Premixed spray quenching system for steel rail

A technology of spray cooling and quenching system, applied in quenching device, track, track maintenance and other directions, can solve the problems of high energy consumption, high processing cost, high noise, etc., to ensure the quality of quenching, low processing cost and low energy consumption. Effect

Active Publication Date: 2013-01-30
CHINA NAT HEAVY MACHINERY RES INSTCO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it has weak cooling and small adjustment range (1~5°C / s), which is not suitable for quenching standard carbon steel rails, especially for on-line quenching of steel rails, with high noise, high energy consumption and high processing costs

Method used

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  • Premixed spray quenching system for steel rail
  • Premixed spray quenching system for steel rail
  • Premixed spray quenching system for steel rail

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The spray cooling and quenching system of the premixed rail is an improvement on the spray cooling and quenching equipment.

[0024] The original blast cooling and quenching equipment directly sprays compressed air from the air inlet pipe 2 through the air outlet 3 at the end of the air inlet pipe 2 to cool the steel rails. There are six air outlets 3 of the original air jet cooling and quenching equipment, which are respectively located above the rail head tread 5 , on both sides of the rail head 4 , on both sides of the rail waist 6 and below the rail bottom 7 .

[0025] Its improvement method is to set several groups of atomizing and humidifying nozzles 1 on the air inlet pipe 2 of the jet cooling and quenching equipment.

[0026] Such as figure 1 As shown, the air inlet pipe 2 selects the main air inlet pipe, and the atomizing and humidifying nozzle 1 is a single-medium centrifugal atomizing nozzle. The air main is connected and sealed.

[0027] The atomized wate...

Embodiment 2

[0029] The structure of this embodiment is basically the same as that of Embodiment 1, the difference is that the air inlet duct 2 selects the air inlet branch pipe, and the number of atomizing and humidifying nozzles 1 is in groups.

[0030] Such as figure 2 As shown, the atomizing and humidifying nozzle 1 is a single-medium centrifugal atomizing nozzle, and four atomizing and humidifying nozzles 1 are gathered at one point to form a group, and are connected and sealed with the air inlet branch pipe through bolts and flanges.

[0031] The atomized water mist is sprayed into the air inlet branch pipe from the atomization humidification nozzle 1 through the pipeline, and after mixing with the compressed air in the air inlet branch pipe, the air outlet 3 connected to the air inlet branch pipe at each place will spray the air containing the water mist. Compressed air is blown onto the rails.

Embodiment 3

[0033] The structure of this embodiment is basically the same as that of Embodiment 1, the difference is that the air inlet duct 2 selects the air inlet branch pipe, and the number of atomizing and humidifying nozzles 1 is three groups.

[0034] Such as image 3 As shown, the positions of the three groups of atomizing and humidifying nozzles 1 are respectively at the air inlet branch pipe at the rail head 4, the air inlet branch pipe at the rail waist 6, and the air inlet branch pipe at the rail bottom 7.

[0035] Such as Figure 4 As shown in the figure, atomizing and humidifying nozzle 1 is a single-medium centrifugal atomizing nozzle, which is concentrated at one point to form a group, and is connected and sealed with the air inlet branch pipe through bolts and flanges. The air inlet branch pipe is connected and sealed.

[0036] The atomized water mist is sprayed into the three air inlet branch pipes from the atomization humidification nozzle 1 through the pipeline, and a...

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Abstract

The invention relates to the field of metal heat treatment, and provides a premixed spray quenching system for steel rail, aiming at online waste heat quenching and offline full-length quenching treatment of steel rail. The system is the improvement on wind spray quenching equipment, and has the following characteristics: several groups of atomizing and humidifying nozzles are arranged on an air inlet pipe of the wind spray quenching equipment; the atomizing and humidifying nozzles are connected to the air inlet pipe through a bolt and a flange and are sealed; atomized mist is sprayed into the air inlet pipe by the atomizing and humidifying nozzles, and mixed with the compressed air in the air inlet pipe; and the compressed air containing mist is sprayed onto the steel rail by an wind spray nozzle of the air inlet pipeline. The premixed spray quenching system for steel rail has advantages of wind spray quenching and mist spray quenching of steel rail and overcomes their disadvantages, and can ensure the quenching quality of steel rail; besides, the system has low noise, low energy consumption and low processing cost, and can be used for off-line quenching of steel rail, especially for online slack quenching of steel rail.

Description

technical field [0001] The invention relates to the field of metal heat treatment, and aims at on-line waste heat quenching and off-line full-length quenching of rails, and is a spray cooling and quenching system for premixed rails. Background technique [0002] The use of heat-treated rails on railways has a service life of 1 to 3 times that of ordinary hot rails, which is especially important for the construction of high-speed and heavy-duty railways. At present, according to the medium used for heat treatment of rails, it is mainly divided into two processes: "jet cooling" and "spray cooling". The former is to spray 0.1~0.5Mpa compressed air to the head of the rail during quenching; the latter is The atomized air-water mixture is sprayed to the rail head through the air-water atomization nozzle. The advantage of "spray cooling" quenching is that the cooling speed can be adjusted in a large range (1~15°C / s), and the operating cost is low. However, during work, the nozzle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/667C21D9/04E01B31/18
Inventor 刘赵卫管序荣雷华王受田冯业文
Owner CHINA NAT HEAVY MACHINERY RES INSTCO
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