types of spring strips, and typical W-shaped spring strips and e-shaped spring strips are illustrated in this example.
As shown in fig. 1, the elastic strip body is a W-shaped elastic strip and has a symmetrical structure; in FIG. 1, (a) is a front view, (b) is a plan view, and (c) is a right side view; the W-shaped elastic strip comprises a nose part 11 and outer limbs 13 connected to two sides of the nose part 11, wherein the nose part 11 is U-shaped and comprises a middle bent part 11a and side arms 11b connected to two ends of the bent part 11a, the outer limbs 13 and the side arms 11b of the nose part 11 are connected through an elastic strip tail bent section 12, the tail ends of the outer limbs 13 are connected with elastic strip toe ends 14, and the outer limbs 13 have an upper arch part.
As shown in fig. 2 and 3, the restraining element is a strip restraining element 2, the strip restraining element 2 is transversely inserted between the lower sides of the two outer limbs 13 of the elastic strip body and the upper surface of the nose part 11 of the elastic strip, the middle part of the restraining element is pressed on the upper side of the nose part 11 of the elastic strip, and the two ends of the restraining element penetrate through the lower parts of the two outer limbs 13 and are pressed against the lower sides of the two outer limbs 13. Specifically, the two ends of the restraint abut against the lower side (i.e., lower surface) of the upper arch, and the middle of the restraint presses against the two side arms 11b of the nose 11.
Wherein, the upper surface of the nose part 11 is provided with a mounting part for pressing during mounting, when the elastic strip is mounted on a rail, the fastening piece presses on the two side arms 11b, so that the contact position of the restraining piece and the nose part 11 avoids the mounting part.
Specifically, the contact position of the restraint with the two side arms 11b of the nose 11 is close to the curved portion 11a of the nose 11, and similarly, the contact position of the bar-shaped restraint 2 with the lower side of the outer limb 13 is also close to the spring strip toe end 14.
The cross section of the strip-shaped restraint part 2 is circular or flat, and the middle part of the restraint part is bent relative to the two ends and arched upwards so as to be pressed on the nose part 11. The action points of the constraint piece and the elastic strip are two side arms 11b and two outer limbs 13, and the two sides are symmetrical, so that the constraint piece has a good constraint effect.
In one embodiment, the elastic strip body is wrapped with a heat-shrinkable sleeve, so that the elastic strip body has a good anti-corrosion protection effect, and the restraint piece is pressed outside the heat-shrinkable sleeve.
The mounting mode of the W-shaped elastic strip 1 on the steel rail 6 as a rail fastener is shown in fig. 10 and 11, a gauge block 71 is mounted on a rail bearing groove or a rail bearing surface of a sleeper 5, the W-shaped elastic strip 1 is pressed on the gauge block 71 and the steel rail 6, a nose portion 11 and an elastic strip toe end 14 are pressed on the steel rail 6, two elastic strip tail bending sections 12 are pressed on the gauge block 71, a spiral spike 72 penetrates through a gap between two side arms 11b of the nose portion 11 and then extends into the steel rail 5 to be directly connected with an embedded sleeve of the steel rail 5 or the embedded sleeve of the steel rail 5, the spiral spike 72 is pressed on the two side arms 11b through flat washers to press the W-shaped elastic strip 1, and the W-shaped elastic strip 1 has a restrained rebound force, so that the spiral spike 72 is basically abutted to the steel rail or to a specified degree, after the mounting is completed, the strip restraint member 2 is sawed off to release the restraint, and the elastic strip presses the steel rail 6. The consistency of the rebounding force of the elastic strip is high, so that the consistency of the buckling pressure of the steel rail 6 can be improved.
The manufacturing method of the elastic strip can adopt the following method: the nose part 11 of the elastic strip is pressed by a press head of the press to move downwards, the displacement is the elastic stroke value of the elastic strip, at the moment, a strip-shaped or sheet-shaped steel restraint piece is inserted from the lower part of the outer side of the arch front section of any outer limb 13 of the elastic strip and surrounds the upper parts of the two side arms 11b of the nose part 11 of the elastic strip, and then the insertion end of the steel restraint piece penetrates through the lower part of the inner side of the arch front section of the other outer limb 13 of the elastic strip. Thus, 4 points on the surface of the steel restraint part respectively contact 2 points below the inner side of the arch front section of 2 outer limbs 13 of the elastic strip and 2 points above two side arms 11b of the nose part 11 of the elastic strip, when the pressure head leaves the front section of the middle part of the elastic strip, the steel restraint part prevents the nose part 11 of the elastic strip from returning to the state before compression through the 4 points, and the restrained state of the elastic strip is formed.
