CN201010471Y

CN201010471Y - Hanging tongs lifting hand winch

Info

Publication number: CN201010471Y
Application number: CNU2007200955836U
Authority: CN
Inventors: 潘以恒
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-26
Filing date: 2007-03-26
Publication date: 2008-01-23
Anticipated expiration: 2017-03-26

Abstract

A hoisting tong elevating hand winch belongs to workover mechanical field and comprises a crank, a worm wheel speed reducing machine, a drum, a bearing and a frame; wherein the frame consists of a back plate and two suspension arm beams which is vertical to the back plate; the worm wheel speed reducing machine and the bearing are respectively fixedly connected with the two suspension arm beams of the frame; a worm shaft of the worm wheel speed reducing machine points toward the back plate of the frame; the utility model also comprises a ratchet and pawl mechanism; the ratchet is united with the drum as a whole; a hinge pedestal of a pawl is fixed on the back plate of the frame. The utility model has the advantages that the hoisting tong elevating hand winch can be conveniently arranged in a well frame and be controlled by the operator out of the well frame; the hoisting tong can be elevated and positioned accurately; moreover, the utility model also has the advantages of anti-fall, safety and reliability.

Description

Tongs lifting crab winch

(1) technical field

The utility model belongs to the well workover mechanical field, relates to a kind of crab winch device, especially for the crab winch device of adjusting heavy pipe wrench, hydraulic power tongs height.

(2) background technology

Be suspended in well head, be used for heavy pipe wrench, the hydraulic power tongs of emptying pipe thread, we are referred to as tongs to them usually.In remedial work, the height of tongs need be done to adjust up and down along with the change of well head construction height.Patent CN00210959 " well workover hydraulic tongs height adjuster " has proposed a kind of system's formation scheme of surging and defeating the pincers height with the crab winch adjustment, and its weak point is:

1. this scheme does not provide the concrete mounting structure of winch and derrick, and winch is mounted in outside the interior still derrick of derrick, being mounted in rig front still is the derrick side, and whether the trend that not only has influence on lifting rope interferes with derrick, and has influence on the working environment and the construction safety of well head.

2. the little capstan winch (cylinder) of this scheme is by the plunging joint bonded assembly with being connected of worm-and-wheel gear (worm reduction gear), and this connection mode structure is complicated, and the winch overall dimension is strengthened, and is unfavorable for that winch installs in derrick.

3. worm-and-wheel gear is not under any circumstance all to be self-locking, when the transmitting ratio of worm-and-wheel gear hour, this mechanism can not self-locking.This scheme relies on the worm reduction gear self-locking merely, can not guarantee winch lifting safety, the tongs accurate positioning.

(3) technology contents

The purpose of this utility model is: the first, a kind of compact conformation is provided, and can be installed in the derrick, again the crab winch device that can outside derrick, handle.The second, a kind of crab winch device that the positive lock function is arranged is provided.

The purpose of this utility model is achieved in that a kind of tongs lifting crab winch, contain crank, worm reduction gear, cylinder, bearing, and frame, crank is captiveed joint with the worm shaft of worm reduction gear, the worm-wheel shaft of worm reduction gear is connected by the end of key with the axle of cylinder, the other end of the axle of cylinder and the endoporus of bearing are connected, it is characterized in that: frame by backboard and with it two cantilever beams of vertical layout constitute, worm reduction gear and bearing are fixedly connected on respectively on two cantilever beams of frame, and the worm shaft of worm reduction gear points to the backboard direction of frame.

The utility model can also contain ratchet and pawl arrangement, and a tube limit of ratchet and cylinder constitutes one, and the hinge seat of ratchet is fixed on the backboard of frame.

Because the axle of cylinder is connected by key with the worm-wheel shaft of worm reduction gear, has saved plunging joint, can make the simpler compactness of structure of the present utility model.

Because pointing to the backboard direction of frame, the worm shaft of worm reduction gear is connected with the cantilever beam of frame, can be fixedly connected on by backboard on the derrick legs frame, crab winch is installed in derrick inside, the worm shaft of worm reduction gear is reached outside the derrick, make things convenient for the workman to handle winch at derrick external application crank.The advantage that winch is installed in the derrick is: lifting rope does not interfere with derrick and just can walk around the fixed pulley that hangs on the derrick and remove to hang tongs; Winch does not occupy the space that the outside workman of derrick works, and helps construction safety.

Owing to contain ratchet and pawl arrangement, can the utility model can be selected the worm reduction gear of any transmitting ratio, self-locking and needn't rely on worm reduction gear.Ratchet and pawl arrangement can be guaranteed cylinder unidirectional locking under the load effect, thus accurate positioning when guaranteeing hoisting heavy can not fall, safe and reliable.

(4) description of drawings

The following drawings is scheme drawing.

