CN207945137U - Swivel joint hydraulic loaded pressure charging system - Google Patents
Swivel joint hydraulic loaded pressure charging system Download PDFInfo
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- CN207945137U CN207945137U CN201721927148.5U CN201721927148U CN207945137U CN 207945137 U CN207945137 U CN 207945137U CN 201721927148 U CN201721927148 U CN 201721927148U CN 207945137 U CN207945137 U CN 207945137U
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- pressure
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- valve
- pressurized cylinder
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Abstract
A kind of swivel joint hydraulic loaded pressure charging system applied to engineer machinery test technical field,It includes low pressure constant displacement pump,Constant-pressure variable axial plunger pump,Three-position four-way electromagnetic directional valve,First pressurized cylinder,Second pressurized cylinder,First flow check valve,Second flow check valve,Bi-bit bi-pass Solenoid ball valve etc.,The low pressure oil that low pressure constant displacement pump is exported enters constant-pressure variable axial plunger pump,When three-position four-way electromagnetic directional valve commutates to left position or right position,Two pressurized cylinder piston movements,Its rod chamber alternately exports high pressure oil,High pressure oil enters swivel joint high-pressure channel,Hydraulic loaded is carried out to swivel joint,To carry out internal leakage external leakage test,Bi-bit bi-pass Solenoid ball valve commutates to left position at this time,System realizes bidirectional booster using two pressurized cylinders,It is simple in structure,It is easily fabricated,It is at low cost,When on-load pressure reaches 42MPa,Three-position four-way electromagnetic directional valve commutates to middle position,Swivel joint pressurize,Constant-pressure variable axial plunger pump off-load,Energy conservation and environmental protection.
Description
Technical field
The utility model is related to a kind of swivel joint loading systems applied to engineer machinery test technical field, especially relate to
And a kind of swivel joint hydraulic loaded pressure charging system.
Background technology
Swivel joint is the critical component in the engineering machinery such as hydraulic crane, excavator, land leveller, for connecting lifting
Machine, the hydraulic pressure of excavator fixed part and rotating part, pneumatic line make the system pipeline of upper and lower two part have 360 ° of phases
To movement without interfering.Swivel joint hydraulic loaded pressure charging system adds for realizing the hydraulic pressure of swivel joint high-pressure channel
It carries, to carry out internal leakage to swivel joint, external leakage is tested, and domestic swivel joint testing equipment is also in lower at present
Level, the existing pressure charging system for carrying out hydraulic loaded to swivel joint using Hydraulic Elements such as high-pressure pump, high pressure valves, there are problems
It is easy leakage, of high cost, and uses the swivel joint hydraulic loaded pressure charging system of pressurized cylinder, is that structure is more complex there are problem,
Therefore it is the domestic project for being badly in need of solving to develop a kind of novel swivel joint hydraulic loaded pressure charging system.This swivel joint hydraulic pressure
Pressure charging system hydraulic loading pressure is loaded up to 42MPa, simple in structure, pressure maintaining performance is reliable, and energy conservation and environmental protection is at low cost, and energy
The oil temperature of real-time detecting system, and the fluid flow and on-load pressure of swivel joint are detected, it also can display system each section pressure
Power.
Invention content
The purpose of this utility model is to provide a kind of swivel joint hydraulic loaded supercharging system not using high voltage power elements
System reduces leakage, reduces cost, and bidirectional booster is realized using two pressurized cylinders, simple in structure, easily fabricated, and pressure maintaining performance
Reliably, using constant-pressure variable axial plunger oil pump feed, output oil liquid pressure reaches specified value output fluid flow and reduces automatically,
Energy loss is avoided, when the on-load pressure of swivel joint reaches specified value, swivel joint pressurize, constant-pressure variable axial plunger pump unloads
Lotus, energy conservation and environmental protection.
