CN110778817A - Rapid connecting structure and rapid connecting method of plastic-coated composite steel pipe - Google Patents
Rapid connecting structure and rapid connecting method of plastic-coated composite steel pipe Download PDFInfo
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- CN110778817A CN110778817A CN201911221409.5A CN201911221409A CN110778817A CN 110778817 A CN110778817 A CN 110778817A CN 201911221409 A CN201911221409 A CN 201911221409A CN 110778817 A CN110778817 A CN 110778817A
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- connecting pipe
- pipe
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- composite steel
- coated composite
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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
- F16L21/00—Joints with sleeve or socket
- F16L21/06—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends
- F16L21/065—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends tightened by tangentially-arranged threaded pins
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Sleeves (AREA)
Abstract
A quick connection structure of a plastic-coated composite steel pipe comprises: the pipe orifices at the two axial ends of the connecting pipe are expanded to form a flat-expanded straight opening, one ends of the two plastic-coated composite steel pipes are respectively inserted into the connecting pipe, and a sealing groove is formed between the two plastic-coated composite steel pipes and the connecting pipe; the two connecting components are sleeved at the two axial ends of the connecting pipe in a one-to-one correspondence manner, each connecting component comprises a half pipe, a sealing ring pressing ring and an O-shaped sealing ring, and the O-shaped sealing rings are arranged in the sealing grooves at the corresponding ends; at the two axial ends of the connecting pipe, the sealing ring pressing ring is movably sleeved on the plastic-coated composite steel pipe at the corresponding end, and one end of the sealing ring pressing ring, which is axially close to the connecting pipe, is inserted into the sealing groove and presses the O-shaped sealing ring against the step surface of the flat-expanded straight opening; the end face of one end of the sealing ring pressing ring, which is axially far away from the connecting pipe, forms an outer inclined plane with a high inner part and a low outer part. The invention can be used for the quick connection of the plastic-coated composite steel pipe and the quick first-aid repair of the problems of breakage, cracking, leakage and the like of the common steel pipe.
Description
Technical Field
The invention relates to the field of pipeline installation and connection, in particular to a quick connection structure and a quick connection method of a plastic-coated composite steel pipe.
Background
At present, in order to solve the problems of easy rust and easy corrosion of steel pipes, the steel pipes are mainly subjected to processes such as internal and external plastic coating and cladding in a factory, and the connection mode of the treated plastic-coated composite steel pipes mainly comprises the following steps: the method comprises the following steps of (1) adopting modes of threaded connection, flange connection, welding, flaring socket connection and the like, wherein the threaded connection is only suitable for small-diameter pipes; the flange connection is inconvenient for subsequent plastic coating and inconvenient for transportation and stacking because the flange plate is welded before plastic coating and the outer diameter of the flange plate is larger than that of the pipe body; in the welding connection, because manual operation is needed on site, the labor intensity is high, the quality stability is poor and the corrosion prevention of a welding opening is difficult to treat due to the influence of personnel skills, physical ability, weather environment and the like; flaring socket joint is because the flaring in the mill, and it is more to relate to the process, and the flaring back plastic-coated with and stack the transportation degree of difficulty and increase, the risk of turning over the rubber ring on the top occasionally when on-the-spot installation is inserted, and the leakproofness is influenced by tubular product out-of-roundness.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a quick connection structure and a quick connection method of a plastic-coated composite steel pipe, so as to avoid the defects.
The technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides a quick connect structure of plastic-coated composite steel pipe, it includes:
the pipe orifices at the two axial ends of the connecting pipe are expanded to form expanded straight openings, two planar circular flange plates are respectively formed at the two axial ends of the connecting pipe, one ends of the two plastic-coated composite steel pipes are respectively inserted into the connecting pipe, and a sealing groove is formed between the two plastic-coated composite steel pipes and the connecting pipe;
the two connecting components are sleeved at the two axial ends of the connecting pipe in a one-to-one correspondence manner, each connecting component comprises a half pipe, a sealing ring pressing ring and an O-shaped sealing ring, and the O-shaped sealing ring is arranged in a sealing groove at one corresponding end;
wherein, at the axial both ends of the connecting pipe, the seal ring clamping ring is movably sleeved on the plastic-coated composite steel pipe at the corresponding end, and one end of the seal ring clamping ring, which is close to the connecting pipe in the axial direction, is inserted into the seal groove and presses the O-shaped seal ring against the step surface of the flat-expanded straight opening; an outer inclined plane with a high inner part and a low outer part is formed on the end face of one end of the sealing ring pressing ring axially far away from the connecting pipe;
an inner inclined plane which is propped against the outer inclined plane is formed on the radial inner side of one end of the half pipe, which is axially close to the connecting pipe; the radial outer side of one end of the half pipe, which is axially close to the connecting pipe, extends axially towards one side of the connecting pipe and then extends convexly along the radial inner side to form a positioning step; the positioning step is pressed against the flange plate towards one side which is far away from the connecting pipe in the axial direction; and a radial locking gap is arranged between the positioning step and the connecting pipe.
Preferably, the half pipe is formed by closing and tightly holding two half units of a semicircular structure through locking bolts, the head parts of the half units are integrally connected with locking parts, and bolt holes are formed in the locking parts.
Preferably, the inclination angle of the outer slope is set to 45 °.
Preferably, the O-shaped sealing ring can be made of aging-resistant solid rubber, the Shore hardness of the O-shaped sealing ring is 55-60 degrees, the inner diameter of the O-shaped sealing ring is consistent with the outer diameter of the plastic-coated composite steel pipe, and the radial width of the O-shaped sealing ring is consistent with that of the sealing groove.
Preferably, the inner diameter of the connecting pipe is 2 mm larger than the outer diameter of the plastic-coated composite steel pipe.
Preferably, an axial thermal expansion and cold contraction distance is reserved between the two plastic-coated composite steel pipes.
The invention also provides a quick connection method of the plastic-coated composite steel pipe, which comprises the following steps:
respectively sleeving sealing ring pressing rings and O-shaped sealing rings at two ends of a connecting pipe at the corresponding two ends of two plastic-coated composite steel pipes to be connected;
inserting two plastic-coated composite steel pipes to be connected into the connecting pipe from two axial ends respectively, and reserving axial thermal expansion and cold contraction intervals;
respectively sliding the O-shaped sealing rings at the two ends of the connecting pipe into a sealing groove formed by surrounding the sealing ring pressing ring and the connecting pipe along the outer wall of the plastic-coated composite steel pipe;
inserting the sealing ring pressing ring into the sealing groove along the outer wall of the plastic-coated composite steel pipe to press the O-shaped sealing ring, and pressing the O-shaped sealing ring against the step surface of the flat-expanded straight opening;
pressing the positioning steps of one half pipe at two axial ends of the connecting pipe to one side away from the connecting pipe against a flange of the connecting pipe, and then closing and locking the half units of the half pipes by using locking bolts so as to enable the half pipes to be embraced on the connecting pipe and the plastic-coated composite steel pipe;
the pipe orifices at the two axial ends of the connecting pipe are expanded to form flat expanding straight orifices, the two axial ends of the connecting pipe respectively form two plane circular flange plates, one ends of the two plastic-coated composite steel pipes are respectively inserted into the connecting pipe, and a sealing groove is formed between the two plastic-coated composite steel pipes and the connecting pipe; an outer inclined plane with a high inner part and a low outer part is formed on the end face of one end of the sealing ring pressing ring axially far away from the connecting pipe; an inner inclined plane which is propped against the outer inclined plane is formed on the radial inner side of one end of the half pipe, which is axially close to the connecting pipe; the radial outer side of one end of the half pipe, which is axially close to the connecting pipe, extends axially towards one side of the connecting pipe and then protrudes inwards along the radial direction to form the positioning step; the positioning step is pressed against the flange plate towards one side which is far away from the connecting pipe in the axial direction; and a radial locking gap is arranged between the positioning step and the connecting pipe.
The quick connection structure and the quick connection method provided by the invention can be used for quick connection of the plastic-coated composite steel pipe, have low labor intensity and good sealing performance, and can also be used for quick first-aid repair of the problems of breakage, cracking, leakage and the like on the pipe fitting.
