Ringlike quenching device and application method thereof

The technology of a quenching device and an application method is applied in the field of steel pipe quenching, which can solve the problems of large investment and low return rate, and achieve the effects of simple and quick adjustment of the nozzle angle, labor reduction, and easy installation.

Pending Publication Date: 2018-05-25
CHINA NAT HEAVY MACHINERY RES INSTCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an annular quenching device and its application method to overcome the probl

Method used

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  • Ringlike quenching device and application method thereof
  • Ringlike quenching device and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1:

[0027] The present invention provides figure 1 with figure 2 An annular quenching device shown includes a water spray ring 1, a frame 4 and a conveying roller table 3. The water spray ring 1 is vertically installed on the frame 4, and the conveying roller table 3 is placed perpendicular to the central axis of the water spray ring 1. The ground, and the conveying roller 3 is located below the central axis of the water spray ring 1.

[0028] The working process of the ring quenching device is as follows:

[0029] Multiple sets of water spray rings 1 are installed on the frame 4 along a straight line. The steel pipe is driven by the conveying roller 3 while rotating and passes through the water spray ring 1. The water sprayed by the water spray ring 1 is sprayed to the outer surface of the steel pipe in a tangential direction. Ensure the cooling rate of the steel pipe to ensure that the quenched martensite structure is obtained until the quenching is completed.

[...

Example Embodiment

[0032] Example 2:

[0033] On the basis of Example 1, such as figure 1 with figure 2 As shown, the water spray ring 1 includes a water supply pipe 11, which is an annular steel pipe. A number of branch pipes 10 connected to the annular steel pipe are installed evenly on both sides along the circumferential direction. The branch pipes 10 are vertically connected to a swing arm 9, which One end of the arm is driven by a power unit 12, and the other end is connected to a nozzle manifold 8, and several nozzles 7 are installed at the end of the nozzle manifold 8.

[0034] It should be noted that since the power plant 12 is a prior art, its specific structure is not considered as the protection point of the present invention, and will not be described in detail here.

[0035] The power device 12 in the water spray ring 1 drives the swing arm 9 to rotate a certain angle around the center line of the branch pipe 10, so that the water sprayed from the nozzle 7 is sprayed to the outer surfac...

Example Embodiment

[0037] Example 3:

[0038] On the basis of embodiment 1, a lifting guide device 5 for driving the lifting and lowering of the frame 4 is installed below the frame 4. It should be noted that the lifting guide device 5 is an existing structure. As a preference, this embodiment selects a hydraulic cylinder or an electric The push rod and the lifting guide device 5 drive the frame 4 to lift as a whole, so that the water spray ring, the hood and the frame can be lifted a certain distance to ensure that the water spray ring is consistent with the center of the steel pipe.

[0039] The annular quenching device also includes a hood 2 covering the water spray ring 1 to prevent the quenching water from splashing around. The frame 4 and the hood 2 jointly cover the water spray ring to prevent the quenching water from splashing around.

[0040] The lower surface of the frame 4 is perforated and a deflector 14 is welded to divert the quenching water. A water tank 6 is provided under the deflector...

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PUM

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Abstract

The invention provides a ringlike quenching device and an application method thereof. The ringlike quenching device comprises water spray rings, a hood, a conveying roller way, a rack, an ascending, descending and guiding device and a water tank. The water tank, the water spray rings and the hood are arranged on the rack. The water spray rings are hooded with the hood and the rack. The lower surface of the rack is connected with the ascending, descending and guiding device. The water tank is located below the rack. The multiple water spray rings are each under independent control, and the water yield of each water spray ring can be adjusted according to the process. By means of the ascending, descending and guiding device, the water spray rings, the hood and the rack can be integrally ascended or descended by a certain distance, and it is guaranteed that the water spray rings are consistent with centers of steel tubes in height. Nozzle devices in the water spray rings can be integrallyrotated by a certain angle, and it is guaranteed that water sprayed out of nozzles is sprayed to the outer surfaces of the steel tubes in the tangential direction; steam films generated on the surfaces are broken up in the quenching process of the steel tubes; the surface heat exchange conditions of the steel tubes are improved; the cooling speed of the steel tubes is increased; it is guaranteedthat a quenching martensitic structure is obtained; and quenching water is prevented from flowing back into a quenching furnace from the inner walls of the steel tubes.

Description

technical field [0001] The invention belongs to the technical field of steel pipe quenching, and in particular relates to an annular quenching device and an application method thereof. Background technique [0002] When quenching the steel pipe, the water on the surface of the steel pipe is heated and vaporized to form a layer of steam film to isolate the steel pipe from water. Since the steam film is a poor conductor of heat, the cooling speed of the steel pipe is reduced. The cooling rate of the steel pipe during quenching must exceed the critical cooling rate in order to obtain the required martensitic structure. Therefore, during the quenching process, it is necessary to continuously break up the steam film produced on the surface of the steel pipe during quenching, improve the heat transfer conditions on the surface of the steel pipe, increase the cooling speed of the steel pipe, and ensure that the quenched martensite structure is obtained. This puts forward higher re...

Claims

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Application Information

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IPC IPC(8): C21D9/08C21D1/667
CPCC21D1/667C21D9/085
Inventor 高璐杜学斌徐能惠李永辉邵国栋王建国
Owner CHINA NAT HEAVY MACHINERY RES INSTCO
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