CN104879338A - Hydraulic oil channel tailgating telescopic device - Google Patents

Hydraulic oil channel tailgating telescopic device Download PDF

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Publication number
CN104879338A
CN104879338A CN201510263128.1A CN201510263128A CN104879338A CN 104879338 A CN104879338 A CN 104879338A CN 201510263128 A CN201510263128 A CN 201510263128A CN 104879338 A CN104879338 A CN 104879338A
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oil
oil duct
resorption
spool
cavity
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CN201510263128.1A
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Chinese (zh)
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CN104879338B (en
Inventor
冯广建
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冯广建
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21FWORKING OR PROCESSING OF METAL WIRE
    • B21F1/00Bending wire other than coiling; Straightening wire

Abstract

The invention discloses a hydraulic oil channel tailgating telescopic device. The hydraulic oil channel tailgating telescopic device comprises an oil path control valve, a telescopic valve and a hydraulic oil cylinder. A medium passes through the oil path control valve, the telescopic valve and the hydraulic oil cylinder in sequence. According to the telescopic valve, the oil path direction of the medium is controlled through the oil path control valve, and the action of the telescopic valve and the action of the hydraulic oil cylinder are controlled through an oil path A and an oil path B which are independent of each other. The oil path A and the oil path B are independent of each other and do not affect each other, the oil path structure is simplified, the structures of all the components are simple, the production difficulty is lowered, it is guaranteed that the action of the telescopic valve and the action of the hydraulic oil cylinder are conducted in order, and linkage is achieved. In addition, the telescopic device can be applied to other hydraulic power devices to achieve linkage, and the application range of the telescopic device is wide.

Description

A kind of hydraulic pressure oil duct piggybacking expansion device

Technical field

The present invention relates to the angle bender accessory in a kind of technical field of buildings, particularly a kind of hydraulic pressure oil duct piggybacking expansion device.

Background technique

Use various reinforcing bar and by the stirrup obtained after steel bar meter in a large number in modern construction engineering, and reinforcing bar normally stores transport with coil form, before use must first through straightening, scale severing, part also needs through process step such as bendings.

The patent of invention " a kind of linkage telescopic valve being applied to reinforcing bar shaper bending mechanism " (patent No. is 201310048541.7) of claimant's earlier application discloses a kind of flexible valve structure be applied on anglebender, this structure effectively can control the flexible of telescopic pin, it is made to form a graded with the action of bending oil cylinder, be convenient to bending operation, first stretch out as telescopic pin and bend again, after having bent, telescopic pin is first return, and bending oil cylinder drives rotating disk to reset again.But the complex structure of above-mentioned flexible valve, the oil circuit arranged in same valve body is many, and manufacture difficulty is large, and meanwhile, above-mentioned flexible valve in use each oil circuit easily produces and influences each other, and affects the flexible valve even action of bending mechanism.

Summary of the invention

For interactional technical problem easy between the complex structure existed in existing linkage telescopic valve, oil circuit, the object of this invention is to provide a kind of hydraulic pressure oil duct piggybacking expansion device, this expansion device adopts external oil passage control valve A oil circuit and B oil circuit to be separated, both simplify the structure of all parts, avoid influencing each other between A oil circuit and B oil circuit simultaneously.

The technical solution adopted in the present invention is:

A kind of hydraulic pressure oil duct piggybacking expansion device, comprise hydraulic jack, described hydraulic jack is provided with the A oil cylinder interface and B oil cylinder interface that lay respectively at piston both sides, and described expansion device comprises,

Oil passage control valve, be made up of control valve body and control spool, control spool is arranged in control valve body and also can moves left and right,

Flexible valve, is made up of flexible valve body and telescoping spool, and telescoping spool is scalable to be arranged in flexible valve body, and the inner chamber of flexible valve body is divided into epicoele and cavity of resorption by telescoping spool;

Described control valve body is provided with oil-feed oil duct, emptying oil duct and oil duct A, oil duct B, control spool is provided with plural connecting groove, oil-feed oil duct, emptying oil duct are communicated with oil duct A or oil duct B respectively by connecting groove, and oil-feed oil duct is communicated with from different oil ducts with emptying oil duct simultaneously;

Described epicoele and cavity of resorption are respectively arranged with two oil circuit interfaces, and two oil circuit interfaces of cavity of resorption connect A oil cylinder interface and oil duct A respectively, and two oil circuit interfaces of epicoele connect B oil cylinder interface and oil duct B respectively.

