CN106015174A - Test detection device for opening and closing characteristic and durability of safety valve - Google Patents
Test detection device for opening and closing characteristic and durability of safety valve Download PDFInfo
- Publication number
- CN106015174A CN106015174A CN201610529069.2A CN201610529069A CN106015174A CN 106015174 A CN106015174 A CN 106015174A CN 201610529069 A CN201610529069 A CN 201610529069A CN 106015174 A CN106015174 A CN 106015174A
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- China
- Prior art keywords
- valve
- oil
- detection device
- relief valve
- durability
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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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/855—Testing of fluid pressure systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a test detection device for the opening and closing characteristic and durability of a safety valve. The test detection device comprises a tested safety valve located in a multipath valve; the multipath valve further comprises a lifting reversing valve and an inclined reversing valve; an oil inlet P of the multipath valve is connected with an oil outlet of an oil pump, an oil suction opening of the oil pump is communicated with a hydraulic oil tank, and an oil returning opening T of the multipath valve is connected with an oil inlet of a first switch valve and an oil inlet of a second switch valve through a tee-joint pipe; a valve rod of the lifting reversing valve is connected with a piston rod of an air cylinder through a pin shaft, and an oil opening F of the lifting reversing valve is provided with a test loop overflow valve in a series-connection manner; when the test detection device is used for detection, a first inclined work oil opening and a second inclined work oil opening of the inclined reversing valve are sealed, the oil pump is started, and the tested safety valve is detected; and a reversing mechanism of the forklift multipath valve is used, a pneumatic unit air cylinder and the oil pump are additionally added, detection of the opening and closing characteristic and durability of the safety valve internally arranged in the multipath valve is achieved, the manufacturing cost is low, and the device is economical and practical.
Description
Technical field
The invention belongs to technical field of hydraulic pressure, be specifically related to the detection of hydraulic system relief valve.
Background technology
The relief valve effect being built in banked direction control valves of forklift hydraulic system, is to prevent hydraulic system from transshipping, and plays safety effect.Relief valve has two key properties to affect actually used performance: one is on characteristic, and another is durability；If relief valve opening feature and poor durability, causing poor to system overload protective capability, fatiguability lost efficacy；In order to meet performance requirement during user's use, overshoot relief valve, causes system sealing to lose efficacy and caused the generation of leakage of oil problem, oil pump even can be caused to damage.These two performances generally use specialty testing stand and test, and often put into relatively big, and the cycle is long.
Summary of the invention
In order to quick, realize keying characteristic and the detection of durability of relief valve in banked direction control valves simply, economically, the present invention provide a kind of simple in construction, low cost open and close characteristic and the experiment detection device of durability detection for relief valve.
Characteristic and the experiment detection device of durability is opened and closed for relief valve, wherein said relief valve is tested relief valve 5, it is positioned at banked direction control valves 4, described banked direction control valves 4 also includes lifting reversal valve 12 and inclined reversing valve 15, and banked direction control valves 4 has oil inlet P, oil return inlet T, lifting the first actuator port A1, tilts the first actuator port A2 and tilt the second actuator port B2；
The oil inlet P of banked direction control valves 4 is connected to the oil-out of oil pump 11, and the inlet port of oil pump 11 connects hydraulic oil container 1；
The oil return inlet T of banked direction control valves 4 respectively connected oil-in and the oil-in of second switch valve 7 of the first switch valve 6 by tee T；The oil-out of described first switch valve 6 is connected effusion meter 9；The oil-out of second switch valve 7 connects measuring cup 8；
The valve rod 17 of lifting reversal valve 12 is connected to the piston rod 16 of cylinder 3 by bearing pin 13；The hydraulic fluid port F series connection of lifting reversal valve 12 is provided with test loop overflow valve 2；
During for detecting, closing inclination the first actuator port A2 of inclined reversing valve 15 and tilt the second actuator port B2, starting oil pump 11 can detect tested relief valve 5.
The technical scheme limited further is as follows:
Described oil pump 11 is hydraulic oil pump, provides power source for experiment detection device.
The oil-out of oil pump 11 is provided with Pressure gauge 10, and effect is to detect the pressure of relief valve 5.
