CN109611401B - Overload oil supplementing valve - Google Patents
Overload oil supplementing valve Download PDFInfo
- Publication number
- CN109611401B CN109611401B CN201811579428.0A CN201811579428A CN109611401B CN 109611401 B CN109611401 B CN 109611401B CN 201811579428 A CN201811579428 A CN 201811579428A CN 109611401 B CN109611401 B CN 109611401B
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- port
- overflow
- way
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 25
- 239000003921 oil Substances 0.000 claims abstract description 172
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 238000004080 punching Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009469 supplementation Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses an overload oil supplementing valve, which comprises a valve block, an overflow valve and four one-way valves, wherein the overflow valve and the four one-way valves are arranged in the valve block, two oil ports and an overflow port are formed in the valve block, the two oil ports are in one-to-one correspondence with the positions of two valve ports on an oil port mounting platform of a superposition type balance valve, and any one of the two oil ports is a high-pressure side oil port and the other one is a low-pressure side oil port; the overload protection function is realized by utilizing the 3 rd one-way valve and the overflow valve or the 4 th one-way valve and the overflow valve, the function of supplementing hydraulic oil is realized by utilizing the 2 nd one-way valve or the 1 st one-way valve, and the overload protection function and the function of supplementing hydraulic oil are integrated on the overload oil supplementing valve, so that the integration of the valve is improved; the overload oil supplementing valve is directly additionally arranged on the oil port mounting platform of the superposition type balance valve, so that the overload oil supplementing valve is convenient to mount and saves mounting space; no additional pipeline is needed, so that not only are various costs caused by the pipeline saved, but also the energy consumption is reduced.
Description
Technical Field
The invention relates to a hydraulic valve, in particular to an overload oil supplementing valve.
Background
In a drum hydraulic mechanical system such as an anchor machine and a winch in the industries such as ship hoisting and the like, in order to prevent danger caused by sudden downward sliding of a heavy object, a balance valve is usually added in the drum hydraulic mechanical system and used for buffering the downward sliding amount of the heavy object, and the common balance valve comprises a superposition balance valve and a plug-in balance valve; in order to ensure that the pressure of an oil way is at a safe value, an overload valve is usually added in a reel hydraulic mechanical system; in order to supplement part of the sucked oil in the oil way, an oil supplementing valve is usually added in the reel hydraulic mechanical system.
However, one or more valves of the balance valve, the overload valve and the oil supplementing valve are additionally arranged and connected through pipelines, so that the occupied space of the pipelines is large, the installation difficulty is high, and the sealing performance requirement is high; the pipeline is complex and long, so that the cost of the pipeline, the labor cost for laying the pipeline and the cost for replacing the pipeline by ageing the pipeline are increased, and the energy consumption is high; the balance valve, the overload valve, the oil supplementing valve and the corresponding pipelines are added by customers under the demand, so that potential safety hazards exist.
Disclosure of Invention
The invention aims to solve the technical problem of providing an overload oil supplementing valve which integrates an overload protection function and an automatic hydraulic oil supplementing function, and has the advantages of high integration, small volume and convenient installation.
