CN203641720U

CN203641720U - Pipeline connecting piece

Info

Publication number: CN203641720U
Application number: CN201320850333.4U
Authority: CN
Inventors: 叶勇文
Original assignee: Fitok Inc
Current assignee: Fitok Inc
Priority date: 2013-12-14
Filing date: 2013-12-14
Publication date: 2014-06-11
Anticipated expiration: 2023-12-14

Abstract

The utility model discloses a pipeline connecting piece and specifically relates to a loop-type pipe joint used for connecting glass pipelines. The pipeline connecting piece comprises a joint body having a conic counterbore, a nut engaged with the joint body by screw threads, and a sealing assembly located between the joint body and the nut. The sealing assembly is composed of two rigid rings and one flexible ring. The flexible ring is located between the rigid rings. According to the utility model, by virtue of arranging the sealing assembly, the connecting and sealing between the glass pipelines can be realized; and moreover, the pipeline connecting piece is good in sealing performance and convenient for dismounting and cleaning, and is repeatedly-usable.

Description

A kind of pipe joint

Technical field

The utility model relates to pipeline connection area, relates more specifically to a kind of Bite type fittings connecting for glass tube.

Background technique

Connection set between the pipeline generally using in pipe-line system is exactly pipe joint, generally includes flared type, welding type and FERRULETYPE.Wherein Bite type fittings have simple in structure, convenient, reliability high be installed be widely used.Bite type fittings is in the market of a great variety, often decides the material of used pipe fitting according to the environment of its use, and as in high-pressure system or the stronger system of corrosivity, tube material may be that stainless steel or the stronger material of anticorrosive property are made.

Glass tube because of its have better than other materials transmission of light, good stability, the characteristic such as corrosion-resistant is used widely and has irreplaceability in biological products industry, chemical industry, laboratory equipment.The device that a lot of scenes and experimental facilities are used to indicate oil level or observation liquid flowing state uses glass tube to be used as watch window mostly, but the connection of glass tube is at present generally to use adhesion agent, this adhesion mode cannot be born higher overpressure, using scope is very limited, on the other hand, the glass pipe fitting of adhesive, sealing is poor, inconvenient disassembly, cleaning.

In the Chinese patent that is 200920022214.3 at application number, a kind of Quick connecting device of glass tube is disclosed, this device utilization machinery draw-in groove Placement has solved the assembly problem not being threaded at the outer wall of pipe fitting and the inwall of pipe connecting component, but this device processing cost is higher, sealing is poor, and very easily causes breaking of glass pipe fitting when mounted.Application number is in 201320156875.1 Chinese patent; the clip of a kind of quick connection glass pipe and glass reaction still is disclosed; although this patent effectively solved enlarging piping flange link operating difficulties, install trouble and bothersome take a lot of work, overexert easily cause pipeline to be connected Placement with shortcoming and the standard ground type pipeline such as the mouth of pipe breaks often to there will be and kill phenomenon; but its clip fastening piece is set to upper and lower two; one end is fixed with hinge type; the other end is fastening with clamping bolt; sealing is poor, installs complicated.

Model utility content

For above-mentioned deficiency of the prior art, the utility model provides a kind of pipe joint, described pipe joint comprises a fittings body with tapered counterbore, one with the nut of described fittings body thread engagement, and black box between described fittings body and described nut, described black box comprises the first hard ring, the second hard ring and flexible sealing ring.Described the first hard ring has the tapered front end face of the cooperation of contacting with described fittings body, front end has step hole, there is through hole in central authorities, described the second hard ring has ear end face and the center through hole of the cooperation of contacting with described nut, described flexible sealing ring has the outer surface of level and is close to the through hole of glass tube, described flexible sealing ring is between described the first hard ring and described the second hard ring, and the through hole of described the first hard ring and described the second hard ring through hole are all greater than the through hole of described flexible flexible sealing ring.

Preferably, described the first hard ring tapered front end face end has shoulder block, has step hole thereafter on end face.

Preferably, on described the second hard ring front-end face, there is step hole.

