CN201372977Y - Cartridge brake valve - Google Patents
Cartridge brake valve Download PDFInfo
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- CN201372977Y CN201372977Y CN200820157362U CN200820157362U CN201372977Y CN 201372977 Y CN201372977 Y CN 201372977Y CN 200820157362 U CN200820157362 U CN 200820157362U CN 200820157362 U CN200820157362 U CN 200820157362U CN 201372977 Y CN201372977 Y CN 201372977Y
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Abstract
The utility model discloses a cartridge brake valve, which comprises a valve block as well as a counterbalance valve A, a counterbalance valve B, a shuttle valve, and a pressure reducing valve which are inserted on the valve block, wherein the valve block is communicated with the corresponding oil ports of the valves through oil ducts. The cartridge brake valve can be used for limiting too high oil pressure so as to protect a motor, can immediately brake the motor when the pipeline of a main oil way breaks, prevent the speeding of the hydraulic motor caused by insufficient oil supply in an open loop, and has the advantages of large maximum flow, easy implementation of various installation sizes, and simple structure and convenient processing of flow channels.
Description
Technical field
The utility model relates to a kind of plug-in type brake valve, relates in particular to the plug-in type brake valve of a kind of use on oil hydraulic motor.
Background technique
The plug-in type brake valve can prevent open circuit because the oil hydraulic motor hypervelocity (promptly out of control) that the fuel feeding deficiency causes; Play the protection motor during motor overload; When the pipe breakage of working connection, can at once motor be braked.Runner complexity in the most valve piece of present plug-in type brake valve, the casting difficulty is big and be subjected to multiple effects limit such as flow, installation dimension, connection that can not convenient and suitable different model motor hydraulic fluid port fishplate bar.
The model utility content
Technical problem to be solved in the utility model provide a kind of peak rate of flow big, be easy to realize multiple installation dimension, runner processing is the plug-in type brake valve easily.
In order to solve the problems of the technologies described above, plug-in type brake valve of the present utility model adopts following technological scheme:
A kind of plug-in type brake valve is characterized in that: comprise valve piece and contend with the valve A and the valve B that contends with that are inserted on the valve piece;
Described contend with valve A and the valve B that contends with all have side direction hydraulic fluid port, end face hydraulic fluid port, restriction, by in conjunction with or separates upper valve core and the nonreturn valve core that side direction hydraulic fluid port and end face hydraulic fluid port are cut off or be communicated with, have on the described upper valve core and restriction ring-like oil groove connection and that under the oiling situation, upper valve core is separated with nonreturn valve core;
Described valve piece has high pressure hydraulic fluid port A, the high pressure hydraulic fluid port A ' that is communicated with respectively with side direction hydraulic fluid port and the end face hydraulic fluid port of the valve A that contends with, low pressure hydraulic fluid port B, the low pressure hydraulic fluid port B ' that is communicated with respectively with side direction hydraulic fluid port and the end face hydraulic fluid port of the valve B that contends with and two oil ducts that the restriction of high pressure hydraulic fluid port A and the valve B that contends with, low pressure hydraulic fluid port B and the restriction of the valve A that contends with are communicated with respectively.
Also be fitted with shuttle valve and reduction valve on the described valve piece; The shuttle valve core that described shuttle valve has the left shuttle valve chamber that is communicated with high pressure hydraulic fluid port A, the right shuttle valve chamber that is communicated with low pressure hydraulic fluid port B, shuttle valve oil outlet and above-mentioned left shuttle valve chamber, right shuttle valve chamber, shuttle valve oil outlet are connected each other, shuttle valve in-core are provided with by only rolling selectively left shuttle valve chamber and the shuttle valve oil outlet connects or the ball that only right shuttle valve chamber and shuttle valve oil outlet connected; Described reduction valve have the reduction valve oil outlet and be communicated with the shuttle valve oil outlet and according to oil pressure in the valve adjust automatically the hydraulic fluid port size the decompression hydraulic fluid port; Also has the braking hydraulic fluid port Br that is communicated with the reduction valve oil outlet on the described valve piece.