The technical scheme adopted for solving the technical problems is as follows: the overload oil supplementing valve is characterized by comprising a valve block, an overflow valve and four one-way valves, wherein the overflow valve and the four one-way valves are arranged in the valve block, two oil ports and an overflow port are formed in the valve block, the two oil ports correspond to the positions of two valve ports on an oil port mounting platform of the superposition balance valve one by one, and any one of the two oil ports is a high-pressure side oil port and the other one is a low-pressure side oil port;
when the hydraulic oil port 1 is a high-pressure side hydraulic oil port and the hydraulic oil port 2 is a low-pressure side hydraulic oil port, and when the pressure of a working oil way of an application system is overloaded, the valve port corresponding to the hydraulic oil port 1 on an oil port mounting platform of the overlapped balance valve discharges excessive hydraulic oil, and the excessive hydraulic oil overflows after passing through the hydraulic oil port 1, the check valve 3, the overflow valve and the overflow port, so that the pressure of the working oil way of the application system is ensured to be kept at a set safety value; when negative pressure occurs in a working oil way of the application system due to the downward sliding of a heavy object, hydraulic oil passes through the overflow port, the 2 nd one-way valve and the 2 nd oil port and then enters through a valve port corresponding to the 2 nd oil port on an oil port mounting platform of the overlapped balance valve;
when the hydraulic oil port 2 is a high-pressure side hydraulic oil port and the hydraulic oil port 1 is a low-pressure side hydraulic oil port, and when the pressure of a working oil way of an application system is overloaded, a valve port corresponding to the hydraulic oil port 2 on an oil port mounting platform of the overlapped balance valve discharges excessive hydraulic oil, and the excessive hydraulic oil overflows after passing through the hydraulic oil port 2, the one-way valve 4, the overflow valve and the overflow port, so that the pressure of the working oil way of the application system is ensured to be kept at a set safety value; when negative pressure is generated in a working oil way of the application system due to the fact that a heavy object slides downwards, hydraulic oil passes through the overflow port, the 1 st one-way valve and the 1 st oil port and then enters through a valve port corresponding to the 1 st oil port on an oil port mounting platform of the overlapped balance valve.
The oil port 1 is connected with the check valve 1 and the check valve 3 respectively, the oil inlet of the overflow valve is connected with the check valve 3 and the check valve 4 respectively, the oil outlet of the overflow valve is connected with the check valve 1 and the check valve 2 and the overflow port 2 respectively, and the oil port 2 is connected with the check valve 2 and the check valve 4 respectively.
The valve block in set up six and cross the flow channel, 1 st the hydraulic fluid port through 1 the flow channel with 1 st the output of check valve intercommunication, 1 st the output of check valve through 2 nd the flow channel with 3 rd the input of check valve intercommunication, the oil inlet of overflow valve through 3 rd the flow channel respectively with 3 rd the output of check valve and 4 th the output of check valve, the oil-out of overflow valve through 4 th the flow channel respectively with 1 st the input of check valve and 2 nd the input of check valve and overflow mouth, 2 nd the hydraulic fluid port through 5 th the flow channel with 2 nd the output of check valve intercommunication, 2 nd the output of check valve through 6 th the flow channel with 4 th the input of check valve. Here, a specific connection structure between the two oil ports, the overflow port, the overflow valve and the four check valves is defined, and although the oil outlet of the overflow valve is respectively communicated with the input end of the 1 st check valve and the input end of the 2 nd check valve through the 4 th overflow channel, hydraulic oil overflowed by the overflow valve can only pass through the check valve at the low pressure side, namely the 1 st check valve or the 2 nd check valve, so that the hydraulic oil fed only passes through the 1 st check valve or the 2 nd check valve when the oil feeding is needed by an application system.
The overflow port is respectively communicated with an oil return path of the application system and an external oil tank. The overflowed hydraulic oil can be recycled, so that the hydraulic oil can directly enter an oil return path of the application system through a pipeline and also can directly enter an external oil tank for recycling, and the hydraulic oil required by the application system can be supplemented through the external oil tank when the application system needs oil supplementation.
And sealing rings are arranged on the periphery of the two oil ports, so that the two oil ports are in sealing connection with an oil port mounting platform of the superposition type balance valve. The sealing ring is additionally arranged to ensure that the overload oil compensating valve is additionally arranged on an oil port mounting platform of the superposition type balance valve and does not leak oil.
The overflow valve is a threaded plug-in type direct-acting overflow valve, and the one-way valve is a plug-in type one-way valve. The thread plug-in type direct-acting overflow valve and the plug-in type one-way valve are adopted, so that the overflow valve and the one-way valve are more convenient to install.
