CN2706615Y

CN2706615Y - Rotary valve for hydraulic lifting system

Info

Publication number: CN2706615Y
Application number: CN 200420064973
Authority: CN
Inventors: 张在波
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-06-18
Filing date: 2004-06-18
Publication date: 2005-06-29
Anticipated expiration: 2014-06-18

Abstract

The utility model is a rotary valve for a hydraulic lift system, which comprises a valve body(9), a core axle(19), a handle, a pipe joint, a seal element and a positioning element. Wherein, the core axle(19) is provided with a blind oil passage(4) along the axial direction, and the blind oil passage(4) is plugged by a seal ring(3) at the right end of the core axle and a plug(8). The core axle(19) is also provided with branch oil passages(5) and (7) communicated with the blind oil passage(4) and an annular auxiliary oil groove(13), and the blind oil passage(4) is communicated with a pipe joint oil passage(14). An annular drain pan(6) communicated with the branch oil passage(7) is opened on the valve body(9). The plug(8) and the core axle(19) are connected through screw threads. The utility model has the advantage of cabinet structure, reliable performance, easy operation and strong versatility, etc. The rotary valve for a hydraulic lift system can be used on the lift mechanisms of various hydraulic systems such as tippers and lifters, etc. to control each action element to lift and descend.

Description

The rotary valve that is used for hydraulic lifting system

Technical field

The utility model is the rotary valve that is used for hydraulic lifting system, particularly a kind of liter and the control valve that falls that is used for each executive component of hydraulic lifting system control on various dumping cars, the lift.

Background technique

At present, the rotary valve that generally uses on the market be made up of parts such as valve body, mandrel, locating stud, pipe joint, backing plate, nut, handles, but mandrel all is solid, only is drilled with two oilholes at an angle to each other in radial direction; Do not have drain pan on the valve body, its defective is: after high pressure oil was squeezed into, mandrel is unidirectional to be subjected to the easy bending deflection of high pressure, and it is dumb to cause handle to be pulled, and it is quite painstaking to operate; And mandrel, O RunddichtringO use under eccentric state, and be easy to wear, reduced rotary valve pressurize ability, shortened the working life of rotary valve.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of rotary valve that is used for hydraulic lifting system that can overcome above-mentioned prior art defective is provided, stable, the flexible operation of this valve performance, in the hydraulic lifting system on the various dumping cars of may command, the lift liter of each executive component with fall.

The technological scheme that the utility model adopted is as follows: comprise valve body, mandrel, handle, pipe joint and sealing, positioning element.Mandrel is provided with blind oil duct vertically, and it also is provided with oil duct and the annular secondary oil groove that are communicated with blind oil duct, blind oil duct connecting pipe joint oil duct by the seal ring and the plug shutoff of axle right-hand member.On valve body, have the annular drain pan of connected component oil duct.Plug is connected with mandrel thread.

The utlity model has following major advantage:

One. structure is small and exquisite, and is in light weight, saves installing space, thereby is convenient to make, promote and reduce cost.

They are two years old. simple installation, and simple to operate, use flexibly.

They are three years old. and rational in infrastructure, reliable performance, good airproof performance, rate of fault is low, long service life.

They are four years old. and independence is strong, is not subjected to extraneous any factor affecting, has good anti-high pressure ability and pressurize ability.

They are five years old. and highly versatile can be used for controlling in the hydraulic lifting system on various dumping cars, the lift each executive component liter and falls.

Description of drawings

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

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the plan view of Fig. 1.

Fig. 4 is asphalt principle figure of the present utility model.

Embodiment

Structure of the present utility model such as Fig. 1, Fig. 2, shown in Figure 3: comprise valve body 9, mandrel 19, handle, pipe joint and sealing, positioning element.Two pipe joints are installed in bottom at valve body 9, and pipe joint is made up of connection block 10 and adaptor tube 12, and pipe joint is provided with red copper pad 16, backing plate 15, nut 11; Upper left quarter at valve body 9 is provided with locating stud 20, with the amplitude of fluctuation of restriction handle; Mandrel 19 is installed in valve body 9 holes, and they are by O RunddichtringO 3, space washer 17, jump ring 18 location; On valve body 9, also have the annular drain pan 6 of connected component oil duct 7.Mandrel 19 is provided with blind oil duct 4 vertically, and it is by the O RunddichtringO 3 and plug 8 shutoff of axle right-hand member, and plug 8 is threaded with mandrel 19; Mandrel 19 also is provided with oil duct 5,7 and the annular secondary oil groove 13 that is communicated with blind oil duct 4, blind oil duct 4 connecting pipe joint oil ducts 14.Handle is made of handle ball 1 and handlebar 2, and the lower end of handlebar 2 is contained on the left end of mandrel 19.

