CN207921434U - A kind of hydraulic resistance balance adjusts the control structure of valve deck - Google Patents
A kind of hydraulic resistance balance adjusts the control structure of valve deck Download PDFInfo
- Publication number
- CN207921434U CN207921434U CN201820082372.7U CN201820082372U CN207921434U CN 207921434 U CN207921434 U CN 207921434U CN 201820082372 U CN201820082372 U CN 201820082372U CN 207921434 U CN207921434 U CN 207921434U
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- import
- valve deck
- cavity
- adjusting rod
- hydraulic resistance
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- 230000008676 import Effects 0.000 claims abstract description 73
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 7
- 239000011148 porous material Substances 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 210000004907 gland Anatomy 0.000 description 11
- 239000003921 oil Substances 0.000 description 11
- 238000007789 sealing Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008094 contradictory effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003827 upregulation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Lift Valve (AREA)
Abstract
This application involves control valve field, specially a kind of hydraulic resistance balance adjusts the control structure of valve deck, in the convenience adjusting that valve deck is adjusted for hydraulic resistance balance comprising the valve deck for providing overall installation and support, wherein：The adjusting rod for adjusting hydraulic resistance balance is equipped in cavity inside the valve deck, the both sides of cavity have been respectively communicated with the first import and the second import, and fluid is inputted into the cavity of valve deck to control the position of adjusting rod along the first import and the second import；With simple structure, the upper and lower ends of adjusting rod are respectively communicated with fluid, the outside thrust of adjusting rod is offset to reduce the thread friction power at adjusting screw rod by fluid, avoid at adjusting rod in the prior art that pressure is larger, are not easy to the effect of the situation adjusted.
Description
Technical field
This application involves control valve field, specially a kind of hydraulic resistance balance adjusts the control structure of valve deck, flat for fluid power
Weighing apparatus is adjusted in the convenience adjusting of valve deck.
Background technology
In the prior art：
Such as：Chinese patent discloses (bulletin) number：CN103671943A；The utility model is related to a kind of balance type multi-stage tune
Valve is saved, including valve body, end flanges, valve seat, flap, valve deck, holder and valve rod, holder are built-in with valve stem nut, stem lower portion
It is connect with flap top, top is equipped with control crank, is characterized in that：Inner sleeve, middle set, housing are set gradually in valve body, it is interior
Set is correspondingly provided with upper, middle, and lower part spout hole with middle set, and top spout hole and lower part spout hole are respectively multi-stage porous, housing
The top spout hole covered in correspondence opens up spout hole, and the annular groove A being connected to the spout hole of inner sleeve, middle set are offered on flap
Outer wall opens up connection its underpart spout hole and the annular groove B of middle part spout hole and is connected to upper part spout hole and housing
The annular groove C of spout hole, valve interior surface are equipped with the annular groove D of the spout hole and valve body liquid outlet of connection housing.It is solved
The problem of existing regulating valve multistage of having determined is adjusted has the advantages that keying is flexible, easy to operate, density strength is high, safe and reliable.
Balanced valve in this application is in such a way that multistage is adjusted, but oil pressure is excessively high in pipeline in specific use
When, cause the rotational pressure of regulator site larger, is not easy to adjust.
In another example：Chinese patent discloses (bulletin) number：CN103912691A；A kind of balanced type regulating valve, including valve body, valve
Seat adjusts sleeve, adjusting spool in the form of piston, pressure ring, lifting shaft, the valve deck for being sealedly attached to valve body upper end and lifting shaft upper end
Handwheel, valve body is provided with longitudinal medium entrance and lateral media outlet, and medium entrance is with media outlet by valve body
Valve chamber is connected to, and valve seat, adjusting sleeve, adjusting spool, pressure ring may be contained in valve chamber, and valve seat is connected to the bottom end of valve chamber, adjusts
Sleeve connection is set to corresponding to valve seat and adjusts in sleeve in the upper end of valve seat, adjusting spool, adjusts the difference of the side wall of sleeve
Multiple through holes are evenly arranged in height, between pressure ring is set to valve deck and adjusts sleeve, adjusting spool is provided with balance hole,
The cavity formed between valve deck and pressure ring, adjusting spool, medium entrance are connected to by balance hole with the cavity, the lower end of lifting shaft
Portion is connect with adjusting spool.The apparatus structure is reasonable, is easily assembled, and Open valve is more effortless, and spool vibrating noise is small, leakproofness
It is more reliable.
