CN109357089A - A kind of rubber tube and preparation method thereof - Google Patents
A kind of rubber tube and preparation method thereof Download PDFInfo
- Publication number
- CN109357089A CN109357089A CN201811312292.7A CN201811312292A CN109357089A CN 109357089 A CN109357089 A CN 109357089A CN 201811312292 A CN201811312292 A CN 201811312292A CN 109357089 A CN109357089 A CN 109357089A
- Authority
- CN
- China
- Prior art keywords
- strengthening course
- ring flange
- rubber
- rubber tube
- glue layer
- 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.)
- Withdrawn
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 52
- 239000005060 rubber Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title abstract description 4
- 238000005728 strengthening Methods 0.000 claims abstract description 55
- 239000003292 glue Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000000452 restraining effect Effects 0.000 claims abstract description 3
- 238000004804 winding Methods 0.000 claims description 10
- 230000001680 brushing effect Effects 0.000 claims description 7
- 244000043261 Hevea brasiliensis Species 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 5
- 229920003052 natural elastomer Polymers 0.000 claims description 5
- 229920001194 natural rubber Polymers 0.000 claims description 5
- 238000004073 vulcanization Methods 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000005488 sandblasting Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000005062 Polybutadiene Substances 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920002857 polybutadiene Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000002955 isolation Methods 0.000 abstract description 13
- 230000006378 damage Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 206010016256 fatigue Diseases 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010057 rubber processing Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/10—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements not embedded in the wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
A kind of rubber tube and preparation method thereof, the rubber tube include flexible tube section and the ring flange that flexible tube section both ends are arranged in, and the tube wall of the flexible tube section is by successively including inner glue layer, strengthening course and outer glue-line except interior；The end solderless wrapped connection restraining position ring block of the strengthening course is simultaneously mounted in the tongue-and-groove of ring flange.The inner glue layer of rubber tube of the invention is contacted with pipeline medium, and end anti-package lives ring flange for sealing；Strengthening course plays pressure-bearing；Outer glue-line plays protective action；Ring flange is for connecting；Stop collar and ring flange fix strengthening course jointly, prevent deformation process strengthening course and rubber from relative displacement occurs, influence pressure-bearing.Rubber tube of the present invention is applied to pass through the flexible connection of the critical piping of Seismic Isolation of Isolation Layer, avoids destruction of the important equipment pipeline in seismic deformation, has deformability strong, maximum reaches ± 700mm, counter-force is low, the good feature of durability, and repeated deformation fatigability is excellent, long service life.
Description
Technical field
The present invention relates to architectural vibration-insulation technical field, pipeline pipeline architecture and its production side in especially a kind of Seismic Isolation of Isolation Layer
Method.
Background technique
Architectural vibration-insulation technology is a kind of emerging anti-seismic technology, can effectively improve building aseismicity ability.Architectural vibration-insulation technology
Harm of the earthquake to building mainly is reduced using shock isolating pedestal in Seismic Isolation of Isolation Layer, shock isolating pedestal has been used widely.But for
The processing for passing through the connecting portions such as pipeline, the pipeline of Seismic Isolation of Isolation Layer is generally poor, is not avoided that important equipment pipeline in earthquake
It destroys, can not ensure the duration of building function after shake.Existing pressure-bearing rubber pipe usually requires that indeformable or difficult deformation, is not inconsistent
It builds jointly and builds the large deformation of isolation rubber hose, the requirement of low counter-force.On August 1st, 2018 implement " JG/T 541-2017 building every
Shake flexible duct " it defines suitable for architectural vibration-insulation flexible joint, wherein rubber hose applies in general to air-conditioner pipe, rainwater
Pipe, drainpipe etc., the rubber hose product met the requirements of the standard at present belong to blank at home.
Summary of the invention
The object of the present invention is to provide a kind of rubber tube and preparation method thereof, to solve existing pipeline pipeline be not able to satisfy every
The technical issues of shake requires；And solve the problems, such as how to realize the large deformation of pipeline pipeline, low counter-force.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of rubber tube, including flexible tube section and the ring flange that flexible tube section both ends are arranged in, the tube wall of the flexible tube section is by except interior
It successively include inner glue layer, strengthening course and outer glue-line；The end solderless wrapped connection restraining position ring block of the strengthening course is simultaneously mounted in ring flange
In tongue-and-groove.
The end of the inner glue layer passes through ring flange and level is folded outward the outer end face for being coated on ring flange and length is more than method
Blue disk tongue-and-groove position.
The inner glue layer is one or more of natural rubber, butadiene-styrene rubber, butadiene rubber.