The inlet port of oil pump 11 is provided with oil filter.
The oil-out of described effusion meter 9 is provided with filter.
Described first switch valve 6 and second switch valve 7 are stop valve.
The Advantageous Effects of the present invention is embodied in following aspect:
1. the present invention utilizes the changement of forklift multi-way valve, additional pneumatic unit cylinder and an oil pump, it is achieved the keying characteristic of the relief valve built-in to banked direction control valves and the detection of endurance quality, and low cost of manufacture is economical and practical.
2. present configuration is simple, easy to operate, reliable operation.
Loop the most of the present invention can quickly detect that relief valve opens and closes characteristic, and the actually used performance in production scene is good.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram.
Sequence number in upper figure: thermometer 1, valve 2, cylinder 3, banked direction control valves 4, tested relief valve the 5, first switch valve 6, second switch valve 7, measuring cup 8, effusion meter 9, Pressure gauge 10, oil pump 11, lifting reversal valve 12, bearing pin 13, annular back oil road 14, inclined reversing valve 15, piston rod 16, valve rod 17, annular oil input channel 18.
Detailed description of the invention
Below in conjunction with the accompanying drawings, by embodiment, the present invention is further described.
Embodiment
See Fig. 1, a kind of for relief valve keying characteristic and the experiment detection device of durability, tested relief valve 5 is positioned at banked direction control valves 4, banked direction control valves 4 also includes lifting reversal valve 12 and inclined reversing valve 15, and banked direction control valves 4 has oil inlet P, oil return inlet T, lifting the first actuator port A1, tilts the first actuator port A2 and tilt the second actuator port B2.
The oil inlet P of banked direction control valves 4 is connected to the oil-out of oil pump 11, and the oil-in of oil pump 11 connects hydraulic oil container 1；Oil pump 11 is hydraulic oil pump, provides power source for experiment detection device.The oil-out of oil pump 11 is provided with Pressure gauge 10, and effect is to detect the pressure of relief valve 5；The inlet port of oil pump 11 is provided with oil filter.
The oil return inlet T of banked direction control valves 4 is respectively communicated with oil-in and the oil-in of second switch valve 7 of the first switch valve 6 by tee T；The oil-out of the first switch valve 6 is connected effusion meter 9, and the oil-out of effusion meter 9 is provided with filter, and connects hydraulic oil container 1；The oil-out of second switch valve 7 connects measuring cup 8；
The valve rod 17 of lifting reversal valve 12 is connected to the piston rod 16 of cylinder 3 by bearing pin 13；First oil-out F of lifting reversal valve 12 connects with lifting the first actuator port A1, lifts the first actuator port A1 and is connected with the entrance of test loop overflow valve 2, and the outlet of overflow valve 2 communicates with hydraulic oil container 1.
Structure about banked direction control valves 4 is described as follows:
The P mouth of banked direction control valves 4 divides two-way by internal oil passages, a road and the inlet communication of tested relief valve 5, and the outlet of relief valve 5 is communicated with banked direction control valves 4 oil return inlet T by annular back oil road 14；Another road is connected with the first interface of the entrance four-way of lifting reversal valve 12, and the second interface of four-way communicates with the first oil-in C of lifting reversal valve 12, and the 3rd interface of four-way is communicated by the second oil-in D of inlet one-way valve with lifting reversal valve 12；4th interface of four-way is connected with the entrance of inclined reversing valve 15 by annular oil input channel 18, and inclination the first actuator port A2 of inclined reversing valve 15 and inclination the second actuator port B2 blocks with screw plug in this loop.First oil return opening E of lifting reversal valve 12 communicates with annular back oil road 14.
When lifting reversal valve 12 is in middle position, the first oil-in C and the first oil return opening E connects；When lifting reversal valve 12 commutates to right position, the second oil-in D and the first oil-out F communicates.
During for detecting, close inclination the first actuator port A2 of inclined reversing valve 15 and tilt the second actuator port B2.
