CN202301250U - Ultrahigh pressure proportional relief valve - Google Patents
Ultrahigh pressure proportional relief valve Download PDFInfo
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- CN202301250U CN202301250U CN2011203638054U CN201120363805U CN202301250U CN 202301250 U CN202301250 U CN 202301250U CN 2011203638054 U CN2011203638054 U CN 2011203638054U CN 201120363805 U CN201120363805 U CN 201120363805U CN 202301250 U CN202301250 U CN 202301250U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 239000012530 fluid Substances 0.000 claims description 34
- 230000006837 decompression Effects 0.000 claims description 31
- 230000007704 transition Effects 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract 1
- 238000013016 damping Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model relates to an ultrahigh pressure proportional relief valve which is characterized by comprising a valve casing, a valve seat, an inserted valve body, a main valve element, a first spring seat, a first spring, a steel ball, a second spring, a control piston, a third spring and a small control valve element, wherein the valve seat is provided with a perforated hole; the inserted valve body is provided with an axial pore passage; the main valve element is provided with a step perforated hole; the right end of the main valve element is inserted in the perforated hole of the valve seat and a second gap is formed between the right end of the main valve element and the inner wall of the perforated hole; when the main valve element moves rightwards, the perforated hole of the valve seat can be blocked; the first spring seat and the first spring are positioned in a spring cavity; the first spring seat is provided with a connection channel; a second oil port is communicated with a chamber at the right end of a piston part of the control piston; a third gap is formed between the periphery of the small control valve element and the inner wall of a small hole part of the step perforated hole; when the small control valve element moves forward, the steel ball can be ejected; and when the small control valve element further moves forward, the main valve element can also be pushed to move rightwards. The utility model provides the ultrahigh pressure proportional relief valve with a simple and reasonable structure and a small volume. The ultrahigh pressure proportional relief valve also has the advantages of light weight, low manufacturing cost and high control accuracy.
Description
Technical field
The utility model relates to a kind of hydrovalve, especially refers to a kind of ratio Decompression valves that Superhigh Pressure Hydraulic System is accomplished ultrahigh pressure pressure release function that is used for.
Background technique
The ultrahigh pressure Decompression valves is the main hydraulic element that are applied in the synthetic diamond cubic hinge press Superhigh Pressure Hydraulic System; Its major function is after cubic hinge press is accomplished product pressurize compacting, and the ultrahigh pressure pressure in the press oil cylinder cavity volume is arrived zero according to the drain charge of product technological requirement.As shown in Figure 3, existing ultrahigh pressure Decompression valves is the valve group that has comprised four groups of ultrahigh pressure Pilot operated check valves, solenoid directional control valve, a damping hole, controls pressure release speed through controlling several groups of solenoid directional control valve work.
In use there are following four shortcomings in existing ultrahigh pressure Decompression valves: at first, the whole volume and weight of Decompression valves is all very big, uses and installation causes certain difficulty to the client; Secondly, adopt four groups of control valve group user costs high; In addition, pressure release speed is the bang-bang control method, and pressure release speed can not continuous control, can not constitute closed loop control, and control accuracy is low, influences quality of product; At last, traditional Decompression valves carries out pressure release through damping hole is set, and the processing of damping hole is relatively more difficult, and the valve block structure of damping hole is complicated.
So existing ultrahigh pressure Decompression valves also can be done further improvement.
