CN2618732Y - Expanding type pipe puller - Google Patents

Abstract

The utility model relates to an expansion type pipe drawing device, including a pull rod shaft (1), a distributed drawing claw (2), a spring retaining ring (3), a spring (4), a supporting sleeve (5), a screw rod (6), a connection sleeve (7), a bearing (8), a nut (9), an adapter bar (10) and other parts, which is characterized in that: the front end of the pull rod shaft (1) is conical, and the back-end thereof is connectedly fixed with the screw rod (6) ; the distributed drawing claw (2) is wrapped on the pull rod shaft (1), the front end thereof is divided into a plurality of sub-claws, the surface is provided with notched teeth, the middle part is nested with the spring retaining ring (3), and the end is connected with the screw rod (6) through the spring (4) ; the supporting sleeve (5) is wrapped out of the distributed drawing claw (2) and is connectedly fixed with the connection sleeve (7) ; the connection sleeve (7) is embeddedly connected with the intracavity of the nut (9), the bearing (8) is installed between the contact surface; the inner surfaces of the connection sleeve (7) and the nut (9) are provided with internal thread and are meshed with the screw rod (6), the end of the screw rod (6) is installed with the adapter bar (10). The beneficial effects of the utility model are that the structure is simple and the cost is low, and the drawing process is shorten due to the combination with machine tools, the work efficiency is greatly improved, and the labor intensity is reduced too.

Description

The expansion type pipe extractor

Technical field: the utility model relates to replacing, the repair outfit that is used for all kinds of heat exchanger metal tubes, exactly is a kind of expansion type pipe extractor.

Background technology: the heat radiating metal pipe of installing on the pressure vessel end plate often needs to change because of corroding, and generally is to take off the pipe that has damaged by the method for artificial employing cutting, changes new pipe again.Chang Yi damages the pipe hole on the end plate or makes its distortion and influence the sealing of container in operating process.I applied on November 28th, 2000, Chinese patent ZL00261729.3, the patent of a kind of pipe extractor by name, its technical scheme comprises parts such as positioning screw, splicing sleeve, thrust bearing and afterburning nut, it is characterized in that the positioning screw front portion is Rotary-table, be provided with notched teeth outside it, the rear portion is for being with externally threaded cylinder, afterburning nut is adorned thereon, and end is positive tetragonal body; Splicing sleeve is twisted and to be placed in outside the positioning screw, is embedded in afterburning nut intracavity by the check ring of end, between splicing sleeve and afterburning nut contact-making surface the rolling thrust bearing is housed.The advantage of this utility model is reasonable in design, and is simple in structure, thereby reduces the friction between workpiece effectively, and tube drawing efficient significantly improves, and laborsaving, save time, easy to use.But this patent still needs operating personnel's manual operations, so process is still longer, and operating efficiency is high not enough, and only is applicable to the metal tube of single model, uses inconvenience.

Summary of the invention: the purpose of this utility model exactly in order to address the above problem, to provide a kind of and can be used the expansion type pipe extractor that adaptability is good, efficient is higher with electronic drawbench.

Technical solution of the present utility model is: the expansion type pipe extractor, comprise parts such as pull rod shaft, split pusher dog, spring flange, spring, splicing sleeve, screw rod, adapter sleeve, bearing, nut, pin, extension bar, it is characterized in that: described pull rod shaft front end is conical, and rear end and screw rod are connected and fixed; The split pusher dog is enclosed within on the pull rod shaft, and front end is divided into several claws, and the surface is provided with notched teeth, and mid portion is nested with spring flange, and end is connected with screw rod by spring; Splicing sleeve is placed in outside the split pusher dog, and is connected and fixed with adapter sleeve; Adapter sleeve is embedded in nut intracavity, and bearing is housed between contact-making surface; The inner surface of adapter sleeve and nut is provided with internal thread, and with screw engages, the screw rod end is equipped with extension bar.

The utility model is matching used with electronic drawbench, during use the insertion of split pusher dog is treated in tube drawing, by electronic drawbench rotation nut, drive screw rod and pull rod shaft rectilinear motion backward, because the effect of spring, the split pusher dog is pushed to pull rod shaft cone-shaped nose place, thereby the claw of split pusher dog is opened, and metal tube is clenched by its surperficial notched teeth, continue the rotation nut, screw rod drives pipe rectilinear motion backward together, thereby metal tube is extracted from plate hole.Last reverse rotation nut, pull rod shaft moves forward, and the split pusher dog withstands owing to being supported cover, separates with the pull rod shaft cone-shaped nose, and claw shrinks under the spring flange effect, can take off pipe extractor from pipe.Compare with original technology, the utility model is installed and used efficient and convenient, and it is artificial to use machine tool to replace, and operating efficiency has obtained large increase, and pull rod shaft and split pusher dog can change model as required in addition, to adapt to the pipe of different thicknesses.

The beneficial effects of the utility model are simple in structure, and cost is low, owing to use together in conjunction with machine tool, have shortened the tube drawing process, have greatly improved operating efficiency, have also reduced labour intensity simultaneously.

Description of drawings: Fig. 1 is a structural representation of the present utility model,

1. pull rod shaft 2. split pusher dogs 3. spring flanges 4. springs 5. splicing sleeves 6. screw rods 7. adapter sleeves 8. bearings 9. nuts 10. extension bars

The specific embodiment: referring to Fig. 1, the expansion type pipe extractor that the utility model relates to, comprise parts such as pull rod shaft 1, split pusher dog 2, spring flange 3, spring 4, splicing sleeve 5, screw rod 6, adapter sleeve 7, bearing 8, nut 9, extension bar 10, it is conical that pull rod shaft 1 front end is, and rear end and screw rod 6 are connected and fixed; Split pusher dog 2 is enclosed within on the pull rod shaft 1, and front end is divided into 4 claws, and the surface is provided with notched teeth, and mid portion is nested with spring flange 3, and the terminal spring 4 that passes through is connected with screw rod 6; Splicing sleeve 5 is placed in outside the split pusher dog 2, and is connected and fixed with adapter sleeve 7; Adapter sleeve 7 is embedded in nut 9 inner chambers, and bearing 8 is housed between contact-making surface; Adapter sleeve 7 is provided with internal thread with the inner surface of nut 9, and with screw rod 6 engagements, screw rod 6 ends are equipped with extension bar 10.

Claims (1)

1. the utility model relates to the expansion type pipe extractor, comprise pull rod shaft (1), split pusher dog (2), spring flange (3), spring (4), splicing sleeve (5), screw rod (6), adapter sleeve (7), bearing (8), nut (9), extension bar parts such as (10), it is characterized in that: described pull rod shaft (1) front end is conical, and rear end and screw rod (6) are connected and fixed; Split pusher dog (2) is enclosed within on the pull rod shaft (1), and front end is divided into several claws, and the surface is provided with notched teeth, and mid portion is nested with spring flange (3), and the terminal spring (4) that passes through is connected with screw rod (6); Splicing sleeve (5) is placed in outside the split pusher dog (2), and is connected and fixed with adapter sleeve (7); Adapter sleeve (7) is embedded in nut (9) inner chamber, and bearing (8) is housed between contact-making surface; Adapter sleeve (7) is provided with internal thread with the inner surface of nut (9), and with screw rod (6) engagement, screw rod (6) end is equipped with extension bar (10).