CN104089101B - The manufacture method of ductile iron pipe - Google Patents
The manufacture method of ductile iron pipe Download PDFInfo
- Publication number
- CN104089101B CN104089101B CN201410312163.3A CN201410312163A CN104089101B CN 104089101 B CN104089101 B CN 104089101B CN 201410312163 A CN201410312163 A CN 201410312163A CN 104089101 B CN104089101 B CN 104089101B
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- CN
- China
- Prior art keywords
- polyethylene
- pipeline matrix
- iron pipe
- wall
- ductile iron
- 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.)
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Classifications
-
- 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
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/002—Grinding heads
-
- 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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe
-
- 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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
Abstract
The invention discloses a kind of ductile iron pipe and its manufacture method, ductile iron pipe includes pipeline matrix, the pipeline matrix inwall is processed through the roll flute of tooth form emery wheel grinding-head, hammered through the hammering part of wire brush again, inwall is set to reach 40 100 μm of roughness, cleanliness factor reaches Sa2.5 grades, pipeline matrix outer wall is hammered through the hammering part of wire brush, outer wall is set to reach 40 100 μm of roughness, cleanliness factor reaches Sa2.5 grades, the inside and outside wall of the pipeline matrix has been respectively coated with inside and outside polyethylene coating, and inside and outside polyethylene coating is linked to be entirety.Ductile iron pipe of the present invention, its corrosion resistance is strong, low cost.
Description
Technical field
The present invention relates to a kind of metal tube, the manufacture method of a kind of ductile iron pipe and ductile iron pipe is in particulard relate to.
Background technology
It is well known that the antiseptic property and sanitation performance of polythene material are extremely excellent, applied on steel pipe
Also more generally, the application but on ductile iron pipe not yet occurs, and this is primarily due to polyethylene for non-polar material, with steel
The surface cohesive force of iron-based material is relatively low, and the surface treatment of base material plays conclusive effect to coating quality.Due to internal surface of steel pipe
Face is relatively smooth, can be processed by pickling, ball blast, rust cleaning etc. and obtain good surface roughness and cleanliness factor, makes polyethylene material
The bed of material is preferably combined with base material, but nonetheless, the adhesive force between polyethylene and base material also only has 30N/10mm, positive reason
Requirement is disclosure satisfy that under condition, but when the situations such as water hammer are run into pipeline, suddenly negative pressure occurs, then have can for polyethylene coating
Can peeling off phenomenon, the service life of influence pipeline.Ductile iron pipe is made of centrifugal casting technique, and inner surface is relatively crude
Rough, the technique such as this coarse surface inapplicable pickling, rust cleaning, because acid solution can corrode scum silica frost to form pit, wants to obtain good
Good inside and outside surface quality, according to traditional polishing Shot Blasting technique, not only waste of resource and processing cost but also very high, institute
Not find also to be applied to polyethylene powder coating on ductile iron pipe at present.
The content of the invention
Primary and foremost purpose of the invention is to provide a kind of manufacture method of ductile iron pipe, can quickly by spheroidal graphite using the method
The inside and outside wall of cast iron pipe is polished into the surface with certain roughness, low cost of polishing, and the inside and outside wall of ductile iron pipe and
The adhesion of polyethylene layer is strong.
Another object of the present invention is to provide a kind of wire brush, the inside and outside wall of its body that can quickly polish, cost of polishing
It is low.
To achieve these goals, technical solution of the invention is：A kind of ductile iron pipe, including pipeline matrix,
The pipeline matrix inwall is processed through the roll flute of tooth form emery wheel grinding-head, then through the hammering part hammering of wire brush, reaches inwall
40-100 μm of roughness, cleanliness factor reaches Sa2.5 grades, and pipeline matrix outer wall is hammered through the hammering part of wire brush, reaches outer wall
To 40-100 μm of roughness, cleanliness factor reaches Sa2.5 grades, and the inside and outside wall of the pipeline matrix has been respectively coated with inside and outside polyethylene
Coating, inside and outside polyethylene coating is linked to be entirety.
