CN203176467U - Direct-acting type overflow valve - Google Patents
Direct-acting type overflow valve Download PDFInfo
- Publication number
- CN203176467U CN203176467U CN 201320172709 CN201320172709U CN203176467U CN 203176467 U CN203176467 U CN 203176467U CN 201320172709 CN201320172709 CN 201320172709 CN 201320172709 U CN201320172709 U CN 201320172709U CN 203176467 U CN203176467 U CN 203176467U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- fixed cover
- spool
- setting sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a direct-acting type overflow valve, which comprises a valve body, a positioning sleeve, a valve core and a fixing sleeve, wherein the left port of a valve hole in the valve body is provided with the positioning sleeve, the left side of the positioning sleeve is provided with a left retaining plate, the left retaining plate is connected with the valve body through a bolt, the positioning sleeve is limited by a shoulder and the valve body, the right port of the valve hole in the valve body is provided with the fixing sleeve, the right side of the fixing sleeve is provided with a right retaining plate, the right retaining plate is connected with the valve body through a bolt, the fixing sleeve is limited by a shoulder and the valve body, the interior of the valve hole in the valve body is provided with the valve core, the valve core comprises a first cylinder, a first round rod, a second cylinder and a second round rod, the first cylinder, the first round rod, the second cylinder and the second round rod are sequentially fixed, the left end of the valve core is positioned in a hole of the positioning sleeve, the second round rod is provided with a spring, the two ends of the spring are respectively jacked against the second cylinder and an adjusting gasket, the adjusting gasket is arranged at the end surface of the inner hole in the fixing sleeve, the interior of the valve body is provided with a first oil passage, a second oil passage and an adjusting oil passage, and the first oil passage, the second oil passage and the adjusting oil passage are communicated with the valve hole. The direct-acting type overflow valve has the advantages that the structure of a slide valve of the overflow valve is simplified, the safety and the practically are realized, and the efficiency is high.
Description
Technical field
The utility model belongs to the relief valve field that construction machinery hydraulic system adopts, particularly a kind of straight moving relief valve.
Background technique
Pressure setting, safety protection, off-load in the existing metering pump hydraulic control system is to rely on relief valve to be achieved.And the straight ejector half relief valve that generally adopts at present, since the structures shape that the spring force that acts on guiding valve upper end directly balances each other with the hydraulic coupling of guiding valve piston base sliding valve structure complexity, processing difficulties, manufacture cost is higher, particularly has the lower shortcoming of pressure sensitivity of valve control.
The model utility content
The utility model provides a kind of straight moving relief valve at above-mentioned problem, and the Rational structure that adopts self difference in areas of spool to produce the thrust of surging addresses the above problem, and practicality and high efficiency.
The technological scheme that adopts is:
A kind of straight moving relief valve comprises valve body, setting sleeve, spool and fixed cover.
Its technological points is:
Be provided with setting sleeve in the valve body valve opening left port, setting sleeve left side is provided with by a plurality of first bolts and is connected right baffle-plate on the valve body, and setting sleeve is provided with the setting sleeve shoulder that matches with valve body left side circular groove.
Be provided with fixed cover in the valve body valve opening right output port, the fixed cover right side is provided with by a plurality of second bolts and is connected right baffle plate on the valve body.Fixed cover is provided with the fixed cover shoulder that matches with valve body right side circular groove.
Be equiped with spool in the valve opening in the valve body, spool comprises and being fixedly connected sequentially and coaxial first cylindrical body, first round bar, second cylindrical body and second round bar.
The spool left end is positioned at the location trepanning, on second round bar of right-hand member spring is housed, and the spring left end is replaced mutually with second cylindrical body of spool, and the spring right-hand member is replaced mutually with spacer, and spacer is arranged on hole end surface in the fixed cover.
The valve body that is positioned at first cylindrical body, one side offers first oil duct and second oil duct that is communicated with valve opening.The valve body that is positioned at fixed cover one side offers the adjustment oil duct that is communicated with valve opening.
Offer a plurality of first oil grooves on first cylindrical body, offer a plurality of second oil grooves on second cylindrical body.
Working principle
In the accompanying drawing, in hydraulic work system, when directed pump did not reach set pressure, spool relied on an end under the effect of spring, and namely valve body and spool are in normally off.When system pressure reaches set pressure, because the thrust that big end second cylindrical body of spool and the small end first cylinder surface product moment form, making spool overcome spring force moves to the other end with the frictional force of surging, open normally closed port rapidly, pressure oil is through first oil circuit (P), second oil circuit (T) oil sump tank of flowing through.When pressure reduced or do not work, spool was displaced downwardly to closed position in the spring force effect.Circulate with this, realize new balance.This structure is owing to act directly on the spool middle part by the formed thrust of spool self difference in areas, avoided being made up the thrust that just forms by multiple part in the spool bottom, therefore, the power of surging and frictional force have been reduced, make relief valve unlatching sensitivity higher, open and shut characteristic is more satisfactory, and the pressure loss under the rated flow obviously reduces.
Its advantage is:
The utility model has been simplified the relief valve sliding valve structure, has eliminated the power of surging, the frictional force that produce owing to the part processing precision error and has caused the drawback that resistance to motion is big.Simultaneously, directly adopt self difference in areas of spool to produce the Rational structure of the thrust of surging, reached the performance index requirement of relief valve in specific hydraulic system.Be fit to big flow lower pressure situation underflow stream, safety protection, unloading function, economic, practical, efficient.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
A kind of straight moving relief valve comprises valve body 1, setting sleeve 2, spool 3 and fixed cover 5.
