CN109263114A - A kind of horizontal oil cylinder hydraulic machine - Google Patents

A kind of horizontal oil cylinder hydraulic machine Download PDF

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Publication number
CN109263114A
CN109263114A CN201710585256.7A CN201710585256A CN109263114A CN 109263114 A CN109263114 A CN 109263114A CN 201710585256 A CN201710585256 A CN 201710585256A CN 109263114 A CN109263114 A CN 109263114A
Authority
CN
China
Prior art keywords
oil cylinder
support
mail
master
cylinder
Prior art date
Application number
CN201710585256.7A
Other languages
Chinese (zh)
Inventor
黄进
Original Assignee
董祥义
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 董祥义 filed Critical 董祥义
Priority to CN201710585256.7A priority Critical patent/CN109263114A/en
Priority claimed from JP2019559785A external-priority patent/JP2020518459A/en
Publication of CN109263114A publication Critical patent/CN109263114A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B1/00Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/32Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing

Abstract

The invention discloses a kind of horizontal oil cylinder hydraulic machines, comprising: support component;Mail oil cylinder device, the mail oil cylinder device includes at least one group of master cylinder component, the master cylinder component includes two master cylinders being arranged back-to-back, master cylinder is equipped with one or a set of one-way piston bar, two master cylinders being arranged back-to-back are fixedly connected, and the piston rod of two master cylinders reversely stretches each other, the mail oil cylinder device is slidably connected with support component;Support table device, the support table device includes at least two one plane type support table assemblies that can bear same pressure, the one plane type support table assembly is connect with support component, there are certain distances between two one plane type support table assemblies, and between one plane type support table assembly for mail oil cylinder device setting.The present invention is arranged same pressure master cylinder cylinder body and is placed as one or more groups of, the opposite direction active force of cylinder body back-to-back, and pressure of itself cancelling out each other realizes hydraulic machine equipment unitary design.

Description

A kind of horizontal oil cylinder hydraulic machine

Technical field

The invention belongs to technical field of hydraulic pressure, specifically, being related to a kind of horizontal oil cylinder hydraulic machine.

Background technique

Higher and higher to the performance and demand of automotive hub with the development of automobile industry, forming manufacture technique is complicated, Great tonnage hydraulic equipment is needed to carry out multiple hydro-forming, so capital input is at high cost, how to reduce production cost, improves life Producing efficiency is to restrict the principal element of industry development.Therefore the hydraulic device mainly produced is improved as the emphasis developed now.

Currently, hydraulic press is divided into frame-type, three beam four-column types, wound form three types, it is self-possessed respectively for 10000 tons Of about 800 tons, 300 tons, 260 tons.Wound form is that frame mode most light at present enhances its with steel wire winding on frame Intensity, and hydraulic press is all independent vertical and horizontal structure

In conclusion current hydraulic device, there are tonnage weight cost of investment is very high, manufacture is complicated, in the market currently without The appearance of Multi-station integral hydraulic device.

In view of this present invention is specifically proposed.

Summary of the invention

The technical problem to be solved in the present invention is that a kind of horizontal oil cylinder hydraulic machine is overcome the deficiencies of the prior art and provide, In order to solve the above technical problems, the present invention is using the basic conception of technical solution:

A kind of horizontal oil cylinder hydraulic machine, comprising:

Support component;

Mail oil cylinder device, the mail oil cylinder device include at least one group of master cylinder component, and the master cylinder component includes two A master cylinder being arranged back-to-back, master cylinder are equipped with one or a set of one-way piston bar, and two master cylinders being arranged back-to-back are solid Fixed connection, and the piston rod of two master cylinders reversely stretches each other, the mail oil cylinder device is slidably connected with support component;

Table device is supported, the support table device includes at least two one plane type branch that can bear same pressure Table assembly is supportted, the one plane type support table assembly is connect with support component, and mail oil cylinder device is arranged in two single sides Formula supports between table assembly, and there are certain distances between one plane type support table assembly;

The piston rod of described two master cylinders is stretched out from mail oil cylinder device, is formed and is pressed with one plane type support table assembly Mechanism, and cause the mail oil cylinder device sliding until mail oil cylinder device stops displacement.

