CN202469169U - Pressure pilot valve - Google Patents
Pressure pilot valve Download PDFInfo
- Publication number
- CN202469169U CN202469169U CN2012200994901U CN201220099490U CN202469169U CN 202469169 U CN202469169 U CN 202469169U CN 2012200994901 U CN2012200994901 U CN 2012200994901U CN 201220099490 U CN201220099490 U CN 201220099490U CN 202469169 U CN202469169 U CN 202469169U
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- Prior art keywords
- valve rod
- diameter
- valve
- oil outlet
- pressure
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Abstract
The utility model discloses a pressure pilot valve. The pressure pilot valve comprises a base, a valve stem, an oil inlet, an oil outlet and a travel spring which is used for controlling the movement amount of the valve stem, wherein an axial hole is formed in the base; the valve stem penetrates into the axial hole and is in clearance fit with the base; and the oil inlet and the oil outlet are formed in the base. The pressure pilot valve is characterized in that in a pressure balance state, the diameter of the position, corresponding to the oil inlet or the oil outlet, of the valve stem, is equal to the inner diameter of the axial hole, the diameters of the valve stem on the two sides of the position are less than the inner diameter of the axial hole, a transition angle between a large-diameter section and a small-diameter section of the valve stem is an arc angle, a spring, a sealing ball and a push rod are sequentially arranged at the oil inlet or the oil outlet, the diameter of the push rod is less than that of a corresponding oil-inlet pipeline or oil-outlet pipeline, one end of the spring is fixedly arranged at the end far away from the valve stem, and the push rod jacks the valve stem. The valve can be opened under a high pressure and a low pressure.
Description
Technical field
The utility model relates to a kind of pressure pilot valve, all openable pressure pilot valve during especially a kind of high-pressure and low-pressure.
Background technique
Present pressure pilot valve is divided into two kinds; A kind of is when control-oil pressure control valve events when setting operating range; Another kind is when control-oil pressure control valve events when setting operating range, but does not have a kind of all movable pressure pilot valve of valve can realize high pressure or low pressure simultaneously the time, realize simultaneously that above-mentioned high pressure and low voltage control must install two valves simultaneously and lay corresponding oil circuit; This makes the control process complications, and has increased installation and maintenance cost.
In view of this, special the utility model that proposes.
The model utility content
The technical problem that the utility model will solve is to overcome the deficiency of existing technology, all openable pressure pilot valve when providing an a kind of valve just can realize high-pressure and low-pressure.
For solving the problems of the technologies described above, the utility model adopts the basic design of technological scheme to be:
A kind of pressure pilot valve comprises pedestal, valve rod, filler opening, oil outlet and the momental stroke spring of control valve rod, and pedestal is provided with axial bore; Said valve rod be located in this axial bore and with the pedestal Spielpassung; Filler opening and oil outlet are opened on the pedestal, and when pressure balance, the diameter of said valve rod and filler opening or oil outlet corresponding position equals the internal diameter of axial bore; The diameter of the valve rod of these both sides, position is less than the internal diameter of axial bore; Excessive angle between said valve rod enlarged diameter section and the reduced diameter section is an arc round angle, is provided with spring, ball sealer and push rod successively at filler opening or oil outlet place, and rod diameter is less than the diameter of corresponding filler opening pipeline or oil outlet pipeline; Spring one end is fixed on the end away from valve rod, and push rod withstands valve rod.
Preferably, when pressure balance, a groove is respectively established in the both sides of valve rod and filler opening or oil outlet corresponding position.
Another kind of preferred version, said valve rod is that two ends are thin, the bar that intermediate section is thick; The diameter of the part that valve rod is thin is less than the internal diameter of axial bore; The diameter of thick part equals the internal diameter of axial bore, and when pressure balance, the part that valve rod is thick gets lodged in filler opening or oil outlet place.
For such scheme, preferred, said stroke spring is a dish formula spring.
After adopting technique scheme; The utility model compared with prior art has following beneficial effect: block oil circuit by valve rod when the utility model utilizes state of equilibrium; When pressure changes (comprise pressure become big or diminish) thus the time valve rod move and make position thinner on the valve rod be positioned at filler opening or the oil outlet place opens valve, thereby all openable purpose of valve when a valve just can be realized high-pressure and low-pressure.
Be described in further detail below in conjunction with the embodiment of accompanying drawing the utility model.
