CN110075597A - A kind of vibrating screen - Google Patents
A kind of vibrating screen Download PDFInfo
- Publication number
- CN110075597A CN110075597A CN201910268262.9A CN201910268262A CN110075597A CN 110075597 A CN110075597 A CN 110075597A CN 201910268262 A CN201910268262 A CN 201910268262A CN 110075597 A CN110075597 A CN 110075597A
- Authority
- CN
- China
- Prior art keywords
- support bar
- sieve plate
- support
- filtering sieve
- plate
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000001914 filtration Methods 0.000 claims abstract description 59
- 238000013016 damping Methods 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 15
- 238000005553 drilling Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003139 buffering effect Effects 0.000 abstract description 4
- 238000005096 rolling process Methods 0.000 abstract 1
- 230000007306 turnover Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
- B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
- B01D33/0346—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements
- B01D33/0353—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements self-supporting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/52—Regenerating the filter material in the filter by forces created by movement of the filter element
Abstract
The invention discloses a kind of vibrating screens, belong to drilling mud filtration art, including support frame, the both ends of support frame as described above top side are all provided with first support bar, the top of support frame as described above is all provided with second support bar far from the both ends of first support bar side, fixed plate is provided at the top of the first support bar and second support bar, the top of the fixed plate is provided with feed hopper close to the side of first support bar, and the bottom of the feed hopper is provided with feed pipe.The present invention is fixed filtering sieve plate by the mutual cooperation of screw rod and threaded hole, to realize the adjustment to filtering sieve plate tilt angle, when tilt angle is increasing, the rate that particle tumbles is getting faster, to improve work efficiency, and the effect of buffering is played to support column and filtering sieve plate by the first spring and second spring, and generate certain opposition, to preferably make particle turn over rolling in filtering sieve plate, filter screen is blocked so as to avoid particle.
Description
Technical field
The present invention relates to drilling mud filtration art, specially a kind of vibrating screen.
Background technique
Drilling fluid is the various circulation of fluid general names for meeting drilling well need of work in drilling process with its multiple functions, is bored
Well liquid is the blood of drilling well, also known as drilling fluid, and drilling fluid can be divided into clear water, mud, free clay phase by constituent and rinse
Liquid, emulsion, foam and compressed air etc..
Wherein contain a large amount of particulate matter in mud, be easy to keep mixed drilling fluid concentration poor, and mixes unevenly,
To need to be filtered mud, and existing filtering slurry generally uses shaker vibration, however existing vibration makes
The tilt angle of vibrating screen can not be adjusted during, so that the rate for tumbling particle is more slow, to drop
Low working efficiency, and during vibration, particle is easy blocking filter screen, to reduce the service life of filter screen.
Summary of the invention
It is an object of the invention to: it during use can not be to the inclination angle of vibrating screen in order to solve existing vibration
Degree is adjusted, so that the rate for tumbling particle is more slow, to provide a kind of vibration the problem of reducing working efficiency
Sieve.
To achieve the above object, the invention provides the following technical scheme: a kind of vibrating screen, including support frame, the support
The both ends of top of the trellis side are all provided with first support bar, the top of support frame as described above far from the both ends of first support bar side all
It is provided with second support bar, fixed plate, the top of the fixed plate are provided at the top of the first support bar and second support bar
Portion is provided with feed hopper close to the side of first support bar, and the bottom of the feed hopper is provided with feed pipe, the fixed plate
Top is provided with support plate far from the side of feed hopper, and the both ends at the top of the support plate are all equipped with cylinder, the cylinder
Output end is all provided with the push rod being through to below fixed plate, first support bar described in two groups close to the side of second support bar all
It is provided with support column, the two sides of the support column are all provided with damping, the adjacent position setting of support column described in two groups
There is filtering sieve plate, the both ends of the filtering sieve plate are all provided with pin shaft, support column described in two groups close to the side of first support bar
It is all fixed with limit plate close to the side of second support bar, the both ends of the filtering sieve plate are all set close to the side of second support bar
It is equipped with the second sliding block, the top and bottom of limit plate described in two groups are all provided with second spring, set at the top of the filtering sieve plate
It is equipped with filter screen.