Ductile iron pipe of the present invention, wherein, the pipeline matrix inwall is coated with cohesion adhesive ethylene layer, the cohesion
Vinyl coating is bonded on the pipeline matrix inwall by cohesion adhesive ethylene layer.
Ductile iron pipe of the present invention, wherein, the pipeline matrix outer wall is coated with outer polyethylene glue adhesive layer, described outer poly-
Vinyl coating is bonded on the pipeline matrix outer wall by outer polyethylene glue adhesive layer.
Ductile iron pipe of the present invention, wherein, the thickness of inside and outside polyethylene glue adhesive layer is 100-150 μm, inside and outside poly-
The thickness of vinyl coating is 250-1000 μm.
The manufacture method of ductile iron pipe of the present invention, it is characterised in that：Comprise the steps：(1) by ductile iron pipe
The faceted portions of the raised roll flute through tooth form emery wheel grinding-head of pipeline matrix inwall remove, and the inwall after removal projection is again through tooth form
The roll flute surface rubbing of emery wheel grinding-head, then with the inwall that the hammering part hammer swing sledge mill of wire brush is flat, reaches pipeline matrix inwall
To 40-100 μm of roughness, cleanliness factor reaches Sa2.5 grades, and pipeline matrix outer wall is hammered through the hammering part of wire brush, makes outer wall
40-100 μm of roughness is reached, cleanliness factor reaches Sa2.5 grades, and be heated to pipeline matrix between 180 DEG C -280 DEG C by (2), makes pipe
The temperature of road matrix exceedes the melting temperature of polyethylene and polyethylene binder, and polyethylene binder then is sprayed into pipeline base
The inside and outside wall surface of body, polyethylene powders are sprayed to the polyethylene binder of the inside and outside wall surface of pipeline matrix again afterwards
On.
The manufacture method of ductile iron pipe of the present invention, wherein, be sprayed in the step (2) in the pipeline matrix,
The thickness of the polyethylene glue stick of outer wall surface is 100-150 μm, is sprayed on the poly- second of the inside and outside wall surface of pipeline matrix
The thickness of alkene powder is 250-1000 μm.
The manufacture method of ductile iron pipe of the present invention, wherein, it is sprayed on the polyethylene of the inside and outside wall surface of pipeline matrix
Powder forms entirety.
The manufacture method of ductile iron pipe of the present invention, wherein, also including step (3) spraying polyethylene powder after, will be described
Pipeline matrix is heated in being transferred to curing oven, makes coating levelling, smooth appearance.
Tooth form emery wheel grinding-head of the present invention, including power transmission shaft, bistrique body, bistrique body are column, and bistrique body is provided with
Axially extending centre bore, bistrique body is enclosed within outside power transmission shaft by centre bore, and bistrique body and power transmission shaft interfix,
Bistrique body outer diameter face is provided with several roll flutes, and described several roll flutes are uniform along the circumference of the bistrique body, and respectively
The equal radially protruding of roll flute is in the outer diameter face of bistrique body, and each roll flute is along the axially extending of bistrique body.
Wire brush of the present invention, including power transmission shaft, adapter sleeve, some brush filaments, several hammer portion, hammering part are column
Body, the adapter sleeve is enclosed within the power transmission shaft and is mutually fixed with power transmission shaft, and one end of some brush filaments is both secured to institute
State on adapter sleeve outer wall, the other end of the every brush filament is fixed with a hammering part.
