Fireproof floor structure for rail vehicle underframe and preparation method thereof

Abstract

The present invention discloses a fireproof floor structure for a rail vehicle chassis and a manufacturing method thereof. The chassis fireproof floor structure includes a bottom load-bearing frame and a floor laid on the bottom load-bearing frame; the bottom load-bearing frame is welded as a whole with carbon steel, including: a rectangular outer frame, a plurality of beams; a hat-shaped fireproof board with the top facing downward is provided between two adjacent beams; the two side walls of the hat-shaped fireproof board are clamped between two adjacent beams, and the two edges of the hat-shaped fireproof board are respectively glued to the upper surfaces of the two adjacent beams, and the top of the hat-shaped fireproof board is located above the lower surface of the beam; the floor is connected to each beam by gluing; and there is a cold-proof and heat-insulating material between the floor and the hat-shaped fireproof board. It can be seen that the present invention is simple and reliable, can withstand structural fire protection, and reduces welding workload, and has cost advantages.

Description

Technical Field

[0001] The invention relates to a fireproof floor structure for a rail vehicle underframe and a preparation method thereof, belonging to an underframe floor structure for a city rail vehicle. Background Art

[0002] With the continuous development of rail vehicle technology, the requirements for vehicle floors are also constantly increasing, and higher standards and requirements are put forward for floors in terms of pyrotechnics, environmental protection, weight, energy saving, safety, sound insulation, vibration reduction, and thermal insulation.

[0003] The invention patent specification of Chinese patent number 01113677.4 and titled "Method for preparing sandwich structure board" discloses a sandwich structure board, wherein the bottom plate and the top plate spraying surface are respectively compounded with honeycomb plate, the bottom plate and the top plate can be aluminum thin plate, and the honeycomb plate is aluminum honeycomb plate. Although this aluminum thin plate sandwich structure board has certain rigidity and strength, it is not ideal for current high-speed trains in terms of vibration reduction, sound insulation and heat preservation performance. The utility model patent specification of Chinese patent number 200920300138.8 discloses a high-speed train plywood floor, including plywood, edge combined aluminum profiles are arranged on both sides of the plywood, floor cloth is uniformly laid on the surface of the plywood and the surface of the combined edge aluminum profile, the plywood, the combined edge aluminum profile and the floor cloth are connected by a vibration reduction adhesive layer, a metal plate is laid on the bottom surface of the plywood, and the plywood and the metal plate are connected by a vibration reduction adhesive layer. The invention patent application with Chinese patent application number 201010165620.2 (application publication number CN101811505A) discloses a motor vehicle floor, the main body of which is made of plywood, rubber sheet, plywood, rubber sheet and plywood glued together. The main bodies of the above-mentioned high-speed train glued floor and motor vehicle floor are plywood, the strength of the floor is poor and the service life is short. The utility model patent specification with Chinese patent application number 200920304644.4 discloses a geothermal floor, in which an electric heating film and a heat insulation layer are respectively arranged from top to bottom in the area surrounded by the upper convex strips between the panel and the bottom plate. Summary of the invention

[0004] The fireproof floor structure for the rail vehicle underframe of the present invention is a simple and reliable underframe structure capable of withstanding structural fire, and reduces welding workload, thus having cost advantages.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0006] A fireproof floor structure for a rail vehicle underframe, comprising a bottom load-bearing frame and a floor laid on the bottom load-bearing frame; the bottom load-bearing frame is welded entirely with carbon steel, comprising: a rectangular outer frame, and a plurality of crossbeams arranged transversely in the rectangular outer frame along the length extension direction of the rectangular outer frame;

[0007] A hat-shaped fireproof board with its top facing downward is provided between two adjacent crossbeams; the two side walls of the hat-shaped fireproof board are clamped between the two adjacent crossbeams, and the two edges of the hat-shaped fireproof board are respectively glued to the upper surfaces of the two adjacent crossbeams, and the top of the hat-shaped fireproof board is located above the lower surface of the crossbeam;

[0008] The floor is connected with each beam by gluing; and cold-proof and heat-insulating materials are arranged between the floor and the hat-shaped fireproof board.

[0009] Furthermore, the fireproof panels are prefabricated from stainless steel plates.

[0010] Furthermore, the cold-proof and heat-insulating material is ceramic fiber.

[0011] Furthermore, the surface of the floor is covered with a floor cloth.

[0012] Furthermore, two edges of the hat-shaped fireproof board are respectively bonded to the upper surfaces of two adjacent beams by adhesive Sika221FR.

[0013] Furthermore, the bottom load-bearing frame is square steel, and ceramic fibers are contained in the square steel.

[0014] Furthermore, both edges of the hat-shaped fireproof board are serrated, and the serrations of the two edges of the hat-shaped fireproof board are staggered; on the same crossbeam, there is a gap between the edge serrations of the two hat-shaped fireproof boards bonded on both sides.

