CN108626193B - Plug-in type valve - Google Patents
Plug-in type valve Download PDFInfo
- Publication number
- CN108626193B CN108626193B CN201810485265.3A CN201810485265A CN108626193B CN 108626193 B CN108626193 B CN 108626193B CN 201810485265 A CN201810485265 A CN 201810485265A CN 108626193 B CN108626193 B CN 108626193B
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- working oil
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- 230000000903 blocking Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002441 reversible Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B15/00—Elements, tools, or details of ploughs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
- F15B2013/004—Cartridge valves
Abstract
The invention relates to a plug-in valve, which is characterized in that: the valve sleeve is provided with an oil inlet, an oil return port, a first working oil port and a second working oil port; the first channel is internally provided with a reversing valve core, the first channel on one side of the reversing valve core forms a main control cavity, and the first channel on the other side forms a secondary control cavity; the second channel is used for communicating the second working oil port with the secondary control cavity; and the overflow valve is arranged on the second channel and normally opens the second channel, and when the pressure of the second working oil port reaches a certain value, the overflow valve is opened, and oil flows into the main control cavity from the second working oil port. The plug-in valve is simple and reasonable in structure, low in cost and capable of automatically controlling the turnover of the turnover plow.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to a plug-in type valve.
Background
In recent years, hydraulic reversible plows have begun to be popularized and applied in most areas of China. The ploughing and lifting function with the turning plow has the advantages of no ridge opening and closing, high production efficiency, energy saving, etc. The hydraulic turnover plow uses the hydraulic system of tractor to control the alternate operation of left and right plow bodies, so as to achieve the purpose of no opening and closing ridges. As shown in figure 6, the turnover mechanism of the hydraulic turnover plow mainly comprises a suspension bracket 101, a rotating shaft 105, a plow beam 102 and an oil cylinder 103, wherein the rotating shaft 105 is welded on the suspension bracket 101, the plow beam 102 is arranged on the rotating shaft 105, two ends of the oil cylinder 103 are respectively hinged on the upper part of the suspension bracket and the plow beam 102 by pin shafts, and a plow body 104 is arranged on the plow beam 102. The oil cylinder is controlled by a hydraulic system of the tractor, and when the plough is in a working state, the oil cylinder is in a maximum extension state. When the plough beam rotates to a position close to the vertical position, the oil cylinder is controlled to extend out, so that the plough beam crosses a dead point position, and continues to rotate under the action of thrust and gravity of the oil cylinder until the plough beam stops working at the other side.
At present, the turning control valve used for controlling the oil cylinder at home and abroad mainly has two forms, one is a manual hydraulic turning control valve, and the other is an automatic turning control valve. The manual mode is that the driver of the tractor directly operates the manual slide valve to control the oil path of the oil cylinder to make the reversible plough turn over initially, the plough shifts the shifting fork to drive a rotary valve to make the oil path of the oil cylinder change over when the plough goes beyond the middle position, and the turnover control valve is operated by the driver of the tractor except for operating the steering wheel and lifting the plough when the ground turns, so that the actions are very nervous and busy in a short time, and the labor intensity is increased; meanwhile, two control valves are required, so that the structure is complex and the cost is high. The automatic turnover control valve utilizes a set of mechanism to control two rotary valves, so that the first rotary valve controls the oil way of the oil cylinder to make the plough start to turn over, and the second rotary valve controls the change-over of the oil way of the oil cylinder in the turnover process to realize the turnover reversing of the plough. The turnover mechanism realizes full-automatic turnover reversing. However, the structure is very complicated, the reliability is poor, and the cost of using two control rotary valves is still high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a cartridge valve which is simple in structure, low in manufacturing cost