The working procedure of expansion device of the present invention is as follows: before use, first utilizes oil pipe and supply reservoir to couple together respectively oil-feed oil duct and emptying oil duct.Medium from supply reservoir out, successively through oil passage control valve, flexible valve and hydraulic jack.Medium carries out oil circuit selection through oil passage control valve.When medium walks A oil circuit, medium promotes telescoping spool through flexible valve and stretches out, and medium arrives hydraulic jack promotion piston and stretches out; When medium walks B oil circuit, medium promotes telescoping spool through flexible valve and returns, and medium arrives hydraulic jack promotion piston and returns.

As the further improvement of technique scheme, the part that described telescoping spool is positioned at cavity of resorption is provided with bulge loop, telescoping spool is in two oil circuit interfaces that bulge loop when returning state separates cavity of resorption makes it not be communicated with, and the medium entering cavity of resorption from oil duct A promotes telescoping spool and stretches out; Telescoping spool stretches out the reach of rear bulge loop, two oil circuit orifice of cavity of resorption.After the setting of bulge loop makes telescoping spool stretch out completely, hydraulic jack could obtain fuel feeding, carries out action, ensure that the secondary sequence of action.

Further, described control valve body is provided with oil duct C, oil duct C connects A oil cylinder interface, when oil duct A is connected with oil-feed oil duct, controls spool jams oil duct C; When oil duct A is connected with emptying oil duct, oil duct C connects emptying oil duct by connecting groove.The setting of oil duct C is used for the medium accumulated in exudate compressing cylinder, can not have an impact to A oil circuit and B oil circuit simultaneously.

Further, described flexible valve body is provided with emptying oil duct, when telescoping spool is in and returns state, A oil cylinder interface connects the emptying oil duct on flexible valve body by the oil circuit interface of cavity of resorption; Telescoping spool stretches out rear enclosed emptying oil duct.The effect of the emptying oil duct of flexible valve body is identical with oil duct C.

As the further improvement of technique scheme, between described A oil cylinder interface and the oil circuit interface of cavity of resorption, be provided with pressure switch.The force value lower limit that pressure switch is arranged through, just by pressure switch after medium forms certain pressure in flexible valve body or hydraulic jack, this arranges and ensures that telescoping spool carries out action prior to the piston of hydraulic jack further.

As the further improvement of technique scheme, described control valve body is provided with multiple emptying oil duct, is convenient to oil extraction.

The invention has the beneficial effects as follows:

Contrast prior art, expansion device of the present invention adopts the oil circuit trend of oil passage control valve control media, the action of flexible valve and hydraulic jack is controlled by separate A oil circuit and B oil circuit, A oil circuit and B oil circuit separate, be independent of each other, simplify oil channel structures, make the structure of all parts simple, reduce production difficulty, ensure that the action of flexible valve and hydraulic jack is carried out in order, realizes interlock simultaneously.In addition, expansion device of the present invention also can be applicable to other hydraulic power units realize interlock, applied widely.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.

