CN103721335A - Breathing machine overload relief valve with dual-protection function - Google Patents
Breathing machine overload relief valve with dual-protection function Download PDFInfo
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- CN103721335A CN103721335A CN201310677896.2A CN201310677896A CN103721335A CN 103721335 A CN103721335 A CN 103721335A CN 201310677896 A CN201310677896 A CN 201310677896A CN 103721335 A CN103721335 A CN 103721335A
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- valve seat
- relief valve
- poppet valve
- poppet
- overload relief
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- 230000029058 respiratory gaseous exchange Effects 0.000 title abstract description 5
- 230000036772 blood pressure Effects 0.000 claims description 24
- 230000008878 coupling Effects 0.000 claims description 16
- 238000010168 coupling process Methods 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 230000033001 locomotion Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention discloses a breathing machine overload relief valve with the dual-protection function, and relates to the technical field of engineering machinery. A valve seat is arranged at the front end of a connecting sleeve in a penetrated mode, a poppet valve seat is arranged at the rear end of the connecting sleeve, a column on the front portion of the poppet valve seat is sleeved with a large reset spring, the large reset spring is arranged on the outer side of the edge of the rear portion of the valve seat in a sleeved mode, a main valve element is arranged on the inner side of the front middle portion of the valve seat, a relief valve element is arranged inside the poppet valve seat, a small reset spring is arranged between the upper surface of the column of the front portion of the poppet valve seat and the bottom of an element rod, a sliding groove is formed from the upper surface to the middle of a pressure adjustment lead screw, and the relief valve element is sleeved with a pressure adjustment spring. According to the breathing machine overload relief valve, the problems that when an overload relief valve in the prior art works, controlled parts are damaged due to the low overflowing speed or work failing, and serious economic losses and safety accidents are caused are solved, and the breathing machine overload relief valve is simple in structure, convenient to use and capable of carrying out rapid overflowing, and has the dual-protection function.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly relate to a kind of overload relief valve with double protection functions.
Background technology
Hydraulic valve is a kind of Automation Elements with pressure oil operation, and it is subject to the control of distributing valve pressure oil, and common and electromagnetic distributing valve is used in combination, and can be used for controlling the break-make of breathing according to outlet.What be wherein used for controlled pressure is called again pressure-control valve, and the overflow valve in pressure-control valve is can control hydraulic system when reaching set pressure, to keep steady state.Wherein with the overflow valve of what overload protection, be called overload relief valve.When system breaks down, when pressure is elevated to the limit value that may damage, the valve port of overload relief valve can be opened and overflow, to guarantee the safety of system.Overload relief valve major function is reached and is reduced by control assembly (as mechanical arm) pressure by overflow exactly, it is under pressure and is no more than maximum load, and it is effectively protected.But current overload relief valve is when being reached load critical line by control assembly, flooding velocity is slower, cannot reach the object of quick overflow, may cause by the damage of control assembly, has brought larger economic loss.Overload relief valve is long-time simultaneously uses rear inside aging, and valve port can not be opened in use, can not realize defencive function, thereby causes by the damage of control assembly, and security incident very easily occurs, and to user, uses and brings certain hidden danger.
Summary of the invention
When solving in prior art overload relief valve work, flooding velocity maybe cannot be worked slowly, causes being damaged by control assembly, has brought larger economic loss and the problem of security incident occurs.The invention provides a kind of simple in structure, easy to use, overflow there is the overload relief valve of double protection functions fast.
In order to achieve the above object, the technical solution used in the present invention is:
An overload relief valve with double protection functions, comprises coupling sleeve, valve seat, main valve plug, adjust blood pressure screw mandrel, pressure spring, it is characterized in that:
Also comprise core bar, poppet valve seat, little back-moving spring, large back-moving spring, relief valve spool, described coupling sleeve is hollow cylinder, described poppet valve seat is by rear portion nut, middle part external thread column and forward cylinder form, the front end of coupling sleeve is through there being valve seat, the rear end female thread of coupling sleeve matches fixing with poppet valve seat middle part external thread column, described poppet valve seat rear portion nut props up coupling sleeve bottom surface, sheathed large back-moving spring outside poppet valve seat forward cylinder, the rear part edge inner side of described valve seat is socketed in poppet valve seat forward cylinder, and large reseting spring sleeve is set in valve seat rear part edge outside,
In the front portion of valve seat, offer the spaced through hole of a circle, in valve seat middle front part inner side, be provided with main valve plug, described core bar extends to valve seat upper surface outside through main valve plug inside, described core bar center offered oil hole, in poppet valve seat inside, be provided with relief valve spool, and relief valve spool contacts with core bar via bottoms opening through poppet valve seat upper surface, between poppet valve seat forward cylinder upper surface and core bar bottom, be provided with little back-moving spring;
Anterior outside at adjust blood pressure screw mandrel is provided with a circle external screw thread, adjust blood pressure screw mandrel matches fixing by external screw thread with poppet valve seat rear portion nut, from the upper surface of adjust blood pressure screw mandrel, to adjust blood pressure screw mandrel middle part, offer chute, described relief valve spool can extend into chute inside, outside at relief valve spool is arranged with pressure spring, and adjust blood pressure screw mandrel upper surface is withstood in the bottom of pressure spring.