The overflow valve is arranged in the upper right region of the valve block, the 1 st one-way valve is arranged in the lower left region of the valve block, the 2 nd one-way valve is arranged in the lower right region of the valve block, the 3 rd one-way valve is arranged in the left top region of the valve block, the 4 th one-way valve is arranged in the right top region of the valve block, the 1 st one-way valve is arranged on the left bottom of the valve block, the 2 nd one-way valve is arranged on the right bottom of the valve block, and the overflow port is arranged on the back of the valve block. The arrangement of the overflow valve, the four one-way valves, the two oil ports and the overflow port is limited, so that the overload oil supplementing valve is more reasonable and compact in structure and smaller in size.
The six through-flow channels are formed by punching process holes in the valve block to be matched with plugs. Because only longitudinal and transverse process holes can be drilled in the valve block, a plurality of through-flow channels are formed by utilizing the process holes and additionally arranging plugs on the ports of the process holes.
Compared with the prior art, the invention has the advantages that:
1) The overload protection function is realized by utilizing the 3 rd one-way valve and the overflow valve or the 4 th one-way valve and the overflow valve, the hydraulic oil supplementing function is realized by utilizing the 2 nd one-way valve or the 1 st one-way valve, and the overload protection function and the hydraulic oil supplementing function are integrated on the overload oil supplementing valve, so that the integration of the valve is improved.
2) The overload oil supplementing valve is directly additionally arranged on the oil port mounting platform of the superposition type balance valve, so that the overload oil supplementing valve is convenient to mount and saves mounting space.
3) No additional pipeline is needed, so that not only are various costs caused by the pipeline saved, but also the energy consumption is reduced.
4) The problem of potential safety hazard caused by the addition of clients is avoided.
5) After the overload oil supplementing valve is additionally arranged, overload protection and supplementing of hydraulic oil can be automatically realized, and safety and stability of an application system are effectively guaranteed, so that the service life and market competitiveness of the application system are improved.
Drawings
FIG. 1 is a bottom view of an overload oil replenishment valve of the present invention;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
FIG. 3 is a B-B cross-sectional view of FIG. 1;
FIG. 4 is a schematic diagram of the operation of the overload oil replenishment valve of the present invention;
fig. 5 is a schematic structural diagram of an oil port mounting platform of a stacked balancing valve.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
The invention provides an overload oil compensating valve, which comprises a valve block 1, an overflow valve 2 and four one-way valves 31, 32, 33 and 34, wherein the overflow valve 2 and the four one-way valves 31, 32, 33 and 34 are arranged in the valve block 1, two oil ports 11 and 12 and an overflow port 13 are formed in the valve block 1, the two oil ports 11 and 12 are in one-to-one correspondence with the positions of two valve ports 92 and 93 on an oil port mounting platform 91 of a superposition balance valve 9, and any one of the two oil ports 11 and 12 is a high-pressure side oil port and the other one is a low-pressure side oil port; when the working oil way pressure of an application system is overloaded, the 1 st oil port 11 is a high-pressure side oil port, and the 2 nd oil port 12 is a low-pressure side oil port, and excessive hydraulic oil is discharged from a valve port 92 corresponding to the 1 st oil port 11 on an oil port mounting platform 91 of the stacked balance valve 9, and overflows after passing through the 1 st oil port 11, the 3 rd one-way valve 33, the overflow valve 2 and the overflow port 13, so that the working oil way pressure of the application system is kept at a set safety value; when negative pressure occurs in a working oil way of the application system due to the downward sliding of a heavy object, hydraulic oil enters through an overflow port 13, a 2 nd one-way valve 32 and a 2 nd oil port 12 and then enters through a valve port 93 corresponding to the 2 nd oil port 12 on an oil port mounting platform 91 of the overlapped balance valve 9; when the 2 nd oil port 12 is a high-pressure side oil port and the 1 st oil port 11 is a low-pressure side oil port, and when the working oil way pressure of an application system is overloaded, the valve port 93 corresponding to the 2 nd oil port 12 on the oil port mounting platform 91 of the stacked balance valve 9 discharges excessive hydraulic oil, and the excessive hydraulic oil overflows after passing through the 2 nd oil port 12, the 4 th one-way valve 34, the overflow valve 2 and the overflow port 13, so that the working oil way pressure of the application system is kept at a set safety value; when negative pressure occurs in the working oil way of the application system due to the downward sliding of the heavy object, hydraulic oil passes through the overflow port 13, the 1 st one-way valve 31 and the 1 st oil port 11 and then enters through the valve port 92 corresponding to the 1 st oil port 11 on the oil port mounting platform 91 of the overlapped balance valve 9.