Fig. 1 is the structural representation of the embodiment of the present invention one;

Fig. 2 be embodiment one in working order 1(oil cylinder piston stretch out) oil circuit move towards schematic diagram;

Fig. 3 be embodiment one in working order 2(oil cylinder piston return) oil circuit move towards schematic diagram;

Fig. 4 is the structural representation of the embodiment of the present invention two;

Fig. 5 be embodiment two in working order 1(oil cylinder piston stretch out) oil circuit move towards schematic diagram;

Fig. 6 be embodiment two in working order 2(oil cylinder piston return) oil circuit move towards schematic diagram;

Fig. 7 is the structural representation of the embodiment of the present invention three;

Fig. 8 be embodiment three in working order 1(oil cylinder piston stretch out) oil circuit move towards schematic diagram;

Fig. 9 be embodiment three in working order 2(oil cylinder piston return) oil circuit move towards schematic diagram.

Drawing reference numeral illustrates: 1, oil passage control valve; 2, flexible valve; 3, hydraulic jack; 11, spool is controlled; 21, telescoping spool; 22, cavity of resorption; 23, epicoele; 31, piston; 4, oil passage control valve; 5, flexible valve; 6, pressure switch; 41, spool is controlled; 51, telescoping spool; 52, cavity of resorption; 53, epicoele; 7, oil passage control valve; 8, flexible valve; 71, spool is controlled; 81, telescoping spool; 82, cavity of resorption; 83, epicoele; A, oil duct A; B, oil duct B; C, oil duct C; P, oil-feed oil duct; O, emptying oil duct; A ', A oil cylinder interface; B ', B oil cylinder interface.

Embodiment

The embodiment that the invention provides three kinds of different structures is described hydraulic pressure oil duct piggybacking expansion device, and in the examples below, expansion device is preferably applied in the hydraulic bending mechanism for bending reinforcing steel bar.

Embodiment one:

With reference to Fig. 1, the first embodiment provided by the invention, comprises oil passage control valve 1, flexible valve 2 and hydraulic jack 3.

Described oil passage control valve 1 is made up of control valve body and control spool 11, and control spool 11 is arranged in control valve body and also can moves left and right.Control valve body is provided with oil duct A, oil duct B and oil duct C, oil-feed oil duct P and multiple emptying oil duct O.Control spool 11 is provided with three connecting grooves.When controlling spool 11 and moving to right, oil duct A connects oil-feed oil duct P, and oil duct B connects emptying oil duct O, and oil duct C blocks, as shown in Figure 2; When controlling spool 11 and moving to left, oil duct B connects oil-feed oil duct P, and oil duct A is connected emptying oil duct O with oil duct C, as shown in Figure 3.

Described flexible valve 2 is made up of flexible valve body and telescoping spool 21, and telescoping spool 21 is scalable to be arranged in flexible valve body, and the inner chamber of flexible valve body is divided into epicoele 23 and cavity of resorption 22 by telescoping spool 21.Epicoele 23 and cavity of resorption 22 are respectively arranged with two oil circuit interfaces, and two oil circuit interfaces of cavity of resorption 22 connect oil duct A and A oil cylinder interface A ' respectively, and two oil circuit interfaces of epicoele 23 connect oil duct B and B oil cylinder interface B ' respectively.Further, the part that telescoping spool 21 is positioned at cavity of resorption 22 is provided with bulge loop, and telescoping spool 21 is in two oil circuit interfaces that bulge loop when returning state separates cavity of resorption 22 makes it not be communicated with, and the medium entering cavity of resorption 22 from oil duct A promotes telescoping spool 21 and stretches out; Telescoping spool 21 stretches out the reach of rear bulge loop, two oil circuit orifice of cavity of resorption 22, and medium flows into hydraulic jack 3 by flexible valve 2 from A oil cylinder interface A '.

Described hydraulic jack 3 is provided with A oil cylinder interface A ' and B oil cylinder interface B ', A oil cylinder interface A ' and B oil cylinder interface B ' and lays respectively at piston 31 both sides.A oil cylinder interface A ' is connected with oil duct C.