Drawings
FIG. 1 is a schematic structural view of a quick connect structure according to a preferred embodiment of the present invention;
FIG. 2 is an exploded view of the quick connect structure of a preferred embodiment of the present invention;
FIG. 3 is a side and cross-sectional view of a quick connect structure according to a preferred embodiment of the present invention;
FIG. 4 is an enlarged schematic view of a portion of FIG. 3;
Detailed Description
The technical scheme of the invention is clearly and completely described below with reference to the accompanying drawings; in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Please refer to fig. 1 to 4. In order to realize the quick connection of the two plastic-coated composite steel pipes 6, the quick connection structure comprises a connecting pipe 1 and two connecting components which are sleeved at the two axial ends of the connecting pipe 1 in a one-to-one correspondence manner. Each connecting component comprises a half pipe, a sealing ring pressing ring 4 and an O-shaped sealing ring 2. The half pipe is formed by two half units 5 with semicircular structures through involution and clasping by locking bolts (not shown). The head of the half unit 5 is integrally connected with a locking part 5c, and a bolt hole is arranged on the locking part 5 c.
The pipe openings at the two axial ends of the connecting pipe 1 are expanded (5-8 mm) to form an expanded straight opening 1 a. Two plane circular flange plates 1b are respectively formed at two axial ends of the connecting pipe 1. One ends of the two plastic-coated composite steel pipes 6 are respectively inserted into the connecting pipes 1, and a sealing groove is formed between the connecting pipes 1. The O-shaped sealing ring 2 is arranged in the sealing groove at the corresponding end.
The sealing ring can be made of aging-resistant solid rubber, the Shore hardness of the sealing ring is 55-60 degrees, the inner diameter size of the sealing ring is consistent with the outer diameter of the plastic-coated composite steel pipe, and the radial width of the sealing ring is consistent with that of the sealing groove.
At the two axial ends of the connecting pipe 1, the sealing ring pressing rings 4 are movably sleeved on the plastic-coated composite steel pipe 6 at the corresponding end, and one end of the sealing ring pressing ring axially close to the connecting pipe 1 is inserted into the sealing groove and presses the O-shaped sealing ring 2 against the step surface of the flat-expanded straight opening; an outer inclined plane 4a with a high inner part and a low outer part is formed on the end face of one end of the sealing ring pressing ring 4 which is axially far away from the connecting pipe 1. The inclination angle of the outer slope 4a may be set to 45 °.
An inner inclined surface 5a abutting against the outer inclined surface 4a is formed on the radial inner side of one end of the half pipe close to the connecting pipe 1 in the axial direction. The radial outer side of one end of the half pipe close to the connecting pipe 1 in the axial direction extends towards one side of the connecting pipe 1 in the axial direction and then protrudes inwards in the radial direction to form a positioning step 5 b. The positioning step 5b is pressed against the flange 1b towards the side axially away from the connecting pipe 1. A radial locking clearance is arranged between the positioning step 5b and the connecting pipe 1.
The inner diameter of the connecting pipe is slightly larger (for example, 2 mm) than the outer diameter of the corresponding plastic-coated composite steel pipe, so that the plastic-coated composite steel pipe can be conveniently inserted into or sleeved into the plastic-coated composite steel pipe. In addition, because the plastic-coated composite steel pipe has expansion with heat and contraction with cold quantity in the length direction, the length between two flanges of the plastic-coated composite steel pipe can be set to be 2 times of the diameter of the plastic-coated composite steel pipe so as to ensure the free expansion and contraction quantity of the plastic-coated composite steel pipe and further avoid the plastic-coated composite steel pipe from being separated or arched in the using process.
According to the invention, the two half units are tightly held by the locking bolt, and simultaneously, the sealing ring pressing ring can axially press the tightly-closed O-shaped sealing ring on the connecting pipe through the acting force of the inner inclined surface to the inner inclined surface, so that the sealing effect is achieved by utilizing the elastic deformation of the sealing ring.