Further, the master cylinder includes oil cylinder set, oil cylinder front cover, oil cylinder rear cover, piston rod, and the oil cylinder set is circle Tubular, oil cylinder front cover and oil cylinder rear cover are circle, and the oil cylinder front cover, oil cylinder rear cover block oil cylinder set both ends respectively, described Oil cylinder front cover is equipped with piston rod through-hole, and in oil cylinder set, the other end is pierced by from piston rod through-hole for piston rod one end setting.

Further, the support component is equipped with sliding rail, and the mail oil cylinder device is connected by sliding rail and support component sliding It connects, the sliding rail is at least one, and the glide direction of sliding rail and the piston rod telescopic direction of mail oil cylinder device are same axial direction.

Further, the sliding rail is formed by several club laid out in parallel.

Further, the mail oil cylinder device is slidably connected by column beam guide sleeve with support component.

Further, the mail oil cylinder device includes at least two groups of master cylinder components, and two groups of master cylinder components are coaxial Setting, the support table device include at least one two-way type support table assembly, and the two-way type supports workbench Component includes two stationary work-tables for being reversely coaxially disposed and linking together, and is arranged between two groups of master cylinder components.

Further, the stationary work-table is equipped with T-slot, centre bore liftout attachment.

Further, the two-way type support table assembly and support component, which are slided or rolled, connects.

Further, the support table device includes movable table, and the movable table is connect with piston rod, The movable table is equipped with T-slot, centre bore liftout attachment.

Further, the one plane type support table assembly includes a stationary work-table, and the stationary work-table is set There are T-slot, centre bore liftout attachment.

After adopting the above technical scheme, the present invention has the advantages that compared with prior art.

The present invention is arranged same pressure master cylinder cylinder body and is placed as one or more groups of, the opposite direction effect of cylinder body back-to-back Power, pressure of itself cancelling out each other, while both ends are realized hydraulic press and set by the support construction of uniform pressure, synchronization action Standby unitary design, intermediate master cylinder use pressure of itself cancelling out each other to reduce the support of frame power back-to-back, and when stress Overall mechanism is equipped with buffering mobile space and realizes that adjust automatically keeps both ends stress identical.

The present invention mitigates 80% weight than traditional frame structure, mitigates 60% weight, while equipment than winding arrangement It takes up space small, save space space, effectively improves processing efficiency, reduces manufacturing cost.

Structure of the invention is reasonable, simple structure, practical, is conducive to equipment promotion application.

A specific embodiment of the invention is described in further detail with reference to the accompanying drawing.

Detailed description of the invention

The a part of attached drawing as the application, for providing further understanding of the invention, of the invention is schematic Examples and descriptions thereof are used to explain the present invention, but does not constitute an undue limitation on the present invention.Obviously, the accompanying drawings in the following description Only some embodiments to those skilled in the art without creative efforts, can be with Other accompanying drawings can also be obtained according to these attached drawings.In the accompanying drawings:

Fig. 1 is one embodiment of the invention structural schematic diagram;

Fig. 2 is further embodiment of this invention structural schematic diagram;

Fig. 3 is mail oil cylinder device mounting structure schematic diagram one of the present invention;

Fig. 4 is mail oil cylinder device mounting structure schematic diagram two of the present invention;

Fig. 5 is that one plane type of the present invention supports table assembly structural schematic diagram;

Fig. 6 is that two plane type of the present invention supports table assembly structural schematic diagram;

Fig. 7 is skid rail structure diagram of the present invention.