In the present embodiment, oil duct A, cavity of resorption 22 connect to form A oil circuit with the A oil cylinder interface A ' of hydraulic jack 3, and oil duct B, epicoele 23 connect to form B oil circuit with the B oil cylinder interface B ' of hydraulic jack 3.Described hydraulic jack 3 is preferably the operating cylinder for bending reinforcing steel bar.With reference to Fig. 2, Fig. 3, the working procedure of the present embodiment is as follows: before use, first utilizes oil pipe and supply reservoir to couple together respectively oil-feed oil duct P and emptying oil duct O.Medium from supply reservoir out, successively through oil passage control valve 1, flexible valve 2 and hydraulic jack 3.As shown in Figure 2, when controlling spool 11 and moving to right, the medium entered from fuel tank walks A oil circuit, is entered the cavity of resorption 22 of flexible valve 2 by oil duct A, and medium promotes telescoping spool 21 and stretches out, and clamps the reinforcing bar be placed in hydraulic bending mechanism; After telescoping spool 21 stretches out completely, medium flows into hydraulic jack 3 by flexible valve 2 from A oil cylinder interface A ', and the piston 31 promoting hydraulic jack 3 stretches out, and carries out reinforcing bar bending action; The medium being simultaneously positioned at piston 31 right is discharged by B oil circuit.As shown in Figure 3, when controlling spool 11 and moving to left, the medium entered from fuel tank walks B oil circuit, medium is introduced into the epicoele 23 of flexible valve 2, promote telescoping spool 21 to return, medium flows into hydraulic jack 3 by flexible valve 2 from B oil cylinder interface B ', and the piston 31 promoting hydraulic jack 3 is return; Meanwhile, the medium of flexible valve 2 cavity of resorption 22 is discharged by A oil circuit, and the medium on hydraulic jack 3 left side is discharged by oil duct C.The advantage of the present embodiment is, when carrying out reinforcing bar bending, after telescoping spool 21 stretches out clamping reinforcing bar completely, and hydraulic jack 3 just action, and without the need to arranging pressure switch 6.

Embodiment two:

With reference to Fig. 4, the second embodiment provided by the invention, comprises oil passage control valve 4, flexible valve 5 and hydraulic jack 3.

Described oil passage control valve 4 is made up of control valve body and control spool 41, and control spool 41 is arranged in control valve body and also can moves left and right.Control valve body is provided with oil duct A, oil duct B, oil-feed oil duct P and multiple emptying oil duct O.Control spool 41 is provided with two connecting grooves.When controlling spool 41 and moving to right, oil duct A connects oil-feed oil duct P, and oil duct B connects emptying oil duct O, as shown in Figure 5; When controlling spool 41 and moving to left, oil duct B connects oil-feed oil duct P, and oil duct A connects emptying oil duct O, as shown in Figure 6.

Described flexible valve 5 is made up of flexible valve body and telescoping spool 51, and telescoping spool 51 is scalable to be arranged in flexible valve body, and the inner chamber of flexible valve body is divided into epicoele 53 and cavity of resorption 52 by telescoping spool 51.Epicoele 53 and cavity of resorption 52 are respectively arranged with two oil circuit interfaces, and two oil circuit interfaces of cavity of resorption 52 connect oil duct A and A oil cylinder interface A ' respectively, and two oil circuit interfaces of epicoele 53 connect oil duct B and B oil cylinder interface B ' respectively.Flexible valve body is also provided with emptying oil duct O.Further, the part that telescoping spool 51 is positioned at cavity of resorption 52 is provided with bulge loop, when telescoping spool 51 is in and returns state, A oil cylinder interface A ' connects the emptying oil duct O on flexible valve body by the oil circuit interface of cavity of resorption 52, two oil circuit interfaces that simultaneously bulge loop separates cavity of resorption 52 make it not be communicated with, and the medium entering cavity of resorption 52 from oil duct A promotes telescoping spool 51 and stretches out; Telescoping spool 51 stretches out the reach of rear bulge loop, closes emptying oil duct O, simultaneously two oil circuit orifice of cavity of resorption 52, and medium flows into hydraulic jack 3 by flexible valve 5 from A oil cylinder interface A '.

