CN215625097U

CN215625097U - A in bank rack for shaped steel is transported

Info

Publication number: CN215625097U
Application number: CN202122330924.6U
Authority: CN
Inventors: 魏超; 鲁照亮; 祝家兴
Original assignee: Masteel Design & Research Institute Co ltd
Current assignee: Masteel Design & Research Institute Co ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-01-25
Anticipated expiration: 2031-09-23

Abstract

The utility model discloses a row of racks for transferring section steel, and belongs to the field of steel rolling workpiece transfer. The chain set comprises a chain set body and a driving unit, wherein the chain set body comprises a front section steel frame, a middle section steel frame and a rear section steel frame which are sequentially hinged, a front section hydraulic cylinder is arranged below the end part of the front section steel frame far away from the middle section steel frame, and a rear section hydraulic cylinder is arranged below the end part of the rear section steel frame far away from the middle section steel frame; chains are arranged on the front section steel frame, the middle section steel frame and the rear section steel frame in a matched mode, and the driving unit is used for driving the chains to transmit. The utility model overcomes the defects that the transfer difficulty of section steel in rows is larger and the production rhythm is influenced in the prior art, and the rows of racks are arranged between the straightening process and the cold sawing process, so that the straightening unit and the sawing and shearing unit have compact structures, reasonable layout, land saving, high-efficiency transfer of off-line section steel, improvement of the working efficiency of a subsequent cold sawing machine and reduction of the production cost.

Description

A in bank rack for shaped steel is transported

Technical Field

The utility model relates to the technical field of steel rolling workpiece transfer, in particular to a row of racks for transferring section steel.

Background

The main process flow of the existing section steel rolling is that a continuous casting blank or a primary rolling blank, heating, cogging and rolling into a special-shaped blank, cutting, universal rough rolling, universal finish rolling, hot sawing into a fixed length, cooling, straightening, cold sawing or cold shearing, checking and classifying, stacking and bundling and warehousing are sequentially carried out, the length size range of the straightened section steel is generally large, the difficulty of off-line transportation is large, a worker needs to carry out qualified product checking on line before entering a cold saw, the section steel can enter a cold saw machine for shearing after the section steel is qualified, the checking time is long, the previous process production time is delayed, the checking time is short, unqualified products can directly enter the cold saw machine for shearing, and the product success rate and the cost can be influenced. How to realize the high-efficient in bank of shaped steel and transport is important to guaranteeing the production rhythm.

Through retrieval, the Chinese patent application number: 2018104603932, the name of invention creation is: panel and timber lift transport frame, this application includes two channel-section steels of parallel placement, is equipped with the roller train in the channel-section steel respectively, and the channel-section steel inboard is equipped with the support frame, is equipped with the guide rail on the support frame, is equipped with the transfer car on the guide rail, and channel-section steel both ends bottom is equipped with elevating gear respectively, and elevating gear includes the supporting seat, is equipped with lift cylinder on the supporting seat, and lift cylinder's telescopic link and channel-section steel bottom are connected, are equipped with the sleeve on the supporting seat, are equipped with the guide bar in the sleeve, and the guide bar top is connected with the channel-section steel. The application has higher transfer efficiency, but is mainly suitable for transferring plates and wood.

Also as in chinese patent application No.: 2014200136153, the name of invention creation is: the device comprises a row of racks for transferring profile steel, wherein the racks comprise a synchronous feeding unit, a chain conveyor unit and a synchronous blanking unit which are sequentially connected, the synchronous feeding unit comprises a driving device I, a transmission shaft I connected with the driving device I, and at least two synchronous feeding racks which are connected with the transmission shaft I, are arranged on an outlet roller way of a straightening machine in a spaced parallel mode and move along the direction perpendicular to the conveying direction of the roller way; the chain conveyor set comprises a driving device, a transmission shaft connected with the driving device and at least two spaced chain conveyor frames arranged in parallel and connected with the transmission shaft simultaneously, and the synchronous feeding frame and the chain conveyor frames are arranged in a staggered manner; the tail end of the chain conveying rack extends to an inlet roller way of the sawing and shearing machine; the synchronous blanking unit comprises a driving device IV, a transmission shaft IV connected with the driving device IV and at least two synchronous blanking racks simultaneously connected with the transmission shaft IV. The application can be directly applied to the in-row transfer of section steel, but in practice there is still room for optimization of the structural form.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to overcome the problems that the transfer difficulty of section steel in rows is higher and the production rhythm is influenced in the prior art, and aims to provide a row rack for transferring the section steel, wherein the row rack is arranged between a straightening process and a cold saw process, so that a straightening unit and a sawing and shearing unit have compact structures and reasonable layout, land is saved, offline section steel can be efficiently transferred, the time for detecting the section steel straightened by the section steel can be prolonged without delaying the production time before the straightening process, the straightened section steel can be simultaneously fed into a cold saw to be cut into sections in the row layout, the working efficiency of a subsequent cold saw is improved, and the production cost is reduced.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the utility model is as follows:

