CN211083130U - Three-layer structure type cold-rolled precise seamless steel pipe - Google Patents
Three-layer structure type cold-rolled precise seamless steel pipe Download PDFInfo
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- CN211083130U CN211083130U CN201921762233.XU CN201921762233U CN211083130U CN 211083130 U CN211083130 U CN 211083130U CN 201921762233 U CN201921762233 U CN 201921762233U CN 211083130 U CN211083130 U CN 211083130U
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Abstract
The utility model relates to the technical field of seamless steel pipes, in particular to a three-layer structural cold rolling precision seamless steel pipe, which comprises a steel pipe body, wherein a plastic protective sleeve is sheathed outside the steel pipe body, a heat preservation layer is arranged between the protective sleeve and the steel pipe body and is coated on the outer peripheral surface of the steel pipe body, the left end of the steel pipe body is in threaded connection with a left flange, the right end of the steel pipe body is in threaded connection with a right flange, the right end surface of the left flange is attached to the left end surface of the protective sleeve, and the right end surface of the protective sleeve is attached to the left end surface of the right flange. The service life is prolonged, and the integral strength of the seamless steel pipe is effectively improved.
Description
Technical Field
The utility model belongs to the technical field of seamless steel pipe technique and specifically relates to a cold rolling accurate seamless steel pipe of three-layer structure formula.
Background
The cold-rolled precision seamless steel tube is a steel tube with high precision size, is prepared by a cold rolling process, and can be used for conveying water, coal gas, air, oil, heating steam, materials and the like; the high temperature material pipeline that uses among high temperature material processing equipment such as evaporimeter and reation kettle at present generally adopts seamless steel pipe to set up the heat preservation cotton outside the seamless steel pipe and keep warm to the high temperature material in the seamless steel pipe, however the heat preservation cotton of this kind of seamless steel outside of tubes cladding of carrying high temperature material is direct for exposing in the external world, is collided easily to taking place to damage, leads to the heat preservation effect not good, and the operating mode environment at high temperature material processing equipment place is generally comparatively abominable, also leads to the heat preservation cotton to take place to corrode the damage easily.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to solve the problems that in the prior art, the heat insulation cotton exposed outside of a seamless steel pipe for conveying high-temperature materials under bad working conditions is easy to collide and damage and corrode, a three-layer structural cold-rolled precise seamless steel pipe is provided.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a cold rolling accurate seamless steel pipe of three-layer structure formula, includes the steel pipe body, steel pipe body overcoat is equipped with the plastics protective sheath, be equipped with the heat preservation between protective sheath and the steel pipe body, the heat preservation cladding is on the outer peripheral face of steel pipe body, the left end threaded connection of steel pipe body has left flange, the right-hand member threaded connection of steel pipe body has right flange, the right-hand member face of left flange and the left end face laminating of protective sheath, the right-hand member face of protective sheath and the left end face laminating of right flange.
Connect on the steel pipe body through the mode with left flange and right flange with threaded connection in this scheme, can be convenient for establish the plastics protective sheath outside the steel pipe body to utilize the plastics protective sheath to protect the heat preservation cotton, make heat preservation and external isolated relatively, prevent that the heat preservation from being collided to damage or being corroded, thereby make the heat preservation can reliable and stable provide the heat preservation effect, improve life, and make the bulk strength of this seamless steel pipe effectively promote.
Furthermore, support rings are arranged at the left end part, the right end part and the middle part of the protective sleeve, the inner peripheral walls of all the support rings are in contact with the outer peripheral wall of the steel pipe body, a left connecting ring is arranged on the right end face of the left flange, and a right connecting ring is arranged on the left end face of the right flange;
the support ring at the left end of the protective sleeve is attached to the right end face of the left flange and is positioned in the left connecting ring, and the outer peripheral face of the left end of the protective sleeve is in contact with the inner peripheral wall of the left connecting ring;
the support ring at the right end of the protective sleeve is attached to the left end face of the right flange and is positioned in the right connecting ring, and the outer peripheral surface of the right end of the protective sleeve is in contact with the inner peripheral wall of the right connecting ring;
the strength of the protective sleeve can be improved by the arrangement of the support ring, and the protective sleeve is prevented from being easily deformed inwards after being collided; the cooperation of left go-between and protective sheath left end, and the cooperation of right go-between and protective sheath right-hand member can improve the joint strength between steel pipe body and left flange and the right flange, prevent the junction of steel pipe body and left flange, and the junction of steel pipe body and right flange breaks off, improves the radial bearing capacity of this seamless steel pipe.
