CN102788070A

CN102788070A - Sealing rivet

Info

Publication number: CN102788070A
Application number: CN2012102331781A
Authority: CN
Inventors: 陈文伟; 刘深广
Original assignee: WUXI RIBOLT FASTENER CO Ltd
Current assignee: WUXI RIBOLT FASTENER CO Ltd
Priority date: 2012-07-06
Filing date: 2012-07-06
Publication date: 2012-11-21

Abstract

The invention relates to a meal sealing tool and discloses a sealing rivet which comprises a pipe sleeve and a rivet rod, wherein a rivet head, a snapping point and a locking thread section are arranged on the rivet rod, the pipe sleeve is an expanded sealing body, and the rivet head is used for being contacted with the end face of the pipe sleeve to exert force on the end face of the pipe sleeve to enable the pipe sleeve to transversely deform. The sealing rivet is characterized in that deformation tanks are arranged outside the pipe sleeve. An inclined plane from outside to inside is arranged on one side of the rivet head close to the pipe sleeve, and the outermost side of the inclined plane is a sharp edge. By arranging a plurality of deformation tanks outside the pipe sleeve, resistance caused by outward expansion of the pipe casing is reduced, reliability of outward expansion of the pipe casing is improved, and the expansion motion can be quick and even. Besides, the deformation tanks do not reduce sealing performance but generate edges so that sealing effect can be greatly improved. Additionally, the inclined plane and the sharp edge are reliably and firmly contacted with the end face of the pipe casing, and the sealing rivet is easy to manufacture.

Description

A kind of sealing rivet

Technical field

The present invention relates to a kind of rivet, particularly a kind of sealing static part that is used for the blind hole obstruction.

Background technique

One type of expansion staking is arranged; Can be used to seal have pressure on the static single metallic element (the assembly sealing of irrotational motion or parallel motion) flowing medium (like water; Cooling liquid; Hydraulic oil, machine oil and some gas) or stop up the technology circular hole that need produce owing to machining on the metal workpiece.

Working principle: in the work of needs sealings (like cast iron; Cast aluminium etc.) circular inner hole that is prepared in advance on, available with boring or the method (pattern draft is no more than 5 degree) of casting, then nail bar one end of staking is put into special-purpose staking instrument firearm in advance; The other end pipe box (rivet body) inserts in the bottom outlet on the workpiece (Spielpassung); Pull the trigger on the instrument firearm, the nail bar can move along a straight line, thereby the pulling pipe box produces dilatancy radially; Fill bottom outlet, the fracture of nail bar is also locked in pipe box.

The concrete structure of above technological scheme has had open at the document of CN1575393 " sealing plug that is used for blind installation ".In the existing technology, employing be the lateral expansion that circular protrusions on ailhead guarantees pipe box.

But the existing technology part that still comes with some shortcomings at first is that the lateral expansion of pipe box is wayward, is softer material such as aluminium though pipe box adopts, still can't guarantee its expansion direction and harmony, and is unfavorable to sealing.Secondly, ailhead and pipe box have annexation, in the PROPEL of ailhead pull; Need a strength in the inner part be arranged to the pipe box end face; Improve the guidance quality of pipe box lateral expansion, thus the projection of a ring designed, but the processing of this structure is comparatively complicated.

And, need pipe box to form cydariform in the process of lateral expansion, the rigidity that needs very big strength to overcome material could realize that excessive work strength can influence the directivity and the speed of expansion, strength can influence sealing effect again inadequately.

Summary of the invention

The present invention is in order to overcome in the described existing technology of background technique about the various defectives of expansion direction and reliability aspect, and it is effective to invent a kind of novel sealed expansion, labour-saving sealing rivet.

Sealing rivet of the present invention is improvements over the prior art.

Comprise pipe box and nail bar, on the nail bar ailhead arranged, break a little and the locking screw section that sleeve pipe is expansion, seal, ailhead is used for contacting with the end face of pipe box, to the box face application of force, makes the sleeve pipe lateral deformation; It is characterized in that: the pipe box outside is provided with the distortion groove.

Preferably: described distortion groove is to be arranged in the pipe box outside and perpendicular to the circular groove of nail bar, quantitatively, preferred parallel be provided with 3 ~ 10, equidistant setting.

For improving the application of force effect of ailhead to sleeve pipe, guarantee both tight connections, near a side of pipe box, be provided with inclined-plane from outer to inner on the described ailhead.The outermost on this inclined-plane is a sharp edges, and when this sharp edges can be followed closely the bar pull, firm was embedded in the casing profile.

Another preferred version:, give sleeve pipe a deformation space, and this space has guidance quality in order better to guarantee the lateral expansion property of sleeve pipe.So, on the nail bar,,, be provided with the distortion receiving groove of indent near the box face place being inserted on the part of pipe box.

The beneficial effect of sealing rivet of the present invention is: through a plurality of distortion grooves of arranged outside, reduce the resistance of pipe box when extending out, improve the reliability that extends out expansion of pipe box, can make and expand action more fast, evenly.Simultaneously, vertical because the distortion groove is perpendicular to axial annular setting with the sealing angle, can not reduce sealability, can produce faceted pebble on the contrary, increase substantially sealing effect.Have again, the inclined-plane and the sharp edges of the present invention's design, with the robust that contacts of pipe box end face, and processing is simple.