Aforesaid a kind of overload relief valve with double protection functions, is characterized in that: described rear portion nut diameter is greater than middle part external thread column diameter, and described middle part external thread column diameter is greater than forward cylinder diameter.
Aforesaid a kind of overload relief valve with double protection functions, is characterized in that: the front portion of described valve seat offers 8 spaced through holes, and adjacent two through-hole spacings equate.
Aforesaid a kind of overload relief valve with double protection functions, is characterized in that: described adjust blood pressure screw mandrel arranged outside has locking nut.
Aforesaid a kind of overload relief valve with double protection functions, is characterized in that: described relief valve spool top is tip-like top, and core bar via bottoms opening is withstood at relief valve spool tip-like top.
Aforesaid a kind of overload relief valve with double protection functions, is characterized in that: in poppet valve seat forward cylinder, offer the spaced through hole of a circle.
The invention has the beneficial effects as follows: overload relief valve of the present invention is in when work, first, by the moving downward of main valve plug, the through hole of offering by the front portion of valve seat carries out overflow protection, if flooding velocity still can not meet the demands.At this moment also motion thereupon of valve seat, is separated and further improves flooding velocity with distributing valve valve body.By double protection, accelerate the flooding velocity of overload relief valve like this, can realize preferably by the protection of control assembly, reduced the probability of its damage.Duplicate protection has also avoided general overload relief valve defencive function single simultaneously; if damage the function that can not realize overflow; one of them overflow portion of overload relief valve of the present invention can not be worked, and can also use another part to carry out overflow protection, Use of respirator better effects if.
Accompanying drawing explanation
Fig. 1 is the overload relief valve structural representation that the present invention has double protection functions;
Fig. 2 is valve seat construction schematic diagram of the present invention;
Fig. 3 is main valve plug structural representation of the present invention;
Fig. 4 is core bar structure schematic diagram of the present invention;
Fig. 5 is poppet valve holder structure schematic diagram of the present invention;
Fig. 6 is relief valve valve core structure schematic diagram of the present invention;
Fig. 7 is coupling sleeve structural representation of the present invention;
Fig. 8 is adjust blood pressure screw structure schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in the figure; an overload relief valve with double protection functions, comprises valve seat 1, main valve plug 2, core bar 3, little back-moving spring 7, poppet valve seat 8, relief valve spool 9, pressure spring 10, large back-moving spring 11, coupling sleeve 12, adjust blood pressure screw mandrel 14, locking nut 15.Coupling sleeve 12 is a hollow cylinder, and poppet valve seat is comprised of 8 rear portion nuts 4, middle part external thread column 5 and forward cylinder 6, and nut 4 diameters in rear portion are greater than middle part external thread column 5 diameters, and external thread column 5 diameters in middle part are greater than forward cylinder 6 diameters.At the front end of coupling sleeve 12, through there being valve seat 1, the female thread 13 of coupling sleeve 12 rear ends matches both is fixed with poppet valve seat 8 middle part external thread columns 6.After fixing, poppet valve seat 8 rear portion nuts 4 prop up the lower surface of coupling sleeve 12.At the poppet valve seat 8 forward cylinder 6 sheathed large back-moving springs 11 in outside, rear part edge 24 inner sides of valve seat 1 are socketed in poppet valve seat 8 forward cylinder 6, and large back-moving spring 11 is set in valve seat 1 rear part edge 24 outsides.Valve seat 1 can move around in the forward cylinder 6 of poppet valve seat 8, and during movement, large back-moving spring 11 is understood compacted or unclamps.During design, large back-moving spring 11 one end are against on the external thread column 5 of middle part, the other end is set on valve seat 1, and large back-moving spring 11 integral body are set in forward cylinder 6, like this when work is used, large back-moving spring 11 control accuracies are higher, there will not be the situation of eccentric torsional deformation to occur, and result of use is better.