In this embodiment, only longitudinal and transverse process holes can be drilled in the valve block 1, so that six through-flow channels 14, 15, 16, 17, 18 and 19 are formed by using the process holes and adding plugs on the ports of the process holes, the 1 st oil port 11 is communicated with the output end of the 1 st one-way valve 31 through the 1 st through-flow channel 14, the output end of the 1 st one-way valve 31 is communicated with the input end of the 3 rd one-way valve 33 through the 2 nd through-flow channel 15, the oil inlet of the overflow valve 2 is respectively communicated with the output end of the 3 rd one-way valve 33 and the output end of the 4 th one-way valve 34 through the 3 rd through-flow channel 16, the oil outlet of the overflow valve 2 is respectively communicated with the input end of the 1 st one-way valve 31, the input end of the 2 nd one-way valve 32 and the overflow port 13 through the 4 th through-flow channel 17, the 2 nd oil port 12 is communicated with the output end of the 2 nd one-way valve 32 through the 5 th through-flow channel 18, and the output end of the 2 nd one-way valve 32 is communicated with the input end of the 4 th one-way valve 34 through the 6 th through-flow channel 19. Here, a specific connection structure between the two oil ports 11, 12, the overflow port 13, the overflow valve 2, and the four check valves 31, 32, 33, 34 is defined, and although the oil outlet of the overflow valve 2 is respectively communicated with the input end of the 1 st check valve 31 and the input end of the 2 nd check valve 32 through the 4 th overflow passage 17, hydraulic oil overflowed by the overflow valve 2 can pass through only the low-pressure side check valve, namely the 1 st check valve 31 or the 2 nd check valve 32, so that the hydraulic oil supplied passes through the 1 st check valve 31 or the 2 nd check valve 32 only when the oil supply is required by the application system.
In the present embodiment, the overflow 13 communicates with an oil return (not shown) and an external tank (not shown) of the application system, respectively. The overflowed hydraulic oil can be recycled, so that the hydraulic oil can directly enter an oil return path of the application system through a pipeline and also can directly enter an external oil tank for recycling, and the hydraulic oil required by the application system can be supplemented through the external oil tank when the application system needs oil supplementation.
In the present embodiment, the sealing rings 4 are provided around the two oil ports 11, 12, so that the two oil ports 11, 12 are sealingly connected to the oil port mounting platform 91 of the stacked balance valve 9. The sealing ring 4 is added to ensure that the overload oil compensating valve is not leaked after being additionally arranged on the oil port mounting platform 91 of the overlapped balance valve 9.
In this embodiment, the overflow valve 2 is a threaded plug-in type direct-acting overflow valve, and the four check valves 31, 32, 33, 34 are plug-in type check valves. The threaded plug-in type direct-acting overflow valve and the plug-in type one-way valve are adopted, so that the overflow valve 2 and the four one-way valves 31, 32, 33 and 34 are more convenient to install.
In this embodiment, the overflow valve 2 is installed in the right upper region of the valve block 1, the 1 st check valve 31 is installed in the left lower region of the valve block 1, the 2 nd check valve 32 is installed in the right lower region of the valve block 1, the 3 rd check valve 33 is installed in the top left region of the valve block 1, the 4 th check valve 34 is installed in the top right region of the valve block 1, the 1 st oil port 11 is opened at the bottom left side of the valve block 1, the 2 nd oil port 12 is opened at the bottom right side of the valve block 1, and the overflow port 13 is opened at the back of the valve block 1. The arrangement of the overflow valve 2, the four one-way valves 31, 32, 33, 34, the two oil ports 11, 12 and the overflow port 13 is defined, so that the structure of the overload oil compensating valve is more reasonable and compact, and the volume of the overload oil compensating valve is smaller.
