CN206888031U - The annular load box of self-balancing approach - Google Patents
The annular load box of self-balancing approach Download PDFInfo
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- CN206888031U CN206888031U CN201720628933.4U CN201720628933U CN206888031U CN 206888031 U CN206888031 U CN 206888031U CN 201720628933 U CN201720628933 U CN 201720628933U CN 206888031 U CN206888031 U CN 206888031U
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- annular
- plate
- ring
- shaped steel
- doughnut
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- 238000013459 approach Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 81
- 239000010959 steel Substances 0.000 claims abstract description 81
- 239000011440 grout Substances 0.000 claims abstract description 16
- 230000001681 protective effect Effects 0.000 claims description 8
- 238000007569 slipcasting Methods 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 3
- 240000002853 Nelumbo nucifera Species 0.000 claims 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 35
- 238000012360 testing method Methods 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model discloses a kind of self-balancing approach with annular load box, including upper doughnut-shaped steel plate, lower doughnut-shaped steel plate, outer ring baffle plate, annular baffle plate and pressure apparatus, pressure apparatus includes several annular oil cavity expansion cells, annular oil cavity expansion cell is overlapped and is interconnected up and down, it can be connected positioned at the annular oil cavity expansion cell of the top and the connection of upper doughnut-shaped steel plate and with hydraulic loading device, the annular oil cavity expansion cell positioned at bottom is connected with lower doughnut-shaped steel plate；Outer ring filled cavity is formed between upper doughnut-shaped steel plate, lower doughnut-shaped steel plate, outer ring baffle plate and pressure apparatus, annular filled cavity is formed between upper doughnut-shaped steel plate, lower doughnut-shaped steel plate, annular baffle plate and pressure apparatus；Load box is additionally provided with grouting valve block, and grouting valve block has grouting port, tube chamber, grout outlet one and the grout outlet two of mutual conduction, and grout outlet one and grout outlet two connect with outer ring filled cavity and annular filled cavity respectively.Effect is both to have saved cost, it is ensured that the stability of detection.
Description
Technical field
A kind of self-balancing approach be the utility model is related to annular load box.
Background technology
Self-balanced test method is that a kind of foundation bearing capacity at home and abroad developing rapidly and promoting the use of in recent years is new
Measuring technology, it can efficiently solve the insoluble test pile such as waterborne of conventional test methods, long and narrow place test pile, major diameter
The engineering challenges such as deep-drawn cast-in-place pile loading test, and with the advantages that time saving, economy, advanced technology and blue or green by engineering circles
Look at.Unlike accumulation load method and anchored pile-testing method, loading device is arranged on foundation bottom or middle and lower part by self-balancing approach, on the basis of making
Portion and bottom counter force system each other, can not so be limited, and increase substantially test tonnage by place.It is real inside conventional load case
The heart, it is impossible to open caisson self-balanced pile test is directly used in, and also due to open caisson enormous size, load box is usually prefabrication, for
For large scale load box, transport turns into another problem again.
In the prior art, Publication No. CN103147465A patent document discloses a kind of open caisson self-balancing approach that is used for and surveyed
The load box of examination, its technical scheme describe：Including load casing, hydraulic jack, the hydraulic oil being sequentially connected with hydraulic jack
Pipe and hydraulic loading device；The load casing includes upper doughnut-shaped steel plate, lower doughnut-shaped steel plate, outer ring baffle plate, annular baffle plate,
Wherein, upper doughnut-shaped steel plate and lower doughnut-shaped steel plate are oppositely arranged up and down, and annular baffle plate and outer ring baffle plate are respectively provided at annular
The inner side and periphery of steel plate and lower doughnut-shaped steel plate, and closed casing is formed with upper doughnut-shaped steel plate and lower doughnut-shaped steel plate, work as hydraulic pressure
When oil cylinder preloads, upper doughnut-shaped steel plate and lower doughnut-shaped steel plate can be moved up and down each；The hydraulic jack is located in load box body,
The bottom of hydraulic jack is connected on lower doughnut-shaped steel plate, and the piston of hydraulic jack contacts with upper doughnut-shaped steel plate；It is described to be used for open caisson
The load box of self-balancing approach test also includes being used for testing doughnut-shaped steel plate and the displacement transfer device of lower doughnut-shaped steel plate displacement.This
Utility model has reliability, practicality and economy.But in the technical scheme, appoint so there is defect：1st, oil cylinder has
Effect area is small, and load box operating pressure is higher in the case of same bearer power, and the pressure of contact surface is more than or close coagulation at that time
During native intensity, easily cause the concrete disintegrating of contact surface, produce false displacement；2nd, the technical scheme overall height is higher,
Detection completion grouting behind shaft or drift lining space is big, and slip casting effect is unstable.