Preferably, the damping includes sliding slot, and the number of sliding slot is four groups, and the sliding slot is all located at the first support
Bar and the adjacent side of second support bar, the bottom end inside the sliding slot are all provided with telescopic sleeving rod, the telescopic sleeving rod it is outer
Side is all evenly arranged with the first spring of multiple groups.
Preferably, limit plate described in two groups is all provided with the cunning to match with the second sliding block close to the side of filtering sieve plate
Road, the filtering sieve plate are slidably connected by the mutual cooperation of slideway and the second sliding block with limit plate.
Preferably, the inside of the slideway is all provided with limit hole, and the limit hole is all set far from the side of filtering sieve plate
It is equipped with threaded hole.
Preferably, the limit plate is provided with the screw rod to match with threaded hole, the mistake far from the side of filtering sieve plate
Screen plate is detachably connected by the mutual cooperation of threaded hole and screw rod with limit plate.
Preferably, the filtering sieve plate is rotatablely connected by pin shaft and support column, and filters sieve plate using pin shaft as basic point
Rotating angle is 0 ° -45 °.
Preferably, the bottom of push rod described in two groups all passes through fixed block and is fixedly connected with support column.
Preferably, the two sides of support column described in two groups are all provided with the first sliding block to match with sliding slot, and described in two groups
Support column all passes through the first sliding block and the mutual cooperation of sliding slot is slidably connected with first support bar and second support bar.
Preferably, the arc-shaped structure of the feed pipe, and feed pipe is located at the top of filtering sieve plate side, the limit plate
Arc-shaped structure.
Compared with prior art, the beneficial effects of the present invention are: the present invention is by being pressed down against filtering by basic point of pin shaft
Sieve plate slides filtering sieve plate in the slideway in limit plate, when sliding into specified tilt angle, passes through screw rod and screw thread
Filtering sieve plate is fixed in the mutual cooperation in hole, to realize the adjustment to filtering sieve plate tilt angle, works as tilt angle
Increasing, the rate that particle tumbles is getting faster, to improve work efficiency, and passes through the first spring and second spring pair
Support column and filtering sieve plate play the effect of buffering, and generate certain opposition, so that particle preferably be made to filter
It rolls on sieve plate, blocks filter screen so as to avoid particle, improve the service life of filter screen.
Detailed description of the invention
Fig. 1 is main view of the invention；
Fig. 2 is structural schematic diagram of the invention；
Fig. 3 is the structural schematic diagram of present invention filtering sieve plate；
Fig. 4 is the structural schematic diagram of damping of the present invention；
Fig. 5 is the structural schematic diagram of limit plate of the present invention；
Fig. 6 is the enlarged drawing of A of the present invention；
Fig. 7 is the enlarged drawing of B of the present invention.
In figure: 1, support frame；2, first support bar；3, second support bar；4, fixed plate；5, support plate；6, cylinder；7, it pushes away
Bar；8, feed hopper；9, feed pipe；10, support column；11, sieve plate is filtered；12, damping；1201, sliding slot；1202, telescopic
Bar；1203, the first sliding block；1204, the first spring；13, limit plate；14, limit hole；15, the second sliding block；16, threaded hole；17,
Pin shaft；18, filter screen；19, screw rod；20, second spring.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Obtained by cylinder (model TCA20) mentioned in the present invention can order in market or individual.
Fig. 1-7, a kind of vibrating screen, including support frame 1 are please referred to, the both ends of 1 top side of support frame are all provided with first
The top of support rod 2, support frame 1 is all provided with second support bar 3, first support bar 2 far from the both ends of 2 side of first support bar
The top of second support bar 3 is provided with fixed plate 4, the top of fixed plate 4 is provided with charging close to the side of first support bar 2
Bucket 8, the bottom of feed hopper 8 is provided with feed pipe 9, and the top of fixed plate 4 is provided with support plate 5 far from the side of feed hopper 8, branch
The both ends at the top of fagging 5 are all equipped with cylinder 6, and the output end of cylinder 6 is all provided with the push rod 7 for being through to 4 lower section of fixed plate, and two
Group first support bar 2 is all provided with support column 10 close to the side of second support bar 3, and the two sides of support column 10 are all provided with damping
Mechanism 12, the adjacent position of two groups of support columns 10 are provided with filtering sieve plate 11, filter the both ends of sieve plate 11 close to the first support
The side of bar 2 is all provided with pin shaft 17, and two groups of support columns 10 are all fixed with limit plate 13, mistake close to the side of second support bar 3
The both ends of screen plate 11 are all provided with the second sliding block 15, the top and bottom of two groups of limit plates 13 close to the side of second support bar 3
Portion is all provided with second spring 20, and the top of filtering sieve plate 11 is provided with filter screen 18.