Described hydraulic jack 3 is provided with A oil cylinder interface A ' and B oil cylinder interface B ', A oil cylinder interface A ' and B oil cylinder interface B ' and lays respectively at piston 31 both sides.Further, pressure switch 6 is provided with between the oil circuit interface of A oil cylinder interface A ' and cavity of resorption 52.

In the present embodiment, oil duct A, cavity of resorption 52, pressure switch 6 connect to form A oil circuit with the A oil cylinder interface A ' of hydraulic jack 3, and oil duct B, epicoele 53 connect to form B oil circuit with the B oil cylinder interface B ' of hydraulic jack 3.With reference to Fig. 5, Fig. 6, the working procedure of the present embodiment is as follows: before use, first utilizes oil pipe and supply reservoir to couple together respectively oil-feed oil duct P and emptying oil duct O.Medium from supply reservoir out, successively through oil passage control valve 4, flexible valve 5 and hydraulic jack 3.As shown in Figure 5, when controlling spool 41 and moving to right, the medium entered from fuel tank walks A oil circuit, is entered the cavity of resorption 52 of flexible valve 5 by oil duct A, and medium promotes telescoping spool 51 and stretches out, and clamps the reinforcing bar be placed in hydraulic bending mechanism; After telescoping spool 51 stretches out completely, medium, by flexible valve 5 and pressure switch 6, flows into hydraulic jack 3 from A oil cylinder interface A ', and the piston 31 promoting hydraulic jack 3 stretches out, and carries out reinforcing bar bending action; The medium being simultaneously positioned at piston 31 right is discharged by B oil circuit.As shown in Figure 6, when controlling spool 41 and moving to left, the medium entered from fuel tank walks B oil circuit, medium is introduced into the epicoele 53 of flexible valve 5, promote telescoping spool 51 to return, medium flows into hydraulic jack 3 by flexible valve 5 from B oil cylinder interface B ', and the piston 31 promoting hydraulic jack 3 is return; Meanwhile, the medium of flexible valve 5 cavity of resorption 52 is discharged by A oil circuit, and the medium on hydraulic jack 3 left side, by after pressure switch 6, enters flexible valve 5, and discharges from the emptying oil duct O of flexible valve 5.

Embodiment three:

With reference to Fig. 7, the 3rd embodiment provided by the invention, comprises oil passage control valve 7, flexible valve 8 and hydraulic jack 3.

Described oil passage control valve 7 is made up of control valve body and control spool 71, and control spool 71 is arranged in control valve body and also can moves left and right.Control valve body is provided with oil duct A, oil duct B, oil-feed oil duct P and multiple emptying oil duct O.Control spool 71 is provided with two connecting grooves.When controlling spool 71 and moving to right, oil duct A connects oil-feed oil duct P, and oil duct B connects emptying oil duct O, as shown in Figure 8; When controlling spool 71 and moving to left, oil duct B connects oil-feed oil duct P, and oil duct A connects emptying oil duct O, as shown in Figure 9.

Described flexible valve 8 is made up of flexible valve body and telescoping spool 81, and telescoping spool 81 is scalable to be arranged in flexible valve body, and the inner chamber of flexible valve body is divided into epicoele 83 and cavity of resorption 82 by telescoping spool 81.Epicoele 83 and cavity of resorption 82 are respectively arranged with two oil circuit interfaces, and two oil circuit interfaces of cavity of resorption 82 connect oil duct A and A oil cylinder interface A ' respectively, and two oil circuit interfaces of epicoele 83 connect oil duct B and B oil cylinder interface B ' respectively.

Described hydraulic jack 3 is provided with A oil cylinder interface A ' and B oil cylinder interface B ', A oil cylinder interface A ' and B oil cylinder interface B ' and lays respectively at piston 31 both sides.Further, pressure switch 6 is provided with between A oil cylinder interface A ' and the oil circuit interface of cavity of resorption 82, the force value lower limit that pressure switch 6 is arranged through, after medium forms certain pressure in flexible valve body or hydraulic jack 3, ability is by pressure switch 6, and this arranges and ensures that telescoping spool 81 carries out action prior to the piston 31 of hydraulic jack 3 further.

