CN103697254A - Hydraulic rubber hose - Google Patents
Hydraulic rubber hose Download PDFInfo
- Publication number
- CN103697254A CN103697254A CN201310720379.9A CN201310720379A CN103697254A CN 103697254 A CN103697254 A CN 103697254A CN 201310720379 A CN201310720379 A CN 201310720379A CN 103697254 A CN103697254 A CN 103697254A
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- China
- Prior art keywords
- layer
- rubber
- enhancement layer
- mesoglea
- inner glue
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- 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.)
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Classifications
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- 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
- F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
Abstract
The invention discloses a hydraulic rubber hose. The hydraulic rubber hose is composed of an inner rubber layer (1), an inner rubber protecting layer (2), a reinforcing layer (3), a middle rubber layer (4) and an outer rubber layer (5). Therefore, the hydraulic rubber hose has the advantages of being stable in chemical properties and structure, oil-resistant, high-temperature-resistant, ageing-resistant, weather-resistant, high in bearing performance, tight in pipe combination, soft in usage, small in deformation, good in flexibility and fatigue durability, solid, practical, high in strength, wear-resistant, novel in structure, long in service life and the like and has a wide market prospect in popularization of the hydraulic rubber hose.
Description
Technical field
The present invention relates to hydraulic tube field, particularly relate to a kind of hydralic hose.
Background technique
Hydralic hose claims again hydraulic oil pipe, hydraulic hose, high-pressure rubber pipe etc., material mainly comprises two kinds of quality of rubber materials and rubber and plastic materials, be usually used in the transmission of the liquid such as modern petroleum base liquid, water fluid, existing hydralic hose bearing capacity is low, ageing-resistant performance is weak, softness is poor, affect routine use and working life, be unfavorable for large-scale promotion and use.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of hydralic hose, by bearing capacity, the use specific rubber that adopts multi-layer structure to increase body, as the material of body, improved the chemical property of body, novel structure, high temperature resistant, ageing-resistant, be conducive to large-scale promotion, on hydralic hose universal, have market prospects widely.
For solving the problems of the technologies described above, the invention provides a kind of hydralic hose, comprising:
(1) inner glue layer,
(2) interior compound protective layer,
(3) enhancement layer,
(4) mesoglea,
(5) outer glue-line,
It is characterized in that,
Described inner glue layer is hollow tube, for bearing the pressure of institute's transmission medium, material is a kind of of silicone rubber, fluorine rubber, Thiokol, chlorohydrin rubber, nitrile butadiene rubber, lactoprene, urethane rubber, butyl rubber, the inside diameter ranges of described inner glue layer is 4.6 ~ 52mm, wall thickness range is 0.8 ~ 1.6mm, and uneven thickness evenness is less than 0.5mm;
Described interior compound protective layer closely connects the outer surface of described inner glue layer, for the protection of inner glue layer, isolation inner glue layer and enhancement layer and protection enhancement layer, the quality proportioning of material comprises 5 parts of glass fiber cloths, 3 parts of potteries, 1 part of silicon nitride, 0.5 part of silicon carbide and 0.5 part of zirconium boride, wall thickness range is 0.2 ~ 0.8mm, and the maximum temperature that can bear is greater than 700 ℃;
Described enhancement layer closely connects the outer surface of described interior compound protective layer, and for the protection of the working pressure of described inner glue layer and described interior compound protective layer, described enhancement layer has some layers, material is braided steel wire framework material, wall thickness is 2 ~ 60mm, and working pressure is greater than 1MPa, and bursting pressure is greater than 3MPa;
Described mesoglea has some layers, and quantity is identical with the quantity of described enhancement layer, closely connects the outer surface of every layer of described enhancement layer, and the quality proportioning of the material of described mesoglea comprises 6 parts of glass fiber cloths, 3 parts of potteries and 1 part of silicon nitride, and wall thickness range is 2 ~ 30mm;
Described outer glue-line closely connects the outer surface of described mesoglea; for the protection of described enhancement layer and described mesoglea; material comprises a kind of of styrene butadiene rubber, nitrile butadiene rubber, butyl rubber, neoprene, Thiokol, urethane rubber, lactoprene, chlorine vulcanized polyethylene rubber, silicone rubber, fluorine rubber, butadiene rubber, isoprene rubber and ethylene propylene rubber; wall thickness range is 1.5 ~ 2.5mm; out of roundness is less than 20%, and maximum service pressure is greater than 4MPa.