Description of drawings
Fig. 1 is the outside schematic representation of the utility model pressure pilot valve;
Fig. 2 is the schematic internal view of Fig. 1;
Fig. 3 is the partial enlarged drawing of A part among Fig. 2.
Embodiment
Embodiment 1:
Like Fig. 1, Fig. 2 and shown in Figure 3, the utility model is a kind of pressure pilot valve, comprises pedestal 1, valve rod 2, offers an axial bore on pedestal 1 top; Said valve rod 2 be located in this axial bore and with pedestal 1 Spielpassung, offer a shoulder hole in pedestal 1 bottom, this shoulder hole is little near the internal diameter in the hole of pedestal 1 bottom surface; As control oil pocket 3, connect control oil channel, for pilot valve provides pilot pressure; The internal diameter in hole that gos deep into pedestal 1 the inside is big, and the plunger 4 of valve rod 2 bottoms is positioned at this hole (plunger storage chamber 5), and plunger 4 is the cylindrical plugs of a sectional area greater than valve rod 2 sectional areas; With plunger storage chamber 5 Spielpassung; This plunger storage chamber is reserved one section space for plunger in the axial direction, offers filler opening 6, oil outlet 7 with valve rod 2 corresponding positions on the pedestal 1, controls valve rod 2 momental stroke springs 8 in addition.
(be generally the operating range of setting in advance as required, when this scope, valve is in state of equilibrium in pressure balance; Be failure to actuate, therefore be referred to as plateau) time, said valve rod 2 equals the valve pocket internal diameter with the diameter of filler opening 6 or oil outlet 7 corresponding positions; The valve rod 2 of these both sides, position is respectively established a groove 9 (only illustrating with a groove among the figure); Groove 9 is an arc round angle with the excessive angle of valve rod 2, is provided with spring 10, ball sealer 11 and push rod 12 successively at filler opening 6 or oil outlet 7 places, and push rod 12 diameters are less than the diameter of corresponding filler opening pipeline or oil outlet pipeline; Spring 10 1 ends are fixed on the end away from valve rod 2; Push rod 12 withstands valve rod 2, and ball sealer 11 blocks filler opening or oil outlet during state of equilibrium, makes valve seal.
This pressure pilot valve can be realized high pressure action and low pressure action, its working principle under the brief description:
High pressure turn-offs: set operating range (state of equilibrium) in addition when the oily pressure of control is increased to suddenly, the stroke spring of pressure pilot valve is owing to the effect compression of valve rod, and valve rod moves upward; When the groove above the valve rod moves to the position with filler opening or oil outlet level; Push rod slides under the effect of spring in this groove, valve rod stop motion this moment, ball sealer and filler opening or oil outlet depressurization; Filler opening and oil outlet are communicated with, valve open.
When the pressure pilot valve is control executing mechanism (valve) shutoff; The oil outlet of actuator is through the filler opening of oil circuit connection pressure pilot valve, and the oil outlet of pressure pilot valve connects the hydraulic pressure oil tank through oil circuit, and the hydraulic oil after the pressure pilot valve is opened in the execution architecture is back to the hydraulic pressure oil tank through the oil circuit of this connection; Because running off, hydraulic oil cause hydraulic pressure to reduce in the actuator; Actuator's inner spring action drives the action of shut-off valve valve rod, accomplishes the shutoff of pipeline at the appointed time.
Low pressure is turn-offed: set beyond the operating range (for example downstream line blast) when the oily pressure of control is reduced to suddenly, valve rod moves downward under the effect of stroke spring, when the groove below the valve rod moves to filler opening or oil outlet horizontal position; Push rod slides in this groove under the effect of spring; Valve rod stop motion this moment, ball sealer and filler opening or oil outlet depressurization, filler opening and oil outlet are communicated with; Valve open; Hydraulic oil in the execution architecture is back to the hydraulic pressure oil tank through the loop, causes hydraulic pressure to reduce because hydraulic oil runs off in the actuator, actuator's inner spring action; Drive the action of shut-off valve valve rod, accomplish the shutoff of pipeline at the appointed time.
Therefore; The all openable purpose of valve when the utility model pressure pilot valve can realize that a valve just can be realized high-pressure and low-pressure; On commercial Application,, then can use such valve just can realize if will realize that high-pressure and low-pressure all needs valve events; Existing technology need be installed two valves and saved installation and maintenance cost relatively, and has simplified mounting process.
