CN2527832Y

CN2527832Y - Internal expansion fast cap

Info

Publication number: CN2527832Y
Application number: CN 01273561
Authority: CN
Inventors: 陈奋森
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-12-25
Filing date: 2001-12-25
Publication date: 2002-12-25
Anticipated expiration: 2011-12-25

Abstract

The utility model relates to an internal-expanding-type quick blanking adapter which is composed of a screw rod, an expanding head, an expanding obturating ring and a thrust nut. Wherein the middle of the screw rod is provided with a through hole and one end of the screw rod has turbination; the expanding head is sleeved on the turbination end of the screw rod; the joint end of the internal expanding obturating ring and the thrust nut is provided with a chamfer angle concave inward for matching with the cone-shaped head of the thrust nut the inside of the thrust nut is provided with an internal thread structure for matching with the external thread of the screw rod. The quick blanking adapter of the utility model which is characterized by good tightening performance and wide application range is applicable to quick plugging of pipeswith gas, water, oil and other liquid flowing inside to ensure the pipes to be safe, free of leakage and convenient for assembly and disassembly.

Description

The quick plug of internal expansion type

The utility model relates to the quick plug of internal expansion type, especially is applicable to the quick plug of motor vehicle exhaust.

Existing quick plug is to expand outer stifled shape in belonging to, promptly expand in the expansion head, seal ring is stifled outward, and this device in use can not be fastenedly connected safely in the motor vehicle outlet pipe, produces along with the increase of tail gas pressure easily, there is potential safety hazard, and this device can only be used for the connection of flat mouthful of outlet pipe, because the defective of device, use is restricted for the outlet pipe of angle, and the expansion head of this device can't be realized infinite extension, otherwise will cause the fracture and can't use.In addition, it can not play a role in filtering to the particle of the incomplete combustion in the tail gas, makes particle along with gas replenishment process enters the tire inner core, the tire inner core is caused damage, thus the working life of shortening tire.

It is a kind of simple in structure, small and exquisite, easy to use, safe that the purpose of this utility model is to provide, and is easy to carry, and can carry out the quick plug of internal expansion type of quick blocking to the pipe end of different shape.

The purpose of this utility model is achieved through the following technical solutions, and it is made up of screw rod, expansion head, interior expansion seal ring and pushnut.One end of screw rod is turbination.Be with the expansion head outside inverted cone one end of screw rod, the expansion head is made up of lobe leaf separate more than two, is provided with a groove at the afterbody of expanding head, is with fastening spring in groove, makes plural leaf lobe be linked to be an integral body, constitutes the expansion head.The end that interior expansion seal ring is connected with pushnut is provided with a chamfering that caves inward, and matches with the conical head of pushnut, and the inboard of pushnut is provided with female thread structure, matches with the outside thread of screw rod.

Good, widely applicable characteristics that quick plug of the present utility model has tightness.Be applicable to the quick blocking of stream material pipeline in gas, water, the wet goods, make its safety, do not reveal that the interior formula double-outspreading structure of its design has played the effect that firmly connects under various large, medium and small pressure, guarantee not produce, and guarantees operator's personal safety.Stainless steel filtering net modern design in the plug, when the utility model plug is used to utilize the occasion that motor-vehicle tail-gas inflates tire, unburnt particulate matter in the outlet pipe can be carried out sieving, after guaranteeing that gas enters tire, tire is not caused damage, played and purified the effect of filling gas, and filter screen can wash and use repeatedly.The distinctive feature of the utility model plug is that also it can realize freely expanding, and is tool under a kind of multipurpose, and its installing/dismounting is very convenient.

Fig. 1 is a structure cut-away view of the present utility model.

Fig. 2 is the overall structure schematic representation of multipurpose expansion head.

Fig. 3 is illustrated plan view.

Fig. 4 is a lobe impeller structure schematic representation.

In order to make the utility model structure clear more complete, be described further below in conjunction with accompanying drawing.