After using such scheme, because the inside and outside wall of pipeline matrix of ductile iron pipe of the present invention has been respectively coated with inside and outside gathering
Vinyl coating, the pipeline matrix of ductile iron pipe has good decay resistance in itself, then will be with good corrosion resistance
Inside and outside polyethylene coating be covered in inside and outside wall after, more enhance the overall decay resistance of ductile iron pipe, use the longevity
Life is greatly prolonged, and polyethylene coating is applied to conveying drinking water, has on water quality without influence, therefore ductile iron pipe of the present invention
There are rodent reclaimed water or sewage etc., and can be embedded in the soil with severe corrosive, the inwall of pipeline matrix is first through tooth
The roll flute removal of shape emery wheel grinding-head is raised simultaneously to be polished, then is hammered through wire brush, and pipeline matrix outer wall is hammered through wire brush, make it is interior,
Outer wall roughness, cleanliness factor reach requirement, strengthen the cohesive force of inside and outside polyethylene coating and the inside and outside wall of pipeline matrix, with tradition
Polishing, Shot Blasting technique compare, substantial amounts of ball blast material is avoided using the handling process of tooth form emery wheel grinding-head and wire brush
Consumption, reduce environmental pollution, cost substantially reduced, and efficiency is improved, and inside and outside polyethylene coating is linked to be entirety, it is ensured that pipe
The pressure medium conveyed in road will not be by coating stripping.
In addition, interior polyethylene coating is bonded on the pipeline matrix inwall by cohesion adhesive ethylene layer, can make interior
Polyethylene coating adhesive force is stronger, can reach 50N/10mm, can resist in pipeline and unexpected negative pressure occurs to polyethylene painting
The release effect of layer, it is ensured that the safety of coating.Outer polyethylene coating is bonded in pipeline matrix by outer polyethylene glue adhesive layer
On wall, outer polyethylene coating adhesive force can be made stronger.
The manufacture method of ductile iron pipe of the present invention, the roll flute removal of the inwall of pipeline matrix first through tooth form emery wheel grinding-head is convex
Rise and polish, then hammered through wire brush, pipeline matrix outer wall is hammered through wire brush, reaching inside and outside wall roughness, cleanliness factor will
Ask, strengthen the cohesive force of inside and outside polyethylene coating and the inside and outside wall of pipeline matrix, with traditional polishing, Shot Blasting technique phase
Than, the consumption of substantial amounts of ball blast material is avoided using the handling process of tooth form emery wheel grinding-head and wire brush, environmental pollution is reduced, into
Originally substantially reduce, and in the inventive method, pipeline matrix is first heated to uniform temperature, then it is spraying polyethylene binding agent, poly-
Ethylene powder, is reheated, and coating levelling, outward appearance can be made brighter and cleaner.
Tooth form emery wheel grinding-head of the present invention, due to bistrique body outer diameter face is provided with corner angle on roll flute, therefore roll flute can be with
The bossing of tube wall is removed, while roll flute surface can polish flat tube wall, grinding efficiency is greatly improved, and
And the surface of projection is particularly well-suited to, compared with the surface treatment mode of traditional sandblasting or ball blast, it is to avoid substantial amounts of throwing
The consumption of pellet, reduces environmental pollution, reduces cost.
Wire brush of the present invention, is fixed on adapter sleeve outer wall due to brush filament one end, the other end is respectively fixed with a hammer portion
Part, adapter sleeve is fixed on power transmission shaft, thus when wire brush at a high speed rotate when, hammering part can quickly with tube wall or outer wall
Mutually clash into, surface roughness is formed, compared with the surface treatment mode of traditional sandblasting or ball blast, it is to avoid substantial amounts of ball blast material
Consumption, reduce environmental pollution, and efficiency improve, cost reduction.
Brief description of the drawings
Fig. 1 is the sectional view of ductile iron pipe embodiment one of the present invention；
Fig. 2 is the sectional view of ductile iron pipe embodiment two of the present invention；
Fig. 3 is the sectional view of ductile iron pipe embodiment three of the present invention；
Fig. 4 is the sectional view of ductile iron pipe example IV of the present invention；
Fig. 5 is the cross-sectional view of tooth form emery wheel grinding-head of the present invention；
Fig. 6 is the use state figure of tooth form emery wheel grinding-head of the present invention；
Fig. 7 is the cross-sectional view of wire brush of the present invention；
Fig. 8,9 be wire brush of the present invention use state figure.