the utility model discloses a row of racks for transferring section steel, which comprises a chain set body and a driving unit, wherein the chain set body comprises a front section steel frame, a middle section steel frame and a rear section steel frame which are sequentially hinged from front to back, a front section hydraulic cylinder is arranged below the end part of the front section steel frame far away from the middle section steel frame, and a rear section hydraulic cylinder is arranged below the end part of the rear section steel frame far away from the middle section steel frame; chains are arranged on the front section steel frame, the middle section steel frame and the rear section steel frame in a matched mode, and the driving unit is used for driving the chains to transmit.

Furthermore, the front-section steel frame comprises a plurality of groups of front-section chain conveying frames which are arranged in parallel, a front-section cross beam frame is connected between the bottoms of the front-section chain conveying frames, and the front-section hydraulic cylinder is arranged below the front-section cross beam frame; the front end of the front-section chain conveying frame is provided with a front-section driven chain wheel used for being matched with a chain for transmission.

Furthermore, the middle section steelframe includes the middle section chain carriage that multiunit parallel arranged, and middle section chain carriage both ends bottom all is equipped with the support post, and is connected with the middle section crossbeam frame between the support post, and the bottom of middle section chain carriage is equipped with and is used for cooperating driven transition sprocket with the chain, and the side of middle section chain carriage still is equipped with the tensioning piece that is used for controlling the chain tensioning.

Furthermore, the rear steel frame comprises a plurality of groups of rear chain conveying frames which are arranged in parallel, a rear cross beam frame is connected between the bottoms of the rear chain conveying frames, a rear hydraulic cylinder is arranged below the rear cross beam frame, and a rear driven sprocket which is used for being matched with the chain for transmission is arranged at the tail end of each rear chain conveying frame.

Furthermore, the driving unit comprises a power motor and a transmission shaft assembly arranged below the middle steel frame, the transmission shaft assembly comprises a long shaft, a plurality of bearing seats are arranged on the long shaft in a matched mode to support the long shaft, a plurality of driving chain wheels are arranged on the long shaft at intervals corresponding to the lower positions of the plurality of groups of middle chain conveying frames, the power motor drives the long shaft and the driving chain wheels to rotate, and the chain is wound on the driving chain wheels and is integrally driven by the transition chain wheels, the front driven chain wheels and the rear driven chain wheels which are matched with each other.

Furthermore, a stopping mechanism for stopping the workpiece is further arranged on the middle section chain conveying frame.

Furthermore, the stopping mechanism comprises a stopping hydraulic cylinder and a stopping hook which are arranged on the side edge of the middle-section chain conveying frame, the stopping hook is of an L-shaped structure, the free end of the horizontal section of the stopping mechanism is hinged to the middle-section chain conveying frame through a pin shaft, the end part of a telescopic rod of the stopping hydraulic cylinder is connected with the bottom of the horizontal section, the telescopic rod stretches and retracts to drive the stopping hook to turn over in a reciprocating mode, and the top end of the vertical section of the stopping hook is higher than or lower than the top plane of the middle-section chain conveying frame.

Furthermore, the single set of front steel frame includes four sets of front chain conveying frames arranged in parallel, the middle steel frame and the rear steel frame are also matched with each other by adopting a four-set conveying frame structure, and the transmission shaft assembly is correspondingly provided with four sets of driving sprockets and is matched with four sets of chains for transmission.

Furthermore, two sets of chain set bodies which are arranged in parallel are arranged, two sets of transmission shaft assemblies are correspondingly arranged below the two sets of middle steel frames, and the two sets of transmission shaft assemblies are driven and controlled by the same set of power motors in a unified mode.

