CN201470786U

CN201470786U - Manual hydraulic pipe expansion device

Info

Publication number: CN201470786U
Application number: CN2009201852747U
Authority: CN
Inventors: 赵通生
Original assignee: Wujiang Dongli Tool Co Ltd
Current assignee: Wujiang Dongli Tool Co Ltd
Priority date: 2009-05-27
Filing date: 2009-05-27
Publication date: 2010-05-19
Anticipated expiration: 2019-05-27

Abstract

The utility model discloses a manual hydraulic pipe expansion device, which comprises a pump body, an oil storage tube and a piston sleeve, wherein the oil storage tube is fixed on the pump body and is positioned at an oil inlet opening, the piston sleeve is positioned at an oil outlet opening, a handle is fixed on the oil storage tube, an expansion head is connected on the piston sleeve, a piston is glidingly arranged in the piston sleeve, a conical top pin inserted into the expansion head is fixed on the piston, a pipeline for exchanging the oil between the oil inlet opening and the oil outlet opening is arranged in the pump body, a plunger piston used for pumping the oil from the oil inlet opening to the oil outlet opening is arranged on the pipeline, a rocking handle is hinged on the pump body, and the rocking handle is connected with the plunger piston. The axial lead of the conical top pin is vertical to the extension direction of the handle, and in addition, the sliding direction of the plunger piston is parallel to the axial lead direction of the conical top pin. The handle of the pipe expansion device has larger hydraulic force than that of the existing pipe expansion device, so the pipe expansion device can be used for large-caliber pipes, and saves labor when the pipe expansion device is used.

Description

The hand-hydraulic pipe-expander

Technical field

The utility model relates to a kind of pipe-expander, especially a kind of hand-hydraulic pipe-expander.

Background technology

The more hand-hydraulic pipe-expander of existing use can be the Chinese utility model patent " hand-hydraulic pipe-expander " of " CN2671753 " with reference to notification number.Existing hand-hydraulic pipe-expander, structure are comparatively simple compact, easy to carry, but tension is little, generally can be used for small-bore pipe, just very require great effort if be applied in the large-diameter pipe period of the day from 11 p.m. to 1 a.m.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of hand-hydraulic pipe-expander that mainly is applicable to the heavy caliber pipe, and is more laborsaving during use.

The technical scheme that the utility model adopted is: a kind of hand-hydraulic pipe-expander comprises the pump housing with fluid inlet and fluid outlet, is fixed on the oil drum that is positioned at the fluid inlet on the described pump housing and is positioned at the piston bush that fluid exports.Be fixed with handle on the described oil drum.Be connected with the head that rises on the described piston bush, sliding in the described piston bush is provided with piston, is fixed with the taper thimble that inserts the described head that rises on the described piston.Offer the pipeline that makes that fluid can exchange between fluid inlet and fluid outlet in the described pump housing, described pipeline is provided with and is used for the plunger of fluid from described fluid inlet pump to the fluid outlet, be hinged with rocking handle on the described pump housing, described rocking handle is connected with plunger.Said structure is identical with existing hand-hydraulic pipe-expander principle, and innovation part of the present utility model is: the axial line of taper thimble is vertical with the bearing of trend of described handle, and the glide direction of described plunger is parallel with the direction of axis line of taper thimble.

Because the employing of technique scheme, under the identical situation of whole pipe-expander length, the handle of this pipe-expander can be than long 1～2 times of existing pipe-expander handle, and then this pipe-expander can be applied to bigbore pipe, use is laborsaving.And this pipe-expander is the same with the hand-hydraulic pincers that we generally use now, makes things convenient for everybody to be accustomed to using; Because the glide direction of plunger is parallel with the direction of axis line of taper thimble, can act directly on the piston after the plunger compression fluid, reduce the pressure loss on the way, can increase hydraulic coupling compared to existing technology.

Description of drawings

Fig. 1 is that master of the present utility model looks complete section figure;

Fig. 2 is the cutaway view of A-A line among Fig. 1;

Wherein, 1, handle, 2, rocking handle, 3, oil drum, 4, plunger, 5, oil return valve, 6, steady pin, 7, the pump housing, 8, piston bush, 9, a fixed cover that rises, 10, the head that rises, 11, oil storage bag, 12, oil return pipe, 13, the oil-feed steel ball, 14, flowline, 15, fuel-displaced steel ball, 16, the plunger seal circle, 17, piston packing, 18, piston, 19, back-moving spring, 20, the taper thimble, 21, tensioning spring, 24, bellmouth, 25, slide the piece that rises, 26, the oil return spool, 27, leakproof seal circle, 28, set bolt.

The specific embodiment

Below in conjunction with accompanying drawing and concrete embodiment the utility model is described in further detail:

Referring to Fig. 1, hand-hydraulic pipe-expander shown in Figure 2, comprise the pump housing 7, be fixed on the oil drum 3 that is positioned at the fluid inlet on the described pump housing 7 and be positioned at the piston bush 8 that fluid exports with fluid inlet and fluid outlet.

Be fixed with handle 1 on the described oil drum 3.