Swivel joint hydraulic loaded pressure charging system described in the utility model comprising fuel tank, liquid level liquid thermometer, air-filtering
Device, oil filter, heater, low pressure constant displacement pump, smart oil filter, temperature sensor, low pressure relief valve, low pressure gauge, constant pressure become
Measure axial plunger pump, middle pressurized overflow valve, counterbalance valve, three-position four-way electromagnetic directional valve, middle pressure pressure table, the first pressurized cylinder, second
Pressurized cylinder, the first flow check valve, the second flow check valve, third flow check valve, the 4th flow check valve, the first high pressure pressure
Power table, flow sensor, check valve, the second high-pressure manometer, pressure sensor, bi-bit bi-pass Solenoid ball valve, cooler, revolution
Connector, the first close switch, the second close switch；The inlet port of low pressure constant displacement pump is low by oil filter and heater connected tank
The output oil port of pressure constant displacement pump connects smart oil filter oil inlet, and the oil outlet of smart oil filter passes through oil circuit jointing temp sensor, low pressure
Pressure gauge and constant-pressure variable axial plunger pump oil inlet, while the oil outlet of smart oil filter passes through low pressure relief valve connected tank；It is permanent
Pressure variable amount axial plunger pump oil outlet by oil circuit connect middle pressure pressure table, three-position four-way electromagnetic directional valve oil inlet, while it is permanent
Pressure variable amount axial plunger pump oil outlet passes through middle pressurized overflow valve connected tank；The oil return opening of three-position four-way electromagnetic directional valve passes through back pressure
Valve connected tank, the first hydraulic fluid port of three-position four-way electromagnetic directional valve connect the rod chamber of the first pressurized cylinder by the first flow check valve,
The first hydraulic fluid port of three-position four-way electromagnetic directional valve connects the rodless cavity of the first pressurized cylinder, 3-position 4-way electromagnetic switch by oil circuit simultaneously
Second hydraulic fluid port of valve connects the rod chamber of the second pressurized cylinder, while the of three-position four-way electromagnetic directional valve by the 4th flow check valve
Two hydraulic fluid ports connect the rodless cavity of the second pressurized cylinder by oil circuit, and the rod chamber of the first pressurized cylinder and the second pressurized cylinder is matched further through second
Stream check valve, third flow check valve connect flow sensor, flow sensor and the high-pressure channel through check valve and swivel joint
Connection, high-pressure channel pass through bi-bit bi-pass Solenoid ball valve, cooler connected tank.
Be further improved, the second flow check valve, third flow check valve oil outlet be additionally provided with for showing
Show that the first high-pressure manometer of the first pressurized cylinder, the second pressurized cylinder output end oil liquid pressure, the oil outlet setting of check valve are useful
In the second high-pressure manometer of display swivel joint on-load pressure, it is provided with and detects back in the oil outlet of swivel joint high-pressure channel
The pressure sensor of adapter on-load pressure.
It is further improved, first is provided with beside the piston rod of first pressurized cylinder and the second pressurized cylinder close to opening
It closes, the second close switch.
It is further improved, first pressurized cylinder includes the first cylinder cap, piston, cylinder barrel, cylinder bottom, the first cylinder cap and cylinder barrel
It is connected by 6 screws, cylinder bottom connect with cylinder barrel by 6 the first screws, with the first oil duct on cylinder barrel, with the on cylinder cap
Two oil ducts, third oil duct also have on cylinder cap oil expulsion channel, the structure of the second pressurized cylinder identical as the first pressurized cylinder；Baffle ring and
The piston rod of one pressurized cylinder is connected by the second screw, and the piston rod of the second pressurized cylinder enters the circular trough of baffle ring, the first supercharging
First cylinder cap of cylinder and the second cylinder cap of the second pressurized cylinder are supported using 4 cylindrical rods, 4 cylindrical rods and the first cylinder cap and second
Cylinder cap is connected by third screw, and the first pressurized cylinder and the second pressurized cylinder are supported by holder, holder and the first cylinder cap and second
Cylinder cap is connected further through third screw.
