CN101907114A - Overload isolating valve - Google Patents
Overload isolating valve Download PDFInfo
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- CN101907114A CN101907114A CN 200910052429 CN200910052429A CN101907114A CN 101907114 A CN101907114 A CN 101907114A CN 200910052429 CN200910052429 CN 200910052429 CN 200910052429 A CN200910052429 A CN 200910052429A CN 101907114 A CN101907114 A CN 101907114A
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- valve seat
- valve
- hole
- spool
- overload
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Abstract
The invention relates to an overload isolating valve which comprises a valve body, wherein a main hole, a pressure measuring port (M) and an oil drainage port (L) are arranged on the valve body; a pipe joint is in threaded connection with the left end of the main hole; a valve seat is arranged in the main hole of the valve body, and the valve seat is in threaded connection with the left end of the main hole; a control oil chamber is formed among the valve body, the valve seat and the pipe joint, and the control oil chamber is communicated with an oil inlet end; a radial oil outlet hole is arranged on the valve seat, and the radial oil outlet hole is communicated with the pressure measuring port (M); a valve core in the shape of a stepped shaft is arranged in the valve seat, an oil outlet chamber is formed between the valve core and the valve seat, and the oil outlet chamber is communicated with the pressure measuring port (M); a pressure regulating device is in threaded connection with the right end of the main hole, and the conical valve core of the pressure regulating device is pushed on the valve core; and the valve core moves to control the oil outlet chamber and the control oil chamber to be communicated or closed. The invention has the beneficial effects of simple structure and convenient installation and disassembly; the invention can be realized by generally machining without adopting casting blanks, thus the manufacturing cost is low; and the invention has wide pressure regulating range and can meet the requirements of instruments and meters of different measuring ranges.
Description
Technical field
The present invention relates to a kind of hydraulic element, relate in particular to a kind of overload isolating valve, this overload isolating valve is used to protect instrument and apparatus such as pressure gauge or sensor to cause damage because of instantaneous pressure is excessive.
Background technique
In hydraulic system, measuring this system pressure generally adopts instrument and apparatus such as pressure gauge or sensor directly to be connected in the system, its shortcoming is: in actual mechanical process, the situation that hydraulic system exists instantaneous pressure to increase suddenly is easy to cause the damage of instrument and apparatus like this.
In order to address this problem, some technician adopt valve groups are formed in a plurality of valves stacks, and when instantaneous pressure increases suddenly, when surpassing the setting pressure of valve group, this valve group is the direct off-load of the pressure of pressure tap, thereby plays the effect of protection instrument and apparatus.But the linkage structure of this valve group is comparatively complicated, and volume is bigger, is subjected to the restriction of mounting point easily, and versatility is not strong, and different instrument and apparatus need select for use different valve groups to arrange in pairs or groups.
Summary of the invention
In order to address the above problem, to the invention provides and a kind ofly be used to protect instrument and apparatus to cause the overload isolating valve of damage because of instantaneous pressure is excessive, the characteristics that this overload isolating valve has is simple and compact for structure, keying property is good, range of regulation is wide.
To achieve these goals, technological scheme of the present invention is as follows:
Overload isolating valve is characterized in that: comprise
One valve body is provided with axial main aperture in the valve body, the two ends of main aperture are provided with internal thread, and described valve body is provided with pressure tap (M), the drain tap (L) that communicates with main aperture;
One pipe joint, pipe joint are threaded in the left end of main aperture;
One valve seat, valve seat are arranged on main aperture inside, and valve seat is threaded formation control oil pocket between valve body, valve seat, the pipe joint with the main aperture left end; Be provided with the valve seat main aperture that is used to place spool in the valve seat; Valve seat is provided with radially oil outlet, this radially oil outlet communicate with pressure tap (M); Offer on the valve seat and be used to be communicated with control oil pocket and the through flow hole that goes out oil pocket;
One spool, spool are the multidiameter shaft shape, form one between spool and the valve seat and go out oil pocket, go out the radially oil outlet of oil pocket by described valve seat and communicate with pressure tap (M); The right-hand member of spool is provided with the first axial blind hole, first radial hole and second radial hole, and first radial hole is communicated with first blind hole and goes out oil pocket, and second radial hole is positioned at the right side of first radial hole, and is communicated with first blind hole;
One regulator, regulator are threaded in the right-hand member of main aperture, and regulator comprises adjustment sleeve, spring and poppet valve core, and adjustment sleeve is threaded in the valve body, place spring and poppet valve core in the adjustment sleeve, and the front end of poppet valve core withstands in first blind hole of spool.