Specific embodiment
Embodiment one as shown in Figure 1, ductile iron pipe of the present invention, including pipeline matrix 11, the inwall of pipeline matrix 11 it is convex
Rise and removed through the faceted portions of the roll flute 43 of tooth form emery wheel grinding-head as shown in Figure 5, the inwall after removal projection is through tooth form emery wheel
The surface rubbing of roll flute 43 of bistrique, then through the hammering inwall of hammering part 54 of wire brush as shown in Figure 7, while will be convex in removal
The tough and tensile burr and corner angle produced during rising are removed clean, make that the inner wall smooth of pipeline matrix 11 is smooth, and roughness reaches 40-
100 μm, cleanliness factor reaches Sa2.5 grades, and the outer wall of pipeline matrix 11 is hammered through the hammering part 54 of wire brush, is made outside pipeline matrix 11
Wall reaches 40-100 μm of roughness, and cleanliness factor reaches Sa2.5 grades, as shown in figure 1, the inside and outside wall of pipeline matrix 11 is respectively coated with
There is inside and outside polyethylene coating 21,22, there is no interface to be linked to be entirety, this spheroidal graphite cast-iron between inside and outside polyethylene coating 21,22
Pipe is suitable for that discharge pressure fluctuation is smaller, will not produce the aqueous medium of water hammer and negative pressure and to be used in soil shear very small
Soil in.
Embodiment two as shown in Figure 2, is that the inwall of pipeline matrix 11 is coated with interior polyethylene with the difference of embodiment one
Gluing oxidant layer 31, interior polyethylene coating 21 is bonded on the inwall of pipeline matrix 11 by cohesion adhesive ethylene layer 31, this bulb
Graphite cast iron pipe is applied to the aqueous medium of the unexpected negative pressure of the larger and easy generation of discharge pressure fluctuation or is used in soil shear
In very small soil.
Embodiment three as shown in Figure 3, is that the outer wall of pipeline matrix 11 is coated with outer polyethylene with the difference of embodiment one
Gluing oxidant layer 32, outer polyethylene coating 22 is bonded on the outer wall of pipeline matrix 11 by outer polyethylene glue adhesive layer 32, this bulb
Graphite cast iron pipe be applied to the smaller aqueous medium that will not produce water hammer and negative pressure of discharge pressure fluctuation or be used in soil shear compared with
In big soil.
Example IV as shown in Figure 4, is that the inwall of pipeline matrix 11 is coated with interior polyethylene with the difference of embodiment one
Gluing oxidant layer 31, interior polyethylene coating 21 is bonded on the inwall of pipeline matrix 11 by cohesion adhesive ethylene layer 31, pipeline base
The outer wall of body 11 is coated with outer polyethylene glue adhesive layer 32, and outer polyethylene coating 22 is bonded in pipe by outer polyethylene glue adhesive layer 32
On the outer wall of road matrix 11, this ductile iron pipe is applied to the larger and easy water for producing unexpected negative pressure of discharge pressure fluctuation and is situated between
Matter is used in the larger soil of soil shear.
