CN103527869B - A kind of damping oil suction hose and manufacturing process thereof - Google Patents

A kind of damping oil suction hose and manufacturing process thereof Download PDF

Info

Publication number
CN103527869B
CN103527869B CN201310520031.5A CN201310520031A CN103527869B CN 103527869 B CN103527869 B CN 103527869B CN 201310520031 A CN201310520031 A CN 201310520031A CN 103527869 B CN103527869 B CN 103527869B
Authority
CN
China
Prior art keywords
layer
steel wire
oil suction
suction hose
damping oil
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.)
Active
Application number
CN201310520031.5A
Other languages
Chinese (zh)
Other versions
CN103527869A (en
Inventor
阳文峰
黄永超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Municipal High Flexible Pipe Co Ltd
Original Assignee
Guangzhou Municipal High Flexible Pipe Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangzhou Municipal High Flexible Pipe Co Ltd filed Critical Guangzhou Municipal High Flexible Pipe Co Ltd
Priority to CN201310520031.5A priority Critical patent/CN103527869B/en
Publication of CN103527869A publication Critical patent/CN103527869A/en
Application granted granted Critical
Publication of CN103527869B publication Critical patent/CN103527869B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00Hoses, i.e. flexible pipes
    • F16L11/04Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/088Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising a combination of one or more layers of a helically wound cord or wire with one or more braided layers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56Winding and joining, e.g. winding spirally
    • B29C53/566Winding and joining, e.g. winding spirally for making tubular articles followed by compression
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L43/00Bends; Siphons

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The invention discloses a kind of damping oil suction hose and manufacturing process thereof, damping oil suction hose comprises inner glue layer, outer glue-line and layer of fibers, and layer of fibers is located between inner glue layer and outer glue-line; In the axial direction, damping oil suction hose comprises intermediate section and is connected to the connecting head at intermediate section two ends; Between layer of fibers and outer glue-line, steel wire is wound with at intermediate section.Manufacturing process comprises shaping inner glue layer, winding fiber mesh cloth, winding steel wire, the outer glue-line of winding under the cooperation of scale.Sebific duct strength and stiffness of the present invention are good, and the flat performance of anti-suction is good.

