CN112901580B - High-performance control valve - Google Patents
High-performance control valve Download PDFInfo
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- CN112901580B CN112901580B CN202110043197.7A CN202110043197A CN112901580B CN 112901580 B CN112901580 B CN 112901580B CN 202110043197 A CN202110043197 A CN 202110043197A CN 112901580 B CN112901580 B CN 112901580B
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- operating
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- end cover
- valve
- cavity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/008—Reduction of noise or vibration
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a high-performance control valve, which comprises a valve body, an operating end cover, a rear end cover and a valve rod, wherein the operating end cover and the rear end cover are respectively arranged on two sides of the valve body and form an inner cavity, the valve rod is arranged in the inner cavity, the inner cavity comprises a valve body inner cavity, an operating end cavity and a limiting end cavity, the valve rod respectively comprises an operating end extending into the operating end cover and a limiting end extending into the rear end cover, a buffer device matched with the operating end is arranged in the operating end cavity, a limiting device matched with the limiting end is arranged in the limiting end cavity, a riveting pin shaft is arranged on the operating end, an operating fork is arranged on the riveting pin shaft, an operating rotating shaft is arranged on the operating fork, and an operating rod is arranged on the operating rotating shaft. The high-performance control valve obtained by the invention avoids sudden pressure change of a hydraulic system and slows down the vibration of the whole equipment; the rust of internal parts is avoided, the reliability of the control valve is improved, and the control valve can be used in the severe environment with vibration and humidity for a long time; simple structure, convenient and accurate stroke of control valve rod.
Description
Technical Field
The invention relates to the field of control valves, in particular to a high-performance control valve.
Background
The wood splitting machine has various types, including manual, pneumatic, electric and motor-driven wood splitting machines, and is widely used in garden and timber industries of Europe, america and Australia, wood is an extremely environment-friendly organic energy source, and the countries advocate using the wood to heat, warm and cook, so all farms and even households use the wood splitting machine; when wood is split, the wood is generally in a humid environment, and frequent vibration can be generated in the working process; at present, control valves are commonly arranged on wood splitting machines at home and abroad.
The general control valve is not suitable for working in a long-term vibration and humidity environment of a log splitter, because the sealing treatment is not considered at the joint of the valve body and the end cover in the general control valve, if the general control valve works in the long-term vibration and humidity environment, the sealing property of the joint of the valve body and the end cover is easily deteriorated, once the humidity air enters the interior of the valve body, not only can the internal parts be easily rusted, but also the service life of hydraulic oil is easily reduced, and the reliability of the working of the control valve is reduced;
when a valve rod of a general control valve returns, the pressure of hydraulic oil in the control valve can change suddenly, so that parts inside the control valve and the whole control system can generate violent vibration, the service life of the parts inside the control valve is influenced, the whole external wood splitting equipment can generate violent vibration, and the failure rate of the whole equipment is improved.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide a high-performance control valve which has the advantages of resetting buffer, convenience in controlling the stroke of a valve rod and good sealing performance.
In order to achieve the purpose, the high-performance control valve designed by the invention comprises a valve body, an operating end cover, a rear end cover and a valve rod, wherein the operating end cover and the rear end cover are respectively arranged on two sides of the valve body and form an inner cavity, the valve rod is arranged in the inner cavity, the inner cavity comprises a valve body inner cavity, an operating end cavity and a limiting end cavity, the valve rod respectively comprises an operating end extending into the operating end cover and a limiting end extending into the rear end cover, a buffer device matched with the operating end is arranged in the operating end cavity, a limiting device matched with the limiting end is arranged in the limiting end cavity, a riveting pin shaft is arranged on the operating end, an operating shifting fork is arranged on the riveting pin shaft, an operating rotating shaft is arranged on the operating shifting fork, and an operating lever is arranged on the operating rotating shaft.
In order to limit the stroke of the valve rod, the limiting device comprises a limiting spring, a first spring seat and a second spring seat, the first spring seat is matched with the limiting end, the second spring seat is matched with the rear end cover, and the limiting spring is arranged between the first spring seat and the second spring seat.
