CN111074699A - Novel composite splint adhesive rail freezing joint and construction method thereof - Google Patents
Novel composite splint adhesive rail freezing joint and construction method thereof Download PDFInfo
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- CN111074699A CN111074699A CN202010014105.8A CN202010014105A CN111074699A CN 111074699 A CN111074699 A CN 111074699A CN 202010014105 A CN202010014105 A CN 202010014105A CN 111074699 A CN111074699 A CN 111074699A
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- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Abstract
The invention relates to a novel composite clamp plate adhesive rail freezing joint which comprises a composite clamp plate and a bolt, wherein the composite clamp plate comprises a clamp plate body and a composite adhesive layer, the inner side surface of the clamp plate body is attached to a rail jaw, a rail waist and a rail bottom of the rail joint body, the composite adhesive layer comprises glass fiber cloth and a first normal temperature curing adhesive layer, the front side and the back side of the glass fiber cloth are covered by the first normal temperature curing adhesive layer, and one side surface of the composite adhesive layer is adhered to the inner side surface of the clamp plate body; the second normal temperature curing adhesive layer is respectively adhered with the composite adhesive layer and the rail jaw, the rail web and the rail bottom of the steel rail joint body; the composite splint further comprises a conductive adhesive layer, the conductive adhesive layer is adhered to the inner side surface of the splint body, notches are reserved at two ends of the composite adhesive layer, and the conductive adhesive layer fills the notches; the both sides of rail joint body are all glued and are equipped with compound splint, and the bolt passes compound splint, rail joint body from left to right in proper order, and the bolt other end that exposes is equipped with packing ring and nut, and the bolt is evenly set up along compound splint length direction interval.
Description
Technical Field
The invention relates to the technical field of railways, in particular to a novel composite splint adhesive steel rail freezing joint and a construction method thereof.
Background
By 2018, the total railway operation mileage in China is 13.1 kilometers, wherein 3.02 kilometers of high-speed railways and 10.08 kilometers of ordinary-speed railways, and a large number of fixed turnouts are adopted as turnouts on the ordinary-speed railways. The method is characterized in that the method is implemented by the Chinese railway general company in 2019, 4 and 1 (No. 34 of the general engineering and power of iron), and the specifications 3.9.16 and 3.10.4 of the general speed railway line repair rule published by the Chinese railway publisher, wherein the front and rear 4 joints of the high manganese steel frog can adopt frozen joints, the other joints are all welded with … … fixed turnout frozen joints by adopting high-strength bolts, and the torque is kept at 1100-1400 Nm. From the above specifications, it can be seen that the rail joints of fixed turnouts are largely common high-strength bolt freezing joints. The radius of the curve of the ordinary speed railway is equal to or less than 800m, because the curve outer strand steel rail is worn and the curve inner strand steel rail is crushed, the service life of the steel rail is short, and the steel rail needs to be frequently replaced, so that the welding of the steel rail joint is abandoned, and the common steel rail frozen joint has to be adopted at present. According to the regulations of the repair rules of the ordinary railway lines, the high-strength bolts are adopted for the freezing joints, and the torque is kept to be 1100-1400 Nm. The overall shear strength of the ordinary rail frozen joint is completely provided by the pretension force P of the high-strength bolt and the sliding friction factor mu between the steel clamping plate and the rail. The pretension force P of a high-strength bolt with a performance grade of 10.9 is 250-300 kN according to the regulation of TB/T2347-93, the sliding friction factor mu of steel to steel is far less than 1, and even if the mu is 1, the integral shear strength F of the ordinary steel rail freezing joint cannot exceed 750-900 kN. In addition, the field operation process of the welding joint is complex, the steel rail should be sawed during failure repair, and the stress of the seamless line should be diffused or adjusted, so that the repair is surgical. The assembly of the common steel rail freezing joint and the repair after failure are simple and easy, the operation is complex, M24 and a high-strength bolt with the length of 160mm are adopted, the pretension P reaches 250-300 kN, and the tensile deformation delta generated by the bolt is 0.54-0.65 mm. That is, in the operation process, the abrasion between the clamping plate and the steel rail causes the corrosion or the metal falling, the pretension of the bolt is also reduced, even if 0.06mm metal powder falls, the pretension of the bolt is attenuated by 30kN, which is most likely to happen in the initial stage of the assembly or repair of the frozen joint, so that a worker should frequently and repeatedly tighten the bolt in a considerable period, especially in a low-temperature season, the pretension of the bolt is attenuated by slight negligence, the bolt is sheared and broken by the dislocation of the steel rail and the clamping plate, and the driving safety is threatened.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a novel composite splint adhesive rail freezing joint which is remarkably improved in strength, remarkably reduced in pulling rate and breaking rate and high in reliability and a construction method thereof.
