CN2592933Y

CN2592933Y - Two-way manual hydraulic change valve

Info

Publication number: CN2592933Y
Application number: CN 02295498
Authority: CN
Inventors: 汤利国
Original assignee: HUAGUANG TOOLS FACTORY SHANGHAI CITY
Current assignee: HUAGUANG TOOLS FACTORY SHANGHAI CITY
Priority date: 2002-12-30
Filing date: 2002-12-30
Publication date: 2003-12-17
Anticipated expiration: 2012-12-30

Abstract

The utility model relates to a two-way manual hydraulic change valve for a two-way manual hydraulic pump, which comprises an upper one-way valve composed of an upper cavity 4, a channel 6, a steel ball 7, and an upper push rod 8, and a lower one-way valve composed of a lower cavity 5, a steel ball 10 and a spring 11, wherein, the two one-way valve form a reversing valve E through a supporting rod, and the other side of the reversing valve E is provided with a reversing valve E' which has a same structure with the reversing valve E and is parallel to the reversing valve E. Upper cavities 4 and 4' of the reversal valves are communicated with an oil return hole O, and lower cavities 5 and 5' are communicated with a pressure oil hole P, wherein, a channel 6 or 6' is communicated with a working oil passage A, and the other channel 6' or 6 is communicated with a working oil passage B; the upper end of the push rod is abutted with a plane cam. The utility model has the advantages that the two-way manual hydraulic change valve has a function of a three-position four-way valve; a pressure oil passage and an oil returning oil passage are not mutually influenced; the direction change and the pressure maintain are convenient; the idle stroke is volatile and quick, and the high pressure is strong in full load; the operation is simple; the work is stable; the utility model can be widely applied to the manual hydraulic pump.

Description

Two-way hand-hydraulic selector valve

Affiliated technical field

The utility model relates to a kind of hydraulicdirectional control valve, refers to a kind of hand-hydraulic selector valve especially, commutation or locking position when being specially adapted to two-way hydraulic hand-pump operation.

Background technique

Hydraulic hand-pump is a kind of by manpower extruder pressure oil, with the machinery of the oil cylinder acting that pushes the work forward, when non-transformer or field work, can be widely used in and move horizontally load or vertical-lift load.Hydraulic hand-pump is normally single, so its selector valve generally all adopts the single-acting selector valve.Chinese patent ZL98214405.9 discloses a kind of double-action hydraulic hand-pump, and it is integrated unloading valve and selector valve.But this valve is a kind of simple two position three-way valve, and function is poor, and traverse is slow, and is slow in reacting, can not adapt to the requirement of operations involving high pressure.

Summary of the invention

The purpose of this utility model provides a kind of two-way hand-hydraulic valve of novelty, has the function of three-position four-way valve, and not only commutation and pressurize are convenient, and idle running brisk fast, full load pressure is powerful, working stability is reliable.

A kind of two-way hand-hydraulic selector valve of the present utility model, comprise a valve body, one epicoele and a cavity of resorption are arranged in the valve body, one passage is arranged between the upper and lower chamber, in the epicoele by a last one-way valve of forming by steel ball and upper ejector pin, by a following one-way valve of being made up of steel ball and spring, the pole of being longer than passage slightly by a length between two one-way valves constitutes a selector valve in the cavity of resorption, is provided with a selector valve identical and parallel with the selector valve structure in addition in a side of selector valve; The epicoele of described two selector valves is communicated with drainback passage 0, and the cavity of resorption of two selector valves is communicated with pressure oil passage P; And the passage of one of them selector valve is communicated with working oil path A, and the passage of another selector valve is communicated with working oil path B; The upper end of described upper ejector pin links to each other with a changement.

Useful effect of the present utility model is that this two-way hand-hydraulic selector valve has the function of three-position four-way valve, pressure oil circuit and oil circuit are independent of each other, commutation and pressurize are convenient, idle running brisk fast, high pressure is powerful at full capacity the time, simple to operate, working stability is reliable, can extensive use on hydraulic hand-pump.

Description of drawings

Fig. 1 is an an embodiment's of the present utility model vertical section structure schematic representation;

Fig. 2 is two-way hydraulic hand-pump fundamental diagram.

Among the figure: 1 face cam, 2 mandrels, 3 valve bodies, 4,4 ' epicoele, 5,5 ' cavity of resorption, 6,6 ' passage, 7,7 ' steel ball, 8,8 ' upper ejector pin, 9,9 ' packing ring, 10,10 ' steel ball, 11,11 ' spring, 12,12 ' pole, 20 operating cylinders, 30 two-way hand-hydraulic selector valves, 40 hydraulic hand-pumps.

Embodiment

Now the utility model is described in further detail in conjunction with an embodiment and accompanying drawing thereof.

