CN205842072U

CN205842072U - Anti-extrusion device at a kind of heavy caliber PVC socket joint

Info

Publication number: CN205842072U
Application number: CN201620751684.3U
Authority: CN
Inventors: 袁本海; 朱瑞霞; 贾金金
Original assignee: Hebei Quan En High-Tech Pipe Co Ltd
Current assignee: Hebei Quan En High-Tech Pipe Co Ltd
Priority date: 2016-07-18
Filing date: 2016-07-18
Publication date: 2016-12-28
Anticipated expiration: 2026-07-18

Abstract

Anti-extrusion device at a kind of heavy caliber PVC socket joint, including the two symmetrically arranged clips of set and several pull bars of connection two set clips, each set clip is fastened on the outside at heavy caliber PVC socket joint respectively, each set clip is made up of three pieces of the most involutory clip splits respectively, each clip split is circular arc, the intrados of clip split arranges pawl, and pawl touches with heavy caliber PVC outer surface, and pawl incline direction is in opposite direction with what tubing disengaged.When this utility model uses, each set clip and the tight obvolvent of heavy caliber PVC, effectively prevent clip dislocation, slide, reduce the impact that stress is concentrated, relative position at tubing bell and spigot is made reliably to fix, in the pressure limit that heavy caliber PVC can bear, even under the conditions of non-buried pressure-bearing uses, bell and spigot junction does not falls out yet.

Description

Anti-extrusion device at a kind of heavy caliber PVC socket joint

Technical field

This utility model relates to Anti-extrusion device at a kind of tubing auxiliary, particularly heavy caliber PVC socket joint.

Background technology

PVC is usually used in feed pipe, drain pipe.In recent years, bigbore PVC pipeline quickly grows, and applies the most general Time.Some tubing are connected with each other executing man-hour requirement by bigbore PVC according to pipeline length, adjacent tubing junction General employing sealing ring socket joint connects, and for preventing from disengaging at bell socket, generally requires and arranges clip at tubing bell socket. In the course of the work, pressure-bearing is big, rate-of flow is big for heavy caliber PVC pipeline, runs for a long time, particularly bury non-under pressure state Under the conditions of ground, lack soil layer and wipe resistance, abjection phenomenon easily occurs at pipeline spigot-and-socket.The common clip used at present is typically It is connected at the bell and spigot of tubing in involutory mode with two pieces of half hoops.There is the problem that 1, clip inner surface and tubing appearance Face contact friction force is little, and when conduit running pressure increases, clip can not effectively be fixed the relative position of bell and spigot, thus occur Dislocation, causes tubing to leak；2, the involutory surface of clip split lacks corresponding location structure, easily occurs that Relative sliding misplaces, Make clip unbalance stress, cause the location to tubing bell and spigot to be lost efficacy；3, for heavy caliber PVC, pipe outer surface The defects such as non-round, local crowning easily occur, uses two flap-type clip splits, easily cause clip stress raisers.In addition The diameter of clip is big, heavy, pressure-bearing are big, and carrying and difficulty of construction are bigger.

Utility model content

The purpose of this utility model is the drawback for prior art, it is provided that a kind of bearing capacity is big, bonding strength is high, Stress can be reduced concentrate and be easy to Anti-extrusion device at the heavy caliber PVC socket joint of construction.

Problem described in the utility model realizes with following technical proposals:

Anti-extrusion device at a kind of heavy caliber PVC socket joint, including the two symmetrically arranged clips of set and connection two set card Several pull bars of hoop, each set clip is fastened on the outside at heavy caliber PVC socket joint respectively, and each set clip is respectively by the most right The three pieces of clip split compositions closed, each clip split is circular arc, and the intrados of clip split arranges pawl, pawl and heavy caliber PVC outer surface touches, and pawl incline direction is in opposite direction with what tubing disengaged.

Anti-extrusion device at above-mentioned heavy caliber PVC socket joint, of each clip split be provided opposite to boss, another Individual interface arranges groove, the boss of adjacent clip split interface and matching grooves tenon and closes.

Anti-extrusion device at above-mentioned heavy caliber PVC socket joint, each clip split extrados is provided with two pull bars and connects Ear, is provided with tie rod hole at pull bar engaging lug；The interface of each clip split is provided with lug, to being provided with two at lug Docking bolt hole.

Anti-extrusion device at above-mentioned heavy caliber PVC socket joint, described pull bar arranges the six roots of sensation altogether, and the upper and lower side of each pull bar sets There is locking nut.

This utility model designs for the problem easily disengaged at heavy caliber PVC socket joint, and described device includes two sets The pull bar that two set clips are reliably connected by symmetrically arranged clip and the six roots of sensation.For making each clip reliably position, in each clip split Inner surface be provided with pawl；For reducing the stress concentration of clip and tubing contact surface, often set clip is by three pieces of clip splits pair Conjunction forms；For solving to occur gliding dislocations problem, the involutory surface of each clip split to use rebate to close structure between clip split. Above-mentioned improvement can make described device in use, each set clip and the tight obvolvent of heavy caliber PVC, effectively prevents clip wrong Position, slip, reduce the impact that stress is concentrated, make relative position at tubing bell and spigot reliably fix, in heavy caliber PVC institute In the pressure limit that can bear, even under the conditions of non-buried pressure-bearing uses, bell and spigot junction does not falls out yet.

Accompanying drawing explanation

The utility model is described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the top view of Fig. 1；

The structural representation of Fig. 3 clip split；

Fig. 4 is the schematic diagram of pawl and PVC contact condition.

In figure, each list of reference numerals is: 1, heavy caliber PVC, 2, clip, and 2-1, clip split, 2-1-1, pawl, 2-1- 2, groove, 2-1-3, boss, 2-1-4, pull bar engaging lug, 2-1-5, to lug, 3, at heavy caliber PVC socket joint, 4, pull bar.

Detailed description of the invention

Referring to Fig. 1, this utility model includes that the two upper and lower symmetrically arranged clips 2 of set and connection two set the several of clip draw Bar.Often set clip is clamped on the upper and lower sides of 3 at heavy caliber PVC socket joint respectively, and the two ends of pull bar are each passed through each set clip, By being arranged on the locking nut of each tie rod end by draw lever locking.This utility model pull bar 4 is provided with the six roots of sensation altogether.

Referring to Fig. 1-Fig. 4, this utility model often overlaps clip and is made up of, respectively three pieces of the most involutory clip split 2-1 respectively Clip split is circular arc, constitutes annular clip after three pieces of clip splits are involutory.The internal diameter of clip and heavy caliber PVC 1 External diameter coupling.For heavy caliber PVC, the diameter of clip is big, heavy, pressure-bearing are big, uses three pieces of clip splits Two relatively conventional flap-type can reduce tube surfaces defect and concentrate the stress of clip split；Clip split can also be reduced Deadweight, and it is easy to carrying construction and maintenance.For increasing the frictional force between clip and heavy caliber PVC, in clip split Intrados is provided with pawl 2-1-1, and pawl directly contacts with the outer surface of heavy caliber PVC, pawl incline direction and tubing Disengage is in opposite direction.After pawl is set, considerably increases the adhesion of clip and heavy caliber PVC, effectively prevent clip Dislocation, slip, make relative position at PVC bell and spigot reliably fix.

Fig. 1, Fig. 3, for preventing from Relative sliding dislocation occurring, at an interface of each clip split between clip split Arrange boss 2-1-3, another interface arranges groove 2-1-2, the boss of the interface of adjacent clip split and matching grooves Tenon closes.This structure passes through boss, the positioning action of groove, makes to be formed between each clip split to be reliably connected, will not be because of clip office Portion's stress causes time bigger between clip split and misplaces.

Referring to Fig. 1, Fig. 2, Fig. 3, the extrados of each clip split is provided with two pull bar engaging lug 2-1-4, and pull bar is even The tie rod hole for penetrating pull bar it is provided with at lug；The interface of each clip split is provided with lug 2-1-5, goes out to set to lug Have for penetrating the docking bolt hole to connecting bolt.

Referring to Fig. 1, when this utility model uses, except the upper and lower sides of 3, clip is installed at heavy caliber PVC socket joint respectively, Penetrate connecting bolt and lock after involutory for clip split, make clip and the tight obvolvent of heavy caliber PVC；Then upper and lower two Each pull bar engaging lug of set clip penetrates six roots of sensation pull bar, and by locking nut by draw lever locking.

Onsite application shows, uses this utility model to can ensure that heavy caliber PVC bell and spigot is reliably connected, at great Kou In the pressure limit that footpath PVC can bear, even under the conditions of non-buried pressure-bearing uses, also will not in bell and spigot junction Abjection.

Claims

1. Anti-extrusion device at a heavy caliber PVC socket joint, it is characterised in that: include the symmetrically arranged clip of two set (2) With several pull bars of connection two set clips, each set clip is fastened on the outside of (3) at heavy caliber PVC socket joint respectively, respectively overlaps Clip is made up of three pieces of the most involutory clip splits respectively, and each clip split is circular arc, the intrados of clip split (2-1) Arranging pawl (2-1-1), pawl touches with heavy caliber PVC outer surface, the direction phase that pawl incline direction and tubing disengage Instead.

Anti-extrusion device at heavy caliber PVC socket joint the most according to claim 1, it is characterised in that: each clip divides One interface of body arranges boss (2-1-3), another interface arranges groove (2-1-2), adjacent clip split interface Boss and matching grooves tenon close.

Anti-extrusion device at heavy caliber PVC socket joint the most according to claim 2, it is characterised in that: each clip split Extrados is provided with two pull bar engaging lugs (2-1-4), is provided with tie rod hole at pull bar engaging lug；The interface of each clip split sets It is provided with lug (2-1-5), to being provided with two docking bolts hole at lug.

Anti-extrusion device at heavy caliber PVC socket joint the most according to claim 3, it is characterised in that: described pull bar (4) Arranging the six roots of sensation altogether, the upper and lower side of each pull bar is provided with locking nut.