CN108278234B - Plug-in rotary buffer valve - Google Patents
Plug-in rotary buffer valve Download PDFInfo
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- CN108278234B CN108278234B CN201810045910.XA CN201810045910A CN108278234B CN 108278234 B CN108278234 B CN 108278234B CN 201810045910 A CN201810045910 A CN 201810045910A CN 108278234 B CN108278234 B CN 108278234B
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- oil port
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- valve core
- pressure
- oil
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/20—Control systems or devices for non-electric drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/84—Slewing gear
- B66C23/86—Slewing gear hydraulically actuated
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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
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
- F15B2013/004—Cartridge valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Valves (AREA)
Abstract
The invention provides a plug-in mounting type rotary buffer valve, which comprises: the valve body is provided with an oil port A and an oil port B; the main valve core is arranged in the valve body, and a first circulation channel communicated with the oil port A and a second circulation channel communicated with the oil port B are arranged on the main valve core; a valve seat connected within the main poppet; one end of the threaded sleeve is fixedly connected with one end of the valve body, which is far away from the oil port A, and an oil port T is arranged on one side, which is far away from the oil port A, of the threaded sleeve port of the threaded sleeve; the first elastic piece is arranged between the threaded sleeve and the valve seat; one end of the pilot valve core is connected to the screw sleeve port in a pressing mode to block the oil port T, the other end of the pilot valve core penetrates through the screw sleeve and the first elastic piece to enter the valve seat, and a gap circulation channel is formed between the pilot valve core and the valve seat. The plug-in mounting type rotary buffer valve is simpler and more compact in structure, more convenient to machine and lower in cost.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a plug-in type rotary buffer valve which is mainly applied to small cranes, hydraulic cranes, rotary mechanisms and the like.
Background
In engineering machinery, a swing mechanism is generally provided to improve the working efficiency and the maneuverability of the whole machine. For the automobile crane, the slewing mechanism is indispensable. The load inertia of the automobile crane is large during rotation, the starting and braking are frequent, and the working condition is severe, so that the hydraulic system of the automobile crane is required to work reliably, and large pressure impact cannot be generated particularly during the rotation starting and braking.
The prior art generally prevents overload by providing a rotary cushion valve. The rotary buffer valve of the medium-and-small-tonnage hydraulic automobile crane on the market at present mainly has two modes: one adopts double overflow valves connected in parallel at two ends of the rotary motor, and the other adopts four check valves and a pilot operated overflow valve to form a bridge circuit; in the starting and braking processes, the closed high-pressure oil overflows through the overflow valve, and the two directions are enabled to act. However, the two rotary cushion valves are composed of a plurality of valve members, have large volume and high cost, and are not suitable for being widely used on small cranes.
Disclosure of Invention
Aiming at part or all of the technical problems in the prior art, the invention provides a plug-in rotary buffer valve which is simpler and more compact in structure, more convenient to process and lower in cost.
In order to achieve the above object, the present invention provides a cartridge type rotary cushion valve having the following structure, including:
the valve body is provided with an oil port A and an oil port B;
the main valve core is arranged in the valve body, and a first circulation channel communicated with the oil port A and a second circulation channel communicated with the oil port B are arranged on the main valve core;
a valve seat connected within the main poppet;
one end of the threaded sleeve is fixedly connected with one end of the valve body, which is far away from the oil port A, and an oil port T is arranged on one side, which is far away from the oil port A, of the threaded sleeve port of the threaded sleeve;
the first elastic piece is arranged between the threaded sleeve and the valve seat;
one end of the pilot valve core is connected to the screw sleeve port in a pressing mode to block the oil port T, the other end of the pilot valve core penetrates through the screw sleeve and the first elastic piece to enter the valve seat, and a clearance circulation channel is formed between the pilot valve core and the valve seat;
the screw sleeve is also provided with a control mechanism for controlling the opening pressure of the pilot valve core; when the pressure of the oil port A or the oil port B is greater than the preset pressure of the control mechanism, the pilot valve core is jacked open, oil enters the threaded sleeve through the first circulation passage or the second circulation passage through the gap circulation passage and overflows from the oil port T, and the main valve core opens the buffer.
In the invention, the clearance flow channel is arranged to play a role in damping and ensuring the guide valve core to move stably. The overflow from the oil port A or the oil port B to the oil port T and the buffering between the oil port A and the oil port B are realized through the arrangement of the main valve core, the valve seat, the threaded sleeve, the first elastic piece and the pilot valve core. In addition, because a combined structure of a plurality of check valves and overflow valves is not needed in the invention, and bidirectional overload buffering can be realized through one valve body, the structure is simpler and more compact, the processing is more convenient, and the cost is lower.
