CN107575436B - A kind of more seperated arrangement for testing electro magnetic valve - Google Patents
A kind of more seperated arrangement for testing electro magnetic valve Download PDFInfo
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- CN107575436B CN107575436B CN201711043785.0A CN201711043785A CN107575436B CN 107575436 B CN107575436 B CN 107575436B CN 201711043785 A CN201711043785 A CN 201711043785A CN 107575436 B CN107575436 B CN 107575436B
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Abstract
The invention discloses a kind of more seperated arrangement for testing electro magnetic valve, by the way that the valve pocket installation cavity for installing valve pocket is arranged in the first cavity, the first oil duct and the second oil duct with valve pocket installation cavity intercommunication are respectively set on the first cavity and the second cavity, and first oil duct and the second oil duct number it is identical, correspond connection, the first oilhole that several groups are connected from the first different oil ducts is provided on valve pocket, the group number for the first oilhole being arranged on valve pocket with the spool of seperated solenoid valve to be tested be adapted, the cavity being arranged in valve pocket is for accommodating spool to be measured, to the valve pocket different according to different seperated electromagnetism valve replacements, then by the way that measuring unit is arranged on the first cavity and/or the second cavity, the performance of different seperated solenoid valves can be tested, to reach the single valve performance for testing a variety of seperated solenoid valves Purpose；Moreover, present invention compatibility is higher, be conducive to save the cost；In addition, operation of the present invention is simple, and it is easy to use, be conducive to improve testing efficiency.
Description
Technical field
It is especially a kind of for measuring various different seperated solenoid valve single valve performances the present invention relates to a kind of measuring device
More fission arrangement for testing electro magnetic valve.
Background technique
At present for different hydraulic modules, it will usually use a variety of seperated solenoid valves, including pressure valve, flow valve,
Switch valve and reversal valve, due to there is presently no the measuring device that one is capable of measuring a variety of seperated solenoid valves, for not
Same seperated solenoid valve, needs to design different magnetic valve performance measuring devices, to test the performance of single valve.
However, possessing the hydraulic module of a variety of seperated solenoid valves for one, each solenoid valve is measured if necessary
Single valve performance needs the measuring device different with profile arrangement according to the type of solenoid valve, not only increases measurement week in this way
Phase, and higher cost；Meanwhile being measured using a variety of measuring devices, measurement process certainly will be more cumbersome, and management is more tired
It is difficult.
In order to make the measurement of seperated solenoid valve become standardization that is simply unified and realizing measurement, need to redesign one
Kind can measure the measuring device of a variety of different seperated magnetic valve performances.
Summary of the invention
The object of the present invention is to provide a kind of more seperated arrangement for testing electro magnetic valve, to solve deficiency in the prior art, it
The measurement to a variety of seperated magnetic valve performances can be realized by replacing different valve pockets.
The present invention provides a kind of more seperated arrangement for testing electro magnetic valve, including the first cavity, the second cavity, valve pocket, oil duct
Connecting tube and measuring unit, first cavity are set to the top of the second cavity, and one end of oil duct connecting tube is mounted on the second chamber
The side of body, first cavity and/or the second cavity are connected with measuring unit；
The valve pocket installation cavity to match with the valve pocket is equipped in first cavity, the coaxial setting of the valve pocket is in institute
It states in valve pocket installation cavity, the first end of the valve pocket installation cavity closes setting, and second end axially extends to the first chamber along valve pocket
The one side of body, the side of first cavity are equipped with the Electrical heads mounting groove being connected with the second end of valve pocket installation cavity,
The Electrical heads mounting groove extends upwardly to the top of the first cavity；
The bottom of first cavity is equipped with several the first oil ducts being connected with valve pocket installation cavity, second cavity
Top be equipped with and several second oil ducts for being respectively communicated with identical as the quantity of first oil duct, wherein any one of
Second oil duct is connected with oil duct connecting tube；
The inside of the valve pocket is equipped with the cavity to match with the spool of solenoid valve, which axially extends to along valve pocket
One end face of valve pocket, the other end of valve pocket is integrally formed with spring mounting seat, and the centre of spring mounting seat is equipped with and cavity
The second oilhole being connected, along the first oil for being axially arranged with several groups and being connected with cavity of valve pocket on the outer wall of the valve pocket
Hole, and distributing position of the first oilhole of several groups on valve pocket is adapted with the spool of solenoid valve, the first oilhole described in every group is equal
Including the circumference along valve pocket to multiple first oilholes of setting, the first oilhole described in several groups respectively from the first different oil duct phases
Connection.