When the fastener is installed, the heightening base plate, the under-rail base plate 73 and the gauge block 71 are sequentially placed in a rail bearing groove of the sleeper 5, then the steel rail 6 is placed on the under-rail base plate 73, the bent section 12 of the tail part of the elastic strip 1 which is restrained in advance is placed in a groove channel of the gauge block 71, two toe ends 14 are placed on the upper surface of the rail bottom of the steel rail 6, after the rail is placed in place, the spiral spike 72 with a disc shape penetrates through a neutral stop formed by the bent part 11a and the side wall 11b of the nose part 11 of the elastic strip and is screwed into a sleeve pre-embedded in the sleeper 5, the disc-shaped bottom part of the spiral spike 72 with a disc shape is made to contact with the elastic strip 1, and after the fine adjustment of the rail is completed, the strip-shaped restraining part 2 on the elastic strip 1 is cut by a tool to release the restraint on the elastic strip 1, so that the. Since the nose 11 of the spring strip is still further limited by the disk-shaped bottom of the screw spike 72, the two outer limbs 13 of the spring strip have a reaction force directed toward the rail bottom of the rail 6, i.e., a buckling force on the rail 6.
Example 2
In this example, the elastic strip body is an e-shaped elastic strip 3, which comprises a middle limb 31, a heel end 33 and a toe end 35, the middle limb 31 and the heel end 33 are connected by a first bending section 32, and the heel end 33 and the toe end 35 are connected by a second bending section 32, as shown in fig. 4, wherein fig. 4(a) is a front view of the e-shaped elastic strip 3, and fig. 4(b) is a top view; fig. 4(c) is a left side view.
In this example, the restraint member is a rigid restraint strap 4, the first end 41 of the restraint strap 4 is fastened to the toe end 35, the middle part passes around the outside of the heel end 33 and presses against the outer surface of the heel end 33, the second end 42 of the restraint strap 4 is fastened to the heel end mid-limb 31 or the connection part of the mid-limb 31 and the first curved section 32, the mid-limb 31 is inserted into the hole of the iron seat 74 on the sleeper 5 during installation, so that the space distance between the restraint strap 4 and the inserted section of the mid-limb 31 is at least larger than the thickness of the hole wall of the iron seat 74, and when the second end 42 of the restraint strap 4 is fastened to the mid-limb 31, the contact position is at the end of the mid-limb 31 close to the first curved section 32.
There are several ways to restrain the two ends of the restraining strip 4 and the e-shaped elastic strip 3, and as shown in fig. 9, the restraining strip 4 and the e-shaped elastic strip 3 form 3 contact positions, that is, the first end 41 of the restraining strip 4 and the outer wall of the toe end portion 35, the restraining strip 4 and the outer wall of the heel end portion 33, and the second end 42 of the restraining strip 4 and the outer wall of the middle limb portion 31 (or the connection between the middle limb portion 31 and the first bending portion 32). The first end 41 of the restraining strip 4 has two types of crimping with the toe end 35 and the second end 42 of the restraining strip 4 has two types of crimping with the mid-limb 31 (or joint).
Specifically, referring to fig. 9(a), the first end 41 of the restraining band 4 passes around the outside of the toe end 35 and is buckled to the toe end 35 from the outside of the toe end 35, and for a better restraining effect, the first end 41 is partially pressed against the lower surface of the toe end 35; the second end 42 of the restraining strip 4 is passed around the outside of the mid-limb 31 (i.e. passing under the mid-limb 31) and then fastened to said mid-limb 31, or the second end 42 of the restraining strip 4 is passed around the outside of the attachment portion (i.e. passing under the attachment portion) and then fastened to the attachment portion.
The structure of this constraint is shown in fig. 5 and 6.
Wherein, for the convenience of pressing, the two ends of the restraint strap 4 are provided with arc-shaped buckling parts, wherein, at least a part of the buckling part at the first end 41 of the restraint strap 4 is buckled on the lower surface of the toe end part 35.
Referring to fig. 9(b), first end 41 of restraining strip 4 is looped around the outside of toe end 35 and is attached to toe end 35 from the outside of toe end 35, and second end 42 of restraining strip 4 is attached to either mid-limb 31 or the attachment portion through the gap between mid-limb 31 and heel end 33, i.e., second end 42 of restraining strip 4 extends inside mid-limb 31. The structure of this constraint is shown in fig. 7 and 8.
Referring to fig. 9(c), first end 41 of restraining strip 4 extends from inside of toe end 35, and is attached to toe end 35 from inside of toe end 35, and second end 42 of restraining strip 4 is attached to either mid-limb 31 or the attachment portion through the gap between mid-limb 31 and heel end 33, i.e., second end 42 of restraining strip 4 extends from inside of mid-limb 31.
Referring to fig. 9(d), first end 41 of restraint band 4 extends from the inside of toe end 35 and is clasped on toe end 35 from the inside of toe end 35, second end 42 of restraint band 4 is clasped on mid-limb 31 around the outside of mid-limb 31 (i.e. passing under mid-limb 31), or second end 42 of restraint band 4 is clasped on the joint around the outside of the joint (i.e. passing under the joint).