Embodiment 2:
Different with embodiment 1 is that said valve rod 2 is thin for two ends; The bar that intermediate section is thick, the diameter of the part that valve rod 2 is thin is less than the internal diameter of axial bore, and the diameter of thick part equals the internal diameter of axial bore; When pressure balance, the part that valve rod is thick gets lodged in filler opening 6 or oil outlet 7 places.Thin bar above the pressure of control oil changes when valve rod is moved or below the thin rod part branch be positioned at horizontal position with filler opening and oil outlet, ball sealer 11 and filler opening 6 or oil outlet 7 depressurizations make filler opening 6 and oil outlet 7 connections, valve open.Embodiment 1 needs the accurate Calculation range difference of two grooves and equinoctial point up and down; Otherwise the excessive or too small groove location of crossing arrives the thicker position of valve rod owing to pressure probably; Thereby valve can not be opened; And then actuator just can not move yet, and will bring huge disaster or loss if be used on the large industry equipment, and therefore this mode requires than higher.And present embodiment processes one section thick bar on thin bar; As long as pressure can guarantee that thicker on the valve rod one section is slightly driven into hydraulic fluid port or oil outlet; Even if also can continuing mobile valve, also can open valve rod; Avoided the above-mentioned problem that groove can not be opened valve that is provided with, this mode is also low to the requirement of processing technology, more easily processing.
Certainly; So long as one section part that equates with the axial bore internal diameter is arranged on the valve rod; And the part littler than axial bore internal diameter respectively arranged in this section both sides, and the excessive angle of the little part of the big part of diameter and diameter is that the stem structure of an arc round angle is all in the protection domain of the utility model.
As the preferred version of such scheme, said stroke spring 8 is a dish formula spring.
The foregoing description all is located at oil outlet with spring, ball sealer and push rod and tells about, and this structure also can be located at filler opening.
The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (4)
1. a pressure pilot valve comprises pedestal, valve rod, filler opening, oil outlet and the momental stroke spring of control valve rod, and pedestal is provided with axial bore; Said valve rod be located in this axial bore and with the pedestal Spielpassung, filler opening and oil outlet are opened on the pedestal, it is characterized in that; When pressure balance; The diameter of said valve rod and filler opening or oil outlet corresponding position equals the internal diameter of axial bore, and the diameter of the valve rod of these both sides, position is less than the internal diameter of axial bore, and the excessive angle between said valve rod enlarged diameter section and the reduced diameter section is an arc round angle; Be provided with spring, ball sealer and push rod successively at filler opening or oil outlet place; Rod diameter is less than the diameter of corresponding filler opening pipeline or oil outlet pipeline, and spring one end is fixed on the end away from valve rod, and push rod withstands valve rod.
2. pressure pilot valve according to claim 1 is characterized in that: when pressure balance, a groove is respectively established in the both sides of valve rod and filler opening or oil outlet corresponding position.
3. pressure pilot valve according to claim 1; It is characterized in that: said valve rod is that two ends are thin; The bar that intermediate section is thick, the diameter of the part that valve rod is thin are less than the internal diameter of axial bore, and the diameter of thick part equals the internal diameter of axial bore; When pressure balance, the part that valve rod is thick gets lodged in filler opening or oil outlet place.
4. according to each described pressure pilot valve among the claim 1-3, it is characterized in that: said stroke spring is a dish formula spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200994901U CN202469169U (en) | 2012-03-16 | 2012-03-16 | Pressure pilot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200994901U CN202469169U (en) | 2012-03-16 | 2012-03-16 | Pressure pilot valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202469169U true CN202469169U (en) | 2012-10-03 |
Family
ID=46917328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200994901U Expired - Fee Related CN202469169U (en) | 2012-03-16 | 2012-03-16 | Pressure pilot valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202469169U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179349A (en) * | 2015-09-23 | 2015-12-23 | 中国煤炭科工集团太原研究院有限公司 | Automatic pressure switching selector valve |
-
2012
- 2012-03-16 CN CN2012200994901U patent/CN202469169U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179349A (en) * | 2015-09-23 | 2015-12-23 | 中国煤炭科工集团太原研究院有限公司 | Automatic pressure switching selector valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20160316 |