Therefore, the adopted technical scheme is that the novel composite clamp plate adhesive steel rail freezing joint comprises a composite clamp plate and a bolt, wherein the composite clamp plate comprises a clamp plate body and a composite adhesive layer, the inner side surface of the clamp plate body is attached to a rail jaw, a rail waist and a rail bottom of the steel rail joint body, the composite adhesive layer comprises glass fiber cloth and a first normal temperature curing adhesive layer, the front side and the back side of the glass fiber cloth are covered by the first normal temperature curing adhesive layer, and one side surface of the composite adhesive layer is adhered to the inner side surface of the clamp plate body; a second normal-temperature curing adhesive layer is arranged on the other side surface of the composite adhesive layer and is respectively adhered to the composite adhesive layer and the rail jaw, the rail web and the rail bottom of the steel rail joint body;
the composite splint further comprises a conductive adhesive layer, the conductive adhesive layer is adhered to the inner side surface of the splint body, gaps are reserved at two ends of the composite adhesive layer, and the gaps are filled with the conductive adhesive layer;
the steel rail joint is characterized in that the rail jaws, the rail waist and the rail bottoms on the two sides of the steel rail joint body are all glued with the composite clamping plates, the bolts sequentially penetrate through the composite clamping plates, the steel rail joint body and the composite clamping plates from left to right, the other ends of the exposed bolts are provided with gaskets and nuts, and the bolts are arranged along the length direction of the composite clamping plates at even intervals.
Preferably, the bolt is a high-strength phosphated and saponified bolt.
Preferably, the end parts of the two steel rail joint bodies are butted and stuck with a conductive adhesive layer.
Preferably, the top end of the outer side surface of the splint body is provided with a chamfer.
A construction method of a novel composite splint adhesive rail freezing joint comprises the following steps:
step S10, prefabricating the composite splint in a factory: the composite clamp plate comprises a clamp plate body and glass fiber cloth, the clamp plate body is of a variable cross section, and the inner side surface of the clamp plate body is attached to the rail jaw, the rail waist and the rail bottom of the steel rail joint body;
step S11, coating normal temperature curing glue on the front and back surfaces of the glass fiber cloth to form a first normal temperature curing glue layer, and then sticking the first normal temperature curing glue layer on the inner side surface of the splint body;
step S12, reserving gaps at two ends of a composite adhesive layer made of glass fiber cloth and a first normal temperature curing adhesive layer, and smearing conductive adhesive on the gaps to the inner side face of the splint body;
and S13, assembling the composite splint with the conductive adhesive, the glass fiber cloth and the normal-temperature curing adhesive adhered to the composite splint with the mold, demolding after the conductive adhesive and the normal-temperature curing adhesive are cured, and finishing the prefabrication of the composite splint in a factory after the inspection is qualified.
Step S20, the operation of gluing and assembling the rail freezing joint on site comprises the following steps:
step S21, polishing and decontaminating the upper surfaces of the rail jaw, the rail web and the rail bottom of the steel rail joint body which needs to be glued and frozen; the rail gap is tightly propped, and the steel rail joint body is smoothly adjusted;
step S22, coating conductive adhesive on the set position of the steel rail joint body, corresponding to the position of the composite splint coated with the conductive adhesive;
step S23, respectively coating on-site normal-temperature quick-setting glue on the rail waists on the two sides of the steel rail joint body and the composite clamping plate, but not coating the normal-temperature quick-setting glue on the conductive glue of the composite clamping plate; after the normal-temperature quick-setting adhesive is uniformly coated, a second normal-temperature setting adhesive layer is formed, and the composite clamp plate is assembled with the steel rail joint body; penetrating a bolt into a bolt hole of the composite clamping plate, and fastening and tightening the bolt by using a spanner after a washer and a nut are installed to meet the requirement that the torque reaches 1400 Nm; checking and accepting, and finishing the on-site gluing and freezing operation after meeting the qualified requirement.