In order to limit the stroke of the valve rod, auxiliary spring limiting seats are arranged in the first spring seat and the second spring seat, auxiliary limiting springs are arranged in the auxiliary spring limiting seats, rear end cover locating sleeves are sleeved outside the limiting ends, stoppers and ball holes are arranged on the limiting ends, ball seats are arranged on the stoppers, first balls matched with the auxiliary limiting springs are arranged on the ball seats, second balls matched with the rear end cover locating sleeves are arranged on the ball holes, the second balls are tangent to the first balls, the inner surface of each rear end cover locating sleeve sequentially comprises a straight section, a protruding section and a fixed groove section, the protruding section is an inclined block, a cambered surface fixed groove is arranged on the fixed groove section, a valve rod oil way is arranged in the valve rod, one end of the valve rod oil way is communicated with the inner cavity of the valve body, and the other end of the valve rod oil way is communicated with the stoppers.
For better reset buffering, a buffering valve sleeve is arranged on the control end cover, the control end cavity comprises a damping cavity formed by the buffering valve sleeve and the control end cover, the buffering device is arranged in the damping cavity and comprises a buffering valve core and a buffering spring, the buffering spring is arranged in the buffering valve core, a guide channel communicated with the control end cavity is arranged on the buffering valve sleeve, and a small damping hole leading to the control end and a guide hole leading to the guide channel are respectively arranged on the buffering valve core.
In order to achieve better sealing performance between the buffer valve sleeve and the operating end cover, a gasket is arranged between the buffer valve sleeve and the operating end cover.
For the better leakproofness of inner chamber, be equipped with first seal groove between manipulation end cover and the valve body, be equipped with first cushion on the first seal groove, be equipped with the second seal groove between rear end cover and the valve body, be equipped with the second cushion on the second seal groove.
In order to achieve better sealing performance of the inner cavity, a rotating shaft flat gasket which is installed in a matched mode with the operating rotating shaft and a shifting fork flat gasket which is matched with the operating shifting fork are further arranged in the operating end cavity.
In order to better install the operation rotating shaft, a fixed gasket and a clamping shaft for fixing the operation rotating shaft are arranged on the operation end cover.
In order to install the operating rotating shaft better, the valve body is also provided with a pressure regulating valve.
The high-performance control valve obtained by the invention avoids sudden pressure change of a hydraulic system and slows down the vibration of the whole equipment; the rust of internal parts is avoided, the reliability of the control valve is improved, and the control valve can be used in the severe environment with vibration and humidity for a long time; simple structure, convenient and accurate stroke of control valve rod.
Drawings
FIG. 1 is an exploded view of a high performance control valve in example 1;
FIG. 2 is a cross-sectional view of the high performance control valve of embodiment 1;
FIG. 3 is a sectional view of a high performance control valve in embodiment 2;
fig. 4 is an enlarged view at a in fig. 3;
fig. 5 is an enlarged view at B in fig. 3;
FIG. 6 is an exploded view of the high performance control valve in example 3;
FIG. 7 is a sectional view of a high performance control valve in embodiment 3;
fig. 8 is an enlarged view at C in fig. 7;
FIG. 9 is a partial exploded view of the high performance control valve in example 4;
FIG. 10 is a partial sectional view of a high performance control valve in embodiment 4;
fig. 11 is an enlarged view at D in fig. 10;
fig. 12 is an exploded view of the high performance control valve in example 5.
In the figure: the valve comprises a valve body 1, an operating end cover 2, a rear end cover 3, a valve rod 4, a valve body inner cavity 5, an operating end cavity 6, a limiting end cavity 7, an operating end 8, a limiting end 9, a buffer device 10, a rivet pin 11, an operating fork 12, an operating rotating shaft 13, an operating rod 14, a limiting spring 15, a first spring seat 16, a second spring seat 17, a bolt 18, a spring pad 19, a first sealing groove 20, a first rubber pad 21, a second sealing groove 22, a second rubber pad 23, a secondary spring limiting seat 24, a rear end cover positioning sleeve 25, a stopper 26, a ball hole 27, a ball seat 28, a first ball 29, a second ball 30, a straight section 31, a convex section 32, a cambered surface fixing groove 33, a valve rod oil path 34, a secondary limiting spring 35, a buffer valve sleeve 36, a damping cavity 37, a buffer valve core 38, a buffer spring 39, a guide channel 40, a small damping hole 41, a guide hole 42, a rotating shaft flat washer 43, a fork flat washer 44, a fixing washer 45, a clamping shaft 46, a pressure regulating valve 47 and a pressure valve 48.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example 1:
the high performance control valve described in this embodiment, as shown in fig. 1, a high performance control valve, it includes valve body 1, control end cover 2, rear end cover 3, valve rod 4, control end cover 2 sets up respectively in valve body 1 both sides with rear end cover 3 to form the inner chamber, intracavity including valve rod 4 sets up, the inner chamber includes valve body inner chamber 5, control end chamber 6, spacing end chamber 7, including stretching into control end 8 of control end cover 2, stretching into rear end cover 3's spacing end 9 on the valve rod 4 respectively, be equipped with in the control end chamber 6 with control end 8 complex buffer 10, be equipped with in the spacing end chamber 7 with spacing end 9 complex stop device, be equipped with round pin axle 11 on the control end 8, rivet the last control fork 12 that is equipped with of round pin axle 11, be equipped with the control pivot 13 on the control fork 12, be equipped with control lever 14 on the control pivot 13.