The model utility content
The utility model technical problem to be solved is that a kind of simple and reasonable and ultrahigh pressure ratio Decompression valves that volume is little is provided to above-mentioned existing technology present situation, and it also has in light weight, low cost of manufacture, advantage that control accuracy is high.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of ultrahigh pressure ratio Decompression valves is characterized in that: comprise valve casing, have first hydraulic fluid port, second hydraulic fluid port and the pressure relief opening that communicate with the inner passage of valve casing on the valve casing; Valve seat with perforation, be located in the inner passage of valve casing and and the inner passage between form liquid sealing; Plug-in mounting valve body with axial channel; Screw thread is plugged on the left end opening of the inner passage of valve casing; The axial channel middle part of plug-in mounting valve body has omoplate in the annular; Omoplate is separated into spring chamber and spool chamber with axial channel in this annular, also has the attachment hole that is communicated with first hydraulic fluid port and spool chamber on the sidewall of plug-in mounting valve body; Main valve plug with ladder perforation; Be positioned at spool chamber and ability left and right sides slippage; The left end of main valve plug pass in the said annular omoplate and and annular in form first gap between the omoplate inner circle wall; The right-hand member of main valve plug be plugged in the perforation of valve seat and and this perforation inwall between formation second gap, moving to right of main valve plug can block the perforation of valve seat; First spring seat; Be positioned at spring chamber; The right-hand member of first spring seat plugs in the said ladder perforation, and first spring seat has the connecting passage that is communicated with spring chamber and shoulder hole, also is provided with first spring that makes first spring seat and main valve plug keep the trend that moves to right in the spring chamber; Steel ball is positioned at the macropore portion that said ladder is bored a hole, and also is provided with in the macropore portion of ladder perforation to act on steel ball and make steel ball block second spring of the aperture portion trend of ladder perforation; Control piston; Be positioned at the right-hand member and the ability left and right sides slippage of the inner passage of valve casing; The piston portion of control piston and inner passage form liquid sealing; Also be arranged with in the bar portion of control piston and make control piston keep the 3rd spring of the trend that moves to right, said second hydraulic fluid port is communicated with the chamber of the piston portion right-hand member of control piston through the transition passage in the valve casing, and said pressure relief opening is between the piston portion and valve seat of control piston; The control small valve core; Be fixed on the front end of the bar portion of control piston; The front end of control small valve core is located in the aperture portion of said ladder perforation; Have third space between the inwall of the aperture portion of the periphery of control small valve core and ladder perforation, the reach of control small valve core can be backed down said steel ball, and the further reach of control small valve core can also promote main valve plug and move to left.
Further improve, above-mentioned second hydraulic fluid port of this Decompression valves is communicated with said transition passage through the proportional pressure-reducing valve that is inserted on the valve casing, and this ratio Decompression valves flow into the pressure of the pressure oil of transition passage from second hydraulic fluid port in order to control.Proportional pressure-reducing valve can enter into the oil pressure pressure in the transition passage from second hydraulic fluid port according to the size adjustment of control electric current; The distance that this oil pressure pressure decision control piston moves to left; And then the speed of decision pressure release, control mode is simple to operation, and proportional pressure-reducing valve is a conventional components; Buying is convenient, also can flow into the pressure of the pressure oil of transition passage certainly through other structure control from second hydraulic fluid port.
Above-mentioned second spring acts on said steel ball through second spring seat, and promptly the left end of second spring is resisted against on first spring seat that is inserted in the ladder perforation, and the right-hand member of second spring is resisted against on said second spring seat.Can make steel ball stressed more even like this, guarantee that steel ball effectively blocks the aperture portion of ladder perforation.
Middle part, the inner passage of above-mentioned valve casing has interior omoplate portion; The right-hand member of omoplate portion forms piston cavity in being somebody's turn to do; Interior omoplate portion is passed in the piston rod activity of said control piston; Said the 3rd spring one end is resisted against in this interior omoplate portion, and the other end of the 3rd spring is resisted against on the control piston, also has the through hole that is communicated with said piston cavity and pressure relief opening in the said interior omoplate portion.Leading role is not only played to the piston rod of control piston by interior omoplate portion, but also second spring is played the effect of support.
The middle part of above-mentioned main valve plug has conical surface, inlet's contact matching of the perforation that the moving to right of main valve plug can make this conical surface and valve seat.Conical surface can carry out better line contact sealing to the inlet of the perforation of valve seat, improves the sealing effect of main valve plug.
Above-mentioned pressure relief opening communicates with the pressure relief opening of proportional pressure-reducing valve.When the system works overpressure, cause oil pressure pressure height in the transition passage, at this moment proportional pressure-reducing valve also plays the effect of relief valve.
For ease of component-assembled such as main valve plug, first spring seat and first spring are arrived in the axial channel of plug-in mounting valve body, the right-hand member of above-mentioned plug-in mounting valve body has been threaded nut and has sealed, and the left end of said first spring holds on nut.
Above-mentioned valve casing is made up of left valve piece and right valve piece; Said first hydraulic fluid port and pressure relief opening are arranged on the left valve piece; The axis hole that runs through about said left valve piece has; Said right valve piece is fixed on the right-hand member of left valve piece and with said axis hole right-end openings sealing, said second hydraulic fluid port and transition passage are arranged on the right valve piece.This valve casing structure is convenient to the 3rd spring and piston set are installed in the valve casing.
