CN102896151A

CN102896151A - Push rod push-and-pull device

Info

Publication number: CN102896151A
Application number: CN2012103668754A
Authority: CN
Inventors: 柏广杰; 杨为国; 梁建山; 赵旭东; 徐福昌
Original assignee: YANTAI BAOGANG STEEL PIPE CO Ltd
Current assignee: YANTAI BAOGANG STEEL PIPE CO Ltd; Yantai Baosteel Pipe Co Ltd
Priority date: 2012-09-28
Filing date: 2012-09-28
Publication date: 2013-01-30

Abstract

The invention discloses a push rod push-and-pull device which comprises an ejector rod (1). The push rod push-and-pull device is characterized in that an inner sleeve (2) is arranged in a tube of the ejector rod (1), a supporting block (3) is arranged outside the inner sleeve (2), the supporting block (3) and the inner wall of the tube of the ejector rod (1) are fixedly connected with each other, and a push rod (4) is arranged in the inner sleeve (2) and can be directly pushed and pulled in the inner sleeve (2). The push rod can be directly pushed and pulled in the inner sleeve, and the push rod can not be bent during processes of pushing and pulling so that the phenomenon that ejector heads fall down due to the fact that the push rod is not pushed and pulled in place during a production process is effectively avoided, qualities of gross tubes are improved, and simultaneously, rolling accidents are greatly reduced; and the push rod can rotate freely so that the push rod and a hydraulic cylinder in an ejector rod trolley can be conveniently connected, and replacing efficiencies of the ejector rod are greatly improved.

Description

A kind of push rod push-pull device at fixed

Technical field:

The present invention relates to technical field of metallurgical machinery, is a kind of push rod push-pull device at fixed specifically, have quick-replaceable top, quick locking top, prevent from coming directly towards come off, the function of quick-replaceable push rod.

Background technology:

At present, at the PQF of steel pipe's production process Hot Line, easily fall the top in the perforation procedure and come directly towards the not tight phenomenon, have a strong impact on rhythm of production, and production development accident very easily, be mainly reflected in the following aspects:

1, the push rod push-and-pull is not smooth: the push rod that uses at present, in push rod, add inner sleeve, and inner sleeve is welded on the push rod body, adds on the push rod to be supported on the inner push-and-pull of inner sleeve; In the actual production process, because frequent push-and-pull and the various production accident of push rod in inner sleeve, push rod easily bends, cause push rod push-and-pull position not in place, thereby cause the top to come off, or because the push rod rollback is not in place, cause the top can't lock and drop;

2, push rod is changed inconvenience: adopt flange connection because push rod is connected with the hydraulic cylinder of ejector rob trolley provided inside, therefore when changing push rod, need alignment flange, but the bending owing to push rod when alignment flange causes push rod to rotate at the push rod internal freedom, adpting flange is difficult to aim at, and affects rhythm of production.

Summary of the invention:

Order of the present invention is the deficiency that overcomes above-mentioned prior art, and a kind of push rod push-pull device at fixed is provided, and mainly solves the problem of easily falling top and top not tight phenomenon in the existing perforation procedure.

Technical scheme of the present invention is: a kind of push rod push-pull device at fixed, and it comprises push rod, its special character is to establish inner sleeve in the push rod body, inner sleeve peripheral hardware back-up block, back-up block is fixedly connected with the push rod inboard wall of tube body, establishes push rod in inner sleeve, directly push-and-pull in inner sleeve of push rod.

Wherein, described push rod and inner sleeve gap are 3.4mm, and push rod can freely rotate in inner sleeve.

Compared with the prior art a kind of push rod push-pull device at fixed of the present invention has outstanding substantive distinguishing features and marked improvement: 1, add the push-pull fashion that is supported in the inner sleeve on the cancellation push rod, adopting inner sleeve to add back-up block is fixed on the push rod body, on the push rod without back-up block, directly push-and-pull in inner sleeve of push rod, can not bend in the push rod push-and-pull process, that effectively avoids causing owing to the push rod push-and-pull is not in place in the production process come directly towards phenomenon, also greatly reduces the generation of rolling accident when improving quality of hollow billet; 2, when changing push rod, because push rod is free to rotate, so that being connected with the hydraulic cylinder of ejector rob trolley provided inside, push rod becomes convenient, greatly improve push rod and change efficient.

Description of drawings:

Fig. 1 is the structural representation of invention.

The specific embodiment:

For Comprehension and Implementation better, provide specific embodiment below in conjunction with accompanying drawing and describe the present invention in detail.

Embodiment 1, referring to Fig. 1, is processed into push rod 1, and inner sleeve 2 adds back-up block 3 and is welded on push rod 1 inboard wall of tube body, and push rod 4 is in inner sleeve 2 interior direct push-and-pulls, and push rod 4 is 3.4mm with inner sleeve 2 gaps, and push rod 4 can freely rotate inner sleeve 2 is interior.

A kind of push rod push-pull device at fixed of the present invention, during work, owing to do not weld support on the push rod, and directly push-and-pull in inner sleeve of push rod, push rod can be not crooked in the push-and-pull process; Push rod and interior inner room band gap, push rod can freely rotate in inner sleeve, and push rod is connected the convenience that becomes with the hydraulic cylinder of ejector rob trolley provided inside, and push rod is changed quick.

Claims

1. push rod push-pull device at fixed, it comprises push rod (1), it is characterized in that in push rod (1) body, establishing inner sleeve (2), inner sleeve (2) peripheral hardware back-up block (3), back-up block (3) is fixedly connected with push rod (1) inboard wall of tube body, establish push rod (4) in inner sleeve (2), push rod (4) is push-and-pull in inner sleeve (2) directly.

2. a kind of push rod push-pull device at fixed according to claim 1 is characterized in that described push rod (4) and inner sleeve (2) gap are 3.4mm.