In order to limit the stroke of the valve rod 4, the limiting device comprises a limiting spring 15, a first spring seat 16 and a second spring seat 17, the first spring seat 16 is matched with the limiting end 9, the second spring seat 17 is matched with the rear end cover 3, and the limiting spring 15 is arranged between the first spring seat 16 and the second spring seat 17.
In the present embodiment, the damping device 10 is a spring.
The operating end cover 2 and the rear end cover 3 are fixed with the valve body 1 through bolts 18 and elastic cushions 19,
an oil inlet, a first oil outlet and a second oil outlet are formed in the valve body 1.
Hydraulic oil passes through the oil inlet and gets into, and drive by manipulation pivot 13 and manipulate shifting fork 12, when hydraulic oil need flow out from the second oil-out, need clockwise rotation control rod 14, it can drive valve rod 4 and move to the right to manipulate shifting fork 12, the second oil-out can be plugged up to valve rod 4, make hydraulic oil flow from first oil-out, and spacing spring 15 can compress, if manipulate pivot 13 anticlockwise rotation, then valve rod 4 moves to the right, and in the same way, if manipulate pivot 13 anticlockwise rotation, hydraulic oil can flow from the second oil-out.
If the valve rod 4 moves to the right, the limiting spring 15 is compressed until the first spring seat 16 and the second spring seat 17 contact with each other, at this time, the limiting spring 15 is not compressed any more, and therefore the first spring seat 16, the second spring seat 17 and the limiting spring 15 effectively buffer the right movement of the valve rod 4.
If the valve rod 4 moves leftwards, namely the valve rod 4 returns, the buffer device 10 is compressed, and the left movement of the valve rod 4 is effectively buffered.
The high performance control valve that this embodiment provided, when valve rod 4 moved, effectual cushion valve rod 4, hydraulic pressure change is little, and the design is exquisite, the good reliability.
Example 2:
in the high performance control valve described in this embodiment, as shown in fig. 4 and 5, in addition to the features described in embodiment 1, in order to achieve better sealing performance of the inner cavity, a first sealing groove 20 is provided between the control end cover 2 and the valve body 1, a first rubber gasket 21 is provided on the first sealing groove 20, a second sealing groove 22 is provided between the rear end cover 3 and the valve body 1, and a second rubber gasket 23 is provided on the second sealing groove 22.
According to the sealing structure of the high-performance control valve, air is isolated by the first rubber pad 21 and the second rubber pad 23, internal parts are prevented from rusting, the reliability of the control valve is improved, and the sealing structure can be used in a severe environment with vibration and humidity for a long time.
Example 3:
as shown in fig. 6 to 8, in the high performance control valve described in this embodiment, in addition to the features of embodiment 2, in order to better limit and fix the valve rod 4 to the valve rod 4, a secondary spring limiting seat 24 is provided in the first spring seat 16 and the second spring seat 17, a secondary limiting spring 35 is provided in the secondary spring limiting seat 24, a rear end cover locating sleeve 25 is sleeved outside the limiting end 9, a stopper 26 and a ball hole 27 are provided on the limiting end 9, a ball seat 28 is provided on the stopper 26, a first ball 29 matched with the secondary limiting spring 35 is provided on the ball seat 28, a second ball 30 matched with the rear end cover locating sleeve 25 is provided on the ball hole 27, the second ball 30 is tangent to the first ball 29, the inner surface of the rear end cover locating sleeve 25 sequentially includes a straight section 31, a convex section 32 and a fixed groove section, the convex section 32 is an inclined block, a cambered surface 33 is provided on the fixed groove section, an oil passage fixing groove 34 is provided in the valve rod 4, one end of the valve rod 34 is communicated with the valve body inner cavity 5, and the other end is communicated with the stopper 26.
