CN107761672B - Air bag for air shield dam and processing technology thereof - Google Patents
Air bag for air shield dam and processing technology thereof Download PDFInfo
- Publication number
- CN107761672B CN107761672B CN201711136334.1A CN201711136334A CN107761672B CN 107761672 B CN107761672 B CN 107761672B CN 201711136334 A CN201711136334 A CN 201711136334A CN 107761672 B CN107761672 B CN 107761672B
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- China
- Prior art keywords
- air bag
- air
- anchoring part
- anchoring
- bag body
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- 238000005516 engineering process Methods 0.000 title claims abstract description 9
- 238000004873 anchoring Methods 0.000 claims abstract description 90
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 36
- 238000004073 vulcanization Methods 0.000 claims description 19
- 210000001503 joint Anatomy 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 238000011900 installation process Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 48
- 230000002035 prolonged effect Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
- B29D22/02—Inflatable articles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
Abstract
An air bag for an air shield dam and a processing technology thereof. Relates to the field of water retaining equipment, in particular to an air bag of an air shield dam and a processing technology thereof. The air shield dam air bag has the advantages that the integral structure of the air bag is not damaged in the installation process, and the service life of the air bag is long. The air shield dam air bag comprises an air bag body, wherein at least two layers of plies are arranged in the air bag body, a strip-shaped anchoring part is arranged on one side of the air bag body, the anchoring part and the air bag are vulcanized into a whole, and a plurality of anchoring holes are uniformly distributed on the anchoring part. The invention has the advantages of high integral strength, difficult damage and long service life. The local reinforcing layer arranged in the height direction of the anchoring part can be made of warp and weft like canvas, and has good affinity with rubber.
Description
Technical Field
The invention relates to the field of water retaining equipment, in particular to an air bag of an air shield dam and a processing technology thereof.
Background
The rubber dam and the air shield dam are commonly used in the field of movable water retaining dams at present.
The rubber dam bag and the air bag of the air shield dam are made of high-strength synthetic fiber fabrics as stress frameworks, and rubber is coated inside and outside as a protection layer, so that the air bag is manufactured. And anchoring the rubberized fabric or the bag body on the bottom plate to form a closed shape, and inflating the rubberized fabric or the bag body to a certain height by using water (gas) through an inflation and drainage pipeline for water retaining. The current air bag anchoring method is as follows: after the side edges of the composite fiber fabric are integrally formed through vulcanization and compression joint, the air bag is fixed on the bottom plate of the air shield dam through bolts at the compression joint. When the air shield dam is used, the pressure joint of the air bag is required to bear the pressure of air in the air bag and the pressure of fluid from water flow, so that the air bag is easy to crack at the pressure joint and the integral structure of the air bag is damaged by directly punching bolt holes at the pressure joint when the air shield dam is used for a long time, and the integral strength of the air bag is influenced.
The patent application (publication No. CN 105178247A, name: a dam bag for retaining dam, air bag and production method thereof) disclosed by the national intellectual property agency 2015.12.23 discloses that the dam comprises a dam bag body, wherein a plurality of framework layers are arranged in the dam bag body, each framework layer is composed of a plurality of curtain wires which are spaced and obliquely arranged, the curtain wires of adjacent framework layers are obliquely symmetrical, the dam bag body and the framework layers are combined into a whole through a vulcanization process, side adhesives are arranged on two sides of the dam bag body, a reinforcing layer for combining the dam bag body and the side adhesives into a whole is arranged between the dam bag body and the side adhesives, a rubberizing surface is arranged above the framework layer, a base adhesive surface is arranged below the framework layer, and holes penetrating the bag body are formed in the dam bag body. The dam bag and the air bag for the retaining dam are provided with the holes, so that holes are not needed to be punched in use, an internal framework layer is not damaged, the strength of a bag body or a bag body is increased, the strength of the bag body or the bag body at an anchoring position is improved, the safety coefficient of a retaining dam system in use is provided, the potential safety hazard is reduced, and meanwhile, the manufacturing method is simple and is suitable for mass production. But the air bag body is still perforated, and the vulcanized part is still affected when the air bag is used, so that the vulcanized part is easy to crack, and the service life is affected.