Embodiment 1:

As shown in Figure 1, the end that screw rod 1 stretches in the pipeline is inverted cone, and filter screen 2 is equipped with in the end, and the center is provided with through hole 8, and the other end is stair-stepping closing in.Expansion 3 at the inverted cone mouth overcoat of screw rod 1, expansion 3 structure are horn-like as shown in Figure 2, this is horn-like is made up of three lobes, afterbody in expansion 3 has circular groove 6, in groove 6, be with fastening spring 4, make three lobe leaves be linked to be whole afterbody endoporus place and the three lobe blade afterbodys knot seam place that constitutes expansion 3 chamfering is arranged, when screw rod 1 precession, horn mouth upwards slides and opens gradually along the taper of screw rod 1, bell-mouthed maximum end is held out against gradually in insides of pipes, expand structure in realizing one.Interior expansion seal ring 7 is to form with rubber processing, the end that it is connected with pushnut 9 has a chamfering, match with the conical head of pushnut 9, the interior seal ring 7 that expands has a seal ring opening slot 6 of being convenient to expand near on the cylindricals of chamfered end, when pushnut 9 precessions, the tapered end of pushnut 9 is pushed ahead along the chamfering of caving in of seal ring, and the rubber excircle can expand outwardly expansion because of extruding, cylindrical is tightly withstood on the inner-walls of duct, on expanding in realizing second.A pad or a packing ring 5 that plays buffer function is arranged between interior expansion seal ring 7 and expansion 3, and the inboard of pushnut 9 is female thread structures, matches with the outside thread of screw rod 1.

Embodiment 2:

The center of screw rod 1 does not have through hole, and other structures are identical with embodiment 1.The utility model product is applicable to the quick blocking to various pipelines, to reach the material that do not allow in the pipeline purpose to external leakage.

When the infrastructure product that adopts embodiment 1, when being used to utilize motor-vehicle tail-gas that automobile tyre is inflated, with pushnut forward during precession, the expansion of expansion head, frictionally tightly withstands on the outlet pipe inwall, the front end of plug is located in outlet pipe, when continuing the precession nut, the extruding that is subjected to front and back owing to interior expansion seal ring expands outwardly seal ring, make seal ring and exhaust wall hold out against and fixedly positioning, the pressure of gas can't back down plug like this, reach purpose of safety, gas just charges in the tire by the through hole of screw rod inside, if install a safety pressure valve additional on the inflation connecting tube, inflation pressure of tire is remained in the safe scope, can make tyre inflation more safe and reliable.

The utility model can extensively be suitable for the quick obstruction to the various pipelines in following, agriculture and the life.

Claims

1, the quick plug of a kind of internal expansion type, it is characterized in that: it is by screw rod, the expansion head, interior seal ring and the pushnut composition of expanding, one end of screw rod is turbination, outside inverted cone one end of screw rod, be with the expansion head, the expansion head is made up of lobe leaf separate more than two, afterbody at the expansion head is provided with a groove, in groove, be with fastening spring, make plural leaf lobe be linked to be an integral body, constitute the expansion head, the end that interior expansion seal ring is connected with pushnut is provided with a chamfering that caves inward, and matches with the conical head of pushnut, the inboard of pushnut is provided with female thread structure, matches with the outside thread of screw rod.

2, the quick plug of internal expansion type according to claim 1, it is characterized in that: the center at screw rod is provided with through hole.

3, the quick plug of internal expansion type according to claim 2 is characterized in that: the other end of screw rod is stepped closing in.

4, the quick plug of internal expansion type according to claim 3 is characterized in that: the profile of expansion head is horn-like.

5, the quick plug of internal expansion type according to claim 4 is characterized in that: expanding end to end, portion's endoporus place and leaf lobe afterbody seam crossing are provided with chamfering.

6, the quick plug of internal expansion type according to claim 5, it is characterized in that: the end that is inverted cone at screw rod is provided with filter screen.

7, the quick plug of internal expansion type according to claim 6 is characterized in that: be provided with pad or packing ring between interior expansion seal ring and expansion head.

8, the quick plug of internal expansion type according to claim 7 is characterized in that: interior expansion seal ring has an opening slot of being convenient to expand near on the cylindrical of chamfered end.