The strengthening course is wound in the inner glue layer with 54 ° 44 ' of winding angle.
The fold of end 180 degree, the fitting of the strengthening course are coated on the outside of stop collar 4, and covered section is fitted in method
In the tongue-and-groove of blue disk, turn down the inner face that end is more than ring flange.
The strengthening course is one or more of polyester, polyamide fibre, aramid fiber cord.
The stop collar is becket, and cross section is outwardly formed and reinforcement in rectangle and in the base angle position of medial surface
The arc outer end face of layer fitting transition.
The outer glue-line end is equipped with the notch of corresponding clamping strengthening course fold end, the fitting of its end is connected to strengthening course
Outside and the inner face for being bonded in ring flange.
The outer glue-line is one or more of EP rubbers or neoprene.
A kind of production method of rubber tube as mentioned, the specific steps are as follows:
Inner glue layer is wrapped on the tube core of brushing interleaving agent by step 1.
Step 2, strengthening course is wound in the inner glue layer according to 54 ° 44 ' of winding angle: strengthening course uses day before winding
Right rubber rubber processing.
Step 3, outer glue-line are wrapped on strengthening course.
Step 4 carries out end portion treatment to flexible tube section and is attached with ring flange: strengthening course is clamped after bypassing stop collar
In the tongue-and-groove of ring flange, inner glue layer anti-package of turning up is lived the position of ring flange, stop collar ring and ring flange and rubber contact and is passed through
Sandblasting ungrease treatment and brushing adhesive.
Step 5, vulcanizing treatment.
Step 6 takes out tube core after vulcanization.
Compared with prior art the invention has the characteristics that and the utility model has the advantages that
Rubber tube of the present invention is applied to pass through the flexible connection of the critical piping of Seismic Isolation of Isolation Layer, and important equipment pipeline is avoided to exist
Destruction in seismic deformation has deformability strong, and maximum reaches ± 700mm, and counter-force is low, the good feature of durability, and repeatedly
Deform that fatigability is excellent, long service life.
The inner glue layer of rubber tube of the invention is contacted with pipeline medium, and end anti-package lives ring flange for sealing；Strengthening course
Play pressure-bearing；Outer glue-line plays protective action；Ring flange is for connecting；Stop collar and ring flange fix strengthening course jointly, prevent
Relative displacement occurs for deformation process strengthening course and rubber, influences pressure-bearing.
Rubber tube of the present invention realizes the requirement of large deformation by the deformation of each structure sheaf, and specifically interior outer glue-line is mould
Low, elongation rubber material is measured, it is the balance angle of structure, this state exists that strengthening course, which uses 54 ° 44 ' of winding angle,
Structure is most stable when rubber tube is indeformable, and having between interior outer glue-line and strengthening course can become when good bonding effect stress jointly
Shape.
For conventional major diameter sebific duct in order to fix strengthening course, flange needs certain length, passes through binding in end of rubber tube
Wirerope is fixed on strengthening course on ring flange, and just can guarantee will not occur reinforcement delamination layer and lead to pressure-bearing when stress deformation
Insufficient problem.And rubber tube of the present invention realizes the purpose of low counter-force since each structure sheaf is easily deformable and light weight；Its
Middle light weight is since the structure is different from conventional sebific duct: ring flange length is small, reduces weight, while tying up without using steel wire
Prick strengthening course, it is only necessary to which becket and flange are blocked jointly to fix the common of interior outer glue-line and strengthening course when strengthening course guarantees stress
Deformation.
Disclosed by the invention is widely suitable to pass through the flexible connection of the air-conditioner pipe of Seismic Isolation of Isolation Layer, rain pipe, drainpipe.
Detailed description of the invention
The present invention will be further described in detail with reference to the accompanying drawing.
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the enlarged structure schematic diagram of A node in Fig. 1.
Appended drawing reference: 1- inner glue layer, 2- strengthening course, 3- outer glue-line, 4- stop collar, 5- ring flange.
Specific embodiment
Embodiment is shown in Figure 1, this rubber tube, including flexible tube section and the ring flange 5 that flexible tube section both ends are arranged in, institute
The tube wall of flexible tube section is stated by successively including inner glue layer 1, strengthening course 2 and outer glue-line 3 except interior；The end of the strengthening course 2 around
It is connected to stop collar 4 and is mounted in the tongue-and-groove of ring flange 5.Shown ring flange is moveable flange, and inner ring is in ladder
Shape forms tongue-and-groove, aperture and hole location according to flange national standard in step surface position, and material is Q235 steel.