Preferably, at least one of them is embedded cooperation to described flexible sealing ring with the first hard ring or described the second hard ring.

Preferably, before and after installing, the front-end face of the ear end face of described the first hard ring and the second hard ring is axially gapped.

Preferably, before and after installing, described the first hard ring and described the second hard ring all do not come in contact with pipe.

Preferably, described flexible sealing ring at least comprises a flexible sealing ring.

Preferably, described flexible sealing ring is graphite annulus.

The beneficial effects of the utility model:

1, FERRULETYPE structure, good airproof performance, convenient disassembly, is easy to pipeline cleaning;

2, flexible sealing ring, avoids when installing the undue force defect such as cause that glass tube breaks;

3, reduce the wearing and tearing of flexible sealing ring in installation process.

Brief description of the drawings

Accompanying drawing 1 is for comprising the joint decomposing schematic representation of the utility model design;

Accompanying drawing 2 is local longitudinal sectional drawing after the jiont treatment that comprises the utility model design;

The joint a kind of preferred form partial structurtes schematic diagram of accompanying drawing 3 for comprising the utility model design;

Accompanying drawing 4 is for comprising another preferred form partial structurtes schematic diagram of joint of the utility model design;

Accompanying drawing 5 is for comprising the another preferred form partial structurtes of the joint schematic diagram of the utility model design;

Accompanying drawing 6 is for comprising a joint preferred form partial structurtes schematic diagram again of the utility model design;

Embodiment

For the ease of those skilled in the art's understanding, below in conjunction with accompanying drawing, the utility model will be further described, and in following preferred form, flexible sealing ring is graphite annulus.

As shown in Figure 1, the utility model comprises having the fittings body 10 of taper enlarging 66 and the nut 22 with fittings body 10 screw-thread fit, the first hard ring 16, flexible sealing ring 20 and the second hard ring 18, flexible sealing ring 20 is between the first hard ring 16 and the second hard ring 18.Wherein the first hard ring 16 has the tapered front end face 24 matching with fittings body 10 taper enlargings 66, the tack ear end face 32 of vertical caliber direction, center through hole 80 and be positioned at the step hole 70 of front end; The second hard ring 18 has the tack front-end face 42 of vertical caliber direction and the ear end face 34 of the taper that matches with nut 22 interior edge faces 26, and center through hole 82; Flexible sealing ring 20 has the outer surface 28 of level, tack bi-side 52,56 and be close to the through hole 50 of glass tube 12.

When fastening nut 22, nut 22 will drive the second hard ring 18, flexible sealing ring 20 and the first hard ring 16 to do axial motion successively, when the first hard ring 16 tapered front end faces 24 contact with fittings body 10 inner conical mouths 66 after extruding, fittings body 10 applies a reaction force in vertical surface of contact direction to the first hard ring 16 simultaneously.Because the hardness of flexible sealing ring 20 is far smaller than the hardness of the first and second hard rings, when further fastening nut 22, in nut 22 and fittings body 10, under active force, first there is plastic deformation in flexible sealing ring 20, tightly block glass tube 12, realize sealing.

An aspect of the present utility model is that the internal diameter 80 of the first hard ring and the internal diameter 82 of the second hard ring are all much larger than the internal diameter 50 of flexible sealing ring 20, the step hole 70 of the first hard ring 16 front ends provides downward creep space to the first hard ring 16 simultaneously, ensures after conical surface 24 and fittings body 10 taper enlargings 66 contact sealing completely and does not contact glass tube 12.So before and after the jiont treatment, the first hard ring 16 and the second hard ring 18 all do not come in contact with pipe 12, avoid breaking of glass tube 12 in installation process.

Fig. 3 is a kind of preferred form that comprises the utility model design, and wherein, the first hard ring 16 has shoulder block 30 at the end of its conical outer surface 24, has step hole 90 on ear end face 32, and one end 52 of flexible sealing ring 20 is placed in step hole 90.After the first hard ring 16 axial motions contact with fittings body 10 to shoulder block 30, the first hard ring 16 will not remake axial motion, overexertion when shoulder block 30 can be avoided installing, step hole 90 upwards plays the role of positioning to flexible sealing ring 20 in axial and footpath, prevents from being offset after its pressurized.

Fig. 4 is another preferred form that comprises the utility model design, and wherein, the first hard ring 16 has shoulder block 30, the second hard rings 18 to have step hole 92 on its front-end face 42 at the end of its conical outer surface 24, and one end 56 of flexible sealing ring 20 is placed in step hole 92.

Fig. 5 is the another preferred form that comprises the utility model design, wherein, the first hard ring 16 has shoulder block 30 at the end of its conical outer surface 24, on ear end face 32, there is step hole 90, the second hard ring 18 has step hole 92 on its front-end face 42, one end 52 of flexible sealing ring 20 is placed in step hole 90, and the other end 56 is placed in step hole 92, and flexible sealing ring 20 comprises multiple single graphite annuluss.

Fig. 6 is a preferred form again that comprises the utility model design, wherein, is embedded in positioning ring 62 around flexible sealing ring 20, and the axial width of positioning ring 62 is less than the axial width of flexible sealing ring 20.After joint is tightened, the two ends 86,66 of positioning ring 62 all do not contact with the first hard ring 16, the second hard ring 18.Of the present utility model another be conveniently, two hard rings are lived flexible sealing ring 20 " parcel ", reduce the wearing and tearing of flexible sealing ring 20, and the reusable while still can ensure good sealing effect.It is pointed out that in other preferred embodiments that comprise the utility model design, flexible sealing ring 20 allows to adopt certain mode to tighten together in advance with the first hard ring 16 and the second hard ring 18.In above-mentioned each preferred embodiment, the ear end face 32 of the first hard ring 16 and the front-end face 42 of the second hard ring 18 are axially gapped all the time.

The utility model is described with reference to preferred embodiment; the content of mentioning in above-described embodiment is not to restriction of the present utility model; by reading this specification; those skilled in the art can go out many modifications and variations to this structural framing; without departing from the concept of the premise utility, any apparent replacement is all within protection domain of the present utility model.

Claims

1. a pipe joint, comprise a fittings body (10) with taper enlarging (66), one with the nut (22) of described fittings body (10) thread engagement, and be positioned at the black box between described fittings body (10) and described nut (22), it is characterized in that described black box comprises the first hard ring (16), the second hard ring (18) and flexible sealing ring (20), described the first hard ring (16) has the tapered front end face (24) of the cooperation of contacting with described fittings body (10), front end has step hole (70), there is through hole (80) in central authorities, described the second hard ring (18) has ear end face (34) and the center through hole (82) of the cooperation of contacting with described nut (22), described flexible sealing ring (20) has the outer surface (28) of level and is close to the through hole (50) of glass tube (12), described flexible sealing ring (20) is positioned between described the first hard ring (16) and described the second hard ring (18), the through hole (80) of described the first hard ring (16) and described the second hard ring (18) through hole (82) are all greater than the through hole (50) of described flexible flexible sealing ring (20).

2. a kind of pipe joint according to claim 1, it is characterized in that: described the first hard ring (16) tapered front end face (24) end has shoulder block (30), has step hole (90) thereafter on end face (32).

3. a kind of pipe joint according to claim 1, is characterized in that: on described the second hard ring (18) front-end face (42), have step hole (92).

4. according to a kind of pipe joint described in claim 2 or 3, it is characterized in that: at least one of them is embedded cooperation to described flexible sealing ring (20) with the first hard ring (16) or described the second hard ring (18).

5. a kind of pipe joint according to claim 1, it is characterized in that: before and after installing, the front-end face (42) of the ear end face (32) of described the first hard ring (16) and the second hard ring (18) is axially gapped.

6. a kind of pipe joint according to claim 1 or 5, is characterized in that: before and after installing, described the first hard ring (16) and the second hard ring (18) all do not come in contact with glass tube (12).

7. a kind of pipe joint according to claim 1, is characterized in that: described flexible sealing ring (20) at least comprises a flexible sealing ring.

8. a kind of pipe joint according to claim 1, is characterized in that: described flexible sealing ring (20) is graphite annulus.