[0015] Another technical object of the present invention is to provide a method for manufacturing a fireproof floor structure of a railway vehicle underframe, comprising the following steps:

[0016] (1) By welding, the square steel pre-filled with ceramic fiber constituting the entire bottom load-bearing frame is assembled into a bottom load-bearing frame;

[0017] (2) placing a hat-shaped stainless steel plate pre-bent from a stainless steel plate between two beams with the top of the hat-shaped stainless steel plate facing downward, and then connecting the edge of the hat-shaped stainless steel plate to the upper part of the beam by gluing;

[0018] (3) A cold-proof and heat-insulating layer made of ceramic fiber is arranged on the top of the hat-shaped stainless steel plate, and the cold-proof and heat-insulating layer can fill the groove of the hat-shaped stainless steel plate;

[0019] (4) Arrange the floor above the cold-proof and heat-insulating layer. The floor can be connected to the beam by gluing, so that the cold-proof and heat-insulating layer can be pressed between the floor and the stainless steel plate;

[0020] (5) Complete laying the floor cloth above the floor.

[0021] According to the above technical solution, compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention adopts a gluing method to bond the fireproof panel set in a hat-shaped structure between two adjacent crossbeams of the bottom load-bearing frame welded by carbon steel. It can be seen that the integral fireproof panel described in the present invention is formed by splicing a plurality of hat-shaped fireproof panels bonded to the crossbeams; at the same time, the floor and the crossbeams can also be connected into one by gluing, and a cold-proof and heat-insulating layer (cold-proof and heat-insulating material) is arranged between the floor and the top surface of the hat-shaped fireproof panel. Therefore, the structural design described in the present invention reduces the workload of vehicle body welding (the main reason is that the fireproof panel is pre-made of stainless steel plate and then bonded to the crossbeam) while meeting the structural fire protection requirements, which can greatly reduce the welding workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 : Partial schematic diagram of the fireproof floor structure for rail vehicle underframe;

[0024] Figure 2 : The bonding structure of the fireproof board on the beam;

[0025] In the figure: 1-floor cloth; 2-floor; 3-cold-proof and heat-insulating layer; 4-fireproof board; 5-bottom load-bearing frame; 6-crossbeam; 7-adhesive. DETAILED DESCRIPTION

[0026] In order to make the purpose and technical solution of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, the entire underframe structure for the fireproof floor structure of the underframe of a rail vehicle according to the present invention is composed of a bottom load-bearing frame 5, a fireproof board 4, a cold-proof and heat-insulating layer 3, a floor 2, and a floor cloth 1. Among them:

[0028] The bottom load-bearing frame is welded as a whole by carbon steel (square steel). Carbon steel itself can withstand high temperatures above 1000 degrees, providing a basis for the fireproof performance of the bottom frame fireproof board structure, including: a rectangular outer frame, and a plurality of cross beams 6 arranged transversely in the rectangular outer frame along the length extension direction of the rectangular outer frame; in order to improve the cold-proof and heat-insulating performance of the cross beams, the present invention can pre-stuff cold-proof materials such as ceramic fibers in the cross beams.

[0029] In order to make the space between two adjacent beams have fireproof performance, the present invention sets a hat-shaped fireproof board with the top facing downward between the two adjacent beams, and the two side walls of the hat-shaped fireproof board are clamped between the two adjacent beams, and the two edges of the hat-shaped fireproof board are respectively glued to the upper surfaces of the two adjacent beams with adhesive 7 (adhesive Sika221FR can be selected), and the top of the hat-shaped fireproof board is located above the lower surface of the beam. In order to improve the bonding ability between the edge of the hat-shaped fireproof board and the beam, and at the same time, to leave enough blank space on the beam for bonding the floor, the two edges 44 of the hat-shaped fireproof board described in the present invention are both serrated 42 / 43, and the serrations of the two edges of the hat-shaped fireproof board are staggered, so that on the same beam, there is a gap 61 between the edge serrations of the two hat-shaped fireproof boards bonded on both sides. The gap 61 is the part where the floor and the beam are directly bonded by adhesive, and the gap between the edge serrations of the two hat-shaped fireproof boards bonded on both sides of the same beam can enclose a space that will not overflow, which is used to hold a certain amount of adhesive, which can improve the bonding performance between the floor and the beam on the one hand, and facilitate the bonding operation between the floor and the beam on the other hand. In addition, setting the edge of the fireproof board to be serrated can improve the bonding adhesion between the edge of the fireproof board and the beam through the adhesive.

[0030] The fireproof board of the present invention is a stainless steel bent board, which is pre-processed and then integrally bonded, reducing the welding workload and meeting the structural fire protection requirements. The stainless steel fireproof board has a flexible shape and can adapt to the vehicle frame structure, and the cap-shaped bonding installation can save installation time and has high reliability.