In figure: 1- support component;2- mail oil cylinder device;3- one plane type supports table assembly;4- sliding rail;5- active operation Platform;6- stationary work-table;7- centre bore liftout attachment;8-T type groove;9- two-way type supports table assembly;10- fixing belt;21- Oil cylinder set;22- oil cylinder front cover;23- oil cylinder rear cover;24- piston rod.

It should be noted that these attached drawings and verbal description are not intended to the design model limiting the invention in any way It encloses, but illustrates idea of the invention by referring to specific embodiments for those skilled in the art.

Specific embodiment

In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, the technical solution in embodiment is clearly and completely described, the following examples are intended to illustrate the invention, but It is not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that term " on ", "front", "rear", "left", "right", " is erected at "lower" Directly ", the orientation or positional relationship of the instructions such as "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with Specific orientation construction and operation, therefore be not considered as limiting the invention.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected;It can To be mechanical connection, it is also possible to be electrically connected;It can be directly connected, it can also be indirectly connected through an intermediary.For this For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.

Embodiment one

As shown in Figure 1, a kind of horizontal oil cylinder hydraulic machine described in the present embodiment, including support component 1, mail oil cylinder device 2, One plane type supports table assembly 3, and support component 1 is used as support substrate, and mail oil cylinder device 2, one plane type support table assembly 3 It being installed in support component 1, wherein the two ends of support component 1 install an one plane type support table assembly 3 respectively, It should be noted that two one plane types support table assembly 3 here is same material, same technique production guarantees Two one plane type support table assemblies 3 are able to bear uniform pressure.

Both the setting of mail oil cylinder device 2 is between two one plane type support table assemblies 3, especially, master cylinder is located at Midpoint, mail oil cylinder device 2 include two master cylinders being arranged back-to-back, and master cylinder is equipped with one or a set of one-way piston bar 24, wherein master cylinder includes that oil cylinder covers 21, oil cylinder front cover 22, oil cylinder rear cover 23, piston rod 24, and oil cylinder set 21 is cylindrical shape, oil Cylinder front cover 22 and oil cylinder rear cover 23 are circle, and oil cylinder front cover 22, oil cylinder rear cover 23 block oil cylinder respectively and cover 21 both ends, before oil cylinder Lid 22 is equipped with 24 through-hole of piston rod, and in oil cylinder set 21, the other end is pierced by the setting of 24 one end of piston rod from 24 through-hole of piston rod.

Two back-to-back master cylinders, which interconnect, to be fixed, so that the piston rod 24 of two master cylinders is respectively towards coaxial Reversed flexible, there are a distances between piston rod 24 and one plane type the support table assembly 3 of master cylinder.It is noted that this In the piston rod 24 said can be single piston rod 24, be also possible to multiple piston rods 24 and form one group of form.

When work, original part to be pressed is placed between piston rod 24 and one plane type support table assembly 3, master cylinder is started Driving device, piston rod 24 is gradually close to one plane type support table assembly 3, since two master cylinders are device of the same race, two lists It is device of the same race that face formula, which supports table assembly 3, therefore the original part that can realize two sides pressing is guaranteed two by an equal amount of pressure Lateral pressure is consistent, realizes that all-in-one machine quickly produces.

Embodiment two

As shown in Figure 1, Figure 7 shows, the present embodiment is further limiting for above-described embodiment one, and hydraulic press also wraps in the present embodiment Sliding rail 4 is included, sliding rail 4 is arranged in support component 1, and mail oil cylinder device 2 is slidably connected by sliding rail 4 with support component 1.Wherein, The glide direction of sliding rail 4 and 24 telescopic direction of piston rod of mail oil cylinder device 2 are same axial direction, and sliding rail 4 is arranged side by side by several clubs Arrangement is formed, it is preferable that sliding rail 4 is two, and it is concave structure that support component 1, which supports the position of mail oil cylinder device 2, with master cylinder Outer wall fitting, sliding rail 4 is on the recess.At work, the flexible pressing original part of the piston rod 24 of two master cylinders, due to main oil The slidability of cylinder, it is ensured that the absolute equilibrium of the compression of 2 two sides of mail oil cylinder device has fully ensured that compression is consistent.