Adopt technique scheme, plug-in type brake valve of the present utility model is in when work, and high pressure oil enters from high pressure hydraulic fluid port A, and the nonreturn valve core of the valve A that promotes to contend with separates with upper valve core, the contend with side direction hydraulic fluid port of valve A and end face hydraulic fluid port connects, and high pressure oil just flow among the high pressure hydraulic fluid port A '; A part of high pressure oil can be through the restriction of the valve B that contends with among the high pressure hydraulic fluid port A simultaneously, enter in the ring-like oil groove of the valve B that contends with, the contend with upper valve core of valve B of promotion separates with nonreturn valve core, side direction hydraulic fluid port and the end face hydraulic fluid port of the valve B that contends with are connected, and at this moment the low pressure oil that flows out from oil hydraulic motor just can flow to low pressure hydraulic fluid port B from low pressure hydraulic fluid port B ' hydraulic fluid port.If the oil pressure among the high pressure hydraulic fluid port A ' is excessive, surpassed setting value, the upwards action of upper valve core of the valve A that then promotes to contend with; separate with nonreturn valve core, hydraulic oil flows to high pressure hydraulic fluid port A, overflow from working connection from high pressure hydraulic fluid port A '; limit overpressure with this, play the effect of protection motor.
High pressure A hydraulic fluid port communicates with left shuttle valve chamber, and low pressure hydraulic fluid port B communicates with right shuttle valve, and the high pressure oil among the high pressure hydraulic fluid port A enters left shuttle valve chamber; Enter reduction valve from the high pressure oil of shuttle valve oil outlet outflow through the decompression hydraulic fluid port, if the high pressure oil oil pressure that enters in the reduction valve is too high, the decompression hydraulic fluid port will reduce automatically, flows in the reduction valve to limit high oil pressure, limits oil pressure, reaches the effect of decompression.
Because the flow of plug-in type brake valve can be by the latus rectum decision of the valve that contends with, so can change the size of the specification change flow of the valve that contends with according to actual needs; The installation dimension of hydraulic fluid port fishplate bar is by valve piece decision, can realize the size change easily adapting to different demands, and the oil channel structure of valve piece is simple, easy to process.
Therefore, it is too high that plug-in type brake valve of the present utility model can be used to limit oil pressure, when the pipe breakage of working connection, can be at once with the motor braking, and have peak rate of flow big, be easy to realize multiple installation dimension, the advantage that flow passage structure is simple, easy to process.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is elaborated:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that A-A of the present utility model is to sectional drawing;
Fig. 3 is that B-B of the present utility model is to sectional drawing.
Fig. 4 is the structural representation of reduction valve of the present utility model.
Embodiment
As depicted in figs. 1 and 2, plug-in type brake valve of the present utility model comprises valve piece 100 and two contend with the valve A200 and the valve B200 ' that contend with being inserted on the valve piece 100.
Wherein, contend with valve A, B are same structure, comprise the valve pocket 210 that contends with, upper valve core 220, nonreturn valve core 230, big spring 240, little spring 250, screw rod 260.The contend with bottom of valve A, A ' all has side direction hydraulic fluid port 270 and end face hydraulic fluid port 280.
For the convenience of processing and assembling, the valve pocket 210 that contends be divided into contend with valve pocket 211 and under the valve pocket 212 that contends with, the valve pocket 212 that contends with down is socketed in the bottom of contending with valve pocket 211, upper valve core 220 is located at down in the valve pocket 212 that contends with, and contend with down valve pocket 212 and upper valve core 220 respective side have the lateral port 213,221 that runs through with side direction hydraulic fluid port 270 to hydraulic fluid port 270 positions.
The lower end of upper valve core 220 has the end face opening 222 that connects with end face hydraulic fluid port 280, and the top of upper valve core 220 has little spring chamber 223.And nonreturn valve core 230 has with the end face opening 222 of spool 220 and blocks the one-way valve core print 231 of end face opening 222 and stretch into the into one-way valve core bar 232 in the little spring chamber 223 of upper valve core 220 from one-way valve core print 231.Be with on the one-way valve core bar 232 on little spring 250 and the termination and be rotary with submissile spring abutment 225, submissile spring abutment 225 is used for fixing little spring 250 and regulates the tension force of little spring 250.
