CN106087601A - A kind of arch deformation stopping means allowing track plates longitudinal extension for maintenance - Google Patents

Abstract

The present invention is an upper arch deformation limiting device that allows longitudinal expansion and contraction of track slabs for maintenance, and is mainly used in the maintenance and repair process of CRTS II slab ballastless track to limit the arch deformation of track slabs. It includes crimping plate, power transmission pillow seat, crimping parts, crimping spring, crimping nut and pull rod. The crimping plate is crimped on the track plate. The bottom end of the pull rod is fixedly connected with the base plate through the oval bolt hole. The upper part of the pull rod passes through crimping in turn. Plate, force transmission pillow seat, buckle and buckle spring, the upper part of the pull rod is provided with threads, and the buckle nut is screwed on the upper end of the buckle spring through the thread. The device is equipped with elliptical bolt holes that allow the longitudinal expansion and contraction of the track slab, which is conducive to the release of the longitudinal stress inside the track slab, which can not only make maintenance and repair more efficient, flexible and maneuverable, but also ensure the high ride comfort of the high-speed railway and the transverse direction of the line. stability. The invention has the advantages of simple structure, definite stress, firmness, reliability, flexibility, low manufacturing cost and long service life.

Description

An upper arch deformation limiting device that allows longitudinal expansion and contraction of track slabs for maintenance

technical field

The invention relates to the technical field of ballastless track seamless lines, in particular to an upper arch deformation limiting device for maintenance that allows track slabs to expand and contract longitudinally.

Background technique

By the end of 2015, my country's high-speed railway mileage had reached 19,000 kilometers, accounting for more than 60% of the world's total mileage of high-speed railways. The track structure of my country's high-speed railways mainly adopts ballastless track seamless lines. Among them, CRTSⅡ type slab ballastless track is a structural type mainly used in my country, and it is also a unique type. Its track structure adopts a fully continuous type, which can be The laying of cross-beam joints and structural expansion joints has been laid and applied on many lines such as the Beijing-Tianjin Intercity Railway, the Beijing-Shanghai High-speed Railway, the Beijing-Guangzhou High-speed Railway, and the Jin-Qin High-speed Railway.

On-site research shows that under the repeated action of train load and temperature load, the force deformation and state parameters of CRTS II slab ballastless track seamless line have changed from the beginning of design, and the frequency and types of diseases are increasing, especially It is at the wide and narrow seams. During the seasonal change period, the temperature difference between day and night increases, and the temperature stress in the track slab changes suddenly, resulting in extremely uneven stress in the track slab, which causes the concrete at the joint between the slabs to be damaged due to repeated tension and compression, and the track slab to arch. In addition, when the quality of the joints between the slabs is not up to standard or the installation of the joint tension locks is not standard, it will also aggravate the phenomenon of arching and crushing of the track slab. Once the above-mentioned diseases occur, it is difficult to guarantee the stability and smoothness of the track structure, ranging from train speed limit to severe accidents.

At present, for the arch deformation disease on the track slab caused by the damage of wide and narrow joints, the existing treatment measures process is drilling→planting reinforcement and anchoring→unlocking the track slab→gluing the slab seam and repairing the track slab→adjacent track at the wide joint Rebar planting and glue injection at the bottom of the slab, where the position and quantity of the rebar planting should be calculated according to the timing of the disease on site. However, the above-mentioned method of drilling and planting bars is not adjustable for the maintenance of the track structure. At the same time, because the arched gaps on the track slab occur in the high temperature season in summer, the above-mentioned method of planting bars is likely to cause the track slab to be damaged by strain at low temperature.

Therefore, it is necessary to provide an upper arch deformation limiting device for maintenance that allows the longitudinal expansion and contraction of the track slab. The anchoring and limiting function of the upper arch disease can also allow the longitudinal expansion and contraction of the track slab to prevent the occurrence of secondary diseases. At the same time, the buckle pressure of the device can be adjusted at any time according to the line conditions and operating conditions in the later stage to better improve the smoothness of the line.