Description

A kind of damping oil suction hose and manufacturing process thereof
Technical field
The present invention relates to damping oil suction hose.
Background technique
Now, the application of oil suction hose very extensive, as medium in hydraulic system, oil-way system.
Existing oil suction hose is primarily of inner glue layer, outer glue-line and the layer of fibers between inner glue layer and outer glue-line form, although layer of fibers has good bending properties, resistance to high temperature and wear-resisting property, and density ratio density wiry is much little, tensile strength is more than the twice of steel wire, stretch modulus is suitable with steel wire, fracture extension rate is only 1/4th of steel wire, improve the strength and stiffness of oil suction hose, reduce weight, but its radial bearing capacity is little, and in oil suction hose, usually can produce negative pressure, therefore, the flat ability of anti-suction of the oil suction hose of this structure, radial rigidity is little.
For solving the problems of the technologies described above, also occurred arranging steel screen layer between inner glue layer and outer glue-line, although the oil suction hose of this structure enhances radial bearing capacity, but after being provided with steel screen layer, the flexibility of attachment portion, two ends is poor, therefore, grafting difficulty very, particularly for the situation that two plug connectors are close especially, as oil suction hose being plugged on two plug connectors, then become difficulty very.
Summary of the invention
The object of this invention is to provide a kind of strength and stiffness good, the flat performance of anti-suction is good, and is convenient to again the damping oil suction hose of grafting.
Another object of the present invention is to provide a kind of manufacturing process of damping oil suction hose, and this worker artistic skill ensures that damping oil suction hose strength and stiffness are good, and the flat performance of anti-suction is good, and is convenient to grafting again.
For achieving the above object, a kind of damping oil suction hose, comprises inner glue layer, outer glue-line and layer of fibers, and layer of fibers is located between inner glue layer and outer glue-line; In the axial direction, damping oil suction hose comprises intermediate section and is connected to the connecting head at intermediate section two ends; Between layer of fibers and outer glue-line, steel wire is wound with at intermediate section.
Further, described layer of fibers is fiber mesh layer.
Further, damping oil suction hose is straight tube.
Further, damping oil suction hose is bend pipe, and intermediate section is positioned at bending place.
The beneficial effect of damping oil suction hose of the present invention is: when two connecting heads are connected to after on plug connector, radial force is born by intermediate section, and there is inner glue layer, layer of fibers, steel wire floor and outer glue-line due to intermediate section, the anti-radial force of winding steel wire is good, therefore, the intensity of this damping oil suction hose, good rigidity, the flat performance of anti-suction is good.Owing to not being wound with steel wire on connecting head, be only made up of inner glue layer, layer of fibers and outer glue-line, and fibrolaminar good bending property, tensility are good, like this, not only the intensity of connecting head is better, and flexible, be easy to bending, therefore, be convenient to connecting head to be plugged on plug connector.Like this, not only strength and stiffness are good for the damping oil suction hose of this structure, and the flat performance of anti-suction is good, and are convenient to again the damping oil suction hose of grafting.
For reaching another object above-mentioned, the process step manufacturing damping oil suction hose is.
(1) on swingle, inner glue layer is wound around.
(2) on inner glue layer, fiber mesh cloth is wound around.
(3) winding steel wire on fiber mesh cloth, concrete step is: arrange scale in the intermediate section side of each damping oil suction hose, and when swingle rotates, steel wire automatic winding on fiber mesh cloth, and utilizes scale to control position and the pitch of steel wire winding.
(4) outer glue-line is wound around.
(5) Bao Shuibu.
(6) sulfuration.
(7) water cloth is torn open.
(8) cut off.
Further, steel wire is connected with between adjacent damping oil suction hose intermediate section steel wire.
Another technological scheme reaching another object above-mentioned is: the step manufacturing the technique of damping oil suction hose is.
(1) shaping inner glue layer on core rod.
(2) on inner glue layer, fiber mesh cloth is wound around.
(3) winding steel wire on fiber mesh cloth, concrete step is: arrange arc scale in the intermediate section side of damping oil suction hose, and when core rod rotates, steel wire automatic winding on fiber mesh cloth, and utilizes scale to control position and the pitch of steel wire winding.
(4) outer glue-line is wound around.
(5) Bao Shuibu.
(6) sulfuration.
(7) water cloth is torn open.
(8) tube head pipe tail is pruned.
Above-mentioned manufacturing process, because the intermediate section side at damping oil suction hose arranges scale, utilize scale can control position and the pitch of steel wire winding, therefore, can ensure that steel wire can not be wound on connecting head on the one hand, the steel wire pitch on the other hand by controlling intermediate section then can ensure the strength and stiffness of damping oil suction hose, like this, damping oil suction hose strength and stiffness are good, and the flat performance of anti-suction is good, and is convenient to grafting again.When shaping straight tube, on same swingle, the shaping multiple damping oil suction hose of energy, can enhance productivity like this, and in order to improve the winding efficiency of steel wire, then between adjacent damping oil suction hose intermediate section steel wire, be connected with steel wire, to realize the object realizing continuous winding steel wire on fiber mesh cloth.
Accompanying drawing explanation
Fig. 1 is the structural representation of straighttube-type damping oil suction hose.
Fig. 2 is the structural representation of bent-tube boiler damping oil suction hose.
Fig. 3 is A-A sectional view.
Fig. 4 is B-B sectional view.
Fig. 5 is the device structure schematic diagram of shaping straight tube.
Fig. 6 is the device structure schematic diagram of shaping bend pipe.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.
First mode of execution.
