CN202012678U

CN202012678U - Anti-loosening fluid pipeline screw thread movable joint

Info

Publication number: CN202012678U
Application number: CN2011200010109U
Authority: CN
Inventors: 江绍成; 戴再农; 张顺祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-04
Filing date: 2011-01-04
Publication date: 2011-10-19
Anticipated expiration: 2021-01-04

Abstract

The utility model provides an anti-loosening fluid pipeline screw thread movable joint, which is characterized in that, on a moveable pipe joint at the external of a lock nut, an anti-loosening nut with rotating direction opposite to the screw thread rotating direction of the lock nut and with a smaller screw pitch is added, the rotating direction of loosening of the lock nut is rightly the rotating direction of locking of the anti-loosening nut, therefore, the anti-loosening nut can strongly prevent loosening of the locking nut, guaranteeing firm joint of a pipe joint. If a stop washer (or elastic washer) is added between the anti-loosening nut and the locking nut, anti-loosening capability can be further improved. The anti-loosening fluid pipeline screw thread movable joint is advantaged by simple structure, reliable anti-loosening, convenient assemble and disassemble, low cost, very wide use, good vibration and impact resistance, as well as particular suitability for mobile mechanical devices such as automobiles, airplanes, engineering machines, etc.

Description

The threaded for union of anti-easing fluid line

Technical field:

The fluid line threaded for union is the accessory commonly used in the fluid-transporting tubing, belongs to Machine Design and makes the field.

Background technique:

The fluid line threaded for union is because of withstand voltage height and easy accessibility are widely used in the machinery of chemical system, hydraulic pressure and air pressure, as automobile, aircraft, vessel, engineering machinery, all kinds of lathe, all kinds of chemical industry equipment and waterpipe etc.Different with use occasion because of pressure, they have multiple structural type, as tack welded tube formula, awl seal weld tubular type, FERRULETYPE, flared type, withhold glue pipe type etc.Their something in common is exactly a locking nut of all using kink on the end pipe joint, being spun on the other end has on the externally threaded permanent joint, the rotational lock nut furthers and strains two joints, again by the Sealing on the two joint contact surfaces, constitute the sealed type pipe joint, under working pressure, guarantee that the fluid in the pipe can not leak.The locking thread at this place is crucial, the normal less self-locking performance of the lead angle fine thread preferably that adopts, be created in frictional force on the helicoid to keep self-locking by axial pre tightening force, but in use, be subjected to the influence of various factors (as initial distortion, material creep, temperature variation, load change, vibratory impulse etc.), the self-locking friction torque at joint screw thread place can drop to critical value and make and give tight power and disappear, and joint is loosening to cause fluid to leak. This is a common phenomena in the machinery of motion, and it not only makes the system can't proper functioning even lead to major accident.The thread looseness that solves such joint better is the target of mechanic author's long-term endeavour, the anti-loose method of multiple spiral marking connections such as existing the sixth of the twelve Earthly Branches double nut being arranged, retainer is set, fixing, compound thread is dashed in riveting, but that they have is locking not too reliable; The mounting or dismounting inconvenience that has is even not removable; The manufacturing that has is difficulty, all is not applied to temporarily in the pipeline thread union.

The model utility content:

The threaded for union of the anti-easing fluid line of the utility model, propose for the loosening problem that solves this class threaded for union better, technological scheme is: on the active tube joint in the outside of locking nut, add an anti-loose nut opposite with the locking nut thread rotary orientation and pitch is less, after screwing locking nut, the anti-loose nut of backward rotation makes two nut surface of contact and tightly gets final product again, at this moment, turning to that locking nut is loosening just is anti-loose nut and tight turning to, therefore, anti-loose nut can powerfully stop the loosening of locking nut, has brought into play anti-pine effect effectively.If between anti-loose nut and locking nut, add lock washer or elastic washer, can stop anti-loose nut loosening in advance, further improve its anti-loose ability.

Its usefulness is:

(1) realized the purpose of powerful anti-pine from structure, reliable effect.

(2) do not change the structure and the size of the former fork-like farm tool used in ancient China of such pipe joint substantially.

(3) easy accessibility.

(4) simple in structure, easy to manufacture, cost is low.

Description of drawings:

Fig. 1 is anti-easing flow soldering pipeline thread movable joint structure figure

Fig. 2 is the anti-easing flow soldering pipeline thread movable joint structure figure of band lock washer

Fig. 3 is that anti-easing fluid is withheld sebific duct end face seal formula threaded for union structural drawing

Fig. 4 is that anti-easing fluid is withheld sebific duct conical surface seal formula threaded for union structural drawing

Embodiment:

Now example further specifies mode of execution of the present utility model in conjunction with the accompanying drawings.

The union of anti-easing flow soldering pipeline thread as shown in Figure 1,1 is pipeline, 2 is movable joint, 4 is seal ring, 5 for the dextrorotation locking nut, 6 be permanent joint, 3 is the less left-handed anti-loose nut of spiral shell square that is installed in locking nut 5 outsides.

The anti-easing flow soldering pipeline thread union of band lock washer as shown in Figure 2,7 for being clipped in lock washer or the elastic washer 7 between anti-loose nut 3 and the locking nut 5, other is identical with Fig. 1.

Anti-easing fluid is withheld the threaded for union of sebific duct end face seal formula as shown in Figure 3, and 8 is sebific duct, and 9 is the sebific duct steel bushing, and 10 is the movable flush end joint affixed with sebific duct, and other is identical with Fig. 1.

Anti-easing fluid is withheld the threaded for union of sebific duct conical surface seal formula as shown in Figure 4,11 is the loose axoide joint affixed with sebific duct, 12 is the fixed axoid joint, and 7 for being clipped in lock washer or the elastic washer 7 between anti-loose nut 3 and the locking nut 5, and other is identical with Fig. 1.

The threaded for union of the anti-easing fluid line of the utility model, simple in structure, anti-pine is reliable, mounting or dismounting are convenient, with low cost, and purposes is very extensive, and the anti-vibrating and impact performance is good, is particularly suitable in the sports type machinery such as automobile, aircraft, engineering machinery.

Claims

1. the threaded for union of anti-easing fluid line is characterized in that: on the active tube joint in the outside of locking nut (5), add an anti-loose nut (3) opposite with locking nut (5) thread rotary orientation and with locking nut (5) and tight.

2. by the threaded for union of the described anti-easing fluid line of claim 1, it is characterized in that: between anti-loose nut (3) and locking nut (5), add lock washer or elastic washer (7).