Further, in the present invention, offer compensating groove on the described spool, spool can steadily be moved, be difficult for being stuck.
Further, in the present invention, described first place, aperture is provided with chamfering, and this chamfering is the oil sealing surface that cooperates with poppet valve core.When the front end of poppet valve core withstand on spool first in the time, can keep sealing state.
Further, in the present invention, the right-hand member of described valve seat offers the shoulder hole, and the aperture in this shoulder hole is greater than the aperture of valve seat main aperture.
Further, in the present invention, also offer the technology mouth of plug screw on the described valve body, the bottom surface of this technology mouth is provided with and controls the clear opening that oil pocket communicates, the oblique through hole that is communicated with the through flow hole of valve seat.
Further, in the present invention, described spool left side place offers second blind hole, the 3rd radial hole that spool left end cylndrical surface is provided with and second blind hole intersects, make the fluid that enters through second blind hole after shunting enter the control oil pocket.
Beneficial effect of the present invention is:
1, the present invention is simple in structure, and easy installation and removal need not to adopt spray, and general machining just can realize low cost of manufacture.
2, range of regulation of the present invention is wide, can satisfy the demand of different range instrument and apparatus.
3, the simple Connecting format of the present invention is not subjected to the restriction of mounting point.
Description of drawings
Describe the present invention in detail below in conjunction with the drawings and specific embodiments:
Fig. 1 is a cross-sectional view of the present invention;
Fig. 2 is the structural representation of valve seat of the present invention;
Fig. 3 is the structural representation of spool of the present invention;
View when Fig. 4 opens for the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Referring to Fig. 1, a kind of overload isolating valve comprises valve body 20, pipe joint 1, valve seat 4, spool 3, regulator.
Have axial main aperture in the middle of the valve body 20, the two ends of main aperture are provided with internal thread.Make shoulder at place, valve body 20 left sides and be used to place seal ring 2, prevent the leakage of fluid between valve body 20 and the pipe joint 1 and prevent that dust from entering.Place, valve body 20 right sides makes circlip groove, is convenient to the installation of back-up ring 8, and a small sircle hole is made in the circlip groove position on valve body 20, makes things convenient for the dismounting of back-up ring 8.Make pressure tap (M) 6 in the upper-end surface of valve body 20, the technology mouth 18 of drain tap (L) 14 and plug screw 17 is made in the lower end surface of valve body 20.
Pipe joint 1 is the multidiameter shaft form, makes the screw thread that is used to connect at its two ends, and an end is connected with valve body 20, and the other end links to each other with oil inlet pipe, and the middle outer-hexagonal form that adopts is convenient to installing/dismounting.Axially make a step hole 22 along pipe joint 1, macropore is to oil inlet end, and aperture is to spool 3.
Referring to Fig. 1 and 2, valve seat 4 is inserted in main aperture inside, and the outside thread at valve seat 4 left end places and valve body 20 left end screw-internal thread fit make valve seat spacing by location shoulder 5.Form a control oil pocket 21 between valve body 20, pipe joint 1 and valve seat 4 threes.Axially make stepped valve seat main aperture 41 along valve seat 4, be convenient to and the cooperating of spool 3.One group of radially oil outlet 46 is made in the intermediate portion of valve seat 4, and radially oil outlet 46 is corresponding with pressure tap (M) 6 for this, is convenient to fluid and flows out from pressure tap (M) 6.Shoulder hole 45 is made in valve seat 4 right sides, and it is enough big that want in shoulder hole 45, to guarantee that poppet valve core 7 has enough spaces to stretch into.For preventing the leakage of fluid, on the valve seat circular bead surface, make seal groove 43 and seal groove 44 respectively, all place back-up ring and seal ring in seal groove 43 and the seal groove 44.
In addition, the bottom surface of the technology mouth 18 of plug screw is made and is controlled clear opening 19 and the oblique through hole 16 that oil pocket communicates, and tiltedly through hole 16 is positioned at the right side of clear opening 19.On valve seat main aperture 41 inwalls, make a undercut groove 47, undercut groove 47 close radially oil outlets 46, the bottom land of undercut groove 47 is made a through flow hole 42 that runs through the valve seat radial wall, makes the fluid of control oil pocket can be through clear opening 19, tiltedly through hole 16, through flow hole 42 flow in the undercut groove 47 of valve seat.
