阅读说明：本技术 一种铁路道岔用整铸滑床板 (Integrally cast slide plate for railway turnout ) 是由 张巧珍 于 2020-08-14 设计创作，主要内容包括：本发明涉及铁路附件技术领域,具体公开了一种铁路道岔用整铸滑床板,包括通过融模铸造形成的垫板、台板和铁座,所述垫板的底面为平面,所述垫板上面纵向方向的两端分别设置有所述台板和所述铁座,所述台板和所述铁座之间形成用于容纳所述铁路道岔基本轨的承轨槽,所述台板的上面为平面,所述台板和所述垫板的之间具备密封空腔,所述空腔位于所述垫板一侧设置有位于所述垫板上的开口,所述开口的面积不小于所述空腔在水平面投影面积的1/3。本发明通过在垫板底部设置开口面积较大的通气口,使得在台板下部形成利于减震和形变的空腔的同时,铸模更容易加工,成型效果好,脱模更加便利,大大提高了滑床板的加工制造效率。(The invention relates to the technical field of railway accessories, and particularly discloses a block casting slide chair for railway turnouts, which comprises a base plate, a bedplate and an iron seat which are formed by casting through a melt mold, wherein the bottom surface of the base plate is a plane, the bedplate and the iron seat are respectively arranged at two ends in the longitudinal direction of the upper surface of the base plate, a rail bearing groove for accommodating a railway turnout stock rail is formed between the bedplate and the iron seat, the upper surface of the bedplate is a plane, a sealed cavity is arranged between the bedplate and the base plate, an opening positioned on the base plate is arranged at one side of the base plate, and the area of the opening is not less than 1/3 of the projection area of the cavity on the horizontal plane. According to the invention, the vent hole with a larger opening area is arranged at the bottom of the base plate, so that the casting mold is easier to process, the forming effect is good, the demolding is more convenient while the cavity which is beneficial to shock absorption and deformation is formed at the lower part of the bedplate, and the processing and manufacturing efficiency of the slide plate is greatly improved.)

1. The utility model provides a railway switch is with sliding plate of monolithic casting, includes backing plate (1), platen (2) and iron stand (7) that form through the casting of melting die, the bottom surface of backing plate (1) is the plane, the both ends of longitudinal direction are provided with respectively above backing plate (1) platen (2) with iron stand (7), platen (2) with form between iron stand (7) and be used for holding rail bearing groove (6) of railway switch stock rail, the higher authority of platen (2) is the plane, its characterized in that: a sealed cavity (3) is arranged between the bedplate (2) and the base plate (1), an opening (5) in the base plate (1) is formed in one side, located on the base plate (1), of the cavity (3), and the area of the opening (5) is not smaller than 1/3 of the projection area of the cavity (3) on the horizontal plane.

2. The integrally cast slide plate for a railway switch according to claim 1, wherein: the opening (5) is rectangular or circular.

3. The integrally cast slide plate for a railway switch according to claim 1, wherein: the cavity (3) is provided with pin holes (4) in the transverse direction of the bedplate (2).

4. The integrally cast slide plate for a railway switch according to claim 1, wherein: bolt holes (8) are respectively arranged at the positions, close to the edges, of the four corners or the longitudinal two side ends of the backing plate (1).

5. The integrally cast slide plate for a railway switch according to claim 4, wherein: the bolt holes (8) are long holes or round holes.

6. The integrally cast slide plate for a railway switch according to claim 4 or 5, wherein: the hole end of the bolt hole (8) is subjected to rounding treatment of R1mm-R5 mm.

7. The integrally cast slide plate for a railway switch according to claim 4 or 5, wherein: and chamfering treatment is carried out on the hole end of the bolt hole (8) by 0.8-1.5 mm.

8. The integrally cast slide plate for a railway switch according to claim 1, wherein: the contact plane of the bedplate (2) and the switch rail comprises a hardening section and a basic section, wherein the hardening section is a region for hardening the surface of the bedplate (2), the hardening section is positioned on one side of the bedplate (2) far away from the iron base (7), and the hardening section comprises a recess lower than the basic section and a hardening layer arranged in the recess.