Balanced valve in this application solves vibrations and sealing problem, and the oil pressure of pipeline remained unchanged in specific use
The rotational pressure of height, regulator site is still larger, is not easy to adjust.
The above patent application is led thus since their technical solution purpose and technical problem to be solved are different
The technical solution for causing them includes the difference of structures and methods, to present patent application, otherwise they can not simply be combined
Structure design can be caused more complicated, or cannot be implemented, etc..
In consideration of it, how to design the control structure that a kind of dynamic balance adjusts valve deck, overcomes and above-mentioned deposited in the prior art
Defect, be those skilled in the art's technical problem urgently to be resolved hurrily.
Utility model content
The application's aims to overcome that the technical problems existing in the prior art, and provides a kind of dynamic balance adjusting valve deck
Control structure.
The purpose of the application is completed by following technical solution, and a kind of hydraulic resistance balance adjusts the control knot of valve deck
Structure includes the valve deck for providing overall installation and support, wherein：It is equipped in cavity inside the valve deck and adjusts hydraulic resistance balance
Adjusting rod, the both sides of cavity have been respectively communicated with the first import and the second import, along the first import and the second import to valve deck
Cavity in input fluid to offset the thrust that adjusting rod is subject to.
It is respectively equipped with connection cavity and the first intercommunicating pore of the first import on the valve deck, is connected to cavity and the second import
Second intercommunicating pore.
Adjusting rod in the valve deck is divided into tetra- sections of b, c, d, e, wherein the section of c sections and d sections respectively in cavity (t1) and
(t2) piston is formed in, wherein the first import is respectively communicated with the cavity of piston both sides with the second import.
Fluid pressure is equal to Fluid pressure in the second import (a2), but d sections of sectional area Sd in first import (a1)
Slightly larger than c sections annulus area Scb=Sc-Sb push adjusting rod (5) upward so the thrust difference of the two generates upward thrust
Movement, it is ensured that adjusting rod is in uppermost position.
It is communicated with third connecting hole between first import and the second import.
The third connecting hole is arranged on valve deck, and the outer wall of valve deck is equipped with the import of input fluid, is also set on valve deck
There is the 4th intercommunicating pore of connection import and third connecting hole.
The positions of the b sections of the adjusting rod (5) and c sections of handing-over is formed with the first working surface (Scb), d sections of sectional areas
Position is formed with the second working surface (Sd), and the area of the first working surface (Scb) is slightly less than the face of the second working surface (Sd)
Product.
The cavity includes the first cavity, the second cavity, third cavity for being sequentially communicated arrangement, the first import and third chamber
Body is connected to, and the second import is connected to the first cavity.
The valve deck is equipped with the gland for closing adjusting rod installation site.
The screw rod for contradicting adjusting rod top is equipped in the gland.
Contact form between the screw rod bottom end and adjusting rod top is point contact.
The screw rod bottom end is the arc surface outwardly protruded, the arc surface that adjusting rod top is a flat surface or outwardly protrudes.
The top of the screw rod is equipped with for adjusting its handwheel rotated.
The position of the lateral wall of the screw rod and gland handing-over is equipped with nut.
The application compared with prior art, at least has following obvious advantage and effect：
1, using simple structure, the upper and lower ends of adjusting rod are respectively communicated with fluid, by fluid to adjusting rod by
Upward thrust is offset, and avoids at adjusting rod in the prior art that pressure is larger, is not easy to the situation adjusted.