More seperated arrangement for testing electro magnetic valve as described above, wherein preferably, more seperated solenoid valve measurement dresses
It sets, further includes pressing plate and clamping screw, the pressing plate is set to the one side on the first cavity with Electrical heads mounting groove, passes through lock
Tight bolt is fixed on the first cavity.
More seperated arrangement for testing electro magnetic valve as described above, wherein preferably, the valve pocket is pacified far from the spring
The outer peripheral edge for filling one end of seat is formed with third defining flange along extending radially outwardly for valve pocket, which is ring
Shape.
Arrangement for testing electro magnetic valve much more as described above seperated, wherein preferably, on the outer wall of the valve pocket with every group the
The corresponding position of one oilhole is respectively equipped with an oil groove, the oil groove along valve pocket circumference to setting.
More seperated arrangement for testing electro magnetic valve as described above, wherein preferably, the spring mounting seat includes the first limit
Position flange and the second defining flange, first defining flange are the radially inwardly extending formation of inner wall by valve pocket, the second limit
Position flange is the radially inwardly extending formation of inner wall by the first defining flange, and the first defining flange is big along the length of valve pocket axial direction
In the second defining flange along the length of valve pocket axial direction, and the second defining flange is located in the first defining flange one far from cavity
End, the inner wall of the first defining flange and the second defining flange are towards forming spring mounting groove between an end face of cavity, and described the
The centre of two defining flanges is axially arranged with second oilhole along valve pocket.
More seperated arrangement for testing electro magnetic valve as described above, wherein preferably, the measuring unit includes pressure sensing
Device, the pressure sensor are mounted on the side of the first cavity, and the test lead of pressure sensor passes through the first cavity and the first oil duct
It is connected.
More seperated arrangement for testing electro magnetic valve as described above, wherein preferably, the measuring unit includes flowmeter,
The flowmeter is set in the first oil duct.
More seperated arrangement for testing electro magnetic valve as described above, wherein preferably, the quantity and second of first oil duct
The quantity of oil duct is disposed as six.
More seperated arrangement for testing electro magnetic valve as described above, wherein preferably, the number of the first oilhole on the valve pocket
Amount is less than or equal to six groups.
More seperated arrangement for testing electro magnetic valve as described above, wherein preferably, the valve pocket and valve pocket install cavity gap
Cooperation, and the outer wall of the valve pocket radially the gap with the inner wall of valve pocket installation cavity between 0um~20um.
Compared with prior art, more seperated arrangement for testing electro magnetic valve provided by the invention, by being arranged in the first cavity
For installing the valve pocket installation cavity of valve pocket, first with valve pocket installation cavity intercommunication is respectively set on the first cavity and the second cavity
Oil duct and the second oil duct, and the number of the first oil duct and the second oil duct is identical, corresponds connection, is provided with several groups on valve pocket
The group number of the first oilhole being connected from the first different oil ducts, the first oilhole being arranged on valve pocket is to be tested seperated electric with institute
The spool of magnet valve is adapted, and the cavity being arranged in valve pocket is for accommodating spool to be measured, thus according to different seperated solenoid valves
Different valve pockets is replaced, it, can be to different fissions then by the way that measuring unit is arranged on the first cavity and/or the second cavity
The performance of solenoid valve is tested, to achieve the purpose that the single valve performance for testing a variety of seperated solenoid valves；Moreover, the present invention is simultaneous
Capacitive is higher, reduces measurement period, prevent because seperated solenoid valve to be tested difference due to make a variety of different measurements
Device is conducive to save the cost and management；In addition, operation of the present invention is simple, and it is easy to use, measurement process is simplified, is conducive to
Improve testing efficiency.