Furthermore, the surfaces of the front-section chain conveying frame, the middle-section chain conveying frame and the rear-section chain conveying frame are respectively provided with chain grooves which are matched with the chains in a guiding way.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

(1) according to the row rack, the front section steel frame, the middle section steel frame and the rear section steel frame which are sequentially hinged are matched, the heights of the front section steel frame and the rear section steel frame can be adjusted to facilitate blank transfer, so that the straightening unit and the sawing and shearing unit are compact in structure, reasonable in layout and land-saving, offline section steel can be transferred, the time for detecting the section steel straightened by the section steel can be prolonged without delaying the production time before the straightening process, the straightened section steel can be arranged in rows and can enter a cold saw to be cut into the section steel at the same time, the working efficiency of the cold saw is improved, and the production cost is reduced.

(2) The row of racks is controlled by the driving unit, and the chain wheel and chain transmission mechanism is adopted to drive the section steel to be transported, so that the section steel is prevented from deviating and sliding off in the transporting process, and the product quality and the production efficiency of section steel rolled pieces are improved.

(3) According to the row rack, the middle section chain conveying rack 401 is also provided with the stopping mechanism for stopping the workpieces, the requirements of the section steel in rows of different specifications can be met according to the production process, and the row rack is more flexible and convenient to apply.

(4) The row rack can form a structural unit by two chain group bodies and one driving unit, and can form a new row rack to complete the function by connecting a plurality of units in series aiming at the section steels with different lengths, thereby being suitable for the row and the transfer of the section steels with various lengths.

Drawings

FIG. 1 is a schematic top view of the arrangement of rows of racks according to the present invention;

FIG. 2 is a schematic side view of the arrangement of rows of racks according to the present invention;

FIG. 3 is a schematic view of the main body of the chain set of the present invention;

FIG. 4 is a schematic view of a front section steel frame structure according to the present invention;

FIG. 5 is a schematic view of a mid-section steel frame structure of the present invention;

FIG. 6 is a rear steel frame structure of the present invention;

FIG. 7 is a schematic structural view of the driveshaft assembly of this invention;

fig. 8 is a schematic structural view of the stopper mechanism of the present invention.

The reference numerals in the schematic drawings illustrate:

100. a chain set body; 200. a drive unit; 201. a chain; 202. a front-section driven sprocket; 210. a driveshaft assembly; 211. a long axis; 212. a bearing seat; 213. a drive sprocket; 300. a front section steel frame; 301. a front section hydraulic cylinder; 302. a front section beam frame; 303. a tensioning member; 304. a front section chain conveying frame; 400. a middle steel frame; 401. a middle section chain conveying frame; 402. a middle section beam frame; 403. a transition sprocket; 404. a stopper mechanism; 405. a stop hydraulic cylinder; 406. a pin shaft; 407. a stop hook; 500. a rear steel frame; 501. a rear section hydraulic cylinder; 502. a rear section beam frame; 503. a rear-section driven sprocket; 504. and a rear chain conveying frame.

Detailed Description

For a further understanding of the utility model, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be further described with reference to the following examples.

Example 1

As shown in fig. 1 to 8, the row of racks for transferring section steel of the present embodiment includes a chain assembly body 100 and a driving unit 200, wherein the chain assembly body 100 includes a front section steel frame 300, a middle section steel frame 400 and a rear section steel frame 500, which are sequentially hinged to each other, and are specifically hinged to each other through a shaft, and therefore, detailed description thereof is omitted. A front-section hydraulic cylinder 301 is arranged below the end part of the front-section steel frame 300 far away from the middle-section steel frame 400, and a rear-section hydraulic cylinder 501 is arranged below the end part of the rear-section steel frame 500 far away from the middle-section steel frame 400; chains 201 are arranged on the front steel frame 300, the middle steel frame 400 and the rear steel frame 500 in a matched mode, and the driving unit 200 is used for driving the chains 201 to transmit. The front section hydraulic cylinder 301 is arranged during transportation, so that the front end of the front section steel frame 300, namely the end far away from the middle section steel frame 400, can be lifted up, and the section steel which is carried can be conveniently and quickly conveyed downwards onto the middle section steel frame 400; the rear section hydraulic cylinder 501 can control the tail end of the rear section steel frame 500, namely, one end of the middle section steel frame 400 is far away, the tail end can descend, profile steel can be conveniently conveyed to a rear section process from the middle section steel frame 400 through the rear section steel frame 500, and efficient conveying is achieved.

Specifically, the row of racks in this embodiment is operated in cooperation with the run-in table and the run-out table, when the run-in table receives a material, the front steel frame 300 is at the lowest position under the control of the front hydraulic cylinder 301, when the run-in table stops, the front hydraulic cylinder 301 receives a signal to act on the front steel frame 300, so that the front end of the front steel frame 300 rises to the highest position, the driving unit 200 starts to operate the driving chain 201 for transmission, and carries the blank on the run-in table to the row of racks, and the blank is located in the area above the front steel frame 300 at this time, and is defined as completing the material receiving operation. The driving unit 200 continues to operate, so that the blank is conveyed to the area above the middle steel frame 400, and at this time, the front-section hydraulic cylinder 301 controls the front-section steel frame 300 to descend to the lowest position again to wait for the next material receiving. Similarly, in the initial state, the rear steel frame 500 is at the highest position under the control of the rear hydraulic cylinder 501, the section steel is slowly transferred to the tail end of the rear steel frame 500 along with the operation, the rear hydraulic cylinder 501 controls the rear steel frame 500 to reach the lowest position, the blank falls above the run-out table, the blanking action is defined as finishing, and then the section steel is transferred to the cold shearing area along with the operation of the run-out table and cut into the section steel; the rear hydraulic cylinder 501 controls the rear steel frame 500 to return to the highest position again to prepare for the next blanking.

The embodiment adopts such bank rack setting, makes the straightener compact structure to the cold shear in-process, and is rationally distributed, practices thrift the land use, can transport, automated inspection to off-line shaped steel, not only can prolong the time of the shaped steel after detecting the shaped steel straightening and not delay the production time before the straightening technology, can also make the shaped steel in bank overall arrangement after the straightening get into the cold saw simultaneously and cut into lumber, improves cold saw machine work efficiency, reduction in production cost.

Example 2

The rows of racks for transferring the section steel of the present embodiment are basically the same as those of embodiment 1, and specifically, as shown in fig. 4, the front section steel frame 300 includes a plurality of sets of front section chain transportation frames 304 arranged in parallel, a front section cross beam frame 302 is connected between bottoms of the front section chain transportation frames 304, and a front section hydraulic cylinder 301 is disposed below the front section cross beam frame 302; the front-section driven sprocket 202 for cooperating with the chain 201 for transmission is provided at the front end of the front-section chain carrier 304.

Correspondingly, as shown in fig. 5, the middle steel frame 400 includes a plurality of sets of middle chain conveyors 401 arranged in parallel, the bottoms of the two ends of each middle chain conveyor 401 are provided with support columns, a middle cross beam frame 402 is connected between the support columns, the bottom of each middle chain conveyor 401 is provided with a transition sprocket 403 for cooperating with the chain 201 for transmission, and specifically, two transition sprockets 403 are provided; and the side edge of the middle section chain conveying frame 401 is also provided with a tensioning member 303 for controlling the tensioning of the chain 201. The tensioning member 303 may specifically adopt various tensioning mechanisms in the industry, belongs to the prior art, and is not described herein again, and may be specifically installed behind the front-section driven sprocket 202, for adjusting the tensioning of the chain 201 to prevent over-loosening or over-tightening.

Correspondingly, as shown in fig. 6, the rear steel frame 500 includes a plurality of sets of rear chain conveyors 504 arranged in parallel, a rear cross beam frame 502 is connected between the bottoms of the rear chain conveyors 504, a rear hydraulic cylinder 501 is arranged below the rear cross beam frame 502, and a rear driven sprocket 503 for cooperating with the chain 201 for transmission is arranged at the tail end of the rear chain conveyor 504. More specifically, the surfaces of the front-section chain conveying frame 304, the middle-section chain conveying frame 401 and the rear-section chain conveying frame 504 are respectively provided with chain grooves which are matched with the chains 201 in a guiding manner, the single-group front-section steel frame 300 comprises four groups of front-section chain conveying frames 304 arranged in parallel, the four groups of front-section chain conveying frames 304 are connected through a front-section cross beam frame 302, the front section of each group of front-section chain conveying frames 304 is provided with a front-section driven sprocket 202, the middle-section steel frame 400 and the rear-section steel frame 500 are matched to adopt a four-group conveying frame structure, four groups of driving sprockets 213 are correspondingly arranged on the transmission shaft assembly 210, and the four groups of chains 201 are matched for transmission.

Further, as shown in fig. 7, the driving unit 200 includes a power motor, and a transmission shaft assembly 210 disposed below the middle steel frame 400, the transmission shaft assembly 210 includes a long shaft 211, a plurality of bearing seats 212 are disposed on the long shaft 211 in a matching manner for supporting, a plurality of driving sprockets 213 are disposed on the long shaft 211 at intervals corresponding to the lower positions of the plurality of sets of middle chain carriers 401, the power motor drives the long shaft 211 and the driving sprockets 213 to rotate, and the chain 201 surrounds the driving sprockets 213 and performs integral transmission through the transition sprocket 403, the front driven sprocket 202, and the rear driven sprocket 503 which are mutually matched. Specifically, as shown in fig. 2, each group of chains 201 sequentially bypasses the driving sprocket 213, the two transition sprockets 403, the front driven sprocket 202 and the rear driven sprocket 503 to form a complete sprocket-chain transmission mechanism, and then the driving sprocket 213 on the long shaft 211 can be driven by the power motor to drive the whole sprocket-chain transmission mechanism to operate, so that blanks can operate above the rows of racks.

Example 3

The rows of racks for transferring the section steel according to this embodiment are substantially the same as those in embodiment 2, and further, the middle chain transfer rack 401 is further provided with a stopping mechanism 404 for stopping the workpiece. As shown in fig. 8, the stopping mechanism 404 includes a stopping hydraulic cylinder 405 and a stopping hook 407 disposed at the side of the middle-section chain conveying frame 401, the stopping hook 407 is of an L-shaped structure, and has a vertical section extending upwards for stopping the blank, and a horizontal section below the vertical section for connecting and fixing, the free end of the horizontal section is hinged to the middle-section chain conveying frame 401 through a pin 406, the end of a telescopic rod of the stopping hydraulic cylinder 405 is connected with the bottom of the horizontal section, the telescopic rod stretches to drive the stopping hook 407 to turn back and forth, so that the top of the vertical section of the stopping hook 407 is higher than or lower than the top plane of the middle-section chain conveying frame 401, i.e., higher than or lower than the position of the upper chain 201, and switching between two states is achieved. As shown by the dotted line in fig. 8, the top plane state is turned downward and is lower than the middle chain carrier 401, and the top plane state is a non-stop state; when the top end of the vertical section of the stopping hook 407 is higher than the top plane of the middle-section chain carriage 401, this state is a stopping state, and the blanks carried above can be temporarily stopped, so that a plurality of blanks are temporarily arranged in a row, the row function is completed, and the subsequent transfer is waited for. In practical application, when the blanks are transferred to the middle section chain conveying frame 401, the blanks can be arranged into groups and then transferred to the rear section chain conveying frame 504 under the action of the plurality of groups of stopping mechanisms 404 according to process requirements.

Example 4

The rack in row for transferring the section steel of this embodiment is basically the same as the above embodiment, and further, as shown in fig. 1, in this embodiment, two sets of chain set bodies 100 arranged in parallel are provided, and two sets of transmission shaft assemblies 210 are correspondingly provided below one set of two sets of middle steel frames 400, and the two sets of transmission shaft assemblies 210 are driven and controlled by the same set of power motors. Along with the practical length difference of the medium-sized steel, the double-chain group body 100 can also be a structural unit, a plurality of units are connected in series, and a clutch is matched in the middle, so that the double-chain group body can be suitable for rows and transfer of the steel with various lengths.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.

Claims

1. The utility model provides a rack in bank for shaped steel is transported which characterized in that: the chain set comprises a chain set body (100) and a driving unit (200), wherein the chain set body (100) comprises a front section steel frame (300), a middle section steel frame (400) and a rear section steel frame (500) which are sequentially hinged from front to back, a front section hydraulic cylinder (301) is arranged below the end part, far away from the middle section steel frame (400), of the front section steel frame (300), and a rear section hydraulic cylinder (501) is arranged below the end part, far away from the middle section steel frame (400), of the rear section steel frame (500); chains (201) are arranged on the front section steel frame (300), the middle section steel frame (400) and the rear section steel frame (500) in a matched mode, and the driving unit (200) is used for driving the chains (201) to transmit.

