CN200970617Y

CN200970617Y - Hydraulic pipe expander

Info

Publication number: CN200970617Y
Application number: CN 200620125269
Authority: CN
Inventors: 赵通生
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-13
Filing date: 2006-11-13
Publication date: 2007-11-07
Anticipated expiration: 2016-11-13

Abstract

This hydraulic tube expander includes shell, handle, cone-shaped rod which is connected with handle and expander head which can expand along radial direction; the front end of cone-shaped rod is provided with cone-shaped expanding part, the expander head is provided with tapered hole, the shell is provided with oil pool and cylinder sleeve, part of the cone-shaped rod crosses cylinder sleeve and has friction with cylinder sleeve, the shell is provided with oil inlet channel, oil outlet channel and pressure-generating device which makes hydraulic oil generate pressure, and the hydraulic oil with pressure pushes cone-shaped rod and insert in the tapered hole on the expander head. Comparing with traditional structure, this utility model is provided with compact structure, light weight, low labor intensity and simple operation, which is suitable for processing of joint copper tube in air conditioning equipment; moreover, the self-lubrication system is adopted, the cone-shaped rod and cylinder sleeve can be protected better, and the service life of this utility model is also extended.

Description

The hydraulic pressure pipe-expander

Technical field

The utility model relates to a kind of small-sized hand-operated instrument, especially for the pipe-expander of processing air-conditioning junction block.

Background technology

In the prior art, the air-conditioning junction block is processed by hand pipe-expander usually.Handly administer awl bar that device generally includes housing, handle, is in transmission connection mutually with handle, be fixedly connected on the head that rises on the housing and that can radially expand, the leading section of described awl bar has enlarged portion, the described rearward end that rises by head has the bellmouth that can accommodate described enlarged portion, and handle drives the awl bar by leverage and moves forward and backward; When rising by the hole, depress conehead behind the handle and be inserted in the bellmouth on the head that rises, enlarge thereby make the external diameter of the head that rises enlarge the inner diameter of workpiece that will be set on the head that rises.Because traditional pipe-expander adopts the lever hand cranking structure, its arm of force is long, heavy and be difficult for carrying, utilizes manual strength to realize rising pipe in addition, and its inefficiency, labour intensity are greatly, machine is shorter service life.

Summary of the invention

The purpose of this utility model provides a kind of rapid operation, hydraulic pressure pipe-expander that working (machining) efficiency is high.

The technical scheme that the utility model adopted is: a kind of hydraulic pressure pipe-expander, comprise housing, be arranged on the awl bar in the described housing movably, be fixedly connected on the leading section of described housing and the head that rises that can radially expand, the leading section of described awl bar has tapered enlarged portion, the described rearward end that rises by head has the bellmouth that can accommodate described enlarged portion, has oil sump in the described housing, the outside of the part of described awl bar is arranged with cylinder sleeve, and has rubbing surface on the described awl bar, described rubbing surface is in the end of described cylinder sleeve and described cylinder sleeve CONTACT WITH FRICTION mutually, offer oil inlet passage that described oil sump is communicated with the inner chamber of described cylinder sleeve and the oil drain canal that described oil inlet passage is communicated with described oil sump in the described housing, be provided with the pressure generating mechanism that makes hydraulic oil produce pressure in the described oil inlet passage, the intersection of described oil drain canal and described oil inlet passage is provided with fuel outlet valve.

Also offer lubrication channel on the described housing, an end of described lubrication channel is connected with described oil sump, and the other end of described lubrication channel leads to described rubbing surface.

The oiler of described lubrication channel is connected with described oil drain canal, and described lubrication channel is connected with described oil sump by this oil drain canal.

Described lubrication channel comprises the lubrication hole of the front portion that is arranged on described cylinder sleeve, and the extended line of the axial line of described lubrication hole is along the radially extension of described awl bar, and described lubrication hole penetrates the wall portion of cylinder sleeve.

Described pressure generating mechanism comprises shoe cream room, be arranged between the oiler of described shoe cream room and the described oil sump can unidirectional conducting the oil-in of inlet valve, the oil-out that is arranged on described shoe cream room and described cylinder sleeve between can unidirectional conducting pressure valve, be arranged on push rod on the described housing movably, described push rod partly is positioned at described shoe cream room.

Described inlet valve comprises first valve ball that is arranged on the oiler place that is positioned at this shoe cream room in the described shoe cream room, pushes against first spring on the outer surface of described first valve ball.

Described pressure valve comprise be positioned at described shoe cream room outer and near second valve ball at the oil-out place of described shoe cream room, push against second spring on the outer surface of described the 3rd valve ball.

Also be provided with returning spring between described awl bar and the described cylinder sleeve.