As shown in Figure 1, damping oil suction hose is straight tube, in the axial direction, and damping oil suction hose intermediate section 11 and be connected to the connecting head 12 at intermediate section two ends.As shown in figures 1 and 3, in radial directions, damping oil suction hose comprises inner glue layer 21, outer glue-line 22 and layer of fibers 23, layer of fibers optimum fiber scrim layer, fiber mesh layer good bending property, stretch-proof performance are good, and fiber mesh layer is reticular structure, fiber has active force each other, therefore, not only the intensity of damping oil suction hose is better, and flexible.As shown in Figure 1 and Figure 4, between layer of fibers and outer glue-line, steel wire 24 is wound with at intermediate section.
The damping oil suction hose of said structure, owing to being wound with steel wire 24 at intermediate section, the anti-radial force of winding steel wire 24 is good, and therefore, the intensity of this damping oil suction hose, good rigidity, the flat performance of anti-suction is good.Owing to not being wound with steel wire on connecting head, be only made up of inner glue layer, layer of fibers and outer glue-line, and fibrolaminar good bending property, tensility are good, like this, not only the intensity of connecting head is better, and flexible, be easy to bending, therefore, be convenient to connecting head to be plugged on plug connector.
The method manufacturing above-mentioned damping oil suction hose is.
(1) inner glue layer material is extruded into sheet by mixing, heat refining, filtration, heat refining after adding sulphur.
(2) as shown in Figure 5, swingle 3 is arranged in frame 5, swingle 3 is driven by drive unit, described drive unit comprises motor, first belt pulley, belt and the second belt pulley, first belt pulley is arranged on the output shaft of motor, second belt pulley is arranged on swingle, belt is located between the first belt pulley and the second belt pulley, motor is by the first belt pulley, belt and the second belt pulley drive swingle 3 to rotate, when swingle rotates, the sheet glue-line be extruded is wound on swingle 3 and forms inner glue layer, this inner glue layer includes multiple damping oil suction hose.
(3) on inner glue layer, apply rubber cement, inner glue layer is wound around fiber mesh cloth, fiber mesh cloth is bonded on inner glue layer by rubber cement.
(4) winding steel wire on fiber mesh cloth, concrete step is: install scale 4 in the side of swingle 3; At the corresponding scale yardstick of the intermediate section of each damping oil suction hose, when swingle 3 rotates, steel wire automatic winding is on fiber mesh cloth, and a wherein effect of described fiber mesh cloth to prevent the steel wire be wound around from sliding axially, and then can control position and the pitch of steel wire winding under the common cooperation of scale.Therefore, can ensure that steel wire can not be wound on connecting head on the one hand, the steel wire pitch on the other hand by controlling intermediate section then can ensure the strength and stiffness of damping oil suction hose, like this, damping oil suction hose strength and stiffness are good, and the flat performance of anti-suction is good, and is convenient to grafting again.In winding steel wire process, be improve the winding efficiency of steel wire, thus enhance productivity, after the steel wire winding of a wherein damping oil suction hose intermediate section completes, striding across that a steel wire makes at connector position can continuous print winding steel wire between intermediate section.
(5) outer glue line material be extruded into sheet by mixing, heat refining, filtration, heat refining after adding sulphur and be wound into the outer glue-line of formation on the shaping semi-finished product outer wall of step (4).
(5) Bao Shuibu.
(6) sulfuration.
(7) water cloth is torn open.
(8) cut off.
Second mode of execution.
As shown in Figure 2, damping oil suction hose is bend pipe, and in the axial direction, damping oil suction hose intermediate section 11 and be connected to the connecting head 12 at intermediate section two ends, wherein bending part is intermediate section.As shown in Figures 2 and 3, in radial directions, damping oil suction hose comprises inner glue layer 21, outer glue-line 22 and layer of fibers 23, layer of fibers optimum fiber scrim layer, fiber mesh layer good bending property, stretch-proof performance are good, and fiber mesh layer is reticular structure, fiber has active force each other, therefore, not only the intensity of damping oil suction hose is better, and flexible.As shown in Figure 2 and Figure 4, between layer of fibers and outer glue-line, steel wire 24 is wound with at intermediate section.
The damping oil suction hose of said structure, owing to being wound with steel wire 24 at intermediate section, the anti-radial force of winding steel wire 24 is good, and therefore, the intensity of this damping oil suction hose, good rigidity, the flat performance of anti-suction is good.Owing to not being wound with steel wire on connecting head, be only made up of inner glue layer, layer of fibers and outer glue-line, and fibrolaminar good bending property, tensility are good, like this, not only the intensity of connecting head is better, and flexible, be easy to bending, therefore, be convenient to connecting head to be plugged on plug connector.
The method manufacturing above-mentioned damping oil suction hose is.
(1) manufacture a core rod 6, as shown in Figure 6, core rod 6 is made up of two sections of small mould cores, and two small mould cores vertically make core rod be L shape mutually, are arc transition in bending place.
(2) utilize core rod at in-mold molding inner glue layer 21.
(3) be installed on worktable 7 by one end of core rod, rotate core rod, and apply rubber cement on inner glue layer 21, inner glue layer 21 is wound around fiber mesh cloth 23, and fiber mesh cloth 23 is bonded on inner glue layer 21 by rubber cement.
(4) winding steel wire 24 on fiber mesh cloth 23, concrete step is: install scale in the side of core rod 6; When core rod 6 rotates, steel wire 24 is wound on fiber mesh cloth 23, and a wherein effect of described fiber mesh cloth to prevent the steel wire be wound around from sliding axially, and then can control position and the pitch of steel wire winding under the common cooperation of scale.Therefore, can ensure that steel wire can not be wound on connecting head on the one hand, the steel wire pitch on the other hand by controlling intermediate section then can ensure the strength and stiffness of damping oil suction hose, like this, damping oil suction hose strength and stiffness are good, and the flat performance of anti-suction is good, and is convenient to grafting again.
(5) outer glue line material be extruded into sheet by mixing, heat refining, filtration, heat refining after adding sulphur and be wound into the outer glue-line 22 of formation on the shaping semi-finished product outer wall of step (4).
(5) Bao Shuibu.
(6) sulfuration.
(7) water cloth is torn open.
(8) tube head pipe tail is pruned.