Preferably, the bolt is a high-strength phosphated and saponified bolt.
Preferably, step S22 further includes applying a conductive adhesive to the butt joint between the ends of the two rail joint bodies.
The technical scheme of the invention has the following advantages:
1. the invention provides a composite splint adhesive rail freezing joint and a construction method thereof, which provide a new technical scheme and equipment for fixed turnouts on a common speed railway and the seamless curve with the radius equal to or less than 800m, and experiments prove that: compared with the frozen rail joint adopted by the current regulation of the repair rule of the ordinary railway line, the frozen adhesive rail joint manufactured by the invention has the advantages of obviously improved strength, obviously reduced pulling rate and breakage rate and strong reliability, and even compared with a welded joint, the static bending, fatigue strength and the drop hammer hammering frequency are equal to or higher than the test standard of the flash welding of the rail welding. Although the assembly process is strict, the process is simple, and the assembly, the field assembly and the failure repair are convenient and fast for technicians. And the frozen joint of the glued steel rail adopts the conductive adhesive at the set position, and can ensure the smoothness of a track circuit all the day without electrical connection wires, thereby ensuring the driving safety.
2. The invention provides a composite splint adhesive steel rail freezing joint and a construction method thereof, which create safe and reliable necessary conditions for seamless curve lines with radius equal to or less than 800m of fixed turnouts of a common speed railway, overcome the defects in the prior art, reduce the loss of steel rails and accessories, save Energy consumption, be beneficial to environmental protection and improve the reliability of driving safety, and belong to the innovative technology of 4E (low-cost Econboics, Energy-saving Energy, environmental, pollution-free Environment and high-performance Excellence).
3. The shear strength б of the adopted normal-temperature quick-setting glue is stabilized at 40-45 Mpa, the gluing area A of the composite clamp plate is more than or equal to 1512cm2, the process coefficient psi is 0.6, the integral shear strength F of the composite clamp plate gluing freezing joint is 3628.8-4082.4 kN, and is far greater than the integral shear strength of the common rail freezing joint, and in terms of static bending strength and fatigue strength, because the vertical rigidity of the composite clamp plate design is increased to reach 36% of the vertical rigidity of the steel rail body, the composite clamp plate and the steel rail glue have extremely strong bonding force, and the vertical rigidity of the composite clamp plate and the steel rail body is 1.36 times of the vertical rigidity of the steel rail welding joint, so that the composite clamp plate gluing freezing joint can achieve and exceed the inspection standard of TB/T1632.3-2005 steel rail welding aluminum joint, the inspection value is further higher than the inspection value of the common rail freezing joint, the high-strength bolt adopting phosphating treatment can fasten the composite clamp plate and the steel rail, the torque coefficient is 0.15, the composite clamp plate gluing joint is higher than the TB torque coefficient of the TB/T1632.3-2005 steel rail welding aluminum joint, and the bolt can not reduce the safe shearing torque of the rail joint, and the joint even if the steel rail joint is used for the same as the high-23% of the rail joint, and the steel rail joint can be ensured.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a front view of a novel composite clamp plate glued rail freezing joint provided by the present invention;
FIG. 2 is a cross-sectional view A-A shown in FIG. 1;
11-a rail joint body; 12-a splint body; 13-a bolt; 14-a composite glue layer; 15-second normal temperature curing adhesive layer; 16-conductive adhesive layer.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present 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.