The beneficial effects of the utility model are：
Bidirectional booster is realized using two pressurized cylinders, by the electricity for control three-position four-way electromagnetic directional valve of signaling close to switch
Magnet obtains electric and power-off, by the first flow check valve, the second flow check valve, third flow check valve, the 4th flow check valve
Play flow, makes the first pressurized cylinder, the second pressurized cylinder alternately output high pressure oil, it is simple in structure, it is easily fabricated, become using constant pressure
Axial plunger oil pump feed is measured, output oil liquid pressure reaches specified value output fluid flow and reduces automatically, avoids overflow generation
Energy loss, when the on-load pressure of swivel joint reaches 42MPa, by the second flow check valve, third flow check valve,
Check valve and bi-bit bi-pass Solenoid ball valve are to swivel joint pressurize, constant-pressure variable axial plunger pump off-load at this time, energy conservation and environmental protection,
It will be widely used in the experimental technique field of swivel joint.
Description of the drawings
Fig. 1 is the swivel joint hydraulic loaded pressure charging system schematic diagram of the utility model；
Fig. 2 is the first and second pressurized cylinder structure charts of the utility model；
Fig. 3 is the first and second pressurized cylinder structure sectional views of the utility model.
Specific implementation mode
With reference to attached drawing, swivel joint hydraulic loaded pressure charging system includes fuel tank 1, liquid level liquid thermometer 2, air cleaner 3, filter
Oily device 4, heater 5, low pressure constant displacement pump 6, smart oil filter 7, temperature sensor 8, low pressure relief valve 9, low pressure gauge 10, constant pressure
Axial variable displacement plunger pump 11, middle pressurized overflow valve 12, counterbalance valve 13, three-position four-way electromagnetic directional valve 14, middle pressure pressure table 15, first
Pressurized cylinder 17, the second pressurized cylinder 21, the first flow check valve 16, the second flow check valve 18, third flow check valve the 20, the 4th
Flow check valve 22, the first high-pressure manometer 19, flow sensor 23, check valve 24, the second high-pressure manometer 25, pressure sensing
Device 26, bi-bit bi-pass Solenoid ball valve 27, cooler 28, swivel joint 29, first approach switch 30, second close to switch 31.
It is additionally provided in the oil outlet of the second flow check valve 18, third flow check valve 20 for showing the first supercharging
First high-pressure manometer 19 of cylinder, the second pressurized cylinder output end oil liquid pressure, is provided in the oil outlet of check valve 24 for showing
The second high-pressure manometer 25 for showing 29 on-load pressure of swivel joint is provided with detection in the oil outlet of 29 high-pressure channel of swivel joint
The pressure sensor 26 of swivel joint on-load pressure.
First is provided with beside the piston rod of first pressurized cylinder 17 and the second pressurized cylinder 21 to open close to switch 30, second is close
Close 31.
First pressurized cylinder 17 includes the first cylinder cap 35, piston 39, cylinder barrel 38, cylinder bottom 41, and the first cylinder cap 35 and cylinder barrel 38 are logical
6 screw connections are crossed, cylinder bottom 41 is connect with cylinder barrel 38 by 6 the first screws 40, has the first oil duct 42, cylinder cap on cylinder barrel 38
There is the second oil duct 43, third oil duct 47 on 35, also there is oil expulsion channel 36, the structure and first of the second pressurized cylinder 21 on cylinder cap 35
Pressurized cylinder 17 is identical；Baffle ring 34 is connect with the piston rod 37 of the first pressurized cylinder 17 by the second screw 44, the work of the second pressurized cylinder
Stopper rod 32 enters the circular trough of baffle ring 34, and the first cylinder cap 35 of the first pressurized cylinder and the second cylinder cap 48 of the second pressurized cylinder use 4
A cylindrical rod 33 supports, and 4 cylindrical rods 33 are connect with the first cylinder cap 35 and the second cylinder cap 48 by third screw 46, the first supercharging
Cylinder 17 and the second pressurized cylinder 21 are supported by holder 45, and holder 45 and the first cylinder cap 35 and the second cylinder cap 48 are further through third screw
46 connections.