Fig. 1 sees that in derrick the utility model is installed in the front view of derrick one side;

Fig. 2 is the lateral plan after the utility model drum segment is analysed and observe from the A-A section, and with the installation of derrick relation;

Fig. 3 sees that outside derrick the utility model is installed in the erection plan of derrick one side, and crank does not draw among the figure;

Among the figure: 1. derrick, 2. backboard, 3. bolt, 4. worm reduction gear, 5. worm-wheel shaft, 6. key, 7. cylinder, 8. axle, 9. bearing, 10. frame, 11. screws, 12. ratchets, 13. cantilever beams, 14. ratchets, 15. pull bar, 16. swing handles, 17. hinge seats, 18. cranks, 19. worm shafts, 20. connecting panels.

(5) concrete enforcement

Below in conjunction with accompanying drawing the utility model is specifically described.

As shown in Figure 1: a kind of tongs lifting crab winch, contain crank 18, worm reduction gear 4, cylinder 7, bearing 9 and frame 10, they all are total members.The worm shaft 19 of worm reduction gear 4 cooperates by polygon shaft, hole with crank 18, also can form a fixed connection by key, pin.The worm-wheel shaft 5 of worm reduction gear 4 is connected by the end of key 6 with the axle 8 of cylinder, and the other end of the axle 8 of cylinder and the endoporus of bearing 9 are connected.Frame 10 is a steel construction piece, by backboard 2 and with it two cantilever beams 13 of vertical layout constitute.Worm reduction gear 4 and bearing 9 can be by being threaded, as screw 11, or welding manner, being fixedly connected on respectively on two cantilever beams 13 of frame, the worm shaft 19 of worm reduction gear points to backboard 2 directions of frames 10.

As shown in Figure 2, tongs lifting crab winch can also contain ratchet and pawl arrangement, and this mechanism also is total member, and ratchet 12 can directly be produced on the tube limit of cylinder 7, constitutes one with cylinder 7.With the hinge seat 17 of ratchet 14 hinges can be by on the welding or the backboard 2 that is fixed on frame 10 that is threaded.Arrow among Fig. 2 is represented the trend of lifting rope, and when cylinder 7 twined lifting ropes, ratchet 14 can slip on ratchet 12, allows cylinder 7 freely rotate, when cylinder 7 is dragged contrarotation by lifting rope, and ratchet 14 whereabouts latch ratchets 12.In practical structures, also have pull back spring mechanism on the ratchet, guarantee that the ratchet locking is reliable.。

As Fig. 1 or shown in Figure 2, above-mentioned ratchet and pawl arrangement can also further contain pull bar 15, and an end of pull bar and ratchet 14 hinges, the other end of pull bar 15 pass the backboard 2 of frame and swing handle 16 hinges of top bump.When needs are transferred tongs, will swing handle 16 and rotate to level attitude, its top bump is withstood the backboard 2 of frame, drives pull bar 15 translations, and ratchet 14 is lifted from the position of latch ratchet, and cylinder 7 just can contrarotation, loosens lifting rope, has transferred tongs.

The utility model is installed in derrick inside usually, on the derrick legs of derrick side, and multiple method of attachment can be arranged.As shown in Figure 1, derrick is the angle steel welded structure, can be connected with derrick 1 with the backboard 2 of bolt 3 with frame.As shown in Figure 2, also the backboard 2 of frame directly can be welded on the derrick 1.Can also be connected with connecting panel 20 with the backboard 2 of bolt 3 earlier as shown in Figure 3, again with connecting panel 20 and derrick 1 welding frame.The benefit of this connection mode is: the size of frame 10 is unified, is convenient to produce, and by adjusting the width of connecting panel 20, adapts to the derrick of different size.Can also lay down tie bolt 3 when needed, the utility model is disassembled from derrick 1.

Claims

1. tongs lifting crab winch, contain crank (18), worm reduction gear (4), cylinder (7), bearing (9), and frame (10), crank (18) is captiveed joint with the worm shaft (19) of worm reduction gear (4), the worm-wheel shaft (5) of worm reduction gear (4) is connected by the end of key (6) with the axle (8) of cylinder (7), the other end of the axle (8) of cylinder (7) and the endoporus of bearing (9) are connected, it is characterized in that: frame (10) by backboard (2) and with it two cantilever beams (13) of vertical layout constitute, worm reduction gear (4) is fixedly connected on respectively on two cantilever beams (13) of frame (10) with bearing (9), and the worm shaft (19) of worm reduction gear (4) points to backboard (2) direction of frame (10).

2. tongs lifting crab winch according to claim 1, it is characterized in that: can also contain ratchet and pawl arrangement, ratchet (12) constitutes one with a tube limit of cylinder (4), and the hinge seat (17) of ratchet (14) is fixed on the backboard (2) of frame (10).

3. tongs lifting crab winch according to claim 2, it is characterized in that: described ratchet and pawl arrangement can also contain pull bar (15), one end of pull bar and ratchet (14) hinge, the other end of pull bar pass the backboard (2) of frame (10) and swing handle (16) hinge of top bump.