Claims (2)

1. manufacture a technique for damping oil suction hose, damping oil suction hose, comprise inner glue layer, outer glue-line and layer of fibers, layer of fibers is located between inner glue layer and outer glue-line; In the axial direction, damping oil suction hose comprises intermediate section and is connected to the connecting head at intermediate section two ends; Between layer of fibers and outer glue-line, be wound with steel wire at intermediate section, connecting head is not wound with steel wire, be only made up of inner glue layer, layer of fibers and outer glue-line; Steel wire is connected with between adjacent damping oil suction hose intermediate section steel wire; Described layer of fibers is fiber mesh layer; Damping oil suction hose is straight tube; It is characterized in that comprising the steps:
(1) inner glue layer material is extruded into sheet by mixing, heat refining, filtration, heat refining after adding sulphur;
(2) swingle is arranged in frame, swingle is driven by drive unit, described drive unit comprises motor, the first belt pulley, belt and the second belt pulley, first belt pulley is arranged on the output shaft of motor, second belt pulley is arranged on swingle, belt is located between the first belt pulley and the second belt pulley, motor drives swingle to rotate by the first belt pulley, belt and the second belt pulley, when swingle rotates, the sheet glue-line be extruded is wound on swingle and forms inner glue layer, and this inner glue layer includes multiple damping oil suction hose;
(3) on inner glue layer, apply rubber cement, inner glue layer is wound around fiber mesh cloth, fiber mesh cloth is bonded on inner glue layer by rubber cement;
(4) winding steel wire on fiber mesh cloth, concrete step is: install scale in the side of swingle; At the corresponding scale yardstick of the intermediate section of each damping oil suction hose, when swingle rotates, steel wire automatic winding, on fiber mesh cloth, then can control position and the pitch of steel wire winding under the common cooperation of scale; In winding steel wire process, after the steel wire winding of a wherein damping oil suction hose intermediate section completes, striding across that a steel wire makes at connector position can continuous print winding steel wire between intermediate section;
(5) outer glue line material be extruded into sheet by mixing, heat refining, filtration, heat refining after adding sulphur and be wound into the outer glue-line of formation on the shaping semi-finished product outer wall of step (4);
(6) Bao Shuibu;
(7) sulfuration;
(8) water cloth is torn open;
(9) cut off.
2. manufacture a technique for damping oil suction hose, damping oil suction hose, comprise inner glue layer, outer glue-line and layer of fibers, layer of fibers is located between inner glue layer and outer glue-line; In the axial direction, damping oil suction hose comprises intermediate section and is connected to the connecting head at intermediate section two ends; Between layer of fibers and outer glue-line, be wound with steel wire at intermediate section, connecting head is not wound with steel wire, be only made up of inner glue layer, layer of fibers and outer glue-line; Described layer of fibers is fiber mesh layer; Damping oil suction hose is bend pipe, and intermediate section is positioned at bending place; It is characterized in that comprising the steps:
(1) manufacture a core rod, core rod is made up of two sections of small mould cores, and two small mould cores vertically make core rod be L shape mutually, are arc transition in bending place;
(2) utilize core rod at in-mold molding inner glue layer;
(3) be installed on worktable by one end of core rod, rotate core rod, and apply rubber cement on inner glue layer, inner glue layer is wound around fiber mesh cloth, and fiber mesh cloth is bonded on inner glue layer by rubber cement;
(4) winding steel wire on fiber mesh cloth, concrete step is: install scale in the side of core rod; When core rod rotates, steel wire winding, on fiber mesh cloth, then can control position and the pitch of steel wire winding under the common cooperation of scale;
(5) outer glue line material be extruded into sheet by mixing, heat refining, filtration, heat refining after adding sulphur and be wound into the outer glue-line of formation on the shaping semi-finished product outer wall of step (4);
(6) Bao Shuibu;
(7) sulfuration;
(8) water cloth is torn open;
(9) tube head pipe tail is pruned.
CN201310520031.5A 2013-10-30 2013-10-30 A kind of damping oil suction hose and manufacturing process thereof Active CN103527869B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310520031.5A CN103527869B (en) 2013-10-30 2013-10-30 A kind of damping oil suction hose and manufacturing process thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310520031.5A CN103527869B (en) 2013-10-30 2013-10-30 A kind of damping oil suction hose and manufacturing process thereof