2, the valve deck in the structure uses integrated design, selection convenience, manufacture easy to produce, low cost to be easy to general
And.
3, the frictional force significantly reduced between the screw thread and screw rod of gland is greatly subtracted by the way of point contact
Friction between small screw bottom and adjusting rod top improves the convenience of handwheel rotation.
Description of the drawings
Attached drawing described herein is used for providing further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please do not constitute the improper restriction to the application for explaining the application.In the accompanying drawings：
Fig. 1 is the overall structure diagram of the application.
Fig. 2 is the fundamental diagram in the application.
Token name claims in attached drawing：
Specific implementation mode
To keep the purpose, technical scheme and advantage of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under the premise of creative work, shall fall in the protection scope of this application.
A kind of hydraulic resistance balance described herein adjusts the control structure of valve deck, including is used to provide overall installation and branch
The valve deck 6 of support, wherein：The adjusting rod 5 for adjusting hydraulic resistance balance, the both sides point of cavity t are equipped in cavity t inside the valve deck 6
It is not communicated with the first import a1 and the second import a2, is inputted into the cavity t of valve deck 6 along the first import a1 and the second import a2
Fluid is for offsetting the upward thrust of part adjusting rod 5；With simple structure, the upper and lower ends of adjusting rod are respectively communicated with stream
Body realizes the fluid regulation mode of convenience, avoids at adjusting rod in the prior art that pressure is larger, is not easy to the situation adjusted
Effect.
In the embodiment of the present application, shown in Fig. 1 to Fig. 2, the fluid in application is worked using pressure oil；Work as P
Mouthful pilot pressure oil via pilot valve D10 must not electric control when, pilot pressure oil from P mouths of pilot valve D10 inflow import a it
After divide two-way to respectively enter the first import a1 and the second import a2, wherein the first import a1 acts on the lower parts cavity t third cavity
In t3.
Wherein, the first worksheet area Scb that the annulus area of the second 5 upper end of import a2 control adjusting rods is formed, effect
The first downward thrust Fcb is formed in the power of adjusting rod 5.
It is pushed along the second worksheet area Sd of 5 downside of adjusting rod, the power that pressure oil acts on adjusting rod 5 is upward
It is Fd to form the second thrust.
At this point, the c sections in 5 centre position of adjusting rod form piston structure, shape between c sections and the first cavity t1 in cavity t
At the sliding of stickiness, than first working surface on top when the second worksheet area Sd of the lower part formation of adjusting rod 5 is designed
Product Scb is slightly larger, i.e. Fd ratios Fcb is slightly larger, i.e. Fd and Fcb resultant force are exerted oneself Fd upwards and much smaller than original work, so that high degree subtracts
Interface pressure between small 2 bottom end of 5 top of adjusting rod and screw rod, the frictional force between screw rod 2 and screw thread is transferred to by adjusting rod 5
Also it reduces simultaneously, the reduction of pressure reduces frictional force, while the reduction of contact surface also reduces frictional force between the two simultaneously, by two
Contact between person is set as the form of point contact.
With the comparison of prior embodiment：
The prior art：In the case where pilot pressure oil pressure force value is in 150bar simultaneously, tune in the prior art is measured
Required torsion is 55Nm or more when section structure adjusting, and artificial directly adjustment adjusting handle 1 can not be adjusted；Current adjustment structure up-regulation
Required torsion is measured when section can be adjusted between 7-8Nm, manually adjust 1 very comfortable of adjusting handle.