In one embodiment, the first circulation passage includes a first axial hole communicating with the oil port a and a first trumpet hole communicating with the first axial hole, and the first trumpet hole is provided with a first reverse blocking mechanism.
In one embodiment, the second flow channel comprises a first radial hole communicated with the oil port B and a second flared hole communicated with the first radial hole, and the second flared hole is provided with a second reverse blocking mechanism.
In one embodiment, the outer portion of the main valve core corresponding to the portion of the oil port B is a stepped inward-recessed structure, the inner portion of the main valve core corresponding to the portion of the oil port B is an inclined surface, a protrusion is disposed on one surface of the valve seat facing the first flow passage and the second flow passage, and a gap is formed between an outlet surface of the second bell-shaped hole and the valve seat.
In one embodiment, the pilot valve core comprises a conical portion, a sealing block, a first cylindrical portion, a first sliding connection portion, a second cylindrical portion and a second sliding connection portion which are connected in sequence, the threaded sleeve opening is in a conical structure, a gap is reserved between the first cylindrical portion and the threaded sleeve opening, the diameter of the sealing block is larger than that of the threaded sleeve opening, the diameter of the first sliding connection portion and that of the second sliding connection portion are larger than that of the second cylindrical portion, and a gap flow channel of 0.05mm-1mm is formed between the first sliding connection portion and the valve seat and between the second sliding connection portion and the valve seat.
In one embodiment, the valve seat and the thread insert are provided with protrusions extending in opposite directions on opposite surfaces thereof, and two ends of the first elastic member are respectively sleeved on the protrusions.
In one embodiment, the control mechanism comprises a second elastic part, an adjusting screw rod and a lock nut, one end of the adjusting screw rod is inserted into the screw sleeve and is in threaded connection with the screw sleeve, the other end of the adjusting screw rod is connected with the lock nut, the lock nut abuts against the outer surface of one end, away from the pilot valve core, of the screw sleeve, one end of the second elastic part abuts against the pilot valve core, and the other end of the second elastic part abuts against the inner cavity surface of the adjusting screw rod.
In one embodiment, the opening pressure of the pilot valve core is controlled by adjusting the pre-pressing force pressed on the pilot valve core by adjusting the adjusting screw and the locking nut.
In one embodiment, when the pressure of the oil port a is high, the pressure of the oil port B is low, and the pressure of the oil port a is greater than the opening pressure of the control mechanism, part of oil of the oil port a flows to the oil port T through the first circulation passage and the clearance circulation passage to overflow; the main valve core is opened under the action of pressure difference, and oil flows from the oil port A to the oil port B to form buffering.
In one embodiment, when the pressure of the oil port B is high, the pressure of the oil port a is low, and the pressure of the oil port B is greater than the opening pressure of the control mechanism, the oil of the oil port B flows to the oil port T through the second circulation passage and the clearance circulation passage. The main valve core is opened under the action of pressure difference, and oil flows from the oil port B to the oil port A to form buffering.
Compared with the prior art, the plug-in mounting type rotary buffer valve has the advantages that:
according to the invention, the overload buffering function in two directions from the oil port A to the oil port B and from the oil port B to the oil port A is realized through the structural arrangement and the connection relation of the gap flow passage, the main valve core, the valve seat, the threaded sleeve, the first elastic piece and the pilot valve core. Compared with the prior art, the complicated problem of arrangement and pipeline connection caused by connection of a stack of valve bodies is reduced. And only one valve body is needed, so that the structure is more compact, and the cost is greatly reduced. In addition, the valve body structure and the valve core are not complex, so that the valve is convenient to process. Can be better suitable for working conditions of small cranes, hydraulic cranes, swing mechanisms and the like.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:
FIG. 1 shows a schematic diagram of one embodiment of a cartridge type rotary cushion valve of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is clear that the described embodiments are only a part of the embodiments of the invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.
The inventor notices in the invention process that in the prior art, a rotary buffer valve is generally formed by a plurality of valve members to prevent overload, so that the structure is larger in size and higher in cost, and the rotary buffer valve is not suitable for being widely used on small cranes.
In view of the above disadvantages, an embodiment of the present invention proposes a cartridge type rotary cushion valve, and is explained below.
