CN2657870Y

CN2657870Y - Tube drawing apparatus

Info

Publication number: CN2657870Y
Application number: CN 03252322
Authority: CN
Inventors: 何维胜; 徐德钧
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-09-27
Filing date: 2003-09-27
Publication date: 2004-11-24
Anticipated expiration: 2013-09-27

Abstract

The utility model relates to a tube drawing apparatus used to change metal pipes of various heat exchangers. The utility model consists of a pull rod and an shape expansion body slipped-on the pull rod, the front end of the pull rod is a circular cone section, the small diameter part of the circular cone section is the transition to the middle section part of the pull rod, the shape expansion body is composed of arc-shaped casing of at least two equal part bodies divided into by a sleeve-shaped component in the axial direction, a teeth part is arranged on the outer periphery surface of the front end thereof, an opening-shaped spring snap ring is arranged inside the annular groove opened on the outer periphery surface of the back end. Adopting the utility model to disassembly pipe fittings, the manual labor intensity is small, the efficiency is high, and no damages can be done to the plate pipes fixing pipe fittings.

Description

Pipe extractor

Technical field

The utility model discloses a kind of repairing, dismounting utensil that is used to change metal tube on all kinds of heat exchangers.

Background technology

Usually adopt metal tube to use on the heat exchanger as cooling water pipe, this cooling water pipe needs to change after using a period of time, conventional method for dismounting is to utilize chisel to carry out manually dashing picking, not only labour intensity is big for this method, efficient is low, and when picking pipe, cutter easily tube sheet is caused damage, install once more when upgrading pipe, occur easily leaking.

Technology contents

Technical task to be solved in the utility model provides a kind of removal efficiency height, tube sheet is not had damage, easy to operate pipe extractor.

For achieving the above object, the utility model has adopted following technical scheme: a kind of pipe extractor, it is characterized in that: the utility model comprises a pull bar and the bulging body that is set on this pull bar, the front end of described pull bar is a conical section, the minor diameter position of conical section carries out the transition to the position, stage casing of pull bar, the bulging body is to be made of along the arcuation housing of axial length direction cutting at least two equal portions bodies the cannula-like member, the side face of its front end is provided with tooth portion, offer cannelure on the side face of rear portion, be provided with ringent jump ring in the cannelure, the interior forward end of bulging body is a round taper hole, and the diameter dimension of its largest hole oral area position is less than the size at the front end conical section maximum gauge position of aforesaid pull bar.

As shown from the above technical solution, the bulging body is as the term suggests be a member that is in the less state of size after the big and shape of contracting of size can bulging the time, the interior forward end of bulging body is that round taper hole cooperates the realization bulging with the front end conical section of pull bar, specifically be exactly to squeeze the effect of expanding when the bulging body continues to be subjected to it when conical section one end of pull bar front end moves, the leading portion of the arcuation housing of the equal portions body of formation bulging body integral body is with separated from one another, make the overall size of its side face become big, promptly be in the bulging state, when being subjected to it to squeeze the effect of expanding when the conical section away from the pull bar front end moves, reduces gradually the bulging body until there not being the effect of expanding of squeezing, under the jump ring effect in the cannelure of offering on the side face of rear portion, the arcuation housing that constitutes the halfbody of bulging body closes up member that is roughly the pipe box shape of formation each other.When utilizing the utility model dismounting pipe fitting, at first be to stretch into when the bulging body is in contraction state to wait to tear open in the tube head of pipe fitting, again the bulging by the bulging body with wait that the tube head of tearing pipe fitting open closely is fixed as one, making the drive of bulging body wait to tear open relative its fixed tube sheet of pipe fitting with actuating unit again is moved, thereby pipe fitting is unloaded from its fixing tube sheet, adopt the utility model dismounting pipe fitting, hand labor intensity is little, efficient is high, to the plate pipe not damaged of fixed fitting.

Summary of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of the single individuality of bulging body;

Fig. 3 is the left view of Fig. 2.