On last valve pocket 211 outer circumferential faces that contend with, have restriction 290, have ring-like oil groove 226 on the outer circumferential face on upper valve core 220 tops, on last the contend with valve pocket 211 and the valve pocket 212 that contends with down, have throttle orifice 215,216 restriction 290 and 226 connections of ring-like oil groove.
Last inside of contending with valve pocket 211 be positioned at contend with down valve pocket 212 and upper valve core 220 above the space be big spring chamber 217, has the screw rod 260 that stretches into big spring chamber 217 from the upper end of the valve pocket 211 that contends with, in big spring chamber 217, be positioned at and be fixed with big spring seat 218 on the screw rod 260, also be rotary with setscrew nut 219 on the termination of screw rod 260.Big spring 240 is enclosed within on the screw rod 260, and an end heads on big spring seat 218, and the other end heads on upper valve core 220.
Valve piece 100 has high pressure hydraulic fluid port A, high pressure hydraulic fluid port A ', low pressure hydraulic fluid port B, low pressure hydraulic fluid port B ', two oil ducts 101,102.Wherein, high pressure hydraulic fluid port A is communicated with the side direction hydraulic fluid port 270 of one of them valve A that contends with, and high pressure hydraulic fluid port A ' is communicated with the end face hydraulic fluid port 280 of this valve A that contends with.Low pressure hydraulic fluid port B is communicated with the side direction hydraulic fluid port 270 of another valve B that contends with, and low pressure hydraulic fluid port B ' is communicated with the end face hydraulic fluid port 280 of this valve B that contends with.Oil duct 101 is communicated with high pressure hydraulic fluid port A with the restriction 290 of the valve B that contends with, oil duct 102 presses hydraulic fluid port B to be communicated with the restriction 290 of the valve A that contends with low pressure.
In addition, has throttle orifice 227 and be communicated to high pressure hydraulic fluid port A and low pressure hydraulic fluid port B in 223 bottoms, little spring chamber of contend with valve A, A ' by the throttle orifice 228 on the valve pocket 212 that contends with down.When upper valve core 220 and nonreturn valve core 230 have relative movement, the hydraulic oil in the little spring chamber is flowed out rapidly from throttle orifice 227 and throttle orifice 228.
As shown in Figure 3, also be fitted with shuttle valve 300 and reduction valve 400 on the valve piece 100.
Enter the axial hole 323 of shuttle valve core 320 from left shuttle valve chamber 340 when high pressure oil, oil pressure is pushed ball 330 to right side, shuttle valve oil outlet 360 is communicated with through shuttle valve oil outlet 361 and left shuttle valve chamber 340, and shuttle valve oil outlet 360 and right shuttle valve chamber 350 cuts off, the high pressure oil that enters from left shuttle valve chamber 340 just through ball chamber 324,360 outflows of shuttle valve oil outlet; If high pressure oil enters the axial hole 323 of shuttle valve core 320 from right shuttle valve chamber 350, oil pressure is pushed ball 330 to left side, right shuttle valve chamber 350 is communicated with through shuttle valve oil outlet 361 and shuttle valve oil outlet 360, and shuttle valve oil outlet 360 and left shuttle valve chamber 340 cuts off, the high pressure oil that enters from right shuttle valve chamber 350 just through ball chamber 324,360 outflows of shuttle valve oil outlet.
On valve piece 100, high pressure hydraulic fluid port A also is communicated with left shuttle valve chamber 340, and low pressure hydraulic fluid port B also is communicated with right shuttle valve chamber 350.
In conjunction with Fig. 4, reduction valve 400 comprises decompression valve pocket 410, sleeve 420, relief pressure valve cartridge 430, adjusting screw rod 440, relief spring 450 and elasticity top board 460.
Wherein, sleeve 420 and decompression valve pocket 410 are inserted on the valve piece 100 at right side formation reduction valve oil outlet 470.Relief pressure valve cartridge 430 is a cylinder type, and the left side is that relief spring chamber 431, right side are that relief pressure valve cartridge chamber 432, centre have the throttle orifice 433 with relief spring chamber 431 and 432 connections of relief pressure valve cartridge chamber.Relief pressure valve cartridge 430 is installed in the sleeve 420, and sleeve 420 right-hand members have the baffle ring that backstop relief pressure valve cartridge 430 moves right.Have hydraulic fluid port 434 on the relief pressure valve cartridge chamber 432 of relief pressure valve cartridge 430, the position of sleeve 420 corresponding hydraulic fluid ports 434 has hydraulic fluid port 422, interlocked the interruption-forming decompression hydraulic fluid port 480 of reduction valve 400, the size that can regulate decompression hydraulic fluid port 480 by the intervening portion of regulating hydraulic fluid port 434 and hydraulic fluid port 422 that hydraulic fluid port 434 and hydraulic fluid port 422 forms.
