CN201141459Y

CN201141459Y - Double-mouth direct-action type pressure reducing valve

Info

Publication number: CN201141459Y
Application number: CNU200720195809XU
Authority: CN
Inventors: 张立刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-29
Filing date: 2007-10-29
Publication date: 2008-10-29
Anticipated expiration: 2017-10-29

Abstract

The utility model relates to a double-ported direct operated type pressure reducing valve, which is the double-ported direct operated type pressure reducing valve widely suitable for the occasion where the branch circuit pressure which is lower than the main circuit pressure is required to be obtained in a variety of types of hydraulic systems, in particular suitable for the large-scale high pressure and long-distance hydraulic system such as the coal mine underground emulsion system etc. where the working pressure is required to be partially reduced. The double-ported direct operated type pressure reducing valve is composed of a casing body, a valve core, a valve core sleeve, a locking nut, a spring, a liquid inlet opening and a liquid outlet opening. The using scope of a plurality of the low-pressure tool products in the high-pressure system can be greatly enlarged, for example, the using amount of the tools such as the emulsion drilling machine, the emulsion saw and the emulsion spanner etc. in the underground emulsion system are greatly increased, the utilization efficiency of the energy of the high pressure system can be enhanced, in particular the mechanized operating level in the execrable working environment such as the underground coal mine, etc. is enhanced.

Description

The twoport direct acting pressure

Technical field

The utility model relates to a kind of twoport direct acting pressure, be widely used in needing to obtain to be lower than in the hydraulic system of various types the branch road pressure applications of main road pressure, be particularly useful under the coal mine needing the local twoport direct acting pressure that reduces working pressure in large-scale high pressure, the remote hydraulic system such as emulsion system.

Background technique

Reduction valve is the hydraulic element commonly used in the hydraulic system, is used for obtaining to be lower than the branch road pressure of main road pressure.At present, standardization of the structure of reduction valve and seriation, on structure, all have liquid entering hole, liquid outlet, three working solution interfaces of flow-off and main valve, two spools of pilot valve, flow-off must directly take back fuel tank, assurance fluid is unimpeded, otherwise the draining hole has back pressure can influence the proper functioning of reduction valve.Though there is different structural designs in the reduction valve product of different manufacturers, but all adopt the working principle of three working solution interfaces and double spool design, though can higher precision be arranged to pressure control, but because interface is more, great majority adopt board-like connection design, be mainly used in the hydraulic system power station, be not suitable for installing from the scene of work station working position far away; Even take on-the-spot tubular type to connect, owing to need to connect three oil pipes, convenience of use also is affected; The design of employing pilot valve, structure are comparatively complicated, and the filter precision of working medium is had relatively high expectations, and contamination resistance is poor, can not adapt to such as the inferior work under bad environment of coal mine, the occasion that the working medium precision is difficult to guarantee.

The model utility purpose

The purpose of this utility model is exactly to have deficiency at prior art, provide a kind of compact overall structure light, installation exercise is convenient, contamination resistance is strong, is particularly useful for the inferior abominable working environment of coal mine and frequently disconnects twoport direct acting pressure in large-scale high pressure such as operation, the remote hydraulic system.

The model utility content

The purpose of this utility model is achieved in that the twoport direct acting pressure that this twoport direct acting pressure is made up of housing, spool, valve core housing, locking nut, spring, liquid entering hole, liquid outlet, and it has liquid entering hole and 2 connection mouths of liquid outlet; The outer ring-like guiding gutter of valve core housing communicates with liquid entering hole, and endoporus communicates with liquid outlet; Spool is installed in the endoporus of valve core housing, and an end is by spring compression, and the other end is in the low-pressure cavity, and spool face is provided with inlet opening and is positioned at the damping hole of different axial positions with several; Look nut is installed on the housing with thread forms, by screwing in and the decrement that screws out Regulation spring.

Distinguishing feature

Distinguishing feature of the present utility model is:

1, has only liquid entering hole and liquid outlet, do not have flow-off, can be connected on and obtain lower working pressure in the branch roads system, link to each other with the far-end power station, simplified installation exercise and need not to add in addition a drain line;

2, have only a work spool, the function of pilot valve is integrated on the main valve, i.e. the direct-acting type control type, cancelled the pilot valve design, contamination resistance is strengthened, be particularly useful for the inferior abominable working environment of coal mine and frequently disconnect operation, the unmanageable occasion of working medium precision;

3, have a plurality of damping holes that are distributed in diverse location on the spool, when spool is positioned at diverse location, produce the variation of damping area, realize the variation of range of regulation;

4, form regulator by single spring or by combined type spring and look nut that the different springs of several Young's modulus are formed, can realize the constant output of pressure according to the variation in pressure self regulating valve core position of liquid outlet.

For this reason, the utility model is expanded the using scope of many low press tool series products in high-pressure system greatly, for example the use amounts of instrument in the emulsion system of down-hole such as emulsion boring machine, emulsified liquid saw, emulsified liquid spanner will increase greatly, improve the energy utilization efficiency of high-pressure system, particularly improved the mechanized operation level of the inferior abominable working environment of coal mine, had good economic benefits and social benefit.

Description of drawings

Fig. 1 is the utility model structural representation

Fig. 2 is spool working state force analysis figure in the utility model

Fig. 3 is a valve core structure schematic representation in the utility model

Fig. 4 is the board-like connectivity scenario attachment hole of a utility model schematic representation

Fig. 5 is the board-like connectivity scenario structural representation of the utility model

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing

Fig. 1, locking nut 1, look nut 2, spring 3, housing 4, spool 5, liquid entering hole 6, hyperbaric chamber 7, valve pocket guiding gutter 8, low-pressure cavity 9, liquid outlet 10, valve core housing 11, spool inlet opening 12 and spool damping hole 13.