Referring to Fig. 1 and 3, spool 3 is a multidiameter shaft form part, the spacing shoulder 30 of spool left end is corresponding with the locating shoulder 48 of valve seat, spool comprises first order multidiameter shaft 33, second level multidiameter shaft 34 and third level multidiameter shaft 35, first order multidiameter shaft 33 is positioned at the right side of spacing shoulder 30, third level multidiameter shaft 35 is positioned at the low order end of spool 3, first order multidiameter shaft 33 and third level multidiameter shaft 35 consistent size, and match with the valve seat inner wall of main hole, second level multidiameter shaft 34 is between first order multidiameter shaft 33 and third level multidiameter shaft 35, and the size of second level multidiameter shaft 34 is less than the size of the first order or third level multidiameter shaft, form one between second level multidiameter shaft 34 and the valve seat main aperture 41 and go out oil pocket 15, go out the radially oil outlet 46 of oil pocket 15 by valve seat and communicate with pressure tap (M) 6.The right-hand member of spool is made the first axial blind hole 38, first radial hole 39 and second radial hole, 37, the first radial holes 39 and is communicated with first blind hole 38 and goes out the right side that oil pocket 15, the second radial holes 37 are positioned at first radial hole 39, and is communicated with first blind hole 38.Place, aperture in first blind hole 38 makes chamfering 36, and this chamfering 36 is the oil sealing surfaces that cooperate with poppet valve core 7.When the front end of poppet valve core 7 withstands in the chamfering 36 of spool, can keep sealing state.Symmetry is made compensating groove 331 on the cylndrical surface of first order multidiameter shaft 33 and third level multidiameter shaft 35, and spool 3 is moved steadily, is difficult for being stuck.Make second blind hole 31 as filler opening at spool left side place, make the 3rd radial hole 32 and intersect with second blind hole 31 on the left end cylndrical surface, 31 back shuntings enter and control oil pocket 21 through second blind hole to make the fluid that enters.
Regulator is threaded in the right-hand member of main aperture, and this regulator comprises adjustment sleeve 10, nut 9, packing ring 11, spring seat 12, spring 13 and poppet valve core 7.
Along making an axial blind hole, be placed with poppet valve core 7, spring 13 and spring seat 12 at place, adjustment sleeve 10 left sides in this axial blind hole.Poppet valve core 7 is pressed on the spring, and the front end of poppet valve core 7 withstands in the chamfering 36 of spool, leak free sealing between the frustum face of poppet valve core 7 front ends and the spool 3, and poppet valve core 7 promotes spool 3 and moves to high order end position (being initial position) under the effect of spring force.
10 left end cylindrical places make screw thread at adjustment sleeve, are convenient to be threaded with valve body.The place makes a radial direction through hole 23 at screw thread right-hand member tool withdrawal groove, convenient discharge of leaking oil.On radial direction through hole 23 right circles cylinders, make seal groove, be used to place seal ring and back-up ring, prevent the outflow of inner fluid and entering of external dust.Back-up ring 8 is placed in the circlip groove, prevents adjustment sleeve 10 loosening escaping under high pressure and vibrations.It is conveniently to adorn different controlling device (handle or handwheel) that adjustment sleeve 10 right-hand member places make little outer-hexagonal.The flank of thread of adjustment sleeve 10 right-hand members cooperates with packing ring 11 and nut 9 respectively, can set different pressure by adjusting washer (disk) 11 and nut 9, to satisfy the demand of different instrument and apparatus.
Situation when overload isolating valve is closed (oil pressure of filler opening does not reach the predefined working pressure of spring):
As shown in Figure 1, when the step hole 22 of fluid from pipe joint enters, second blind hole 31, the 3rd radial hole 32 through spool enter control oil pocket 21, enter out oil pocket 15 through clear opening 19, oblique through hole 16, through flow hole 42, undercut groove 47 again, the radially oil outlet 46 of fluid on valve seat 4 flow to pressure tap (M) then.Because working pressure is less than the spring setting pressure, this moment, spool 3 still remained on initial position, and second radial hole 37 on the spool is obstructed with drain tap (L) 14, and drain tap (L) 14 no fluid flow out.
