CN2660277Y

CN2660277Y - Pipe connection with axial sliding bush

Info

Publication number: CN2660277Y
Application number: CN 03271988
Authority: CN
Inventors: 周晓宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-08
Filing date: 2003-07-08
Publication date: 2004-12-01
Anticipated expiration: 2013-07-08

Abstract

A pipe joint with axial slide casing is able to connect the pipe joint of equipment into the closed pipeline and compensate the axial pipe joint, in particular to the connection between the household meter and the supply pipe. The utility model includes a nut connected with a meter joint and a joint body connected with a water pipe. The utility model is characterized in that: a slide casing is arranged between the nut and the joint body; one end of the slide casing is connected in sealing with the meter joint through an upper stop ring and the other end of the casing can slide into the hole of the joint body; the slide casing and the joint body are connected through a compression nut; the nut is provided with a round counterbore in the center and the hole is provided with a conical annular lacing ring of matched shape; the lacing ring is provided with a seal ring arranged on the external wall of the slide casing and a group of slots are evenly distributed on the peripheral wall to tighten or loosen the seal ring through revolving the compression but. The utility model solves the innerstress in connection device or pipeline without eliminating the axial gap and the replacement of seal ring in demolition of the prior pipe joint.

Description

Tape spool is to the pipe joint of sliding sleeve pipe

Technical field

The utility model relates to a kind ofly can be connected to pipe joint in the airtight pipeline with the mouth of pipe of equipment by swivel nut, especially a kind of assemblage gap or the caused axial length that expands with heat and contract with cold that can compensation conduit change, with the pipe joint of the internal stress of cutting down pipeline or connection device.It can be used for the airtight connection of various device in gas, liquid pipeline, can be used for the connection of domestic meter in water supply line especially.

Background technique

The existing pipe joint that water meter can be installed in the supply channel, it contains a pipe junctor and is positioned at the pipe thread that can be respectively be tightly connected with the nut that is tightly connected, with water pipe with the mouth of pipe of water meter at pipe junctor two ends.Its shortcoming is: 1) though it belongs to removable connection, but when tearing the back refitting open, because of changing, sealing gasket compressive strain, assemblage gap occur leaking, therefore this removable connection is just as fixedly connected, inconvenient dismounting, it should not be used to want regular dismounting, to pick up the connection of water meter in supply channel of surveying its degree of accuracy; Need leave the axial clearance of convenient mounting or dismounting when 2) installing because of water meter, even also to leave the required axial clearance of expanding with heat and contract with cold, therefore require pipe joint that the effect of automatic compensating axial clearance is arranged, to cut down the internal stress in water meter case, but existing pipe joint does not have the ability of automatic compensating axial clearance, cause water meter case can not use sanitation and hygiene and the low plastics manufacturing of cost, and must use high-intensity metallic material.

Chinese patent 93242179.2 disclosed " convenient sealing telescopic movable pipe joint ", it realizes sealing with the tapered sleeve that thread bush holds out against in the fittings body.It also has the same shortcoming of aforementioned tubes joint, only can realize disposable being tightly connected, and can't be used for wanting being tightly connected of frequent dismounting, and the problem of the compensation conduit axial clearance that may occur more automatically.

Summary of the invention

The utility model is to overcome the existing shortcoming of above-mentioned existing pipe joint, the pipe joint of a kind of tape spool to the sliding sleeve pipe is provided, make it have axial clearance in the automatic compensation conduit to cut down the internal stress of connected equipment, and simple in structure, easy to use, long service life, that is its sealing gasket still can use and not have characteristics such as leakage after dismounting repeatedly.

The utility model tape spool is to the pipe joint of sliding sleeve pipe, and it contains the nut that can connect the water meter mouth of pipe, with the pipe junctor that water pipe connects, and it is characterized in that: have a sliding sleeve pipe between nut and pipe junctor; One end of this sliding sleeve pipe is connected with the water meter ferrule by the seam circle on it, and other holds kink in the endoporus of the pipe junctor of slip; Sliding sleeve tube and tube junctor connects with gland nut, band center circle taper hole in this gland nut, and wear the tight ring of a conial ring shape that is complementary with its shape in the center circle taper hole; Hoop is housed in the tight ring is enclosed within seal ring on the sliding sleeve pipe outer wall, and on its perisporium uniform one group can be by rotatably compressing the notch that nut makes the seal ring banding or unclamps the sliding sleeve pipe.

The utility model tape spool is to the pipe joint of sliding sleeve pipe, and being tightly connected of its water tube and tube junctor can be that pipe thread connects, and also can be that hot melt connects; The material of pipe joint can be metal or plastics.

The beneficial effects of the utility model are: 1) the utility model pipe joint can be eliminated automatically by the axial slip of its sliding sleeve pipe in fittings body and be connected the axial clearance because of installing or expanding with heat and contract with cold and occur in the pipeline, thereby make things convenient for the dismounting of water meter in supply channel, and cut down the internal stress of water meter case, so that housing can adopt the plastics manufacturing of sanitation and hygiene and low cost of manufacture, and long service life; 2) gland nut on turn the utility model pipe joint, change the axial position of this nut on tight ring, can change tight ring notch end diameter, regulate the sealing banding degree of seal ring to the sliding sleeve pipe, make the sliding sleeve pipe can slippage when the balancing axial gap, guarantee the sealing that connects again, and should regulate easy; 3) in the installation of each detection water meter, can increase the compress variation that the rotating amount of gland nut on tight ring offset seal ring by trace, thereby keep its sealing effect before dismounting, so the seal ring in the utility model pipe joint need not be changed its long service life, convenient disassembly in dismounting.

Description of drawings

Fig. 1 plan view that to be the utility model tape spool partly cut open to the pipe joint band of sliding sleeve pipe;

Fig. 2 and Fig. 3 are the parts drawings of the tight ring 3 among Fig. 1, and wherein Fig. 2 is that it is that it is with the plan view that partly cuts open on Fig. 1 position at the locational left view of Fig. 1, Fig. 3;

Fig. 4 is the node I enlarged view among Fig. 3.

Label declaration among the figure: 1-nut: 2-sliding sleeve pipe; 2a-seam circle; The 3-tight ring; The 3a-notch; The 4-seal ring; The 5-gland nut; 6-manages junctor; The mouth of pipe of 7-water meter; The 8-sealing gasket; The 9-water pipe; The gap of S-slippage;

Embodiment

The present embodiment tape spool is to the pipe joint of sliding sleeve pipe, its structure can be seen from Fig. 1, it contains the nut 1 of the band sealing gasket 8 that an energy connects with the mouth of pipe 7 (representing with double dot dash line among Fig. 1) of water meter, the pipe junctor 6 that energy connects with pipe thread seal with water pipe 9 (also representing with double dot dash line among Fig. 1), and between nut 1 and pipe junctor 6 a sliding sleeve pipe 2 is housed.The sliding sleeve pipe is pressed between sealing gasket 8 and the nut 1 by the seam circle 2a that its left end has, and the mouth of pipe 7 that makes it and water meter to be being tightly connected, its right-hand member sleeve in the endoporus of pipe junctor 6, leaving in endoporus can be for the gap S of its axial slip.Sliding sleeve pipe 2 is connected with gland nut 5 with pipe junctor 6, and wears the tight ring 3 of a conial ring shape that is complementary with its shape in the center circle taper hole of gland nut.The structure of tight ring also can see from Fig. 2-Fig. 4, and it is enclosed within on the outer wall of sliding sleeve pipe 2 by O type seal ring 4 hoops that are equipped with in it, and uniform one group of totally eight notch 3a on the big opening end of its perisporium.

Use the present embodiment tape spool when the pipe joint of sliding sleeve pipe, with nut 1 and sealing gasket 8 mouth of pipe 7 of the seam circle 2a of sliding sleeve pipe and water meter being tightly connected earlier is integral, and the while will be managed junctor 6 and water pipe 9 again and is connected with pipe thread seal; Then an O type seal ring 4 is set on the outer wall of sliding sleeve pipe 2, on the outer wall of seal ring, puts tight ring 3, gland nut 5 more successively, and with gland nut 5 with the pipe junctor 6 to be threaded; Regulate the sealing tightening force of O type seal ring 4 on sliding sleeve pipe 2 outer walls at last,, do not influence sliding sleeve pipe 2 floating in eliminating axial clearance again so that tight ring 3 can play the effect of leakproof.Adjusting to the required tightening force of O type seal ring 4 motive sealings, be to realize: as turn gland nut 5, make its fine motion to the right by turn gland nut 5, then the conical wall of tight ring 3 with notch 3a promptly draw in, on tight ring 3, produce radial force to the center to the center, thereby realize the sealing banding of 4 pairs of sliding sleeve pipes of O type seal ring; At dismounting water meter or transfer the banding of loose O type seal ring 4 to do the time spent, the gland nut 5 that can reverse makes that tight ring 3 centrifugally resets at the conical wall at notch 3a place, O type seal ring 4 is loose from the sliding sleeve pipe.Therefore, when the dismounting water meter, do not need to dismantle water pipe 9 and manage being tightly connected of junctor 6, and eliminate the axial clearance of pipeline by the axial float of sliding sleeve pipe 2 in fittings body 6.Therefore the utility model pipe joint can allow to exist assemblage gap, makes easy accessibility, and when refitting, also can eliminate the gap that is produced because of seal ring 4 compressive strains by turn gland nut 5, so the long service life of seal ring 4 and easy accessibility.

Water pipe 9 in the present embodiment is to be threaded with pipe junctor 6, but this be connected do not need in the water meter disassembly process moving it, so water pipe 9 with manage junctor 6 and also can adopt hot melt to be connected.

The present embodiment pipe joint, because of itself need not bear axial force, so it is except with metal, as copper, iron, stainless steel etc. are outside the material, also can adopt nonmetallic material, especially with nontoxic plastics manufacturing, so that its internal surface is clean, smooth, and low cost of manufacture.

Claims

1, a kind of tape spool is to the pipe joint of sliding sleeve pipe, and it contains the nut (1) that can connect the water meter mouth of pipe, with the pipe junctor (6) that water pipe connects, and it is characterized in that: have a sliding sleeve pipe (2) between nut and pipe junctor; One end of this sliding sleeve pipe is connected with the water meter ferrule by the seam circle (2a) on it, and other holds kink in the endoporus of the pipe junctor (6) of slip; Sliding sleeve tube and tube junctor connects with gland nut (5), band center circle taper hole in this gland nut, and wear the tight ring (3) of a conial ring shape that is complementary with its shape in the center circle taper hole; Hoop is housed in the tight ring is enclosed within seal ring (4) on the sliding sleeve pipe outer wall, and on its perisporium uniform one group can be by rotatably compressing the notch (3a) that nut makes the seal ring banding or unclamps the sliding sleeve pipe.

2, tape spool according to claim 1 is characterized in that to the pipe joint of sliding sleeve pipe: said water pipe (9) is being tightly connected of pipe thread with being tightly connected of pipe junctor (6).

3, tape spool according to claim 1 is characterized in that to the pipe joint of sliding sleeve pipe: said water pipe (9) is that hot melt is connected with being tightly connected of pipe junctor (6).

4, according to claim 1 or 2 or 3 described tape spools to the pipe joint of sliding sleeve pipe, it is characterized in that: each assembly of said pipe joint is a plastic assembly.