When the electromagnet 1YA of three-position four-way electromagnetic directional valve 14 obtains electric, the electromagnet 3YA of bi-bit bi-pass Solenoid ball valve 27 is disconnected
Electricity, the low pressure oil that low pressure constant displacement pump 6 is exported enter constant-pressure variable axial plunger pump 11, and 11 institute of constant-pressure variable axial plunger pump is defeated
The middle pressure oil gone out has bar through 14 left position of three-position four-way electromagnetic directional valve, the 4th flow check valve 22 into the second pressurized cylinder 21
Chamber, while the middle pressure oil that constant-pressure variable axial plunger pump 11 is exported is directly entered by 14 left position of three-position four-way electromagnetic directional valve
The rodless cavity of second pressurized cylinder 21, because the bearing area of rodless cavity is more than the bearing area of rod chamber, the second pressurized cylinder 21
Piston moves downward, and the piston rod 32 of the second pressurized cylinder 21 pushes the piston of the first pressurized cylinder 17 also to transport to the left by baffle ring 34
Dynamic, the rod chamber of the second pressurized cylinder exports high pressure oil by third flow check valve 20, the discharge of 17 rodless cavity of the first pressurized cylinder
A fluid part enters rod chamber by the first flow check valve 16, and another part is left by three-position four-way electromagnetic directional valve 14
Position, counterbalance valve 13 flow back to fuel tank, and the second flow check valve 18, the 4th flow check valve 22 are closed under the action of pressure difference at this time,
When the electromagnet 2YA of three-position four-way electromagnetic directional valve 14 obtains electric, the middle pressure oil that constant-pressure variable axial plunger pump 11 is exported is through three
Position 14 right position of four-way electromagnetic reversing valve, the first flow check valve 16 enter the rod chamber of the first pressurized cylinder 17, while constant-pressure variable
The middle pressure oil that axial plunger pump 11 is exported is directly entered the first pressurized cylinder 17 by 14 right position of three-position four-way electromagnetic directional valve
Rodless cavity, because the bearing area of rodless cavity is more than the bearing area of rod chamber, the piston of the first pressurized cylinder 17 moves right, the
The piston rod 37 of one pressurized cylinder 17 pushes the piston of the second pressurized cylinder 21 also to move right by baffle ring 34, and the first pressurized cylinder has
Rod cavity exports high pressure oil by the second flow check valve 18, and a fluid part for 21 rodless cavity of the second pressurized cylinder discharge passes through the 4th
Flow check valve 22 enters rod chamber, and another part flows back to fuel tank by 14 right position of three-position four-way electromagnetic directional valve, counterbalance valve 13,
The first flow check valve 16, third flow check valve 20 are closed under the action of pressure difference at this time, and high pressure oil pressure can reach
42MPa, high pressure oil enter the high-pressure channel of swivel joint 29 through flow sensor 23, check valve 24, are carried out to swivel joint 29
Load, by the oil temperature of 8 detecting system of temperature sensor, flow sensor 23, pressure sensor 26 detect swivel joint respectively
Fluid flow and on-load pressure show that 6 output oil port pressure of low pressure constant displacement pump, middle pressure pressure table 15 are shown by low pressure gauge 10
11 oil outlet pressure of constant-pressure variable axial plunger pump, the first high-pressure manometer 19 show the first pressurized cylinder 17, the second pressurized cylinder 21
Output end pressure, the second high-pressure manometer 25 show the on-load pressure of swivel joint, are opened by first close to switch 30, second is close
It closes the electromagnet that 31 signal control three-position four-way electromagnetic directional valve 14 and obtains electric and power-off.
When the middle oil pressure that constant-pressure variable axial plunger pump 11 is exported reaches specified value, output fluid flow is certainly
It is dynamic to reduce, avoid a large amount of fluid from flowing back to fuel tank, the overflow energy loss of generation by middle pressurized overflow valve 12.
When the on-load pressure of swivel joint reaches 42MPa, electromagnet 1YA, 2YA of three-position four-way electromagnetic directional valve 14 are disconnected
Electricity, three-position four-way electromagnetic directional valve 14 commutate to middle position, by the second flow check valve 18, third flow check valve 20, unidirectional
Valve 24 and bi-bit bi-pass Solenoid ball valve 27 are to swivel joint pressurize, and the fluid that constant-pressure variable axial plunger pump 11 is exported is through three
Position, counterbalance valve 13 flow back to fuel tank, i.e. 11 off-load of constant-pressure variable axial plunger pump in the four-way electromagnetic reversing valve 14 of position.