Detailed description of the invention
Fig. 1 is the cross-sectional view of more seperated arrangement for testing electro magnetic valve of the embodiment of the present invention offer in a state of use；
Fig. 2 is the section view of more seperated arrangement for testing electro magnetic valve of another embodiment of the present invention offer in a state of use
Figure；
Fig. 3 is the axonometric drawing for more seperated arrangement for testing electro magnetic valve that the embodiment of the present invention provides；
Fig. 4 is the axonometric drawing for more seperated arrangement for testing electro magnetic valve that another embodiment of the present invention provides；
Fig. 5 is the explosive view for more seperated arrangement for testing electro magnetic valve that another embodiment of the present invention provides；
Fig. 6 is the axonometric drawing of valve pocket.
Description of symbols: the first cavity of 1-, 11- valve pocket installation cavity, 12- Electrical heads mounting groove, the first oil duct of 13-, 2-
Second cavity, the second oil duct of 21-, 3- valve pocket, the first oilhole of 31-, 32- spring mounting seat, the first defining flange of 321-, 322-
Two defining flanges, 323- spring mounting groove, the second oilhole of 33-, 34- oil groove, 35- third defining flange, 36- cavity, 4- pressing plate,
5- clamping screw, 6- oil duct connecting tube, 7- pressure sensor, 8- spool, 9- spring, 10- Electrical heads.
Specific embodiment
The embodiments described below with reference to the accompanying drawings are exemplary, for explaining only the invention, and cannot be construed to
Limitation of the present invention.
As shown in Figures 1 to 6, the embodiment provides a kind of more seperated arrangement for testing electro magnetic valve, including first
Cavity 1, the second cavity 2, valve pocket 3, oil duct connecting tube 6 and measuring unit (not shown), the first cavity 1 are set to the second cavity
2 top, one end of oil duct connecting tube 6 are mounted on the side of the second cavity 2, and the first cavity 1 is connected with measuring unit.
Wherein, it is equipped with the valve pocket installation cavity 11 to match with valve pocket 3 in the first cavity 1, the coaxial setting of valve pocket 3 is in valve pocket
In installation cavity 11, the first end of valve pocket installation cavity 11 (i.e. right end in Fig. 1 or Fig. 2) closing setting, second end (i.e. Fig. 1 or Fig. 2
In left end) along the left side for axially extending to the first cavity 1 of valve pocket 3, the left side of the first cavity 1 is equipped with and valve pocket is installed
The Electrical heads mounting groove 12 that the left end of chamber 11 is connected, the Electrical heads mounting groove 12 extend upwardly to the top of the first cavity 1, i.e.,
The specific location of Electrical heads mounting groove 12 is at the intermediate position in the upper left corner of the first cavity 1.
Wherein, the bottom of the first cavity 1 is equipped with several the first oil ducts 13 being connected with valve pocket installation cavity 11, the second chamber
The top of body 2 is equipped with to be corresponded and several second oil ducts 21 for being respectively communicated with the first oil duct 13, any in Fig. 1 and Fig. 2
One the second oil duct 21 is connected with oil duct connecting tube 6, and oil duct connecting tube 6 is used to provide pressure oil to the second oil duct 21.
Wherein, the inside of valve pocket 3 is equipped with the cavity 36 to match with the spool of seperated solenoid valve, and the cavity 36 is along valve pocket 3
Axially extend to the end face of the left end of valve pocket 3, the right end of valve pocket 3 integrally formed with spring mounting seat 32, spring mounting seat 32
Centre is equipped with the second oilhole 33 for being connected with cavity 36, on the outer wall of valve pocket 3 along valve pocket 3 be axially arranged with several groups with
The first oilhole 31 that cavity 36 is connected, and distributing position of the first oilhole of several groups 31 on valve pocket 3 and seperated solenoid valve
Spool is adapted, and every group of first oilhole 31 includes multiple first oilholes 31 of the circumference to setting along valve pocket 3, several groups first
Oilhole 31 is connected from the first different oil ducts 13 respectively.
It as depicted in figs. 1 and 2, is two different embodiments of the invention, Fig. 1 is that the present invention is applied to two eight reduction of fractions to a common denominators
The usage state diagram of body solenoid valve, Fig. 2 are the usage state diagrams that the present invention is applied to bi-bit bi-pass fission solenoid valve.