and capable of realizing automatic turnover control of a turnover plow aiming at the current situation of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a cartridge valve, characterized by: the valve sleeve is provided with an oil inlet, an oil return port, a first working oil port and a second working oil port, the valve sleeve is provided with a first channel, the first channel is provided with a first annular flow through groove, a second annular flow through groove, a third annular flow through groove and a fourth annular flow through groove, the first flow through groove is communicated with the second working oil port, the second annular flow through groove is communicated with the oil inlet, the third annular flow through groove is communicated with the first working oil port, and the fourth annular flow through groove is communicated with the oil return port; the reversing valve core is arranged in the first channel and can slide, the reversing valve core is provided with a first convex shoulder, a second convex shoulder, a third convex shoulder and a fourth convex shoulder, the first channel at one end of the reversing valve core forms a main control cavity, the first channel at the other end of the reversing valve core forms a secondary control cavity, a first flow channel communicated with a fourth flow channel and the secondary control cavity is arranged in the reversing valve core, a first damping hole communicated with the main control cavity and the first flow channel is further arranged in the reversing valve core, the main control cavity is further communicated with a first working oil port through a second damping hole arranged on the valve sleeve, a second channel communicated with a second working oil port and the main control cavity is further arranged on the valve sleeve, a first through hole communicated with the first flow channel is arranged on the first convex shoulder, and a first spring enabling the reversing valve core to keep a left movement trend is arranged in the secondary; the overflow valve is arranged on the second channel and used for normally disconnecting the second channel, a first port of the overflow valve is communicated with the second working oil port, a second port of the overflow valve is communicated with the main control cavity, when the pressure of the second working oil port reaches a certain value, the overflow valve is opened, and oil flows into the main control cavity from the second working oil port.
Preferably, when the reversing valve core is positioned at the left end position, the first through flow groove is communicated with the second through flow groove, and the third through flow groove is communicated with the fourth through flow groove; when the reversing valve core is positioned at the right end position, the first through flow groove is communicated with the first through flow hole, and the second through flow groove is communicated with the third through flow groove.
Preferably, the first channel is of a structure with a left-end opening and a right-end closed, the valve sleeve is in threaded connection with a plug to close the left-end opening of the first channel, and a main control cavity is formed between the plug and the reversing valve core.
Preferably, the overflow valve comprises a conical valve core, a sliding sleeve, a second spring and a threaded sleeve, the threaded sleeve is fixedly connected to the valve sleeve, the second spring is arranged in an inner cavity of the threaded sleeve, the sliding sleeve is arranged in an inner hole of the valve sleeve in a sliding mode, the right end of the sliding sleeve abuts against a step of the conical valve core, the left end of the sliding sleeve abuts against the second spring, and the conical valve core keeps the tendency of blocking the valve port under the action force of the second spring.
Compared with the prior art, the invention has the advantages that:
(1) the invention is designed in a plug-in type structure, and has the advantages of compact volume, simple structure and low manufacturing cost.
(2) The invention is designed according to the principle, can automatically control the overturning cylinder to retract and extend firstly, does not need a driver to consume energy, and has high automation degree.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic diagram of a diverter valve spool in a right end position according to an embodiment of the present invention;
FIG. 4 is a hydraulic schematic of an embodiment of the present invention;
FIG. 5 is a hydraulic schematic diagram of an embodiment of the present invention;
fig. 6 is a schematic view of a hydraulic reversible plow mechanism.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 to 3, a preferred embodiment of the present invention is shown.
