CN221114492U

CN221114492U - Profile steel bundling machine

Info

Publication number: CN221114492U
Application number: CN202322812773.7U
Authority: CN
Inventors: 白明华; 郭延军; 任素波
Original assignee: Yanda Branch Of China Heavy Machinery Research Institute
Current assignee: Yanda Branch Of China Heavy Machinery Research Institute
Priority date: 2023-10-19
Filing date: 2023-10-19
Publication date: 2024-06-11
Anticipated expiration: 2033-10-19

Abstract

The utility model discloses a section steel bundling machine, wherein a bundling belt (1) of the section steel bundling machine adopts a spiral disc-shaped bundling belt which is curled after hot rolled narrow strip steel with the thickness of 2.5-3.0 mm is longitudinally sheared and split, a belt feeding device (4), a belt trough device (5), a cutting device (7) and a welding device (8) are installed and fixed on a beam device (6), and the beam device (6) is in moving fit with vertical guide rails (11) on two sides of a door frame (9) through four groups of guide mechanisms (32) on two sides. The utility model has the following beneficial effects: the tape storage device (3) is preloaded with a multi-disc spiral disc-shaped bundling tape disc (2), so that the replacement times are reduced, and the replacement time is shortened; hydraulic compaction and resistance welding are carried out to ensure regular and firm bundling of the section steel bundles; the strapping device (4) is adopted to pretreat the strapping, so that the strapping is more convenient to take materials and the cost is lower; the closed annular groove is adopted, so that the bundling speed is improved, and the rhythm of on-site profile steel production can be met.

Description

Profile steel bundling machine

Technical Field

The utility model relates to the technical field of bundling machines, in particular to a section steel bundling machine.

Background

At present, three bundling modes of a bundling machine for domestic section steel production are mainly adopted: 1. the wire rod bundling machine is used at the earliest, the bundling material adopted is a common carbon steel wire rod or a high-speed wire, the device has the advantages of simple structure, convenient and quick bundling, the disadvantage of loose bundling, and the high-speed wire bundling is easy to scratch the section steel. 2. At present, a lot of alloy steel strip bundling machines are used, and the bundling materials adopted are special alloy steel strips with the thickness of less than 1.2 mm. Its advantages are regular shape, low strength, brittleness and hardness, and easy breaking. Particularly, when the finished steel bundle products are lifted and assembled by adopting the electromagnetic chuck, the weight of the whole bundle of steel is born by the bundling belts, and the breakage phenomenon of the two bundling belt modes is serious. 3. In recent years, thick strapping machines are increasingly used, and the bundling material is a plain carbon steel strip with the thickness of 2-4mm and the width of 40-50 mm which is cut by hot rolled strip steel, and has the advantages of good toughness, high strength, low material cost, attractive and firm bundled section steel bundles, and meeting the use requirement. Chinese patent (CN 112623314 a) discloses a novel steel bundling machine, which comprises a workbench, a first rack, a second rack, the crossbeam, a first mechanism of bending, a second mechanism of bending, a first elevating platform and a second elevating platform, the crossbeam is adjustable to be connected between second rack and first rack, form the space that is used for the shaped steel buttress to pass between crossbeam, second rack and the first rack, the front end of workstation is all located to first elevating platform and second elevating platform, a first mechanism of bending is located first elevating platform upper end, a second mechanism of bending is located second elevating platform upper end, a first mechanism of bending and a second mechanism of bending all horizontal migration, a first mechanism of bending and the up end of a second mechanism of bending are the platform that is used for placing the steel band. The technology uses the steel strip with the thickness of 2-4mm and the width of 20-40mm to bundle the profile steel, and has the functions of a bundling machine and side clamping and upper clamping. The utility model discloses a thick area shaped steel bundling machine of chinese patent (CN 2782563Y), its characteristics are: a bundling device is characterized in that a bundling belt with a certain width and a thickness of more than 1.5mm is firstly conveyed to a hinge-shaped bundling mechanism in a straight line by a straightening machine, the bundling mechanism presses the bundling belt to be in an appearance containing state with a section steel bundle under the action of a power mechanism, and then the head of the bundling belt is welded or riveted. Finally, the clamping device is loosened, and the section steel is tied by means of the loosening force of the section steel.