A novel composite clamp plate adhesive steel rail freezing joint is shown in figures 1 and 2 and comprises a composite clamp plate and a bolt 13, wherein the composite clamp plate comprises a clamp plate body 12 and a composite adhesive layer 14, the inner side surface of the clamp plate body 12 is attached to a rail jaw, a rail waist and a rail bottom of a steel rail joint body 11, the composite adhesive layer 14 comprises glass fiber cloth and a first normal temperature curing adhesive layer, the front side and the back side of the glass fiber cloth are covered by the first normal temperature curing adhesive layer, and one side surface of the composite adhesive layer 14 is adhered to the inner side surface of the clamp plate body 12; a second normal temperature curing adhesive layer 15 is arranged on the other side surface of the composite adhesive layer 14, and the second normal temperature curing adhesive layer 15 is respectively adhered to the composite adhesive layer 14 and the rail jaw, the rail web and the rail bottom of the steel rail joint body 11; the composite splint further comprises a conductive adhesive layer 16, the conductive adhesive layer is adhered to the inner side surface of the splint body, notches are reserved at two ends of the composite adhesive layer 14, and the notches are filled with the conductive adhesive layer; the rail jaw, the rail waist and the rail bottom of the two sides of the steel rail joint body 11 are all glued with the composite clamping plate, the bolt 13 sequentially penetrates through the composite clamping plate, the steel rail joint body 11 and the composite clamping plate from left to right, the other end of the exposed bolt is provided with a washer and a nut, and the bolt is arranged along the length direction of the composite clamping plate at even intervals. The splint body 12 can be made of heat-treated No. 55 steel, has enough rigidity and strength, and can safely bear the repeated action of various train loads on a common-speed railway; the composite glue layer 14 can be formed by coating normal-temperature curing glue on the front and back surfaces of the glass fiber cloth in a factory, the normal-temperature curing glue is used for forming a first normal-temperature curing glue layer in the factory, the composite glue layer 14 can be glued on the inner side surface of the clamp plate body 12, the composite clamp plate glued with the conductive glue layer 16 and the composite glue layer 14 is assembled with a mold, the mold is removed after the adhesive is cured under the conditions of certain curing temperature and curing time, and the prefabrication of the composite clamp plate in the factory is completed after the inspection is qualified. The clamp plate body 12 can be symmetrically arranged on two sides of the steel rail joint body, and the inner side surface of the clamp plate body 12 is attached to the rail jaw, the rail waist and the rail bottom of the steel rail joint body, so that the gluing area of the composite clamp plate is further increased; during on-site operation, the two sides of the steel rail joint body and the composite clamping plate are respectively coated with on-site normal-temperature quick-setting glue, but the normal-temperature quick-setting glue cannot be coated on the conductive glue of the composite clamping plate; and after the normal-temperature quick-setting glue is uniformly coated, forming a second normal-temperature setting glue layer 15, gluing the composite clamping plate on the steel rail joint body, then penetrating a bolt through the composite clamping plate, the steel rail joint body and the composite clamping plate on the other side, arranging a gasket and a nut at the other end of the exposed bolt, and fastening and retightening the nut by using a spanner, namely completing the field assembly operation of the composite clamping plate gluing frozen joint.
The steel cleat body 12 generally takes the shape shown in fig. 2, but the shape is slightly changed for special use conditions, such as: the thickness tolerance of the rail web at the heel end of the manganese steel frog is large, and the clamp plate body 12 is processed into a variable thickness section; the first normal temperature curing adhesive layer and the second normal temperature curing adhesive layer 15 can be made of epoxy structural adhesive, have extremely high lasting bonding force with steel adhesion, and are water-resistant, ageing-resistant, non-toxic and environment-friendly; the glass fiber cloth can adopt alkali-free, wax-free, untwisted, high mechanical strength, water resistance and aging resistance; the conductive adhesive layer can be made of conductive adhesive with certain bonding strength, the conductivity is less than 2.7 multiplied by 10 < -8 > omega.m, the water-resistant, aging-resistant and corrosion-resistant conductive adhesive is coated on the inner side surface of the splint body 12, the conductive adhesive layer can be arranged at two ends of the splint body 12, and gaps are reserved at corresponding positions of the composite adhesive layer, namely the composite adhesive layer is not covered on the inner side surface of the splint body 12.