Furthermore, a left connecting hole is formed in the right end face of the left flange, the left end of the steel pipe body is in threaded connection with the left connecting hole, a left sealing gasket is arranged between the end portion of the left end of the steel pipe body and the bottom of the left connecting hole, a right connecting hole is formed in the left end face of the right flange, and a right sealing gasket is arranged between the right end of the steel pipe body and the right connecting hole; thereby the left sealing gasket is pressed between the left end part of the steel pipe body and the left flange to form end face seal with larger sealing area and prevent leakage between the left flange and the steel pipe body; and the right sealing gasket is compressed between the right end part of the steel pipe body and the right flange to form end face seal with a large sealing area, so that leakage between the right flange and the steel pipe body is prevented.
Furthermore, the heat-insulating layer is made of heat-insulating cotton.
The utility model has the advantages that: the utility model discloses a cold-rolled accurate seamless steel pipe of three-layer structure formula is through connecting left flange and right flange on the steel pipe body with threaded connection's mode, can be convenient for establish the plastics protective sheath outside the steel pipe body, and utilize the plastics protective sheath to protect the heat preservation cotton, make heat preservation and external isolated relatively, prevent that the heat preservation from being collided to damaging or corroded, thereby make the heat preservation can reliable and stable provide the heat preservation effect, improve life, and make the bulk strength of this seamless steel pipe effectively promote.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic view of a three-layer structure cold-rolled precision seamless steel pipe of the present invention;
FIG. 2 is an enlarged partial schematic view of A of FIG. 1;
fig. 3 is a partially enlarged schematic view of B in fig. 1.
In the figure: 1. the steel pipe comprises a steel pipe body, 1-1 parts of a left flange, 1-11 parts of a left connecting ring, 1-12 parts of a left connecting hole, 1-2 parts of a right flange, 1-21 parts of a right connecting ring, 1-22 parts of a right connecting hole, 2 parts of a heat insulating layer, 3 parts of a protective sleeve, 3-1 parts of a supporting ring, 4 parts of a left sealing gasket, 5 parts of a right sealing gasket.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the invention only in a schematic way, and thus show only the components that are relevant to the invention, and the directions and references (e.g., upper, lower, left, right, etc.) may be used only to help describe the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
Example 1
As shown in fig. 1-3, a three-layer structural cold-rolled precision seamless steel tube comprises a steel tube body 1, a plastic protective sleeve 3 is sleeved outside the steel tube body 1, a heat insulation layer 2 is arranged between the protective sleeve 3 and the steel tube body 1, the heat insulation layer 2 is coated on the outer peripheral surface of the steel tube body 1, a left flange 1-1 is in threaded connection with the left end of the steel tube body 1, a right flange 1-2 is in threaded connection with the right end of the steel tube body 1, the right end face of the left flange 1-1 is attached to the left end face of the protective sleeve 3, and the right end face of the protective sleeve 3 is attached to the left end face of the right flange 1-.
The left end part, the right end part and the middle part of the protective sleeve 3 are respectively provided with a support ring 3-1, the inner peripheral wall of each support ring 3-1 is contacted with the outer peripheral wall of the steel pipe body 1, the right end face of the left flange 1-1 is provided with a left connecting ring 1-11, and the left end face of the right flange 1-2 is provided with a right connecting ring 1-21;
the support ring 3-1 at the left end of the protective sleeve 3 is attached to the right end face of the left flange 1-1 and is positioned in the left connecting ring 1-11, and the outer peripheral face of the left end of the protective sleeve 3 is in contact with the inner peripheral wall of the left connecting ring 1-11;
the support ring 3-1 at the right end of the protective sleeve 3 is attached to the left end face of the right flange 1-2 and is positioned in the right connecting ring 1-21, and the outer peripheral surface of the right end of the protective sleeve 3 is in contact with the inner peripheral wall of the right connecting ring 1-21;
the strength of the protective sleeve 3 can be improved by the arrangement of the support ring 3-1, and the protective sleeve 3 is prevented from being easily deformed inwards after being collided; the left end of the left connecting ring 1-11 is matched with the left end of the protective sleeve 3, and the right end of the right connecting ring 1-21 is matched with the right end of the protective sleeve 3, so that the connection strength between the steel pipe body 1 and the left flange 1-1 and the connection strength between the steel pipe body 1 and the left flange 1-2 can be improved, the connection part between the steel pipe body 1 and the left flange 1-1 and the connection part between the steel pipe body 1 and the right flange 1-2 are prevented from being broken, and the radial bearing capacity of the seamless steel pipe is improved.