When the overload oil compensating valve is installed, only the two oil ports 11 and 12 of the overload oil compensating valve are aligned with the two valve ports 92 and 93 on the oil port installation platform 91 of the superposition type balance valve 9 one by one, and then a plurality of M8 screws are used for directly connecting the overload oil compensating valve in series between the oil pipe installation flange and the oil port installation platform 91 of the superposition type balance valve 9.
Claims (6)
1. The overload oil supplementing valve is characterized by comprising a valve block, an overflow valve and four one-way valves, wherein the overflow valve and the four one-way valves are arranged in the valve block, two oil ports and an overflow port are formed in the valve block, the two oil ports correspond to the positions of two valve ports on an oil port mounting platform of the superposition balance valve one by one, and any one of the two oil ports is a high-pressure side oil port and the other one is a low-pressure side oil port;
when the hydraulic oil port 1 is a high-pressure side hydraulic oil port and the hydraulic oil port 2 is a low-pressure side hydraulic oil port, and when the pressure of a working oil way of an application system is overloaded, the valve port corresponding to the hydraulic oil port 1 on an oil port mounting platform of the overlapped balance valve discharges excessive hydraulic oil, and the excessive hydraulic oil overflows after passing through the hydraulic oil port 1, the check valve 3, the overflow valve and the overflow port, so that the pressure of the working oil way of the application system is ensured to be kept at a set safety value; when negative pressure occurs in a working oil way of the application system due to the downward sliding of a heavy object, hydraulic oil passes through the overflow port, the 2 nd one-way valve and the 2 nd oil port and then enters through a valve port corresponding to the 2 nd oil port on an oil port mounting platform of the overlapped balance valve;
when the hydraulic oil port 2 is a high-pressure side hydraulic oil port and the hydraulic oil port 1 is a low-pressure side hydraulic oil port, and when the pressure of a working oil way of an application system is overloaded, a valve port corresponding to the hydraulic oil port 2 on an oil port mounting platform of the overlapped balance valve discharges excessive hydraulic oil, and the excessive hydraulic oil overflows after passing through the hydraulic oil port 2, the one-way valve 4, the overflow valve and the overflow port, so that the pressure of the working oil way of the application system is ensured to be kept at a set safety value; when negative pressure occurs in a working oil way of the application system due to the downward sliding of a heavy object, hydraulic oil passes through the overflow port, the 1 st one-way valve and the 1 st oil port and then enters through a valve port corresponding to the 1 st oil port on an oil port mounting platform of the overlapped balance valve;
the oil port 1 is respectively connected with the check valve 1 and the check valve 3, the oil inlet of the overflow valve is respectively connected with the check valve 3 and the check valve 4, the oil outlet of the overflow valve is respectively connected with the check valve 1 and the check valve 2 and the overflow port 2, and the oil port 2 is respectively connected with the check valve 2 and the check valve 4;
the overflow valve is a threaded plug-in type direct-acting overflow valve, and the one-way valve is a plug-in type one-way valve.
2. The overload oil supplementing valve according to claim 1, wherein six through-flow channels are formed in the valve block, the 1 st oil port is communicated with the 1 st output end of the one-way valve through the 1 st through-flow channel, the 1 st output end of the one-way valve is communicated with the 3 rd input end of the one-way valve through the 2 nd through-flow channel, the oil inlet of the overflow valve is respectively communicated with the 3 rd output end of the one-way valve and the 4 th output end of the one-way valve through the 3 rd through-flow channel, the oil outlet of the overflow valve is respectively communicated with the 1 st input end of the one-way valve, the 2 nd input end of the one-way valve and the overflow port through the 4 th through-flow channel, and the 2 nd oil port is communicated with the 2 nd output end of the one-way valve through the 5 th through-flow channel, and the 2 nd output end of the one-way valve is communicated with the 4 th input end of the one-way valve through the 6 th through-flow channel.
