CN214441853U

CN214441853U - Push-pull device for dismounting and mounting metallurgical equipment and welded pipe rolling mill

Info

Publication number: CN214441853U
Application number: CN202120277384.7U
Authority: CN
Inventors: 蒋龙; 刘红光; 唐皓
Original assignee: Zhangjiagang Zhongyue Metallurgical Equipment Technology Co ltd
Current assignee: Zhangjiagang Zhongyue Metallurgical Equipment Technology Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-10-22
Anticipated expiration: 2031-01-29

Abstract

The invention discloses a push-pull device for dismounting and mounting a metallurgical device and a welded pipe rolling mill, which comprise a mounting seat and a metallurgical device base, wherein the mounting seat is mounted on one side of the metallurgical device base; the transmission mechanism is provided with a pull rod, the pull rod is parallel to the metallurgical equipment, one end of the pull rod close to the metallurgical equipment is provided with a clamping part, and the clamping part is provided with a bulge or a groove in a radial direction around the pull rod; the metallurgical equipment is provided with a clamping seat, an open clamping groove is arranged on the clamping seat, and the opening of the clamping groove is arranged on an arc which takes the rotating seat as the center of a circle and takes the rotating seat to the clamping seat as the radius. The connecting device has the advantages of simple structure, convenience in manufacturing, low manufacturing cost, simplicity and convenience in realizing the connection between the push-pull device and the outer housing of the welded tube rolling mill, and pulling out or pushing in the push-pull device from a fixed station, energy and labor intensity are saved, the reliability is high, and the working efficiency is greatly improved.

Description

Push-pull device for dismounting and mounting metallurgical equipment and welded pipe rolling mill

Technical Field

The invention belongs to the technical field of metallurgical mechanical equipment, and particularly relates to a push-pull device for dismounting and mounting metallurgical equipment and a welded pipe rolling mill, which are used for dismounting and mounting an outer housing of the welded pipe rolling mill.

Background

Welded steel pipes are generally called welded pipes and are made by welding steel plates or steel strips after they are formed by crimping. The processing technology of the welded pipe with the smaller diameter is usually unwinding of band steel → bilateral deburring → primary forming → fine forming → welding → removal of inner and outer welding beads → primary sizing → eddy current inspection → heat treatment → sizing straightening → polishing, and finally the processed steel pipe is cut to length to obtain the finished welded pipe. The welded pipe rolling mill is an important device in the initial forming and fine forming stages of the welded pipe. When the welded pipe rolling mill is used for manufacturing products of different pipe types, an original mold in the outer housing is required to be detached, and a new mold is required to be installed. The traditional disassembly and assembly mode is manual disassembly and assembly, the welded tube rolling mill is arranged by a plurality of welded tube rolling mills along the movement direction of strip steel, and because the outer housing windows are heavy, and the rollers need to be pulled out from bearing seats on the outer housing windows, the outer housing windows are very laborious to pull out and push back from the directions parallel to the rollers, and a large amount of time and labor are needed. In the prior art, in order to facilitate the pulling out and pushing back of the outer housing of the welded tube rolling mill, various pushing and pulling devices have been developed by those skilled in the art.

The Chinese patent application, application number CN201420689500.6, application date 2014.11.17, No. CN204262061U, No. 2015.04.15 discloses a push-pull mechanism for disassembling and assembling an outer housing of a welded tube rolling mill, which comprises a mounting seat connected with a base of the welded tube rolling mill, wherein a lead screw penetrates through the mounting seat in a rotating manner, bearing seats are respectively arranged at two sides of the lead screw close to end positions, a walking bottom plate is connected between the two bearing seats, a motor is arranged at one end of the walking bottom plate, a motor output shaft is connected with the end of the lead screw penetrating out of the bearing seats through a belt and a belt pulley, and a connecting device connected with the housing is arranged at the other end of the walking bottom plate. The connecting device is a pull pin matched with the connecting hole on the memorial archway. After the push-pull mechanism is adopted, the bolts for fixing the outer memorial archways are only manually disassembled, the connecting device is connected with the outer memorial archways, and the outer memorial archways can be automatically disassembled under the action of the push-pull mechanism; when the outer memorial archways are installed, the outer memorial archways are pushed in by the mechanism.

The Chinese patent application, application No. CN201921516582.3, application date 2019.09.12, No. CN211134961U, No. 2020.07.31 discloses a push-pull device for disassembling and assembling an outer housing of a welded tube rolling mill, which comprises a mounting seat and a welded tube rolling mill base, wherein the mounting seat is arranged on one side of the welded tube rolling mill base along the forward direction of strip steel; the device is characterized in that a bottom plate is arranged on a mounting seat, a gear box is arranged on one side of the bottom plate, which is far away from a base of a welded pipe rolling mill, a gear mandrel, a gear and a rack are arranged in the gear box, the gear mandrel is rotationally connected with the gear box, and one end of the gear mandrel extends out of the gear box; the gear penetrates through the gear mandrel; the rack is meshed with the gear, one end of the rack extends out of the gear box, and the tail end of the rack is provided with a connecting mechanism connected with the outer memorial archway. The connecting mechanism is a pull pin matched with the connecting hole on the outer housing.

Regarding the connecting device or connecting mechanism for connecting the outer housing on the push-pull device, the prior patent documents disclose roll-changing hooks and automatic connecting mechanism components, for example, chinese patent application, application No. CN201520166209.5, application date 2015.03.24, grant publication No. CN204602811U, grant publication date 2015.09.02, and disclose an automatic connecting mechanism and roll-changing system for roll changing of a roll, which are used for connecting the roll and the roll-changing device, the roll is provided with a roll-changing hook, the automatic connecting mechanism includes a hook, a hook resetting structure and a hook jacking structure, the hook resetting structure includes a bracket arranged on the roll-changing device and a resetting component arranged on the bracket, the bottom of the bracket is provided with a hinged piece, the hinged piece is hinged with the hook through a hinged shaft, and the resetting component is contacted with the top of the hook.

The above patent application is the push-and-pull structure that the memorial archway was commonly used outside the welded tube rolling mill, though above-mentioned technical scheme can greatly save the manpower, still there is some not enough: 1. a push-pull mechanism for dismounting an outer housing of a welded tube rolling mill and a push-pull device for dismounting the outer housing of the welded tube rolling mill use a lead screw or a rack as a push-pull transmission carrier, the lead screw or the rack moves in a direction parallel to a roller, one end far away from a connecting device or the connecting mechanism can exceed an installation seat and occupy passageway space in a workshop, if the lead screw or the rack occupies passageway space in the workshop when the outer housing of the non-rolling mill is not in push-pull operation, operators can cause bruising accidents if the lead screw or the rack is not careful, and certain potential safety hazards are generated; 2. the roller changing hook and the automatic connecting mechanism assembly are adopted, the manual or extra power energy is not needed to be involved, the energy and labor intensity are saved, the operation is simple and convenient, the reliability is high, but the push-pull device is not a core part of a welded tube rolling mill, the roller changing hook and various parts related to the automatic connecting mechanism assembly are multi-position non-standard parts, a manufacturer carries out self-processing, a plurality of outer memorial archways on one set of welded tube rolling mill need to be manufactured in a unified specification, the production cost of whole equipment is increased, in addition, the roller changing hook, the automatic connecting mechanism and connecting mechanisms are worn and torn after being used for multiple times, the connecting failure is caused, and the outer memorial archways cannot be pulled out smoothly by utilizing the push-pull device.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problem that in the prior art, a lead screw or a rack is adopted as a push-pull transmission carrier for a welded pipe rolling mill external housing window push-pull device, the lead screw or the rack moves in a direction parallel to a roller, one end far away from a connecting device or a connecting mechanism can exceed an installation seat and occupy passageway space in a workshop, if the lead screw or the rack occupies the passageway space in the workshop during non-push-pull operation of a non-rolling mill external housing window, operators cannot pay attention to the situation and can cause bruise accidents, and certain potential safety hazards are generated; the invention aims to provide a push-pull device and a welded tube rolling mill for dismounting metallurgical equipment, which have simple structure, convenient manufacture and low manufacturing cost, are convenient and quick to realize the connection between the push-pull device and the welded tube outer housing workshop by means of simple operation of operators, save energy and labor intensity, have high reliability and greatly improve the working efficiency, the device can rotate according to the use requirement, and the operation of receiving and releasing is carried out, avoids the outstanding motion that hinders the staff of rack, eliminates the potential safety hazard that push-and-pull device brought.

2. Technical scheme

In order to achieve the purpose and achieve the technical effect, the invention adopts the following technical scheme:

a push-pull device for dismounting metallurgical equipment comprises a mounting seat and a metallurgical equipment base, wherein the mounting seat is mounted on one side of the metallurgical equipment base, and a base is arranged on the mounting seat; the transmission mechanism is provided with a pull rod, the pull rod is parallel to the metallurgical equipment, one end of the pull rod, which is close to the metallurgical equipment, is provided with a clamping part, and the clamping part is provided with a bulge or a groove in a radial direction around the pull rod; the metallurgical equipment is provided with a clamping seat, the clamping seat is provided with an open clamping groove, and the opening of the clamping groove is arranged on an arc which takes the rotating seat as the center of a circle and takes the rotating seat to the clamping seat as the radius.

In a specific embodiment of the invention, a first running mechanism is arranged between the mounting seat and the base; the first walking mechanism comprises a linear track and a sliding block, and the linear track is arranged on the mounting seat along the forward direction of the strip steel; the sliding block is connected with the linear track; and a supporting plate is arranged between the sliding block and the base, and the supporting plate is connected with the sliding block and the base through a plurality of bolts respectively.

In a specific embodiment of the invention, a first connecting key is also arranged between the supporting plate and the base.

In a specific embodiment of the present invention, two linear tracks are arranged in parallel, and each linear track is provided with a corresponding slide block.

In a specific embodiment of the invention, the base is provided with guide strips, and the guide strips are respectively arranged at two sides of the base and used for guiding the metallurgical equipment when the metallurgical equipment is pulled out or pushed back.

In a specific embodiment of the invention, a second running mechanism is arranged between the mounting seat and the base, and the second running mechanism comprises a hanging plate, a pressing plate, a supporting plate and a deep groove ball bearing; the hanging plate is arranged on one side, close to the metallurgical equipment base, of the bottom base; one end of the pressing plate is connected with the mounting seat, the other end of the pressing plate is arranged in a hanging manner, and a supporting plate is arranged below the hanging end of the pressing plate; the deep groove ball bearing is arranged between the pressing plate and the supporting plate and is connected with the hanging plate through a pin shaft; the pin shaft is connected with the hanging plate through a safety cover and a screw; the lifting plate is provided with a jackscrew, and a rod body of the jackscrew is abutted against the pin shaft.

In a specific embodiment of the present invention, a jack screw is disposed on the hanging plate, and a rod body of the jack screw abuts against the pin shaft. In a specific embodiment of the invention, the transmission mechanism is a gear box, a gear mandrel and a gear are arranged in the gear box, the gear is sleeved on the gear mandrel, two ends of the gear mandrel are rotatably connected with the gear box, one end of the gear mandrel extends out of the gear box and is connected with a wrench or a hand wheel, and the gear mandrel is rotated by the wrench or the hand wheel to drive the gear to rotate; the surface of the pull rod is provided with a rack along the axial direction, the rack extends into the gear box to be meshed with the gear, and the rotation of the gear further drives the rack meshed with the gear to move along the axial direction.

In a specific embodiment of the invention, the pull rod is a walking bottom plate, and the transmission mechanism comprises a lead screw and a motor; the bottom of the pull rod is connected with the upper end of the rotating seat; the lead screw both sides are close to the tip position and are equipped with the bearing frame respectively, connect the pull rod between two bearing frames, the one end of pull rod is equipped with the motor, the motor output shaft is connected with the tip that the lead screw wore out the bearing frame through belt and belt pulley, the one end that the pull rod is close to metallurgical equipment sets up joint portion.

The invention also aims to provide a welded pipe rolling mill which is characterized by comprising a welded pipe rolling mill body and the push-pull device for dismounting the metallurgical equipment.

The invention also aims to provide a method for disassembling and assembling metallurgical equipment, which is characterized by comprising the following steps:

A. disassembling: the pull rod of the push-pull device for dismounting the metallurgical equipment rotates around the rotating seat, the clamping part of the pull rod enters from the opening of the clamping groove in the rotating process, and the transmission mechanism drives the pull rod to move so as to pull out the metallurgical equipment from the metallurgical equipment base;

B. installation: the pull rod of the push-pull device for dismounting the metallurgical equipment rotates around the rotating seat, the clamping part of the pull rod enters from the opening of the clamping groove in the rotating process, the transmission mechanism drives the pull rod to move, and the near end of the transmission mechanism of the metallurgical equipment is pushed back to the base of the metallurgical equipment.

3. Advantageous effects

Compared with the prior art, the invention has the beneficial effects that: the rotatable transmission mechanism is arranged, and through rotation of the transmission mechanism, a pull rod of the transmission mechanism is prevented from occupying the passageway space of a workshop when not in use, so that safety accidents are avoided; the transmission mechanism is rotatably combined with the clamping seat arranged on the metallurgical equipment, so that a temporary connection structure between the transmission mechanism and the metallurgical equipment is simplified, the connection mode is simple and reliable, the corresponding parts have simple structures, finish machining is not needed, and the abrasion of the functional structure after long-term use is easy to repair; the transmission mechanism adopts simple structures such as a purely mechanical gear box and the like, the weight is light, the manufacturing cost is low, the pull rod is a rack, the pull rod can be taken out of the transmission mechanism through the rotation of the transmission mechanism, the installation is convenient, the disassembly, the push and pull actions of the outer housing can be realized by adopting a manual mode, the movement in the direction of a welded tube rolling mill is free, and the labor is saved; the transmission mechanism adopts mechanical transmission of a motor and a lead screw, only the bolt for fixing the outer housing is needed to be manually removed, the clamping part is connected with the clamping groove, and the metallurgical equipment can be automatically removed under the action of the push-pull device; when in installation, the metallurgical equipment is pushed in by the mechanism; the whole process improves the degree of mechanization, reduces the labor and time, and greatly improves the production efficiency.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of

embodiments

1 and 3 of the present invention.

FIG. 2 is a schematic view of the structure of the card socket of the present invention.

Fig. 3 is a schematic structural diagram of embodiment 4 of the present invention.

Fig. 4 is a schematic structural diagram of a transmission mechanism in embodiment 3 of the invention.

In the figure: 1-mounting a base; 2-metallurgical equipment; 3-a metallurgical equipment base; 4-a base; 5-a rotating seat; 6-a pull rod; 7-a clamping part; 8-a clamping seat; 9-a clamping groove; 10-a linear track; 11-a slide block; 12-a supporting plate; 13-a bolt; 14-a hanger plate; 15-pressing plate; 16-a support plate; 17-deep groove ball bearing; 18-a pin shaft; 19-a gearbox; 20-a gear spindle; 21-a gear; 22-a rack; 24-a lead screw; 25-a motor; 26-a bearing seat; 27-a belt; 28-a belt pulley; 29-a guide bar; 30-a first connecting bond; 31-top thread.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the invention.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A welded pipe rolling mill is characterized by comprising a welded pipe rolling mill body and a push-pull device for dismounting and mounting metallurgical equipment. The metallurgical plant is a welded tube rolling mill, which includes an outer housing and a roller for forming a steel strip, and the push-pull device for assembling and disassembling the metallurgical plant is described with reference to the following example.

Example 1

As shown in fig. 1, a push-pull device for dismounting and mounting a metallurgical equipment comprises a mounting seat 1 and a metallurgical equipment base 3, wherein the mounting seat 1 is mounted on one side of the metallurgical equipment base 3, and a base 4 is arranged on the mounting seat 1, and the push-pull device is characterized in that a rotating seat 5 and a transmission mechanism are arranged on the base 4, one end of the rotating seat 5 is connected with the base 4, and the other end of the rotating seat is connected with the transmission mechanism; a pull rod 6 is arranged on the transmission mechanism, the pull rod 6 is parallel to the metallurgical equipment 2, one end of the pull rod 6 close to the metallurgical equipment 2 is provided with a clamping part 7, and the clamping part 7 is a bulge or a groove which is radially arranged around the pull rod 6; set up joint seat 8 on metallurgical equipment 2, set up open-ended joint groove 9 on the joint seat 8, the opening setting of joint groove 9 is using roating seat 5 as the centre of a circle, and roating seat 5 is on the circular arc of radius to joint seat 8.

The transmission mechanism is a gear box 19, a gear mandrel 20 and a gear 21 are arranged in the gear box 19, the gear 21 is sleeved on the gear mandrel 20, two ends of the gear mandrel 20 are rotatably connected with the gear box 19, one end of the gear mandrel 20 extends out of the gear box 19 and is connected with a wrench or a hand wheel, and the gear mandrel 20 is rotated through the wrench or the hand wheel to drive the gear 21 to rotate; the surface of the pull rod 6 is provided with a rack 22 along the axial direction, the rack 22 extends into the gear box 19 to be meshed with the gear 21, and the rotation of the gear 21 further drives the rack 22 meshed with the gear 21 to move along the axial direction.

Example 2

As shown in fig. 4, on the basis of embodiment 1, the transmission mechanism and the pull rod can be designed in a modified manner, and the specific design scheme is as follows: the pull rod 6 is a walking bottom plate, and the transmission mechanism comprises a lead screw 24 and a motor 25; the bottom of the pull rod 6 is connected with the upper end of the rotating seat 5; the positions of the two sides of the screw rod 24, which are close to the end parts, are respectively provided with a bearing seat 26, the pull rod 6 is connected between the two bearing seats 26, one end of the pull rod 6 is provided with a motor 25, the output shaft of the motor 25 is connected with the end part of the screw rod 24, which penetrates out of the bearing seats 26, through a belt 27 and a belt pulley 28, and one end of the pull rod 6, which is close to the metallurgical equipment 2, is provided with a clamping part 7.

Example 3

As shown in fig. 1, in the technology of embodiment 1 or embodiment 2, a movable push-pull device for dismounting and mounting a metallurgical equipment is provided, wherein a first running mechanism is arranged between a mounting seat 1 and a base 4; the first walking mechanism comprises a linear track 10 and a slide block 11, wherein the linear track 10 is arranged on the mounting seat 1 along the advancing direction of the strip steel; the slide block 11 is connected with the linear track 10; a supporting plate 12 is arranged between the sliding block 11 and the base 4, and the supporting plate 12 is connected with the sliding block 11 and the supporting plate 12 and the base 4 through a plurality of bolts 13 respectively.

A first connecting key 30 is also arranged between the bracing plate 12 and the base 4.

The base 4 is provided with guide strips 29, the guide strips 29 are respectively arranged on two sides of the base 4, and the guide strips 29 are connected with the base 4 through bolts to provide guidance when the metallurgical equipment 2 is pulled out or pushed back.

One or two linear tracks 10 are arranged in parallel, and each linear track 10 is correspondingly provided with a slide block 11.

Example 4

As shown in fig. 3, on the basis of embodiment 3, the push-pull device for assembling and disassembling the movable metallurgical equipment is optimally designed, and a second running mechanism is arranged between the mounting seat 1 and the base 4, and comprises a hanging plate 14, a pressing plate 15, a supporting plate 16 and a deep groove ball bearing 17; the hanging plate 14 is arranged on one side of the base 4 close to the metallurgical equipment base 3; one end of the pressure plate 15 is connected with the mounting seat 1, the other end of the pressure plate is arranged in a hanging way, and a support plate 16 is arranged below the hanging end of the pressure plate 15; the deep groove ball bearing 17 is arranged between the pressure plate 15 and the supporting plate 16, and the deep groove ball bearing 17 is connected with the hanging plate 14 through a pin shaft 18; the pin 18 is connected to the hanger plate 14 by a safety cover and screws.

The hanger plate 14 is provided with a jackscrew 31, and the rod body of the jackscrew is abutted against the pin shaft 18.

A method for disassembling and assembling metallurgical equipment is characterized by comprising the following steps:

A. disassembling: a pull rod 6 of the push-pull device for dismounting the metallurgical equipment rotates around a rotating seat 5, a clamping part 7 of the pull rod 6 enters from an opening of a clamping groove 9 in the rotating process, and a transmission mechanism drives the pull rod 6 to move so as to pull out the metallurgical equipment 2 from a metallurgical equipment base 3;

B. installation: the pull rod 6 of the push-pull device for dismounting the metallurgical equipment rotates around the rotating seat 5, the clamping part 7 of the pull rod 6 enters from the opening of the clamping groove 9 in the rotating process, the transmission mechanism drives the pull rod 6 to move, and the near end of the transmission mechanism of the metallurgical equipment 2 is pushed back to the metallurgical equipment base 3.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a push-and-pull device is used in metallurgical equipment dismouting, includes mount pad and metallurgical equipment base, the mount pad is installed in metallurgical equipment base one side, set up base, its characterized in that on the mount pad: the base is provided with a rotating seat and a transmission mechanism, one end of the rotating seat is connected with the base, and the other end of the rotating seat is connected with the transmission mechanism; the transmission mechanism is provided with a pull rod, the pull rod is parallel to the metallurgical equipment, one end of the pull rod, which is close to the metallurgical equipment, is provided with a clamping part, and the clamping part is provided with a bulge or a groove in a radial direction around the pull rod; the metallurgical equipment is provided with a clamping seat, the clamping seat is provided with an open clamping groove, and the opening of the clamping groove is arranged on an arc which takes the rotating seat as the center of a circle and takes the rotating seat to the clamping seat as the radius.

2. The push-pull device for dismounting and mounting a metallurgical equipment as claimed in claim 1, wherein: a first walking mechanism is arranged between the mounting seat and the base; the first walking mechanism comprises a linear track and a sliding block, and the linear track is arranged on the mounting seat along the forward direction of the strip steel; the sliding block is connected with the linear track; and a supporting plate is arranged between the sliding block and the base, and the supporting plate is connected with the sliding block and the base through a plurality of bolts respectively.

3. The push-pull device for dismounting and mounting a metallurgical equipment as claimed in claim 2, wherein: and a first connecting key is also arranged between the supporting plate and the base.

4. The push-pull device for dismounting and mounting a metallurgical equipment as claimed in claim 2, wherein: the two linear tracks are arranged in parallel, and each linear track is correspondingly provided with a sliding block.

5. The push-pull device for dismounting and mounting a metallurgical equipment as claimed in claim 1, wherein: the base is provided with guide strips, and the guide strips are respectively arranged on two sides of the base.

6. The push-pull device for dismounting and mounting a metallurgical equipment as claimed in claim 1, wherein: a second walking mechanism is arranged between the mounting seat and the base and comprises a hanging plate, a pressing plate, a supporting plate and a deep groove ball bearing; the hanging plate is arranged on one side, close to the metallurgical equipment base, of the bottom base; one end of the pressing plate is connected with the mounting seat, the other end of the pressing plate is arranged in a hanging manner, and a supporting plate is arranged below the hanging end of the pressing plate; the deep groove ball bearing is arranged between the pressing plate and the supporting plate and is connected with the hanging plate through a pin shaft; the pin shaft is connected with the hanging plate through a safety cover and a screw; the lifting plate is provided with a jackscrew, and a rod body of the jackscrew is abutted against the pin shaft.

7. A push-pull device for dismounting and mounting a metallurgical equipment according to any one of claims 1 to 6, wherein: the transmission mechanism is a gear box, a gear mandrel and a gear are arranged in the gear box, the gear is sleeved on the gear mandrel, two ends of the gear mandrel are rotatably connected with the gear box, one end of the gear mandrel extends out of the gear box and is connected with a wrench or a hand wheel, and the gear mandrel is rotated through the wrench or the hand wheel to drive the gear to rotate; the surface of the pull rod is provided with a rack along the axial direction, the rack extends into the gear box to be meshed with the gear, and the rotation of the gear further drives the rack meshed with the gear to move along the axial direction.

8. A push-pull device for dismounting and mounting a metallurgical equipment according to any one of claims 1 to 6, wherein: the pull rod is a walking bottom plate, and the transmission mechanism comprises a lead screw and a motor; the bottom of the pull rod is connected with the upper end of the rotating seat; the lead screw both sides are close to the tip position and are equipped with the bearing frame respectively, connect the pull rod between two bearing frames, the one end of pull rod is equipped with the motor, the motor output shaft is connected with the tip that the lead screw wore out the bearing frame through belt and belt pulley, the one end that the pull rod is close to metallurgical equipment sets up joint portion.

9. A welded tube rolling mill is characterized in that: comprising a body of a tube rolling mill and a push-pull device for dismounting and mounting a metallurgical equipment according to any one of claims 1 to 8.