Contents of the invention

The technical problem to be solved by the present invention is to provide an upper arch deformation limiting device for maintenance that allows the longitudinal expansion and contraction of the track slab, which is used in the maintenance and repair process of the ballastless track, has the function of adjustable buckle pressure, and can allow the track The longitudinal expansion and contraction of the plate solves the problem of secondary diseases that may occur in the traditional anchoring method of planting bars. The device can effectively buckle and limit the arch defect on the track slab without affecting the operation safety of the train.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

An upper arch deformation limiting device for maintenance that allows the longitudinal expansion and contraction of the track plate, including a buckle plate, a force transmission pillow seat, a buckle piece, a buckle spring, a buckle nut and a pull rod, and the buckle plate is buckled on an oval bolt hole On the track plate, the bottom end of the pull rod passes through the oval bolt hole and is fixedly connected with the base plate, and the upper part of the pull rod passes through the buckle plate, the force transmission pillow seat, the buckle and the buckle spring in sequence, and the upper part of the pull rod is provided with There are threads, and the buckle nut is screwed to the upper end of the buckle spring through threads. The elliptical bolt hole can allow the track plate to expand and contract longitudinally, which is beneficial to the release of the longitudinal stress inside the track plate.

Preferably, the left and right sides of the crimping plate are fixedly provided with support pieces, the height of the support piece decreases gradually from the connection with the crimping plate to the other end, and the support piece is provided with structural holes. This structural design of the support block can ensure uniform force transmission. The advantage of the structural hole is that the limiting device is easy to carry.

Preferably, the front and rear sides of the crimping plate are provided with gentle slope structures. The structure principle of the gentle slope structure and the retainer is the same, both of which are to ensure a more uniform force transmission of the crimping plate.

Preferably, shoulders are provided on the left and right sides of the force-transmitting pillow, the buckling part is an upper arched structure, and the legs on both sides of the buckling part are clamped inside the shoulders of the force-transmitting pillow.

Preferably, the bottom surfaces of the legs on both sides of the fastening member are provided with chamfers. The chamfer can disperse the stress and prevent the problem of stress concentration.

Preferably, both ends of the buckle spring are provided with buckle washers. The function of the buckle gasket is to reduce friction, prevent loosening and distribute pressure.

Preferably, a rubber pad is provided between the track plate and the crimping plate. The rubber backing plate can increase the friction between the track plate and the buckle plate.

Preferably, the bottom end of the pull rod is glued and anchored to the base plate. The bottom end of the tie rod and the base plate are glued and anchored to ensure the correct positional relationship between the track plate and the base plate, and the elliptical bolt holes that allow the track plate to expand and contract longitudinally are conducive to the release of the internal longitudinal stress of the track plate.

Preferably, a sealing and waterproof device is provided between the elliptical bolt hole on the upper surface of the track plate and the pull rod.

Preferably, the sealing waterproof device is waterproof glue with a depth of 50mm. Waterproof treatment is carried out at the elliptical bolt hole of the track plate. Since there is no glue injection and anchorage at the overlapping position of the tie rod and the track plate, but there is a space to allow the track plate to expand and contract longitudinally, so it is necessary to drill holes for the buckled device and the track plate The mouth is sealed and waterproofed. The waterproof material is waterproof glue with high flexibility, high waterproof and moisture barrier performance, and high adhesion. The depth of the waterproof glue injection port is 50mm.

The beneficial effects of the present invention are as follows:

An upper arch deformation limiting device for maintenance that allows the longitudinal expansion and contraction of the track slab according to the present invention adopts the above technical scheme, which does not affect the rectification effect of the arch deformation on the track slab, and the force and force transmission are relatively clear. It is convenient for the installation, inspection and replacement of various components. It can not only make the maintenance and repair efficient, flexible and maneuverable, but also ensure the high ride comfort of the high-speed railway and the lateral stability of the line, and ensure the safety of driving. The crimping and limiting device of the present invention has the advantages of simple structure, clear force, firmness, reliability, flexibility, low manufacturing cost and long service life.

Description of drawings

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 shows a schematic structural view of an upper arch deformation limiting device for maintenance that allows longitudinal expansion and contraction of track slabs according to the present invention.

Fig. 2 shows a cross-sectional view of an upper arch deformation limiting device for maintenance that allows track slabs to expand and contract longitudinally according to the present invention.

Fig. 3 shows an enlarged view of part A in Fig. 2 of the present invention.

