CN1108986A - Chela-type pipe wrench - Google Patents

Abstract

The chela-type pipe wrench used as base wrench of hydraulic pipe wrench in oil well job or manual pipe wrench is composed of wrench head, body and handle. Workpiece is held by clippers on two curved levers connected to supporting base. The said wrench body has parallel main and boost axles. The said wrench handle is fixed to wrench body. The main axle is equipped with positioning disk, tension spring, nut and handle and boost axle is installed with brake spring, positioning sleeve, leading screw, conic cylindrical body, and handwheel.

Description

Chela-type pipe wrench

The present invention relates to a kind of pipe wrench, is a kind of general utility tool, the big chela of its retained part likeness in form crab, and clamp at the end that can be used as hydraulic tubing tong, is used for oilfield; Also can use as manual pipe wrench separately.

For many years, pincers at the bottom of used tubing tongs when workover treatment removes oil pipe on the oil field adopt the common manual pipe wrench of wafer type friction clamp mouth mostly, and in fact, this is a kind of substitute, does not also have special end pincers to be used for the production scene.Because common pipe wrench is the friction clamp mouth, its jaw occlusion portion is the plane, with contacting of oil pipe surface is the line contact, and contact area is little, lacks again in the binding clip effectively to clamp and locking gear, therefore, in when operation, be subjected to the effect of powerful torsional moment, jaw is often stung incessantly workpiece and is got loose, or skid and abrade tube wall, influenced operating efficiency widely.In addition, also,, do as easy as rolling off a log twisting off like this and clamp the palm and pliers is scrapped, cause economic loss so that " spraining " lives pipe because the operator tiltedly is stuck in pipe wrench on the oil pipe mistakenly.

The objective of the invention is to provide a kind of and can clamp fast, prevent to get loose, chela-type pipe wrench safe and convenient to use, the end of hydraulic tubing tong pincers can be used as manual general pipe wrench again when both can be used as the oil well operation.

The object of the present invention is achieved like this, and it is made of three parts binding clip, caliper and pincers.The function of binding clip is clamping, by the pincers palm, the pincers tooth, bent lever, push rod, roller, parts such as steel wire rope and binding clip housing constitute, the pincers palm is curved, inner surface is equipped with the pincers tooth, back fixation is on bent lever, two bent levers and push rod intersect at same point, fix with king-pin, wherein the middle part of the end of a bent lever and the bent lever of another root is fixed on the bearing, the middle part of push rod is fixed with king-pin, one end dress roller, the other end passes the binding clip housing and points to workpiece, overlap steel wire rope on the roller, one end of steel wire rope is fixed on the housing, and the other end is connected on the bearing, actuating system is arranged in the caliper and stop system mechanism, two axles are arranged in the caliper, parallel installation, one is main shaft, another root is for adding mechanical axis, one end of main shaft is fixed on the bearing, the other end stretches out outside the housing, and positioning disk is housed on the main shaft successively, tension spring, screw, handgrip adds mechanical axis below main shaft, tripping spring is housed on it successively, positioning sleeve, leading screw, the awl cylinder, handwheel, handwheel is contained in afterburning the tip of the axis, is exposed at outside the caliper screw coupling on leading screw and the main shaft, shell at caliper is equipped with lock pin near the handwheel place, is used for fixing to add mechanical axis.One end of pincers handle is fixed on the caliper, and the other end is a free end.

Chela-type pipe wrench proposed by the invention, because the pincers palms and pincers tooth are done camber, the outer surface contact-making surface of itself and pipe increases easier clamping work pieces greatly; Owing in caliper, designed the cover power transmission system mechanism of stopping, can drive main shaft and do laterally (axially) and move by rotating handwheel, thereby drive support movement, slap by bent lever pushing pincers, further tighten workpiece.

Accompanying drawing is exactly the structural representation according to chela-type pipe wrench proposed by the invention.

Among the figure, the bent lever (left side) of 1-, 2-clamps the palm, and 3-clamps tooth, 4-oil pipe, the bent lever (right side) of 5-, 6-connecting rod, 7-bearing, 8-positioning disk, 9-tension spring, the long flat key of 10-, 11-screw, 12-handgrip, 13-main shaft, 14-clamp handle, the 15-handwheel, 16-adds mechanical axis, the 17-lock pin, 18-bores post, 19-leading screw, the 20-positioning sleeve, 21-tripping spring, 22-caliper shell, 23-roller, 24-steel wire rope, the 25-push rod, 26-push rod roller, 27-binding clip housing, 28-king-pin.

Describe the concrete structure and the mechanism of foundation chela-type pipe wrench proposed by the invention in detail below in conjunction with drawings and Examples.

Accompanying drawing discloses a kind of " structure of the chela-type tubing tongs of oil pipe (end pincers) that can be used for 2 1/2.

Chela-type tubing tongs proposed by the invention is seen by binding clip, caliper and pincers from structure three parts is constituted.