A cartridge valve, comprising:
the oil inlet P, the oil return port T, the first working oil port A and the second working oil port B are arranged on the valve sleeve 3, a first channel L1 is arranged on the valve sleeve 3, an annular first through flow groove 301, an annular second through flow groove 302, an annular third through flow groove 303 and an annular fourth through flow groove 304 are arranged on the first channel L1, the first through flow groove 301 is communicated with the second working oil port B, the second through flow groove 302 is communicated with the oil inlet P, the third through flow groove 303 is communicated with the first working oil port A, and the fourth through flow groove 304 is communicated with the oil return port T;
the reversing valve core 2 is arranged in a first channel L and can slide, a first shoulder 2a, a second shoulder 2B, a third shoulder 2c and a fourth shoulder 2d are arranged on the reversing valve core 2, the first channel at one end of the reversing valve core 2 forms a main control cavity 3a, the first channel at the other end of the reversing valve core 2 forms a secondary control cavity 3B, a first flow channel 22 which is communicated with a fourth flow channel 304 and the secondary control cavity 3B is arranged in the reversing valve core 2, a first damping hole 21 which is communicated with the main control cavity 3a and the first flow channel 22 is further arranged in the reversing valve core 2, the main control cavity 3a is further communicated with a first working oil port A through a second damping hole 32 which is formed in the valve sleeve 3, a second channel L which is communicated with the second working oil port B and the main control cavity 3a is further arranged in the valve sleeve 3, a first through hole 24 which is communicated with the first flow channel 22 is formed in the secondary control cavity 3B, a first spring 4 which enables the reversing valve core 2 to keep a left-moving trend is arranged in the valve sleeve 3, the first channel L is a closed structure, the first channel 3a structure which is communicated with a first through hole 365, and a first through hole 302 which is communicated with a first through flow channel 301 which is formed in the first through a left-way, and a through hole 301 which is communicated with a through hole which is communicated with a left-way communicated with a first reversing valve core 301 which is communicated with a left-way communicated with a first reversing.
The overflow valve 1 is arranged on the second channel L2 and used for normally disconnecting the second channel L2, a first port of the overflow valve 1 is communicated with a second working oil port B, a second port of the overflow valve 1 is communicated with the main control cavity 3a, when the pressure of the second working oil port B reaches a certain value, the overflow valve 1 is opened, oil flows into the main control cavity 3a from the second working oil port B, the overflow valve 1 comprises a conical valve core 11, a sliding sleeve 12, a second spring 13 and a threaded sleeve 14, the threaded sleeve 14 is fixedly connected to the valve housing 3, the second spring 13 is arranged in an inner cavity of the threaded sleeve 14, the sliding sleeve 12 is arranged in an inner hole of the valve housing 3 in a sliding mode, the right end of the sliding sleeve abuts against a step of the conical valve core 11, the left end of the sliding sleeve abuts against the second spring 13, and the conical valve core 11 keeps the tendency of blocking the valve port under the.
The working principle and the process of the plug-in valve are as follows:
in application, as shown in fig. 5 (the hydraulic lock in the actual connection is omitted in the figure), the oil inlet P and the oil return port T of the hydraulic reversing valve 9 are respectively connected with the working oil ports a1 and B1 of the electromagnetic reversing valve 7 for controlling oil supply, the first working oil port a of the hydraulic reversing valve is connected with the rodless cavity of the reversing cylinder 8, and the second working oil port B of the hydraulic reversing valve is connected with the rod cavity of the reversing cylinder 8.
When the turnover plow is in a working state and does not need to be turned over, the electromagnetic reversing valve 7 is in a power-off state, the oil ports A1 and B1 are communicated with the oil return port T1, the oil port P and the oil port T of the reversing valve 9 are also in a non-pressure state, the reversing valve core 3 is in a position shown in figure 1 under the action force of the first spring 4, the first through flow groove 301 is communicated with the second through flow groove 302, and the third through flow groove 303 is communicated with the fourth through flow groove 304.
When the turnover plow needs to be controlled to turn over, the electromagnetic reversing valve 7 is electrified, the oil inlet P of the reversing valve is communicated with the outlet of the hydraulic pump 6, the oil port T is connected with the oil tank, as shown in figure 1, when oil enters from the oil inlet P, the main control cavity 3a and the secondary control cavity 3b are communicated with the oil return port T through the first flow passage 22, so that the pressures in the main control cavity 3a and the secondary control cavity 3b are equal, and the reversing valve core 3 is continuously positioned at the position shown in figure 1 under the action force of the first spring 4. Oil at the outlet of the hydraulic pump 6 enters the oil inlet P after passing through the electromagnetic directional valve 7, then enters the rod cavity of the turnover cylinder 8 after sequentially passing through the second through flow groove 302, the first through flow groove 301 and the second working oil port B, pushes the turnover cylinder 8 to retract to drive the plough beam to turn upwards, and the oil in the rodless cavity of the turnover cylinder 8 returns to the oil tank after sequentially passing through the first working oil port A, the third through flow groove 303, the fourth through flow groove 304 and the oil return port T.