The present invention is adjusted by tilt angle of the actual conditions to filtering sieve plate 11, more rotates down filtering sieve plate
11, the tilt angle for filtering sieve plate 11 is bigger, and when tilt angle is increasing, the rate that particle tumbles is getting faster, thus
It improves work efficiency, and the effect of buffering is played to support column 10 and filtering sieve plate 11 by damping 12, and generate one
Fixed opposition blocks filter screen 18 so that particle preferably be made to roll on filtering sieve plate 11 so as to avoid particle,
Improve the service life of filter screen 18.
Please emphatically refering to fig. 1,2,4 and 6, damping 12 includes sliding slot 1201, and the number of sliding slot 1201 is four groups, sliding
Slot 1201 is all located at first support bar 2 and the adjacent side of second support bar 3, and the bottom end inside sliding slot 1201 is all provided with flexible
Loop bar 1202, the outside of telescopic sleeving rod 1202 are all evenly arranged with the first spring of multiple groups 1204.
This kind of vibrating screen squeezes telescopic sleeving rod 1202 by support column 10, and makes to support under the action of the first spring 1204
Column 10 resets, to preferably generate certain upward active force to support column 10, cylinder 6 is made to push the movement of support column 10 more
To be laborsaving, to reduce costs, and improve work efficiency.
Please emphatically refering to fig. 1,2,3,5 and 7, two groups of limit plates 13 are all provided with and second close to the side of filtering sieve plate 11
The slideway that sliding block 15 matches, filtering sieve plate 11 are connected by the mutual cooperation of slideway and the second sliding block 15 and the sliding of limit plate 13
It connects, the inside of slideway is all provided with limit hole 14, and limit hole 14 is all provided with threaded hole 16 far from the side of filtering sieve plate 11.
This kind of vibrating screen passes through the mutual cooperation of slideway and the second sliding block 15, makes to filter sieve plate 11 and the sliding of limit plate 13 connects
It connects, reduces frictional force, and keep the sliding for filtering sieve plate 11 more laborsaving, and by limit hole 14 preferably to filtering sieve plate 11
Inclined angle is limited, to improve utilization rate.
Please emphatically refering to fig. 1,2,3 and 7, limit plate 13 far from filtering sieve plate 11 side be provided with and 16 phase of threaded hole
The screw rod 19 matched, filtering sieve plate 11 are detachably connected by the mutual cooperation of threaded hole 16 and screw rod 19 with limit plate 13, are filtered
Sieve plate 11 is rotatablely connected by pin shaft 17 and support column 10, and filter rotation angle of the sieve plate 11 with pin shaft 17 for basic point be 0 °-
45 °, the bottom of two groups of push rods 7 all passes through fixed block and is fixedly connected with support column 10.
This kind of vibrating screen passes through the mutual cooperation of threaded hole 16 and screw rod 19, preferably makes to filter sieve plate 11 and limit plate 13
It is fixedly connected, to keep the stability of the filtering sieve plate 11 after inclination more preferable, and by being basic point with pin shaft 17, makes to filter sieve plate
11 are rotatablely connected with support column 10, to reduce frictional force, keep the effect for filtering the rotation of sieve plate 11 more preferable, and rotate more
It is laborsaving, and push rod 7 is fixedly connected with support column 10 by fixed block.
It please focus on refering to fig. 1,2 and 4, the two sides of two groups of support columns 10 are all provided with first to match with sliding slot 1201 and slide
Block 1203, and two groups of support columns 10 all pass through the mutual cooperation of the first sliding block 1203 and sliding slot 1201 and first support bar 2 and the
Two support rods 3 are slidably connected, the arc-shaped structure of feed pipe 9, and feed pipe 9 is located at the top of filtering 11 side of sieve plate, limit plate
13 arc-shaped structures.
