CN103015917A - Clamp device - Google Patents

Abstract

The invention provides a clamp device. The clamp device comprises a driving cylinder, a rack, a first gear, a second gear, a first jaw and a second jaw, wherein the rack is connected with the driving cylinder; the first gear and the second gear are respectively arranged on the two sides of the rack and meshed with the rack; and the first jaw and the second jaw are oppositely arranged, one sides of the first jaw and the second jaw are toothed sides, and the toothed sides of the first jaw and the second jaw are respectively meshed with the first gear and the second gear. The clamp device provided by the invention has main characteristics of: 1, automatic centering, namely that the relative distance between the axis line of a clamped drill rod or sleeve and the clamp device is always same regardless of the diameter of the drill rod or the sleeve; and 2, the clamp device has high mechanism reliability as a transmission mode which is extremely well developed in the machinery is adopted for the gears and the rack.

Description

Clamping device

Technical field

The present invention relates to a kind of clamping device, relate in particular to a kind of drilling rod of offshore boring island or clamping device of sleeve pipe of can be applicable to.

Background technology

Along with the in-depth that the mankind utilize petrol resources exploitation, oil-gas exploration and development changes the ocean over to from land.Therefore, the drilling engineering operation also must be carried out in the ocean of Hao writing brush.When carrying out the oil/gas drilling construction at sea, the rig that the hundreds of ton is heavy will have the space of enough support and placement, the place that also will have simultaneously the drilling implementer to live and live, and offshore drilling platforms has just been shouldered this important task.Offshore boring island is a kind of mobile ocean engineering platform for marine energy sources exploitation and prospecting.This class platform can arrive predetermined area work by the barge traction.When offshore boring island begins drilling well, the drilling rod of horizontal storage on the Platform Deck need to be moved on the cat road, then the drilling rod on the cat road vertically be put into rat hole, repeat above-mentioned action drilling rod is connected into a thribble at the rat hole place, deposit in the pipe setback at last.Sleeve pipe also is to deposit in the pipe setback after connecting into a thribble by above-mentioned steps.In above-mentioned steps, no matter drilling rod or sleeve pipe are under level or the plumbness, all need to have a cover clamping, positioner that drilling rod or sleeve pipe are clamped reliably.

Existing drilling rod and sleeve pipe clamping device adopt oil cylinder to add the form of connecting rod mostly, owing to needing the size of the diameter of the drilling rod of clamping and sleeve pipe to have tens kinds more than, adopt above-mentioned clamping device, the axial line of drilling rod and sleeve pipe and the relative distance of clamping device can change, this is so that put into them and bring problem when rat hole is connected into thribble, needs to adopt other device to adjust the relative distance of axial line and the clamping device of drilling rod and sleeve pipe.。

Summary of the invention

Above-mentioned deficiency for prior art the present invention proposes a kind of clamping device, has replaced the bar linkage structure of prior art with ripe gear ﹠ rack structure, has solved above-mentioned deficiency of the prior art.

Particularly, the present invention proposes a kind of clamping device, comprising: drive oil cylinder; Tooth bar is connected with described driving oil cylinder; The first and second gears, be arranged at respectively described tooth bar both sides and with the engagement of described tooth bar; And first and second jaws, positioned opposite to each other, a side of described the first and second jaws be with the band tooth limit of tooth limit and described the first and second jaws respectively with described the first and second gears engagement.

Preferably, in above-mentioned clamping device of the present invention, described tooth bar moves back and forth along first direction under the driving of described driving oil cylinder.

Preferably, in above-mentioned clamping device of the present invention, the reciprocating motion of described tooth bar will drive described the first and second gears rotation, and then drive described the first and second jaws and move up in the second party vertical with described first direction, the moving direction of wherein said the first jaw and described the second jaw is respect to one another.

Preferably, in above-mentioned clamping device of the present invention, a side respect to one another of described the first jaw and described the second jaw is an inner fovea part.

Preferably, in above-mentioned clamping device of the present invention, also comprise: shell structure coats a part, tooth bar and first and second gears of described the first and second jaws.

Preferably, in above-mentioned clamping device of the present invention, the inboard of described shell structure has a slide rail, moves up in described second party in order to guide described the first and second jaws.

The characteristics of clamping device of the present invention mainly are: 1. self-centering, i.e. and no matter drilling rod or the sleeve pipe of which kind of diameter, its axial line all is the same with the relative distance of clamping device after clamping; 2. mechanism reliability is high, adopts the mechanically type of belt drive of very ripe rack-and-pinion.

Should be appreciated that the above generality of the present invention is described and the following detailed description all is exemplary and explanat, and be intended to the further explanation that the invention provides for as claimed in claim.

Description of drawings

Comprise that accompanying drawing is for providing the present invention further to be understood, they are included and are consisted of the application's a part, and accompanying drawing shows embodiments of the invention, and play the effect of explaining the principle of the invention with this manual.In the accompanying drawing:

Fig. 1 schematically shows the structure according to a preferred embodiment of clamping device of the present invention.