When the turnover cylinder 8 retracts to the head, namely the plough beam is driven to reach the dead point position, the pressure of the second working oil port B rises rapidly, when the pressure rises to the set pressure of the overflow valve 1, the cone valve core 11 is opened, oil of the second working oil port B enters the main control cavity 3a through the valve port 1a, the reversing valve core 2 is pushed to move rightwards and finally moves to the right end position shown in figure 3, at the moment, the oil inlet P is communicated with the first working oil port A, the second working oil port B is communicated with the oil return port T through the first through hole 24 and the first flow passage 22, the overflow valve 1 is closed, the oil of the first working oil port A enters the main control cavity 3a through the second damping hole 32, the reversing valve core 2 is kept at the right end position, and the turnover cylinder 8 begins to extend to drive the plough beam to turn downwards.
When the reversing cylinder 8 extends to the right position, the pressure of the first working oil port a rises, so that the reversing valve core 2 is continuously kept at the position shown in fig. 3. At the moment, the electromagnetic directional valve 7 is de-energized, the pressure of the oil inlet P disappears, and the directional valve core 2 returns to the position shown in figure 1 under the action of the first spring 4 to prepare for the next turning control. Therefore, the driver can complete the automatic turnover control of the turnover plow by controlling the electric control button, and the manual intervention is not needed in the process of switching the turnover plow from the upper turnover to the lower turnover.
Claims (3)
1. A cartridge valve, characterized by: comprises that
The oil return valve comprises a valve sleeve (3), wherein an oil inlet (P), an oil return port (T), a first working oil port (A) and a second working oil port (B) are formed in the valve sleeve (3), a first channel (L1) is formed in the valve sleeve (3), a first annular through flow groove (301), a second annular through flow groove (302), a third annular through flow groove (303) and a fourth annular through flow groove (304) are formed in the first channel (L1), the first through flow groove (301) is communicated with the second working oil port (B), the second annular through flow groove (302) is communicated with the oil inlet (P), the third annular through flow groove (303) is communicated with the first working oil port (A), and the fourth annular through flow groove (304) is communicated with the oil return port (T);
the reversing valve core (2) is arranged in a first channel (L1) and can slide, a first shoulder (2a), a second shoulder (2B), a third shoulder (2c) and a fourth shoulder (2d) are arranged on the reversing valve core (2), the first channel at one end of the reversing valve core (2) forms a main control cavity (3a), the first channel at the other end of the reversing valve core (2) forms a secondary control cavity (3B), a first flow passage (22) for communicating a fourth flow passage (304) with the secondary control cavity (3B) is arranged in the reversing valve core (2), a first damping hole (21) for communicating the main control cavity (3a) with the first flow passage (22) is further arranged in the reversing valve core (2), the main control cavity (3a) is further communicated with a first working oil port (A) through a second damping hole (32) arranged in the valve sleeve (3), a second channel (L2) for communicating the second working oil port (B) with the main control cavity (3a) with the first working oil port (A) is further arranged in the valve sleeve (3), and a trend control flow hole (4) for maintaining the first flow passage (3B) communicated with the first working oil port (22) is further arranged in the valve sleeve (3);
the overflow valve (1) is arranged on the second channel (L2) and is used for normally disconnecting the second channel (L2), a first port of the overflow valve (1) is communicated with a second working oil port (B), a second port of the overflow valve (1) is communicated with a main control cavity (3a), when the pressure of the second working oil port (B) reaches a certain value, the overflow valve (1) is opened, oil flows into the main control cavity (3a) from the second working oil port (B), the overflow valve (1) comprises a cone valve core (11), a sliding sleeve (12), a second spring (13) and a threaded sleeve (14), the threaded sleeve (14) is fixedly connected to the valve sleeve (3), the second spring (13) is arranged in an inner cavity of the threaded sleeve (14), the sliding sleeve (12) is arranged in the inner hole of the valve sleeve (3) in a sliding mode, the right end of the overflow valve core (11) abuts against a step, the left end of the overflow valve (1) abuts against the second spring (13), and the cone valve core (11) keeps the trend of blocking valve port under the acting force of the second spring (13).