Be provided with setting sleeve 2 in the valve body 1 valve opening left port, setting sleeve 2 left sides are provided with by two first bolts 10 and are connected right baffle-plate 9 on the valve body 1, setting sleeve 2 is provided with the setting sleeve shoulder that matches with valve body 1 left side circular groove, installs seal ring between setting sleeve 2 and the valve body 1.
Be provided with fixed cover 5 in the valve body 1 valve opening right output port, fixed cover 5 right sides are provided with by two second bolts 6 and are connected right baffle plate 7 on the valve body 1.Fixed cover 5 is provided with the fixed cover shoulder that matches with valve body 1 right side circular groove, installs seal ring between fixed cover 5 and the valve body 1, offers blind hole 18 on the fixed cover 5, and is for convenience detach.
Be equiped with spool 3 in the valve opening in the valve body 1, spool 3 comprises and being fixedly connected sequentially and coaxial first cylindrical body 11, first round bar 12, second cylindrical body 13 and second round bar 14.The diameter of first cylindrical body 11 is less than the diameter of second cylindrical body 13.Offer on first cylindrical body 11 on five first oil groove, 19, the second cylindrical bodys 13 and offer three second oil grooves 20.
The valve body 1 that is positioned at first cylindrical body, 11 1 sides offers first oil duct 15 and second oil duct 16 that is communicated with valve opening.The valve body 1 that is positioned at fixed cover 5 one sides offers the adjustment oil duct 17 that is communicated with valve opening.
When this relief valve was in closed condition, the position of first round bar 12 was corresponding with first oil duct, 15 positions, and the position of second cylindrical body 13 is corresponding with second oil duct, 16 positions.
Claims (3)
1. a straight moving relief valve comprises valve body (1), setting sleeve (2), spool (3) and fixed cover (5); It is characterized in that:
Be provided with setting sleeve (2) in valve body (1) the valve opening left port, setting sleeve (2) left side is provided with by a plurality of first bolts (10) and is connected right baffle-plate (9) on the valve body (1), the setting sleeve shoulder that setting sleeve (2) is provided with and valve body (1) left side circular groove matches;
Be provided with fixed cover (5) in valve body (1) the valve opening right output port, fixed cover (5) right side is provided with by a plurality of second bolts (6) and is connected right baffle plate (7) on the valve body (1); The fixed cover shoulder that fixed cover (5) is provided with and valve body (1) right side circular groove matches;
Be equiped with spool (3) in the valve opening in the valve body (1), spool (3) comprises and being fixedly connected sequentially and coaxial first cylindrical body (11), first round bar (12), second cylindrical body (13) and second round bar (14);
Spool (3) left end is positioned at setting sleeve (2) hole, on second round bar (14) of right-hand member spring (4) is housed, spring (4) left end is replaced mutually with second cylindrical body (13) of spool (3), spring (4) right-hand member is replaced mutually with spacer (8), and spacer (8) is arranged on the interior hole end surface of fixed cover (5);
The valve body (1) that is positioned at first cylindrical body (11) one sides offers first oil duct (15) and second oil duct (16) that is communicated with valve opening; The valve body (1) that is positioned at fixed cover (5) one sides offers the adjustment oil duct (17) that is communicated with valve opening.
2. a kind of straight moving relief valve according to claim 1 is characterized in that: offer blind hole (18) at described fixed cover (5).
3. a kind of straight moving relief valve according to claim 1 and 2 is characterized in that: offer five first oil grooves (19) on first cylindrical body (11), offer three second oil grooves (20) on second cylindrical body (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320172709 CN203176467U (en) | 2013-04-09 | 2013-04-09 | Direct-acting type overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320172709 CN203176467U (en) | 2013-04-09 | 2013-04-09 | Direct-acting type overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203176467U true CN203176467U (en) | 2013-09-04 |
Family
ID=49073164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320172709 Expired - Fee Related CN203176467U (en) | 2013-04-09 | 2013-04-09 | Direct-acting type overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203176467U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470937A (en) * | 2013-09-26 | 2013-12-25 | 左政� | High-pressure pneumatic lubrication station |
| CN103742662A (en) * | 2014-01-24 | 2014-04-23 | 中国船舶重工集团公司第七�三研究所 | Slide valve assembly of direct-acting overflow valve |
| CN104675781A (en) * | 2013-11-30 | 2015-06-03 | 中国科学院沈阳自动化研究所 | Compact type external controlled direct relief valve |
| CN105765209A (en) * | 2013-11-28 | 2016-07-13 | 罗伯特·博世有限公司 | Fuel injection system and method for operating the fuel injection system |
-
2013
- 2013-04-09 CN CN 201320172709 patent/CN203176467U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470937A (en) * | 2013-09-26 | 2013-12-25 | 左政� | High-pressure pneumatic lubrication station |
| CN103470937B (en) * | 2013-09-26 | 2016-02-24 | 左政� | High-pressure pneumatic lubrication station |
| CN105765209A (en) * | 2013-11-28 | 2016-07-13 | 罗伯特·博世有限公司 | Fuel injection system and method for operating the fuel injection system |
| CN104675781A (en) * | 2013-11-30 | 2015-06-03 | 中国科学院沈阳自动化研究所 | Compact type external controlled direct relief valve |
| CN103742662A (en) * | 2014-01-24 | 2014-04-23 | 中国船舶重工集团公司第七�三研究所 | Slide valve assembly of direct-acting overflow 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: 20130904 Termination date: 20180409 |