In one embodiment, the elastic strip body is wrapped with a heat-shrinkable sleeve made of a heat-shrinkable material (such as polyethylene, polyvinyl chloride and the like), so that the elastic strip body has a good anti-corrosion protection effect.
The e-shaped elastic strip 3 is used as a rail fastener and is mounted on a steel rail 6 as shown in fig. 12 and 13, an iron seat 74 is mounted on a sleeper 5 through a track screw 72 and a spring washer 76, a mounting hole for inserting the middle limb part 31 is formed in the iron seat 74 along the length direction of the steel rail 6, the steel rail 6 is mounted on the iron seat 74 through a rail lower backing plate 73, a gauge block 75 is mounted above the bottom of the steel rail 6, the toe end part 35 of the e-shaped elastic strip 3 is pressed on the gauge block 75, the heel end part 33 is pressed on the iron seat 74, and the middle limb part 31 penetrates through the mounting hole; an heightening base plate 77 and the like can be arranged between the iron seat 74 and the steel rail 5, wherein the lower rail base plate 73 and the heightening base plate 77 are rubber plates; after the e-shaped elastic strip 3 is installed, the constraint of the constraint belt 4 is released, the e-shaped elastic strip 3 recovers elasticity, and the steel rail 6 is tightly pressed. Wherein the restraining strip 4 can be released by sawing. The e-shaped prestressed spring band 3 is produced in a manner similar to that of example 1.
The elastic strips are subjected to constraint prepressing to a specified buckling pressure value before leaving the factory, so that each elastic strip has equal buckling pressure meeting design requirements before leaving the factory, and the buckling pressure formed by prepressing the elastic strips is ensured to have the characteristics of consistency or customization; after the prestressed elastic strip is installed, the restraining piece can be removed by using a simple tool and a simple method, so that the elastic strip has the capability of restoring elasticity. The phenomenon of inequality caused by manufacturing and installation factors in service is avoided; during construction and installation, the elastic strip is only required to be placed to a specified position, and then the nut or the spiral spike with the disc shape is manually screwed in to enable the disc-shaped bottom of the flat washer or the spiral spike to contact the elastic strip, so that a special machine or tool is not required; after the fine adjustment of the line is finished, removing the constraint piece on the elastic strip to restore the rebound force of the elastic strip, so as to achieve the level of one-time installation in place; the elastic strip is of a standard component structure, so that friction power consumption between the elastic strip and a flat washer in the process of installation and in the process of elastic strip compression in the prior art is avoided, consistency or customization of elastic strip buckling pressure of each line node is realized, and line construction precision is improved; the labor intensity of constructors is obviously reduced, the construction equipment cost is greatly reduced, the installation work efficiency is obviously improved, and the line construction cost is greatly saved.
Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (11)
1. The utility model provides a prestressing force bullet strip with restraint structure which characterized in that: the elastic strip comprises an elastic strip body which is pre-compressed and deformed and has prestress and a constraint piece which is connected with the elastic strip body and exerts constraint force on the elastic strip body, wherein the constraint piece is pressed on at least three parts of the elastic strip body with counter-compression resistance to prevent the elastic strip body from rebounding after being compressed.
2. The prestressed elastic band with restraining structure according to claim 1, wherein: the bullet strip body is W type bullet strip, including nasal part and the outer limb of connection in the nasal part both sides, it is the strip to restrict the piece, and this restriction piece violently inserts between two outer limb downside of bullet strip body and bullet strip nasal part upper surface, it presses at bullet strip nasal part upside to restrict the piece middle part, and restriction piece both ends pass the below of two outer limbs and press the downside at two outer limbs.
3. The prestressed elastic band with restraining structure according to claim 2, wherein: the installation portion that supports and presses plain washer, spike disk portion or nut when the nasal part upper surface is provided with and is used for the installation, the contact position of restraint piece and nasal part avoids the installation portion.
4. The prestressed elastic band with restraining structure according to claim 2, wherein: the nasal part is the U type, including middle flexion and the side arm of being connected with flexion both ends, the outer limb passes through the curved section of bullet strip afterbody with the side arm of nasal part and is connected, the terminal bullet strip toe end of connecting of outer limb, the outer limb has last hunch portion, about the piece both ends support at last hunch portion downside, about the piece middle part pressure is on two side arms of nasal part.
5. The prestressed elastic band with restraining structure of claim 4, wherein: the contact positions of the restraint piece and the two side arms of the nose part are close to the bent part of the nose part.
6. The prestressed elastic band with restraining structure according to claim 2, wherein: the restraint piece is round or flat, and the middle part of the restraint piece is arched upwards relative to the two ends.