2. The cartridge valve of claim 1, wherein: when the reversing valve core (2) is positioned at the left end position, the first through flow groove (301) is communicated with the second through flow groove (302), and the third through flow groove (303) is communicated with the fourth through flow groove (304); when the reversing valve core (2) is at the right end position, the first through flow groove (301) is communicated with the first through flow hole (24), and the second through flow groove (302) is communicated with the third through flow groove (303).
3. The cartridge valve according to claim 1, wherein the first channel (L1) is a structure with a left end opening and a right end closed, a plug (5) is connected to the valve sleeve (3) in a threaded manner to close the left end opening of the first channel (L1), and a main control cavity (3a) is formed between the plug (5) and the reversing valve core (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810485265.3A CN108626193B (en) | 2018-05-18 | 2018-05-18 | Plug-in type valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810485265.3A CN108626193B (en) | 2018-05-18 | 2018-05-18 | Plug-in type valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108626193A CN108626193A (en) | 2018-10-09 |
| CN108626193B true CN108626193B (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810485265.3A Active CN108626193B (en) | 2018-05-18 | 2018-05-18 | Plug-in type valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108626193B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203532381U (en) * | 2013-09-24 | 2014-04-09 | 徐州重型机械有限公司 | Rotary cushion valve and rotary system of crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3502518A1 (en) * | 1985-01-25 | 1986-07-31 | Mannesmann Rexroth GmbH, 8770 Lohr | Directly controlled pressure-relief valve |
| CN101629587B (en) * | 2009-08-06 | 2011-05-11 | 宁波汉商液压有限公司 | Hydraulic balance valve |
| CN101943186A (en) * | 2009-09-21 | 2011-01-12 | 邵阳维克液压股份有限公司 | Hydraulic control valve group |
| CN101929481A (en) * | 2010-04-30 | 2010-12-29 | 北京联合大学 | Three-way pressure compensating valve for hydraulic energy-saving system |
| CN103062147B (en) * | 2013-01-24 | 2015-06-03 | 中联重科股份有限公司 | Hydraulic-control throttling valve, balance valve, engineering machine and hydraulic system for controlling winch |
| CN103470565B (en) * | 2013-09-24 | 2015-09-16 | 徐州重型机械有限公司 | The rotary system of rotary buffering valve and hoist |
| CN203641146U (en) * | 2013-12-09 | 2014-06-11 | 怀特(中国)驱动产品有限公司 | Direct-acting hydraulic threaded cartridge buffering overflow valve |
| CN203743110U (en) * | 2014-03-10 | 2014-07-30 | 杭州前进齿轮箱集团股份有限公司 | Electric control inching valve |
| CN104019073B (en) * | 2014-06-11 | 2017-08-08 | 徐州重型机械有限公司 | Stress control valve group, hydraulic system and engineering mechanical device |
-
2018
- 2018-05-18 CN CN201810485265.3A patent/CN108626193B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203532381U (en) * | 2013-09-24 | 2014-04-09 | 徐州重型机械有限公司 | Rotary cushion valve and rotary system of crane |
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| CN108626193A (en) | 2018-10-09 |
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Effective date of registration: 20200710 Address after: No.8 Shangni Industrial Zone, Luoyang street, Luqiao District, Taizhou City, Zhejiang Province Applicant after: Taizhou Luqiao Jiawei shoes and hats factory Address before: 315000 188 Jinghua Road, Ningbo high tech Zone, Zhejiang (1493 tower, 041 block B block, modern building, Ningbo harbour). Applicant before: NINGBO ZHENGE HYDRAULIC TECHNOLOGY Co.,Ltd. |
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