The function of binding clip is clamping, by the pincers palm 2 and on pincers tooth 3 carry out, the pincers palm 2 cambers, adorn two arc pincers teeth 3 on it, the back and the bent lever 1 of the pincers palm 2,5 connect, the junction is rotatable, the middle part of bent lever 1 and the end of bent lever 5 intersect, other has the middle part of push rod 25 also to meet at same point with two bent levers, the intersection point part is fixed with king-pin, each is connected the end of bent lever 1 and the middle part of bent lever 5 with bearing with connecting rod 6, push rod roller 26 is equipped with in the lower end of push rod 25, and the upper end of push rod 25 is stretched out binding clip housing 27 and pointed to workpiece, also has steel cable 24 in the binding clip, the two ends of steel wire rope are separately fixed at the end of bearing 7 and binding clip housing 27, and steel wire rope 24 is enclosed within on the push rod roller 26 and walks around roller 23.

The major function of caliper is power transmission and the system of stopping, and is in the middle part of whole pipe wrench.Two parallel installations of axle are arranged in the caliper, and top is main shaft 13, and its end is fixed on the bearing 7, and positioning disk 8, tension spring 9, screw 11, handgrip 12 are installed on the main shaft from left to right successively, and long flat key 10 is arranged on the screw 11; Axle below main shaft is for adding mechanical axis 16, add tripping spring 21, positioning sleeve 20, leading screw 19, awl cylinder 18 and handwheel 15 are installed on the mechanical axis from left to right successively, handwheel 15 is contained in afterburning the tip of the axis, be exposed at outside the housing, (outside the housing) has breach near the axle of handwheel, near lock pin 17 being housed on the housing of handwheel, be used for preventing adding mechanical axis 16 and rotating.

Pincers are being a strip foundry goods, and an end is fixed on the caliper, and the other end is a free end.

The operating process of chela-type pipe wrench proposed by the invention is, at first rotate the handwheel 15 that adds on the mechanical axis 16, make the breach that adds on the mechanical axis facing to the operator, pulling adds the mobile backward segment distance of mechanical axis 16 then, promptly have lock pin 17 to be located automatically, to oil pipe, at this moment oil pipe 4 outer walls and push rod 25 collide pincers palm card, and force in the push rod 25 retraction holes, hitting under the power effect, push rod 25 pulling steel wire rope 24 and tension springs 9, main shaft 13 just moves, impel the pincers palm 2 to draw in, the pincers tooth is promptly bitten oil-pipe external wall, and this is " giving the clamping stage ", if clamping is firm inadequately, can promote handgrip 12 and be close to, make the pincers tooth further clamp tube wall.In order to make the pincers tooth more firm to the tube wall clamping, as long as turn handwheel 15, make the secondary action of leading screw-screw, pincers sound of baby talk point is carved in the tube wall dearly, this is " clamping stage ".For after preventing to loose one's grip, the pincers tooth unclamps voluntarily, must stir lock pin 17, then bore cylinder 18 under the effect of tripping spring 21, the awl post tightly cooperates, compresses with inner conical surface, has prevented the rotation of axle, has just checked main shaft, the pincers tooth just can not unclamp automatically, and operating personnel just can safely, fast and effeciently twist the operation of button or shackle.Behind the EO, need take off pliers, as long as backward rotation handwheel 15, during the notch alignment on adding mechanical axis oneself, two pincers palms promptly can unclamp tube wall automatically, and push rod 25 heads on pipe, and pliers is pushed to the outside, and pliers is promptly recessed open pipe.

Chela-type pipe wrench proposed by the invention is not limited only to the end pincers as hydraulic tubing tong, also can use as pipe wrench separately, but manual operation, effect is the same.This pipe wrench also can be used for departments such as machinery, chemical industry, building, communications and transportation, agricultural except being used for Ministry of Petroleum Industry outdoors, is a kind of instrument of versatility.

Claims (2)

1, a kind of chela-type pipe wrench, be is characterized in that constituting by binding clip, caliper and pincers,

A). the pincers palms (2) are arranged on the binding clip, pincers tooth (3), bent lever (1,5), push rod (25), roller (26), steel wire ropes (24) etc. constitute the binding clip clamper, the pincers palms (2) are curved, its inner surface is equipped with pincers tooth (3), the pincers palms (2) back respectively with bent lever (1,5) end is fixed with bearing pin, wherein the end of a bent lever (5) intersects with the middle part of the bent lever of another root (1), the end of the bent lever of the middle part of a bent lever (5) and another root (1) uses connecting rod (6) to be fixed on the bearing (7) respectively, the lower end dress roller (26) of push rod (25), the other end passes the sensing workpiece from the binding clip housing bore, push rod (25) middle part and two bent levers (1,5) same intersection point place is fixing with a king-pin (28), push rod roller (26) is gone up cover steel wire rope (24), one of steel wire rope is fixed on binding clip housing (27) top, and the other end is fixed on the bearing (7);

B). the axle of two parallel installations is arranged in the caliper, top axle is main shaft (13), the one end is fixed on the bearing (7), the other end stretches out outside the caliper, from bearing, positioning disk (8), tension spring (9), screw (11), handgrip (12) are installed on the main shaft (13) successively, following axle is for adding mechanical axis (16), tripping spring (21), positioning sleeve (20), leading screw (19), handwheel (15) are installed on the axle from left to right successively, handwheel (15) is outside housing, shell end also is equipped with lock pin (17), is used for preventing adding mechanical axis (16) and rotating;

C). pincers are (14) the strip foundry goods, and the one end is fixed on the caliper.

2, chela-type pipe wrench according to claim 1 is characterized in that leading screw (the 19)-screw (11) in the caliper mates mutually, and long flat key (10) is housed on the screw.

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