CN-224229492-U - Flange type steel-plastic adapter

Abstract

The utility model belongs to the technical field of pipeline connectors, and particularly relates to a flange type steel-plastic adapter, which comprises a metal end flange, a plastic end flange, an annular elastic rubber sealing ring, a plurality of groups of stud bolts, and a split type groove clamp, wherein the split type groove clamp comprises two semi-annular clamps which are spliced in a butt joint way, the inner side wall of each semi-annular clamp is provided with a limiting clamping groove and a clamping convex rib, the upper end face of the metal end flange is integrally provided with an annular limiting convex ring which protrudes upwards, the annular limiting convex ring is embedded in the limiting clamping groove, the end part of a metal steel pipe is provided with a clamping groove, and the clamping convex rib is embedded in the clamping groove. The device can solve the problem that the fire construction is limited when the flange plate of the steel manufacturing method is connected with the metal steel pipe, and improves the water hammer impact resistance, construction convenience and use stability of the adapter.

Inventors

• BI FANGBO
• Zong Xiaowei

Assignees

• 山东众友安全技术有限公司

Dates

Publication Date

20260512

Application Date

20260416

Claims (10)

1. 1. The flange type steel-plastic adapter comprises a metal end flange (2) connected with a metal steel pipe (1), a plastic end flange (4) connected with a polyethylene pipe (3), an annular elastic rubber sealing ring and a plurality of groups of stud bolts (5), and is characterized by further comprising split groove hoops, wherein each split groove hoop comprises two semi-annular hoops (6) which are spliced in an opposite mode, each semi-annular hoop (6) is provided with a limiting clamping groove (7) and a clamping convex rib (8), after the two semi-annular hoops (6) are spliced, the two groups of limiting clamping grooves (7) are spliced to form a limiting clamping groove (7) in a whole circular shape, the two groups of clamping convex ribs (8) are spliced to form a clamping convex rib (8) in a whole circular shape, the annular limiting convex ring (9) is integrally arranged at the upper end of the metal end flange (2), the annular limiting convex ring (9) is embedded in the limiting clamping groove (7), the end of the metal steel pipe (1) is provided with a clamping groove (10), the clamping convex rib (8) is embedded in the limiting groove (10), and the clamping convex rib (8) is spliced between the metal end (2) and the plastic end (4) and the plastic end flange (2) is coaxially arranged.
2. 2. The flanged steel-plastic adapter according to claim 1, characterized in that the side face of the metal end flange (2) facing the plastic end flange (4) is arranged in opposite parallel with the side face of the plastic end flange (4) facing the metal end flange (2).
3. 3. The flange type steel-plastic adapter according to claim 1, wherein the metal end flange plate (2) and the plastic end flange plate (4) are respectively provided with coaxial corresponding mounting through holes, two ends of the stud bolts (5) are respectively penetrated in the corresponding coaxial mounting through holes, and two ends of the stud bolts (5) are respectively connected with locking nuts in a threaded manner.
4. 4. A flanged steel-plastic adapter according to claim 1, characterized in that the studs (5) are evenly distributed along the circumference of the metal end flange (2).
5. 5. A flanged steel-plastic adapter according to claim 4, characterized in that the number of studs (5) is 6-12.
6. 6. The flanged steel-plastic adapter according to claim 1, characterized in that the plastic end flange (4) is integrally formed with the polyethylene pipe (3).
7. 7. The flange type steel-plastic adapter according to claim 1, wherein the split groove clamp is formed by splicing two symmetrical semi-annular clamps (6), the splicing ends of the two semi-annular clamps (6) are provided with connecting lugs, and adjacent connecting lugs are locked and fixed through locking bolts.
8. 8. The flange type steel-plastic adapter according to claim 1, wherein the inner side wall of the semi-annular clamp (6), the inner wall of the limiting clamping groove (7) and the surface of the clamping convex rib (8) are all provided with anti-corrosion galvanized layers.
9. 9. The flange type steel-plastic adapter according to claim 1, wherein an annular sealing gasket which is mutually matched is clamped between the clamping groove (10) of the metal steel pipe (1) and the clamping convex rib (8) of the split groove clamp, and the annular sealing gasket is attached between the groove wall of the clamping groove (10) and the outer wall of the clamping convex rib (8).
10. 10. The flange type steel-plastic adapter according to claim 9, wherein an annular sealing piece matched with each other is clamped between the annular limiting convex ring (9) of the metal end flange plate (2) and the limiting clamping groove (7) of the split groove clamp, and the annular sealing gasket and the annular sealing piece are of an integral sealing structure formed integrally.

Description

Flange type steel-plastic adapter Technical Field The utility model belongs to the technical field of pipeline connectors, and particularly relates to a flange type steel-plastic adapter. Background The steel-plastic adapter is a key matched pipe fitting for realizing the connection of the metal steel pipe and the plastic pipeline, the rigidity of a connecting structure, the safety of construction operation and the long-term reliability of a sealing surface of the steel-plastic adapter directly determine the running stability and the service life of a steel-plastic mixed pipeline system, and the steel-plastic adapter is an indispensable core component in the steel-plastic pipeline system. The existing flange type steel-plastic adapter has two technical pain points, namely firstly, a flange plate for a steel manufacturing method is connected with a metal steel pipe in a welding or integral casting mode, welding operation needs to be started, a fire forbidden operation scene cannot be adapted, buckling deformation of a flange sealing surface is easily caused, corrosion leakage is easily caused after long-term use, and secondly, a radial sealing ring is mainly used for sealing a metal end and a plastic end. Chinese patent CN219933260U discloses a grooved flange adapter, including ring flange and joint section of thick bamboo, the ring flange top has linked firmly the joint section of thick bamboo, has seted up a plurality of bolt holes on the ring flange, and the round slot has been seted up to joint section of thick bamboo surface, and ring flange bottom surface edge has linked firmly the round retainer plate, and the ring flange bottom surface has still linked firmly two rings of first archs. The gasket can be positioned preliminarily, so that the gasket is aligned with the flange, the gasket only needs to be rotated to align the bolt holes later, the trouble of alignment adjustment is reduced, the first bulge is abutted with the gasket and is mutually meshed with the second bulge on the gasket, the second bulge is simultaneously abutted with the bottom surface of the flange, four seals are formed, and the sealing performance between the gasket and the flange is effectively improved. However, the flange plate and the joint barrel are integrally cast and formed, so that the structural risk of long-term leakage exists, meanwhile, the overall rigidity of the cast structure is far lower than that of a mechanically meshed rigid connection structure, the impact resistance of a water hammer is weak, and the cast structure cannot be suitable for working conditions with high structural rigidity requirements such as high-pressure fire fighting and water supply. Disclosure of utility model The utility model aims to provide a flange type steel-plastic adapter, which can solve the problems of limited fire construction, structural leakage and insufficient rigidity when a flange plate is connected with a metal steel pipe in a steel manufacturing method, improve the water hammer impact resistance of the adapter, and improve the construction convenience and the use stability. In order to achieve the above purpose, the technical scheme of the utility model is as follows: The flange type steel-plastic adapter comprises a metal end flange connected with a metal steel pipe, a plastic end flange connected with a polyethylene pipe, an annular elastic rubber sealing ring, a plurality of groups of stud bolts, and a split groove clamp, wherein the split groove clamp comprises two semi-annular clamps which are spliced in a butt-joint mode, a limiting clamping groove and a clamping convex rib are formed in the inner side wall of each semi-annular clamp, after the two semi-annular clamps are spliced, the two groups of limiting clamping grooves are spliced to form a whole annular limiting clamping groove, the two groups of clamping convex ribs are spliced to form a whole annular clamping convex rib, the upper end of the metal end flange is integrally provided with an annular limiting convex ring which protrudes outwards, the annular limiting convex ring is embedded in the limiting clamping groove, the end portion of the metal steel pipe is provided with a clamping groove, the clamping convex rib is embedded in the clamping groove, the metal end flange and the plastic end flange are coaxially arranged in a butt-joint mode, and the annular elastic rubber sealing ring is clamped between the metal end flange and the plastic end flange. Further, the end face of the metal end flange facing the plastic end flange is arranged in parallel with the end face of the plastic end flange facing the metal end flange. Further, the metal end flange plate and the plastic end flange plate are respectively provided with coaxial corresponding mounting through holes, two ends of the stud bolts are respectively penetrated in the corresponding coaxial mounting through holes, and two ends of the stud bolts are respectively connected with locking nuts in a threade