Have the tapped through hole that communicates with the axis hole of left valve piece on the above-mentioned right valve piece, this tapped through hole internal thread is connected with emergent adjustment screw rod, and this emergent adjustment screw rod left end stretches in the axis hole and with control piston conflicts.Emergent adjustment screw rod plays the effect of emergency pressure relief; Break down at circuit or hydraulic system, just can carry out emergency pressure relief manually, the artificial adjustment screw rod of meeting an urgent need that rotates; Promote piston under external force and move to left, open steel ball and main valve plug and carry out quick pressure releasing.
Compared with prior art, the advantage of the utility model is: this ultrahigh pressure ratio Decompression valves need not four groups of solenoid directional control valves and four groups of ultrahigh pressure Pilot operated check valves of adopting cost higher, and simple in structure, the whole cost that relates to each parts in addition is low; And guide's control of this valve employing steel ball, if there is not steel ball, then the area of ultrahigh pressure pressure effect is very big; The pressure that the main valve plug unlatching needs can be very big, so the diameter of piston is very big, can increase the volume and weight of valve; Steel ball is set, after can the oil of spring chamber being released, a main valve plug spring-loaded; Cracking pressure is less, so this Decompression valves, volume are little, in light weight, rational in infrastructure; At last; This Decompression valves is controlled high pressure relief through three gaps; Existing relatively to adopt damping hole to control more simple, and it is also through the moving of main valve plug, and the length that makes the right-hand member of main valve plug be plugged in the perforation of valve seat changes; And then change ratio adjusting pressure release speed, make the pressure release speed of this Decompression valves can carry out continuous control and control accuracy height.
Description of drawings
Fig. 1 is the utility model embodiment's a structure sectional view;
Fig. 2 is the utility model embodiment's a schematic diagram;
Fig. 3 is the schematic diagram of existing ultrahigh pressure Decompression valves.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Like Fig. 1, shown in 2, be a preferred embodiment of the utility model.
A kind of ultrahigh pressure ratio Decompression valves comprises
Valve seat 9 with perforation, be located in the inner passage of valve casing 1 and and the inner passage of valve casing 1 between form liquid sealing.
Plug-in mounting valve body 2 with axial channel; Screw thread is plugged on the left end opening of the inner passage of valve casing 1; The right-hand member of plug-in mounting valve body 2 has been threaded nut 25 and has sealed; The axial channel middle part of plug-in mounting valve body 2 has omoplate 21 in the annular, and omoplate 21 is separated into spring chamber 22 and spool chamber 23 with axial channel in this annular, also has the attachment hole 24 that is communicated with the first hydraulic fluid port B and spool chamber 23 on the sidewall of plug-in mounting valve body 2.
Main valve plug 3 with ladder perforation 31; Be positioned at spool chamber 23 and ability left and right sides slippage; The left end of main valve plug 3 pass in the annular omoplate 21 and and annular in form the first gap a between omoplate 21 inner circle walls; The right-hand member of main valve plug 3 be plugged in the perforation of valve seat 9 and and this perforation inwall between the formation second gap b; Moving to right of main valve plug 3 can block the perforation of valve seat 9, and the middle part of main valve plug 3 has conical surface 32, and the moving to right of main valve plug 3 can make inlet's contact matching of this conical surface 32 and the perforation of valve seat 9.
Control piston 7; Be positioned at the right-hand member and the ability left and right sides slippage of the inner passage of valve casing 1; Interior omoplate portion 15 is passed in the piston rod activity of control piston 7; Form liquid sealing between the piston portion of control piston 7 and piston cavity 24 inner circle walls, also be arranged with in the bar portion of control piston 7 and make control piston 7 keep the 3rd spring 19, the three springs 19 1 ends of the trend that moves to right to be resisted against in this in omoplate portion 15; The other end of the 3rd spring 19 is resisted against on the control piston 7, also has the through hole 151 that is communicated with piston cavity 24 and pressure relief opening T in the interior omoplate portion 15; The second hydraulic fluid port X is communicated with the chamber of the piston portion right-hand member of control piston 7 through the transition passage 13 in the valve casing 1, and pressure relief opening T is between the piston portion and valve seat 9 of control piston 7; And the second hydraulic fluid port X is communicated with transition passage 13 through the proportional pressure-reducing valve 14 that is inserted on the valve casing 1; This ratio Decompression valves 14 flow into the pressure of the pressure oil of transition passage 13 from the second hydraulic fluid port X in order to control; Pressure relief opening T on the valve casing communicates with the pressure relief opening of proportional pressure-reducing valve 14, and ratio Decompression valves 14 can directly buy from market.
