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US 2017/0183828 A1Published application
Casing Tube and Manufacturing Method Thereof
AssigneeNingbo Shuxiang New Material Co., Ltd
InventorsBaoqi JIA, Ming FANG, Hui CHI
Life of this patent
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Abstract
A pre-buried casing tube uses glass fiber reinforced resin as the raw material to enhance the operation strength of the pre-buried casing tube, extend the service life of the pre-buried casing tube, and reduce maintenance cost of the railway transport system. The pre-buried casing tube includes at least one casing tube body, each casing tube body including at least one retaining element, the retaining elements provided in intervals along one side of the casing tube, each casing tube body disposed adjacently so as to form a passage for a screw, each retaining element provided in the passage for the screw.
Claims21
1-49. (canceled)
50:
- A casing tube for being pre-buried in a railway transport system, comprising:
- at least two tube bodies, each having an inner-side surface, an outer-side surface, and at least a retaining element provided at said inner-side surface, wherein when said two tube bodies are coupled with each other to form a tubular configuration, a screw channel is formed within said inner-side surfaces of said tube bodies for receiving a screw, wherein said retaining elements formed a thread portion integrally formed at said inner-side surfaces for engaging with the screw.
51:
- The casing tube, as recited in claim 50, further comprising at least one fastening unit, wherein said fastening unit is made of elastic material that when said fastening unit encircles around said outer-side surfaces of said tube bodies, said fastening unit provides a binding force to fasten said tube bodies with each other.
52:
- The casing tube, as recited in claim 50, wherein each of said tube bodies further has a plurality of locating elements spacedly and radially protruded from said outer-side surface, and at least one locating slot formed between two of said locating elements.
53:
- The casing tube, as recited in claim 50, wherein each of said tube bodies further has a first side portion and a second side portion extended radially, wherein said first side portions and said second side portions of said tube bodies are coupled with each other when said tube bodies are coupled with each other.
54:
- The casing tube, as recited in claim 53, further comprising a binding layer sandwiched between said first side portions and said second side portions of said tube bodies when said tube bodies are coupled with each other.
55:
- The casing tube, as recited in claim 53, wherein a distance between said inner-side surface and said outer-side surface is smaller than a thickness of each of said first side portion and said second side portion.
56:
- The casing tube, as recited in claim 53, wherein each of said tube bodies further has a holding member and a holding slot formed at said first side portion and said second side portion respectively, wherein when said first side portions and said second side portions of said tube bodies are coupled with each other, said holding members are engaged with said holding slots correspondingly so as to ensure said two tube bodies to be coupled with each other.
57:
- The casing tube, as recited in claim 50, wherein each of said tube bodies comprises a first body and a second body that said first body is overlapped with said second body to cover said second body, wherein said outer-side surface is defined at said second body and said inner-side surface is defined at said first body.
58:
- The casing tube, as recited in claim 57, wherein said first body is made of a mixture of long fiberglass and resin, and said second body is made of a mixture of short fiberglass and resin.
59:
- A casing tube for being pre-buried in a railway transport system, comprising:
- at least a tube body having an inner-side surface, an outer-side surface, at least a retaining element provided at said inner-side surface, and a screw channel is formed within said inner-side surface of said tube body for receiving a screw, wherein said retaining element forms a thread portion integrally formed at said inner-side surface for engaging with the screw, wherein said tube body is made of fiberglass reinforced resin composite material which comprises:
- at least one fiberglass selected from a group consisting of alkali-free fiberglass, medium-alkali fiberglass and the combination thereof;
- and
- at least one resin selected from a group consisting of o-phthalate unsaturated polyester resins, m-phthalate unsaturated polyester resins, bisphenol-A type unsaturated polyester resin, terephthalic unsaturated polyester resin, vinyl ester resin, epoxy resin, phenolic resin bisphenol-a type epoxy resin, bisphenol F epoxy resin, polyphenol glycidyl ether epoxy resin, aliphatic glycidyl ether epoxy resin, diglycidyl ester type resins, glycidylamine type epoxy resin, epoxidations of alkenes compounds, heterocyclic epoxy resin, mixed epoxy resin and the combination thereof, wherein the content of the resin is 30%-40%, wherein the content of the fiberglass is 60%-70%, wherein the fiberglass and the resin are mixed and heated to composite the fiberglass and the resin so as to form the fiberglass reinforced resin composite material.