Fig. 4 shows a schematic diagram of the mechanism of the sealing and waterproofing device for the track plate of the upward arch deformation limiting device that allows the track plate to expand and contract longitudinally according to the present invention.

Fig. 5 shows an enlarged top view of part B in Fig. 4 of the present invention.

detailed description

In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

As shown in Figures 1 to 5, an upper arch deformation limiting device for maintenance that allows the longitudinal expansion and contraction of the track plate, including a buckle plate 603, a force transmission pillow 601, a buckle 4, a buckle spring 3, and a buckle nut 2 and the pull rod 1, the crimping plate 603 is crimped on the track plate 8 with the elliptical bolt hole 10, the bottom end of the pull rod 1 is fixedly connected with the base plate 9 through the elliptical bolt hole 10, the bottom end of the pull rod 1 Inject glue with the base plate 9 to anchor. The upper part of the pull rod 1 passes through the crimping plate 603 , the force transmission pillow 601 , the crimping member 4 and the crimping spring 3 sequentially, and a rubber backing plate 5 is arranged between the track plate 8 and the crimping plate 603 . Both ends of the buckle spring 3 are provided with buckle washers 7 . The upper part of the pull rod 1 is provided with threads, and the buckle nut 2 is screwed to the upper end of the buckle spring 3 through threads. A sealing and waterproof device is provided between the oval bolt hole 10 on the upper surface of the track plate 8 and the pull rod 1 . The sealing waterproof device is waterproof glue with a depth of 50mm.

The left and right sides of the crimping plate 603 are fixedly provided with retaining pieces 602 , the height of the retaining plate 602 decreases slowly from the connection with the crimping plate 603 to the other end, and the supporting retaining pieces 602 are provided with structural holes. The front and rear sides of the crimping plate 603 are provided with gentle slope structures. The left and right sides of the force transmission pillow 601 are provided with shoulders, the buckle 4 is an upper arched structure, and the legs on both sides of the buckle 4 are clamped inside the shoulders of the force transmission pillow 601 . The bottom surfaces of the legs on both sides of the crimping member 4 are provided with chamfers.

The specific dimensions of each component are as follows: the buckle plate 603 is 400mm long, 200mm wide, and 20mm thick; the power transmission pillow seat 601 is 200mm long, 100mm wide, and the total height is 40mm; the shoulders on both sides are triangular prisms; The triangle bottom×height is 20mm×20mm, and the crimping plate 603 and the force transmission pillow 601 are connected into one body by welding. The crimping spring 3 has a stiffness of 250N/mm, a force adjustment range of 0-10000N, and a stretching distance of 0-40mm. The crimping backing plate 7 is arranged on the upper and lower ends of the crimping spring 3, and the size is 60mm long, 40mm wide, and 10mm thick. The size of the track plate 8 is 6450mm long, 2550mm wide and 200mm thick. The base plate 9 is 6450mm long, 2950mm wide and 300mm thick. The tie rod 1 is made of HRB500 steel bar Φ28, and the length of the steel bar is L=380mm. of thread. Rubber backing plate 5 is long 400mm, wide 200mm, thick 10mm. The elliptical bolt hole is set at the center of each component, the long axis of the elliptical bolt hole is 50mm long, and the short axis is 35mm long.

The installation process of an upper arch deformation limiting device that allows longitudinal expansion and contraction of the track slab for maintenance of the present invention is as follows:

(1) Carry out drilling rig drilling on the track plate 8 at the upper arch. The shape of the drilling hole is an elliptical bolt hole, the size is 50mm long axis, 35mm long axis, and 430mm drilling depth. The number of drilled holes is for reference The traditional anchoring method is carried out.

(2) Put the tie rod 1 vertically into the oval bolt hole, the upper end of the tie rod 1 is provided with threads, and the tie rod 1 and the base plate 9 coincide with each other, and the traditional anchoring method of planting bars is used for anchoring with glue injection.

(3) Pass the rubber backing plate 5 and the crimping plate 603 through the pull rod 1 through the oval bolt hole, place the upper surface of the track plate 8, clean the upper surface of the track plate 8 in advance, calibrate the position of the rubber backing plate 5 and the crimping plate 603 and fixed.