The prior art is characterized in that: 1. aiming at the characteristics of large thickness and high hardness of the steel belt with the thickness of (2-4) mm and (20-40), the steel belt is directly penetrated at the bottom of the steel belt bundle, and the position of the steel belt is positioned according to the designed outline dimension of the steel belt pile. The advantages are no belt slot, and simplified mechanical structure. The defects are that: the positions of the two ends with heads are difficult to position, and the positions of the lap joints are unstable easily. 2. The bundling process is to bend the steel belts at two sides of the steel bundle for two times respectively, and overlap and form a lap joint on the upper surface of the steel bundle. The disadvantage is that the structure is complex, the bending process of the strapping is unstable and the equipment is large. 3. And welding the two ends of the steel belt together by adopting a welding robot. The defects are that: long action time, complex structure and control and high use and maintenance cost.

Disclosure of Invention

The utility model provides a novel section steel bundling machine aiming at the requirements of steel production sites, and aims to solve the problems of difficult positioning of the two ends with heads, complex structure and control, long action time, high use and maintenance cost and the like.

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

A section steel bundling machine comprises a bundling belt, a bundling belt disc, a belt storage device, a belt conveying device, a belt trough device, a beam device, a portal frame, a base, a hydraulic system and a control system. A bundling belt is arranged in a bundling belt disc of the belt storage device, and a guide mechanism, a clamping mechanism, a straightening mechanism, a measurement and control mechanism and a trimming mechanism of the belt conveying device are all arranged in an installation bottom plate and an installation cover plate; the transverse beam device is provided with a belt conveying device, a belt trough device, a cutting device and a welding device, the belt conveying device receives the bundling belt output by the belt storage device through an inlet roller of a guide mechanism at an inlet end, and the belt conveying device is fixedly connected with the inlet end of the belt trough device through an outlet end; the inner belt groove and the outer belt groove of the belt groove device are both closed rings, the diameter of the outer belt groove is slightly larger than that of the inner belt groove, the inner belt groove and the outer belt groove are matched to form a closed ring-shaped slideway, the belt groove translation mechanism of the belt groove device consists of a belt groove hydraulic cylinder, a crank connecting rod mechanism and a reset spring, and a sliding rod of the crank connecting rod mechanism is fixedly connected with the inner belt groove and is in sliding fit with a sliding sleeve of the outer belt groove; the beam device is matched with the vertical guide rails on the two sides of the door frame through the guide wheels of the four groups of guide mechanisms on the two sides.

The bundling belt is a coiled disc-shaped bundling belt which is curled after hot rolling narrow strip steel is longitudinally sheared and split, and the thickness of the bundling belt is 2.5-3.0 mm; the belt storage device is fixed on a foundation by a belt storage bracket, and a driving shaft of the driving mechanism is connected with a driving shaft of the bundling belt disc.

The belt conveying device is formed by arranging and combining a plurality of mechanisms of a guiding mechanism, a clamping mechanism, a straightening mechanism, a measurement and control mechanism and a trimming mechanism, and the mechanisms are jointly installed in an installation bottom plate, an installation cover plate and a fixed installation plate by adopting an integrated structure type; the belt feeding device is connected with the inlet end of the belt trough device through the outlet end, and is provided with at least two groups of belt head position detection switches.

The trimming mechanism comprises a strapping surface trimming mechanism and a strapping four-corner chamfering mechanism, wherein the surface trimming mechanism comprises a trimming bracket, a miniature electric grinding head and a screw adjusting mechanism; the four-corner chamfering mechanism consists of a trimming bracket, two groups of chamfering rollers and a screw adjusting mechanism; the straightening mechanism consists of a straightening bracket, a screw adjusting mechanism and a plurality of groups of straightening roller groups; the clamping mechanism consists of a fixed pinch roll, a pressing pinch roll, a clamping bracket, a clamping cylinder and a driving motor; the measurement and control mechanism consists of an encoder, a pair of measurement and control roller sets and a mounting bracket.