Be connected with on the described piston bush 8 and rise 10, described rising 10 comprises the fixed cover 9 that rises, slides the piece 25 that rises, is used for making that sliding the piece 25 that rises keeps the not tensioning spring 21 of spreading state with the described fixed cover 9 that rises slides and is provided with, the described fixed cover 9 that rises takes the shape of the letter U, have end face and sidewall, its sidewall is threaded with piston bush 8, and sliding on the described end face is provided with six described pieces 25 that rise that slide.Slide in the described piston bush 8 and be provided with piston 18, the two prevents that by piston packing 17 fluid runs off.Be provided with between described piston 18 and the piston bush 8 and make piston 18 be the back-moving spring 19 of movement tendency left.Be fixed with on the described piston 18 and insert described 10 the taper thimble 20 of rising, when moving right to insert, slides when rising by piece 25 by taper thimble 20, force each to slide the purpose that the piece 25 that rises was separated from each other, reached the pipe that rises, when taper thimble 20 with slide the piece 25 that rises and be separated, under the restoring force effect of tensioning spring 21, sliding rises draws between the piece 25 mutually.

Offer the pipeline that makes that fluid can exchange between fluid inlet and fluid outlet in the described pump housing 7, described pipeline comprises makes fluid flow to the flowline 14 of piston bush 8 and make fluid return the oil return pipe 12 of oil drum 3 from piston bush 8 from oil drum 3.Have two place's stage portion on the described flowline 14, first step portion is near oil drum 3, and first step portion be that close oil drum 3 place's calibers are little, big away from oil drum 3 place's calibers, and the big caliber place of first step portion is provided with oil-feed steel ball 13; Second step portion is near piston bush 8, and second step portion be near piston bush 8 place's calibers greatly, little away from piston bush 8 place's calibers, the big caliber place of second step portion is provided with fuel-displaced steel ball 15.Between oil-feed steel ball 13 and fuel-displaced steel ball 15, also be provided with on the described flowline 14 and be used for the plunger 4 of fluid from described fluid inlet pump to the fluid outlet, specifically, thread seal is connected with set bolt 28 on the described pump housing 7, offer through hole along its axial line on the described set bolt 28, plunger 4 slides with this through hole and is provided with, also offer seal groove on the hole wall of this through hole, be provided with plunger seal circle 16 in the seal groove, sealing effectiveness herein is good.In this embodiment, the axial line of taper thimble 20 is vertical with the bearing of trend of described handle 1, and the glide direction of described plunger 4 is parallel with the direction of axis line of taper thimble 20.Be hinged with rocking handle 2 on the described pump housing 7, described rocking handle 2 is connected with plunger 4.Described oil return pipe 12 is provided with and is used to control the oil return pipe 12 logical oil return valves 5 that close.

The using method of this pipe-expander is:

When rising by pipe, oil return valve 5 cuts out oil return pipe 12.Open rocking handle 2, drive plunger 4, form vacuum in the flowline 14 toward moving left, oil-feed steel ball 13, oil storage steel ball 15 have the moving trend that rolls left, then first step portion is opened, and fluid moves in the flowline 14 in the oil storage bag 11 of oil drum 3, and second step portion is in closed state.The rocking handle 2 that closes drives plunger 4 toward moving right, and flowline 14 internal pressures increase, oil-feed steel ball 13, oil storage steel ball 15 have right trend of rolling, then second step portion is opened, and fluid flows in the piston bush 8 from flowline 14, and first step portion is in closed state.Open rocking handle 2 again, then first step portion open, second step portion sealing, fluid enters flowline 14 from oil storage bag 11; The rocking handle 2 that closes again, then first step portion closes, second step portion opens, and fluid enters piston bush 8 from flowline 14.Repeatedly several times after, piston bush 8 inner fluids increase, and impel piston 18 to promote taper thimbles 20 and move right, spreading slides the piece 25 that rises, and plays the pipe effect of rising.

After finishing using, stir oil return valve 5 oil return pipe 12 is opened, fluid flows into oil storage bags 11 from piston bush 8, is moved to the left at the restoring force active force lower piston 18 of back-moving spring 19, under the restoring force of tensioning spring 21, slides the piece 25 that rises and draws in automatically.

Claims

1. hand-hydraulic pipe-expander comprises the pump housing (7) with fluid inlet and fluid outlet, is fixed on the oil drum (3) that is positioned at the fluid inlet on the described pump housing (7) and is positioned at the piston bush (8) that fluid exports,

Be fixed with handle (1) on the described oil drum (3),

Be connected with the head (10) that rises on the described piston bush (8), sliding in the described piston bush (8) is provided with piston (18), is fixed with the taper thimble (20) that inserts the described head (10) that rises on the described piston (18),

Offer the pipeline that makes that fluid can exchange between fluid inlet and fluid outlet in the described pump housing (7), described pipeline is provided with and is used for the plunger (4) of fluid from described fluid inlet pump to the fluid outlet, be hinged with rocking handle (2) on the described pump housing (7), described rocking handle (2) is connected with plunger (4)

It is characterized in that: the axial line of taper thimble (20) is vertical with the bearing of trend of described handle (1), and the glide direction of described plunger (4) is parallel with the direction of axis line of taper thimble (20).