When the quick connecting structure is used for specifically connecting two plastic-coated composite steel pipes 1, the operation steps are as follows:
respectively sleeving sealing ring compression rings 4 and O-shaped sealing rings 2 at two ends of a connecting pipe 1 at two corresponding ends of two plastic-coated composite steel pipes 6 to be connected;
inserting two plastic-coated composite steel pipes 6 to be connected into the connecting pipe 1 from two axial ends respectively, and reserving axial thermal expansion and cold contraction intervals;
respectively sliding the O-shaped sealing rings 2 at two ends of the pipe fitting into a sealing groove formed by surrounding a sealing ring pressing ring 4 and a connecting pipe 1 along the outer wall of the plastic-coated composite steel pipe;
inserting the sealing ring pressing ring 4 into the sealing groove along the outer wall of the plastic-coated composite steel pipe 6 to press the O-shaped sealing ring 2;
the positioning steps 5b of the half pipes at the two axial ends of the connecting pipe 1 are pressed against the flange plate 1b of the connecting pipe 1 towards one side away from the connecting pipe 1, and then the half units 5 of the half pipes are closed and locked by locking bolts so that the half pipes are clasped on the connecting pipe 1 and the plastic-coated composite steel pipe 6.
In the locking process, the inner inclined surface 5a of the half pipe is attached to and pressed against the outer inclined surface of the sealing ring pressing ring 4, so that the sealing ring pressing ring 4 axially moves to press the O-shaped sealing ring 2 to form sealing. Meanwhile, the radial locking clearance between the half pipe and the connecting pipe is eliminated, so that the two ends of the plastic-coated composite steel pipe are tightly held, the plastic-coated composite steel pipe is connected into a whole, the connection is finished, and meanwhile, the surface anticorrosive coating of the pipe is not damaged. And so on, thereby realizing the connection among a plurality of plastic-coated composite steel pipes.
According to the principle and the method, the invention can also be used for the rapid rush repair of the problems of breakage, cracking, leakage and the like of the common steel pipe. For example, when a damaged steel pipe is subjected to rapid repair, one end of the damaged steel pipe is broken and then inserted into a connecting pipe as two plastic-coated composite steel pipes to be subjected to the above treatment, so that the damaged part can be rapidly and effectively sealed.
Other parts of the invention not described in detail are prior art and are not described in detail herein.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a quick connect structure of plastic-coated composite steel pipe which characterized in that includes:
the pipe orifices at the two axial ends of the connecting pipe are expanded to form expanded straight openings, two planar circular flange plates are respectively formed at the two axial ends of the connecting pipe, one ends of the two plastic-coated composite steel pipes are respectively inserted into the connecting pipe, and a sealing groove is formed between the two plastic-coated composite steel pipes and the connecting pipe;
the two connecting components are sleeved at the two axial ends of the connecting pipe in a one-to-one correspondence manner, each connecting component comprises a half pipe, a sealing ring pressing ring and an O-shaped sealing ring, and the O-shaped sealing ring is arranged in a sealing groove at one corresponding end;
wherein, at the axial both ends of the connecting pipe, the seal ring clamping ring is movably sleeved on the plastic-coated composite steel pipe at the corresponding end, and one end of the seal ring clamping ring, which is close to the connecting pipe in the axial direction, is inserted into the seal groove and presses the O-shaped seal ring against the step surface of the flat-expanded straight opening; an outer inclined plane with a high inner part and a low outer part is formed on the end face of one end of the sealing ring pressing ring axially far away from the connecting pipe;
an inner inclined plane which is propped against the outer inclined plane is formed on the radial inner side of one end of the half pipe, which is axially close to the connecting pipe; the radial outer side of one end of the half pipe, which is axially close to the connecting pipe, extends axially towards one side of the connecting pipe and then extends convexly along the radial inner side to form a positioning step; the positioning step is pressed against the flange plate towards one side which is far away from the connecting pipe in the axial direction; and a radial locking gap is arranged between the positioning step and the connecting pipe.
2. The quick connection structure of the plastic-coated composite steel pipe as claimed in claim 1, wherein the half pipe is formed by two half units of a semicircular structure which are closed and clasped by locking bolts, the head parts of the half units are integrally connected with locking parts, and the locking parts are provided with bolt holes.