Utility model content
In view of the shortcomings of the prior art, the utility model provides a kind of self-balancing approach with annular load box.
To achieve the above object, the utility model provides following technical scheme：
A kind of annular load box of self-balancing approach, including upper doughnut-shaped steel plate, lower doughnut-shaped steel plate, outer ring baffle plate, annular
Baffle plate and pressure apparatus, the pressure apparatus include several annular oil cavity expansion cells, several annular oil cavity expansion cells
Overlap and be interconnected up and down, connect positioned at the upper surface of annular oil cavity expansion cell of the top with the lower surface of upper doughnut-shaped steel plate
Connect, and can be connected with hydraulic loading device, positioned at the lower surface of the annular oil cavity expansion cell of bottom and lower doughnut-shaped steel plate
Upper surface connects；Outer ring filled cavity is formed between upper doughnut-shaped steel plate, lower doughnut-shaped steel plate, outer ring baffle plate and pressure apparatus, on
Annular filled cavity is formed between doughnut-shaped steel plate, lower doughnut-shaped steel plate, annular baffle plate and pressure apparatus；On the annular load box
Grouting valve block is additionally provided with, the grouting valve block has grouting port, tube chamber, grout outlet one and the grout outlet two of mutual conduction, described
Grout outlet one and grout outlet two connect with outer ring filled cavity and annular filled cavity respectively；Upper doughnut-shaped steel plate, lower doughnut-shaped steel plate,
Outer ring baffle plate, annular baffle plate, several annular oil cavity expansion cells are coaxially disposed.
Pass through above-mentioned technical proposal, pressure apparatus are directly formed by stacking by multiple annular oiling expansion cells, are eliminated existing
There are the step of needing to set multiple oil cylinders in technology and cost；Annular oiling expansion cell and upper doughnut-shaped steel plate and lower doughnut-shaped steel plate
Between contacted for ring surface, and to be coaxially disposed, on the one hand, so that annular oiling expansion cell and upper doughnut-shaped steel plate and lower annular
Contact area between steel plate is effectively increased, and improves the overall bearing capacity of load box, on the other hand so that upper doughnut-shaped steel plate
It is more uniform with the stress of lower doughnut-shaped steel plate, avoid that local pressure is higher, by the situation of the concrete disintegrating of contact surface, so as to
Avoid the generation of false displacement；After substituting hydraulic jack using annular oiling expansion cell, displacement height can be reduced, reduces note
Space is starched, to increase the stability of slip casting；, can inside ring packing chamber by grouting valve block after the completion of the test of annular load box
Slurry is passed through with outer ring packing cavity so that the slurry merges solidification with the slurry outside annular load box, so playing more
For stable effect.
Preferably, each described annular oil cavity expansion cell includes upper ring-type fixing plate, lower ring-type fixing plate, outer ring
And inner ring, the upper ring-type fixing plate and lower ring-type fixing plate offer looping pit, shape can occur for the outer ring and inner ring
Become and section is U-shaped, the upper ring-type fixing plate and lower ring-type fixing plate are oppositely arranged up and down, and the outer ring is connected to ring
The outside of shape fixed plate and lower ring-type fixing plate, the inner ring are connected to the inner side of ring-type fixing plate and lower ring-type fixing plate,
The upper ring-type fixing plate, lower ring-type fixing plate, outer ring and inner ring are coaxially disposed, and form oil-filled chamber between each other.
Preferably, the outer ring and inner ring include upper annular connecting plate, lower annular connecting plate and arc deformation plate, described
The both sides of arc deformation plate are connected to the side of annular connecting plate and lower annular connecting plate, the upper annular connecting plate
Lower surface is welded in the upper surface of ring-type fixing plate, and the upper surface of the lower annular connecting plate is welded in lower ring-type fixing plate
Upper surface.
Preferably, in addition to the annular filling oil cover plate with oil filler point, the annular filling oil cover plate are accepted neighbouring
Two annular oil cavity expansion cells.
Preferably, the section of the annular filling oil cover plate is stepped and is divided into upper ring plate and lower ring plate, the lower ring plate
Upper surface and be connected with the lower surface of lower ring-type fixing plate in the annular oil cavity expansion cell of its top linking, the lower ring plate
Lower surface and the annular oil cavity expansion cell with being connected below in the upper surface of upper ring-type fixing plate be connected, the upper ring plate
Into in the annular oil cavity expansion cell being connected with its top in the looping pit of lower ring-type fixing plate.