Disclosure of Invention
Aiming at the problems, the invention provides the air shield dam air bag which does not damage the integral structure of the air bag in the installation process and has long service life and the processing technology thereof.
The technical scheme of the invention is as follows: the utility model provides a gas shield dam gasbag, includes the gasbag body, be equipped with two layer at least ply in the gasbag body a side of gasbag body is equipped with strip anchor position, anchor position with the gasbag vulcanizes as an organic wholely the equipartition is in a plurality of anchor holes on the anchor position.
And surface reinforcing layers are respectively arranged on the anchoring part and the top surface and the bottom surface of the air bag body.
At least one local reinforcing layer is arranged on the anchoring part in the height direction.
The air bag is characterized in that a connecting block is arranged between the anchoring part and the air bag body, one side of the connecting block is attached to the air bag body, and the other side of the connecting block is attached to the anchoring part.
One side of the anchoring part is attached to the air bag body.
The processing method comprises the following steps:
1) Forming an inner bag of the air bag body to obtain an inner bag blank;
2) Wrapping at least two layers of plies on the inner bag blank, and forming an air bag blank;
3) Attaching surface reinforcing layers to the top surface and the bottom surface of the air bag blank respectively, and reserving connecting edges of anchoring parts;
4) Turning out the end of the surface reinforcing layer on the top surface, and attaching the local reinforcing layers piece by piece until reaching the height to form an anchoring part, wherein the butt joint edge of the anchoring part is fully attached with the butt joint edge of the inner bag;
5) The end of the surface reinforcing layer on the top surface is turned back, and the whole vulcanization is carried out, so that the top surface reinforcing layer, the inner bag, the anchoring part and the connecting block are vulcanized simultaneously, and the full vulcanization is ensured;
6) And (5) preparing an air bag of the air shield dam.
And 5) inflating the airbag body during integral vulcanization in the step 5).
The adjacent plies of the ply in said step 2) are 90 ° orthogonal.
And 4) vulcanizing and prefabricating the anchoring part into a whole by the local reinforcing layers which are attached piece by piece in the step 4).
According to the invention, the air bag is fixed on the foundation slab of the air shield dam through the anchoring holes on the anchoring part, the hole is not required to be formed on the working surface of the air bag body, the integral structure of the air bag is not influenced, the air bag body only needs to bear the pressure generated by the height of water flow during use, the pressure of a product for sealing the air bag is not required to be additionally born, the anchoring pressing plate does not bear the expansion force caused by sealing, and meanwhile, the integral bearing pressure of the air bag body is reduced, so that the air bag body is not easy to damage during use, the service life is long, and the integral structure of the air bag body is not damaged due to the fact that the hole is not required to be directly formed on the air bag body, so that the integral strength of the air bag is high, the air bag is not easy to damage, and the service life is long.
The surface reinforcing layer strengthens the connection strength of the balloon body and the anchoring part, so that the connection strength of the anchoring part and the balloon body is higher, the compressive strength is higher, the pressure born by the connection part is higher, the connection can be firmly connected under the water pressure, and the service life of the balloon is prolonged. And because the surface reinforcing layer is arranged, water flow does not directly generate pressure on the connecting part, but generates pressure on the surface reinforcing layer, so that the pressure bearing area is larger, the bearing pressure in the unit area is reduced, the integral compressive strength is increased, the connection can be firmly connected under the water pressure, and the service life of the air bag is prolonged.