Shown in Figure 2, the end of the inner glue layer 1 passes through ring flange and level is folded outward the outer end for being coated on ring flange
Face and length are more than ring flange tongue-and-groove position.
The outside 180 degree fold in the end of the strengthening course 2, fitting are coated on the outside of stop collar 4, covered section fitting
In the tongue-and-groove of ring flange, fold end be more than the inner face of ring flange and be fitted in ring flange inner ring and reinforcement layer main body it
Between.
The stop collar 4 is becket, and cross section is outwardly formed and reinforcement in rectangle and in the base angle position of medial surface
The arc outer end face of layer fitting transition.The stop collar is reinforced layer and encases, and guarantees that deformation process rubber layer and strengthening course are common
Uniformly, it deforms, material is Q235 steel.The stop collar correspondence for being coated with strengthening course is mounted in the tongue-and-groove of ring flange, outboard end
Face is concordant with ring flange outer end face and is coated on the inside of the horizontal outer trisection of inner glue layer.
The cross sectional dimensions and tongue-and-groove of stop collar are adapted, and the height after guaranteeing cladding is consistent with tongue-and-groove depth, width is big
In tongue-and-groove width, the close connection limit of strengthening course, stop collar and ring flange is realized.
The outer glue-line end is equipped with the notch of corresponding clamping strengthening course 2 fold end, the fitting of its end is connected to reinforcement
Layer outside and the inner face for being bonded in ring flange.
The inner glue layer 1 is the good rubber of adhesive property, such as one of natural rubber, butadiene-styrene rubber, butadiene rubber or
It is several.The strengthening course is wound in the inner glue layer with 54 ° 44 ' of winding angle.The strengthening course 2 is polyester, polyamide fibre, aramid fiber curtain
One or more of cloth, and select natural rubber rubber processing bonding with interior outer glue-line to enhance strengthening course.The outer glue
Layer choosing, which is used, prevents one or more of the good EP rubbers of old performance or neoprene.
Rubber tube finished product according to JG/T 541-2017 test result, ginseng as shown in the table below:
| Test item | Testing result |
| Room temperature air-tightness | Qualified (no continuous air bubbles, no hose bubbling phenomenon) |
| Low temperature airtightness | Qualified (maximum value 3.0KPa/min, minimum value 2.2KPa/min) |
| Verify pressure | Qualified (No leakage, without breach, without sharply metaboly) |
| Burst pressure | Qualified (No leakage, without breach, without sharply metaboly) |
| Interlaminar bonding property | Qualified (inner glue layer and strengthening course 5.76KN/m；Outer glue-line and strengthening course 5.31KN/m) |
| Maximum allowable displacement performance | Qualified (without exception deformation, ne-leakage) |
| Fatigue behaviour | Qualified (without exception deformation, ne-leakage) |
A kind of production method of rubber tube as mentioned, by taking internal diameter 150mm × 1.5m long rubber tube as an example, specific steps are such as
Under:
Inner glue layer is wrapped on the tube core of brushing interleaving agent by step 1.
Step 2, strengthening course is wound in the inner glue layer according to 54 ° 44 ' of winding angle: strengthening course uses day before winding
Right rubber rubber processing.
Step 3, outer glue-line are wrapped on strengthening course.
Step 4 carries out end portion treatment to flexible tube section and is attached with ring flange: strengthening course 2 blocks after bypassing stop collar 4
It connects in the tongue-and-groove of ring flange, inner glue layer anti-package of turning up is lived the position of ring flange, stop collar and ring flange and rubber contact and passed through
Sandblasting ungrease treatment and brushing adhesive.
Stop collar is to limit and chemically react limit by physics, and physics limit refers to that ring flange lowest point is limited lower than metal
The highest point of position ring plays physics limit, and chemistry limit refers to that sandblasting is all passed through at the position of stop collar and ring flange and rubber contact
Reaction of Salmon-Saxl altogether occurs in rubber tube sulfidation for ungrease treatment and brushing adhesive, realizes chemical reaction limit.
Step 5, vulcanizing treatment: twining water cloth, using 150 DEG C × 45min vulcanizing tank steam vulcanization (cure).
Step 6 takes out tube core after vulcanization, solve water cloth.
Claims (10)
1. a kind of rubber tube, including flexible tube section and the ring flange (5) that flexible tube section both ends are arranged in, it is characterised in that:
The tube wall of the flexible tube section is by successively including inner glue layer (1), strengthening course (2) and outer glue-line (3) except interior；
The end solderless wrapped connection restraining position ring block (4) of the strengthening course (2) is simultaneously mounted in the tongue-and-groove of ring flange (5).