The left end of sleeve 420 is provided with relief spring seat 451, and relief spring 450 is arranged in relief spring chamber 431, and left end is positioned on the relief spring seat 451.The center of relief spring seat 451 has a throttle orifice 452.Elasticity top board 460 is positioned at the outside of relief spring seat 451 in decompression valve pocket 410, under elastic reaction throttle orifice 452 is blocked.Described elasticity top board 460 is made of left pressure adjusting spring seat 461, right pressure adjusting spring seat 462 and the pressure adjusting spring 463 be located between this two spring seat.Adjusting screw rod 440 1 ends deeply reduce pressure and withstand left pressure adjusting spring seat 461 in the valve pocket 410, and the other end is positioned at outside the decompression valve pocket 410, is rotary with look nut 441 on it.
More than be exactly of the present utility model plug-in type brake valve, its working method is as follows:
High pressure oil enters from high pressure hydraulic fluid port A, the nonreturn valve core 230 of the valve A that promotes downwards to contend with, and nonreturn valve core 230 separates with upper valve core 220, and the side direction hydraulic fluid port 270 of the valve A that contends with communicates with end face hydraulic fluid port 280, and high pressure oil flow into high pressure hydraulic fluid port A '; Some flows into the restriction 290 of the valve B that contends with high pressure oil among the while high pressure hydraulic fluid port A through oil duct 101, and in the ring-like oil groove 226 of throttle orifice 215,216 inflows, promote upwards action of upper valve core 220, the side direction hydraulic fluid port 270 of valve B of contending with communicates with end face hydraulic fluid port 280, makes the low pressure oil that flows out from motor flow to low pressure hydraulic fluid port B from low pressure hydraulic fluid port B ' through end face hydraulic fluid port 280, the side direction hydraulic fluid port 270 of the valve B that contends with.If the oil pressure among the high pressure hydraulic fluid port A ' is excessive, surpassed setting value, the upwards action of upper valve core 220 of the valve A that then promotes to contend with, hydraulic oil flows to high pressure hydraulic fluid port A from high pressure hydraulic fluid port A ', overflow from working connection, it is too high to limit oil pressure with this.High pressure hydraulic fluid port A communicate with the left shuttle valve chamber 340 of shuttle valve 300 (low pressure hydraulic fluid port B communicates with the right shuttle valve chamber 350 of shuttle valve 300), high pressure oil among the high pressure hydraulic fluid port A enters the left shuttle valve chamber 340 of shuttle valve 300, and the shuttle valve oil outlet 360 from shuttle valve 300 flows to reduction valve 400 through ball chamber 324.High pressure oil enters relief pressure valve cartridge chamber 432 from decompression hydraulic fluid port 480, a part flows to braking hydraulic fluid port Br from reduction valve oil outlet 470, another part enters relief spring chamber 431 through throttle orifice 433, if the oil pressure that enters in the reduction valve 400 is excessive, oil pressure is by being backed down right pressure adjusting spring seat 462 left through throttle orifice 452 in the relief spring chamber 431, make and form a slit between right pressure adjusting spring seat 462 and the relief spring seat 451, oil in the relief spring chamber 431 will be through this slit, restriction 411, flows out from leaking hydraulic fluid port L.At this moment, the oil pressure in the relief spring chamber 431 will be lower than the oil pressure in relief pressure valve cartridge chamber 432, and relief pressure valve cartridge 430 will be to left movement, and the hydraulic fluid port 480 that will reduce pressure reduces, with the oil pressure in the restriction reduction valve 400.