In a preferred embodiment of the present invention, the described institute transmission medium of described inner glue layer comprises petroleum base liquid and water fluid.
In a preferred embodiment of the present invention, the thickness of described enhancement layer is greater than or equal to the thickness of described mesoglea.
In a preferred embodiment of the present invention, the quantity of described enhancement layer is 1 ~ 6.
In a preferred embodiment of the present invention, between described inner glue layer, described interior compound protective layer, described enhancement layer, described mesoglea and described outer glue-line, adopt Bond to be connected.
In a preferred embodiment of the present invention, described in state inner glue layer, described interior compound protective layer, described enhancement layer, described mesoglea and described outer glue-line total thickness be less than 600mm.
In a preferred embodiment of the present invention, the operating temperature of described hydralic hose is-40 ~ 100 ℃.
The invention has the beneficial effects as follows: hydralic hose of the present invention has that stable chemical nature, structural stability, oil resistance, high temperature resistant, ageing-resistant, weather resistance, pressure-bearing are high, body in conjunction with closely, use soft, be out of shape the advantages such as little, good resistance to circumnutating property and fatigue resistance, firm practicality, intensity are high, wear-resistant, novel structure, long service life, on hydralic hose universal, have market prospects widely.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also according to these accompanying drawings, obtain other accompanying drawing, wherein:
Fig. 1 is the structural drawing of a preferred embodiment of a kind of hydralic hose of the present invention;
In accompanying drawing, the mark of each parts is as follows: 1, inner glue layer, 2, interior compound protective layer, 3, enhancement layer, 4, mesoglea, 5, outer glue-line.
Embodiment
Below the technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Embodiment based in the present invention, those of ordinary skills, not making all other embodiments that obtain under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention comprises:
A hydralic hose, comprising:
(1) inner glue layer 1,
(2) interior compound protective layer 2,
(3) enhancement layer 3,
(4) mesoglea 4,
(5) outer glue-line 5,
Described inner glue layer 1 is hollow tube, for bearing the pressure of institute's transmission medium, material is a kind of of silicone rubber, fluorine rubber, Thiokol, chlorohydrin rubber, nitrile butadiene rubber, lactoprene, urethane rubber, butyl rubber, the inside diameter ranges of described inner glue layer 1 is 4.6 ~ 52mm, wall thickness range is 0.8 ~ 1.6mm, and uneven thickness evenness is less than 0.5mm;
Described interior compound protective layer 2 closely connects the outer surface of described inner glue layer 1, for the protection of inner glue layer 1, isolation inner glue layer 1 and enhancement layer 3 and protection enhancement layer 3, the quality proportioning of material comprises 5 parts of glass fiber cloths, 3 parts of potteries, 1 part of silicon nitride, 0.5 part of silicon carbide and 0.5 part of zirconium boride, wall thickness range is 0.2 ~ 0.8mm, and the maximum temperature that can bear is greater than 700 ℃;
Described enhancement layer 3 closely connects the outer surface of described interior compound protective layer 2, working pressure for the protection of described inner glue layer 1 and described interior compound protective layer 2, described enhancement layer 3 has some layers, material is braided steel wire framework material, wall thickness is 2 ~ 60mm, working pressure is greater than 1MPa, and bursting pressure is greater than 3MPa;
Described mesoglea 4 has some layers, quantity is identical with the quantity of described enhancement layer 3, closely connect the outer surface of every layer of described enhancement layer 3, the quality proportioning of the material of described mesoglea 4 comprises 6 parts of glass fiber cloths, 3 parts of potteries and 1 part of silicon nitride, and wall thickness range is 2 ~ 30mm;
Described outer glue-line 5 closely connects the outer surface of described mesoglea 4; for the protection of described enhancement layer 3 and described mesoglea 4; material comprises a kind of of styrene butadiene rubber, nitrile butadiene rubber, butyl rubber, neoprene, Thiokol, urethane rubber, lactoprene, chlorine vulcanized polyethylene rubber, silicone rubber, fluorine rubber, butadiene rubber, isoprene rubber and ethylene propylene rubber; wall thickness range is 1.5 ~ 2.5mm; out of roundness is less than 20%, and maximum service pressure is greater than 4MPa.