Pass through above-mentioned technical proposal, not only cost is low for the pressure apparatus that said structure is formed, and can also be to upper annular
Steel plate and lower doughnut-shaped steel plate play more stable support effect；Upper ring-type fixing plate in each annular oiling expansion cell,
The setting of lower ring-type fixing plate, annular filling oil cover plate, it is effectively guaranteed whole annular oiling expansion cell and by multiple annulars
The overall construction intensity of the pressure unit of oil injection expanding unit composition, makes it to occur axial expansion displacement, inner ring and outer
The arc deformation plate of circle ensure that each annular oiling expansion cell is respectively provided with the space of expansion.
Preferably, in addition to top offset pipe and bottom offset pipe, the top offset pipe are connected to the upper surface of doughnut-shaped steel plate,
The bottom offset pipe is connected on lower doughnut-shaped steel plate through upper doughnut-shaped steel plate.
Preferably, protective case and lower protective case are respectively equipped with the top offset pipe and bottom offset pipe.
Pass through above-mentioned technical proposal, can effectively it be detected by top offset pipe and bottom offset pipe, in the feelings of on-load pressure
Under condition, the displacement of upper ring-type fixing plate and lower ring-type fixing plate；The setting of upper protective case and lower protective case, can be to top offset pipe
The effect of being effectively protected is played with bottom offset pipe, prevents top offset pipe and bottom offset Guan Yuliang from expecting the situation of solidification.
Preferably, the upper surface of the upper doughnut-shaped steel plate is provided with suspension ring.
Pass through above-mentioned technical proposal, it can easily be sling by the suspension ring, be easily installed, transport.
Preferably, the grouting port is provided with Grouting Pipe, and plug is provided with the Grouting Pipe.
Pass through above-mentioned technical proposal, by the convenient connection with extraneous part of Grouting Pipe, plug can play sealing protection
Effect, prevents debris from entering in annular slip casting cover plate；When need not in use, Grouting Pipe can be blocked, when it is desired to be used
It can be drawn off, connect connecting tube.
Brief description of the drawings
Fig. 1 is the sectional view of the annular load box of the utility model self-balancing approach；
Fig. 2 is the top view of the annular load box of the utility model self-balancing approach；
Fig. 3 is the sectional view of bottom offset pipe in the utility model；
Fig. 4 is A portions enlarged drawing in Fig. 1.
Embodiment
The utility model self-balancing approach is further described with annular load box by Fig. 1 to Fig. 4.
A kind of annular load box of self-balancing approach, including upper doughnut-shaped steel plate 1, lower doughnut-shaped steel plate 2, outer ring baffle plate 4, inner ring
Shape baffle plate 5 and pressure apparatus 3.Upper doughnut-shaped steel plate 1 and lower doughnut-shaped steel plate are oppositely arranged about 2, and center position offers
Centre bore, so that Grouting Pipe 11 passes through.Outer ring baffle plate 4 is connected to the outward flange position of doughnut-shaped steel plate 1 and lower doughnut-shaped steel plate 2
Place, annular baffle plate 5 is connected to the inward flange opening position of doughnut-shaped steel plate 1 and lower doughnut-shaped steel plate 2, i.e., at central hole location, this
Place it should be noted that, be between the lower surface of the upper end of outer ring baffle plate 4, the upper end of annular baffle plate 5 and upper doughnut-shaped steel plate 1
Full welding, is spot welding between the upper surface of the lower end of outer ring baffle plate 4, the lower end of annular baffle plate 5 and lower doughnut-shaped steel plate 2, institute
When 3 pressurized expansion of pressure apparatus, to be disconnected at spot welding.The pressure apparatus 3 includes several annular oil cavity expansion cells,
There are four, several annular oil cavity expansion cells are overlapped and are interconnected up and down, the ring positioned at the top in the utility model
The upper surface of shape oil pocket expansion cell and the lower surface of upper doughnut-shaped steel plate 1 are welded, and can be connected with hydraulic loading device, positioned at most
The lower surface of the annular oil cavity expansion cell of lower section and the upper surface of lower doughnut-shaped steel plate 2 are welded；Upper doughnut-shaped steel plate 1, lower annular steel
Outer ring filled cavity 13, upper doughnut-shaped steel plate 1, lower doughnut-shaped steel plate 2, inner ring are formed between plate 2, outer ring baffle plate 4 and pressure apparatus 3
Annular filled cavity 14 is formed between shape baffle plate 5 and pressure apparatus 3；Grouting valve block 6 is also welded on the annular load box, it is described
Grouting valve block 6 has grouting port 64, tube chamber 61, grout outlet 1 and the grout outlet 2 62 of mutual conduction, the grout outlet 1
Connected respectively with outer ring filled cavity 13 and annular filled cavity 14 with grout outlet 2 62；Upper doughnut-shaped steel plate 1, lower doughnut-shaped steel plate 2,
Outer ring baffle plate 4, annular baffle plate 5, several annular oil cavity expansion cells are coaxially disposed.