When the rail joint body on the railway is a CHN60 rail, the composite clamp plate is glued with the CHN60 rail joint body, and the gluing area can reach at least 1512cm2The lowest shearing strength of the epoxy structural adhesive is 40MPa, theoretically, if the process coefficient reaches 1, the lowest value of the tensile failure load of the CHN60 steel rail and the composite splint adhesive frozen joint is 6048kN, the welding area of the CHN60 steel rail welding joint is only 77.45cm2, the ultimate strength of the steel rail thermit welding joint is 70% of the ultimate strength of the steel rail parent metal, namely 731.5MPa, and the tensile failure load is 5665.5kN, so that the tensile failure load value of the composite splint adhesive frozen joint is higher than the value of the steel thermit welding joint even if the tensile strength of the two steel splint bodies is not counted. It can thus be predicted that the use of composite plywood adhesive frozen joints on railways is substantially safer and more reliable than the rail thermite joints which are used in large numbers on current railways.
The bolt is a high-strength phosphorization saponification processing bolt. The high-strength bolt subjected to phosphating and saponification treatment is compared with bolts with the same strength grade, and can provide larger pretightening force under the condition of the same torque, improve the adhesive strength of the composite clamping plate and the steel rail joint body, and ensure safety and reliability.
And the end parts of the two steel rail joint bodies are butted and stuck with a conductive adhesive layer. The conductive adhesive is an epoxy adhesive which is compatible with conductive adhesives used for manufacturing composite clamping plates in factories, has low resistivity, durable corrosion resistance, water resistance, aging resistance, no toxicity and environmental protection, and can ensure the smoothness of a track circuit all the day by coating the conductive adhesive on the butt joint of the end parts of the two steel rail joint bodies on site without an electric connecting wire.
The composite clamping plate is applied to a section with serious abrasion of a curved steel rail, and in order to prevent wheels from impacting the composite clamping plate when a train passes through, the top end of the outer side surface of the clamping plate body is preferably provided with a chamfer.
A construction method of a novel composite splint adhesive rail freezing joint comprises the following steps:
step S10, prefabricating the composite splint in a factory: the composite clamp plate comprises a clamp plate body and glass fiber cloth, the clamp plate body is of a variable cross section, and the inner side surface of the clamp plate body is attached to the rail jaw, the rail waist and the rail bottom of the steel rail joint body;
step S11, coating normal temperature curing glue on the front and back surfaces of the glass fiber cloth, and then adhering the glass fiber cloth to the inner side surface of the splint body;
step S12, reserving gaps at two ends of the glass fiber cloth, and smearing conductive adhesive on the gaps to the inner side surface of the splint body;
and S13, assembling the composite splint with the conductive adhesive, the glass fiber cloth and the normal-temperature curing adhesive adhered to the composite splint with the mold, demolding after the conductive adhesive and the normal-temperature curing adhesive are cured, and finishing the prefabrication of the composite splint in a factory after the inspection is qualified.
Step S20, the operation of gluing and assembling the rail freezing joint on site comprises the following steps:
step S21, polishing and decontaminating the upper surfaces of the rail jaw, the rail web and the rail bottom of the steel rail joint body which needs to be glued and frozen; the rail gap is tightly propped, and the steel rail joint body is smoothly adjusted;
step S22, coating conductive adhesive on the set position of the steel rail joint body, corresponding to the position of the composite splint coated with the conductive adhesive;
step S23, respectively coating on-site normal-temperature quick-setting glue on the rail waists on the two sides of the steel rail joint body and the composite clamping plate, but not coating the normal-temperature quick-setting glue on the conductive glue of the composite clamping plate; after the normal-temperature quick-setting adhesive is uniformly coated, the composite clamping plate is assembled with the steel rail joint body; penetrating a bolt into a bolt hole of the composite clamping plate, and fastening and tightening the bolt by using a spanner after a washer and a nut are installed to meet the requirement that the torque reaches 1400 Nm; checking and accepting, and finishing the on-site gluing and freezing operation after meeting the qualified requirement.
The bolt is a high-strength phosphorization saponification processing bolt.
Step S22 further includes applying conductive adhesive to the butt joint of the ends of the two rail joint bodies.
The normal-temperature fast-curing glue used in the step S23 has extremely strong durable bonding force, water resistance, aging resistance, no toxicity and environmental protection when being bonded with steel, and is compatible with a normal-temperature curing glue used for a composite splint prefabricated in a factory and an epoxy adhesive, and has the same strength and higher curing rate.