Description of drawings

Fig. 1, structural drawing of the present invention.

Fig. 2, the partial enlarged drawing of the connection part of ailhead and pipe box.

Fig. 3, working procedure Fig. 1 of the present invention.

Fig. 4, working procedure Fig. 2.

Fig. 5, working procedure Fig. 3.

Embodiment

In conjunction with working procedure concrete structure of the present invention is described.

Like Fig. 1, Fig. 2, the present invention is one and has comprised a pipe box 1 and the nail bar 2 that is inserted in the pipe box the inside, is cylindrical body.The head of nail bar is an ailhead 3, and the ailhead contact is at the end face of pipe box 1, and nail bar 2 is a Spielpassung with pipe box, and there is the space of a little centre.The outer surface of sleeve pipe 1 is provided with six parallel, equidistant distortion grooves 4.The effect of these distortion grooves 4 is to let pipe box 1 when outwards expanding, give the leeway of a buffering, and the direction of expansion and the uniformity are guaranteed.At the end face near pipe box of ailhead 3, be provided with a circle inclined-plane 5 from outer to inner, the outermost on this inclined-plane is a sharp edges.Sharp edges is pressed on the end face of pipe box 1.On the part of pipe box 1 inside, also be provided with at least one distortion receiving groove 6 on the nail bar, wherein, on nail bar 2, be provided with such distortion receiving groove 6 near the pipe box end.The bottom of following closely bar 2 simultaneously also has locking screw section 7, and the part in pipe box also is provided with and breaks a little 8.Locking screw section 7 is used on riveting tool, applying pull power; Breaking a little 8 is thinner parts, pipe box 1 expand put in place after and after the hole that needs to stop up combines closely; 1 distortion is combined into one ailhead 3 with pipe box simultaneously; Original gap is filled, and nail bar 2 is from breaking a little 8 disconnections, and it is residual that the pipe box 1 of only surplus next sealing usefulness and part are followed closely bar.

Concrete working procedure of the present invention such as Fig. 3 ~ Fig. 5.

Fig. 3, pipe box 1 of the present invention are inserted in the blind hole, at this moment, have the space between pipe box and the blind hole, need fill up the completion mending-leakage to this space.What use is the staking instrument, and what this figure showed is the staking principle: use jacking block 9 to withstand pipe box 1 in the blind hole outside, outwards force in nail bar 2, carry out staking.

Fig. 4; The sharp edges on the inclined-plane 5 of ailhead 3 embeds pipe box 1 end face, drives the pipe box end face and does the distortion of turning in, at this moment; Distortion receiving groove 6 near the pipe box end face is at first filled up by the crushed element of pipe box 1; Not only given distortion a surplus, but also increased the combination force of pipe box, improved deformation effect with nail bar 2.Owing to turning in the end face, the expansion that pipe box 1 begins to expand outwardly is owing to have annular distortion groove 4 perpendicular to axial direction simultaneously; So; When extending out expansion, no longer be a smooth cydariform, but can magic flower occur at distortion groove 4 places; Formation has concavo-convex cydariform, can improve sealing effect.And because distortion groove 4 is grooves, the intensity of this part is lower, and the resistance when also just having reduced the extending out of whole pipe box 1 makes that to extend out speed of expansion faster, and firmly still less, under kind of situation, the direction that extends out expansion can be guaranteed, and seals more even.

Fig. 5, ailhead 3 embeds the very dark position of pipe box 1 end face, causes pipe box 1 further to extend out dilatancy, and pipe box 1 outer wall closely contacts with blind pore wall, has realized the sealing to blind hole.Simultaneously, all distortion receiving grooves 6 are filled up in the distortion of the internal layer of pipe box 1 and nail bar 2 contacting points.Pipe box 1 has also been accomplished tight contact seal with nail bar 2.

Break a little 8 disconnections at last, can adopt and break also and can cut off.Unnecessary nail bar is partly removed and has just been accomplished the process of using the present invention to seal.

Claims

1. a sealing rivet comprises pipe box (1) and nail bar (2), on the nail bar ailhead (3) is arranged, breaks point (8) and locking screw section (7), and it is characterized in that: pipe box (1) outside is provided with distortion groove (4).

2. sealing rivet according to claim 1 is characterized in that: what described distortion groove (4) was parallel is provided with 3 ~ 10.

3. sealing rivet according to claim 2 is characterized in that: described distortion groove (4) has 6.

4. according to the described sealing rivet of claim 1 ~ 3, it is characterized in that: described distortion groove (4) is perpendicular to the circular groove of nail bar (2).

5. sealing rivet according to claim 1 is characterized in that: near a side of pipe box, be provided with inclined-plane (5) from outer to inner on the described ailhead.

6. sealing rivet according to claim 5 is characterized in that: the outermost of described inclined-plane (5) is a sharp edges.

7. sealing rivet according to claim 1 is characterized in that: on the described nail bar (2), being inserted on the part of pipe box, near the box face place, be provided with the distortion receiving groove (6) of indent.