The working process of this embodiment is as follows: firstly, the valve pocket 3 to match to be socketed in the spool of seperated solenoid valve to be measured
On 8, the spring 9 of 8 one end of spool is connect with spring mounting seat 32, and valve pocket 3 is then inserted into valve pocket installation cavity together with spool 8
In 11, Electrical heads 10 are placed in Electrical heads mounting groove 12.Then, by oil duct connecting tube 6 to second of the leftmost side in Fig. 1 or figure
Oil duct 21 provides pressure oil, and first oil duct 13, first oilhole 31 of the pressure oil through the leftmost side enter in the pressure port of spool 8, then
It is successively flowed in corresponding first oilhole 31, the first oil duct 13 and the second oil duct 21 by the oil outlet of spool 8, remaining is useless to arrive
The first oilhole 31, the first oil duct 13, the second oil duct 21 and the second oilhole 33 can be used for draining；Followed by measuring unit
The correlated performance for measuring the spool 8 of each seperated solenoid valve, by replace different valve pockets 3 can to from different 3 phases of valve pocket
The performance for the seperated solenoid valve matched measures, and compatibility is higher, flexible to operation, greatly reduces measurement period, simplifies
Measurement process is conducive to improve measurement efficiency, it is not necessary that difference is fabricated separately according to different seperated solenoid valves as the prior art
Measuring device, advantageously reduce cost.
As shown in Figures 1 to 5, the present embodiment is preferably, and above-mentioned more seperated arrangement for testing electro magnetic valve, further include pressing plate
4 and clamping screw 5, pressing plate 4 is set to left side corresponding with 12 position of Electrical heads mounting groove on the first cavity 1, passes through locking
Bolt 5 is fixed on the first cavity 1, for seperated solenoid valve to be measured to be clamped between pressing plate 4 and spring mounting seat 32, is not necessarily to
By manually hand steered auxiliary during the test, be conducive to the Stability and veracity for improving test.
As shown in fig. 6, the present embodiment is preferably, the periphery far from the spring mounting seat (32) one end on valve pocket 3
Edge is formed with third defining flange 35 along extending radially outwardly for valve pocket 3, which is ring-type, third limit convex
Edge 35 is used to limit the left end of valve pocket 3 and the relative position of valve pocket installation cavity 11, is also convenient for picking and placing valve pocket 3, while to Electrical heads
10 are limited with the relative position of valve pocket.
As shown in fig. 6, the present embodiment is preferably, position corresponding with every group of first oilhole 31 on the outer wall of valve pocket 3
Be respectively equipped with an oil groove 34, the oil groove 34 along valve pocket 3 circumference to setting, be conducive to pressure oil along oil groove 34 to valve pocket 3
Circumference to the first oilhole 31 quickly shunted.
As shown in fig. 6, the present embodiment is preferably, spring mounting seat 32 includes the first defining flange 321 and the second limit
Flange 322, the left side of the first defining flange 321 for being limited to the right end of spool 8, the first defining flange 321 be by
The radially inwardly extending formation of the inner wall of valve pocket 3, the second defining flange 322 be by the first defining flange 321 inner wall radially
It extends inwardly to form, the first defining flange 321 is greater than the second defining flange 322 along 3 axial direction of valve pocket along the axial length of valve pocket 3
Length, and the second defining flange 322 is located at one end in the first defining flange 321 far from cavity 36, the first defining flange 321
Inner wall and the second defining flange 322 are towards forming spring mounting groove 323, the spring mounting groove 323 between an end face of cavity 36
For placing spring 9, the centre of the second defining flange 322 is axially arranged with the second oilhole 33 along valve pocket 3.
As shown in figure 4, the present embodiment is preferably, measuring unit includes pressure sensor 7, the pressure sensor 7 installation
In the side of the first cavity 1, the test lead of pressure sensor 7 passes through the first cavity 1 and is connected with corresponding first oil duct 13, is used for
Test the oil pressure in corresponding first oil duct 13.
The present embodiment is preferably, and measuring unit includes flowmeter, which is set in the first oil duct 13, for testing
The flow parameter of pressure oil in corresponding first oil duct 13.
As depicted in figs. 1 and 2, the present embodiment is preferably, and the quantity of the quantity of the first oil duct 13 and the second oil duct 21 is equal
It is set as six.