The utility model compresses hydraulic oil by pressure generating mechanism, hydraulic oil is sprayed at a high speed from oil inlet passage, and the awl bar in the promotion cylinder sleeve moves forward, thereby finish the pipe action of rising, compare with traditional structure have compact conformation, in light weight, labour intensity is low, labour-saving simple to operate advantage, is specially adapted to the processing of the joint copper pipe of 10～38mm specification in the air-conditioning; In addition, owing to adopted self lubricating system, but therefore better protection is bored bar and cylinder sleeve, increases service life of the present utility model.

Description of drawings

Accompanying drawing 1 is a main cutaway view of the present utility model;

Accompanying drawing 2 is a vertical view of the present utility model;

Wherein: 1, housing; 2, cylinder sleeve; 3, second valve ball; 4, second spring; 5, returning spring; 6, oil inlet passage; 7, lubrication hole; 8, lubrication channel; 9, oil drain canal; 10, awl bar; 11, bellmouth; 12, workpiece; 13, the head that rises; 14, oil sump; 15, first valve ball; 16, first spring; 17, shoe cream room; 19, push rod; 20, handle; 21, rubbing surface; 22, inlet valve; 23, pressure valve; 24, fuel outlet valve; 25, enlarged portion; 26, pressure generating mechanism; 27, regulate bolt;

The specific embodiment

Referring to accompanying drawing 1 to accompanying drawing 2, a kind of hydraulic pressure pipe-expander, comprise housing 1, rotationally be arranged on handle 20 on the housing 1, be arranged in the housing 1 and awl bar 10, a leading section that is fixedly connected on housing 1 that is in transmission connection mutually with handle 20 and 13 (right side is " preceding " in the accompanying drawing 1, and the left side is " back ") of rising that can radially expand movably.Workpiece 12 to be processed is enclosed within and rises on 13, the leading section of described awl bar 10 has tapered enlarged

portion

25,13 the rearward end of rising has the bellmouth 11 that can accommodate enlarged portion 25, when this push rod 10 travels forward and be inserted in 13 the vertebral foramen 11 of rising, rising 13 just can be radially expanded, make be set on rise 13 on the internal diameter of workpiece 12 enlarge.

The outside that is set with oil sump 14, awl bar 10 on the housing 1 is arranged with cylinder sleeve 2, and has rubbing surface 21 on the described awl bar 10, described rubbing surface 21 is in the end of described cylinder sleeve 2 and described cylinder sleeve 2 CONTACT WITH FRICTION mutually, offer oil inlet passage 6 that oil sump 14 is communicated with cylinder sleeve 2 and the oil drain canal 9 that oil inlet passage 6 is communicated with oil sump 14 on the housing 1, be provided with the pressure generating mechanism 26 that makes hydraulic oil produce pressure in the oil inlet passage 6.

Also offer lubrication channel 8 on the housing 1, the oiler of described lubrication channel 8 is connected with described oil drain canal 9, and an end of lubrication channel 8 is connected with oil sump 14, and the other end of lubrication channel 8 leads to rubbing surface 21.Lubrication channel 8 comprises the lubrication hole 7 of the front portion that is arranged on cylinder sleeve 2, the extended line of the axial line of lubrication hole 7 is along the radially extension of awl bar 10, described lubrication hole 7 penetrates the wall portion of cylinder sleeve 2, hydraulic oil in the oil drain canal 6 can be flow on the rubbing surface 21 through lubrication hole 7, cylinder sleeve 2 and awl bar 10 are lubricated, therefore can prolong the service life of hydraulic pressure pipe-expander.Also be provided with on the housing 1 and regulate bolt 27, an end of this adjusting bolt 27 stretches into the infall of lubrication channel 8 and oil drain canal 9, screws in or screw out the oil mass that can regulate the hydraulic oil that enters lubrication channel 8 with regulating bolt 27.

Described pressure generating mechanism 26 comprises shoe cream room 17, be arranged between the oiler of described shoe cream room 17 and the described oil sump 14 can unidirectional conducting the oil-in of inlet valve 22, the oil-out that is arranged on described shoe cream room 17 and described cylinder sleeve 2 between can unidirectional conducting pressure valve 23, be arranged on push rod 19 on the described housing 1 movably, described push rod 19 parts are positioned at described shoe cream room 17.Inlet valve 22 comprises first valve ball 15 that is arranged on the oiler place that is positioned at this shoe cream room 17 in the shoe cream room 17, pushes against first spring 16 on the outer surface of first valve ball 15.Pressure valve 23 comprise be positioned at shoe cream room 17 outer and near second valve ball 3 at the oil-out place of shoe cream rooms 17, push against second spring 4 on the outer surface of the 3rd valve ball 3.