The specific embodiment

As shown in Figure 1, the utility model comprises a pull bar 10 and the bulging body 20 that is set on this pull bar 10, the front end of described pull bar 10 is a conical section 11, the minor diameter position of conical section 11 carries out the transition to 12 positions, stage casing of pull bar 10, bulging body 20 is to be made of for the arcuation shell of halved body at least along the cutting of axial length direction the cannula-like member, the outer peripheral face of its front end is provided with tooth portion 21, offer cannelure 22 on the outer peripheral face of rear portion, be provided with ringent jump ring 30 in the cannelure 22, the interior forward end of bulging body 20 is a round taper hole 23, and the diameter dimension of its largest hole oral area position is less than the size at the front end conical section 11 maximum gauge positions of aforesaid pull bar 10.When bulging body 20 is in the bulging state, can realize interference fit, implement to unload the pipe action with waiting to unload pipe fitting inner wall; Bulging body 20 is in when receiving the shape attitude, separates with pipe fitting inner wall to be unloaded, and can pass in and out pipe fitting to be unloaded easily.

As Fig. 2, shown in 3, described bulging body 20 is along the cutting of axial length direction three equal parts by the cannula-like member, be that three sections isometric fan segmental arcs and cutting face are by its shaft core line in other words with the even cutting of the annular cross section of a pipe fitting, the support power that when its bulging struts the inwall of pipe fitting to be removed is applied is comparatively even like this, there are 3～6 tooth portions in described tooth portion 21, mainly be that can to guarantee to dismantle the field of load of inwall of pipe fitting bigger, described cannelure 22 is provided with 2～3, be respectively equipped with ringent jump ring 30 in it, consuming in the time of can making bulging body 20 bulgings like this need not be excessive in the external force that overcomes jump ring 30 elastic force, and three halfbodies keep synchronous basically when the contraction of while bulging body 20 and bulging.Solid line among Fig. 2,3 partly is bulging body 20 3/part, cooperates the complete structure of expression bulging body 20 with the dotted line among the figure.

The front end of the conical section 11 of described pull bar 10 is yi word pattern, cross or hexagon termination 13, and pull bar 10 rear ends are thread segment 14, and the root of thread segment 14 is an annular table 15.The thread segment 14 of pull bar 10, be to be connected with hydraulic pressure or machine power mechanism for the ease of pull bar 10, annular table 15 is a process structure, be used for connecting the location, conical section 11 is yi word pattern, cross or hexagon termination 13, mainly is to make things convenient for pull bar 10 to be connected with hydraulic pressure or machine power mechanism or rotating tension bar 10 when dismantling.

The size of described pull bar 10 front end terminations is less than the tooth top diameter dimension of described tooth portion 21, this is after considering that front end when conical section 11 is provided with yi word pattern, cross or hexagon termination 13, the tooth portion 21 that should not influence bulging body 20 inserts and waits to tear open in the pipe fitting tube head, the middle part outer surface of bulging body 20 is provided with an annular table 24, the diameter of this annular table 24 is greater than the tooth top diameter dimension of described tooth portion 21, annular table 24 also is a technological design, mainly is positioning action.

Claims

1, a kind of pipe extractor, it is characterized in that: the utility model comprises a pull bar (10) and is set in bulging body (20) on this pull bar (10), the front end of described pull bar (10) is conical section (11), the minor diameter position of conical section (11) carries out the transition to the position, stage casing (12) of pull bar (10), bulging body (20) is to be made of along the arcuation shell of axial length direction cutting at least two equal portions the cannula-like member, the outer peripheral face of its front end is provided with tooth portion (21), offer cannelure (22) on the outer peripheral face of rear portion, be provided with ringent jump ring (30) in the cannelure (22), the interior forward end of bulging body (20) is round taper hole (23).

2, pipe extractor according to claim 1, it is characterized in that: the interior forward end of described bulging body (20) is round taper hole (23), the diameter dimension of its largest hole oral area position is less than the size at front end conical section (11) the maximum gauge position of aforesaid pull bar (10), described bulging body (20) is along the cutting of axial length direction three equal parts by the cannula-like member, there are 3～6 tooth portions in described tooth portion (21), described cannelure (22) is provided with 2～3, is respectively equipped with ringent jump ring (30) in it.

3, pipe extractor according to claim 1, it is characterized in that: the termination of the front end conical section (11) of described pull bar (10) is yi word pattern, cross or hexagon termination (13), pull bar (10) rear end is thread segment (14), and the root of thread segment (14) has annular table (15).

4, according to claim 2 or 3 described pipe extractors, it is characterized in that: the size of described pull bar (10) front end termination is less than the tooth top diameter dimension of described tooth portion (21), the middle part outer surface of bulging body (20) is provided with an annular table (24), and the diameter of this annular table (24) is greater than the tooth top diameter dimension of described tooth portion (21).