In the various embodiments described above, polyethylene glue stick selects the polyvinyl adhesive of modified by maleic acid anhydride graft, inside and outside
The thickness of polyethylene glue adhesive layer 31,32 is 100-150 μm, and the thickness of inside and outside polyethylene coating 21,22 is 250-1000
μm。
The manufacture method of ductile iron pipe of the present invention, comprises the steps：(1) by the pipeline matrix 11 of ductile iron pipe
The faceted portions of the raised roll flute through tooth form emery wheel grinding-head of wall remove, and the inwall after removal projection is again through tooth form emery wheel grinding-head
Roll flute surface rubbing, then with the inwall that the hammering part hammer swing sledge mill of wire brush is flat, makes the inwall of pipeline matrix 11 reach roughness
40-100 μm, cleanliness factor reaches Sa2.5 grades, and the outer wall of pipeline matrix 11 is hammered through the hammering part of wire brush, outer wall is reached slightly
40-100 μm of rugosity, cleanliness factor reaches Sa2.5 grades, and be heated to pipeline matrix 11 between 180 DEG C -280 DEG C by (2), makes pipeline base
The temperature of body 11 exceedes the melting temperature of polyethylene and polyethylene binder, then using liquid spray pump by polyethylene binder
The inside and outside wall surface of pipeline matrix 11 is sprayed to, polyethylene glue stick is gluing from the polyvinyl of modified by maleic acid anhydride graft
Agent, the thickness for being sprayed on the polyethylene glue stick of the inside and outside wall surface of pipeline matrix 11 is 100-150 μm, uses at once afterwards
Polyethylene powders are sprayed to dust gun the inside and outside wall surface of pipeline matrix 11, are sprayed on the inside and outside wall surface of pipeline matrix 11
The thickness of polyethylene powders be 250-1000 μm, and be sprayed on the polyethylene powders of the inside and outside wall surface of pipeline matrix 11
Between do not have interface, formed an entirety.(3) after spraying polyethylene powder, the pipeline matrix 11 is transferred in curing oven
Heated, be heated to 180~220 DEG C, made coating levelling, smooth appearance.
Above-mentioned dust gun can be replaced by fluid bed.
As shown in figure 5, tooth form emery wheel grinding-head of the present invention, including power transmission shaft 41, bistrique body 42, bistrique body 42 is post
Shape, bistrique body 42 is provided with axially extending centre bore, and bistrique body 42 is enclosed within outside power transmission shaft 41 by centre bore, and is ground
It is bonded between head body 42 and power transmission shaft 41 and is connect, the outer diameter face of bistrique body 42 is provided with multiple roll flutes 43, and multiple roll flutes 43 are along mill
The circumference of head body 42 is uniform, and the equal radially protruding of each roll flute 43, in the outer diameter face of bistrique body 42, each roll flute 43 is along mill
Head body 42 it is axially extending.
As shown in fig. 6, when using, tooth form emery wheel grinding-head of the present invention is positioned over into the inwall of pipe 61 to be polished, this is sent out
Bright tooth form emery wheel grinding-head and pipe 61 rotate in the opposite direction, and the corner angle on roll flute 43 can be by the lug boss of the inwall of pipe 61
Divide removal, the surface of roll flute 43 can polish flat the inwall of pipe 61, being particularly suited for surface has the spheroidal graphite cast-iron of more projection
Pipe.
As shown in fig. 7, wire brush of the present invention, including power transmission shaft 51, adapter sleeve 52, many brush filaments 53, multiple hammering parts
54, hammering part 54 is small column, and adapter sleeve 52 is enclosed within power transmission shaft 51, is bonded between adapter sleeve 52 and power transmission shaft 51 and connect,
Many one end of brush filament 53 are crimped on the outer wall of adapter sleeve 52 by pressure welding case, and the other end of every brush filament 53 is fixed with one
Individual hammering part 54, brush filament 53 uses steel wire, brush filament 53 and hammering part 54 to be linked together by casting.
As shown in Figure 8,9, when using, wire brush of the present invention is positioned in pipe 71 to be polished or near to be polished
The outer wall of pipe 71 is placed, and when wire brush rotates at a high speed, hammering part 54 mutually clashes into tube wall or outer wall, forms surface thick
Rugosity.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the scope of the present invention
It is defined, on the premise of design spirit of the present invention is not departed from, this area ordinary skill technical staff is to technology of the invention
Various modifications and improvement that scheme is made, all should fall into the protection domain of claims of the present invention determination.