When carrying out the keying attribute testing of relief valve:
Before test loop starts, first the hydraulic fluid temperature in hydraulic oil container 1 is heated to test temperature.Start oil pump 11, open second switch valve 7, close the first switch valve 6, first the oil pressure relief of test loop overflow valve 2 is adjusted to higher by about 15% than the pressure upper limit value of tested relief valve 5, make to be test flow by the flow of tested relief valve 5, cylinder 3 action, the valve rod 17 of pull-out lifting reversal valve 12, commutation, to right position, reads the oil pressure relief P surveying tested relief valve 5 by Pressure gauge 10D, measured the spillway discharge of tested relief valve 5 by effusion meter 9, record data；Regulation test loop overflow valve 2, makes system gradually blood pressure lowering, when pressure is down to the clossing pressure of tested relief valve 5, is observed the spillway discharge of 1 minute of oil return inlet T by effusion meter 9, and records data；Regulate test loop overflow valve 2 again, make system gradually boost, when pressure is down to the unlatching pressure of relief valve 5, is observed the spillway discharge of 1 minute of oil return inlet T by effusion meter 9, and record data.If the range of effusion meter is the biggest, 1 minute tested relief valve 5 spillway discharge can not be accurately reflected, second switch valve 7 can cut out, first switch valve 6 is opened, regulation test loop overflow valve 2, makes system gradually blood pressure lowering, when pressure is down to the clossing pressure of tested relief valve 5, measure 1 minute spillway discharge by measuring cup 8, and record data；Regulate test loop overflow valve 2 again, make system gradually boost, when pressure is down to the unlatching pressure of relief valve 5, measures 1 minute spillway discharge by measuring cup 8, and record data.Calculate unlatching rate and the make rate of relief valve according to computing formula, i.e. complete to open and close attribute testing.
When carrying out the endurancing of relief valve:
First close test loop overflow valve 2, make to be test flow by the flow of tested relief valve 5, the commutation action of lifting reversal valve 12 is controlled, by 20 times/min frequency continuous operation lifting reversal valve (valve rod 17 of cylinder 3 air inlet pull-out lifting reversal valve 12, commutation to right position by cylinder 3；Cylinder 3 is died, lifting reversal valve 12 returns to middle position and calculates a frequency), the action frequency of record security valve, the unlatching rate of every 50,000 detection once safety valves is (according to relief valve high-class product standard-required, when commutation number of times is no less than 250,000 times, the unlatching rate of relief valve must not be less than 80%), to verify the durability of banked direction control valves relief valve.
Claims (6)
1. open and close characteristic and the experiment detection device of durability for relief valve, described relief valve is tested relief valve (5), it is positioned at banked direction control valves (4), described banked direction control valves (4) also includes lifting reversal valve (12) and inclined reversing valve (15), banked direction control valves (4) has oil inlet P, oil return inlet T, lifting the first actuator port A1, tilts the first actuator port A2 and tilt the second actuator port B2, it is characterised in that:
The oil inlet P of banked direction control valves (4) is connected to the oil-out of oil pump (11), and the inlet port of oil pump (11) connects hydraulic oil container (1)；
The oil return inlet T of banked direction control valves (4) respectively connected oil-in and the oil-in of second switch valve (7) of the first switch valve (6) by tee T；The oil-out of described first switch valve (6) is connected effusion meter (9)；The oil-out of second switch valve (7) connects measuring cup (8)；
The valve rod (17) of lifting reversal valve (12) is connected to the piston rod (16) of cylinder (3) by bearing pin (13)；The hydraulic fluid port F series connection of lifting reversal valve (12) is provided with test loop overflow valve (2)；
During for detecting, closing inclination the first actuator port A2 of inclined reversing valve (15) and tilt the second actuator port B2, starting oil pump (11) can detect tested relief valve (5).
The experiment detection device detected for relief valve keying characteristic and durability the most according to claim 1, it is characterised in that: described oil pump (11) is hydraulic oil pump, provides power source for experiment detection device.
The experiment detection device detected for relief valve keying characteristic and durability the most according to claim 1, it is characterised in that: the oil-out of oil pump (11) is provided with Pressure gauge (10), and effect is to detect the pressure of relief valve (5).
The experiment detection device detected for relief valve keying characteristic and durability the most according to claim 1, it is characterised in that: the inlet port of oil pump (11) is provided with oil filter.
