CN104561499B

CN104561499B - Steel tube quenching device

Info

Publication number: CN104561499B
Application number: CN201510034102.XA
Authority: CN
Inventors: 张海; 李新; 李永强; 张小东; 郑果; 王楠楠; 孔新玲
Original assignee: Henan University of Technology
Current assignee: Henan University of Technology
Priority date: 2015-01-23
Filing date: 2015-01-23
Publication date: 2017-01-18
Anticipated expiration: 2035-01-23
Also published as: CN104561499A

Abstract

The invention relates to a steel tube quenching device which comprises a cone-shaped flexible outer barrel, a cone-shaped expandable inner barrel and a high pressure water supply pipeline, wherein the cone-shaped flexible outer barrel is a cone-shaped barrel which is small at the upper end and big at the lower end; the cone-shaped expandable inner barrel is a cone-shaped barrel which is big at the upper end and small at the lower end; the cone-shaped expandable inner barrel is fixedly arranged in the cone-shaped flexible outer barrel; the outer side face of the cone-shaped expandable inner barrel and the inner side face of the cone-shaped flexible outer barrel form a cavity which is opened at the upper end; the cavity is internally provided with a steel tube bearing bracket; and the high pressure water supply pipeline is communicated with the bottom of the cavity.

Description

A kind of steel tube quenching device

Technical field

The present invention relates to a kind of steel tube quenching device.

Background technology

The quenching of hydraulic cylinder steel pipe at present mainly uses traditional quenching tank quenching mode.Under this quenching mode, high temperature The steam film producing between steel pipe inside and outside wall and hardening media cannot quickly eliminate so that the quenching cooling velocity of steel pipe is by very big Impact, and there is larger difference in the cooling velocity at steel pipe different parts, quenching difficult quality is protected.In order to improve quenching Effect, occurs in that several steel pipe quenching mode, such as leaching quenching, fountain quenching, quenching ring quenching etc..Particularly known Bottom-spraying quenching device (cn201020248619.1) can significantly improve steel pipe quenching effect, improves steel pipe quenching quality. But this device is when quenching to steel pipe, the cooling velocity between steel pipe cooling velocity in the axial direction and inside and outside wall all exists relatively Big difference, constrains the raising further of quenching quality.

Content of the invention

The defect existing for prior art, the invention provides a kind of steel tube quenching device, can greatly improve steel pipe Quenching quality.

Concrete technical scheme is: a kind of steel tube quenching device, shrinks outer tube, conical expansion inner core and high pressure including taper and supplies Water lines, it is big top and small bottom taper type cylinder that outer tube is shunk in taper, and conical expansion inner core is small top and big bottom cone Platform shape cylinder, conical expansion inner core is fixedly installed on taper and shrinks in outer tube, and conical expansion inner core lateral surface and taper are shunk outer Cylinder medial surface constitutes the cavity of upper end open, is provided with steel pipe bearing support in cavity, and high service pipeline is with cavity bottom even Logical.

Described steel pipe bearing support is made up of support bar, wedge and column, and support bar is along the radial direction of conical expansion inner core Setting, wedge and column are vertically arranged on support bar, wedge near conical expansion inner core, wedge tip upward, and The inclined-plane of wedge is located towards the side of column, and the distance between wedge lower end and column are less than the wall thickness of steel pipe.

Described steel pipe bearing support is uniformly distributed along conical expansion inner core circumference.

Described steel pipe bearing support quantity is more than or equal to 3.

In same level, the distance that the tube wall of described steel pipe shrinks outer tube to taper is more than it to conical expansion inner core Distance.

It is provided with, on described high service pipeline, the supply-water pump being driven by variable-frequency motor.

Described conical expansion inner core and taper are shunk outer tube and are coaxially disposed.

Described taper is shunk and is provided with spillway basin below outer tube.

It is provided with discharge pipe line in described spillway basin, discharge pipe line is provided with suction pump.

Present configuration is simple, easy to use, and cooling water enters taper through high service pipeline and shrinks outer tube and taper After in cavity between extension inner core, both there is higher axial flow velocity, had higher ring flow velocity again, be greatly improved and quench The turbulence intensity of fiery medium, accelerates the failure and disperses the steam film in steel pipe walls, improves quenching cooling velocity；Taper shrink outer tube and The cross-sectional area of the cavity between conical expansion inner core is gradually reduced from the bottom to top, make the flow section of the inside and outside wall of steel pipe by Decrescence little, hardening media flow velocity is gradually increased, and the upper and lower of steel pipe can be made to obtain basically identical cooling velocity, raising is quenched Fiery quality；Because wedge is near conical expansion inner core, make in same level after steel pipe is fixing between wedge and column Steel pipe walls in face are closer to conical expansion inner core, so that the inwall of steel pipe obtains basically identical cooling velocity with outer wall, Improve quenching quality；Electrodeless regulation can be carried out by adjusting the rotating speed of variable-frequency motor to the flow of supply-water pump, thus can be according to quenching Ignition technique parameter request carries out precise control to quenching cooling velocity, improves quenching quality further.

Brief description

Fig. 1 is present configuration schematic diagram；

Fig. 2 is steel pipe bearing support structural representation of the present invention；

Fig. 3 is Fig. 2 top view.