When P mouthfuls of pilot pressure oils obtain electric control via pilot valve D10, P mouth of the pilot pressure oil in pilot valve D10 is in
Closed state, and lower part the first import a1 of the cavity t of valve deck, adjusting rod 5 and the second import of top a2 are with pilot valve D10's
Import a is connected, and forms the T-shaped structure of refluxing opening in pilot valve D10 at this time, the pressure oil in cavity t through the second import a2 with
First import a1 flows into import a and is back to fuel tank, so that the spool of 5 downside of adjusting rod is in open state, adjusting rod 5 is maintained at chamber
The tops body t, therefore adjusting rod 5 does not generate delay to the unlatching response of spool.
In the another embodiment of the application, a kind of control structure of hydraulic resistance balance adjusting valve deck, including be used to provide totality
The valve deck 6 of installation and support, wherein：The adjusting rod 5 for adjusting hydraulic resistance balance, cavity t are equipped in cavity t inside the valve deck 6
Both sides be respectively communicated with the first import a1 and the second import a2, the upper and lower ends of valve deck 6 be respectively set an oil inlet or
Air inlet, can be to the adjusting rod 5 of piston like motion in cavity t using the difference in areas between the first import a1 and the second import a2
Thrust is offset.
Cavity t is not shown, and cavity is the cavity in valve deck 6, by the first cavity t1, the second cavity t2, third chamber
Body t3 compositions.
Wherein, fluid is inputted into the cavity t of valve deck 6 along the first import a1 and the second import a2 for controlling adjusting rod
5 position, the thrust that can be subject to the piston type adjusting rod 5 in valve deck 6 using compressed gas, water or grease are supported
Disappear.
It is respectively equipped with connection cavity t and the first intercommunicating pore 61 of the first import a1 on the valve deck 6, is connected to cavity t and the
The second intercommunicating pore 62 of two import a2.
Through-hole i.e. the first intercommunicating pore 61 and the second intercommunicating pore 62 that two bar shapeds are drilled out on valve deck 6, utilize the first intercommunicating pore
61 by the fluid conveying of the first import a1 to the lower parts cavity t, by the second intercommunicating pore 62 by the fluid conveying of the second import a2
Into the tops cavity t, adequately using valve deck 6 structure design of itself go out to control adjusting rod 5 in the way of, reduction production cost.
Adjusting rod 5 in the valve deck 6 divide for b, c, d, tetra- sections of e,
B is first segment structure on 5 top of adjusting rod, and c is the second segment structure of upper position in adjusting rod 5, and d is adjusting rod 5
In lower position third segment structure, e is the 4th segment structure of 5 bottom end of adjusting rod.
Wherein, adjusting rod 5 is set as to form different effects by different section using the design of segmentation, using section with
Structure between section, which forms piston, has the effect of up and down adjustment, using mutual diameter difference, and then forms step structure, platform
The size of rank is different, forms different size of working surface.
Wherein, c sections of section forms piston in cavity t, ensures that it is slided up and down using the structure of piston.
First import a1 and the second import a2 is respectively communicated with the cavity t of piston both sides, is pushed respectively along the both sides of piston
It moves up and down in cavity t.
Piston sealing structure is formed using between the c sections and the side wall of valve deck 6 of adjusting rod 5, is set in the c sections of adjusting rod 5
Sealing ring is set, the leakproofness of piston is improved, the smooth side wall of valve deck 6 is centered around on c sections of sealing ring, and then forms the close of stabilization
Seal effect.
Fluid pressure is equal to Fluid pressure in the second import (a2), but d sections of sectional area Sd in first import (a1)
Slightly larger than c sections annulus area Scb=Sc-Sb push adjusting rod (5) upward so the thrust difference of the two generates upward thrust
Movement, it is ensured that adjusting rod is in uppermost position.
It is communicated with third connecting hole 63 between the i.e. described first import a1 and the second import a2, and then makes the pressure phase of the two
Deng designing and form different worksheet areas.
Wherein, the third connecting hole 63 is arranged on valve deck 6, and the outer wall of valve deck 6 is equipped with the import a of input fluid,
The 4th intercommunicating pore 64 of connection import a and third connecting hole 63 is additionally provided on valve deck 6.