Fig. 2, system pressure P1, valve outlet port pressure P 2, the suffered spring force F1 of spool ,-suffered hydraulic coupling F2 of spool and spool work area S.

Fig. 3, inlet opening 12, damping hole 13, valve core rod 14 and valve core case 15.

Fig. 4, liquid entering hole 16, liquid outlet 17 and mounting hole 18.

Current, the large hydraulic system is used in many workplaces, as the emulsion system under the coal mine etc.Their characteristics are working pressure height (being higher than 30MPa), fed distance (surpassing 1000m) far away.In the time need using some low-voltage equipment, then need to install reduction valve to obtain to be lower than the branch road pressure of system pressure in the working end.This twoport direct acting pressure is made up of housing 4, spool 5, valve core housing 11, look nut 2, locking nut 1, spring 3, liquid entering hole 6, liquid outlet 10 and damping hole 13, liquid entering hole 6 and liquid outlet 10 are fixed on the housing with welding or thread connecting mode, also can directly process on housing; Valve core housing 11 is installed in the housing 4, and the outer ring-like guiding gutter 8 of valve core housing 11 communicates with liquid entering hole 6, forms reduction valve hyperbaric chamber 7, and center hole communicates with liquid outlet 10, forms reduction valve low-pressure cavity 9; Spool 6 is installed in the center hole of valve core housing, one end is compressed by spring 3, the other end is in the low-pressure cavity 9, the surface has inlet opening 12 and several to be positioned at the damping hole 13 of different axial positions, total area of passage of damping hole 13 changes because of the change in location of spool 5, inlet opening 8 links to each other with the duct of damping hole 13 by spool 5 inside, and fluid can enter valve core inside through spool inlet opening 12 from hyperbaric chamber 7, enters low-pressure cavity 9 through damping hole 13 again; Spring 3 is installed in the housing 4, promptly can be single spring, also can become the combined type spring by the different cluster spring of several Young's modulus, and an end is pressed in the nothing oil end of spool 5, and an end is held out against by look nut 2; Look nut 2 is installed on the housing 5 with thread forms, by screwing in and the decrement that screws out Regulation spring 3; Locking nut 1 is installed in the outside that reaches look nut 2 on the housing 5 with thread forms, prevents the loosening of look nut 2 by screwing.The installation form of reduction valve has two kinds: both can be designed as stand-alone configuration, in liquid entering hole 8 and liquid outlet 10 series connection feed liquor pressing systems, the realization tubular type connects, again can be on housing the design and installation hole, fixed being installed on the valve plate, liquid entering hole 8 and liquid outlet 10 are communicated with valve plate, realize board-like connection.

The complete working procedure of reduction valve is as follows:

Reduction valve is connected in series in the feed liquor pressing system by liquid entering hole 6 and liquid outlet 10, and liquid entering hole 6 links to each other with the system high pressure pipeline, and liquid outlet 10 links to each other with the equipment that needs lower pressure.Go into manometer (as pressure gauge) in liquid outlet 10 1 terminations, by rotating the liquid outlet pressure P 2 that look nut 2 obtains being fit to.

System high pressure liquid P1 enters spool 5 by liquid entering hole 6 through the inlet opening 12 of spool 5, and the damping hole on spool 5 13 reaches liquid outlet 10 then.Because the effect of damping hole 13, the pressure P 2 of liquid outlet 10 is less than system pressure P1.Simultaneously, spool 5 is subjected to liquid outlet pressure P 2 and acts on the initial pretightening force F1 that spool 5 end face S go up generation hydraulic coupling F2=P2 * S and spring (3,4).Spool 5 moves to look nut 2 directions under the force action of F1 and F2, and the elastic force F1 of spring (3,4) increases, and when F1=P2/S, spool 5 is stabilized in this position, and reduction valve produces pressure stable output P2.Adjust look nut 2 positions, can obtain different delivery pressure P2.Cause delivery pressure P2 fluctuation when working load changes, when pressure variety was Δ P, then spool 5 was subjected to force unbalance Δ F=Δ P * S.Spool 5 produces change in location under Δ F effect, cause the damping area change of spool 5:

1) as Δ P＞0, spool 5 is the left-hand motion in figure, and damping hole 13 total area of passages reduce, and increase falls in the pressure that produces because of damping function, then liquid outlet pressure P 2 declines (being approximately Δ P);

2) as Δ P＜0, spool 5 dextrad motion in figure, damping hole 13 total area of passages increase, and the pressure that produces because of damping function falls and reduces then liquid outlet pressure P 2 risings (being approximately-Δ P).

All can make liquid outlet pressure P 2+ Δ P recover set pressure P2 under two kinds of situations.

Claims

1, a kind of twoport direct acting pressure of being made up of housing, spool, valve core housing, locking nut, spring, liquid entering hole, liquid outlet is characterized in that it has liquid entering hole and 2 connection mouths of liquid outlet; The outer ring-like guiding gutter of valve core housing communicates with liquid entering hole, and endoporus communicates with liquid outlet; Spool is installed in the endoporus of valve core housing, and an end is by spring compression, and the other end is in the low-pressure cavity, and spool face is provided with inlet opening and is positioned at the damping hole of different axial positions with several; Look nut is installed on the housing with thread forms, by screwing in and the decrement that screws out Regulation spring.

2, twoport direct acting pressure as claimed in claim 1, the installation form that it is characterized in that it can be designed as stand-alone configuration, in liquid entering hole and liquid outlet series connection feed liquor pressing system, the realization tubular type connects, or on housing the design and installation hole, fixed being installed on the valve plate makes liquid entering hole and liquid outlet communicate with oilhole on the valve plate, realizes board-like connection.