When system high oil temperature, the electromagnet 1YA or 2YA of three-position four-way electromagnetic directional valve 14 obtain electric, bi-bit bi-pass electromagnetism
The electromagnet 3YA of ball valve 27 obtains electric, the startup of cooler 28, the high pressure of the first pressurized cylinder 17 and the output of 21 rod chamber of the second pressurized cylinder
Oil enters the high-pressure channel of swivel joint through check valve 24, and high-pressure channel output hydraulic pressure oil is right through bi-bit bi-pass Solenoid ball valve 27
Position, cooler 28 flow back to fuel tank, and circulating cooling is carried out to system；When oil temperature is too low in fuel tank, heater 5 starts, to fluid into
Row heating.
The utility model provides a kind of swivel joint hydraulic loaded pressure charging system, and the above is only the utility model
Preferred implementation method, it is noted that for those skilled in the art, do not departing from the utility model principle
Under the premise of, it can also make several improvements, these improvement also should be regarded as the scope of protection of the utility model.
Claims (4)
1. a kind of swivel joint hydraulic loaded pressure charging system, it is characterised in that：Swivel joint hydraulic loaded pressure charging system includes oil
Case (1), liquid level liquid thermometer (2), air cleaner (3), oil filter (4), heater (5), low pressure constant displacement pump (6), smart oil filter
(7), temperature sensor (8), low pressure relief valve (9), low pressure gauge (10), constant-pressure variable axial plunger pump (11), middle pressure are overflow
Flow valve (12), counterbalance valve (13), three-position four-way electromagnetic directional valve (14), middle pressure pressure table (15), the first pressurized cylinder (17), second
Pressurized cylinder (21), the first flow check valve (16), the second flow check valve (18), third flow check valve (20), the 4th flow
Check valve (22), the first high-pressure manometer (19), flow sensor (23), check valve (24), the second high-pressure manometer (25), pressure
Force snesor (26), bi-bit bi-pass Solenoid ball valve (27), cooler (28), swivel joint (29), first are close to switch (30), the
Two close switches (31)；For the inlet port of low pressure constant displacement pump (6) by oil filter (4) and heater (5) connected tank (1), low pressure is fixed
The output oil port of amount pump (6) connects smart oil filter (7) oil inlet, and the oil outlet of smart oil filter (7) passes through oil circuit jointing temp sensor
(8), low pressure gauge (10) and constant-pressure variable axial plunger pump (11) oil inlet, while the oil outlet of smart oil filter passes through low pressure
Overflow valve (9) connected tank (1)；Constant-pressure variable axial plunger pump (11) oil outlet by oil circuit connect middle pressure pressure table (15), three
The oil inlet (P) of four-way electromagnetic reversing valve (14), while constant-pressure variable axial plunger pump oil outlet passes through middle pressurized overflow valve (12)
Connected tank；The oil return opening (T) of three-position four-way electromagnetic directional valve (14) passes through counterbalance valve (13) connected tank, 3-position 4-way electromagnetic switch
The first hydraulic fluid port (A) of valve (14) meets the rod chamber of the first pressurized cylinder (17), while three four by the first flow check valve (16)
The first hydraulic fluid port (A) of electric change valve connects the rodless cavity of the first pressurized cylinder (17), three-position four-way electromagnetic directional valve by oil circuit
(14) the second hydraulic fluid port (B) connects the rod chamber of the second pressurized cylinder (21), while 3-position 4-way by the 4th flow check valve (22)
The second hydraulic fluid port (B) of solenoid directional control valve connects the rodless cavity of the second pressurized cylinder (21), the first pressurized cylinder (17) and second by oil circuit
The rod chamber of pressurized cylinder (21) connects flow sensor further through the second flow check valve (18), third flow check valve (20)
(23), it flow sensor (23) and is connect with the high-pressure channel of swivel joint (29) through check valve (24), high-pressure channel passes through two
Position two-way Solenoid ball valve (27), cooler (28) connected tank.