At least one local reinforcing layer is arranged on the anchoring part in the height direction, the whole strength of the anchoring part is improved by the anchoring part formed by overlapping a plurality of local reinforcing layers, the permanent deformation of rubber when the rubber is compressed by an anchoring part is overcome, the body strength of the anchoring part is enhanced, and the horizontal shearing force is strong. Therefore, the rigidity of the anchoring part is higher, the phenomenon that the anchoring part is deformed to cause the untight anchoring when the bolt is used for anchoring is avoided, the air bag and the foundation slab are connected more firmly when the air bag is installed, and the service life is prolonged. The local reinforcing layer can be made of warp and weft like canvas, and has good affinity with rubber.
Drawings
Figure 1 is a schematic view of the structure of the present invention,
FIG. 2 is a schematic view of the anchoring portion structure according to the present invention;
figure 3 is a schematic view of the anchoring portion structure of the second embodiment of the present invention,
figure 4 is an enlarged schematic view of the structure of figure 1 at a,
FIG. 5 is a schematic diagram of step 1) in the present invention,
FIG. 6 is a schematic diagram of step 2) in the present invention,
FIG. 7 is a schematic diagram of step 3) in the present invention,
FIG. 8 is a schematic diagram of step 4) in the present invention,
FIG. 9 is a schematic diagram of step 5) of the present invention;
in the figure, 1 is an air bag body, 11 is an inner bag, 12 is a ply, 13 is a surface reinforcing layer, 2 is an anchoring part, 21 is a local reinforcing layer, 22 is a connecting block, 3 is an air inlet/outlet, and 4 is an anchoring hole.
Detailed Description
The invention discloses an air shield dam air bag as shown in fig. 1, which comprises an air bag body 1, wherein an air inlet/outlet 3 is arranged on the air bag body, at least two layers of ply layers 12 (formed by 45-degree oblique crossing or 90-degree orthogonal forming) are arranged in the air bag body 1, a strip-shaped anchoring part is arranged on one side of the air bag body, the anchoring part and the air bag body 1 are vulcanized into a whole, and a plurality of anchoring holes 4 are uniformly distributed on the anchoring part 2. The anchoring holes can be reserved during vulcanization, and the anchoring positions 2 can be perforated according to the field working conditions to form the anchoring holes 4. The anchor hole 4 on the anchor position is passed through the bolt during the installation makes the air shield dam gasbag fix on the foundation slab of air shield dam, do not need to open pores on the working face of gasbag body, do not influence the overall structure of gasbag body, the gasbag body only need bear the produced pressure of rivers height when using, do not need additionally bear the produced pressure of the air of sealing in the gasbag body, the clamp plate that is used with bolt cooperation anchor is not being born the inflation power that sealed results in, the whole bearing pressure of gasbag body diminishes simultaneously, make the gasbag body be difficult for the damage when using, long service life, owing to do not need directly to open pores on the gasbag body, do not destroy the overall structure of gasbag body, make the whole intensity of air shield dam gasbag high, not fragile, long service life.
The anchoring portion 2 and the top surface and the bottom surface of the airbag body 1 are respectively provided with a surface reinforcing layer 13 (warp-weft like canvas, which is a material with the same compressive strength and tensile strength in all directions, namely leather cloth commonly known in industry). The surface reinforcing layer strengthens the connection strength of the air bag body 1 and the anchoring part 2, so that the connection strength of the anchoring part 2 and the air bag body 1 is higher, the compression strength is higher, the pressure that the connecting part can bear is higher, the firm connection of the connecting part under water pressure is ensured, and the service life of the air bag body 1 is prolonged. And owing to be provided with surface reinforcement layer 13, rivers are not directly to connecting position pressure, and are to surface reinforcement layer 13 pressure generation for bearing area is bigger, and pressure dispersion bears the pressure in the unit area and diminishes, thereby makes the holistic compressive strength of air bag body 1 rise, ensures that connecting position can firm in connection under water pressure, thereby improves the life of air bag body 1 and promotes the holistic life of air shield dam gasbag.