Embodiment three

As shown in Figures 2 to 7, a kind of horizontal oil cylinder hydraulic machine described in the present embodiment, including support component 1, master cylinder Device 2, support table device, sliding rail 4, wherein master cylinder includes two groups of master cylinders being arranged back-to-back, and master cylinder is equipped with one A or one group of one-way piston bar 24, wherein master cylinder includes that oil cylinder covers 21, oil cylinder front cover 22, oil cylinder rear cover 23, piston rod 24, Oil cylinder set 21 is cylindrical shape, and oil cylinder front cover 22 and oil cylinder rear cover 23 are circle, and oil cylinder front cover 22, oil cylinder rear cover 23 block respectively Oil cylinder cover 21 both ends, oil cylinder front cover 22 be equipped with 24 through-hole of piston rod, 24 one end of piston rod setting oil cylinder set 21 in, the other end from 24 through-hole of piston rod is pierced by.

Support table device includes one plane type support table assembly 3, two sides support table assembly, movable table 5, movable table 5 is mounted on the extension end of main oil cylinder piston bar 24;It includes a regular worker that one plane type, which supports table assembly 3, Make platform 6, one plane type support table assembly 3 is directly fixedly mounted on the two ends of support component 1;Two sides supports table assembly Including two stationary work-tables 6, two 6 Opposite direction connections of stationary work-table, the workbench of original part can be supported by forming two sides. Movable table is equipped with T-slot 8, centre bore liftout attachment 7, and stationary work-table is equipped with T-slot 8, centre bore liftout attachment 7.

Sliding rail 4 is arranged in support component 1, and mail oil cylinder device 2, two sides are supported table assembly and support group by sliding rail 4 Part 1 is slidably connected, and the glide direction of sliding rail 4 and 24 telescopic direction of piston rod of mail oil cylinder device 2 are same axial direction, master cylinder dress It sets 24 telescopic direction of non-piston rod that 2 can limit mail oil cylinder device 2 by fixing belt 10 to be displaced, sliding rail 4 is arranged side by side by several clubs Arrangement is formed, it is preferable that sliding rail 4 is two, and it is concave structure that support component 1, which supports the position of mail oil cylinder device 2, with master cylinder Outer wall fitting, sliding rail 4 is on the recess.

The constructional device of the present embodiment is followed successively by one plane type support table assembly 3, back-to-back two masters from left to right Oil cylinder, two-way type support 9 component of workbench, back-to-back two master cylinders, one plane type support table assembly 3 are inline, Certain distance is kept between movable table 5 and stationary work-table 6, forms four movable tables 5 and 6 phase of stationary work-table altogether Pair pressing structure, while pressing can be provided for four original parts.

When work, original part is placed between movable table 5 and stationary work-table 6, is started to master cylinder, master cylinder Piston rod 24 stretches out, and drives movable table 5 to stationary work-table 6 close to pressing, since back-to-back two master cylinders can be in cunning The sliding of rail 4, two-way type support 9 component of workbench can also slide on sliding rail 4, therefore may eventually form a coaxial isobaric shape State guarantees the original part stress equalization being pressurized so that four pressing structures keep same pressure size.

Master cylinder back-to-back type structure of the invention, 24 both ends direction of two sides multiple groups piston rod movement, is placed in support frame On, support frame be equipped with sliding rail 4 or trackless, and can in a limited space in move, i.e., effectively keep two sides piston rod 24 The balanced cylinder block pressure of also effectively cancelling out each other of power;Two-way type supports 9 bottom of workbench, is equipped with sliding rail 4, and can be limited Space in move, both effectively made two sides by pressure buffer and effectively offset two sides oil cylinder working-pressure and offset two-way type support Platform is by pressure, to eliminate tower structure;Support construction is designed to bear the pressure of both ends oil cylinder application in 1 both ends of support component Power is realized and replaces integral frame structure and more press unitary designs, substantially increases production efficiency.