Specific embodiment

As shown in Figure 1, Figure 2 and Figure 3, a kind of steel tube quenching device, shrinks outer tube 1, conical expansion inner core 2 and including taper High service pipeline 3, it is big top and small bottom taper type cylinder that outer tube 1 is shunk in taper, conical expansion inner core 2 be upper end big under Hold little taper type cylinder, conical expansion inner core 2 is fixedly installed on taper and shrinks in outer tube 1, and conical expansion inner core 2 and taper are received Contracting outer tube 1 is coaxially disposed.Conical expansion inner core 2 lateral surface shrinks, with taper, the cavity 4 that outer tube 1 medial surface constitutes upper end open, Cavity 4 cross-sectional area is gradually reduced from the bottom to top, and high service pipeline 3 is connected with cavity 4 bottom, is provided with 4 in cavity 4 Steel pipe bearing support 5, steel pipe bearing support 5 is uniformly distributed along conical expansion inner core 2 circumference.Steel pipe bearing support 5 is by support bar 6th, wedge 7 and column 8 form, and support bar 6 is radially arranged along conical expansion inner core 2, and wedge 7 and column 8 are vertically arranged On support bar 6, wedge 7 near conical expansion inner core 2, the tip of wedge 7 upward, and the inclined-plane of wedge 7 be located at court To column 8 side.

The steel pipe 14 carrying out Quenching Treatment will be needed to be sheathed on conical expansion inner core 2, the lower end tube wall of steel pipe 14 is located at Between wedge 7 and column 8, because the distance between wedge 7 lower end and column 8 are slightly less than the wall thickness of steel pipe 14, steel pipe 14 Fixed under the collective effect power of wedge 7 and column 8, simultaneously because wedge 7 and column 8 is vertically arranged it is ensured that steel Pipe 14 is also vertical state, high service pipeline 3 is provided with the supply-water pump 10 being driven by variable-frequency motor 9, according to actual work Skill requires, and controls the flow of supply-water pump 10 by adjusting variable-frequency motor 9, thus controlling going out of cooling water in high service pipeline 3 It is achieved that precise control to quenching cooling velocity, cooling water enters has higher ring and axial speed to the water yield in cavity 4 Degree, is quickly cooled down to the inside and outside wall of steel pipe 14 simultaneously, have just enter into the cooling water of cavity 4 bottom due to temperature relatively low, to steel The cooling effect of pipe 14 is preferable；Flow up with cooling water, temperature gradually rises, the cooling effect of steel pipe 14 is gradually subtracted Weak, but because cavity 4 cross-sectional area is gradually reduced from the bottom to top, cooling water flow velocity is gradually accelerated, and cools down adding of water flow velocity Be conducive to soon improving steel pipe 14 cooling velocity, can offset water temperature rise impact to cooling effect so that the top of steel pipe 14 and Bottom obtains essentially identical cooling velocity, because wedge 7 is near conical expansion inner core 2, when steel pipe 14 in wedge 7 and stands Between post 8 fixing after make steel pipe walls in same level closer to conical expansion inner core 2, so that inside and outside to steel pipe 14 The cooling velocity of wall is closer to or essentially identical.

Taper is shunk and is provided with spillway basin 11 below outer tube 1, is provided with discharge pipe line 12, on discharge pipe line 12 in spillway basin It is provided with suction pump 13, enter in spillway basin 11 from the cooling water that cavity 4 upper end is overflowed, using suction pump 13 by spillway basin 11 The higher cooling water of temperature is entered in the cooling bay of outside by discharge pipe line 12 and is cooled, and then reenters high pressure It is achieved that recycling of cooling water in supply channel 3, save resource.

Claims

1. a kind of steel tube quenching device it is characterised in that: include taper and shrink outer tube, conical expansion inner core and high service pipe Road, it is big top and small bottom taper type cylinder that outer tube is shunk in taper, and conical expansion inner core is small top and big bottom taper type Cylinder, conical expansion inner core is fixedly installed on taper and shrinks in outer tube, and conical expansion inner core lateral surface is shunk in outer tube with taper Side constitutes the cavity of upper end open, is provided with steel pipe bearing support, high service pipeline is connected with cavity bottom in cavity；Institute State steel pipe bearing support to be made up of support bar, wedge and column, support bar is radially arranged along conical expansion inner core, wedge Be vertically arranged on support bar with column, wedge near conical expansion inner core, wedge tip upward, and the inclined-plane of wedge It is located towards the side of column, the distance between wedge lower end and column are less than the wall thickness of steel pipe.

2. as claimed in claim 1 a kind of steel tube quenching device it is characterised in that: described steel pipe bearing support is along conical expansion Inner core circumference is uniformly distributed.

3. as claimed in claim 1 a kind of steel tube quenching device it is characterised in that: described steel pipe bearing support quantity be more than etc. In 3.

4. as claimed in claim 1 a kind of steel tube quenching device it is characterised in that: in same level, described steel pipe The distance that tube wall shrinks outer tube to taper is more than it and arrives the distance of conical expansion inner core.

5. as claimed in claim 1 a kind of steel tube quenching device it is characterised in that: be provided with described high service pipeline by The supply-water pump that variable-frequency motor drives.

6. as claimed in claim 1 a kind of steel tube quenching device it is characterised in that: described conical expansion inner core and taper are shunk Outer tube is coaxially disposed.

7. as claimed in claim 1 a kind of steel tube quenching device it is characterised in that: described taper is shunk and is provided with below outer tube Spillway basin.

8. as claimed in claim 7 a kind of steel tube quenching device it is characterised in that: be provided with drainpipe in described spillway basin Road, discharge pipe line is provided with suction pump.