(4) As shown in Figure 1, install, check, position, and fix the crimping backing plate 7 and crimping spring 3, and apply torque to the crimping nut 2 to crimp the crimping device on the upper surface of the track plate to limit the position effect.

(5) Waterproof treatment is carried out as shown in Figure 4-Figure 5. Since there is no glue injection and anchorage at the overlapping position of the tie rod 1 and the track plate 8, but there is a space that allows the track plate 8 to expand and contract longitudinally, so it is necessary to carry out the crimping. The device and the track plate 8 are put into the oval bolt holes for sealing and waterproofing. The waterproof material is waterproof glue with high flexibility, high waterproof and moisture barrier performance, and high adhesion. The depth of the waterproof glue injection port is 50mm.

(6) Debug the fully installed and fixed device. Since the degree of arching on the upper surface of the track plate 8 is different, it is necessary to uniformly install and debug the device. limit.

Due to changes in the external environment in the later stage, the track plate 8 may undergo corresponding force deformation under operating conditions, which will cause changes in the working state of the limit device. Therefore, it is necessary to increase or decrease the buckle pressure of the limit device to improve coordination. Post-maintenance in the form of effects and other forms.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those of ordinary skill in the art can also make It is not possible to exhaustively list all the embodiments here, and any obvious changes or changes derived from the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims (10)

1. An upper arch deformation limiting device that allows longitudinal expansion and contraction of the track plate for maintenance, characterized in that it includes a buckle plate (603), a force transmission pillow (601), a buckle (4), a buckle spring (3 ), buckle nut (2) and pull rod (1), the buckle plate (603) is buckled on the track plate (8) with ellipse bolt hole (10), and the bottom end of the pull rod (1) passes through the ellipse The bolt hole (10) is fixedly connected with the base plate (9), and the upper part of the pull rod (1) passes through the crimping plate (603), force transmission pillow (601), crimping piece (4) and crimping spring (3) in sequence , the upper part of the pull rod (1) is provided with threads, and the buckle nut (2) is screwed to the upper end of the buckle spring (3) through threads. 2. The upper arch deformation limiting device for maintenance according to claim 1, which allows longitudinal expansion and contraction of the track plate, characterized in that: the left and right sides of the buckle plate (603) are fixedly provided with supporting pieces (602 ), the height of the support block (602) drops slowly from the connection with the buckle plate (603) to the other end, and the support block (602) is provided with a structural hole. 3. The upward arch deformation limiting device for maintenance according to claim 2, which allows longitudinal expansion and contraction of the track plate, characterized in that: the front and rear sides of the buckle plate (603) are provided with gentle slope structures. 4. The upper arch deformation limiting device for maintenance according to claim 1, which allows longitudinal expansion and contraction of the track plate, characterized in that shoulders are provided on the left and right sides of the force transmission pillow seat (601), The crimping part (4) has an upper arched structure, and the legs on both sides of the crimping part (4) are clamped on the inner side of the shoulder of the power transmission pillow seat (601). 5. The upward arch deformation limiting device for maintenance according to claim 4, which allows longitudinal expansion and contraction of the track plate, characterized in that: the bottom surfaces of the legs on both sides of the holding part (4) are provided with chamfers. 6. The upward arch deformation limiting device for maintenance according to claim 1, which allows longitudinal expansion and contraction of the track plate, characterized in that: two ends of the buckle spring (3) are provided with buckle gaskets (7) . 7. The upward arch deformation limiting device for maintenance according to claim 1, which allows longitudinal expansion and contraction of the track plate, characterized in that: there is a rubber Backing plate (5). 8. The upper arch deformation limiting device for maintenance that allows longitudinal expansion and contraction of the track plate according to claim 1, characterized in that: the bottom end of the tie rod (1) is glued to the base plate (9) for anchoring . 9. The upward arch deformation limiting device for maintenance that allows longitudinal expansion and contraction of the track plate according to claim 1, characterized in that: the elliptical bolt hole (10) on the upper surface of the track plate (8) and the tie rod (1) A sealing and waterproof device is provided between them. 10. The upward arch deformation limiting device for maintenance according to claim 9, which allows longitudinal expansion and contraction of the track slab, wherein the sealing and waterproof device is waterproof glue with a depth of 50mm.