In the front portion of valve seat 1, offer the spaced through hole 23 of a circle, amount to 8, and the spacing of adjacent two through holes 23 equates.In valve seat 1 middle front part inner side, be provided with main valve plug 2, core bar 3 extends to valve seat 1 upper surface outside through main valve plug 2 inside, at core bar 3 centers, offered oil hole 18, in poppet valve seat 8 inside, be provided with relief valve spool 9, relief valve spool 9 tops are tip-like top 21, and the bottom opening 19 of core bar 3 through holes 18 is withstood at relief valve spool 9 tip-like tops 21.Upper surface in poppet valve seat 8 forward cylinder 6 is provided with boss 16, core bar 3 bottoms are cylindrical base 17, one end of little back-moving spring 7 is set in the outside of boss 16, the other end is set in the outside of cylindrical base 17, so little back-moving spring 7 is accurately installed, during use, little back-moving spring 7 can torsional deformation, and result of use is better.
Anterior outside at adjust blood pressure screw mandrel 14 is provided with a circle external screw thread 22, adjust blood pressure screw mandrel 14 matches fixing by external screw thread 22 with the female thread of poppet valve seat 8 rear portion nuts 4, from the upper surface of adjust blood pressure screw mandrel 14, to adjust blood pressure screw mandrel 14 middle parts, offer chute 20, relief valve spool 9 can extend into chute 20 inside and move around, in the outside of relief valve spool 9, be arranged with pressure spring 10, the upper surface of adjust blood pressure screw mandrel 14 is withstood in the bottom of pressure spring 10, in adjust blood pressure screw mandrel 14 arranged outside, have locking nut 15, locking nut 15 is used for adjust blood pressure screw mandrel 14 and 8 lockings of poppet valve seat.In order to make to have the overload relief valve overflow better effects if of double protection functions, in poppet valve seat 8 forward cylinder 6, offer the spaced through hole 25 of a circle, amount to 4, and the spacing of adjacent two through holes 25 equates.
During work, distributing valve is conveyed into oil in valve pocket 1 from the through hole 18 at core bar 3 centers, and allows and be full of oil in valve pocket 1 and keep balance.When cannot be born the load that oil pressure brings by control assembly time, distributing valve continues to send oil to valve pocket 1, relief valve spool 9 is subject to oil pressure pressure to the interior motion of chute 20 of adjust blood pressure screw mandrel 14, and oil will enter in poppet valve seat 8 like this, and overflows from the through hole 25 of poppet valve seat 8.Simultaneously relief valve spool 9 just can not withstand core bar 3 bottoms again to the interior motion of chute 20, and core bar 3 can be to 8 motions of poppet valve seat, and drives main valve plug 2 to poppet valve seat 8, to move valve seat 1 is interior yet, and pushes little back-moving spring 7.When main valve plug 2 exposes the through hole on valve seat 1 23, oil just overflows fast from 8 through holes 23.If now flooding velocity still can not meet the demands, valve seat 1 also can be subject to oil pressure, whole to poppet valve seat 8 rear motions and push large back-moving spring 11, just like this valve seat 1 can with the distributing valve valve body oil guard that is separated out, improve rapidly flooding velocity.After work completes, the deformation power that valve seat 1 is subject to large back-moving spring 11 moves reset, the deformation power that main valve plug 2 is subject to little back-moving spring 7 moves reset, and pressure spring 10 deformation drive relief valve spool 9 again to eject reset, and relief valve spool 9 also will withstand the bottom of core bar 3, and core bar 3 is ejected to the upper surface outside of valve seat 1.