At least one local reinforcing layer 21 is provided in the height direction of the anchoring portion. The anchoring part 2 formed by overlapping the plurality of local reinforcing layers improves the integral strength of the anchoring part, overcomes the permanent deformation of rubber when the rubber is compressed by an anchoring part, strengthens the body strength of the anchoring part, and has strong horizontal shearing force. Therefore, the rigidity of the anchoring part 2 is higher, the phenomenon that the anchoring is not tight due to partial deformation of the upper part of the anchoring part 2 when the bolt is used for anchoring is avoided, the air bag and the foundation slab are connected more firmly when the air bag is installed, and the service life is prolonged when the safety is improved. The local reinforcing layer can be made of warp and weft like canvas, has good affinity with rubber, is easy to be connected by vulcanization and is firm in connection.
A connecting block 22 is arranged between the anchoring part 2 and the air bag body 1, one side of the connecting block 22 is attached to the air bag body 1, and the other side of the connecting block is attached to the anchoring part 2. Because the edge of the air bag body 1 is irregular, the bonding between the anchoring part 2 and the air bag body 1 is not tight in the vulcanization process, and the overall strength is reduced, so that a connecting block 22 is arranged between the anchoring part 2 and the air bag body 1 and is used for filling up the gap between the anchoring part and the air bag body and the anchoring part, so that the air bag body and the anchoring part are firmly connected, and the strength is high.
One side of the anchoring part 2 is attached to the airbag body 1. In order to reduce the vulcanizing part, reduce the overall vulcanizing time and accelerate the production efficiency of the air bag, one side of the anchoring part 2 can be manufactured according to the shape of the outer edge of the air bag body 1 when the anchoring part 2 is manufactured, and the anchoring part 2 and the air bag body 1 are directly vulcanized when vulcanization is carried out, so that the overall vulcanizing time is reduced, the production efficiency of the air bag is accelerated, a connecting block is eliminated, the use of materials is reduced, and the production cost is reduced.
The processing technology of the air bag of the air shield dam comprises the following steps:
1) Forming an inner bag 11 of the air bag body 1 to obtain an inner bag blank; the inner bag blank is made of pure rubber, so that the inner bag blank has high elasticity and is not easy to break.
2) Wrapping at least two plies 12 over the shaped inner bladder blank; the inner bag is wrapped with at least two layers of plies 12, so that the rigidity of the inner bag 11 is enhanced, cracks caused by inflation of the inner bag 11 in use are avoided, the inner bag can bear higher air pressure, when in processing, the plies attached to the inner bag blank can be orthogonal to the inner bag blank or can be obliquely crossed with the inner bag blank according to different field working conditions, and the adjacent two layers of plies must be 90 degrees orthogonal, so that the inner bag uniformly distributes pressure on the whole plies when bearing internal air pressure, and the partial rupture of the inner bag 11 caused by uneven bearing pressure on the surface of the inner bag is avoided.
3) A surface reinforcing layer 13 attached to the top and bottom surfaces, and connecting edges of the anchoring parts are reserved; the surface enhancement layer (longitude and latitude like canvas) strengthens the strength of the surface of the inner bag, meanwhile, the ply 12 is protected, the ply 12 is prevented from being directly impacted by water flow, the structure of the ply 12 is damaged, the surface enhancement layer 13 can be vulcanized outside the ply by adopting the whole longitude and latitude like canvas, the water flow resistance is small due to the smooth surface of the longitude and latitude like canvas, the water flow resistance is reduced when the air shield dam air bag is used, the pressure of water flow to the air bag body 1 is reduced, the bearing pressure of the air bag body 1 is reduced, and the service life of the air bag body 1 is prolonged.
4) Turning out the end of the surface reinforcing layer on the top surface, and attaching the local reinforcing layer 21 piece by piece until reaching the height to form an anchoring part 2, wherein the butt joint edge of the anchoring part 2 is fully attached to the butt joint edge of the inner bag (without leaving a gap); the butt joint edges of the anchoring parts are arranged according to the shape of the outer edge of the air bag, the butt joint edges of the anchoring parts are fully attached to the butt joint edges of the inner bag, no gap is reserved, and the connection strength is improved. Or the connecting block 22 is arranged between the anchoring part and the inner bag, the gap between the anchoring part and the inner bag is made up by the connecting block, the butt joint edge of the anchoring part is fully attached to the butt joint edge of the inner bag, no gap is reserved, and the connection strength is improved.