The position that the b sections of the adjusting rod 5 join with c sections is formed with the first working surface Scb, the first working surface Scb
The Fluid pressure at the second import a2 is accepted, the d sections of positions joined with e sections are formed with the second working surface Sd, the second worksheet
Face Sd accepts the Fluid pressure at the first import a1, using the area of the first working surface Scb less than the second working surface Sd's
Area, at this point, identical pressure duty area difference makes adjusting rod 5 move upwards and rests on the top of cavity t, in adjusting rod
5 be adjusted with switching when, up-down vibration will not occur for adjusting rod 5.
The cavity t includes the first cavity t1, the second cavity t2, third cavity t3 for being sequentially communicated arrangement, the first import
A1 is connected to third cavity t3, and the second import a2 is connected to the first cavity t1.
The valve deck 6 is equipped with gland 4 for closing 5 installation site of adjusting rod, using gland 4 by the top of valve deck 6
Closing is fallen, and the space at 5 top of adjusting rod is closed by gland 4, ensures the operation stablized in cavity t that adjusting rod 5 is stablized.
The screw rod 2 for contradicting 5 top of adjusting rod is equipped in the gland 4.Screw rod 2 is set in gland 4, passes through screw rod
2 with the screw-thread fit in 4 centre position of gland, realize that the rotation of adjusting rod 5 is adjusted.
Contact form between 5 top of 2 bottom end of the screw rod and adjusting rod is point contact.It, can by the way of point contact
To reduce the contact area on 5 top of adjusting rod and 2 bottom end of screw rod as far as possible, the convenience that screw rod 2 rotates is improved.
2 bottom end of the screw rod is the arc surface outwardly protruded, the circular arc that 5 top of adjusting rod is a flat surface or outwardly protrudes
Face.It is set as arc-shaped structure, 2 bottom end of screw rod is made to form the surface of point contact.Adequately reduce by 5 top of adjusting rod and screw rod
The friction coefficient of 2 bottom ends.
The top of the screw rod 2 is equipped with for adjusting its handwheel 1 rotated, using handwheel 1 to the position of screw rod 2 into
Row rotation is adjusted.
The position that the lateral wall of the screw rod 2 and gland 4 joins is equipped with nut 3, is coordinated by nut 3 and screw rod 2, in spiral shell
After bar 2 is adjusted, locked by nut 3.
Above is only an example of the present application, moreover, the title that parts are taken in the application can not also
Together, the title being not intended to limit in the application.To those skilled in the art, the application can have various modifications and variations.
All any modification, equivalent replacement, improvement and so within the design of the application and principle, should be included in the power of the application
Within sharp claimed range.
Claims (8)
- Include the valve deck for providing overall installation and support 1. a kind of hydraulic resistance balance adjusts the control structure of valve deck（6）, special Sign is：The valve deck（6）Internal cavity（t）In be equipped with adjust hydraulic resistance balance adjusting rod（5）, cavity（t）Both sides point It She You not the first import（a1）With the second import（a2）, along the first import（a1）With the second import（a2）To valve deck（6）Chamber Body（t）Middle input fluid is to control adjusting rod（5）Outside thrust.
- 2. hydraulic resistance balance adjusts the control structure of valve deck according to claim 1, it is characterised in that：The valve deck（6）Upper point Cavity She You be connected to（t3）With the first import（a1）The first intercommunicating pore（61）, connection cavity（t1）With the second import（a2）'s Second intercommunicating pore（62）.
- 3. hydraulic resistance balance according to claim 1 or claim 2 adjusts the control structure of valve deck, it is characterised in that：The valve deck（6）In Adjusting rod（5）It is divided into tetra- sections of b, c, d, e, wherein c sections and d sections of section is respectively in cavity（t1）With（t2）Middle formation piston, Wherein, the first import（a1）With the second import（a2）It is respectively communicated with the cavity of piston both sides（t）.