FIG. 1 illustrates one embodiment of a cartridge type rotary cushion valve of the present invention. In this embodiment, the cartridge type rotary cushion valve of the present invention mainly includes: valve body 1, main valve element 2, valve seat 4, pilot valve element 6, first elastic component 5 and swivel nut 8. The oil port A and the oil port B are arranged at the lower end of the valve body 1, the oil port A is arranged in the axial direction of the valve body 1, and the oil port B is arranged in the radial direction. The main valve core 2 is arranged in the valve body 1, the lower end of the main valve core 2 is abutted against a valve port 1.1 of the valve body 1, and an oil port A and an oil port B are separated before the main valve core 2 is opened. In addition, the main valve element 2 is provided with a first flow passage communicating with the port a and a second flow passage communicating with the port B. The upper part of the valve body 1 is connected with a threaded sleeve 8, in other words, the lower end of the threaded sleeve 8 is fixedly connected with the valve body 1. The upper portion that the swivel nut 8 is located swivel nut mouth 8.1 is equipped with hydraulic fluid port T, and pilot valve core 6 is connected with swivel nut 8, and the upper end crimping of pilot valve core 6 cuts off hydraulic fluid port T on swivel nut mouth 8.1, and in the lower extreme of pilot valve core 6 passed swivel nut 8, first elastic component 5 and got into disk seat 4, be formed with gapped circulation passageway between pilot valve core 6 and the disk seat 4. In addition, the upper part of the screw sleeve 8 positioned at the screw sleeve opening 8.1 is also provided with a control mechanism for controlling the opening pressure of the pilot valve core 6. When the pressure of the oil port A or the oil port B is higher and is greater than the preset pressure of the control mechanism, the pilot valve core 6 is jacked open, and oil enters the threaded sleeve 8 through the first circulation channel or the second circulation channel via the gap circulation channel and overflows from the oil port T.
In one embodiment, the first flow channel mainly includes a first axial hole 2.1 communicating with the oil port a and a first flared hole 2.2 communicating with the first axial hole 2.1, and the first flared hole 2.2 is provided with a first reverse blocking mechanism 2.3 opening upward. The first reverse stopping mechanism 2.3 can be a steel ball.
In one embodiment, the second flow channel mainly includes a first radial hole 2.4 communicating with the oil port B and a second flared hole 2.5 communicating with the first radial hole 2.4, and the second flared hole 2.5 is provided with a second reverse blocking mechanism 2.6. The second reverse stopping mechanism 2.6 can be a steel ball.
In one embodiment, the outer portion (the lower end outer portion in fig. 1) of the main valve element 2 corresponding to the oil port B is a stepped inward recessed structure. The inner part of the main valve element 2 corresponding to the oil port B (the lower end in fig. 1) is an inclined surface, one surface (the lower end surface in fig. 1) of the valve seat 4 facing the first flow passage and the second flow passage is provided with a downward convex bump, and a gap 2.7 is formed between the outlet surface of the second flared hole 2.5 and the valve seat 4.
In one embodiment, the pilot valve element 6 mainly comprises a cone-shaped portion, a sealing block 6.1, a first cylindrical portion, a first sliding connection portion, a second cylindrical portion and a second sliding connection portion, which are connected in sequence. The screw sleeve opening 8.1 of the screw sleeve 8 is in a conical structure, a gap is reserved between the first cylindrical part and the screw sleeve opening 8.1, and the diameter of the sealing block 6.1 is larger than that of the screw sleeve opening 8.1, so that the pilot valve core 6 can downwards seal the screw sleeve opening 8.1 through the sealing block 6.1. The diameter of the first sliding connection part and the diameter of the second sliding connection part are both larger than the diameter of the second cylindrical part, and a clearance flow channel with the radial width of 0.05mm-1mm is formed between the first sliding connection part and the valve seat 4. The gap flow channel may be formed by a gap fit, or may be formed by a strip-shaped gap machined on the first sliding connection portion and the second sliding connection portion.
In a preferred embodiment, the upper end face of the valve seat 4 is provided with a first convex part 4.1, the lower end face of the screw sleeve 8 is provided with a second convex part 8.2, the first convex part 4.1 and the second convex part 8.2 are respectively arranged on the face of the valve seat 4 opposite to the screw sleeve 8, and the first convex part 4.1 and the second convex part 8.2 are oppositely arranged. The upper end of the first elastic part 5 is sleeved on the second convex part 8.2, and the lower end of the first elastic part 5 is sleeved on the first convex part 4.1. A control chamber 3 is formed between the upper portion of the valve body 1, the lower portion of the threaded sleeve 8, the upper portion of the main valve element 2, and the valve seat 4.
In one embodiment, the control mechanism mainly comprises the second elastic member 7, the adjusting screw 9 and the lock nut 10. The lower end of the adjusting screw 9 is inserted into the threaded sleeve 8 and is in threaded connection with the threaded sleeve 8, the upper end of the adjusting screw 9 is connected with a locking nut 10, the locking nut 10 abuts against the outer surface of the upper end of the threaded sleeve 8, the lower end of the second elastic part 7 abuts against the pilot valve core 6, and the upper end of the second elastic part 7 abuts against the surface of the inner cavity of the adjusting screw 9.