This kind of vibrating screen passes through the mutual cooperation of the first sliding block 1203 and sliding slot 1201, makes support column 10 and first support bar
2 and second support bar 3 be slidably connected, to reduce frictional force, and slide more laborsaving, and pass through the arcuate structure of setting
Feed pipe 9, preferably convenient for charging, and the limit plate 13 of the arcuate structure by setting, preferably filtering sieve plate 11 is tilted
Angle fix, to improve the rate of benefiting from.
Working principle: it in use, being first turned out screw rod 19, separates screw rod 19 with limit plate 13, then moves down
Sieve plate 11 is filtered, filtering sieve plate 11 is rotated down with 17 basic point of pin shaft, selects corresponding limit hole by actual conditions
14, the limit hole closer to lower part, the tilt angle for filtering sieve plate 11 is bigger, to realize to filtering 11 tilt angle of sieve plate
Adjustment, when tilt angle is increasing, the rate that particle tumbles is getting faster, to improve work efficiency, is then led to
It crosses the mutual cooperation of screw rod 19 and threaded hole 16, filtering sieve plate 11 is fixed, cylinder 6 is then passed through into conducting wire and the external world
Power supply and master controller are electrically connected, and are powered on, and mud is first passed through feed hopper by auxiliary tool (such as: slush pump)
8, and the top that filter screen 18 is imported from feed pipe 9 is concentrated, while the drive push rod 7 of cylinder 6 does and moves up and down, to drive
Support column 10 does under the mutual cooperation of the first sliding block 1203 and sliding slot 1201 and moves up and down, and about 18 filter screen is driven to shake
It is dynamic, to realize the filtering to mud, while by the first spring 1204 and second spring 20 to support column 10 and filter screen
Plate 11 plays the effect of buffering, and generates certain opposition, so that particle is preferably made to roll on filtering sieve plate 11,
Filter screen 18 is blocked so as to avoid particle, improves the service life of filter screen 18.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (9)
1. a kind of vibrating screen, including support frame (1), it is characterised in that: the both ends of support frame as described above (1) top side are all provided with
The top of first support bar (2), support frame as described above (1) is all provided with the second support far from the both ends of first support bar (2) side
Bar (3) is provided with fixed plate (4) at the top of the first support bar (2) and second support bar (3), the top of the fixed plate (4)
Portion is provided with feed hopper (8) close to the side of first support bar (2), and the bottom of the feed hopper (8) is provided with feed pipe (9),
The top of the fixed plate (4) is provided with support plate (5) far from the side of feed hopper (8), the both ends at the top of the support plate (5)
It being all equipped with cylinder (6), the output end of the cylinder (6) is all provided with the push rod (7) being through to below fixed plate (4), and two groups
The first support bar (2) is all provided with support column (10) close to the side of second support bar (3), and the two of the support column (10)
Side is all provided with damping (12), and the adjacent position of support column described in two groups (10) is provided with filtering sieve plate (11), described
The both ends of filtering sieve plate (11) are all provided with pin shaft (17) close to the side of first support bar (2), support column described in two groups (10)
Side close to second support bar (3) is all fixed with limit plate (13), and the both ends of filtering sieve plate (11) are close to the second support
The side of bar (3) is all provided with the second sliding block (15), and the top and bottom of limit plate described in two groups (13) are all provided with the second bullet
Spring (20) is provided with filter screen (18) at the top of the filtering sieve plate (11).
2. a kind of vibrating screen according to claim 1, it is characterised in that: the damping (12) includes sliding slot
(1201), and the number of sliding slot (1201) is four groups, and the sliding slot (1201) is all located at first support bar (2) and second support bar
(3) adjacent side, the internal bottom end of the sliding slot (1201) are all provided with telescopic sleeving rod (1202), the telescopic sleeving rod
(1202) outside is all evenly arranged with the first spring of multiple groups (1204).
3. a kind of vibrating screen according to claim 1, it is characterised in that: limit plate described in two groups (13) is close to filtering sieve plate
(11) side is all provided with the slideway to match with the second sliding block (15), and the filtering sieve plate (11) is sliding by slideway and second
The mutual cooperation of block (15) is slidably connected with limit plate (13).