As depicted in figs. 1 and 2, the present embodiment is preferably, and the quantity of the first oilhole 31 on valve pocket 3 is less than or equal to six
Group.
The present embodiment is preferably, valve pocket 3 and 11 clearance fit of valve pocket installation cavity, and the outer wall of valve pocket 3 radially with valve
The gap of the inner wall of installation cavity 11 is covered between 0um~20um.
Structure, feature and effect of the invention, the above institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention does not limit the scope of implementation as shown in the drawings, it is all according to structure of the invention
Think made change or equivalent example modified to equivalent change, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (8)
1. a kind of more seperated arrangement for testing electro magnetic valve, it is characterised in that: including the first cavity (1), the second cavity (2), valve pocket
(3), oil duct connecting tube (6) and measuring unit, first cavity (1) are set to the top of the second cavity (2), oil duct connecting tube
(6) one end is mounted on the side of the second cavity (2), first cavity (1) and/or the second cavity (2) and measuring unit phase
Even；
The valve pocket installation cavity (11) to match with the valve pocket (3) is equipped in first cavity (1), the valve pocket (3) is coaxial
Setting in the valve pocket installation cavity (11), the first end of the valve pocket installation cavity (11) closes setting, and second end is along valve pocket
(3) side of the one side for axially extending to the first cavity (1), first cavity (1) is equipped with and valve pocket installation cavity
(11) the Electrical heads mounting groove (12) that second end is connected, the Electrical heads mounting groove (12) extend upwardly to the first cavity (1)
Top；
The bottom of first cavity (1) is equipped with several the first oil ducts (13) being connected with valve pocket installation cavity (11), described
The top of second cavity (2) is equipped with several second oil ducts identical as the quantity of first oil duct (13) and be respectively communicated with
(21), wherein any one of second oil duct (21) is connected with oil duct connecting tube (6)；
The inside of the valve pocket (3) is equipped with the cavity (36) to match with the spool of seperated solenoid valve, and the cavity (36) is along valve pocket
(3) end face of one end for axially extending to valve pocket (3), the other end of valve pocket (3) is integrally formed with spring mounting seat (32), bullet
The centre of spring mounting base (32) is equipped with the second oilhole (33) for being connected with cavity (36), on the outer wall of the valve pocket (3)
Along the first oilhole (31) for being axially arranged with several groups and being connected with cavity (36) of valve pocket (3), and the first oilhole of several groups (31)
Distributing position on valve pocket (3) is adapted with the spool of seperated solenoid valve, and the first oilhole (31) described in every group includes along valve
Cover the circumference of (3) to multiple first oilholes (31) of setting, the first oilhole (31) described in several groups respectively from the first different oil
Road (13) is connected；
More seperated arrangement for testing electro magnetic valve, further include pressing plate (4) and clamping screw (5), the pressing plate (4) is set to first
With the one side of Electrical heads mounting groove (12) on cavity (1), it is fixed on the first cavity (1) by clamping screw (5)；
Extend radially outwardly shape of the outer peripheral edge far from the spring mounting seat (32) one end of the valve pocket (3) along valve pocket (3)
At there is third defining flange (35), which is ring-type.
2. more seperated arrangement for testing electro magnetic valve according to claim 1, it is characterised in that: on the outer wall of the valve pocket (3)
Position corresponding with every group the first oilhole (31) is respectively equipped with an oil groove (34), circumference of the oil groove (34) along valve pocket (3)
To setting.
3. more seperated arrangement for testing electro magnetic valve according to claim 2, it is characterised in that: spring mounting seat (32) packet
The first defining flange (321) and the second defining flange (322) are included, first defining flange (321) is by the inner wall of valve pocket (3)
Radially inwardly extending formation, the second defining flange (322) are radially inwardly extending by the inner wall of the first defining flange (321)
It is formed, the first defining flange (321) is greater than the second defining flange (322) along valve pocket (3) axial direction along the length of valve pocket (3) axial direction
Length, and the second defining flange (322) is located at one end in the first defining flange (321) far from cavity (36), the first limit convex
The inner wall and the second defining flange (322) of edge (321) form spring mounting groove (323) towards between an end face of cavity (36),
The centre of second defining flange (322) is axially arranged with second oilhole (33) along valve pocket (3).