In the present embodiment, oil duct A, cavity of resorption 82, pressure switch 6 connect to form A oil circuit with the A oil cylinder interface A ' of hydraulic jack 3, and oil duct B, epicoele 83 connect to form B oil circuit with the B oil cylinder interface B ' of hydraulic jack 3.With reference to Fig. 8, Fig. 9, the working procedure of the present embodiment is as follows: before use, first utilizes oil pipe and supply reservoir to couple together respectively oil-feed oil duct P and emptying oil duct O.Medium from supply reservoir out, successively through oil passage control valve 7, flexible valve 8 and hydraulic jack 3.As shown in Figure 8, when controlling spool 71 and moving to right, the medium entered from fuel tank walks A oil circuit, is entered the cavity of resorption 82 of flexible valve 8 by oil duct A, and medium promotes telescoping spool 81 and stretches out, and clamps the reinforcing bar be placed in hydraulic bending mechanism; When the pressure medium of cavity of resorption 82 reaches being prescribed a time limit by lower of pressure switch 6, medium flows into hydraulic jack 3 from A oil cylinder interface A ', and the piston 31 promoting hydraulic jack 3 stretches out, and carries out reinforcing bar bending action; The medium being simultaneously positioned at piston 31 right is discharged by B oil circuit.As shown in Figure 9, when controlling spool 71 and moving to left, the medium entered from fuel tank walks B oil circuit, medium is introduced into the epicoele 83 of flexible valve 8, promote telescoping spool 81 to return, medium flows into hydraulic jack 3 by flexible valve 8 from B oil cylinder interface B ', and the piston 31 promoting hydraulic jack 3 is return; Meanwhile, the medium on hydraulic jack 3 left side is discharged by A oil circuit.

Contrast prior art, expansion device of the present invention adopts the oil circuit trend of oil passage control valve control media, the action of flexible valve and hydraulic jack is controlled by separate A oil circuit and B oil circuit, A oil circuit and B oil circuit separate, be independent of each other, simplify oil channel structures, make the structure of all parts simple, reduce production difficulty, ensure that the action of flexible valve and hydraulic jack is carried out in order, realizes interlock simultaneously.In addition, expansion device of the present invention is not limited to use on bending mechanism, and this expansion device also can be applicable to other industry equipments adopting hydraulic power realize interlock, applied widely, is easy to promote.

These are only preferred embodiments of the present invention, as long as the technological scheme realizing the object of the invention with basic same approach all belongs within protection scope of the present invention.

Claims (6)