Above-mentioned oil duct 5,7 is vertical each other, respectively has two, and one of them oil duct 5 is positioned at the middle part of blind oil duct 4, and another oil duct 5 is communicated with an oil duct 7 on right side, and an oil duct 7 and pipe joint oil duct 14 are on the same axis; One of effect of propping up an oil duct 5 and an oil duct 7 is to guarantee suffered oil pressure equilibrium on the mandrel 19.Blind oil duct 4, an oil duct 5 and 7, drain pan 6 and secondary oil groove 13 can guarantee that all the storage area of high pressure oil in valve strengthens, reduce the axial resistance of high pressure oil in valve body, the sealing of enhanced leaktightness circle, make rotary valve have good anti-high pressure ability and pressurize ability, and stable action, flexible when each working state is changed mutually, reduce rate of fault greatly, increase the service life.

Above-mentioned handlebar 2 can nickel plating, plug 8, pipe joint, nut 11, backing plate 15 all can take blackening to handle, so both can make the rotary valve beautiful shape, can prevent each component corrosion of rotary valve again effectively, dumb or internal corrosion influence use with the prevention action.One of effect of blind oil duct 4 can reduce the weight of mandrel 19, thereby alleviates whole weight of the utility model.Valve body 9 can adopt cuboid shape, is guaranteeing that valve body is subjected under the high pressure unburstable prerequisite, and the wall thickness allowance of all directions is the thinnest, can make the utility model outward appearance small and exquisite like this, weight reduction and reducing cost.O RunddichtringO 3 and red copper pad 16 can prevent effectively that the rotary valve interior oil from exposing, and improve the pressurize ability.

Each conversion of operation state of this rotary valve is all carried out in closed circuit, is not subjected to extraneous any factor affecting.

Sketch working procedure of the present utility model below in conjunction with Fig. 4:

When handle is in B shown in Figure 2 place, the oil duct 14 of two pipe joints is by mandrel 19 shutoff, at this moment, the oil of fuel tank converts high pressure oil to through gear pump 21, this oil promotes oil cylinder piston and moves upward after oil pipe 22 is squeezed into oil cylinder bottom in the hydraulic system (among Fig. 4 shown in the C arrow solid line), realize hydraulic mechanism lifting function; When gear pump 21 stops to supply with high pressure oil, during being in, hydraulic mechanism stops state.

When handle was in A shown in Figure 2 place, the oil duct 14 of two pipe joints communicated with blind oil duct 4, so high pressure oil is flowed in the rotary valve through oil pipe 23 by the oil cylinder bottom, got back to fuel tank (D among Fig. 4 through oil pipe 24 again ₁Shown in the arrow dotted line); Simultaneously, poor because of the oil cylinder external and internal pressure, the hydraulic oil in the fuel tank is inhaled into fuel tank top through oil pipe 25, descends thereby promote oil cylinder piston, realizes hydraulic mechanism decline function (D among Fig. 4 ₂Shown in the arrow dotted line).

Claims

1. rotary valve that is used for hydraulic lifting system, comprise valve body (9), mandrel (19), handle, pipe joint and sealing, positioning element, it is characterized in that mandrel (19) is provided with blind oil duct (4) vertically, its seal ring (3) and plug (8) shutoff by the axle right-hand member, also be provided with the oil duct (5), (7) and the annular secondary oil groove (13) that are communicated with blind oil duct (4), blind oil duct (4) connecting pipe joint oil duct (14); On valve body (9), have the annular drain pan (6) of connected component oil duct (7); Plug (8) is threaded with mandrel (19).

2. rotary valve according to claim 1 is characterized in that oil duct (5), (7) are vertical each other, respectively has two, and one of them oil duct (5) is positioned at the middle part of blind oil duct (4), and another oil duct (5) is communicated with an oil duct (7) on right side.

3. rotary valve according to claim 2 is characterized in that an oil duct (7) and pipe joint oil duct (14) are on the same axis.