When the hydraulic pressure pipe-expander is not worked, first spring 16 is in the former length of nature, there is the gap in first valve ball 15 with the oiler place of shoe cream room 17, hydraulic oil can be full of shoe cream room 17, depress handle 20, making its underpart promote push rod 19 travels forward and inserts in the shoe cream room 17, at this moment, first spring 16 is compressed and forces first valve ball 15 that the oiler place of shoe cream room 17 is blocked, push rod 19 continues to enter makes the rapid minimizing of volume of the hydraulic oil in the shoe cream room 17 in the shoe cream room 17, and the active force that forces hydraulic oil to overcome second spring 4 is pushed second valve ball 3 at the oil-out place that is against shoe cream room 17 open and is flowed downward fast, and enter in the inner chamber of cylinder sleeve 2 by the slit between cylinder sleeve 2 and the housing 1, and promote awl bar 10 and travel forward and insert in the vertebral foramen 11, rise and 13 just can be radially expanded, make be set on rise 13 on the internal diameter of workpiece 12 enlarge, thereby finish the pipe action of rising.

Oil drain canal 9 intersects with the oil inlet passage 6 in the downstream of pressure valve 23, and is provided with fuel outlet valve 24 in the intersection, and this fuel outlet valve 24 is in closure state when rising by pipe, and oil drain canal 9 and oil inlet passage 6 are spaced from each other; Rise behind the pipe, open this fuel outlet valve 24, hydraulic oil in housing 1 inner chamber flows in the oil drain canal 9 by the downstream part of oil inlet passage 6, and awl bar 10 is got back to initial position backward under the effect of the spring force of returning spring 5, and then the hydraulic oil in cylinder sleeve 2 inner chambers is pressed in the oil drain canal 9.

Claims

1, a kind of hydraulic pressure pipe-expander, comprise housing (1), be arranged on the awl bar (10) in the described housing (1) movably, the head (13) that rises that is fixedly connected on the leading section of described housing (1) and can radially expands, the leading section of described awl bar (10) has tapered enlarged portion (25), the described rearward end that rises by head (13) has the bellmouth (11) that can accommodate described enlarged portion (25), it is characterized in that: have oil sump (14) in the described housing (1), the outside of the part of described awl bar (10) is arranged with cylinder sleeve (2), and has rubbing surface (21) on the described awl bar (10), described rubbing surface (21) is in the end of described cylinder sleeve (2) and described cylinder sleeve (2) CONTACT WITH FRICTION mutually, offer oil inlet passage (6) that described oil sump (14) is communicated with the inner chamber of described cylinder sleeve (2) and the oil drain canal (9) that described oil inlet passage (6) is communicated with described oil sump (14) in the described housing (1), be provided with the pressure generating mechanism (26) that makes hydraulic oil produce pressure in the described oil inlet passage (6), described oil drain canal (9) is provided with fuel outlet valve (24) with the intersection of described oil inlet passage (6).

2, hydraulic pressure pipe-expander according to claim 1, it is characterized in that: also offer lubrication channel (8) on the described housing (1), one end of described lubrication channel (8) is connected with described oil sump (14), and the other end of described lubrication channel (8) leads to described rubbing surface (21).

3, hydraulic pressure pipe-expander according to claim 2 is characterized in that: the oiler of described lubrication channel (8) is connected with described oil drain canal (9), and described lubrication channel (8) is connected with described oil sump (14) by this oil drain canal (9).

4, hydraulic pressure pipe-expander according to claim 2, it is characterized in that: described lubrication channel (8) comprises the lubrication hole (7) of the front portion that is arranged on described cylinder sleeve (2), the extended line of the axial line of described lubrication hole (7) is along the radially extension of described awl bar (10), and described lubrication hole (7) penetrates the wall portion of cylinder sleeve (2).

5, hydraulic pressure pipe-expander according to claim 1, it is characterized in that: described pressure generating mechanism (26) comprises shoe cream room (17), be arranged between the oiler of described shoe cream room (17) and the described oil sump (14) can unidirectional conducting the oil-in of inlet valve (22), the oil-out that is arranged on described shoe cream room (17) and described cylinder sleeve (2) between can unidirectional conducting pressure valve (23), be arranged on push rod (19) on the described housing (1) movably, described push rod (19) part is positioned at described shoe cream room (17).

6, hydraulic pressure pipe-expander according to claim 5 is characterized in that: described inlet valve (22) comprises first valve ball (15) that is arranged on the oiler place that is positioned at this shoe cream room (17) in the described shoe cream room (17), pushes against first spring (16) on the outer surface of described first valve ball (15).

7, hydraulic pressure pipe-expander according to claim 5 is characterized in that: described pressure valve (23) comprise be positioned at described shoe cream room (17) outer and near second valve ball (3) at the oil-out place of described shoe cream room (17), push against second spring (4) on the outer surface of described the 3rd valve ball (3).

8, hydraulic pressure pipe-expander according to claim 1 is characterized in that: also be provided with returning spring (5) between described awl bar (10) and the described cylinder sleeve (2).