5) The end of the surface reinforcing layer 13 on the top surface is turned back, and the whole vulcanization is carried out, so that the top surface reinforcing layer, the inner bag, the anchoring part and the connecting block are vulcanized simultaneously, and the full vulcanization is ensured.
6) And (5) preparing an air bag of the air shield dam.
The airbag body 1 is inflated during the integral vulcanization in the step 5). Namely, inflation vulcanization ensures that the air bag can not be wrinkled during vulcanization, ensures more uniform vulcanization and prolongs the service life of the air bag.
The adjacent plies of the ply in said step 2) are 90 ° orthogonal. The inner bag is wrapped with at least two layers of plies 12, so that the rigidity of the inner bag 11 is enhanced, cracks caused by inflation of the inner bag 11 in use are avoided, the inner bag can bear higher air pressure, when in processing, the plies attached to the inner bag blank can be orthogonal to the inner bag blank or can be obliquely crossed with the inner bag blank according to different field working conditions, and the adjacent two layers of plies must be 90 degrees orthogonal, so that the inner bag uniformly distributes pressure on the whole plies when bearing internal air pressure, and the partial rupture of the inner bag 11 caused by uneven bearing pressure on the surface of the inner bag is avoided.
The arrangement mode of the inner bag and the ply is selected according to the actual use condition, and the application range is wide. Adjacent plies are 90 degrees orthogonal, so that the compression resistance of the inner bag is more uniform, cracks in the inflation process of the inner bag when a single-layer ply is adopted are avoided, the compression resistance of the inner bag is high, and the service life of the inner bag is long.
The anchoring part in the step 4) is vulcanized and prefabricated into a whole by the local reinforcing layers 21 which are attached piece by piece. The anchoring part can be prefabricated, and the proper anchoring part is directly selected for vulcanization connection according to the specification of the air bag when the air bag is required to be used, so that the integral processing time of the air bag is shortened, and the processing efficiency is improved.
Claims (6)
1. The processing technology of the air bag of the air shield dam comprises an air bag body, wherein at least two layers of plies are arranged in the air bag body,
a strip-shaped anchoring part is arranged on one side of the air bag body, the anchoring part and the air bag are vulcanized into a whole, and a plurality of anchoring holes are uniformly distributed on the anchoring part;
a connecting block is arranged between the anchoring part and the air bag body, one side of the connecting block is attached to the air bag body, and the other side of the connecting block is attached to the anchoring part;
the processing technology comprises the following steps:
1) Forming an inner bag of the air bag body to obtain an inner bag blank;
2) Wrapping at least two layers of plies on the inner bag blank, and forming an air bag blank;
3) Attaching surface reinforcing layers to the top surface and the bottom surface of the air bag blank respectively, and reserving connecting edges of anchoring parts;
4) Turning out the end of the surface reinforcing layer on the top surface, and attaching the local reinforcing layers piece by piece until reaching the height to form an anchoring part, wherein the butt joint edge of the anchoring part is fully attached with the butt joint edge of the inner bag;
5) The end of the surface reinforcing layer on the top surface is turned back, and the whole vulcanization is carried out, so that the top surface reinforcing layer, the inner bag, the anchoring part and the connecting block are vulcanized simultaneously, and the full vulcanization is ensured;
6) And (5) preparing an air bag of the air shield dam.
2. The process for manufacturing an air shield dam airbag according to claim 1, wherein surface reinforcing layers are provided on the anchoring portion and the top and bottom surfaces of the airbag body, respectively.
3. The process for manufacturing an air bag for an air shield dam according to claim 1, wherein at least one local reinforcing layer is provided in a height direction of the anchor portion.
4. The process for manufacturing an air bag for an air shield dam according to claim 1, wherein the air bag body is inflated during the integral vulcanization in the step 5).