2. rubber tube according to claim 1, it is characterised in that:
The end of the inner glue layer (1) passes through ring flange and level is folded outward the outer end face for being coated on ring flange and length is more than method
Blue disk tongue-and-groove position.
3. rubber tube according to claim 2, it is characterised in that:
The inner glue layer (1) is one or more of natural rubber, butadiene-styrene rubber, butadiene rubber.
4. rubber tube according to claim 3, it is characterised in that:
The strengthening course is wound in the inner glue layer with 54 ° 44 ' of winding angle.
5. rubber tube according to claim 4, it is characterised in that:
The fold of end 180 degree, the fitting of the strengthening course (2) are coated on the outside of stop collar (4), and covered section is fitted in method
In the tongue-and-groove of blue disk, turn down the inner face that end is more than ring flange.
6. rubber tube according to claim 4 or 5, it is characterised in that:
The strengthening course (2) is one or more of polyester, polyamide fibre, aramid fiber cord.
7. rubber tube according to claim 5, it is characterised in that:
The stop collar (4) is becket, and cross section is outwardly formed and strengthening course in rectangle and in the base angle position of medial surface
It is bonded the arc outer end face of transition.
8. rubber tube according to claim 5, it is characterised in that:
The outer glue-line end is equipped with the notch of corresponding clamping strengthening course (2) fold end, the fitting of its end is connected to strengthening course
Outside and the inner face for being bonded in ring flange.
9. rubber tube according to claim 8, it is characterised in that:
The outer glue-line is one or more of EP rubbers or neoprene.
10. a kind of production method of rubber tube as claimed in any one of claims 1 to 9, which is characterized in that specific steps are such as
Under:
Inner glue layer is wrapped on the tube core of brushing interleaving agent by step 1；
Step 2, strengthening course is wound in the inner glue layer according to 54 ° 44 ' of winding angle: strengthening course uses natural rubber before winding
The processing of rubber erasers glue；
Step 3, outer glue-line are wrapped on strengthening course；
Step 4, carry out end portion treatment to flexible tube section and be attached with ring flange: strengthening course (2) blocks afterwards around stop collar (4)
It connects in the tongue-and-groove of ring flange, inner glue layer anti-package of turning up is lived the position of ring flange, stop collar ring and ring flange and rubber contact and passed through
Cross sandblasting ungrease treatment and brushing adhesive；
Step 5, vulcanizing treatment: twining water cloth, using 150 DEG C × 45min vulcanizing tank steam vulcanization (cure)；
Step 6 takes out tube core after vulcanization, solve water cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811312292.7A CN109357089A (en) | 2018-11-06 | 2018-11-06 | A kind of rubber tube and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811312292.7A CN109357089A (en) | 2018-11-06 | 2018-11-06 | A kind of rubber tube and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109357089A true CN109357089A (en) | 2019-02-19 |
Family
ID=65344163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811312292.7A Withdrawn CN109357089A (en) | 2018-11-06 | 2018-11-06 | A kind of rubber tube and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109357089A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486554A (en) * | 2019-09-05 | 2019-11-22 | 浙江煜焰工业设计有限公司 | High-intensity sealing type oiling pipe assembly |
| CN110815668A (en) * | 2019-10-31 | 2020-02-21 | 安徽省国发石化设备有限责任公司 | Vulcanizing device and process for flange end |
| CN112873775A (en) * | 2020-12-28 | 2021-06-01 | 苏州华仁科技有限公司 | HRS silicone tube surface smooth surface forming process |
| CN115585314A (en) * | 2022-10-19 | 2023-01-10 | 河北泽邦塑胶科技有限公司 | Anti-settling rubber hose structure and preparation method thereof |
-
2018
- 2018-11-06 CN CN201811312292.7A patent/CN109357089A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486554A (en) * | 2019-09-05 | 2019-11-22 | 浙江煜焰工业设计有限公司 | High-intensity sealing type oiling pipe assembly |
| CN110815668A (en) * | 2019-10-31 | 2020-02-21 | 安徽省国发石化设备有限责任公司 | Vulcanizing device and process for flange end |
| CN112873775A (en) * | 2020-12-28 | 2021-06-01 | 苏州华仁科技有限公司 | HRS silicone tube surface smooth surface forming process |
| CN115585314A (en) * | 2022-10-19 | 2023-01-10 | 河北泽邦塑胶科技有限公司 | Anti-settling rubber hose structure and preparation method thereof |
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| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190219 |
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| WW01 | Invention patent application withdrawn after publication |