Claims (1)
1. a kind of manufacture method of ductile iron pipe, the ductile iron pipe includes pipeline matrix (11), the pipeline matrix (11)
Inside and outside wall be respectively coated with inside and outside polyethylene coating (21,22), inside and outside polyethylene coating (21,22) is linked to be entirety, it is interior,
The thickness of outer polyethylene glue adhesive layer (31,32) is 100-150 μm, and the thickness of inside and outside polyethylene coating (21,22) is
250-1000 μm, the method comprises the steps：(1) by the projection of pipeline matrix (11) inwall of ductile iron pipe through tooth form sand
Take turns the faceted portions removal of the roll flute of bistrique, the inwall after removal projection again through the roll flute surface rubbing of tooth form emery wheel grinding-head, so
Afterwards with the inwall that the hammering part hammer swing sledge mill of wire brush is flat, pipeline matrix (11) inwall is set to reach 40-100 μm of roughness, it is clean
Degree reaches Sa2.5 grades, and pipeline matrix (11) outer wall is hammered through the hammering part of wire brush, outer wall is reached roughness 40-100 μ
M, cleanliness factor reaches Sa2.5 grades, and be heated to pipeline matrix (11) between 180 DEG C -280 DEG C by (2), makes the temperature of pipeline matrix (11)
Then polyethylene glue stick is sprayed to pipeline matrix (11) by degree more than polyethylene and the melting temperature of polyethylene glue stick
Inside and outside wall surface, polyethylene powders are sprayed to the polyethylene glue stick of the inside and outside wall surface of pipeline matrix (11) again afterwards
On, it is characterised in that：The wire brush includes power transmission shaft (51), adapter sleeve (52), some brush filaments (53), several hammering parts
(54), hammering part (54) be column, the adapter sleeve (52) be enclosed within the power transmission shaft (51) and with power transmission shaft (51) phase
Fixed, one end of some brush filaments (53) is both secured on the adapter sleeve (52) outer wall, the every brush filament (53)
The other end is respectively fixed with hammering part (54).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410312163.3A CN104089101B (en) | 2014-07-02 | 2014-07-02 | The manufacture method of ductile iron pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410312163.3A CN104089101B (en) | 2014-07-02 | 2014-07-02 | The manufacture method of ductile iron pipe |
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| Publication Number | Publication Date |
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| CN104089101A CN104089101A (en) | 2014-10-08 |
| CN104089101B true CN104089101B (en) | 2017-06-16 |
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| CN201410312163.3A Active CN104089101B (en) | 2014-07-02 | 2014-07-02 | The manufacture method of ductile iron pipe |
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| CN (1) | CN104089101B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111616472B (en) * | 2020-06-28 | 2022-06-17 | 深圳市金辉源投资有限公司 | Surface scratch-resistant pure gold product and preparation method thereof |
| CN112359270B (en) * | 2020-11-03 | 2021-06-25 | 广东新兴铸管有限公司 | Internal-spraying PE coating ductile iron pipe and preparation method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3356108A (en) * | 1963-02-26 | 1967-12-05 | Texas Instruments Inc | Composite tubular articles and method of making same |
| DE19845166B4 (en) * | 1998-10-01 | 2004-05-19 | Monti-Werkzeuge Gmbh | Rotary tool in the embodiment of a ring disc for surface processing |
| FR2907876B1 (en) * | 2006-10-26 | 2009-10-30 | Saint Gobain Pam Sa | PIPE, METHOD FOR MANUFACTURING SAME, AND CORRESPONDING TOOL |
| CN102466094A (en) * | 2010-11-14 | 2012-05-23 | 张永华 | Vent pipe structure |
| CN202037552U (en) * | 2011-02-12 | 2011-11-16 | 腾立实业有限公司 | Wiping wheel |
| CN203258214U (en) * | 2013-05-20 | 2013-10-30 | 河北省普蓝科工业科技有限公司 | Steel-plastic composite pipe |
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