Preferably, the described institute transmission medium of described inner glue layer 1 comprises petroleum base liquid and water fluid, petroleum base liquid comprises mineral oil, soluble oil, hydraulic oil, fuel oil and lubricated wet goods in fact, water fluid comprises emulsified liquid, oil-water emulsion and water, can transmission medium kind many, scope is wide, make the applicable scope of hydralic hose wide, be conducive to mass production, use and promote.
Preferably, the thickness of described enhancement layer 3 is greater than or equal to the thickness of described mesoglea 4, and enhancement layer 3 and mesoglea 4 layering correspondences are connected and fixed, and have strengthened the pressure-bearing scope of body, and along with the increase of the quantity of enhancement layer 3, its corresponding pressure-bearing scope also increases.
Preferably, the quantity of described enhancement layer 3 is 1 ~ 6, can select according to needed bearing capacity the enhancement layer 3 of varying number, novel structure, convert various.
Preferably; between described inner glue layer 1, described interior compound protective layer 2, described enhancement layer 3, described mesoglea 4 and described outer glue-line 5, adopt Bond to be connected; wherein Bond is the assurance of bonding strength between abrasive material and matrix, and bond effect is good, bonding is tight, serviceability temperature scope is wide.
Preferably, described in state inner glue layer 1, described interior compound protective layer 2, described enhancement layer 3, described mesoglea 4 and be less than 600mm with the total thickness of described outer glue-line 5, meet the universal standard of general hydralic hose.
Preferably, the operating temperature of described hydralic hose is-40 ~ 100 ℃, and for general temperature and field of employment, this hydralic hose all can safety and stability be used.
The beneficial effect of hydralic hose of the present invention is:
One, by using inner glue layer, interior compound protective layer, enhancement layer, mesoglea to form colloid with outer glue-line, novel structure, connect closely, bearing capacity greatly, diverse in function, stable chemical nature, be conducive to mass production and popularization;
Two, by using the material of a kind of inner glue layer as colloid of the specific rubbers such as silicone rubber, fluorine rubber, Thiokol, chlorohydrin rubber, nitrile butadiene rubber, lactoprene, urethane rubber, butyl rubber, high temperature resistant, oil resistant base, quality is tight, bearing capacity is high, sturdy and durable;
Three, with respect to general hydraulic tube, the hydraulic tube here adopts multilayer enhancement layer and mesoglea structure, has increased the bearing strength of hydralic hose, convenient and practical.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. a hydralic hose, comprising:
(1) inner glue layer,
(2) interior compound protective layer,
(3) enhancement layer,
(4) mesoglea,
(5) outer glue-line,
It is characterized in that,
Described inner glue layer is hollow tube, for bearing the pressure of institute's transmission medium, material is a kind of of silicone rubber, fluorine rubber, Thiokol, chlorohydrin rubber, nitrile butadiene rubber, lactoprene, urethane rubber, butyl rubber, the inside diameter ranges of described inner glue layer is 4.6 ~ 52mm, wall thickness range is 0.8 ~ 1.6mm, and uneven thickness evenness is less than 0.5mm;
Described interior compound protective layer closely connects the outer surface of described inner glue layer, for the protection of inner glue layer, isolation inner glue layer and enhancement layer and protection enhancement layer, the quality proportioning of material comprises 5 parts of glass fiber cloths, 3 parts of potteries, 1 part of silicon nitride, 0.5 part of silicon carbide and 0.5 part of zirconium boride, wall thickness range is 0.2 ~ 0.8mm, and the maximum temperature that can bear is greater than 700 ℃;
Described enhancement layer closely connects the outer surface of described interior compound protective layer, and for the protection of the working pressure of described inner glue layer and described interior compound protective layer, described enhancement layer has some layers, material is braided steel wire framework material, wall thickness is 2 ~ 60mm, and working pressure is greater than 1MPa, and bursting pressure is greater than 3MPa;
Described mesoglea has some layers, and quantity is identical with the quantity of described enhancement layer, closely connects the outer surface of every layer of described enhancement layer, and the quality proportioning of the material of described mesoglea comprises 6 parts of glass fiber cloths, 3 parts of potteries and 1 part of silicon nitride, and wall thickness range is 2 ~ 30mm;
Described outer glue-line closely connects the outer surface of described mesoglea; for the protection of described enhancement layer and described mesoglea; material comprises a kind of of styrene butadiene rubber, nitrile butadiene rubber, butyl rubber, neoprene, Thiokol, urethane rubber, lactoprene, chlorine vulcanized polyethylene rubber, silicone rubber, fluorine rubber, butadiene rubber, isoprene rubber and ethylene propylene rubber; wall thickness range is 1.5 ~ 2.5mm; out of roundness is less than 20%, and maximum service pressure is greater than 4MPa.
