CN2214243Y

CN2214243Y - Hydraulic transmission casing roller

Info

Publication number: CN2214243Y
Application number: CN 94230793
Authority: CN
Inventors: 潘国祥
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-16
Filing date: 1994-11-16
Publication date: 1995-12-06
Anticipated expiration: 2004-11-16

Abstract

The utility model relates to a hydraulic transmission pipe expander, which mainly solves the problems of the pipe expander in the prior art of bad expanding pipe quality, inconvenient operation, unsafety, etc. Two expanding heads arranged on an expansion rod are composed of three valves which are connected into the integration through elastic rings. A positioning sleeve and a three-valve type stop sleeve are arranged behind the expanding heads. The three valves of the stop sleeve are also connected into the integration through two elastic rings. A travel switch is arranged on the front part of the stop sleeve, and the back part of the expansion rod is connected to the piston rod of a hydraulic cylinder. A sleeve barrel is arranged on the periphery of the hydraulic cylinder. The utility model can be widely used for the expansion joint of the pipe and the pipe plate of the exchanger of equipment such as a boiler furnace, a chemical machine, a refrigeration machine, etc.

Description

Hydraulic transmission casing roller

The utility model relates to a kind of device that the heat exchanger tube and the tube sheet of plant equipment are carried out expanded joint, particularly a kind of hydraulic drive electric tube expander.

What use was more in the prior art is mechanical expanding, but also has some problems, as: because the expand tube moment of torsion of every pipe is all different, the electronic controller effect of existing control expand tube moment of torsion is little, and operating personnel have only control by rule of thumb, swelling degree instability.Be prone to and expand (it is excessive to expand) and owe bloated (jail of expanding), and crossed and make the tube wall peeling when bloated, and also can cause tube brakes and tube plate deformation because of the tube wall excessive thinning.During expand tube, expander roll can not be coaxial with the pipe endoporus (when coaxial, expand head and pipe rotate and can't expand tube), thereby the tube wall thickness ununiformity after expanding is spared.The mechanical expanding device is heavier, two handles of the horizontal direction of will firmly holding with a firm grip during expand tube, otherwise tube expander can rotate hurts sb.'s feelings.The pipe residual stress was big after this method expanded.

The purpose of this utility model is to overcome the deficiency of prior art, and a kind of easy to use, expand tube quality height, low, safe and reliable, the well behaved hydraulic drive electric tube expander of labour intensity are provided.

The purpose of this utility model is achieved in that it includes expander roll and bloated head.Bloated 2 that is provided with on expander roll 1 is the bloated heads of two three-clove styles, and three lobes of each head that expands are connected as a single entity by elastic ring 10.Thereafter be provided with positioning sleeve 3, the back of positioning sleeve 3 is provided with three-clove style stop cover 4, and three lobes of stop cover also are connected as a single entity by two elastic rings.The front portion of stop cover 4 is provided with a travel switch 9.The piston rod of the rear portion of expander roll 1 and hydraulic cylinder 6 links together.The outer periphery of hydraulic cylinder 6 is equipped with a sleeve 5.

The utility model compared with prior art has more advantage.

1. the hydraulic drive electric tube expander is to adopt the control method of measuring, and the internal diameter of pipe after the precision control of the diameter that expands after promptly dependence is pushed up is expanded can not produce and expand, owes defective bloated and that wall unevenness is even, and the swelling degree is stable, expanded joint quality height.

2. the head moving linearly rather than rotate in pore that expands, pipe can not produce torsional deflection.

3. operate light safety.

4. the back residual stress that expands is little, the pipe long service life.

Below in conjunction with accompanying drawing the utility model is further described.

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

Fig. 2 is 2 the structural representation of expanding among Fig. 1.

When Fig. 3 is needed flange by the end of expand tube, the structural representation of used stop cover 11.

Fig. 4 is a hydraulic circuit diagram of the present utility model.

In the above-mentioned accompanying drawing, 1 is expander roll; 2 are the head (2) that expands, and each head that expands is made up of three lobes, and the end has protruding and recessed dovetail groove, the trapezoidal complete cylindrical surface that is combined together to form of convex-concave of two heads that expand; 3 is positioning sleeve; 4 are the stop cover, also are made up of three lobes, and its three lobe makes it to become one with elastic ring; 5 is sleeve; 6 is hydraulic cylinder; 7 is pipe; 8 is tube sheet, and pipe 7 has inserted in the hole of tube sheet 8 before the expand tube; 9 is travel switch; 10 is elastic ring; 11 is the stop cover (front end face has the V-type groove) when being used for flange.

Above-mentioned structure shown in the drawings is exactly embodiment of the present utility model.In the utility model when work,, the piston rod of hydraulic cylinder 6 promotes to be contained in stop left and overlaps expander roll 14 holes in, makes bloated 2 less than pore diameter to enter pore.When arriving precalculated positions for bloated 2, positioning sleeve 3 shoulders touch and are contained in the travel switch 9 that 4 front portions are overlapped in stop, make the piston rod commutation drive expander roll 1 and move to right.When expander roll 1 moved to right, its tapering part backed down the variable 2(that expands of diameter and is made up of three lobes), and two bloated 2 of axial compression, they are combined.When two heads that expand were backed down and combine, stop cover 4 was backed down by two shaft shoulders of expander roll 1, and it is big that diameter of bore becomes, the thrust function of positioning sleeve 3 is disappeared, expander roll 1 drive expand 2, positioning sleeve 3 continues to move to right, finish expand tube and move to right to pore.If pipe needs flange, just stop cover 4 is changed into the stop cover 11 that front end face has the V-type groove.

Claims

1, a kind of hydraulic drive electric tube expander, include expander roll and bloated head, it is characterized in that: going up the bloated head (2) that is provided with at expander roll (1) is the bloated heads of two three-clove styles, three lobes of each head that expands are connected as a single entity by elastic ring (10), be provided with positioning sleeve (3) thereafter, the back of positioning sleeve (3) is provided with three-clove style stop cover (4), three lobes of stop cover also are connected as a single entity by two elastic rings, the front portion of stop cover (4) is provided with a travel switch (9), the piston rod of the rear portion of expander roll (1) and hydraulic cylinder (6) links together, and the outer periphery of hydraulic cylinder (6) is equipped with a sleeve (5).