5. A process according to claim 1, wherein the adjacent plies of the plies in step 2) are 90 ° orthogonal.
6. The process for manufacturing an air bag for an air shield dam according to claim 1, wherein the anchoring portion in the step 4) is integrally formed by vulcanizing a locally reinforced layer laminated one by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711136334.1A CN107761672B (en) | 2017-11-16 | 2017-11-16 | Air bag for air shield dam and processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711136334.1A CN107761672B (en) | 2017-11-16 | 2017-11-16 | Air bag for air shield dam and processing technology thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107761672A CN107761672A (en) | 2018-03-06 |
| CN107761672B true CN107761672B (en) | 2023-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711136334.1A Active CN107761672B (en) | 2017-11-16 | 2017-11-16 | Air bag for air shield dam and processing technology thereof |
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| CN (1) | CN107761672B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708387A (en) * | 2018-08-06 | 2018-10-26 | 烟台桑尼橡胶有限公司 | A kind of fixed scuta is flexible coupling band with basis |
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|---|---|---|---|---|
| JP2004060361A (en) * | 2002-07-31 | 2004-02-26 | Akio Iida | Derricking gate |
| KR100767032B1 (en) * | 2007-03-27 | 2007-10-17 | (주)대도엔텍 | Fixing structure of protective cover for rubber dam |
| CN102628260A (en) * | 2012-04-16 | 2012-08-08 | 烟台桑尼橡胶有限公司 | Air bag for retaining dam and method for machining air bag by vulcanization of plate vulcanizing machine |
| CN202519632U (en) * | 2012-04-23 | 2012-11-07 | 河南润安建设集团有限公司 | Anchoring device for dam bag of rubber dam |
| CN103590374A (en) * | 2013-12-02 | 2014-02-19 | 烟台桑尼橡胶有限公司 | Hydraulic supporting dam |
| CN104343104A (en) * | 2014-11-07 | 2015-02-11 | 铁岭尔凡橡塑研发有限公司 | High-pressure lap-joint-free double-airbag rubber dam and production process thereof |
| CN104846790A (en) * | 2015-06-04 | 2015-08-19 | 烟台桑尼橡胶有限公司 | Cord fabric rubber dam bag and processing technique thereof |
| CN207419390U (en) * | 2017-11-16 | 2018-05-29 | 江苏扬州合力橡胶制品有限公司 | Gas shield dam air bag |
-
2017
- 2017-11-16 CN CN201711136334.1A patent/CN107761672B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004060361A (en) * | 2002-07-31 | 2004-02-26 | Akio Iida | Derricking gate |
| KR100767032B1 (en) * | 2007-03-27 | 2007-10-17 | (주)대도엔텍 | Fixing structure of protective cover for rubber dam |
| CN102628260A (en) * | 2012-04-16 | 2012-08-08 | 烟台桑尼橡胶有限公司 | Air bag for retaining dam and method for machining air bag by vulcanization of plate vulcanizing machine |
| CN202519632U (en) * | 2012-04-23 | 2012-11-07 | 河南润安建设集团有限公司 | Anchoring device for dam bag of rubber dam |
| CN103590374A (en) * | 2013-12-02 | 2014-02-19 | 烟台桑尼橡胶有限公司 | Hydraulic supporting dam |
| CN104343104A (en) * | 2014-11-07 | 2015-02-11 | 铁岭尔凡橡塑研发有限公司 | High-pressure lap-joint-free double-airbag rubber dam and production process thereof |
| CN104846790A (en) * | 2015-06-04 | 2015-08-19 | 烟台桑尼橡胶有限公司 | Cord fabric rubber dam bag and processing technique thereof |
| CN207419390U (en) * | 2017-11-16 | 2018-05-29 | 江苏扬州合力橡胶制品有限公司 | Gas shield dam air bag |
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| Publication number | Publication date |
|---|---|
| CN107761672A (en) | 2018-03-06 |
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