Control small valve core 6; Be fixed on the front end of the bar portion of control piston 7; The front end of control small valve core 6 is located in the aperture portion of ladder perforation 31; Have third space c between the inwall of the aperture portion of the periphery of control small valve core 6 and ladder perforation 31, the reach of control small valve core 6 can be backed down steel ball 8, and the further reach of control small valve core 6 can also promote main valve plug 3 and move to left.
Have the tapped through hole 121 that communicates with the axis hole of left valve piece 11 on the right valve piece 12; These tapped through hole 121 internal threads are connected with emergent adjustment screw rod 10; Between emergent adjustment screw rod 10 and the tapped through hole 121 is liquid sealing; Should emergent adjustment screw rod 10 left ends stretch in the axis hole and and conflict, the outer end of emergent adjustment screw rod 10 locking nut 18 that also has been threaded with control piston 7.
Various liquid sealings in the present embodiment all adopt seal ring to carry out liquid sealing.
The working principle and the process of this ultrahigh pressure ratio Decompression valves are following:
When the first hydraulic fluid port B pressure is carried out pressurize; Main valve plug 3 is pressed under the active force of first spring 17 above the valve seat 9, and steel ball 8 is in the aperture portion of the ladder perforation 31 that is pressed to main valve plug 3 under the active force of second spring 4 simultaneously, and the pressure oil of the first hydraulic fluid port B is through the first gap a between main valve plug 3 and the plug-in mounting valve body 2; Enter into spring chamber 22; Act on steel ball 8 simultaneously with above the main valve plug 3, so the time, the aperture portion of the ladder perforation 31 of steel ball 8 and main valve plug 3; Make the conical surface 32 of poppet valve core 3 and inlet's contact matching of the perforation of valve seat 9; They all are that linear sealing does not have leakage, can pressure be remained on the ultrahigh pressure state, promptly block between the first hydraulic fluid port B and the pressure relief opening T.
When needs carried out pressure release work, the second hydraulic fluid port X fed pressure oil, and proportional pressure-reducing valve 14 is according to the delivery pressure size of the pressure oil in the size adjustment runner transition passage 13 of control electric current, and the pressure oil in the transition passage 13 directly affacts on the control piston 7.Oil pressure in transition passage 13; Be enough to overcome the elastic force of the 3rd spring 19; Control piston 7 is to left movement, when oil pressure acts on the power that produces above the steel ball 8 greater than first spring 17 and second spring 4 and ultrahigh pressure pressure, promotes control small valve core 6 steel ball 8 is backed down; This moment, the pressure oil of the first hydraulic fluid port B finally flowed into pressure relief opening T through connecting passage 161, third space on the first gap a, spring chamber 22, first spring seat 16 successively, and the pressure of the first hydraulic fluid port B slowly descends.Because the first gap a and third space c are very little, about about 0.01mm, pressure release this moment speed is very mild, the very fast phenomenon of pressure release speed in the time of can not producing ultrahigh pressure greatly.
If pressure release speed is fast inadequately, the control electric current on the proportional pressure-reducing valve 14 can strengthen, and so only the second hydraulic fluid port X flows to the pressure increasing of the pressure oil in the transition passage 13; The working principle of proportional pressure-reducing valve 14 is an existing technology; Control piston 7 continues to left movement, and control small valve core 6 contacts with main valve plug 3, and main valve plug 3 is backed down; The pressure oil of the first hydraulic fluid port B is accelerated pressure release speed through the second gap b is flow into pressure relief opening T.
Through regulating the control size of current of proportional pressure-reducing valve 14, can change the interior length L of perforation that main valve plug 3 right-hand members are plugged in valve seat arbitrarily, therefore can ratio regulate the pressure release velocity magnitude.
Break down at circuit or hydraulic system; Just can carry out emergency pressure relief manually, spanner inserted in the inner hexagonal hole of emergent adjustment screw rod 10 rear ends, rotate emergent adjustment screw rod 10; Promote control piston 7 under external force and move to left, open steel ball 8 and main valve plug 3 carries out quick pressure releasing.
Through pressure transducer being set, can accomplish closed loop control very easily to pressure release speed at the superelevation nip.
