CN202066342U

CN202066342U - Connecting joint of roller hearth furnace

Info

Publication number: CN202066342U
Application number: CN201120151199XU
Authority: CN
Inventors: 梁刚; 张学士; 黄绍辉; 赖煌; 许剑挺
Original assignee: Ningbo Jintian Copper Tube Co Ltd
Current assignee: Ningbo Jintian Copper Tube Co Ltd
Priority date: 2011-05-10
Filing date: 2011-05-10
Publication date: 2011-12-07
Anticipated expiration: 2021-05-10

Abstract

A connecting joint of a roller hearth furnace comprises a nut sleeve and a joint core; a central through hole is formed in the middle of the joint core; external threads are manufactured at the front end part and the rear end part of the joint core; the center of the nut sleeve is a through hole; and internal threads are manufactured inside an enlarging hole at the front end of the nut sleeve. The connecting joint is characterized in that an internal conical surface is manufactured in a shrink hole at the rear end of the nut sleeve; and correspondingly, a matched external conical surface is manufactured at the rear end of the joint core. The joint is made of ductile cast iron so as to keep good weldability and machinability and high plasticity so that the joint can bear vibration, torsion and the like under high-impact; combined with a reasonable and practical structure, the connecting joint obtains the advantages of good sealing property, high temperature resistance, easy detaching, no deformation, etc.

Description

The jointing of stove at the bottom of a kind of roller

Technical field

The utility model relates to a kind of piecing devices that are used for the blow device of stove at the bottom of the roller.

Background technology

Traditional annealing operation operating procedure has:

1, behind the material loading, the silk head on the coupling nut on the coil pipe and the scavenging conduit must be connected tight, and the copper pipe enlarging is necessary complete, guarantees air tightly, and copper pipe must not be killed folding.

2, the operative employee must check the gas leakage situation in the process that the stokehold purges, and finds leak gas to advance furnace annealing; Must leave enough tube head length in the after-combustion process, connect sweeping head in the stove material loading process to make things convenient at the bottom of the roller.

3, after material loading is finished,, bin is moved laterally to stove gate from width of cloth line by the inlet travelling platform by " automatically " or " manually " button of guidance panel.

When 4, bin is come out of the stove,, bin is transported to tears the spiral shell position open and tear spiral shell open by " automatically " or " manually " button of guidance panel.

Copper pipe before the annealing is inner must be protected by first inflated with nitrogen, for this reason behind the copper pipe material loading, silk head on coupling nut on the coil pipe and the scavenging conduit must be connected tight, because the jointing in traditional blow device is to adopt internal taper hole to connect, and tighten with screw location, its material is a common stainless steel, so the jointing sealing is not high, at high temperature yielding, nut is not quick detachable; And in purge,, to improve copper pipe pressure testing threaded coupler nut because of the not high phenomenon that leaks air that comes off that causes copper pipe of degree of tightening of screw for this reason.

Summary of the invention

Technical problem to be solved in the utility model provides the jointing of stove at the bottom of a kind of practicality rational in infrastructure, good airproof performance, the easily detachable roller.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: the jointing of stove at the bottom of a kind of roller, it includes nut sleeve and joint core, joint core center is shaped on central through hole, the leading section of joint core, rearward end manufacturing have external screw thread, the nut sleeve center is a through hole, and inner manufacturing of nut sleeve front end expanded hole internal thread is arranged, and it is characterized in that making in the rear end shrinkage cavity of described nut sleeve has inner conical surface, accordingly, the male cone (strobilus masculinus) that cooperation is arranged is made in joint core rear end.

As improvement, described nut sleeve is provided with the expanding reach of enlarged-diameter at the inboard position of inner conical surface.

As improvement, regular hexagon is arranged in cross section, described joint core middle part.

At last, the pipe joint material that is connected of scavenging conduit is a spheroidal graphite cast-iron.

Compared with prior art, advantage of the present utility model is: the joint material adopts spheroidal graphite cast-iron, have good weldability and machinability, plasticity height, can bear and vibrate under the HI high impact and reverse etc., in conjunction with reasonable and practical structure, good airproof performance, advantage such as high temperature resistant, quick detachable, indeformable have been obtained.

Description of drawings

Fig. 1 is the structure chart of the utility model nut sleeve;

Fig. 2 is the structure chart of the utility model joint core;

Fig. 3 is traditional structure chart.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Anticipate as shown in the figure, the jointing of stove at the bottom of a kind of roller, it includes nut sleeve 1 and joint core 2, its center tap core 2 centers are shaped on central through hole 2.1, this central through hole 2.1 is to be used for nitrogen to fill, the leading section manufacturing of joint core 2 has external screw thread 2.2, regular hexagon 2.3 is arranged in cross section, joint core 2 middle part, the rearward end manufacturing of joint core 2 has external screw thread 2.4, and joint core 2 rear ends also manufacture male cone (strobilus masculinus) 2.5, and nut sleeve 1 center is a through hole, and inner manufacturing of nut sleeve 1 front end expanded hole internal thread 1.1 are arranged, manufacture inner conical surface 1.2 in the nut sleeve 1 rear end shrinkage cavity, nut sleeve 1 is provided with the expanding reach 1.3 of enlarged-diameter at the inboard position of inner conical surface.

In the time of use, joint core 2 front ends are provided with by being threaded on the grate be fixed on stove at the bottom of the roller, nut sleeve 1 is with copper pipe as scavenging conduit by the rear end shrinkage cavity, then, nut sleeve 1 front end is by being threaded on joint core 2 rear ends, by tightening of screw thread, inner conical surface 1.2 and male cone (strobilus masculinus) 2.5 are locked, copper pipe is fixed on the jointing of stove at the bottom of the roller.

Claims

1. the jointing of stove at the bottom of the roller, it includes nut sleeve and joint core, joint core center is shaped on central through hole, the leading section of joint core, rearward end manufacturing have external screw thread, the nut sleeve center is a through hole, and inner manufacturing of nut sleeve front end expanded hole internal thread is arranged, and it is characterized in that making in the rear end shrinkage cavity of described nut sleeve has inner conical surface, accordingly, the male cone (strobilus masculinus) that cooperation is arranged is made in joint core rear end.

2. the jointing of stove at the bottom of the roller according to claim 1 is characterized in that described nut sleeve is provided with the expanding reach of enlarged-diameter at the inboard position of inner conical surface.

3. the jointing of stove at the bottom of the roller according to claim 1 and 2 is characterized in that cross section, described joint core middle part is arranged to regular hexagon.