- 4. hydraulic resistance balance adjusts the control structure of valve deck according to claim 3, it is characterised in that：First import（a1） Middle Fluid pressure is equal to the second import（a2）Middle Fluid pressure, but d sections of sectional area Sd is slightly larger than c sections of annulus area Scb=Sc- Sb pushes adjusting rod so the thrust difference of the two generates upward thrust（5）It moves upwards, it is ensured that adjusting rod is in the top Position.
- 5. hydraulic resistance balance adjusts the control structure of valve deck according to claim 2, it is characterised in that：First import（a1） With the second import（a2）Between be communicated with third connecting hole（63）.
- 6. hydraulic resistance balance adjusts the control structure of valve deck according to claim 5, it is characterised in that：The third connecting hole （63）It is arranged in valve deck（6）On, valve deck（6）Outer wall be equipped with input fluid import（a）, valve deck（6）On be additionally provided with connection Import（a）With third connecting hole（63）The 4th intercommunicating pore（64）.
- 7. hydraulic resistance balance adjusts the control structure of valve deck according to claim 4, it is characterised in that：The adjusting rod（5）B The position that section joins with c sections is formed with the first working surface（Scb）, d sections of sectional areas position be formed with the second working surface （Sd）, the first working surface（Scb）Area be slightly less than the second working surface（Sd）Area.
- 8. hydraulic resistance balance adjusts the control structure of valve deck according to claim 1, it is characterised in that：The cavity（t）Including It is sequentially communicated the first cavity of arrangement（t1）, the second cavity（t2）, third cavity（t3）, the first import（a1）With third cavity （t3）Connection, the second import（a2）With the first cavity（t1）Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820082372.7U CN207921434U (en) | 2018-01-18 | 2018-01-18 | A kind of hydraulic resistance balance adjusts the control structure of valve deck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820082372.7U CN207921434U (en) | 2018-01-18 | 2018-01-18 | A kind of hydraulic resistance balance adjusts the control structure of valve deck |
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| Publication Number | Publication Date |
|---|---|
| CN207921434U true CN207921434U (en) | 2018-09-28 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820082372.7U Active CN207921434U (en) | 2018-01-18 | 2018-01-18 | A kind of hydraulic resistance balance adjusts the control structure of valve deck |
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| Country | Link |
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| CN (1) | CN207921434U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180306A (en) * | 2018-01-18 | 2018-06-19 | 宁波海天金属成型设备有限公司 | A kind of hydraulic resistance balance adjusts the control structure of valve deck |
-
2018
- 2018-01-18 CN CN201820082372.7U patent/CN207921434U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180306A (en) * | 2018-01-18 | 2018-06-19 | 宁波海天金属成型设备有限公司 | A kind of hydraulic resistance balance adjusts the control structure of valve deck |
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Address after: 12 / F, building 1, 32 Jiangnan Middle Road, Xiaogang, Beilun District, Ningbo City, Zhejiang Province Patentee after: Ningbo Haitian Zhisheng Trading Co.,Ltd. Country or region after: China Address before: 12 / F, building 1, 32 Jiangnan Middle Road, Xiaogang, Beilun District, Ningbo City, Zhejiang Province Patentee before: NINGBO HAITIAN DIE CASTING EQUIPMENTS Co.,Ltd. Country or region before: China |
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Effective date of registration: 20240418 Address after: No. 8-1 Lingshan Road, Daqi Street, Beilun District, Ningbo City, Zhejiang Province, 315000 Patentee after: Ningbo Free Trade Zone Haitian Zhisheng metal forming equipment Co.,Ltd. Country or region after: China Address before: 12 / F, building 1, 32 Jiangnan Middle Road, Xiaogang, Beilun District, Ningbo City, Zhejiang Province Patentee before: Ningbo Haitian Zhisheng Trading Co.,Ltd. Country or region before: China |