1. a hydraulic pressure oil duct piggybacking expansion device, comprises hydraulic jack, and described hydraulic jack is provided with the A oil cylinder interface and B oil cylinder interface that lay respectively at piston both sides, it is characterized in that: described expansion device comprises,
Oil passage control valve, be made up of control valve body and control spool, control spool is arranged in control valve body and also can moves left and right,
Flexible valve, is made up of flexible valve body and telescoping spool, and telescoping spool is scalable to be arranged in flexible valve body, and the inner chamber of flexible valve body is divided into epicoele and cavity of resorption by telescoping spool;
Described control valve body is provided with oil-feed oil duct, emptying oil duct and oil duct A, oil duct B, control spool is provided with plural connecting groove, oil-feed oil duct, emptying oil duct are communicated with oil duct A or oil duct B respectively by connecting groove, and oil-feed oil duct is communicated with from different oil ducts with emptying oil duct simultaneously;
Described epicoele and cavity of resorption are respectively arranged with two oil circuit interfaces, and two oil circuit interfaces of cavity of resorption connect A oil cylinder interface and oil duct A respectively, and two oil circuit interfaces of epicoele connect B oil cylinder interface and oil duct B respectively.
2. a kind of hydraulic pressure oil duct piggybacking expansion device according to claim 1, it is characterized in that: the part that described telescoping spool is positioned at cavity of resorption is provided with bulge loop, telescoping spool is in two oil circuit interfaces that bulge loop when returning state separates cavity of resorption makes it not be communicated with, and the medium entering cavity of resorption from oil duct A promotes telescoping spool and stretches out; Telescoping spool stretches out the reach of rear bulge loop, two oil circuit orifice of cavity of resorption.
3. a kind of hydraulic pressure oil duct piggybacking expansion device according to claim 2, is characterized in that: described control valve body is provided with oil duct C, and oil duct C connects A oil cylinder interface, when oil duct A is connected with oil-feed oil duct, controls spool jams oil duct C; When oil duct A is connected with emptying oil duct, oil duct C connects emptying oil duct by connecting groove.
4. a kind of hydraulic pressure oil duct piggybacking expansion device according to claim 2, it is characterized in that: described flexible valve body is provided with emptying oil duct, when telescoping spool is in and returns state, A oil cylinder interface connects the emptying oil duct on flexible valve body by the oil circuit interface of cavity of resorption; Telescoping spool stretches out rear enclosed emptying oil duct.
5. a kind of hydraulic pressure oil duct piggybacking expansion device according to claim 1 or 4, is characterized in that: be provided with pressure switch between described A oil cylinder interface and the oil circuit interface of cavity of resorption.
6. a kind of hydraulic pressure oil duct piggybacking expansion device according to claim 1, is characterized in that: described control valve body is provided with multiple emptying oil duct.
CN201510263128.1A 2015-05-21 2015-05-21 A kind of hydraulic pressure oil duct piggybacking retractor device CN104879338B (en)

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CN201510263128.1A CN104879338B (en) 2015-05-21 2015-05-21 A kind of hydraulic pressure oil duct piggybacking retractor device

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CN201510263128.1A CN104879338B (en) 2015-05-21 2015-05-21 A kind of hydraulic pressure oil duct piggybacking retractor device

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CN104879338B CN104879338B (en) 2017-03-29

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1284946A (en) * 1968-08-14 1972-08-09 Kawasaki Heavy Ind Ltd Oil pressure controlling device for high inertia loads
US3881512A (en) * 1973-09-21 1975-05-06 Koehring Co Hydraulic control valve and pressure compensating mechanism therefor
CN103089739A (en) * 2013-02-06 2013-05-08 冯广建 Linkage telescopic valve applied to rebar forming machine bending mechanism
CN203081886U (en) * 2012-12-26 2013-07-24 杭州朗杰测控技术开发有限公司 Integral valve
CN203685737U (en) * 2014-01-08 2014-07-02 浙江大学 Automatic reversing slide valve
CN104358726A (en) * 2014-10-14 2015-02-18 冯广建 One-piece bent pin expansion and contraction device of hydraulic bending mechanism
CN204729376U (en) * 2015-05-21 2015-10-28 冯广建 A kind of hydraulic pressure oil duct piggybacking expansion device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1284946A (en) * 1968-08-14 1972-08-09 Kawasaki Heavy Ind Ltd Oil pressure controlling device for high inertia loads
US3881512A (en) * 1973-09-21 1975-05-06 Koehring Co Hydraulic control valve and pressure compensating mechanism therefor
CN203081886U (en) * 2012-12-26 2013-07-24 杭州朗杰测控技术开发有限公司 Integral valve
CN103089739A (en) * 2013-02-06 2013-05-08 冯广建 Linkage telescopic valve applied to rebar forming machine bending mechanism
CN203685737U (en) * 2014-01-08 2014-07-02 浙江大学 Automatic reversing slide valve
CN104358726A (en) * 2014-10-14 2015-02-18 冯广建 One-piece bent pin expansion and contraction device of hydraulic bending mechanism
CN204729376U (en) * 2015-05-21 2015-10-28 冯广建 A kind of hydraulic pressure oil duct piggybacking expansion device

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