3. An overload oil compensating valve according to claim 1 or 2 wherein the overflow is in communication with the return line of the application system and the external tank, respectively.
4. An overload oil compensating valve as claimed in claim 3, wherein sealing rings are arranged at the periphery of the two oil ports, so that the two oil ports are in sealing connection with an oil port mounting platform of the superposition type balance valve.
5. The overload oil compensating valve according to claim 1, wherein the overflow valve is installed in a right upper region of the valve block, the 1 st one-way valve is installed in a left lower region of the valve block, the 2 nd one-way valve is installed in a right lower region of the valve block, the 3 rd one-way valve is installed in a top left region of the valve block, the 4 th one-way valve is installed in a top right region of the valve block, the 1 st oil port is opened at a bottom left side of the valve block, the 2 nd oil port is opened at a bottom right side of the valve block, and the overflow port is opened at a back of the valve block.
6. The overload oil compensating valve as claimed in claim 2, wherein the six through-flow passages are formed by punching process holes in the valve block to match plugs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811579428.0A CN109611401B (en) | 2018-12-24 | 2018-12-24 | Overload oil supplementing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811579428.0A CN109611401B (en) | 2018-12-24 | 2018-12-24 | Overload oil supplementing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109611401A CN109611401A (en) | 2019-04-12 |
| CN109611401B true CN109611401B (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811579428.0A Active CN109611401B (en) | 2018-12-24 | 2018-12-24 | Overload oil supplementing valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN109611401B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11210023A (en) * | 1998-01-26 | 1999-08-03 | Hitachi Constr Mach Co Ltd | Hydraulic driving device for construction equipment |
| JP2003172307A (en) * | 2001-12-07 | 2003-06-20 | Kayaba Ind Co Ltd | Hydraulic control system |
| CN203584959U (en) * | 2013-11-04 | 2014-05-07 | 恒天九五重工有限公司 | Oil-replenishing-pressure-adjustable hydraulic oil replenishing device of rotary motors of rotary drilling rig |
| CN106545536A (en) * | 2015-09-21 | 2017-03-29 | 徐工集团工程机械股份有限公司 | Slow supply oil valve, slow supply oil system and deep drilling rig |
| CN106870499A (en) * | 2017-04-28 | 2017-06-20 | 太原科技大学 | A kind of damping buffering valve |
| CN209621748U (en) * | 2018-12-24 | 2019-11-12 | 宁波斯达弗液压传动有限公司 | A kind of overload oil compensating valve |
-
2018
- 2018-12-24 CN CN201811579428.0A patent/CN109611401B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11210023A (en) * | 1998-01-26 | 1999-08-03 | Hitachi Constr Mach Co Ltd | Hydraulic driving device for construction equipment |
| JP2003172307A (en) * | 2001-12-07 | 2003-06-20 | Kayaba Ind Co Ltd | Hydraulic control system |
| CN203584959U (en) * | 2013-11-04 | 2014-05-07 | 恒天九五重工有限公司 | Oil-replenishing-pressure-adjustable hydraulic oil replenishing device of rotary motors of rotary drilling rig |
| CN106545536A (en) * | 2015-09-21 | 2017-03-29 | 徐工集团工程机械股份有限公司 | Slow supply oil valve, slow supply oil system and deep drilling rig |
| CN106870499A (en) * | 2017-04-28 | 2017-06-20 | 太原科技大学 | A kind of damping buffering valve |
| CN209621748U (en) * | 2018-12-24 | 2019-11-12 | 宁波斯达弗液压传动有限公司 | A kind of overload oil compensating valve |
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| Publication number | Publication date |
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| CN109611401A (en) | 2019-04-12 |
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