2 more elements
60:
- The casing tube, as recited in claim 59, wherein the content of the fiberglass is 67%, and the content of the resin is 33%.
61:
- A method of manufacturing a pre-buried casing tube for a railway transport system, comprising the steps of:
- (a) forming a casing tube having an inner-side surface, an outer-side surface, and a screw channel within said inner-side surface of said tube body for receiving a screw, wherein said tube body is made of fiberglass reinforced resin composite material;
- and
- (b) forming at least a retaining element at said inner-side surface of said casing tube, wherein said retaining element forms a thread portion integrally formed at said inner-side surface for engaging with the screw.
1 more element
62:
- The method, as recited in claim 61, wherein said fiberglass reinforced resin composite material comprises:
- at least one fiberglass selected from a group consisting of alkali-free fiberglass, medium-alkali fiberglass and the combination thereof;
- and
- at least one resin selected from a group consisting of o-phthalate unsaturated polyester resins, m-phthalate unsaturated polyester resins, bisphenol-A type unsaturated polyester resin, terephthalic unsaturated polyester resin, vinyl ester resin, epoxy resin, phenolic resin bisphenol-a type epoxy resin, bisphenol F epoxy resin, polyphenol glycidyl ether epoxy resin, aliphatic glycidyl ether epoxy resin, diglycidyl ester type resins, glycidylamine type epoxy resin, epoxidations of alkenes compounds, heterocyclic epoxy resin, mixed epoxy resin and the combination thereof, wherein the content of the resin is 30%-40%, wherein the content of the fiberglass is 60%-70%, wherein the fiberglass and the resin are mixed and heated to composite the fiberglass and the resin so as to form the fiberglass reinforced resin composite material.
1 more element
63:
- The method, as recited in claim 61, wherein the step (a) further comprises the steps of:
- (a.1) forming at least two tube bodies, each of said tube bodies has a curved inner-side surface and a curved outer-side surface, wherein said retaining element is integrally formed at said curved inner-side surface of each of said tube bodies;
- and
- (a.2) coupling said tube bodies with each other to form said casing tube that said curved inner-side surfaces of said tube bodies form said inner-side surface of said casing tube and said curved outer-side surfaces of said tube bodies form said outer-side surface of said casing tube.
1 more element
64:
- The method, as recited in claim 63, wherein the step (a) further comprises a step of encircling at least a fastening unit around said outer-side surface of said casing tube to fasten said tube bodies together, wherein said fastening unit is made of elastic material that provides a binding force to fasten said tube bodies with each other.
65:
- The method, as recited in claim 63, wherein the step (a.1) further comprises a step of spacedly and radially protruding a plurality of locating elements from said curved outer-side surface of each of said tube bodies, wherein at least one locating slot is formed between two of said locating elements.
66:
- The method, as recited in claim 63, wherein the step (a.1) further comprises the steps of:
- (a.1.1) radially extending a first side portion and a second side portion from each of said tube bodies;
- and
- (a.1.2) forming has a holding member and a holding slot at said first side portion and said second side portion respectively, wherein when said first side portions and said second side portions of said tube bodies are coupled with each other, said holding members are engaged with said holding slots correspondingly so as to ensure said two tube bodies to be coupled with each other.
1 more element
67:
- The method, as recited in claim 63, wherein the step (a.1) further comprises the steps of:
- (a.1.1) radially extending a first side portion and a second side portion from each of said tube bodies;
- and
- (a.1.2) providing a binding layer to be sandwiched between said first side portions and said second side portions of said tube bodies when said tube bodies are coupled with each other.
1 more element
68:
- The method, as recited in claim 63, wherein the step (a.1) further comprises a step of configuring each of said tube bodies to have a first body and a second body that said first body is overlapped with said second body to cover said second body, wherein said curved outer-side surface is defined at said second body and said curved inner-side surface is defined at said first body.
69:
- The method, as recited in claim 68, wherein said first body is made of a mixture of long fiberglass and resin, and said second body is made of a mixture of short fiberglass and resin.