2. A row of gantries for the transfer of section steel in accordance with claim 1, characterized in that: the front-section steel frame (300) comprises a plurality of groups of front-section chain conveying frames (304) which are arranged in parallel, a front-section cross beam frame (302) is connected between the bottoms of the front-section chain conveying frames (304), and a front-section hydraulic cylinder (301) is arranged below the front-section cross beam frame (302); the front end of the front-section chain conveying frame (304) is provided with a front-section driven chain wheel (202) which is used for being matched with the chain (201) for transmission.

3. A row of gantries for the transfer of section steel in accordance with claim 2, characterized in that: middle section steelframe (400) include middle section chain carriage (401) that multiunit parallel arranged, middle section chain carriage (401) both ends bottom all is equipped with the support post, and is connected with middle section crossbeam frame (402) between the support post, the bottom of middle section chain carriage (401) is equipped with and is used for cooperating driven transition sprocket (403) with chain (201), and the side of middle section chain carriage (401) still is equipped with and is used for controlling tensioning piece (303) of chain (201) tensioning.

4. A row of gantries for the transfer of section steel according to claim 3, characterized in that: the rear section steel frame (500) comprises a plurality of groups of rear section chain conveying frames (504) which are arranged in parallel, a rear section beam frame (502) is connected between the bottoms of the rear section chain conveying frames (504), a rear section hydraulic cylinder (501) is arranged below the rear section beam frame (502), and a rear section driven sprocket (503) used for being matched with and driven by a chain (201) is arranged at the tail end of each rear section chain conveying frame (504).

5. A row of gantries for the transfer of section steel in accordance with claim 4, characterized in that: drive unit (200) are including power motor, and set up in transmission shaft subassembly (210) of middle section steelframe (400) below, transmission shaft subassembly (210) include major axis (211), the cooperation is equipped with a plurality of bearing frames (212) and supports on major axis (211), the below position interval that corresponds multiunit middle section chain carriage (401) on major axis (211) is equipped with a plurality of drive sprocket (213), power motor drive major axis (211) and drive sprocket (213) rotate, chain (201) encircle on drive sprocket (213) and through transition sprocket (403) of mutually supporting, anterior segment driven sprocket (202) and back end driven sprocket (503) carry out whole transmission.

6. A row of gantries for the transfer of section steel according to claim 3, characterized in that: and a stopping mechanism (404) for stopping the workpiece is further arranged on the middle section chain conveying frame (401).

7. A row of gantries for the transfer of section steel in accordance with claim 6, characterized in that: backstop mechanism (404) is including setting up in backstop pneumatic cylinder (405) and backstop hook (407) of middle section chain carriage (401) side, backstop hook (407) adopt L shape structure, the free end of its horizontal segment articulates on middle section chain carriage (401) through round pin axle (406), the telescopic link tip of backstop pneumatic cylinder (405) is connected with the bottom of this horizontal segment, the reciprocal upset of driving backstop hook (407) promptly through the flexible of telescopic link, the vertical section top that makes backstop hook (407) is higher than or is less than the top plane of middle section chain carriage (401).

8. A row of gantries for the transfer of section steel in accordance with claim 5, characterized in that: the single-group front-section steel frame (300) comprises four front-section chain conveying frames (304) which are arranged in parallel, the middle-section steel frame (400) and the rear-section steel frame (500) are matched to adopt a four-group conveying frame structure, four driving chain wheels (213) are correspondingly arranged on the transmission shaft assembly (210), and the transmission shaft assembly is matched with the four chains (201) to carry out transmission.

9. A row of gantries for the transfer of section steel in accordance with claim 5, characterized in that: the chain group body (100) which is arranged in parallel is arranged, two groups of transmission shaft assemblies (210) are correspondingly arranged below the two groups of middle steel frames (400), and the two groups of transmission shaft assemblies (210) are driven and controlled by the same group of power motors in a unified mode.

10. A row of gantries for the transfer of section steel according to any one of claims 5-9, characterized in that: chain grooves which are matched with the chains (201) in a guiding way are respectively arranged on the surfaces of the front section chain conveying frame (304), the middle section chain conveying frame (401) and the rear section chain conveying frame (504).