The specific embodiment

Now with embodiments of the present invention will be described by referring to the drawings in detail.Now will be in detail with reference to the preferred embodiments of the present invention, its example is shown in the drawings.In the case of any possible, in institute's drawings attached, will represent with identical mark same or analogous part.In addition, although employed term is to select from public term among the present invention, but some mentioned terms may be that the applicant selects by his or her judgement in the manual of the present invention, and its detailed meanings illustrates in the relevant portion of the description of this paper.In addition, require not only by employed actual terms, but also will understand the present invention by the meaning that each term contains.

Fig. 1 schematically shows structure according to a preferred embodiment of the present invention.In the embodiment shown in fig. 1,clamping device 100 of the present invention mainly comprises:drive oil cylinder 101,tooth bar 102, thefirst gear 103, thesecond gear 104, thefirst jaw 105, thesecond jaw 106 andshell structure 107.

As shown in the figure,tooth bar 102 is connected with driving oil cylinder 101.The first and second gear 103-104 are arranged at respectively the left and right sides of tooth bar 102.This first and second gear 103-104 respectively with the left and right sides oftooth bar 102 on the tooth mouth be meshed.The first and second jaw 105-106 are positioned opposite to each other.The side of the first and second jaw 105-106 is to mesh with above-mentioned the first and second gear 103-104 respectively with the band tooth limit of tooth limit and this first and second jaw 105-106.In addition, a side respect to one another of thefirst jaw 105 and thesecond jaw 106 is an inner fovea part, so that the drilling rod of clamping tubulose or sleeve pipe.

Preferably, when above-mentioned clamping device work of the present invention,tooth bar 102 moves back and forth along first direction (for example, the vertical direction among Fig. 1) under the driving that drives oil cylinder 101.The reciprocating motion of thistooth bar 102 will drive the first and second gear 103-104 rotation, and then in the second direction vertical with first direction (for example drive the first and second jaw 105-106, horizontal direction among Fig. 1) upper mobile, wherein the moving direction of thefirst jaw 105 and thesecond jaw 106 is respect to one another.

According to a preferred embodiment, the present invention can also comprise a shell structure 107.Thisshell structure 107 coats a part,tooth bar 102 and the first and second gear 103-104 of the first and second jaw 105-106.Particularly, the inboard of thisshell structure 107 can arrange a slide rail, moves up in second party in order to guide the first and second jaw 105-106, finally finishes to clamp and the purpose of unclamping.

Clamping device can adopt cover or two covers as required, even more.

Adopted above-mentioned technological invention, make the present invention improve the shortcoming and defect on the prior art, because jaw moves horizontally, therefore after finishing clamping, the axial line of pipe and the relative position of clamping device are certain, so just drilling rod or sleeve pipe can accurately be put into rat hole, and connect into a thribble.

Below in conjunction with the embodiment of Fig. 1, the course of work ofclamping device 100 of the present invention is once described briefly:

At first, drivingoil cylinder 101 retracts, band carry-overbar 102 moves up, by rack and pinion engagement, driveleft side gear 103 counterclockwise rotations,right side gear 104 clockwise rotations, then drivingleft side jaw 105 moves right in the slide rail ofshell structure 107,right side jaw 106 is moved to the left in the slide rail ofshell structure 107, until tube grip, reaches till the default clamping force.Release process, on the contrary get final product.

Those skilled in the art can be obvious, can carry out various modifications and variations and without departing from the spirit and scope of the present invention to above-mentioned exemplary embodiment of the present invention.Therefore, be intended to that the present invention is covered and drop in appended claims and the equivalence techniques scheme scope thereof to modification of the present invention and modification.

Claims (6)

1. a clamping device is characterized in that, comprising:

Drive oil cylinder;

Tooth bar is connected with described driving oil cylinder;

The first and second gears, be arranged at respectively described tooth bar both sides and with the engagement of described tooth bar; And

The first and second jaws, positioned opposite to each other, a side of described the first and second jaws is to mesh with described the first and second gears respectively with the band tooth limit of tooth limit and described the first and second jaws.

2. clamping device as claimed in claim 1 is characterized in that, described tooth bar moves back and forth along first direction under the driving of described driving oil cylinder.

3. clamping device as claimed in claim 2, it is characterized in that, the reciprocating motion of described tooth bar will drive described the first and second gears rotation, and then drive described the first and second jaws and move up in the second party vertical with described first direction, the moving direction of wherein said the first jaw and described the second jaw is respect to one another.

4. clamping device as claimed in claim 1 is characterized in that, a side respect to one another of described the first jaw and described the second jaw is an inner fovea part.

5. clamping device as claimed in claim 3 is characterized in that, also comprises:

Shell structure coats a part, tooth bar and first and second gears of described the first and second jaws.

6. clamping device as claimed in claim 5 is characterized in that, the inboard of described shell structure has a slide rail, moves up in described second party in order to guide described the first and second jaws.

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