One embodiment as shown in Figure 1, comprise a valve body 3, one epicoele 4 and a cavity of resorption 5 are arranged in the valve body, one passage 6 is arranged between the upper and lower chamber, in the epicoele 4 by a last one-way valve of forming by steel ball 7 and upper ejector pin 8, by a following one-way valve of forming by steel ball 10 and spring 11, be longer than the pole 12 formations one selector valve E of passage 6 between two one-way valves slightly by a length in the cavity of resorption 5, be provided with a selector valve E ' identical and parallel in addition with selector valve E structure in the side of selector valve E; The epicoele 4,4 of described two selector valves ' be communicated with drainback passage 0, the cavity of resorption 5,5 of two selector valves ' be communicated with pressure oil passage P; And the passage 6 or 6 of one of them selector valve ' be communicated with working oil path A, the passage 6 of another selector valve ' or 6 be communicated with working oil path B; Described upper ejector pin 8 and 8 ' the upper end link to each other with a changement.

Wherein said two upper ejector pins 8 and 8 of going up one-way valves ' upper end and a face cam 1 camming surface offset, this face cam 1 is hubbed on the mandrel 2, can be around these mandrel 2 rotations, and between three positions, change at least, described mandrel 2 is fixedly arranged on valve body 3.

Rotate the face cam 1 of selector valve 30, can promote simultaneously two upper ejector pins 8 and 8 ', and change the open and-shut mode of four one-way valves in the valve body, thereby change the flow direction of pressure oil and oil return in the hydraulic hand-pump 40, realize the switching of oil circuit, finish two-way fuel feeding and off-load operating cylinder 20.

This two-way hand-hydraulic selector valve 30 can be installed in the side of hydraulic hand-pump 40, function with three-position four-way valve, wherein, pressure oilhole P on the selector valve 30 communicates with the pressure oil circuit of hydraulic hand-pump 40, spill port 0 communicates with the oil conservator of hydraulic hand-pump 40 on the selector valve 30, there are two work oilhole A, B to communicate on the selector valve 30 in addition, as shown in Figure 2 with operating cylinder 20.

Three positions of corresponding flat cam 1, selector valve 20 has three kinds of working staties:

1. unloading condition: when the camming surface of face cam 1 equates two upper ejector pins 8 and 8 ' highly, spring 11 and 11 ' effect under, four one-way valves all are shown in an open position, pressure oil in the oil hydraulic pump 40 through pressure oilhole P enter cavity of resorption 5 and 5 ' after, by four one-way valves of opening by passage 6 and 6 ' enter epicoele 4 and 4 ', directly go into the oil conservator of oil hydraulic pump for 0 time through spill port.

2.A oil-feed, B oil return state: when camming surface compresses upper left push rod 8, unclamps 8 ' time of upper right push rod, the steel ball 7 on the left side is subjected to the roof pressure of push rod 8 to cut out last left one-way valve, and promotes pole 12, backs down steel ball 10, opens the lower-left one-way valve; Simultaneously because upper right push rod 8 ' loosened, spring 11 ', close the bottom right one-way valve with steel ball 10 ' go up the top, and promote pole 12 ' withstand steel ball 7 ', opened upper right one-way valve.At this moment, pressure oil enters the cavity of resorption 5,5 of valve ' and through passage 6 and working oil path B, enter operating cylinder through the P mouth; Working oil path A is through passage 6 ' enter epicoele 4 ' to spill port 0.

3.B oil-feed, A oil return state: when camming surface compress upper right push rod 8 ', when unclamping upper left push rod 8, the steel ball 7 on the right ' be subjected to push rod 8 ' roof pressure closed upper right one-way valve, and promote pole 12 ', back down steel ball 10 ', open the bottom right one-way valve; Simultaneously because upper left push rod 8 is loosened, and spring 11 has been closed the lower-left one-way valve with top on the steel ball 10, and promote pole 12 and withstand steel ball 7, opened upper left one-way valve.Referring to Fig. 1.At this moment, pressure oil enters the cavity of resorption 5,5 of valve ' and through passage 6 ' and working oil path A, enter operating cylinder 20 through hole P; Working oil path B enters epicoele 4 to spill port 0 through passage 6.

Claims

1. two-way hand-hydraulic selector valve, comprise a valve body, one epicoele and a cavity of resorption are arranged in the valve body, one passage is arranged between the upper and lower chamber, in the epicoele by a last one-way valve of forming by steel ball and upper ejector pin, by a following one-way valve of being made up of steel ball and spring, the pole of being longer than passage slightly by a length between two one-way valves constitutes a selector valve in the cavity of resorption, and it is characterized in that: the side at this selector valve has a selector valve identical and parallel with its structure in addition; The epicoele of described two selector valves is communicated with drainback passage 0, and the cavity of resorption of two selector valves is communicated with pressure oil passage P; And the passage of one of them selector valve is communicated with working oil path A, and the passage of another selector valve is communicated with working oil path B; The upper end of described push rod links to each other with a changement.

2. two-way hand-hydraulic valve according to claim 1 is characterized in that described changement is a face cam, and the upper ejector pin upper end of the camming surface of this face cam and two one-way valves offsets.

3. two-way hand-hydraulic valve according to claim 2 is characterized in that described face cam is hubbed at one and is fixedly arranged on the mandrel of valve body, and can change between three positions at least.