2. hydralic hose according to claim 1, is characterized in that, the described institute transmission medium of described inner glue layer comprises petroleum base liquid and water fluid.
3. hydralic hose according to claim 1, is characterized in that, the thickness of described enhancement layer is greater than or equal to the thickness of described mesoglea.
4. hydralic hose according to claim 1, is characterized in that, the quantity of described enhancement layer is 1 ~ 6.
5. hydralic hose according to claim 1, is characterized in that, between described inner glue layer, described interior compound protective layer, described enhancement layer, described mesoglea and described outer glue-line, adopts Bond to be connected.
6. hydralic hose according to claim 1, is characterized in that, described in state inner glue layer, described interior compound protective layer, described enhancement layer, described mesoglea and described outer glue-line total thickness be less than 600mm.
7. hydralic hose according to claim 1, is characterized in that, the operating temperature of described hydralic hose is-40 ~ 100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310720379.9A CN103697254A (en) | 2013-12-24 | 2013-12-24 | Hydraulic rubber hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310720379.9A CN103697254A (en) | 2013-12-24 | 2013-12-24 | Hydraulic rubber hose |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103697254A true CN103697254A (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310720379.9A Pending CN103697254A (en) | 2013-12-24 | 2013-12-24 | Hydraulic rubber hose |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982715A (en) * | 2014-06-04 | 2014-08-13 | 浙江海王塑胶有限公司 | Temperature-resistant hydraulic rubber hose |
| CN104315261A (en) * | 2014-08-28 | 2015-01-28 | 孙金福 | Hydraulic oil pipe |
| CN104613248A (en) * | 2015-01-30 | 2015-05-13 | 柳州市同进汽车零部件制造有限公司 | Rubber pipe |
| CN104610746A (en) * | 2015-01-28 | 2015-05-13 | 柳州市中配橡塑配件制造有限公司 | Compressed air delivery pipe for automobiles |
| CN104728534A (en) * | 2015-01-30 | 2015-06-24 | 柳州市同进汽车零部件制造有限公司 | Rubber pipe with enhancement layer |
| CN105020498A (en) * | 2015-07-28 | 2015-11-04 | 苏州市相城区明达复合材料厂 | Oil-resistant and corrosion-resistant rubber pipe |
| CN105179336A (en) * | 2015-09-22 | 2015-12-23 | 重庆市合川区环宇配件厂 | Hydraulic assembly for automobile accessory machining |
| CN106322003A (en) * | 2015-06-30 | 2017-01-11 | 中裕软管科技有限公司 | Multilayered rubber-plastic composite hose and machining process thereof |
| CN107325358A (en) * | 2017-08-31 | 2017-11-07 | 彭超昀莉 | A kind of freeze proof automobile engine hollow tube and preparation method thereof |
| CN108662307A (en) * | 2018-03-30 | 2018-10-16 | 南通美莱达科技有限公司 | Fire-retardant hydralic hose of a kind of anti-high impulse of high-strength ageing and preparation method thereof |
| WO2019036838A1 (en) * | 2017-08-21 | 2019-02-28 | 张进德 | Improved oil and gas delivery pipe |
| CN112393033A (en) * | 2020-12-19 | 2021-02-23 | 河南给力软管有限公司 | Novel rubber-plastic composite hydraulic hose and preparation method thereof |