Further, each described annular oil cavity expansion cell includes upper ring-type fixing plate 32, lower ring-type fixing plate
33rd, outer ring 35 and inner ring 31.Offer looping pit on the upper ring-type fixing plate 32 and lower ring-type fixing plate 33, looping pit with
Upper ring-type fixing plate 32 is coaxial.The outer ring 35 and inner ring 31 can deform upon and section is U-shaped, the U-shaped mouth of outer ring 35
Inwardly, outwardly, the upper ring-type fixing plate 32 and lower ring-type fixing plate are oppositely arranged the U-shaped mouth of inner ring 31 about 33, described outer
Circle 35 is connected to the outside of ring-type fixing plate 32 and lower ring-type fixing plate 33, and the inner ring 31 is connected to ring-type fixing plate 32
With the inner side of lower ring-type fixing plate 33, upper ring-type fixing plate 32, lower ring-type fixing plate 33, outer ring 35 and the inner ring 31 are coaxially set
Put, and form oil-filled chamber between each other.The outer ring 35 and inner ring 31 include upper annular connecting plate 311, lower annular connecting plate
312 and arc deformation plate 313, upper annular connecting plate 311, lower annular connecting plate 312 and arc deformation plate 313 be integrally formed, institute
The both sides for stating arc deformation plate 313 are connected to the side of annular connecting plate 311 and lower annular connecting plate 312, it is described on
The lower surface of annular connecting plate 311 is welded in the upper surface of ring-type fixing plate 32, the upper surface of the lower annular connecting plate 312
It is welded in the lower surface of lower ring-type fixing plate 33；Also include the annular filling oil cover plate 34 with oil filler point 341, the annular oiling
Cover plate 34, which is accepted, connects two neighbouring annular oil cavity expansion cells.The section of the annular filling oil cover plate 34 is stepped
And it is divided into upper ring plate 342 and lower ring plate 343, the upper surface of the lower ring plate 343 and the annular oil cavity expansion being connected with its top
The lower surface welding of lower ring-type fixing plate 33 in unit, the lower surface of the lower ring plate 343 and the annular oil with being connected below
The upper surface welding of upper ring-type fixing plate 32 in chamber expansion cell, the upper ring plate 342 enter the annular oil being connected with its top
In chamber expansion cell in the looping pit of lower ring-type fixing plate 33, per adjacent one group on annular connecting plate 311 and lower annular connection
Plate 312 is respectively positioned on per between adjacent upper ring-type fixing plate 32 and lower ring-type fixing plate 33, is tied with increasing the overall of pressure apparatus 3
Structure intensity, upper ring-type fixing plate 32 and lower ring-type fixing plate 33 are steel plate；When rushing oily into oil pocket, arc deformation plate can be made
313 slowly stretch, so as to realize the axial displacement of whole pressure apparatus 3.
Further, in addition to top offset pipe 8 and bottom offset pipe 9, the top offset pipe 8 are welded in doughnut-shaped steel plate 1
Upper surface, the bottom offset pipe 9 are welded on lower doughnut-shaped steel plate 2 through upper doughnut-shaped steel plate 1.The top offset pipe 8 and bottom offset
Protective case and lower protective case 10 are respectively equipped with pipe 9.
Further, the upper surface of the upper doughnut-shaped steel plate 1 is provided with suspension ring 7.
Further, the grouting port 64 is provided with Grouting Pipe 11, and plug 12 is provided with the Grouting Pipe 11.