The left flange is characterized in that a left connecting hole 1-12 is formed in the right end face of the left flange 1-1, the left end of the steel pipe body 1 is in threaded connection with the left connecting hole 1-12, a left sealing gasket 4 is arranged between the end part of the left end of the steel pipe body 1 and the hole bottom of the left connecting hole 1-12, a right connecting hole 1-22 is formed in the left end face of the right flange 1-2, and a right sealing gasket 5 is arranged between the right end of the steel pipe body 1 and the right connecting hole 1-22; so that the left sealing gasket 4 is pressed between the left end part of the steel pipe body 1 and the left flange 1-1 to form end face sealing with a large sealing area and prevent leakage between the left flange 1-1 and the steel pipe body 1; the right sealing gasket 5 is also compressed between the right end part of the steel pipe body 1 and the right flange 1-2 to form an end face seal with a large sealing area, so that leakage between the right flange 1-2 and the steel pipe body 1 is prevented.
The heat preservation layer 2 is made of heat preservation cotton.
Compared with the prior art the utility model discloses a cold-rolled accurate seamless steel pipe of three-layer structural formula, can pack the material into in the protective sheath 3 for the cotton heat preservation 2 of heat preservation in advance, then adorn protective sheath 3 on steel pipe body 1 together with heat preservation 2 again, it utilizes plastic protection cover 3 to protect the heat preservation cotton, make heat preservation 2 and external isolated relatively, prevent that heat preservation 2 from being collided to damaging or corroded, thereby make heat preservation 2 can reliable and stable provide the heat preservation effect, and service life is prolonged, and make the bulk strength of this seamless steel pipe effectively promote.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. A three-layer structural cold-rolled precise seamless steel pipe is characterized in that: the steel pipe heat-insulating protective sleeve comprises a steel pipe body (1), a plastic protective sleeve (3) is sleeved outside the steel pipe body (1), a heat-insulating layer (2) is arranged between the protective sleeve (3) and the steel pipe body (1), the heat-insulating layer (2) is coated on the outer peripheral surface of the steel pipe body (1), the left end of the steel pipe body (1) is in threaded connection with a left flange (1-1), the right end of the steel pipe body (1) is in threaded connection with a right flange (1-2), the right end face of the left flange (1-1) is attached to the left end face of the protective sleeve (3), and the right end face of the protective sleeve (3) is attached to the left end face of the right flange.
2. The cold-rolled precision seamless steel tube of three-layer structure according to claim 1, characterized in that: the left end part, the right end part and the middle part of the protective sleeve (3) are respectively provided with a support ring (3-1), the inner peripheral wall of each support ring (3-1) is contacted with the outer peripheral wall of the steel pipe body (1), the right end face of the left flange (1-1) is provided with a left connecting ring (1-11), and the left end face of the right flange (1-2) is provided with a right connecting ring (1-21);
the support ring (3-1) at the left end of the protective sleeve (3) is attached to the right end face of the left flange (1-1) and is positioned in the left connecting ring (1-11), and the outer peripheral face of the left end of the protective sleeve (3) is in contact with the inner peripheral wall of the left connecting ring (1-11);
the support ring (3-1) at the right end of the protective sleeve (3) is attached to the left end face of the right flange (1-2) and is located in the right connecting ring (1-21), and the outer peripheral face of the right end of the protective sleeve (3) is in contact with the inner peripheral wall of the right connecting ring (1-21).
3. The cold-rolled precision seamless steel tube of three-layer structure according to claim 1, characterized in that: the left connecting hole (1-12) has been seted up on the right end face of left flange (1-1), the left end and the left connecting hole (1-12) threaded connection of steel pipe body (1), and be equipped with left sealed pad (4) between the left end tip of steel pipe body (1) and the hole bottom of left connecting hole (1-12), right connecting hole (1-22) has been seted up on the left end face of right flange (1-2), be equipped with right sealed pad (5) between the right-hand member of steel pipe body (1) and right connecting hole (1-22).
4. The cold-rolled precision seamless steel tube of three-layer structure according to claim 1, characterized in that: the heat preservation layer (2) is made of heat preservation cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762233.XU CN211083130U (en) | 2019-10-19 | 2019-10-19 | Three-layer structure type cold-rolled precise seamless steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762233.XU CN211083130U (en) | 2019-10-19 | 2019-10-19 | Three-layer structure type cold-rolled precise seamless steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211083130U true CN211083130U (en) | 2020-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921762233.XU Active CN211083130U (en) | 2019-10-19 | 2019-10-19 | Three-layer structure type cold-rolled precise seamless steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211083130U (en) |
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2019
- 2019-10-19 CN CN201921762233.XU patent/CN211083130U/en active Active
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