Publications (2)

Publication Number Publication Date
CN103527869A CN103527869A (en) 2014-01-22
CN103527869B true CN103527869B (en) 2016-02-17

Family

ID=49930101

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310520031.5A Active CN103527869B (en) 2013-10-30 2013-10-30 A kind of damping oil suction hose and manufacturing process thereof

Country Status (1)

Country Link
CN (1) CN103527869B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104879595B (en) * 2015-06-08 2017-08-29 威海丰泰新材料科技股份有限公司 Slurry conveys rubber pipe bend

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1227137A (en) * 1967-06-02 1971-04-07
CN2586036Y (en) * 2002-10-01 2003-11-12 李竹洋 Fire retardant ultra-pressure wired rubber tube
CN201273405Y (en) * 2008-12-29 2009-07-15 浙江铁马汽车零部件有限公司 Novel ash removing pipe
CN102537538A (en) * 2011-12-15 2012-07-04 福安市东风橡胶制品有限公司 Fluorine rubber-coated hose having carbon fiber as reinforcement layer and manufacture process thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012107689A (en) * 2010-11-17 2012-06-07 Nichirin Co Ltd Bending preventive hose and method of manufacturing the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1227137A (en) * 1967-06-02 1971-04-07
CN2586036Y (en) * 2002-10-01 2003-11-12 李竹洋 Fire retardant ultra-pressure wired rubber tube
CN201273405Y (en) * 2008-12-29 2009-07-15 浙江铁马汽车零部件有限公司 Novel ash removing pipe
CN102537538A (en) * 2011-12-15 2012-07-04 福安市东风橡胶制品有限公司 Fluorine rubber-coated hose having carbon fiber as reinforcement layer and manufacture process thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
缠绕法生产夹布胶管的工艺;杨慈文;《橡胶工业》;20021231;第49卷(第10期);第610-612页 *

Also Published As

Publication number Publication date
CN103527869A (en) 2014-01-22

Similar Documents

Publication Publication Date Title
CN101708657B (en) Production method of composite material by multilayer diagonal winding and production line
CN101184603B (en) Underground and partly submerged pipe winding apparatus and method
CN101813216B (en) Wall tube material with composite structure and manufacture method thereof
CN102777708A (en) Fiber-woven pultrusion pipeline and production method
CN103527869B (en) A kind of damping oil suction hose and manufacturing process thereof
CN203906660U (en) Aramid fiber rubber belt
CN203765764U (en) Light partition plate vertical type die machine with built-in automatic die opening and closing device
CN203409840U (en) Sponge punching machine
CN2724981Y (en) Carriage type multicore mould set glass fibre reinforced plastic pipaline winding winding machine
CN100411856C (en) Making process of molded curved GRP lattice
CN205893574U (en) Net cover cloche
CN102303818A (en) Traveling hoisting machine
CN202282961U (en) Automatic roller blind device for greenhouse and roller blind shaft of device
CN213919701U (en) Production equipment for inorganic fiber reinforced thermoplastic plastic pipeline
CN202390052U (en) Connecting structure between lift transmission device and cage
CN106903781B (en) Core-pulling mold with automatic cleaning function
CN113547755B (en) High-strength roller
CN212288085U (en) Self-cleaning core rod for continuous molding of hollow gypsum batten
CN202298312U (en) Serial double-position barrel unit type twisting production device of steel strand
CN105398142A (en) High strength plastic steel pipe and manufacturing method thereof
CN203317756U (en) Continuously winding structured wall thermal-state tube manufacture equipment
CN204525511U (en) A kind of automation joint
CN201335213Y (en) Pneumatic brake hose
CN203048325U (en) Mud composite paper tube
CN202325182U (en) Lengthening sunshade cushion produced by special welding process

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant