CN216344439U - Steel-plastic conversion pipe fitting with reinforced sealing structure - Google Patents
Steel-plastic conversion pipe fitting with reinforced sealing structure Download PDFInfo
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- CN216344439U CN216344439U CN202122703359.3U CN202122703359U CN216344439U CN 216344439 U CN216344439 U CN 216344439U CN 202122703359 U CN202122703359 U CN 202122703359U CN 216344439 U CN216344439 U CN 216344439U
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Abstract
The utility model discloses a steel-plastic conversion pipe fitting with a reinforced sealing structure, which relates to the technical field of steel-plastic pipe transitional connection pipe fittings and comprises a plastic pipe section, a steel pipe section and a locking sleeve, wherein the plastic pipe section is divided into a small-diameter section, a different-diameter section and a large-diameter section according to the outer diameter, the steel pipe section is divided into a plastic pipe combining section and a smooth section, a limiting retaining ring is coaxially arranged on the outer wall of the steel pipe section, the plastic pipe combining section extends into the large-diameter section of the plastic pipe section, the locking sleeve is sleeved on the plastic pipe section, the locking sleeve is divided into an equal-diameter section and a necking section, and the locking sleeve for preventing the locking sleeve from being separated is arranged on the outer side of the locking sleeve. The utility model provides a steel-plastic conversion pipe fitting which can prevent a locking sleeve from falling off and strengthen a sealing structure, and aims to solve the problem that the locking sleeve in the existing steel-plastic conversion pipe fitting has no anti-separation structure and has leakage risk caused by falling off.
Description
Technical Field
The utility model relates to the technical field of steel-plastic pipe transitional connection pipe fittings, in particular to a steel-plastic conversion pipe fitting for reinforcing a sealing structure.
Background
With the vigorous development of gas industry, buried polyethylene pipelines are widely used in town gas transmission pipe networks, and when the buried polyethylene gas pipelines enter a residential district and enter a user or enter the user and leave the ground for use, metal pipes are generally used for conveying. Therefore, the connection reliability of the underground PE pipe and the overground steel pipe is particularly critical, the underground PE pipe and the overground steel pipe are one of the hidden dangers of gas leakage and explosion, and the underground PE pipe and the overground steel pipe are used as steel-plastic transition conversion pipe fittings, and the integral sealing performance of steel-plastic combination parts of the underground PE pipe and the overground steel pipe is very important. Therefore, the development of a steel-plastic conversion pipe fitting for reinforcing a sealing structure in the field and ensuring the integral sealing performance of steel-plastic pipe connection becomes urgent priority in the industry.
SUMMERY OF THE UTILITY MODEL
The utility model provides a steel-plastic conversion pipe fitting which can prevent a locking sleeve from falling off and strengthen a sealing structure, and aims to solve the problem that the locking sleeve in the existing steel-plastic conversion pipe fitting has no anti-separation structure and has leakage risk caused by falling off.
In order to achieve the purpose, the utility model adopts the following technical scheme: a steel-plastic conversion pipe fitting for strengthening a sealing structure comprises a plastic pipe section, a steel pipe section and a locking sleeve,
the plastic pipe section is divided into a small-diameter section, a different-diameter section and a large-diameter section according to the outer diameter size, the axial section of the different-diameter section is trapezoidal, the different-diameter section is positioned between the small-diameter section and the large-diameter section, the small-opening end of the different-diameter section is in butt joint with one end of the small-diameter section, the outer diameter of the small-opening end of the different-diameter section is the same as that of the small-diameter section, the large-opening end of the different-diameter section is in butt joint with one end of the large-diameter section, and the outer diameter of the large-opening end of the different-diameter section is the same as that of the large-diameter section;
the steel pipe section is divided into a plastic pipe combining section and a smooth section, a limiting baffle ring is coaxially arranged on the outer wall of the steel pipe section, and the limiting baffle ring is positioned at the junction of the plastic pipe combining section and the smooth section; the plastic pipe joint section extends into the large-diameter section of the plastic pipe section, and a plurality of annular barbs for preventing the plastic pipe section from separating are arranged on the outer wall of the plastic pipe joint section; one end of the large-diameter section opening is abutted against the side wall of the limit baffle ring;
the locking sleeve is sleeved on the plastic pipe section and is divided into an equal-diameter section and a necking section, a large opening end of the necking section is in butt joint with one end of the equal-diameter section, the inner side of the equal-diameter section corresponds to the large-diameter section of the plastic pipe combining section, the equal-diameter section and the large-diameter section are in interference fit, the inner side of the necking section corresponds to the reducing section of the plastic pipe combining section, and the inner wall of the necking section is attached to the outer wall of the reducing section;
the outer side of the locking sleeve is provided with a locking sleeve for preventing the locking sleeve from being separated, an outer convex ring is coaxially arranged on the outer side wall of one side, far away from the necking section, of the locking sleeve, an inner convex ring is coaxially arranged on the inner side wall of one side of the locking sleeve, the inner side wall of the other side of the locking sleeve is fixed with the outer side wall of the limiting blocking ring through a threaded structure, and the outer convex ring is clamped between the inner convex ring and the limiting blocking ring.
Preferably, a plurality of O-shaped sealing rings are arranged between the large-diameter section and the plastic pipe joint section.
Preferably, the outer wall of the plastic pipe joint section is provided with a plurality of sealing ring grooves in a ring mode, an O-shaped sealing ring is arranged in each sealing ring groove, the O-shaped sealing ring is in sealing fit with the corresponding sealing ring groove, and the O-shaped sealing ring is also in sealing fit with the large-diameter section.
Preferably, the inner diameter of the inner convex ring is larger than the outer diameter of the equal-diameter section and smaller than the outer diameter of the outer convex ring.
Preferably, the outer side wall of the limit stop ring is provided with an external thread, and the inner side wall of the locking sleeve is provided with an internal thread matched with the external thread on the limit stop ring.
Therefore, the utility model has the following beneficial effects: 1. the locking sleeve for preventing the locking sleeve from being separated is arranged on the outer side of the locking sleeve, so that the locking sleeve cannot fall off, and the sealing property between the plastic pipe section and the steel pipe section is guaranteed; 2. an O-shaped sealing ring is arranged between the large-diameter section of the plastic pipe section and the plastic pipe joint section of the steel pipe section, so that the sealing property is enhanced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic view of the construction of the plastic tubing section of the present invention.
FIG. 3 is a schematic view of the structure of a steel pipe segment according to the present invention.
Fig. 4 is a schematic structural view of the locking sleeve of the present invention.
Figure 5 is a schematic view of the locking sleeve of the present invention.
1: a plastic pipe section; 101: a small diameter section; 102: a diameter-varying section; 103: a large diameter section; 2: a steel pipe section; 201: a plastic pipe joint section; 202: a smooth section; 203: a limit stop ring; 204: a ring-shaped barb; 205: an O-shaped sealing ring; 3: a locking sleeve; 301: a constant diameter section; 302: a necking section; 303: an outer convex ring; 4: a locking sleeve; 401: an inner collar.
Detailed Description
The utility model is further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 5, the steel-plastic conversion pipe fitting for reinforcing the sealing structure comprises a plastic pipe section 1, a steel pipe section 2 and a locking sleeve 3.
The plastic pipe section 1 is divided into a small diameter section 101, a different diameter section 102 and a large diameter section 103 according to the outer diameter, as shown in fig. 2, the shaft section of the different diameter section 102 is trapezoidal, the different diameter section 102 is located between the small diameter section 101 and the large diameter section 103, the small end of the different diameter section 102 is in butt joint with one end of the small diameter section 101, the outer diameter of the small end of the different diameter section 102 is the same as the outer diameter of the small diameter section 101, the large end of the different diameter section 102 is in butt joint with one end of the large diameter section 103, and the outer diameter of the large end of the different diameter section 102 is the same as the outer diameter of the large diameter section 103.
The steel pipe section 2 is divided into a plastic pipe joint section 201 and a smooth section 202, as shown in fig. 3, a limit baffle ring 203 is coaxially arranged on the outer wall of the steel pipe section 2, and the limit baffle ring 203 is located at the junction of the plastic pipe joint section 201 and the smooth section 202; the plastic pipe combining section 201 extends into the large-diameter section 103 of the plastic pipe section 1, the plastic pipe combining section 201 is in interference fit with the large-diameter section 103, and a plurality of annular barbs 204 for preventing the plastic pipe section 1 from disengaging are arranged on the outer wall of the plastic pipe combining section 201; the open end of the large-diameter section 103 abuts against the side wall of the limit stop ring 203. Be equipped with a plurality of O type sealing washer 205 between major diameter section 103 and the plastic pipe joint section 201, concrete structure is: the outer wall of the plastic pipe combining section 201 is annularly provided with a plurality of sealing ring grooves, an O-shaped sealing ring 205 is arranged in each sealing ring groove, the O-shaped sealing ring 205 is in sealing fit with the corresponding sealing ring groove, and the O-shaped sealing ring 205 is also in sealing fit with the large-diameter section 103. The O-ring 205 enhances the sealing between the plastic pipe joint section 201 and the large diameter section 103.
The locking sleeve 3 is sleeved on the plastic pipe section 1, the locking sleeve 3 is divided into an equal-diameter section 301 and a reduced-diameter section 302, as shown in fig. 4, a large-opening end of the reduced-diameter section 302 is butted with one end of the equal-diameter section 301, the inner side of the equal-diameter section 301 corresponds to the large-diameter section 103 of the plastic pipe combining section 201, the equal-diameter section 301 is in interference fit with the large-diameter section 103, and the inner side of the reduced-diameter section 302 corresponds to the reducing section 102 of the plastic pipe combining section 201, and the inner wall of the reduced-diameter section 302 is attached to the outer wall of the reducing section 102.
The outside of lock sleeve 3 is equipped with a locking sleeve 4 that is used for preventing that lock sleeve 3 from breaking away from, as shown in fig. 5, the coaxial outer bulge loop 303 that is equipped with on the lateral wall of one side of keeping away from the necking down section 302 on the lock sleeve 3, the coaxial inner bulge loop 401 that is equipped with on the inside wall of one side of locking sleeve 4, it is fixed through helicitic texture between the lateral wall of opposite side inside wall and spacing fender ring 203, is equipped with the external screw thread on the lateral wall of spacing fender ring 203, is equipped with the internal thread that matches with the external screw thread on the spacing fender ring 203 on the inside wall of locking sleeve 4. The outer convex ring 303 is clamped between the inner convex ring 401 and the limiting baffle ring 203, and the inner diameter of the inner convex ring 401 is larger than the outer diameter of the equal-diameter section 301 and smaller than the outer diameter of the outer convex ring 303.
The neck ring 3 one end is spacing through the throat section 302 of self, and the other end is fixed through the joint of locking collar 4 and spacing fender ring 203, has effectively prevented in the use that locking collar 3 can break away from the leakage that causes steel to mould conversion pipe fitting.