2. swivel joint hydraulic loaded pressure charging system according to claim 1, it is characterised in that：In the second flow check valve
(18), the oil outlet of third flow check valve (20) is additionally provided with for showing the first pressurized cylinder, the second pressurized cylinder output end oil
The first high-pressure manometer (19) of hydraulic coupling is provided in the oil outlet of check valve (24) for showing that swivel joint (29) loads
The second high-pressure manometer (25) of pressure is provided with detection swivel joint load in the oil outlet of swivel joint (29) high-pressure channel
The pressure sensor (26) of pressure.
3. swivel joint hydraulic loaded pressure charging system according to claim 1, it is characterised in that：First pressurized cylinder (17) and
First is provided with beside the piston rod of second pressurized cylinder (21) close to switch (30), the second close switch (31).
4. swivel joint hydraulic loaded pressure charging system according to claim 1, it is characterised in that：First pressurized cylinder (17) wraps
The first cylinder cap (35), piston (39), cylinder barrel (38), cylinder bottom (41) are included, the first cylinder cap (35) is connected with cylinder barrel (38) by 6 screws
It connects, cylinder bottom (41) is connect with cylinder barrel (38) by 6 the first screws (40), has the first oil duct (42), cylinder cap on cylinder barrel (38)
(35) there is the second oil duct (43), third oil duct (47) on, also there is oil expulsion channel (36), the second pressurized cylinder (21) on cylinder cap (35)
Structure it is identical as the first pressurized cylinder (17)；Baffle ring (34) and the piston rod (37) of the first pressurized cylinder (17) pass through the second screw
(44) it connects, the piston rod (32) of the second pressurized cylinder enters the circular trough of baffle ring (34), the first cylinder cap (35) of the first pressurized cylinder
Supported using 4 cylindrical rods (33) with the second cylinder cap (48) of the second pressurized cylinder, 4 cylindrical rods (33) and the first cylinder cap (35) and
Second cylinder cap (48) is connected by third screw (46), and the first pressurized cylinder (17) and the second pressurized cylinder (21) are propped up by holder (45)
Support, holder (45) are connect with the first cylinder cap (35) and the second cylinder cap (48) further through third screw (46).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721927148.5U CN207945137U (en) | 2017-12-27 | 2017-12-27 | Swivel joint hydraulic loaded pressure charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721927148.5U CN207945137U (en) | 2017-12-27 | 2017-12-27 | Swivel joint hydraulic loaded pressure charging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207945137U true CN207945137U (en) | 2018-10-09 |
Family
ID=63701153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721927148.5U Expired - Fee Related CN207945137U (en) | 2017-12-27 | 2017-12-27 | Swivel joint hydraulic loaded pressure charging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207945137U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939755A (en) * | 2017-12-27 | 2018-04-20 | 南京林业大学 | Swivel coupling hydraulic loaded pressure charging system |
-
2017
- 2017-12-27 CN CN201721927148.5U patent/CN207945137U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939755A (en) * | 2017-12-27 | 2018-04-20 | 南京林业大学 | Swivel coupling hydraulic loaded pressure charging system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Nanjing Monte tech Environmental Protection Technology Co., Ltd. Assignor: Nanjing Forestry University Contract record no.: X2019320000110 Denomination of utility model: Rotary joint hydraulic loading supercharging system Granted publication date: 20181009 License type: Common License Record date: 20191015 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Anhui Arrow Electronics Co., Ltd. Assignor: Nanjing Forestry University Contract record no.: X2019320000145 Denomination of utility model: Rotary joint hydraulic loading supercharging system Granted publication date: 20181009 License type: Common License Record date: 20191022 |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201125 Address after: No.28 Liming Road, Laian Economic Development Zone, Chuzhou, Anhui Province Patentee after: Chuzhou Monte tech Environmental Protection Technology Co.,Ltd. Address before: Nanjing City, Jiangsu province 210037 Longpan Road No. 159 Patentee before: NANJING FORESTRY University |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181009 Termination date: 20201227 |