3. The quick coupling structure of a plastic-coated composite steel pipe as claimed in claim 1, wherein the inclination angle of the outer slope is set to 45 °.
4. The rapid connection structure of a plastic-coated composite steel pipe as claimed in claim 1, wherein the O-shaped sealing ring is made of aging-resistant solid rubber, the Shore hardness of the O-shaped sealing ring is 55-60 degrees, the inner diameter of the O-shaped sealing ring is consistent with the outer diameter of the plastic-coated composite steel pipe, and the radial width of the O-shaped sealing ring is consistent with the sealing groove.
5. The rapid connection structure of a plastic-coated composite steel pipe as claimed in claim 1, wherein the inner diameter of the connection pipe is 2 mm larger than the outer diameter of the plastic-coated composite steel pipe.
6. The rapid connection structure of the plastic-coated composite steel pipe as claimed in claim 1, wherein an axial thermal expansion and contraction space is reserved between the two plastic-coated composite steel pipes.
7. A quick connection method of plastic-coated composite steel pipes is characterized by comprising the following steps:
respectively sleeving sealing ring pressing rings and O-shaped sealing rings at two ends of a connecting pipe at the corresponding two ends of two plastic-coated composite steel pipes to be connected;
inserting two plastic-coated composite steel pipes to be connected into the connecting pipe from two axial ends respectively, and reserving axial thermal expansion and cold contraction intervals;
respectively sliding the O-shaped sealing rings at the two ends of the connecting pipe into a sealing groove formed by surrounding the sealing ring pressing ring and the connecting pipe along the outer wall of the plastic-coated composite steel pipe;
inserting the sealing ring pressing ring into the sealing groove along the outer wall of the plastic-coated composite steel pipe to press the O-shaped sealing ring, and pressing the O-shaped sealing ring against the step surface of the flat-expanded straight opening;
pressing the positioning steps of one half pipe at two axial ends of the connecting pipe to one side away from the connecting pipe against a flange of the connecting pipe, and then closing and locking the half units of the half pipes by using locking bolts so as to enable the half pipes to be embraced on the connecting pipe and the plastic-coated composite steel pipe;
the pipe orifices at the two axial ends of the connecting pipe are expanded to form flat expanding straight orifices, the two axial ends of the connecting pipe respectively form two plane circular flange plates, one ends of the two plastic-coated composite steel pipes are respectively inserted into the connecting pipe, and a sealing groove is formed between the two plastic-coated composite steel pipes and the connecting pipe; an outer inclined plane with a high inner part and a low outer part is formed on the end face of one end of the sealing ring pressing ring axially far away from the connecting pipe; an inner inclined plane which is propped against the outer inclined plane is formed on the radial inner side of one end of the half pipe, which is axially close to the connecting pipe; the radial outer side of one end of the half pipe, which is axially close to the connecting pipe, extends axially towards one side of the connecting pipe and then protrudes inwards along the radial direction to form the positioning step; the positioning step is pressed against the flange plate towards one side which is far away from the connecting pipe in the axial direction; and a radial locking gap is arranged between the positioning step and the connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911221409.5A CN110778817A (en) | 2019-12-03 | 2019-12-03 | Rapid connecting structure and rapid connecting method of plastic-coated composite steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911221409.5A CN110778817A (en) | 2019-12-03 | 2019-12-03 | Rapid connecting structure and rapid connecting method of plastic-coated composite steel pipe |
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| Publication Number | Publication Date |
|---|---|
| CN110778817A true CN110778817A (en) | 2020-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911221409.5A Pending CN110778817A (en) | 2019-12-03 | 2019-12-03 | Rapid connecting structure and rapid connecting method of plastic-coated composite steel pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154138A (en) * | 2021-04-30 | 2021-07-23 | 上海奉贤钢管厂有限公司 | Precise seamless steel pipe for injection molding machine and production process thereof |
-
2019
- 2019-12-03 CN CN201911221409.5A patent/CN110778817A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154138A (en) * | 2021-04-30 | 2021-07-23 | 上海奉贤钢管厂有限公司 | Precise seamless steel pipe for injection molding machine and production process thereof |
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