4. a kind of vibrating screen according to claim 3, it is characterised in that: the inside of the slideway is all provided with limit hole
(14), the limit hole (14) is all provided with threaded hole (16) far from the side of filtering sieve plate (11).
5. a kind of vibrating screen according to claim 4, it is characterised in that: the limit plate (13) is far from filtering sieve plate (11)
Side be provided with the screw rod (19) to match with threaded hole (16), the filtering sieve plate (11) passes through threaded hole (16) and screw rod
(19) mutual cooperation is detachably connected with limit plate (13).
6. a kind of vibrating screen according to claim 1, it is characterised in that: the filtering sieve plate (11) by pin shaft (17) with
Support column (10) rotation connection, and filtering sieve plate (11) with the rotation angle that pin shaft (17) is basic point is 0 ° -45 °.
7. a kind of vibrating screen according to claim 1, it is characterised in that: the bottom of push rod described in two groups (7) all passes through solid
Determine block to be fixedly connected with support column (10).
8. a kind of vibrating screen according to claim 2, it is characterised in that: the two sides of support column described in two groups (10) are all arranged
There is the first sliding block (1203) to match with sliding slot (1201), and support column described in two groups (10) all passes through the first sliding block (1203)
Mutual cooperation with sliding slot (1201) is slidably connected with first support bar (2) and second support bar (3).
9. a kind of vibrating screen according to claim 1, it is characterised in that: the arc-shaped structure of the feed pipe (9), and feed
Manage the top that (9) are located at filtering sieve plate (11) side, the arc-shaped structure of the limit plate (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910268262.9A CN110075597B (en) | 2019-04-04 | 2019-04-04 | Vibrating screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910268262.9A CN110075597B (en) | 2019-04-04 | 2019-04-04 | Vibrating screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110075597A true CN110075597A (en) | 2019-08-02 |
| CN110075597B CN110075597B (en) | 2020-08-28 |
Family
ID=67414222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910268262.9A Expired - Fee Related CN110075597B (en) | 2019-04-04 | 2019-04-04 | Vibrating screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110075597B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112516658A (en) * | 2020-11-12 | 2021-03-19 | 姬世伟 | Feather recovery system in livestock breeding sewage |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394461A (en) * | 2013-08-16 | 2013-11-20 | 安徽理工大学 | Series-parallel vibrating screen with five degrees of freedom |
| CN204638536U (en) * | 2015-04-28 | 2015-09-16 | 四川宝石机械专用车有限公司 | A kind of sieve box of vibrating inclination-angle regulating device |
| CN205330584U (en) * | 2015-12-30 | 2016-06-22 | 天津锐力克工程机械有限公司 | Shale shaker unilateral angle -adjustment means |
| CN207154135U (en) * | 2017-09-09 | 2018-03-30 | 深圳市晋荣混凝土有限公司 | A kind of vibratory sieve |
-
2019
- 2019-04-04 CN CN201910268262.9A patent/CN110075597B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394461A (en) * | 2013-08-16 | 2013-11-20 | 安徽理工大学 | Series-parallel vibrating screen with five degrees of freedom |
| CN204638536U (en) * | 2015-04-28 | 2015-09-16 | 四川宝石机械专用车有限公司 | A kind of sieve box of vibrating inclination-angle regulating device |
| CN205330584U (en) * | 2015-12-30 | 2016-06-22 | 天津锐力克工程机械有限公司 | Shale shaker unilateral angle -adjustment means |
| CN207154135U (en) * | 2017-09-09 | 2018-03-30 | 深圳市晋荣混凝土有限公司 | A kind of vibratory sieve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112516658A (en) * | 2020-11-12 | 2021-03-19 | 姬世伟 | Feather recovery system in livestock breeding sewage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110075597B (en) | 2020-08-28 |
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Effective date of registration: 20200930 Address after: 257500 North of Meichen South Road, Kenli Development Zone, Dongying City, Shandong Province Patentee after: Shandong Ruilier Petroleum Equipment Co.,Ltd. Address before: Room 401, No. 3 Gate, No. 8-12, Chuangxingzhuang, Honggang District, Daqing City, Heilongjiang Province, 163000 Patentee before: Sun Shaowu |
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