The working principle is as follows:
(1) prefabricating the composite splint in a factory: the method comprises the steps of manufacturing a composite clamping plate, adding glass fiber cloth, wherein the glass fiber cloth does not cover the adhesive surface of a steel clamping plate completely, leaving a vacancy with a certain area at a set position, coating conductive adhesive on the adhesive surface of the steel clamping plate at the vacancy, coating normal-temperature curing adhesive on the front surface and the back surface of the glass fiber cloth, adhering the glass fiber cloth and the glass fiber cloth to the adhesive surface of the steel clamping plate, assembling the composite clamping plate on which the conductive adhesive, the glass fiber cloth and the normal-temperature curing adhesive are adhered with a mold, demolding after the adhesive is cured under the conditions of a certain curing temperature and curing time, and finishing prefabrication of the composite clamping plate in a factory after the adhesive is qualified.
(2) And (3) gluing and assembling the steel rail freezing joint on site: firstly, polishing and decontaminating the upper surfaces of a rail jaw, a rail web and a rail bottom of a rail joint body which is glued and frozen; the rail gap is tightly propped, and the steel rail joint body is smoothly adjusted; coating conductive adhesive on a set position of the steel rail joint body; respectively coating normal-temperature quick-setting glue on the steel rail joint body and the composite clamping plate, but not coating the normal-temperature quick-setting glue on the conductive glue of the composite clamping plate; after the normal-temperature quick-setting adhesive is uniformly coated, the composite clamping plate is assembled with the steel rail joint body; penetrating a phosphorized and saponified high-strength bolt into a bolt hole of the composite clamping plate, installing a washer and a nut, and fastening and tightening the nut by using a wrench, wherein the torque is required to reach 1400 Nm; checking and accepting, and finishing the field gluing and freezing operation only after the requirement is met.
The invention has the important innovation that a composite clamp plate is manufactured by compounding a steel clamp plate body with 4 materials with different material characteristics, namely normal curing glue, glass fiber cloth and conductive adhesive, in a factory, 4 materials with different material characteristics, namely ① steel clamp plate has enough rigidity and strength and can safely bear the repeated action of loads of various trains on a common-speed railway, ② normal-temperature curing glue belongs to epoxy structural glue and has extremely high lasting bonding force and water-proof, ageing-resistant, non-toxic and environment-friendly adhesive with steel bonding, ③ glass fiber cloth belongs to alkali-free, wax-free, twist-free, high mechanical strength, water-proof and ageing-resistant glass fiber cloth, ④ conductive adhesive has certain bonding strength, has a resistance rate of less than 2.7 multiplied by 10-8 omega.m, is water-proof, ageing-resistant, 4 different materials are compounded and prefabricated into a composite clamp plate with 4 different material characteristics, and indicates that the necessity of adding the glass fiber cloth to the prefabricated composite clamp plate is realized, the bonding strength of the glass fiber cloth, the liquid adhesive is prevented by the glass fiber cloth, the loss of the glass fiber cloth, the energy is increased, the bonding strength is improved, the bonding strength of a composite clamp plate is ensured, the equivalent to the normal-temperature curing glue line, the normal-temperature curing glue, the bonding strength of a steel rail, the normal-temperature curing glue, the normal-temperature curing glue, the normal-temperature curing glue, the normal-temperature curing glue, the normal.