Technical Field

The invention relates to the technical field of railway accessories, in particular to a block casting slide chair for a railway turnout.

Background

The slide plate is an important part of the turnout for supporting the switch rail and providing a sliding space for the switch rail, and is mainly used for supporting the pressure transmitted by the switch rail and the stock rail and transmitting the pressure to the turnout sleeper. At present, more slide bed plates are adopted for domestic railway turnouts and mainly comprise a common-speed turnout slide bed plate, a speed-increasing turnout slide bed plate and a passenger-dedicated turnout slide bed plate, and the slide bed plate and the passenger-dedicated turnout slide bed plate structurally comprise a slide bed bedplate and a bottom plate which are connected in a welding mode. The requirements of the railway department on the turnout sliding bed platform are as follows: can work reliably and durably under the working conditions of high speed, heavy load, severe abrasion, corrosion and the like. The slide plate is positioned on the turnout sleeper surface in the length range of the whole switch rail, and has higher requirements on the wear resistance and the corrosion resistance of the surface. The welded slide plate generates thermal deformation in the welding process, so that the bottom plate warps, the bedplate of the slide plate cannot be in close contact with the rail bottom of the switch rail, a hanging plate phenomenon is generated, a gap of about 1mm or more is formed between the bedplate of the slide plate and the rail bottom of the switch rail, the rail bottom of the switch rail is suspended, the working condition is severe, and the service life of the switch rail is influenced. And the strong vibration of the train in long-term operation causes fatigue of the welding seam connected between the bedplate and the bottom plate, so that the problems of crack, damage, even falling and the like occur at the welding seam.

A Chinese patent (publication No. CN101704185B discloses a method for manufacturing a monolithic casting slide chair plate for railway turnout, which comprises the following steps of A, casting a bottom plate, an iron seat, a guide iron and a milling bedplate into a whole by adopting a casting process, B, casting two long grooves at corresponding positions right below a limiting boss and a supporting boss in an inner cavity of the bedplate, C, finely machining the limiting boss and the supporting boss by the two long grooves, D, respectively machining a pin hole at two sides of the bottom plate, respectively communicating the pin hole with the two long grooves, and E, milling a working surface of the bedplate.

However, in the casting process, the two long grooves are respectively adopted for air intake and exhaust, so that the casting mold is generally of a split structure, the casting process is complex, the improvement of the one-step casting qualification rate of finished products is not facilitated, and the production efficiency of the slide plate is influenced.

Disclosure of Invention

In view of the above, the present invention aims to provide a block casting slide plate for a railway switch, wherein a vent with a large opening area is arranged at the bottom of a base plate, so that a cavity favorable for shock absorption and deformation is formed at the lower part of a bedplate, and a casting mold is easy to process, has a good forming effect, is convenient to demold, and greatly improves the processing and manufacturing efficiency of the slide plate.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a railway switch is with smooth bed board of block casting, includes backing plate, platen and the iron stand that forms through the casting of melt mould, the bottom surface of backing plate is the plane, the both ends of longitudinal direction are provided with respectively on the backing plate the platen with the iron stand, the platen with form between the iron stand and be used for holding the rail bearing groove of railway switch stock rail, the higher authority of platen is the plane, the platen with possess sealed cavity between the backing plate, the cavity is located backing plate one side is provided with and is located the opening on the backing plate, open-ended area is not less than 1/3 of cavity at horizontal plane projected area.

As a further improvement of the invention, the opening is rectangular or circular.

As a further improvement of the invention, the cavities are provided with pin holes in the transverse direction of the platen, respectively.

As a further improvement of the invention, bolt holes are respectively arranged at the positions close to the edges of the four corners or the two longitudinal side ends of the backing plate.

As a further improvement of the invention, the bolt hole is a long hole or a round hole.

As a further improvement of the invention, the hole ends of the bolt holes are subjected to rounding treatment of R1mm-R5 mm.

As a further improvement of the invention, the hole end of the bolt hole is chamfered by 0.8mm-1.5 mm.