In this embodiment, when the valve rod 4 moves rightwards, the hydraulic oil in the valve body 1 pressurizes the stopper 26 through the valve rod oil path 34, the first ball 29 is supported by the stopper 26 and moves rightwards, the auxiliary limiting spring 35 is forced to contract, the first ball 29 does not apply a force to the second ball 30 to push out the roll hole, the limiting end 9 continues to move rightwards, the second ball 30 is forced to pass through the protruding section 32 until the first spring seat 16 and the second spring seat 17 contact each other, the second ball 30 is just above the fixed groove section, the hydraulic oil in the valve body 1 reduces the pressure of the stopper 26, the auxiliary limiting spring 35 extends, the second ball 30 is pushed into the cambered surface fixed groove 33 through the first ball 29 and the stopper 26 is reset, so that the fixing of the second ball 30 to the valve rod 4 is realized, the valve rod 4 is fixed and continuously maintains a state of blocking the second oil outlet, and the hydraulic oil flows out of the first oil outlet;
when hydraulic oil is required to be switched to the second oil outlet for outflow, when the valve rod 4 moves leftwards, the hydraulic oil in the valve body 1 pressurizes the stopper 26 through the valve rod oil path 34, the first ball 29 is jacked and moves rightwards by the stopper 26, the auxiliary limiting spring 35 is forced to contract, the first ball 29 does not exert the force which is exerted on the second ball 30 to eject the rolling hole, the limiting end 9 moves leftwards continuously, the second ball 30 is forced to pass through the cambered surface fixing groove 33 and the protruding section 32 until the second ball 30 falls into the straight section 31, and therefore hydraulic oil is discharged from the second oil outlet and flows out.
The high performance control valve that this embodiment provided, spacing effectual, whole limit structure stability is good, and is not fragile, and the design is exquisite, and the fault rate is low, has effectively guaranteed the operation of normal work.
Example 4:
as shown in fig. 9 to 11, in the high performance control valve described in this embodiment, in addition to the features described in embodiment 3, for better resetting and buffering, the operating end cap 2 is provided with a buffer valve sleeve 36, the operating end chamber 6 includes a damping chamber 37 formed by the buffer valve sleeve 36 and the operating end cap 2, the buffer device 10 is disposed in the damping chamber 37, the buffer device 10 includes a buffer valve core 38 and a buffer spring 39, the buffer spring 39 is disposed in the buffer valve core 38, the buffer valve sleeve 36 is provided with a guide channel 40 communicated with the operating end chamber 6, and the buffer valve core 38 is provided with a small damping hole 41 leading to the operating end 8 and a guide hole 42 leading to the guide channel 40, respectively.
In the embodiment, when the valve rod 4 returns, that is, the operating end 8 moves towards the operating end cavity 6, the cushion sleeve valve 36 is driven to move towards the damping cavity 37, the damping small hole 41 is blocked by the operating end 8, hydraulic oil flows into the damping cavity 37 through the guide channel 40 and the guide hole 42, hydraulic oil in the damping cavity 37 flows into the operating end cavity 6 through the guide hole 42 and the guide channel 40 until the guide hole 42 exceeds the guide channel 40, that is, the cushion sleeve valve 36 cuts off the hydraulic oil channel between the guide hole 42 and the guide channel 40, hydraulic oil in the damping cavity 37 can only flow out through the damping small hole 41, because the damping small hole 41 faces towards the operating end 8, the hydraulic oil flowing out of the damping small hole 41 can block the return speed of the valve rod 4 until the valve rod 4 stops returning, and when the operating end 8 moves in the opposite direction towards the operating end cavity 6, the cushion spring 39 can eject out and reset the cushion sleeve valve, so that a movement period of the valve rod 4 is realized.
The buffer structure that resets of high performance control valve that this embodiment provided, novel structure, practical function is good, has reduced hydraulic system's pressure sudden change, has prolonged the life-span of equipment, has reduced the fault rate of equipment.