Therefore, if in running, oil pressure interrupts suddenly among the high pressure hydraulic fluid port A, and the nonreturn valve core 230 of the valve A that then contends with can be closed at once, keeps high oil pressure among the high pressure hydraulic fluid port A ', prevents the motor counter-rotating; The upper valve core 220 that contends with simultaneously among the valve B can be closed at once, because factors such as motor inertia are rotated further; oil pressure among the low pressure hydraulic fluid port B ' is increased, when oil pressure surpasses setting value, the upwards action of upper valve core 220 of the valve A that promotes to contend with; realize overflow, play the protection motor.
Because the flow of plug-in type brake valve can be by the latus rectum decision of the valve that contends with, so can change the size of the specification change flow of the valve that contends with according to actual needs; The installation dimension of hydraulic fluid port fishplate bar is by valve piece decision, can realize the size change easily adapting to different demands, and the oil channel structure of valve piece is simple, easy to process.
Therefore, it is too high that plug-in type brake valve of the present utility model can be used to limit oil pressure, plays the protection motor; When the pipe breakage of working connection, can at once motor be braked; And prevent open circuit because the oil hydraulic motor hypervelocity that the fuel feeding deficiency causes, and have peak rate of flow big, be easy to realize multiple installation dimension, the advantage that flow passage structure is simple, easy to process.
It more than is exactly plug-in type brake valve of the present utility model, but, one skilled in the art would recognize that above-mentioned embodiment is exemplary, be to be the restriction that this patent is comprised scope in order better to make those skilled in the art can understand this patent, can not to be interpreted as; So long as according to spirit that this patent discloses done anyly be equal to change or modify, all fall into the scope that this patent comprises.
Claims (7)
1, a kind of plug-in type brake valve is characterized in that:
Comprise valve piece (100) and be inserted into contend with the valve A and the valve B that contends with on the valve piece;
Described contend with valve A and the valve B that contends with all have side direction hydraulic fluid port (270), end face hydraulic fluid port (280), restriction (290), by in conjunction with or separates side direction hydraulic fluid port (270) and end face hydraulic fluid port (280) cuts off or the upper valve core (220) and the nonreturn valve core (230) of connection, have on the described upper valve core (220) and restriction (290) ring-like oil groove (226) connection and that under the oiling situation, upper valve core (220) is separated with nonreturn valve core (230);
Described valve piece (100) has high pressure hydraulic fluid port A, the high pressure hydraulic fluid port A ' that is communicated with respectively with side direction hydraulic fluid port (270) and the end face hydraulic fluid port (280) of the valve A that contends with, low pressure hydraulic fluid port B, the low pressure hydraulic fluid port B ' that is communicated with respectively with side direction hydraulic fluid port (270) and the end face hydraulic fluid port (280) of the valve B that contends with and two oil ducts (101,102) that the restriction (290) of high pressure hydraulic fluid port A and the valve B that contends with, low pressure hydraulic fluid port B and the restriction (290) of the valve A that contends with are communicated with respectively.
2, plug-in type brake valve according to claim 1 is characterized in that:
Also be fitted with shuttle valve (300) and reduction valve (400) on the described valve piece (100);
The shuttle valve core (320) that described shuttle valve (300) has the left shuttle valve chamber (340) that is communicated with high pressure hydraulic fluid port A, the right shuttle valve chamber (350) that is communicated with low pressure hydraulic fluid port B, shuttle valve oil outlet (360) and above-mentioned left shuttle valve chamber (340), right shuttle valve chamber (350), shuttle valve oil outlet (360) are connected each other is provided with in the shuttle valve core (320) by only rolling selectively left shuttle valve chamber (340) and shuttle valve oil outlet (360) connects or only with the ball (330) of right shuttle valve chamber (350) and shuttle valve oil outlet (360) perforation;
Described reduction valve (400) have reduction valve oil outlet (470) and be communicated with shuttle valve oil outlet (360) and according to oil pressure in the valve adjust automatically the hydraulic fluid port size decompression hydraulic fluid port (480);
Also has the braking hydraulic fluid port Br that is communicated with reduction valve oil outlet (470) on the described valve piece (100).