As a further improvement of the invention, the contact plane of the bedplate and the switch rail comprises a hardening section and a basic section, wherein the hardening section is a region for hardening the surface of the bedplate, the hardening section is positioned on the side of the bedplate far away from the iron seat, and the hardening section comprises a recess lower than the basic section and a hardening layer arranged in the recess.

The invention has the beneficial effects that:

according to the invention, the vent hole with a larger opening area is arranged at the bottom of the base plate, so that the casting mold is easier to process, the forming effect is good, the demolding is more convenient while the cavity which is beneficial to shock absorption and deformation is formed at the lower part of the bedplate, and the processing and manufacturing efficiency of the slide plate is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic top view of the present invention;

fig. 2 is a schematic cross-sectional structure of the present invention.

In the figure: the structure comprises a base plate 1, a bedplate 2, a cavity 3, a pin hole 4, an opening 5, a rail bearing groove 6, an iron seat 7 and a bolt hole 8.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, a block-cast slide plate for railway turnout comprises a base plate 1, a platen 2 and an iron base 7 formed by melt-mold casting, wherein the base plate 1, the platen 2 and the iron base 7 are made of cast steel with the performance not lower than ZG270-500, the bottom surface of the base plate 1 is a plane, the platen 2 and the iron base 7 are respectively arranged at two ends of the upper surface of the base plate 1 in the longitudinal direction, a rail bearing groove 6 for accommodating the railway turnout stock rail is formed between the platen 2 and the iron base 7, and when in processing, the bottom surface and the side surface of the rail bearing groove 6 should not have protrusions, and the depth of the recession should not exceed 2 mm; the upper surface of the bedplate 2 is a plane, a sealed cavity 3 is arranged between the bedplate 2 and the backing plate 1, an opening 5 positioned on the backing plate 1 is arranged at one side of the cavity 3 positioned on the backing plate 1, and the area of the opening 5 is not less than 1/3 of the projection area of the cavity 3 on the horizontal plane; further, the opening 5 is rectangular or circular.

In order to ensure the processing quality, the edges and corners of each part of the base plate 1 are clear and regular, and especially the same edges are regular and uniform; the backing plate 1 is subjected to shot blasting and sanding treatment to remove sand sticking and oxide skin; the surface of the base plate 1 should not have the defects of mechanical damage, cracks, slag inclusion, sand adhesion and the like; the casting head of the casting is cleaned from residual roots, fleshiness, flash, wrinkles, burrs and the like, and the thickness of the maximum residual part after polishing is not more than 1 mm.

In this application, the longer direction of the device surface is referred to as the longitudinal direction and the shorter direction is the transverse direction. When the device is used, the device is fixed on a sleeper, a stock rail of a turnout is arranged on the base plate 1 between the bedplate 2 and the iron seat 7, a switch rail of the turnout is arranged on the bedplate 2, and the switch rail slides along the bedplate 2 under the action of a driving device. This device is through setting up the great blow vent of 5 areas of opening in backing plate 1 bottom for when 2 lower parts of platen form the cavity 3 that does benefit to shock attenuation and deformation, the mould is processed more easily, and the shaping is effectual, and the drawing of patterns is more convenient, has improved slide plate's manufacturing efficiency greatly.

As a further development of the invention, the cavities 3 are each provided with a pin hole 4 in the transverse direction of the platen 2.

As a further improvement of the invention, bolt holes 8 are respectively arranged at the positions close to the edges of the four corners or the two longitudinal side ends of the backing plate 1; further, the bolt hole 8 is a long hole or a round hole. Preferably, the hole end of the bolt hole 8 may be rounded at R1mm-R5mm, or chamfered at 0.8mm-1.5 mm.

As a further improvement of the present invention, the contact plane of the bedplate 2 and the tongue rail comprises a hardening section and a basic section, the hardening section is a region for hardening the surface of the bedplate 2, the hardening section is positioned at the side of the bedplate 2 far away from the iron seat 7, and the hardening section comprises a recess lower than the basic section and a hardening layer arranged in the recess.

It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.