Example 5:
the high performance control valve described in this embodiment, as shown in fig. 12, has a shaft flat washer 43 fitted to the operating shaft 13 and a fork flat washer 44 fitted to the operating fork 12 in the operating end cavity for better sealing of the internal cavity, in addition to the features described in embodiment 4.
For better installation of the operating shaft 13, the operating end cap 2 is provided with a fixing washer 45 and a clamping shaft 46 for fixing the operating shaft 13.
For better sealing of the buffer valve sleeve 36 with the actuating end cap 2, a gasket 48 is provided between the buffer valve sleeve 36 and the actuating end cap 2.
For better installation of the operating shaft 13, the valve body 1 is also provided with a pressure regulating valve 47.
The sealing structure of the high-performance control valve obtained by the invention has the advantages that the operation rotating shaft 13 is more convenient to install, the integral sealing performance is better, and the pressure of hydraulic oil is conveniently adjusted through the pressure regulating valve 47.
Claims (8)
1. The high-performance control valve comprises a valve body (1), an operating end cover (2), a rear end cover (3) and a valve rod (4), and is characterized in that the operating end cover (2) and the rear end cover (3) are respectively arranged on two sides of the valve body (1) to form an inner cavity, the valve rod (4) is arranged in the inner cavity, the inner cavity comprises a valve body inner cavity (5), an operating end cavity (6) and a limiting end cavity (7), the valve rod (4) comprises an operating end (8) extending into the operating end cover (2) and a limiting end (9) extending into the rear end cover (3), a buffer device (10) matched with the operating end (8) is arranged in the operating end cavity (6), a limiting device matched with the limiting end (9) is arranged in the limiting end cavity (7), the limiting device comprises a limiting spring (15), a first spring seat (16) and a second spring seat (17), the first spring seat (16) is matched with the limiting end (9), the second spring seat (17) is matched with the rear end cover (3), the limiting spring (15) is arranged between the second spring seat (16) and a pin roll (11) is arranged on the operating end (11), the operating fork (12) is provided with an operating rotating shaft (13), and the operating rotating shaft (13) is provided with an operating lever (14).
2. The high-performance control valve according to claim 1, wherein an auxiliary spring limiting seat (24) is arranged in the first spring seat (16) and the second spring seat (17), an auxiliary limiting spring (35) is arranged in the auxiliary spring limiting seat (24), a rear end cover positioning sleeve (25) is sleeved outside the limiting end (9), a stopper (26) and a ball hole (27) are arranged on the limiting end (9), a ball seat (28) is arranged on the stopper (26), a first ball (29) matched with the auxiliary limiting spring (35) is arranged on the ball seat (28), a second ball (30) matched with the rear end cover positioning sleeve (25) is arranged on the ball hole (27), the second ball (30) is tangent to the first ball (29), the inner surface of the rear end cover positioning sleeve (25) sequentially comprises a straight section (31), a convex section (32) and a fixed groove section, the convex section (32) is an inclined block, a cambered surface (33) is arranged on the fixed groove section, an oil path (34) is arranged in the valve rod (4), and one end of the valve rod (26) is communicated with an oil path (5), and the inner cavity of the stopper (26) is communicated with the valve body.
3. The high-performance control valve according to claim 2, wherein a buffer valve sleeve (36) is arranged on the operating end cover (2), the operating end cavity (6) comprises a damping cavity (37) formed by the buffer valve sleeve (36) and the operating end cover (2), the buffer device (10) is arranged in the damping cavity (37), the buffer device (10) comprises a buffer valve core (38) and a buffer spring (39), the buffer spring (39) is arranged in the buffer valve core (38), a guide channel (40) communicated with the operating end cavity (6) is arranged on the buffer valve sleeve (36), and a small damping hole (41) leading to the operating end (8) and a guide hole (42) leading to the guide channel (40) are respectively arranged on the buffer valve core (38).
4. A high performance control valve according to claim 3, characterized in that a washer (48) is provided between the damping valve sleeve (36) and the operating end cap (2).
5. The high-performance control valve according to claim 1, 2 or 3, wherein a first sealing groove (20) is arranged between the operating end cover (2) and the valve body (1), a first rubber gasket (21) is arranged on the first sealing groove (20), a second sealing groove (22) is arranged between the rear end cover (3) and the valve body (1), and a second rubber gasket (23) is arranged on the second sealing groove (22).