In one embodiment, the pre-pressing force pressed on the pilot valve core 6 can be adjusted by adjusting the adjusting screw 9 and the lock nut 10, so that the opening pressure of the pilot valve core 6 is controlled.
In one embodiment, when the pressure of the oil port a is high, the pressure of the oil port B is low, and the pressure of the oil port a is greater than the opening pressure of the control mechanism or the acting force of the second elastic element 7, part of the oil port a flows to the oil port T through the first flow passage and the gap flow passage to overflow; the main valve core is opened under the action of pressure difference, and oil flows from the oil port A to the oil port B to form buffering.
In one embodiment, when the pressure of the port B is high and the pressure of the port a is low, and the pressure of the port B is greater than the opening pressure of the control mechanism or the acting force of the second elastic member 7, the oil of the port B flows to the port T through the second flow passage and the gap flow passage. The main valve core 2 is opened under the action of pressure difference, and oil flows from the oil port B to the oil port A to form buffering.
In a preferred embodiment, the working principle of the invention is as follows:
the pilot valve core 6 is arranged in an inner hole of the valve seat 4 in a sliding mode, a cylinder of the pilot valve core 6 is directly in clearance fit with the inner hole of the valve seat 4, the clearance is about 0.05mm-0.1mm, and the clearance can play a damping role and can also guarantee the stable movement of the pilot valve core 6.
When the oil port a is in a high pressure state and the oil port B is in a low pressure state, the pressure of the oil port a flows through the first axial hole 2.1 and the first bell mouth 2.2, the first reverse blocking mechanism 2.3 is pushed upwards to open the valve port, and then the oil flows into the control chamber 3 through the direct gap between the sliding connection part of the pilot valve core 6 and the inner hole of the valve seat 4, if the pressure of the oil port a rises to exceed the pressure set by the second elastic element 7, the oil in the control chamber 3 pushes the pilot valve core 6 to move upwards, the oil in the control chamber 3 flows to the oil port T through the screw sleeve opening 8.1, the main valve core 2 is opened under the action of the pressure difference generated by the flowing oil, and the oil of the oil port a flows into the oil port B.
When the oil port B is at a high pressure and the oil port a is at a low pressure, the pressure of the oil port B pushes the second reverse cut-off mechanism 2.6 upward through the first radial hole 2.4 and the second bell mouth 2.5 to open the valve port, and then flows into the control chamber 3 through a gap between the sliding connection part of the pilot valve core 6 and the inner hole of the valve seat 4. If the pressure of the oil port B rises and exceeds the pressure set by the second spring 7, the oil in the control cavity 3 pushes the pilot valve core 6 to move upwards, the oil in the control cavity 3 flows to the oil port T through the screw sleeve opening 8.1, the main valve core 2 is opened under the action of pressure difference generated by the flowing oil, and the oil in the oil port B flows into the oil port A to play a buffering role.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.
Claims (6)
1. A cartridge type rotary cushion valve, comprising:
the valve body is provided with an oil port A and an oil port B;
the main valve core is arranged in the valve body, and a first circulation channel communicated with the oil port A and a second circulation channel communicated with the oil port B are arranged on the main valve core; the first circulation channel comprises a first axial hole communicated with the oil port A and a first horn hole communicated with the first axial hole, and a first reverse stopping mechanism is arranged on the first horn hole; the second circulation channel comprises a first radial hole communicated with the oil port B and a second horn hole communicated with the first radial hole, and a second reverse stopping mechanism is arranged on the second horn hole;
a valve seat connected within the main poppet; the outer part of the main valve core corresponding to the oil port B is of a stepped inward concave structure, the inner part of the main valve core corresponding to the oil port B is an inclined plane, one surface of the valve seat facing the first circulation passage and the second circulation passage is provided with a convex block, and a gap is formed between the outlet surface of the second flared hole and the valve seat;
one end of the threaded sleeve is fixedly connected with one end of the valve body, which is far away from the oil port A, and an oil port T is arranged on one side, which is far away from the oil port A, of the threaded sleeve port of the threaded sleeve;
the first elastic piece is arranged between the threaded sleeve and the valve seat;
one end of the pilot valve core is connected to the screw sleeve port in a pressing mode to block the oil port T, the other end of the pilot valve core penetrates through the screw sleeve and the first elastic piece to enter the valve seat, and a clearance circulation channel is formed between the pilot valve core and the valve seat; the pilot valve core comprises a conical part, a sealing block, a first cylindrical part, a first sliding connecting part, a second cylindrical part and a second sliding connecting part which are sequentially connected, the screw sleeve opening is of a conical structure, a gap is reserved between the first cylindrical part and the screw sleeve opening, the diameter of the sealing block is larger than that of the screw sleeve opening, the diameter of the first sliding connecting part and the diameter of the second sliding connecting part are larger than that of the second cylindrical part, and a gap flow channel of 0.05mm-1mm is formed between the first sliding connecting part and the valve seat and between the second sliding connecting part and the valve seat;
the screw sleeve is also provided with a control mechanism for controlling the opening pressure of the pilot valve core; when the pressure of the oil port A or the oil port B is greater than the preset pressure of the control mechanism, the pilot valve core is jacked open, oil enters the threaded sleeve through the first circulation passage or the second circulation passage through the gap circulation passage and overflows from the oil port T, and the main valve core opens the buffer.