Claims (9)
1. a ultrahigh pressure ratio Decompression valves is characterized in that: comprise
Valve casing (1) has first hydraulic fluid port (B), second hydraulic fluid port (X) and the pressure relief opening (T) that communicate with the inner passage of valve casing on the valve casing (1);
Valve seat (9) with perforation, be located in the inner passage of valve casing (1) and and the inner passage between form liquid sealing;
Plug-in mounting valve body (2) with axial channel; Screw thread is plugged on the left end opening of the inner passage of valve casing (1); The axial channel middle part of plug-in mounting valve body (2) has omoplate (21) in the annular; Omoplate (21) is separated into spring chamber (22) and spool chamber (23) with axial channel in this annular, also has the attachment hole (24) that is communicated with first hydraulic fluid port (B) and spool chamber (23) on the sidewall of plug-in mounting valve body (2);
Main valve plug (3) with ladder perforation (31); Be positioned at said spool chamber (23) and ability left and right sides slippage; The left end of main valve plug (3) pass in the said annular omoplate (21) and and annular in form first gap (a) between omoplate (21) inner circle wall; The right-hand member of main valve plug (3) be plugged in the perforation of valve seat (9) and and this perforation inwall between formation second gap (b), moving to right of main valve plug (3) can block the perforation of valve seat (9);
First spring seat (16); Be positioned at spring chamber (22); The right-hand member of first spring seat (16) is plugged in the said ladder perforation (31); First spring seat (16) has the connecting passage (161) of connection spring chamber (22) and shoulder hole (31), also is provided with first spring (17) that makes first spring seat (16) and main valve plug (3) keep the trend that moves to right in the said spring chamber (22);
Steel ball (8) is positioned at the macropore portion of said ladder perforation (31), also is provided with in the macropore portion of ladder perforation (31) to act on steel ball (8) and make steel ball (8) block second spring (4) of the aperture portion trend of ladder perforation (31);
Control piston (7); Be positioned at the right-hand member and the ability left and right sides slippage of the inner passage of valve casing (1); The piston portion of control piston (7) and inner passage form liquid sealing; Also be arranged with in the bar portion of control piston (7) and make control piston (7) keep the 3rd spring (19) of the trend that moves to right, said second hydraulic fluid port (X) is communicated with the chamber of the piston portion right-hand member of control piston (7) through the transition passage (13) in the valve casing (1), and said pressure relief opening (T) is positioned between the piston portion and valve seat (9) of control piston (7);
Control small valve core (6); Be fixed on the front end of the bar portion of control piston (7); The front end of control small valve core (6) is located in the aperture portion of said ladder perforation (31); Have third space (c) between the inwall of the aperture portion of the periphery of control small valve core (6) and ladder perforation (31), the reach of control small valve core (6) can be backed down said steel ball (8), and the further reach of control small valve core (6) can also promote main valve plug (3) and move to left.
2. ultrahigh pressure ratio Decompression valves according to claim 1; It is characterized in that: said second hydraulic fluid port (X) is communicated with said transition passage (13) through the proportional pressure-reducing valve (14) that is inserted on the valve casing (1), and this ratio Decompression valves (14) flow into the pressure of the pressure oil of transition passage (13) from second hydraulic fluid port (X) in order to control.
3. ultrahigh pressure ratio Decompression valves according to claim 1; It is characterized in that: said second spring (4) acts on said steel ball (8) through second spring seat (5); Promptly the left end of second spring (4) is resisted against on first spring seat (16) that is inserted in the ladder perforation (31), and the right-hand member of second spring (4) is resisted against on said second spring seat (5).
4. ultrahigh pressure ratio Decompression valves according to claim 1; It is characterized in that: the middle part, inner passage of said valve casing (1) has interior omoplate portion (15); The right-hand member of omoplate portion (15) forms piston cavity (24) in being somebody's turn to do; Interior omoplate portion (15) is passed in the piston rod activity of said control piston (7); Said the 3rd spring (19) one ends are resisted against in this interior omoplate portion (15), and the other end of the 3rd spring (19) is resisted against on the control piston (7), also have the through hole (151) that is communicated with said piston cavity (24) and pressure relief opening (T) in the said interior omoplate portion (15).
5. ultrahigh pressure ratio Decompression valves according to claim 1 is characterized in that: the middle part of said main valve plug (3) has conical surface (32), and the moving to right of main valve plug (3) can make inlet's contact matching of this conical surface (32) and the perforation of valve seat (9).
6. ultrahigh pressure ratio Decompression valves according to claim 2 is characterized in that: said pressure relief opening (T) communicates with the pressure relief opening of proportional pressure-reducing valve (14).