| CN113154145A (en) * | 2021-05-26 | 2021-07-23 | 康瑞森工程科技(青岛)有限公司 | Flexible bendable rubber ceramic hose and production method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201934031U (en) * | 2011-01-25 | 2011-08-17 | 孟庆义 | Oil pipe |
| CN202203540U (en) * | 2011-08-11 | 2012-04-25 | 陕西迈纬尔胶管有限公司 | 3*3-structure hydraulic rubber pipe woven by high-pressure steel wires |
| CN102734571A (en) * | 2012-07-02 | 2012-10-17 | 漯河市利通橡胶有限公司 | Compact steel wire braided rubber hose and preparation method thereof |
| CN102889437A (en) * | 2012-10-08 | 2013-01-23 | 孟庆义 | Flexible compound oil pipe |
| CN203336077U (en) * | 2013-06-25 | 2013-12-11 | 天津市圣丰陆海石油装备技术服务有限公司 | Corrosion-resistant petroleum rubber tube |
-
2013
- 2013-12-24 CN CN201310720379.9A patent/CN103697254A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201934031U (en) * | 2011-01-25 | 2011-08-17 | 孟庆义 | Oil pipe |
| CN202203540U (en) * | 2011-08-11 | 2012-04-25 | 陕西迈纬尔胶管有限公司 | 3*3-structure hydraulic rubber pipe woven by high-pressure steel wires |
| CN102734571A (en) * | 2012-07-02 | 2012-10-17 | 漯河市利通橡胶有限公司 | Compact steel wire braided rubber hose and preparation method thereof |
| CN102889437A (en) * | 2012-10-08 | 2013-01-23 | 孟庆义 | Flexible compound oil pipe |
| CN203336077U (en) * | 2013-06-25 | 2013-12-11 | 天津市圣丰陆海石油装备技术服务有限公司 | Corrosion-resistant petroleum rubber tube |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982715A (en) * | 2014-06-04 | 2014-08-13 | 浙江海王塑胶有限公司 | Temperature-resistant hydraulic rubber hose |
| CN104315261A (en) * | 2014-08-28 | 2015-01-28 | 孙金福 | Hydraulic oil pipe |
| CN104610746A (en) * | 2015-01-28 | 2015-05-13 | 柳州市中配橡塑配件制造有限公司 | Compressed air delivery pipe for automobiles |
| CN104613248A (en) * | 2015-01-30 | 2015-05-13 | 柳州市同进汽车零部件制造有限公司 | Rubber pipe |
| CN104728534A (en) * | 2015-01-30 | 2015-06-24 | 柳州市同进汽车零部件制造有限公司 | Rubber pipe with enhancement layer |
| CN106322003A (en) * | 2015-06-30 | 2017-01-11 | 中裕软管科技有限公司 | Multilayered rubber-plastic composite hose and machining process thereof |
| CN105020498A (en) * | 2015-07-28 | 2015-11-04 | 苏州市相城区明达复合材料厂 | Oil-resistant and corrosion-resistant rubber pipe |
| CN105179336A (en) * | 2015-09-22 | 2015-12-23 | 重庆市合川区环宇配件厂 | Hydraulic assembly for automobile accessory machining |
| WO2019036838A1 (en) * | 2017-08-21 | 2019-02-28 | 张进德 | Improved oil and gas delivery pipe |
| CN107325358A (en) * | 2017-08-31 | 2017-11-07 | 彭超昀莉 | A kind of freeze proof automobile engine hollow tube and preparation method thereof |
| CN107325358B (en) * | 2017-08-31 | 2018-10-02 | 彭超昀莉 | A kind of freeze proof automobile engine hollow tube and preparation method thereof |
| CN108662307A (en) * | 2018-03-30 | 2018-10-16 | 南通美莱达科技有限公司 | Fire-retardant hydralic hose of a kind of anti-high impulse of high-strength ageing and preparation method thereof |
| CN112393033A (en) * | 2020-12-19 | 2021-02-23 | 河南给力软管有限公司 | Novel rubber-plastic composite hydraulic hose and preparation method thereof |
| CN113154145A (en) * | 2021-05-26 | 2021-07-23 | 康瑞森工程科技(青岛)有限公司 | Flexible bendable rubber ceramic hose and production method thereof |
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Application publication date: 20140402 |