Claims (5)
1. The utility model provides a strengthen seal structure's steel and plastic conversion pipe fitting, includes mould pipeline section (1), steel pipe section (2) and lock sleeve (3), its characterized in that:
the plastic pipe section (1) is divided into a small-diameter section (101), a different-diameter section (102) and a large-diameter section (103) according to the outer diameter, the axial section of the different-diameter section (102) is trapezoidal, the different-diameter section (102) is located between the small-diameter section (101) and the large-diameter section (103), the small-opening end of the different-diameter section (102) is in butt joint with one end of the small-diameter section (101), the outer diameter of the small-opening end of the different-diameter section (102) is the same as that of the small-diameter section (101), the large-opening end of the different-diameter section (102) is in butt joint with one end of the large-diameter section (103), and the outer diameter of the large-opening end of the different-diameter section (102) is the same as that of the large-diameter section (103);
the steel pipe section (2) is divided into a plastic pipe combining section (201) and a smooth section (202), a limiting baffle ring (203) is coaxially arranged on the outer wall of the steel pipe section (2), and the limiting baffle ring (203) is positioned at the junction of the plastic pipe combining section (201) and the smooth section (202); the plastic pipe combining section (201) extends into the large-diameter section (103) of the plastic pipe section (1), and a plurality of annular barbs (204) for preventing the plastic pipe section (1) from separating are arranged on the outer wall of the plastic pipe combining section (201); one open end of the large-diameter section (103) is abutted against the side wall of the limit baffle ring (203);
the plastic pipe joint is characterized in that the locking sleeve (3) is sleeved on the plastic pipe section (1), the locking sleeve (3) is divided into an equal-diameter section (301) and a reduced-diameter section (302), a large-opening end of the reduced-diameter section (302) is in butt joint with one end of the equal-diameter section (301), the inner side of the equal-diameter section (301) corresponds to the large-diameter section (103) of the plastic pipe joint section (201), the equal-diameter section (301) and the large-diameter section (103) are in interference fit, the inner side of the reduced-diameter section (302) corresponds to the reduced-diameter section (102) of the plastic pipe joint section (201), and the inner wall of the reduced-diameter section (302) is attached to the outer wall of the reduced-diameter section (102);
the outer side of the locking sleeve (3) is provided with a locking sleeve (4) used for preventing the locking sleeve (3) from being separated, an outer convex ring (303) is coaxially arranged on the outer side wall of one side of the locking sleeve (3) far away from the necking section (302), an inner convex ring (401) is coaxially arranged on the inner side wall of one side of the locking sleeve (4), the inner side wall of the other side is fixed with the outer side wall of the limit stop ring (203) through a thread structure, and the outer convex ring (303) is clamped between the inner convex ring (401) and the limit stop ring (203).
2. The steel-plastic conversion pipe fitting for reinforcing a sealing structure according to claim 1, characterized in that: a plurality of O-shaped sealing rings (205) are arranged between the large-diameter section (103) and the plastic pipe joint section (201).
3. The steel-plastic conversion pipe fitting for reinforcing a sealing structure according to claim 2, characterized in that: the outer wall of the plastic pipe combining section (201) is annularly provided with a plurality of sealing ring grooves, an O-shaped sealing ring (205) is arranged in each sealing ring groove, the O-shaped sealing ring (205) is in sealing fit with the corresponding sealing ring groove, and the O-shaped sealing ring (205) is also in sealing fit with the large-diameter section (103).
4. The steel-plastic conversion pipe fitting for reinforcing a sealing structure according to claim 1, characterized in that: the inner diameter of the inner convex ring (401) is larger than the outer diameter of the equal-diameter section (301) and smaller than the outer diameter of the outer convex ring (303).
5. The steel-plastic conversion pipe fitting for reinforcing a sealing structure according to claim 1, characterized in that: the outer side wall of the limiting blocking ring (203) is provided with an external thread, and the inner side wall of the locking sleeve (4) is provided with an internal thread matched with the external thread on the limiting blocking ring (203).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122703359.3U CN216344439U (en) | 2021-11-03 | 2021-11-03 | Steel-plastic conversion pipe fitting with reinforced sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122703359.3U CN216344439U (en) | 2021-11-03 | 2021-11-03 | Steel-plastic conversion pipe fitting with reinforced sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216344439U true CN216344439U (en) | 2022-04-19 |
Family
ID=81134263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122703359.3U Active CN216344439U (en) | 2021-11-03 | 2021-11-03 | Steel-plastic conversion pipe fitting with reinforced sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216344439U (en) |
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2021
- 2021-11-03 CN CN202122703359.3U patent/CN216344439U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 315414 No. 71, West Road, Hemudu Town, Yuyao City, Ningbo City, Zhejiang Province Patentee after: Ningbo Yuhua Industrial Co.,Ltd. Address before: 315414 No. 71, West Road, Hemudu Town, Yuyao City, Ningbo City, Zhejiang Province Patentee before: NINGBO YUHUA ELECTRIC APPLIANCE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |