CN111618483B

CN111618483B - Transverse moving trolley for UOE welded pipe process production line

Info

Publication number: CN111618483B
Application number: CN201910151610.4A
Authority: CN
Inventors: 孟佳骏; 张跃丰; 王熙
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2022-06-28
Anticipated expiration: 2039-02-28
Also published as: CN111618483A

Abstract

The invention discloses a transverse moving trolley for a UOE welded pipe process production line, which comprises a transverse moving trolley body, wherein the transverse moving trolley body is provided with a fixed base and a driving wheel connected through a driving shaft, the driving wheel is driven by a transverse moving control motor, the transverse moving trolley further comprises a positioning device arranged on the fixed base and a positioning comparison control unit, and the positioning device comprises a linear box, a first encoder, a second encoder, a positioning sensor and an in-situ sensor; the positioning comparison control unit comprises a master control PLC, the master control PLC is configured to compare the first position information with the second position information, and the transverse moving trolley is controlled to move according to the comparison result and the detection result of the positioning sensor. Compared with the prior art, the invention has the advantages of high efficiency, purification and safety and has the positive effect of effectively improving the production operation rate.

Description

Transverse moving trolley for UOE welded pipe process production line

Technical Field

The invention relates to equipment for a welded pipe process, in particular to a transverse moving trolley for a UOE welded pipe process production line.

Background

A UOE welded pipe production line comprises LOT1 and LOT2, and the LOT 8932 and the LOT2 are all 109 transverse moving trolleys which are used as the duty of conveying large-caliber welded pipes. In the production process of the welded pipe process, the deviation of the material taking and feeding positions of the traversing carriage plays an important role in the correct conveying of large-diameter welded pipes, so that the positioning accuracy of the traversing carriage is of great significance. At present, a transverse moving trolley mainly controls a motor to drive wheels to move on a track through a frequency converter. In order to ensure the precision requirement of each station, the traverse trolley is generally provided with a positioning device, and the common working principle of the positioning device is generally as follows: the actual numerical value measured by the encoder driven by the driving wheels is compared with the set value between each station, and the transverse moving trolley is confirmed to normally reach the designated station within the range of 10MM and under the condition that the two conditions that the positioning sensor senses the station stop block are met at the same time. However, each traverse trolley needs to carry a plurality of stations, and the counting of the encoder has a certain accumulated error more or less, so that the first station of the production line site is provided with an in-situ stop block, when the traverse trolley moves to the first station, the two conditions are completely met, and the encoder value is cleared and zeroed under the condition that the in-situ sensor senses the stop block. The existing encoders are typically mounted on the active wheels of the traversing carriage by means of shafts.

With the acceleration of production rhythm, the sideslip dolly that currently commonly uses because factors such as driving wheel, track wearing and tearing can cause the production of the problem of skidding, and this has increased the location trouble of sideslip dolly. Although the positioning capacity can be improved to a certain extent through the program zero clearing and zero returning functions, the on-site production rhythm is reduced, the slip fault (the processing time is about 2 hours) is usually reduced through methods of spreading welding flux or welding the surface of a guide rail on the site, and the abrasion of the active wheels and the rails of the transverse moving trolley is obviously aggravated due to the existence of more liquid corrosive media in a water washing area, an expanding area and a water pressure area of a UOE welded pipe process production line. Therefore, it is difficult to reduce the failure rate of the positioning by the method of clearing and returning to zero only. Meanwhile, because the existing encoder is fixed on the driving wheel, the electromechanical fault differentiation is difficult, and multiple times of inspection and confirmation are often needed.

Disclosure of Invention

In view of the above problems of the prior art, an object of the present invention is to provide a traverse carriage for UOE welded pipe process production line, the positioning control part of which can greatly improve the positioning accuracy of the traverse carriage and ensure the stable positioning of the traverse carriage in a highly corroded area.

The analysis of the reasons of the abnormal positioning of the conventional transverse moving trolley mainly comprises the following steps: firstly, the driving wheels are directly contacted with the track to cause abrasion; secondly, a connecting shaft between the encoder and the driving wheel is loosened; and thirdly, the uneven potholes caused by the abrasion of the track on site.

In order to achieve the above object, the present invention provides a traverse trolley for a UOE welded pipe process production line, comprising a traverse trolley body, wherein the traverse trolley body has a fixed base and an active wheel connected through a driving shaft, the active wheel is driven by a traverse control motor, and further comprising a positioning device arranged on the fixed base, and a positioning comparison control unit, the positioning device comprises a linear box, a first encoder, a second encoder, a positioning sensor and an in-situ sensor, the first encoder is arranged on the driving shaft for acquiring first position information of the traverse trolley, the linear box and the second encoder are fixed on the fixed base through a coupling, and the second encoder is configured to acquire second position information of the traverse trolley; the linear box comprises a pull wire which is connected with a positioning base in a vertical angle; the positioning comparison control unit comprises a master control PLC, the master control PLC is configured to compare the first position information with the second position information, and the traverse trolley is controlled to move according to the comparison result and the detection result of the positioning sensor.

Preferably, the controlling the traverse carriage to move according to the comparison result and the detection result of the positioning sensor includes: and if the first position information meets a first preset condition, but the second position information does not meet a second preset condition and the detection result does not meet a third preset condition, recording error information and controlling the transverse moving trolley to move according to the second position information.

Preferably, the system further comprises a human-machine control interface, the master control PLC acquires the error times of the recorded error information, and when the error times meet a fourth preset condition, an error prompt is output to the human-machine control interface.

Preferably, the linear box further comprises an elastic component for controlling the contraction of the pull wire.

Preferably, the elastic member is a spring.

Preferably, a nut for preventing the pull wire from loosening is arranged at one end, connected with the pull wire, of the positioning base.

Preferably, the master PLC includes an encoder switching unit configured to control an operating state of the first encoder and/or the second encoder.

Preferably, the master control PLC is further configured to output a first error message when the comparison result is less than 0, output a normal operation message when the comparison result is between 0 and 50, and output a second error message when the comparison result is greater than 200.

Compared with the prior art, the traverse trolley for the UOE welded pipe process production line can reduce the position calibration of the traverse trolley, improve the production rhythm and simultaneously reduce the working load on the track in the repeated movement process of inaccurate positioning. In addition, mechanical and electrical faults can be distinguished quickly and effectively, and maintenance efficiency is improved greatly. And a stable and smooth safe production atmosphere is provided for a plurality of subsequent transverse trolleys.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

FIG. 1 is a schematic connection diagram of a linear cassette in a traverse carriage for a UOE welded pipe process production line of the present invention;

FIG. 2 is a schematic structural view of a traverse carriage for a UOE welded tube process production line.

The main reference numbers:

1-linear box; 2-a second encoder; 3, coupling; 4-fixing the base; 5-positioning the base; 6-traversing carriage body; 7-a traversing control motor; 8-active wheels; 9-a first encoder; 10-a drive shaft; 11-a positioning sensor; 12-in situ sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without inventive step, are within the scope of protection of the disclosure.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "including" or "comprising" and the like in this disclosure is intended to mean that the elements or items listed before that word, and equivalents thereof, are included without exclusion of other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components is omitted from the present disclosure.

As shown in figures 1 and 2, the traversing carriage for a UOE welded pipe process production line provided by the invention comprises a traversing carriage body 6, the cross sliding trolley body 6 is provided with a fixed base 4 and driving wheels 8 connected through a driving shaft 10, the driving wheels 8 are driven by a cross sliding control motor 7, wherein, the device also comprises a positioning device arranged on the fixed base 4 and a positioning comparison control unit, the positioning device comprises a linear box 1, a first encoder 9, a second encoder 2, a positioning sensor 11 and a home position sensor 12, the first encoder 9 is provided on the drive shaft 10 for acquiring first position information of the traverse carriage, the linear box 1 and the second encoder 2 are fixed on the fixed base 4 through a coupler 3, and the second encoder 2 is configured to acquire second position information of the traverse trolley; the linear box 1 comprises a pull wire (not marked in the figure) which is connected with a positioning base 5 in a vertical angle; the positioning comparison control unit comprises a master control PLC, the master control PLC is configured to compare the first position information with the second position information, and the traverse trolley is controlled to move according to the comparison result and the detection result of the positioning sensor. Specifically, if the first position information meets a first preset condition, but the second position information does not meet a second preset condition and the detection result does not meet a third preset condition, recording error information and controlling the traverse carriage to move according to the second position information. Wherein the first, second and third preset conditions may be exemplified by the first position information indicating that the traverse is in place, the second position information indicating that the traverse is not in place and the positioning sensor 11 indicating that the traverse is not in place. At the moment, the transverse moving trolley can be controlled to move by the master control PLC. In actual production, the error information can be recorded and displayed simultaneously through a man-machine control interface. And outputting an error prompt to the man-machine control interface when the number of times of recording the error information meets a fourth preset condition. The fourth preset condition may be exemplarily set to 30 times, that is, if the number of errors of the same station reaches more than 30 times, it indicates that the active wheel or the guide rail is abnormal. And the master control PLC sends the data to the master control PLC and gives an alarm (does not stop) on a picture of a human-computer control interface, which indicates that the equipment needs to be maintained if the state is not good.

In addition, the front end of the stay wire in the linear box is provided with a second encoder 2 which is arranged on the traverse trolley and used as a moving end, and the position information is transmitted to the master control PLC. And the tail end of the stay wire is fixed on a positioning base 5 on the ground of the station side of the traverse trolley as a fixed end, and the fixed end is used as a zero position of an encoder to form linear comparison. In order to prevent the pull wire from coming loose when the pull wire is fixed to the positioning base 5, it is preferable that a nut (not shown) for preventing the pull wire from coming loose is provided at one end of the positioning base 5 connected to the pull wire.

In the invention, the main control PLC judges 3 specific situations in the process of executing the comparison between the first position information and the second position information:

1. in a certain station, the data of the two encoders are compared under a normal state, the data of the second encoder 2 is taken as main data, the data of the first encoder 9 is taken as comparison data, and the data between the two encoders within 50 is considered to be normal.

2. If the comparison result between the value of the first encoder 9 and the value of the second encoder 2 is negative, it is determined that the data of the first encoder 9 is erroneous, and the data of the second encoder 2 is used for subsequent determination. And the alarm is explained on a human-computer interface, but normal production is not influenced.

3. If the comparison result between the value of the first encoder 9 and the value of the second encoder 2 exceeds 200, it is determined that the active wheel 8 of the traverse carriage is in failure and judged by the data of the second encoder 2. And the alarm is explained on a man-machine control interface, but normal production is not influenced.

Due to the control of the two encoders, considering the occurrence of the situation that the DP cable and the encoder are damaged due to long-time production, the master control PLC is provided with an encoder switching unit with a program function, which is configured to control the working state of the first encoder and/or the second encoder. Specifically, the control function of independent selection can be carried out, and the function aims at realizing normal production on the spot under the premise that any encoder is damaged, does not need to be stopped for processing, and is replaced when the follow-up waiting material is blocked.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

The transverse moving trolley for the UOE welded pipe process production line comprises a transverse moving trolley body, wherein the transverse moving trolley body is provided with a fixed base and a driving wheel connected through a driving shaft, the driving wheel is driven through a transverse moving control motor, the transverse moving trolley is characterized by further comprising a positioning device arranged on the fixed base and a positioning comparison control unit, the positioning device comprises a linear box, a first encoder, a second encoder, a positioning sensor and an in-situ sensor, the first encoder is arranged on the driving shaft and used for acquiring first position information of the transverse moving trolley, the linear box and the second encoder are fixed on the fixed base through a coupler, and the second encoder is configured for acquiring second position information of the transverse moving trolley; the linear box comprises a pull wire which is connected with a positioning base in a vertical angle; the positioning comparison control unit comprises a master control PLC (programmable logic controller), the master control PLC is configured to compare the first position information with the second position information and control the traverse trolley to move according to a comparison result and a detection result of the positioning sensor; wherein the content of the first and second substances,

the front end of a stay wire in the linear box is provided with the second encoder which is arranged on the traverse trolley and used as a moving end, and the position information is transmitted to the master control PLC; the tail end of the stay wire is fixed on a positioning base on the ground of the station side of the traverse trolley to be used as a fixed end, and the point is used as a zero position of the encoder to form linear comparison;

The control of the transverse moving trolley to move according to the comparison result and the detection result of the positioning sensor comprises the following steps: if the first position information meets a first preset condition, but the second position information does not meet a second preset condition and the detection result does not meet a third preset condition, recording error information and controlling the transverse moving trolley to move according to the second position information;

the master control PLC acquires the error times of recording error information, and outputs an error prompt to the human-machine control interface when the error times meet a fourth preset condition.
2. The traverse trolley for a UOE welded tube process line as claimed in claim 1, further comprising an elastic member in said linear box for controlling the shrinkage of said pulling wire.
3. The traverse trolley for a UOE welded tube process line as claimed in claim 2, wherein said elastic member is a spring.
4. The transverse moving trolley for the UOE welded pipe process production line as claimed in claim 1, wherein a nut for preventing the pulling wire from loosening is arranged at one end of the positioning base connected with the pulling wire.
5. The UOE welded tube process line traverse carriage as claimed in claim 1, wherein said master PLC comprises an encoder switching unit configured to control the operation status of said first encoder and/or said second encoder.
6. The transverse moving trolley for the UOE welded pipe process production line as claimed in claim 1, wherein the master PLC is further configured to output a first error message when the comparison result is less than 0, output a normal operation message when the comparison result is between 0 and 50, and output a second error message when the comparison result is greater than 200.