The benefits of the invention are as follows: the total unit price is 4500 yuan, the total unit price of the frozen joint of the steel rail glued by the composite splint is 2500 yuan, if the joint of the heel end of the manganese steel frog and the high-carbon steel rail cannot be directly welded, a chromium-based medium is additionally welded, the labor cost is higher, if the frozen joint of a common high-strength bolt is adopted according to the regulation of the repair rule of the ordinary railway line, the safety and reliability are poor, and the cost of maintenance is high. Obviously, the invention has better social benefit and economic benefit.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (7)
1. The novel composite clamp plate adhesive steel rail freezing joint is characterized by comprising a composite clamp plate and a bolt (13), wherein the composite clamp plate comprises a clamp plate body (12) and a composite adhesive layer (14), the inner side surface of the clamp plate body (12) is attached to a rail jaw, a rail waist and a rail bottom of a steel rail joint body (11), the composite adhesive layer (14) comprises glass fiber cloth and a first normal-temperature curing adhesive layer, the front side and the back side of the glass fiber cloth are covered by the first normal-temperature curing adhesive layer, and one side surface of the composite adhesive layer (14) is adhered to the inner side surface of the clamp plate body (12); a second normal-temperature curing adhesive layer (15) is arranged on the other side surface of the composite adhesive layer (14), and the second normal-temperature curing adhesive layer (15) is respectively adhered to the composite adhesive layer (14) and the rail jaw, the rail web and the rail bottom of the steel rail joint body (11);
the composite splint further comprises a conductive adhesive layer (16), the conductive adhesive layer is adhered to the inner side surface of the splint body, gaps are reserved at two ends of the composite adhesive layer (14), and the gaps are filled with the conductive adhesive layer;
the rail jaw, the rail waist and the rail bottom of both sides of rail joint body (11) are all glued and are equipped with compound splint, bolt (13) pass in proper order from left to right compound splint, rail joint body (11) and compound splint, and the bolt other end that exposes is equipped with packing ring and nut, the bolt is followed compound splint length direction interval evenly sets up.
2. The composite clamp glued rail freezing joint of claim 1, wherein said bolts are high strength phosphated and saponified bolts.
3. The composite clamp plate glued rail freezing joint as claimed in claim 1, wherein the ends of the two rail joint bodies are butt-jointed and glued with a conductive glue layer.
4. The composite plywood rail freezing joint of claim 1, wherein said plywood body has a chamfer on the top of its outer side.
5. A construction method for gluing a steel rail freezing joint by a novel composite splint is characterized by comprising the following steps:
step S10, prefabricating the composite splint in a factory: the composite clamping plate comprises a clamping plate body and glass fiber cloth, and the inner side surface of the clamping plate body is attached to the rail jaw, the rail waist and the rail bottom of the steel rail joint body;
step S11, coating normal temperature curing glue on the front and back surfaces of the glass fiber cloth to form a first normal temperature curing glue layer, and then sticking the first normal temperature curing glue layer on the inner side surface of the splint body;
step S12, reserving gaps at two ends of a composite adhesive layer made of glass fiber cloth and a first normal temperature curing adhesive layer, and smearing conductive adhesive on the gaps to the inner side face of the splint body;
and S13, assembling the composite splint with the conductive adhesive, the glass fiber cloth and the normal-temperature curing adhesive adhered to the composite splint with the mold, demolding after the conductive adhesive and the normal-temperature curing adhesive are cured, and finishing the prefabrication of the composite splint in a factory after the inspection is qualified.
Step S20, the operation of gluing and assembling the rail freezing joint on site comprises the following steps:
step S21, polishing and decontaminating the upper surfaces of the rail jaw, the rail web and the rail bottom of the steel rail joint body which needs to be glued and frozen; the rail gap is tightly propped, and the steel rail joint body is smoothly adjusted;
step S22, coating conductive adhesive on the set position of the steel rail joint body, corresponding to the position of the composite splint coated with the conductive adhesive;
step S23, respectively smearing on-site normal-temperature quick-setting glue on the rail jaws, the rail waist and the upper surface of the rail bottom on the two sides of the steel rail joint body and the composite clamping plate, but not smearing the normal-temperature quick-setting glue on the conductive glue of the composite clamping plate; after the normal-temperature quick-setting adhesive is uniformly coated, a second normal-temperature setting adhesive layer is formed, and the composite clamp plate is assembled with the steel rail joint body; penetrating a bolt into a bolt hole of the composite clamping plate, and fastening and tightening the bolt by using a spanner after a washer and a nut are installed to meet the requirement that the torque reaches 1400 Nm; checking and accepting, and finishing the on-site gluing and freezing operation after meeting the qualified requirement.
6. The construction method according to claim 5, wherein the bolt is a high-strength phosphated and saponified bolt.
7. The construction method according to claim 5, wherein step S22 further includes applying conductive adhesive to the butt joint of the ends of the two rail joint bodies.
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| RU179653U1 (en) * | 2017-11-24 | 2018-05-21 | Общество с ограниченной ответственностью Научно-производственное предприятие "Прикладные перспективные технологии - АпАТэК" | Metal composite overlay of Kleebolt insulating joint |
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Application publication date: 20200428 |