The experiment detection device detected for relief valve keying characteristic and durability the most according to claim 1, it is characterised in that: the oil-out of described effusion meter (9) is provided with filter.
The experiment detection device detected for relief valve keying characteristic and durability the most according to claim 1, it is characterised in that: described first switch valve (6) and second switch valve (7) are stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610529069.2A CN106015174A (en) | 2016-07-06 | 2016-07-06 | Test detection device for opening and closing characteristic and durability of safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610529069.2A CN106015174A (en) | 2016-07-06 | 2016-07-06 | Test detection device for opening and closing characteristic and durability of safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106015174A true CN106015174A (en) | 2016-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610529069.2A Pending CN106015174A (en) | 2016-07-06 | 2016-07-06 | Test detection device for opening and closing characteristic and durability of safety valve |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374203A (en) * | 2011-10-31 | 2012-03-14 | 中联重科股份有限公司 | hydraulic control circuit |
| CN203202304U (en) * | 2013-03-27 | 2013-09-18 | 浙江海宏液压科技股份有限公司 | Multifunctional forklift multi-way valve |
| CN103900810A (en) * | 2014-04-16 | 2014-07-02 | 江苏二马液压元件有限公司 | Durability test table for safety valve |
| CN204003792U (en) * | 2014-08-20 | 2014-12-10 | 常德中联重科液压有限公司 | Reversing valve durability test system |
| CN204312460U (en) * | 2014-12-05 | 2015-05-06 | 宁波恒力液压股份有限公司 | Based on the oil hydraulic pump of parallel power-saving technology and the endurance test hydraulic pressure installation of relief valve |
| CN105084261A (en) * | 2015-08-13 | 2015-11-25 | 安徽合力股份有限公司 | Dual-pump confluent energy-saving type forklift hydraulic system |
| CN204824047U (en) * | 2015-07-02 | 2015-12-02 | 杭叉集团股份有限公司 | Fork truck multiple unit valve with second grade pressure control |
| CN105157971A (en) * | 2015-08-27 | 2015-12-16 | 无锡阳工机械制造有限公司 | Hydraulic multipath reversing valve delivery test method |
| CN205841372U (en) * | 2016-07-06 | 2016-12-28 | 安徽合力股份有限公司 | Characteristic and the experiment detection device of durability is opened and closed for relief valve |
-
2016
- 2016-07-06 CN CN201610529069.2A patent/CN106015174A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374203A (en) * | 2011-10-31 | 2012-03-14 | 中联重科股份有限公司 | hydraulic control circuit |
| CN203202304U (en) * | 2013-03-27 | 2013-09-18 | 浙江海宏液压科技股份有限公司 | Multifunctional forklift multi-way valve |
| CN103900810A (en) * | 2014-04-16 | 2014-07-02 | 江苏二马液压元件有限公司 | Durability test table for safety valve |
| CN204003792U (en) * | 2014-08-20 | 2014-12-10 | 常德中联重科液压有限公司 | Reversing valve durability test system |
| CN204312460U (en) * | 2014-12-05 | 2015-05-06 | 宁波恒力液压股份有限公司 | Based on the oil hydraulic pump of parallel power-saving technology and the endurance test hydraulic pressure installation of relief valve |
| CN204824047U (en) * | 2015-07-02 | 2015-12-02 | 杭叉集团股份有限公司 | Fork truck multiple unit valve with second grade pressure control |
| CN105084261A (en) * | 2015-08-13 | 2015-11-25 | 安徽合力股份有限公司 | Dual-pump confluent energy-saving type forklift hydraulic system |
| CN105157971A (en) * | 2015-08-27 | 2015-12-16 | 无锡阳工机械制造有限公司 | Hydraulic multipath reversing valve delivery test method |
| CN205841372U (en) * | 2016-07-06 | 2016-12-28 | 安徽合力股份有限公司 | Characteristic and the experiment detection device of durability is opened and closed for relief valve |
Non-Patent Citations (3)
| Title |
|---|
| 徐文琴等: "先导式溢流阀特性分析及其检测方法研究", 《机床与液压》 * |
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Application publication date: 20161012 |