CN203694336U - Breathing machine overload safety valve with dual protection function - Google Patents
Breathing machine overload safety valve with dual protection function Download PDFInfo
- Publication number
- CN203694336U CN203694336U CN201320819537.1U CN201320819537U CN203694336U CN 203694336 U CN203694336 U CN 203694336U CN 201320819537 U CN201320819537 U CN 201320819537U CN 203694336 U CN203694336 U CN 203694336U
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- CN
- China
- Prior art keywords
- valve seat
- relief valve
- blood pressure
- screw mandrel
- poppet valve
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Abstract
The utility model discloses a breathing machine overload safety valve with a dual protection function, and relates to the technical field of engineering machines. A valve base passes through the front end of a connecting sleeve; a lifting valve base is arranged at the back end of the connecting sleeve; a large reset spring sleeves the outer side of a column body on the front part of the lifting valve base, and sleeves the outer side of back edge of the valve base; a main valve core is arranged on the inner side of the middle front part of the valve base; a safety valve core is arranged inside the lifting valve base; a small reset spring is arranged between the upper surface of the column body on the front part of the lifting valve base and the bottom of a mandrel; a sliding chute is formed from the upper surface of a pressure-adjusting lead screw to the middle part of the pressure-adjusting lead screw; the outer side of the safety valve core is sleeved with a pressure-adjusting spring. By adopting the breathing machine overload safety valve, the problems of great economic loss and safety accidents caused by damages to controlled components due to low overflow speed or incapability of working during working of the overload safety valve in the prior art are solved. The overload safety valve is simple in structure and convenient to use, can overflow rapidly, and has the dual protection function.
Description
Technical field
This utility model relates to technical field of engineering machinery, particularly relates 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, is conventionally used in combination with electromagnetic distributing valve, can be used for controlling the break-make of breathing according to exporting.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 in the time reaching set pressure, to keep steady state.Wherein be called overload relief valve with the overflow valve of what overload protection.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 in the time 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 uses and brings certain hidden danger to user.
Utility model content
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.It is a kind of simple in structure, easy to use that this utility model provides, fast overflow have the overload relief valve of double protection functions.
In order to achieve the above object, technical solution adopted in the utility model is:
There is an overload relief valve for double protection functions, comprise 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 composition, 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,
Offer the spaced through hole of a circle in the front portion of valve seat, be provided with main valve plug in valve seat middle front part inner side, described core bar extends to valve seat upper surface outside through main valve plug inside, described core bar center offered oil hole, be provided with relief valve spool in poppet valve seat inside, 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, offer chute from the upper surface of adjust blood pressure screw mandrel to adjust blood pressure screw mandrel middle part, 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 beneficial effects of the utility model are: this utility model overload relief valve is in when work, and 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 this utility model overload relief valve 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 utlity model has double protection functions;
Fig. 2 is this utility model valve seat construction schematic diagram;
Fig. 3 is this utility model main valve plug structural representation;
Fig. 4 is this utility model core bar structure schematic diagram;
Fig. 5 is this utility model poppet valve holder structure schematic diagram;
Fig. 6 is this utility model relief valve valve core structure schematic diagram;
Fig. 7 is this utility model coupling sleeve structural representation;
Fig. 8 is this utility model adjust blood pressure screw structure schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model will be further described.
As shown in the figure; there is an overload relief valve for double protection functions, comprise 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 made up 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.Pass and have valve seat 1 at the front end of coupling sleeve 12, 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 of poppet valve seat 86, and when movement, large back-moving spring 11 is understood compacted or unclamps.When 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 entirety are set in forward cylinder 6, like this in the time that 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.
Offer the spaced through hole 23 of a circle in the front portion of valve seat 1, amount to 8, and the spacing of adjacent two through holes 23 equates.Be provided with main valve plug 2 in valve seat 1 middle front part inner side, core bar 3 extends to valve seat 1 upper surface outside through main valve plug 2 inside, offered oil hole 18 at core bar 3 centers, be provided with relief valve spool 9 in poppet valve seat 8 inside, 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, when 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, offer chute 20 from the upper surface of adjust blood pressure screw mandrel 14 to adjust blood pressure screw mandrel 14 middle parts, relief valve spool 9 can extend into chute 20 inside and move around, be arranged with pressure spring 10 in the outside of relief valve spool 9, the upper surface of adjust blood pressure screw mandrel 14 is withstood in the bottom of pressure spring 10, have locking nut 15 in adjust blood pressure screw mandrel 14 arranged outside, locking nut 15 is used for adjust blood pressure screw mandrel 14 and poppet valve seat 8 to lock.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.
When 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, distributing valve continues to send oil to valve pocket 1, relief valve spool 9 is subject to the chute 20 interior motion of oil pressure pressure to 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 move to poppet valve seat 8, and drives main valve plug 2 to move to poppet valve seat 8 valve seat 1 is interior yet, and pushes little back-moving spring 7.In the time that 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, and entirety is 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 utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; this utility model is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present utility model; do not departing under the prerequisite of this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed this utility model.The claimed scope of this utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. there is an overload relief valve for double protection functions, comprise 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 composition, 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,
Offer the spaced through hole of a circle in the front portion of valve seat, be provided with main valve plug in valve seat middle front part inner side, described core bar extends to valve seat upper surface outside through main valve plug inside, described core bar center offered oil hole, be provided with relief valve spool in poppet valve seat inside, 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, offer chute from the upper surface of adjust blood pressure screw mandrel to adjust blood pressure screw mandrel middle part, 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 |
|---|---|---|---|
| CN201320819537.1U CN203694336U (en) | 2013-12-13 | 2013-12-13 | Breathing machine overload safety valve with dual protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320819537.1U CN203694336U (en) | 2013-12-13 | 2013-12-13 | Breathing machine overload safety valve with dual protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203694336U true CN203694336U (en) | 2014-07-09 |
Family
ID=51044842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320819537.1U Expired - Fee Related CN203694336U (en) | 2013-12-13 | 2013-12-13 | Breathing machine overload safety valve with dual protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203694336U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103721335A (en) * | 2013-12-13 | 2014-04-16 | 科迈（常州）电子有限公司 | Breathing machine overload relief valve with dual-protection function |
| CN104455597A (en) * | 2014-12-16 | 2015-03-25 | 中煤科工集团西安研究院有限公司 | Overshoot-limited fixed-value safety valve |
-
2013
- 2013-12-13 CN CN201320819537.1U patent/CN203694336U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103721335A (en) * | 2013-12-13 | 2014-04-16 | 科迈（常州）电子有限公司 | Breathing machine overload relief valve with dual-protection function |
| CN104455597A (en) * | 2014-12-16 | 2015-03-25 | 中煤科工集团西安研究院有限公司 | Overshoot-limited fixed-value safety 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 |
Granted publication date: 20140709 Termination date: 20141213 |
|
| EXPY | Termination of patent right or utility model |