Situation (oil pressure of filler opening is greater than the predefined working pressure of spring) when overload isolating valve is opened:
After fluid enters from the step hole 22 of pipe joint; because working pressure is greater than the spring setting pressure; promote spool 3 toward moving to right; it is spacing to move to valve seat locating shoulder 48 backs until the spacing shoulder 30 of spool; at this moment; the first order multidiameter shaft 33 of spool is closed the undercut groove 47 of valve seat 4; second radial hole 37 on the spool 3 is communicated with the shoulder hole 45 on the valve seat 4; it is obstructed with control oil pocket 21 to go out oil pocket 15 this moment; the direct off-load of fluid of pressure tap (M) 6 is to drain tap (L) 14; the instrument and apparatus pressure of pressure tap (M) is descended, thereby played the purpose of protection instrument and apparatus.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in the foregoing description and the specification is principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the present invention.The protection domain that the present invention requires is defined by appending claims and equivalent thereof.
Claims (6)
1. overload isolating valve is characterized in that: comprise
One valve body is provided with axial main aperture in the valve body, the two ends of main aperture are provided with internal thread, and described valve body is provided with pressure tap (M), the drain tap (L) that communicates with main aperture;
One pipe joint, pipe joint are threaded in the left end of main aperture;
One valve seat, valve seat are arranged on main aperture inside, and valve seat is threaded formation control oil pocket between valve body, valve seat, the pipe joint with the main aperture left end; Be provided with the valve seat main aperture that is used to place spool in the valve seat; Valve seat is provided with radially oil outlet, this radially oil outlet communicate with pressure tap (M); Offer on the valve seat and be used to be communicated with control oil pocket and the through flow hole that goes out oil pocket;
One spool, spool are the multidiameter shaft shape, form one between spool and the valve seat and go out oil pocket, go out the radially oil outlet of oil pocket by described valve seat and communicate with pressure tap (M); The right-hand member of spool is provided with the first axial blind hole, first radial hole and second radial hole, and first radial hole is communicated with first blind hole and goes out oil pocket, and second radial hole is positioned at the right side of first radial hole, and is communicated with first blind hole;
One regulator, regulator are threaded in the right-hand member of main aperture, and regulator comprises adjustment sleeve, spring and poppet valve core, and adjustment sleeve is threaded in the valve body, place spring and poppet valve core in the adjustment sleeve, and the front end of poppet valve core withstands in first blind hole of spool.
2. overload isolating valve according to claim 1 is characterized in that, offers compensating groove on the described spool.
3. overload isolating valve according to claim 1 is characterized in that, the place, aperture of described first blind hole is provided with chamfering.
4. overload isolating valve according to claim 1 is characterized in that the right-hand member of described valve seat offers the shoulder hole, and the aperture in this shoulder hole is greater than the aperture of valve seat main aperture.
5. overload isolating valve according to claim 1 is characterized in that, also offers the technology mouth of plug screw on the described valve body, and the bottom surface of this technology mouth is provided with and controls the clear opening that oil pocket communicates, the oblique through hole that is communicated with the through flow hole of valve seat.
6. overload isolating valve according to claim 1 is characterized in that, place, described spool left side offers second blind hole, and spool left end cylndrical surface is provided with the 3rd radial hole that intersects with second blind hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910052429 CN101907114B (en) | 2009-06-03 | 2009-06-03 | Overload isolating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910052429 CN101907114B (en) | 2009-06-03 | 2009-06-03 | Overload isolating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101907114A true CN101907114A (en) | 2010-12-08 |
| CN101907114B CN101907114B (en) | 2013-01-02 |
Family
ID=43262661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910052429 Expired - Fee Related CN101907114B (en) | 2009-06-03 | 2009-06-03 | Overload isolating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101907114B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503042A (en) * | 2020-09-14 | 2021-03-16 | 宁波华液机器制造有限公司 | Pilot valve structure and proportional pressure reducing valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2528517B1 (en) * | 1982-06-09 | 1986-02-21 | Sfr Sa Robinetterie | SHUTTER FOR MOUNTING IN A BODY |
| CN2141481Y (en) * | 1992-12-05 | 1993-09-01 | 广州第二机械制造厂 | Controllable stop valve |
| CN201407246Y (en) * | 2009-06-03 | 2010-02-17 | 上海立新液压有限公司 | Overload closing valve |
-
2009
- 2009-06-03 CN CN 200910052429 patent/CN101907114B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503042A (en) * | 2020-09-14 | 2021-03-16 | 宁波华液机器制造有限公司 | Pilot valve structure and proportional pressure reducing valve |
| CN112503042B (en) * | 2020-09-14 | 2022-09-27 | 宁波华液机器制造有限公司 | Pilot valve structure and proportional pressure reducing valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101907114B (en) | 2013-01-02 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20160603 |
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| CF01 | Termination of patent right due to non-payment of annual fee |