The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, though So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this patent Member without departing from the scope of the present invention, when the technology contents using above-mentioned prompt make it is a little change or be modified to The equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content, it is right according to the technical essence of the invention Any simple modification, equivalent change and modification made by above embodiments, in the range of still falling within the present invention program.

Claims (10)

1. a kind of horizontal oil cylinder hydraulic machine characterized by comprising
Support component;
Mail oil cylinder device, the mail oil cylinder device include at least one group of master cylinder component, and the master cylinder component includes two back The master cylinder of backrest setting, master cylinder are equipped with one or a set of one-way piston bar, and two master cylinders being arranged back-to-back are fixed to be connected It connects, and the piston rod of two master cylinders reversely stretches each other, the mail oil cylinder device is slidably connected with support component;
Table device is supported, the support table device includes at least two one plane type support works that can bear same pressure Make platform component, the one plane type support table assembly is connect with support component, and mail oil cylinder device is arranged in two one plane type branch It supports between table assembly, and there are certain distances between one plane type support table assembly;
The piston rod of described two master cylinders is stretched out from mail oil cylinder device, forms pressing machine with one plane type support table assembly Structure, and cause the mail oil cylinder device sliding until mail oil cylinder device stops displacement.
2. a kind of horizontal oil cylinder hydraulic machine according to claim 1, which is characterized in that the master cylinder include oil cylinder set, Oil cylinder front cover, oil cylinder rear cover, piston rod, the oil cylinder set is cylindrical shape, and oil cylinder front cover and oil cylinder rear cover are circle, the oil Cylinder front cover, oil cylinder rear cover block oil cylinder set both ends respectively, and the oil cylinder front cover is equipped with piston rod through-hole, and described piston rod one end is set It sets in oil cylinder set, the other end is pierced by from piston rod through-hole.
3. a kind of horizontal oil cylinder hydraulic machine according to claim 1, which is characterized in that the support component is equipped with sliding rail, The mail oil cylinder device is slidably connected by sliding rail and support component, and the sliding rail is at least one, the glide direction of sliding rail with The piston rod telescopic direction of mail oil cylinder device is same axial direction.
4. a kind of horizontal oil cylinder hydraulic machine according to claim 3, which is characterized in that the sliding rail is arranged side by side by several clubs Arrangement is formed.
5. a kind of horizontal oil cylinder hydraulic machine according to claim 1, which is characterized in that the mail oil cylinder device passes through column beam Guide sleeve is slidably connected with support component.
6. a kind of horizontal oil cylinder hydraulic machine according to claim 1, which is characterized in that the mail oil cylinder device includes at least Two groups of master cylinder components, two groups of master cylinder components coaxial arrangement, the support table device includes at least one two sides Formula supports table assembly, and two-way type support table assembly includes two and is reversely coaxially disposed and what is linked together consolidates Determine workbench, and is arranged between two groups of master cylinder components.
7. a kind of horizontal oil cylinder hydraulic machine according to claim 6, which is characterized in that the stationary work-table is equipped with T-type Slot, centre bore liftout attachment.
8. a kind of horizontal oil cylinder hydraulic machine according to claim 6, which is characterized in that the two-way type supports workbench group Part and support component are slided or are rolled and connect.
9. a kind of horizontal oil cylinder hydraulic machine according to claim 1, which is characterized in that the support table device includes Movable table, the movable table are connect with piston rod, and the movable table is equipped with T-slot, centre bore liftout attachment.
10. a kind of horizontal oil cylinder hydraulic machine according to claim 1, which is characterized in that the one plane type supports workbench Component includes a stationary work-table, and the stationary work-table is equipped with T-slot, centre bore liftout attachment.
CN201710585256.7A 2017-07-18 2017-07-18 A kind of horizontal oil cylinder hydraulic machine CN109263114A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710585256.7A CN109263114A (en) 2017-07-18 2017-07-18 A kind of horizontal oil cylinder hydraulic machine