Described above is only preferred embodiment of the present utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (9)
1. a kind of annular load box of self-balancing approach, including upper doughnut-shaped steel plate, lower doughnut-shaped steel plate, outer ring baffle plate, annular gear
Plate and pressure apparatus, it is characterized in that：The pressure apparatus includes several annular oil cavity expansion cells, and several annular oil cavities are swollen
Swollen unit is overlapped and is interconnected up and down, under the upper surface of the annular oil cavity expansion cell of the top and upper doughnut-shaped steel plate
Surface connects, and can be connected with hydraulic loading device, positioned at the lower surface of the annular oil cavity expansion cell of bottom and lower annular
The upper surface connection of steel plate；Outer ring filling is formed between upper doughnut-shaped steel plate, lower doughnut-shaped steel plate, outer ring baffle plate and pressure apparatus
Chamber, annular filled cavity is formed between upper doughnut-shaped steel plate, lower doughnut-shaped steel plate, annular baffle plate and pressure apparatus；The annular lotus
Carry and be additionally provided with grouting valve block on case, the grouting valve block has grouting port, tube chamber, grout outlet one and the grout outlet of mutual conduction
Two, the grout outlet one and grout outlet two connect with outer ring filled cavity and annular filled cavity respectively；Upper doughnut-shaped steel plate, lower ring
Shape steel plate, outer ring baffle plate, annular baffle plate, several annular oil cavity expansion cells are coaxially disposed.
2. the annular load box of self-balancing approach according to claim 1, it is characterized in that：Each described annular oil cavity expansion
Unit includes upper ring-type fixing plate, lower ring-type fixing plate, outer ring and inner ring, the upper ring-type fixing plate and lower ring-type fixing plate
Looping pit is offered, the outer ring and inner ring can deform upon and section is U-shaped, the upper ring-type fixing plate and lower ring
Shape fixed plate is oppositely arranged up and down, and the outer ring is connected to the outside of ring-type fixing plate and lower ring-type fixing plate, the inner ring
It is connected to the inner side of ring-type fixing plate and lower ring-type fixing plate, the upper ring-type fixing plate, lower ring-type fixing plate, outer ring and interior
Circle is coaxially disposed, and forms oil-filled chamber between each other.
3. the annular load box of self-balancing approach according to claim 2, it is characterized in that：The outer ring and inner ring include upper
Annular connecting plate, lower annular connecting plate and arc deformation plate, the both sides of the arc deformation plate are connected to annular connection
The side of plate and lower annular connecting plate, the lower surface of the upper annular connecting plate are welded in the upper surface of ring-type fixing plate, institute
The upper surface for stating lower annular connecting plate is welded in the upper surface of lower ring-type fixing plate.
4. the annular load box of self-balancing approach according to claim 3, it is characterized in that：Also include the annular with oil filler point
Oiling cover plate, the annular filling oil cover plate accept two neighbouring annular oil cavity expansion cells.
5. the annular load box of self-balancing approach according to claim 4, it is characterized in that：The section of the annular filling oil cover plate
Stepped and be divided into upper ring plate and lower ring plate, the upper surface of the lower ring plate and the annular oil cavity expansion that be connected with its top are singly
The lower surface connection of lower ring-type fixing plate in member, the lower surface of the lower ring plate and the expansion of the annular oil cavity with being connected below are single
The upper surface connection of upper ring-type fixing plate in member, under the upper ring plate enters in the annular oil cavity expansion cell being connected with its top
In the looping pit of ring-type fixing plate.
6. the annular load box of self-balancing approach according to claim 1, it is characterized in that：Also include top offset pipe and bottom offset
Pipe, the top offset pipe are connected to the upper surface of doughnut-shaped steel plate, and the bottom offset pipe is connected to lower ring through upper doughnut-shaped steel plate
On shape steel plate.
7. the annular load box of self-balancing approach according to claim 6, it is characterized in that：The top offset pipe and bottom offset pipe
On be respectively equipped with protective case and lower protective case.
8. the annular load box of self-balancing approach according to claim 1, it is characterized in that：The upper surface of the upper doughnut-shaped steel plate
It is provided with suspension ring.
9. the annular load box of self-balancing approach according to claim 1, it is characterized in that：The grouting port is provided with slip casting
Manage, plug is provided with the Grouting Pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720628933.4U CN206888031U (en) | 2017-06-01 | 2017-06-01 | The annular load box of self-balancing approach |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720628933.4U CN206888031U (en) | 2017-06-01 | 2017-06-01 | The annular load box of self-balancing approach |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206888031U true CN206888031U (en) | 2018-01-16 |
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ID=61320892
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720628933.4U Expired - Fee Related CN206888031U (en) | 2017-06-01 | 2017-06-01 | The annular load box of self-balancing approach |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206888031U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178101A (en) * | 2017-06-01 | 2017-09-19 | 浙江欧感机械制造有限公司 | Self-balancing approach annular load box |
-
2017
- 2017-06-01 CN CN201720628933.4U patent/CN206888031U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178101A (en) * | 2017-06-01 | 2017-09-19 | 浙江欧感机械制造有限公司 | Self-balancing approach annular load box |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180116 |