3, plug-in type brake valve according to claim 1 and 2 is characterized in that:
The described valve A that contends with also includes the valve pocket that contends with (210), big spring (240), little spring (250) with the valve B that contends with;
The described valve pocket that contends with (210) bottom and upper valve core (220) respective side all have the lateral port that runs through with side direction hydraulic fluid port (270) to hydraulic fluid port (270) position, the lower end of described upper valve core (220) has the end face opening that connects with end face hydraulic fluid port (280), top has little spring chamber (223), described nonreturn valve core (230) has the one-way valve core print (231) that cooperates with the end face opening (222) of upper valve core (220) and stretches into the into one-way valve core bar (232) of little spring chamber (223) from one-way valve core print (231), and little spring (250) is enclosed within (232) on the one-way valve core bar;
The top that the valve pocket (210) that contends with is positioned at upper valve core (220) has big spring chamber (217), big spring (240) is placed in the big spring chamber (217), upper valve core (220) is withstood in its lower end, and the valve pocket that contends with (210) also has the throttle orifice that is communicated with ring-like oil groove (226) and restriction (290).
4, plug-in type brake valve according to claim 3 is characterized in that:
The bottom, little spring chamber (223) of the described valve A that contends with, the valve B that contends with has the throttle orifice (227) that is communicated to high pressure hydraulic fluid port A, low pressure hydraulic fluid port B respectively.
5, plug-in type brake valve according to claim 2 is characterized in that:
Described reduction valve (400) comprises decompression valve pocket (410), sleeve (420), relief pressure valve cartridge (430), relief spring (450) and elasticity top board (460);
Described sleeve (420) and decompression valve pocket (410) are inserted into valve piece (100) and go up at right side formation reduction valve oil outlet (470);
Relief pressure valve cartridge (430) left side is that relief pressure valve cartridge chamber (432), centre have the throttle orifice (433) that relief spring chamber (431) and relief pressure valve cartridge chamber (432) are communicated with for relief spring chamber (431), right side; Relief pressure valve cartridge (430) is installed in the sleeve (420);
Have hydraulic fluid port (434) on the relief pressure valve cartridge chamber (432) of relief pressure valve cartridge (430), the position of the corresponding hydraulic fluid port of sleeve (420) (434) has hydraulic fluid port (422), hydraulic fluid port (434) and hydraulic fluid port (422) form the decompression hydraulic fluid port (480) of reduction valve (400) that interlocked interruption-forming;
The left end of sleeve (420) is provided with relief spring seat (451), and relief spring (450) is arranged in relief spring chamber (431), and left end is positioned at relief spring seat (451), and the center of relief spring seat (451) has a throttle orifice (452);
Elasticity top board (460) is positioned at the outside of relief spring seat (451) in decompression valve pocket (410), block throttle orifice (452);
Decompression valve pocket (410) left end also has the leakage restriction (411) at elasticity top board (460) and relief spring seat (451) the leakage hydraulic fluid port L on the connecting valve piece (100) and throttle orifice (452) when separating.
6, plug-in type brake valve according to claim 5 is characterized in that:
Described elasticity top board (460) is made of left pressure adjusting spring seat (461), right pressure adjusting spring seat (462) and the pressure adjusting spring (463) be located between this two spring seat.
7, plug-in type brake valve according to claim 6 is characterized in that:
Described reduction valve (400) also comprises adjusting screw rod (440), and the one end deeply reduces pressure and withstands left pressure adjusting spring seat (461) in the valve pocket (410), and it is outer and be rotary with look nut (441) that the other end is positioned at decompression valve pocket (410).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820157362U CN201372977Y (en) | 2008-12-18 | 2008-12-18 | Cartridge brake valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820157362U CN201372977Y (en) | 2008-12-18 | 2008-12-18 | Cartridge brake valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201372977Y true CN201372977Y (en) | 2009-12-30 |
Family
ID=41499061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200820157362U Expired - Lifetime CN201372977Y (en) | 2008-12-18 | 2008-12-18 | Cartridge brake valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201372977Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762922A (en) * | 2016-12-22 | 2017-05-31 | 常州科研试制中心有限公司 | The hydraulic pressure fast-discharge valve of monorail crane brake cylinder |
-
2008
- 2008-12-18 CN CN200820157362U patent/CN201372977Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762922A (en) * | 2016-12-22 | 2017-05-31 | 常州科研试制中心有限公司 | The hydraulic pressure fast-discharge valve of monorail crane brake cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091230 |