7. ultrahigh pressure ratio Decompression valves according to claim 1 is characterized in that: the right-hand member of said plug-in mounting valve body (2) has been threaded nut (25) and has sealed, and the left end of said first spring (17) holds on nut (25).
8. according to the described ultrahigh pressure ratio of arbitrary claim Decompression valves in the claim 1～7; It is characterized in that: said valve casing (1) is made up of left valve piece (11) and right valve piece (12); Said first hydraulic fluid port (B) and pressure relief opening (T) are arranged on the left valve piece (11); The axis hole that runs through about said left valve piece (11) has, said right valve piece (12) are fixed on the right-hand member of left valve piece (11) and with said axis hole right-end openings sealing, said second hydraulic fluid port (X) and transition passage (13) are arranged on the right valve piece (12).
9. ultrahigh pressure ratio Decompression valves according to claim 8; It is characterized in that: have the tapped through hole (121) that communicates with the axis hole of left valve piece (11) on the said right valve piece (12); This tapped through hole (121) internal thread is connected with emergent adjustment screw rod (10), and this emergent adjustment screw rod (10) left end stretches in the axis hole and with control piston (7) conflicts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203638054U CN202301250U (en) | 2011-09-22 | 2011-09-22 | Ultrahigh pressure proportional relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203638054U CN202301250U (en) | 2011-09-22 | 2011-09-22 | Ultrahigh pressure proportional relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202301250U true CN202301250U (en) | 2012-07-04 |
Family
ID=46370159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203638054U Withdrawn - After Issue CN202301250U (en) | 2011-09-22 | 2011-09-22 | Ultrahigh pressure proportional relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202301250U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287412A (en) * | 2011-09-22 | 2011-12-21 | 宁波汉商液压有限公司 | Ultra-high pressure proportional relief valve |
| CN102889282A (en) * | 2012-09-18 | 2013-01-23 | 芜湖市续元工贸有限公司 | Positioning pin |
| CN103244497A (en) * | 2013-05-13 | 2013-08-14 | 深圳市瑞格尔仪器有限公司 | Ultrahigh pressure hydraulic servo valve core, servo valve, one-way loading system and two-way loading system |
| CN105090011A (en) * | 2014-05-13 | 2015-11-25 | 佛山市科达液压机械有限公司 | Novel DR valve structure for A4VSO pump |
| CN108223892A (en) * | 2016-12-09 | 2018-06-29 | 湖北和瑞精密机械制造有限公司 | A kind of high pressure air governor relief valve |
| CN118912056A (en) * | 2024-07-29 | 2024-11-08 | 博翎仕创科技(常州)有限公司 | Reversible pressure maintaining valve |
-
2011
- 2011-09-22 CN CN2011203638054U patent/CN202301250U/en not_active Withdrawn - After Issue
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287412A (en) * | 2011-09-22 | 2011-12-21 | 宁波汉商液压有限公司 | Ultra-high pressure proportional relief valve |
| CN102287412B (en) * | 2011-09-22 | 2013-09-25 | 宁波汉商液压有限公司 | Ultra-high pressure proportional relief valve |
| CN102889282A (en) * | 2012-09-18 | 2013-01-23 | 芜湖市续元工贸有限公司 | Positioning pin |
| CN103244497A (en) * | 2013-05-13 | 2013-08-14 | 深圳市瑞格尔仪器有限公司 | Ultrahigh pressure hydraulic servo valve core, servo valve, one-way loading system and two-way loading system |
| CN105090011A (en) * | 2014-05-13 | 2015-11-25 | 佛山市科达液压机械有限公司 | Novel DR valve structure for A4VSO pump |
| CN105090011B (en) * | 2014-05-13 | 2017-03-15 | 佛山市科达液压机械有限公司 | A4VSO pump DR valve arrangement |
| CN108223892A (en) * | 2016-12-09 | 2018-06-29 | 湖北和瑞精密机械制造有限公司 | A kind of high pressure air governor relief valve |
| CN108223892B (en) * | 2016-12-09 | 2024-05-14 | 湖北和瑞精密机械制造有限公司 | High-pressure pneumatic pressure relief valve |
| CN118912056A (en) * | 2024-07-29 | 2024-11-08 | 博翎仕创科技(常州)有限公司 | Reversible pressure maintaining valve |
| CN118912056B (en) * | 2024-07-29 | 2025-05-13 | 竹箦阀业有限公司 | Reversible pressure maintaining valve |
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