7. The prestressed elastic band with restraining structure according to claim 1, wherein: the bullet strip body is e type bullet strip, including well limb portion, with tip and toe tip, well limb portion is connected through first bending section with following between the tip, be connected through second bending section between tip and the toe tip, about-band is rigid about band, about band first end is detained on the toe tip, and the middle part is walked around with the tip outside and is pressed with the tip, and about band's second end is detained on the limb portion or on the connecting portion of well limb portion and first bending section in the end.
8. The prestressed elastic band with restraining structure of claim 7, wherein: the first end of the restraint strap is buckled on the toe end part from the inner side or the outer side of the toe end part through the back; the second end of the restraint strap passes through a gap between the middle limb part and the heel end part and then is buckled on the middle limb part or the connecting part, or the second end of the restraint strap passes through the lower side of the middle limb part or the lower side of the connecting part and then is buckled on the middle limb part or the connecting part.
9. The prestressed elastic band with restraining structure of claim 7, wherein: the restraint strap and the buckling parts with the two ends provided with arcs, and at least one part of the buckling part at the first end of the restraint strap is buckled on the lower surface of the toe end part.
10. The prestressed elastic band with a constraint structure according to any one of claims 1 to 9, wherein: the elastic strip body is wrapped with a heat-shrinkable sleeve made of a heat-shrinkable material.
11. A rail clip, characterized in that: comprising a prestressed elastic strip with a constraint structure according to any one of claims 1 to 10.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920179678 | 2019-01-31 | ||
| CN2019201796789 | 2019-01-31 |
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| CN210715522U true CN210715522U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921690649.5U Active CN210715521U (en) | 2019-01-31 | 2019-10-10 | Prestress elastic support piece, anti-loosening connecting structure, damping supporting structure and track fastener |
| CN201910959413.5A Pending CN110700019A (en) | 2019-01-31 | 2019-10-10 | Railway fastener system with transverse prestressed elastic support and installation method |
| CN201921690693.6U Active CN210715522U (en) | 2019-01-31 | 2019-10-10 | Prestressed elastic strip with constraint structure and rail fastener |
| CN201921690672.4U Active CN210799678U (en) | 2019-01-31 | 2019-10-10 | Floating rail fastener system |
| CN201921690483.7U Active CN210946309U (en) | 2019-01-31 | 2019-10-10 | Railway fastener system with transverse prestressed elastic support |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921690649.5U Active CN210715521U (en) | 2019-01-31 | 2019-10-10 | Prestress elastic support piece, anti-loosening connecting structure, damping supporting structure and track fastener |
| CN201910959413.5A Pending CN110700019A (en) | 2019-01-31 | 2019-10-10 | Railway fastener system with transverse prestressed elastic support and installation method |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921690672.4U Active CN210799678U (en) | 2019-01-31 | 2019-10-10 | Floating rail fastener system |
| CN201921690483.7U Active CN210946309U (en) | 2019-01-31 | 2019-10-10 | Railway fastener system with transverse prestressed elastic support |
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| CN210715521U (en) * | 2019-01-31 | 2020-06-09 | 何萍 | Prestress elastic support piece, anti-loosening connecting structure, damping supporting structure and track fastener |
| CN114893534B (en) * | 2022-04-14 | 2023-10-20 | 泰安市港鑫毛纺织有限公司 | Textile equipment with damping function and textile damping method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2493886B1 (en) * | 1980-11-13 | 1986-05-09 | Schwihag Gmbh | DEVICE FOR FIXING RAILS, PARTICULARLY ON CROSSERS, INCLUDING A SEAT PLATE |
| CN103088722B (en) * | 2011-10-29 | 2015-12-16 | 青岛科而泰环境控制技术有限公司 | Transverse stiffness-reinforcedrail rail fastener |
| CN204753269U (en) * | 2015-06-12 | 2015-11-11 | 费弘博 | Anti rail of railway tumble gauge apron and bullet strip fastener |
| CN106930160B (en) * | 2017-02-16 | 2019-02-19 | 京投科技（北京）有限公司 | A kind of steel rail vibration reduction fastener for railcar phase library interior lines |
| CN109235163A (en) * | 2018-11-06 | 2019-01-18 | 安徽神剑科技股份有限公司 | A kind of non-model control type bilayer nonlinear vibration reduction fastener |
| CN210715521U (en) * | 2019-01-31 | 2020-06-09 | 何萍 | Prestress elastic support piece, anti-loosening connecting structure, damping supporting structure and track fastener |
-
2019
- 2019-10-10 CN CN201921690649.5U patent/CN210715521U/en active Active
- 2019-10-10 CN CN201910959413.5A patent/CN110700019A/en active Pending
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| CN210715521U (en) | 2020-06-09 |
| CN210946309U (en) | 2020-07-07 |
| CN210799678U (en) | 2020-06-19 |
| CN110700019A (en) | 2020-01-17 |
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