6. A high performance control valve according to claim 1, 2 or 3, characterized in that a rotating shaft flat washer (43) matched with the operating rotating shaft (13) and a shifting fork flat washer (44) matched with the operating shifting fork (12) are arranged in the operating end cavity (6).
7. The high-performance control valve according to claim 2, wherein the operating end cover (2) is provided with a fixed washer (45) and a clamping shaft (46) for fixing the operating rotating shaft (13).
8. A high performance control valve according to claim 2, characterized in that the valve body (1) is further provided with a pressure regulating valve (47).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110043197.7A CN112901580B (en) | 2021-01-13 | 2021-01-13 | High-performance control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110043197.7A CN112901580B (en) | 2021-01-13 | 2021-01-13 | High-performance control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112901580A CN112901580A (en) | 2021-06-04 |
| CN112901580B true CN112901580B (en) | 2023-03-24 |
Family
ID=76112782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110043197.7A Active CN112901580B (en) | 2021-01-13 | 2021-01-13 | High-performance control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112901580B (en) |
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| DE202005009670U1 (en) * | 2005-06-17 | 2005-09-01 | Sieber, Dieter | Pneumatic drive muffler, has pressure sensor that produces warning signal and switches off pneumatic drive when impact pressure within cavity increased due to increased contamination of muffler reaches predetermined limit pressure |
| CN101469726A (en) * | 2007-12-29 | 2009-07-01 | 上海立新液压有限公司 | Stacked compression release valve |
| CN102032384A (en) * | 2010-09-10 | 2011-04-27 | 西安航天远征流体控制股份有限公司 | Pneumatic pulse valve capable of continuously and automatically opening and closing |
| CN102330713A (en) * | 2011-09-21 | 2012-01-25 | 杭州萧山叉车配件有限公司 | Marine gearbox inching hydraulic control valve |
| CN103089738A (en) * | 2013-02-04 | 2013-05-08 | 陕西航天动力高科技股份有限公司 | Straight line walking valve and controlling system achieving excavator straight line walking |
| CN203384354U (en) * | 2013-07-03 | 2014-01-08 | 山东博士乐液压有限公司 | Gearbox variable control valve for large-tonnage |
| CN108050119A (en) * | 2017-12-29 | 2018-05-18 | 常熟华威履带有限公司 | A kind of excavator buffer overflow valve |
| CN109162979A (en) * | 2018-11-05 | 2019-01-08 | 青州博信华盛液压科技有限公司 | The integrated automatic used with tractor multi-way valve for jumping bit divider function |
-
2021
- 2021-01-13 CN CN202110043197.7A patent/CN112901580B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202005009670U1 (en) * | 2005-06-17 | 2005-09-01 | Sieber, Dieter | Pneumatic drive muffler, has pressure sensor that produces warning signal and switches off pneumatic drive when impact pressure within cavity increased due to increased contamination of muffler reaches predetermined limit pressure |
| CN101469726A (en) * | 2007-12-29 | 2009-07-01 | 上海立新液压有限公司 | Stacked compression release valve |
| CN102032384A (en) * | 2010-09-10 | 2011-04-27 | 西安航天远征流体控制股份有限公司 | Pneumatic pulse valve capable of continuously and automatically opening and closing |
| CN102330713A (en) * | 2011-09-21 | 2012-01-25 | 杭州萧山叉车配件有限公司 | Marine gearbox inching hydraulic control valve |
| CN103089738A (en) * | 2013-02-04 | 2013-05-08 | 陕西航天动力高科技股份有限公司 | Straight line walking valve and controlling system achieving excavator straight line walking |
| CN203384354U (en) * | 2013-07-03 | 2014-01-08 | 山东博士乐液压有限公司 | Gearbox variable control valve for large-tonnage |
| CN108050119A (en) * | 2017-12-29 | 2018-05-18 | 常熟华威履带有限公司 | A kind of excavator buffer overflow valve |
| CN109162979A (en) * | 2018-11-05 | 2019-01-08 | 青州博信华盛液压科技有限公司 | The integrated automatic used with tractor multi-way valve for jumping bit divider function |
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| Publication number | Publication date |
|---|---|
| CN112901580A (en) | 2021-06-04 |
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