Show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1. an overload relief valve with double protection functions, comprises coupling sleeve, valve seat, main valve plug, adjust blood pressure screw mandrel, pressure spring, it is characterized in that:
Also comprise core bar, poppet valve seat, little back-moving spring, large back-moving spring, relief valve spool, described coupling sleeve is hollow cylinder, described poppet valve seat is by rear portion nut, middle part external thread column and forward cylinder form, the front end of coupling sleeve is through there being valve seat, the rear end female thread of coupling sleeve matches fixing with poppet valve seat middle part external thread column, described poppet valve seat rear portion nut props up coupling sleeve bottom surface, sheathed large back-moving spring outside poppet valve seat forward cylinder, the rear part edge inner side of described valve seat is socketed in poppet valve seat forward cylinder, and large reseting spring sleeve is set in valve seat rear part edge outside,
In the front portion of valve seat, offer the spaced through hole of a circle, in valve seat middle front part inner side, be provided with main valve plug, described core bar extends to valve seat upper surface outside through main valve plug inside, described core bar center offered oil hole, in poppet valve seat inside, be provided with relief valve spool, and relief valve spool contacts with core bar via bottoms opening through poppet valve seat upper surface, between poppet valve seat forward cylinder upper surface and core bar bottom, be provided with little back-moving spring;
Anterior outside at adjust blood pressure screw mandrel is provided with a circle external screw thread, adjust blood pressure screw mandrel matches fixing by external screw thread with poppet valve seat rear portion nut, from the upper surface of adjust blood pressure screw mandrel, to adjust blood pressure screw mandrel middle part, offer chute, described relief valve spool can extend into chute inside, outside at relief valve spool is arranged with pressure spring, and adjust blood pressure screw mandrel upper surface is withstood in the bottom of pressure spring.
2. a kind of overload relief valve with double protection functions according to claim 1, is characterized in that: described rear portion nut diameter is greater than middle part external thread column diameter, and described middle part external thread column diameter is greater than forward cylinder diameter.
3. a kind of overload relief valve with double protection functions according to claim 2, is characterized in that: the front portion of described valve seat offers 8 spaced through holes, and adjacent two through-hole spacings equate.
4. a kind of overload relief valve with double protection functions according to claim 3, is characterized in that: described adjust blood pressure screw mandrel arranged outside has locking nut.
5. a kind of overload relief valve with double protection functions according to claim 4, is characterized in that: described relief valve spool top is tip-like top, and core bar via bottoms opening is withstood at relief valve spool tip-like top.
6. according to a kind of overload relief valve with double protection functions claimed in claim 5, it is characterized in that: in poppet valve seat forward cylinder, offer the spaced through hole of a circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310677896.2A CN103721335A (en) | 2013-12-13 | 2013-12-13 | Breathing machine overload relief valve with dual-protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310677896.2A CN103721335A (en) | 2013-12-13 | 2013-12-13 | Breathing machine overload relief valve with dual-protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103721335A true CN103721335A (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310677896.2A Pending CN103721335A (en) | 2013-12-13 | 2013-12-13 | Breathing machine overload relief valve with dual-protection function |
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| Country | Link |
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| CN (1) | CN103721335A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237620A (en) * | 2019-11-05 | 2020-06-05 | 新乡航空工业(集团)有限公司 | Valve structure integrating pressure regulating valve and safety valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH051702A (en) * | 1991-06-25 | 1993-01-08 | Hitachi Constr Mach Co Ltd | Pressure control valve |
| JPH0875020A (en) * | 1994-09-08 | 1996-03-19 | Hitachi Constr Mach Co Ltd | Pressure control valve |
| JPH1113913A (en) * | 1997-06-20 | 1999-01-22 | Hitachi Constr Mach Co Ltd | Balance piston type relief valve |
| WO2007080373A1 (en) * | 2006-01-07 | 2007-07-19 | Shane Richard Wootton | Apparatus and method for injecting a liquid chemical reagent into a mixing chamber |
| CN203694336U (en) * | 2013-12-13 | 2014-07-09 | 科迈（常州）电子有限公司 | Breathing machine overload safety valve with dual protection function |
-
2013
- 2013-12-13 CN CN201310677896.2A patent/CN103721335A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH051702A (en) * | 1991-06-25 | 1993-01-08 | Hitachi Constr Mach Co Ltd | Pressure control valve |
| JPH0875020A (en) * | 1994-09-08 | 1996-03-19 | Hitachi Constr Mach Co Ltd | Pressure control valve |
| JPH1113913A (en) * | 1997-06-20 | 1999-01-22 | Hitachi Constr Mach Co Ltd | Balance piston type relief valve |
| WO2007080373A1 (en) * | 2006-01-07 | 2007-07-19 | Shane Richard Wootton | Apparatus and method for injecting a liquid chemical reagent into a mixing chamber |
| CN203694336U (en) * | 2013-12-13 | 2014-07-09 | 科迈（常州）电子有限公司 | Breathing machine overload safety valve with dual protection function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237620A (en) * | 2019-11-05 | 2020-06-05 | 新乡航空工业(集团)有限公司 | Valve structure integrating pressure regulating valve and safety valve |
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Application publication date: 20140416 |