[0031] The floor can be a phenolic foam floor connected to each beam by gluing; and a cold-proof and heat-insulating layer made of cold-proof and heat-insulating material is provided between the floor and the top of the cap-shaped fireproof board, and the thickness of the cold-proof and heat-insulating material can be adjusted as needed. The shape of the floor can adapt to the shape of the vehicle body structure.

[0032] In summary, it can be seen that the vehicle underframe fireproof floor structure of the present invention is as follows: Figure 2 As shown, the fireproof board is glued to the crossbeam of the chassis, which has good sound insulation and heat insulation effects, and the sound insulation and heat insulation can be optimized by adjusting the thickness of the floor. The entire chassis can meet the ASTM E 119 structural fire protection requirements of 15 minutes.

[0033] In order to obtain the above-mentioned vehicle underframe fireproof floor structure, the present invention adopts the following manufacturing method, comprising the following steps:

[0034] (1) By welding, the square steel pre-filled with ceramic fiber constituting the entire bottom load-bearing frame is assembled into a bottom load-bearing frame;

[0035] (2) placing a hat-shaped stainless steel plate pre-bent from a stainless steel plate between two beams with the top of the hat-shaped stainless steel plate facing downward, and then connecting the edge of the hat-shaped stainless steel plate to the upper part of the beam by gluing;

[0036] (3) A cold-proof and heat-insulating layer made of ceramic fiber is arranged on the top of the hat-shaped stainless steel plate, and the cold-proof and heat-insulating layer can fill the groove of the hat-shaped stainless steel plate (i.e., the convex top of the hat-shaped fireproof plate);

[0037] (4) Arrange the floor above the cold-proof and heat-insulating layer. The floor can be connected to the beam by gluing, so that the cold-proof and heat-insulating layer can be pressed between the floor and the stainless steel plate;

[0038] (5) Complete laying the floor cloth above the floor.

[0039] The above is only an embodiment of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A fireproof floor structure for a rail vehicle underframe, comprising a bottom load-bearing frame and a floor laid on the bottom load-bearing frame; characterized in that: The bottom load-bearing frame is welded with carbon steel as a whole, and includes: a rectangular outer frame, and a plurality of crossbeams arranged in the rectangular outer frame in a transverse direction along the length extension direction of the rectangular outer frame; A hat-shaped fireproof board with its top facing downward is provided between two adjacent crossbeams; the two side walls of the hat-shaped fireproof board are clamped between the two adjacent crossbeams, and the two edges of the hat-shaped fireproof board are respectively glued to the upper surfaces of the two adjacent crossbeams, and the top of the hat-shaped fireproof board is located above the lower surface of the crossbeam; The floor is connected to each beam by gluing; and there is cold-proof and heat-insulating material between the floor and the hat-shaped fireproof board; The two edges of the hat-shaped fireproof board are both serrated, and the serrations of the two edges of the hat-shaped fireproof board are staggered; on the same crossbeam, there is a gap between the edge serrations of the two hat-shaped fireproof boards bonded on both sides.

2. A fireproof floor structure for a rail vehicle underframe according to claim 1, characterized in that: The fireproof panels are prefabricated from stainless steel plates.

3. A fireproof floor structure for a rail vehicle underframe according to claim 1 or 2, characterized in that: The cold-proof and heat-insulating material is ceramic fiber.

4. A fireproof floor structure for a rail vehicle underframe according to claim 1 or 2, characterized in that: The surface of the floor is covered with a floor cloth.

5. A fireproof floor structure for a rail vehicle underframe according to claim 1 or 2, characterized in that: The two edges of the hat-shaped fireproof board are respectively bonded to the upper surfaces of the two adjacent beams by the adhesive Sika221FR.

6. A fireproof floor structure for a rail vehicle underframe according to claim 1 or 2, characterized in that: The bottom load-bearing frame is square steel with ceramic fibers inside.

7. A method for manufacturing a fireproof floor structure for a rail vehicle underframe according to claim 1, characterized in that: The following steps are involved: (1) By welding, the square steel pre-filled with ceramic fiber constituting the entire bottom load-bearing frame is assembled into a bottom load-bearing frame; (2) placing a hat-shaped stainless steel plate pre-bent from a stainless steel plate between two beams with the top of the hat-shaped stainless steel plate facing downward, and then connecting the edge of the hat-shaped stainless steel plate to the upper part of the beam by gluing; (3) A cold-proof and heat-insulating layer made of ceramic fiber is arranged on the top of the hat-shaped stainless steel plate, and the cold-proof and heat-insulating layer can fill the groove of the hat-shaped stainless steel plate; (4) Arrange the floor above the cold-proof and heat-insulating layer. The floor can be connected to the beam by gluing, so that the cold-proof and heat-insulating layer can be pressed between the floor and the stainless steel plate; (5) Finish laying the floor cloth on top of the floor.

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