4. more seperated arrangement for testing electro magnetic valve according to claim 1, it is characterised in that: the measuring unit includes pressure
Sensor (7), the pressure sensor (7) are mounted on the side of the first cavity (1), and the test lead of pressure sensor (7) passes through the
One cavity (1) is connected with the first oil duct (13).
5. more seperated arrangement for testing electro magnetic valve according to claim 1, it is characterised in that: the measuring unit includes flow
Meter, the flowmeter are set in the first oil duct (13).
6. according to claim 1 to more fissions arrangement for testing electro magnetic valve described in 5 any one, it is characterised in that: described first
The quantity of oil duct (13) and the quantity of the second oil duct (21) are disposed as six.
7. more seperated arrangement for testing electro magnetic valve according to claim 6, it is characterised in that: first on the valve pocket (3)
The quantity of oilhole (31) is less than or equal to six groups.
8. more seperated arrangement for testing electro magnetic valve according to claim 1, it is characterised in that: the valve pocket (3) and valve pocket are pacified
Behave affectedly (11) clearance fit, and the outer wall of the valve pocket (3) radially with the gap of the inner wall of valve pocket installation cavity (11) 0um~
Between 20um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711043785.0A CN107575436B (en) | 2017-10-31 | 2017-10-31 | A kind of more seperated arrangement for testing electro magnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711043785.0A CN107575436B (en) | 2017-10-31 | 2017-10-31 | A kind of more seperated arrangement for testing electro magnetic valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107575436A CN107575436A (en) | 2018-01-12 |
| CN107575436B true CN107575436B (en) | 2019-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711043785.0A Active CN107575436B (en) | 2017-10-31 | 2017-10-31 | A kind of more seperated arrangement for testing electro magnetic valve |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185446A (en) * | 2018-11-13 | 2019-01-11 | 安徽江淮汽车集团股份有限公司 | A kind of electromagnetic pressure control valve for automatic gear-box |
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| EP1070893A2 (en) * | 1999-07-16 | 2001-01-24 | Smc Corporation | Method and device for managing operation of solenoid valve |
| CN101451558A (en) * | 2007-11-30 | 2009-06-10 | 上海诺玛液压***有限公司 | Pressure test frock for electro-hydraulic servo valve body |
| CN201330869Y (en) * | 2008-12-24 | 2009-10-21 | 长沙矿山研究院 | Electromagnetic valve with self-diagnosis function |
| CN203979007U (en) * | 2014-05-30 | 2014-12-03 | 杰锋汽车动力***股份有限公司 | A kind of proportional electromagnetic valve Flow characteristics testing apparatus |
| CN204284083U (en) * | 2014-12-04 | 2015-04-22 | 贵州红林机械有限公司 | Measure the device of oil nozzle for flow |
| CN105090172A (en) * | 2014-12-19 | 2015-11-25 | 华北水利水电大学 | Pressure distribution measuring device for cavity sidewall and valve core wall surface of hydraulic cone valve |
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2017
- 2017-10-31 CN CN201711043785.0A patent/CN107575436B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1070893A2 (en) * | 1999-07-16 | 2001-01-24 | Smc Corporation | Method and device for managing operation of solenoid valve |
| CN101451558A (en) * | 2007-11-30 | 2009-06-10 | 上海诺玛液压***有限公司 | Pressure test frock for electro-hydraulic servo valve body |
| CN201330869Y (en) * | 2008-12-24 | 2009-10-21 | 长沙矿山研究院 | Electromagnetic valve with self-diagnosis function |
| CN203979007U (en) * | 2014-05-30 | 2014-12-03 | 杰锋汽车动力***股份有限公司 | A kind of proportional electromagnetic valve Flow characteristics testing apparatus |
| CN204284083U (en) * | 2014-12-04 | 2015-04-22 | 贵州红林机械有限公司 | Measure the device of oil nozzle for flow |
| CN105090172A (en) * | 2014-12-19 | 2015-11-25 | 华北水利水电大学 | Pressure distribution measuring device for cavity sidewall and valve core wall surface of hydraulic cone valve |
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| CN107575436A (en) | 2018-01-12 |
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