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
CN201710585256.7A CN109263114A (en) 2017-07-18 2017-07-18 A kind of horizontal oil cylinder hydraulic machine
JP2019559785A JP2020518459A (en) 2017-07-18 2018-07-18 Hydraulic device
KR1020207000812A KR20200029445A (en) 2017-07-18 2018-07-18 Hydraulic device
MX2019010070A MX2019010070A (en) 2017-07-18 2018-07-18 Main cylinder device, and hydraulic machine for same.
PCT/CN2018/096141 WO2019015609A1 (en) 2017-07-18 2018-07-18 Main cylinder device, and hydraulic machine for same
EP18834851.0A EP3564024A4 (en) 2017-07-18 2018-07-18 Main cylinder device, and hydraulic machine for same
US16/517,545 US20190338791A1 (en) 2017-07-18 2019-07-20 Hydraulic machine

Publications (1)

Publication Number Publication Date
CN109263114A true CN109263114A (en) 2019-01-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710585256.7A CN109263114A (en) 2017-07-18 2017-07-18 A kind of horizontal oil cylinder hydraulic machine

Country Status (1)

Country Link
CN (1) CN109263114A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109847652A (en) * 2019-02-14 2019-06-07 浙江大学 A kind of single-cylinder dual-action pressure apparatus of diamond belt type press

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2864189Y (en) * 2005-11-01 2007-01-31 中南大学 Two-stage two-action hydraulic cylinder
CN201020853Y (en) * 2006-11-28 2008-02-13 比亚迪股份有限公司 Horizontal press
CN201018912Y (en) * 2007-04-23 2008-02-13 昆明烟机集团二机有限公司 Filament cutter upper-row chain horizontal compaction mechanism
CN101514714A (en) * 2009-03-20 2009-08-26 大连机床集团有限责任公司 Bilateral opposite direction fuel tank driving machine
CN101927577A (en) * 2009-06-24 2010-12-29 钱慧君 Bidirectional hydraulic press
CN201776921U (en) * 2010-07-30 2011-03-30 南通皋液液压机有限公司 Bidirectional horizontal type hydraulic machine
CN207565015U (en) * 2017-07-18 2018-07-03 董祥义 A kind of horizontal oil cylinder hydraulic machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2864189Y (en) * 2005-11-01 2007-01-31 中南大学 Two-stage two-action hydraulic cylinder
CN201020853Y (en) * 2006-11-28 2008-02-13 比亚迪股份有限公司 Horizontal press
CN201018912Y (en) * 2007-04-23 2008-02-13 昆明烟机集团二机有限公司 Filament cutter upper-row chain horizontal compaction mechanism
CN101514714A (en) * 2009-03-20 2009-08-26 大连机床集团有限责任公司 Bilateral opposite direction fuel tank driving machine
CN101927577A (en) * 2009-06-24 2010-12-29 钱慧君 Bidirectional hydraulic press
CN201776921U (en) * 2010-07-30 2011-03-30 南通皋液液压机有限公司 Bidirectional horizontal type hydraulic machine
CN207565015U (en) * 2017-07-18 2018-07-03 董祥义 A kind of horizontal oil cylinder hydraulic machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109847652A (en) * 2019-02-14 2019-06-07 浙江大学 A kind of single-cylinder dual-action pressure apparatus of diamond belt type press

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Effective date of registration: 20190816

Address after: No. 66 Haichuan Road, Jiangbei Hongtang Development Zone, Ningbo City, Zhejiang Province, 315000

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Address before: 315000 Yijingge 6B2, 288 Yucai Road, Jiangbei District, Ningbo City, Zhejiang Province

Applicant before: Dong Xiangyi