2. The cushion valve according to claim 1, wherein the valve seat and the threaded sleeve are provided with protrusions extending in opposite directions on opposite surfaces thereof, and both ends of the first elastic member are respectively sleeved on the protrusions.
3. The cushion valve according to claim 1, wherein the control mechanism comprises a second elastic member, an adjusting screw rod and a lock nut, one end of the adjusting screw rod is inserted into the screw sleeve and is in threaded connection with the screw sleeve, the other end of the adjusting screw rod is connected with the lock nut, the lock nut abuts against an outer surface of one end of the screw sleeve, which is far away from the pilot valve core, one end of the second elastic member abuts against the pilot valve core, and the other end of the second elastic member abuts against an inner cavity surface of the adjusting screw rod.
4. The trim valve of claim 3, wherein the pre-compression force applied to the pilot poppet is adjustable by adjusting the adjustment screw and the lock nut to control the cracking pressure of the pilot poppet.
5. The cushion valve according to any one of claims 1 to 4, wherein when the pressure of the oil port A is high, the pressure of the oil port B is low, and the pressure of the oil port A is greater than the opening pressure of the control mechanism, part of the oil port A flows to the oil port T through the first flow passage and the clearance flow passage and overflows; the main valve core is opened under the action of pressure difference, and oil flows from the oil port A to the oil port B to form buffering.
6. The cushion valve of claim 5, wherein when the pressure of the port B is high and the pressure of the port a is low, and the pressure of the port B is greater than the opening pressure of the control mechanism, the oil of the port B flows to the port T through the second flow passage and the clearance flow passage, the main valve element opens under the action of the pressure difference, and the oil flows from the port B to the port a to form the cushion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810045910.XA CN108278234B (en) | 2018-01-17 | 2018-01-17 | Plug-in rotary buffer valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810045910.XA CN108278234B (en) | 2018-01-17 | 2018-01-17 | Plug-in rotary buffer valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108278234A CN108278234A (en) | 2018-07-13 |
| CN108278234B true CN108278234B (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810045910.XA Active CN108278234B (en) | 2018-01-17 | 2018-01-17 | Plug-in rotary buffer valve |
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| CN (1) | CN108278234B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058208B (en) * | 2018-10-17 | 2020-05-22 | 浙江奥诗柯流体控制股份有限公司 | Buffer overflow valve |
| CN109162977B (en) * | 2018-10-19 | 2020-08-28 | 湖北江威智能汽车股份有限公司 | Rotary cushion valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB901061A (en) * | 1958-12-02 | 1962-07-11 | Von Roll Ag | Improvements in or relating to safety valves |
| CN201526552U (en) * | 2009-09-30 | 2010-07-14 | 浙江大学宁波理工学院 | Plug-in pilot relief valve |
| CN203879834U (en) * | 2014-05-16 | 2014-10-15 | 浙江华益机械有限公司 | Hydraulic valve with vibration and noise reduction function |
| CN105952703B (en) * | 2016-06-22 | 2017-11-10 | 盐城瑞德石化机械有限公司 | Thread cartridge balanced valve |
| CN205876839U (en) * | 2016-08-04 | 2017-01-11 | 华侨大学 | Proportion overflow choke valve |
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Effective date of registration: 20201103 Address after: 236000 West Side of Fuqiang Road, Yingdong Economic Development Zone, Fuyang City, Anhui Province Applicant after: ANHUI SHIFENG OIL PRESSURE TECHNOLOGY Co.,Ltd. Address before: 315000 No. 510 Chuangyuan Road, Ningbo National High-tech Zone, Zhejiang Province Applicant before: Shao Likun |
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