The beam device consists of a lifting beam, a guide mechanism and a driving mechanism.

The cutting device consists of a cutting hydraulic cylinder, an upper cutter mechanism, a lower cutter mechanism and a cutting support, wherein the cutting support of the cutting device is arranged on the lifting beam base, and the lower cutter mechanism is fixedly arranged on the belt conveying device.

The welding device comprises a welding bracket, a welding power supply, a water-cooling upper electrode, a water-cooling lower electrode, a spot welding hydraulic cylinder and a transposition hydraulic cylinder, and is fixed on a lifting beam through the welding bracket, wherein the water-cooling upper electrode and the water-cooling lower electrode adopt quick-change electrodes.

The portal adopts rectangular frame structure, and its both sides stand sets up vertical guide rail, and the lower part crossbeam sets up slip table mechanism, and the actuating mechanism of crossbeam device is installed on the entablature of portal.

The base is fixedly arranged on the foundation, the upper part of the base is provided with a sliding seat which is in sliding fit with a sliding table mechanism of the portal, and a sliding seat transmission device between the portal and the base is hydraulically or electrically driven and is provided with a locking mechanism.

Compared with the prior art, the section steel bundling machine has the following beneficial effects: the strip storage device is preloaded with a plurality of spiral disc-shaped bundling strip discs which are curled after hot rolling narrow strip steel with the thickness of 2.5-3.0 mm is longitudinally sheared and split, so that the replacement times of bundling strips are reduced, and the replacement time is shortened. Technical measures such as hydraulic compaction and resistance welding are adopted to ensure regular and firm bundling of the section steel bundles. The band feeding device is used for preprocessing the binding band, so that the binding band is more convenient to take materials and lower in cost. The closed annular groove is adopted, so that the bundling speed is improved, and the rhythm of on-site profile steel production is met.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

FIG. 1 is a front view of a section steel baler;

FIG. 2 is a cross-sectional view A-A of the section steel baler;

FIG. 3 is a side view of a section bar baler;

FIG. 4 is a schematic view of the structure of the strip storage device of the section steel baler;

FIG. 5 is a schematic view of a slotted apparatus of a section steel baler;

FIG. 6 is a C-C cross-sectional view of a slotted device of a section bar baler;

FIG. 7 is a B-B cross-sectional view of the section steel baler;

FIG. 8 is a schematic view of a belt feeder of the section steel baler;

FIG. 9 is a D-D sectional view of a strap feeding apparatus of the section steel baler;

FIG. 10 is a schematic structural view of a welding device of the section steel baler;

Fig. 11 is a schematic structural view of embodiment 2 of the present utility model.

In the above figures, 1-strapping, 2-strapping reel, 3-accumulator, 4-feed, 5-slotted, 6-beam, 7-cut-off, 8-weld, 9-portal, 10-base, 11-vertical rail, 12-accumulator carriage, 13-drive, 14-strapping, 15-guide, 16-pinch, 17-straightening, 18-monitor, 19-trimming, 20-mounting shoe, 21-mounting shoe, 22-entry roller, 23-inner slotted, 24-outer slotted, 25-endless slideway, 26-slotted cylinder, 27-crank link, 28-return spring, 29-slide bar, 30-slide sleeve, 31-lifting beam, 32-guide, 33-drive, 34-cut-off cylinder, 35-cutter up, 36-down cutter, 37-cut-off carriage, 38-weld carriage, 39-weld power, 40-water-cooled upper electrode, 41-cooled lower electrode, 42-spot-weld hydraulic, 43-transposition, 44, 45-endless roll, 45-46, 48-electric tension, 48-bending, 52-electric-bending, 52-setting, 45-electric-roll bending, 48-setting, 52-bending, 52-electric-bending, 57-fixed pinch rolls, 58-pressing pinch rolls, 59-clamping supports, 60-clamping cylinders, 61-encoders, 62-measurement and control roll sets, 63-fixed mounting plates, 64-quick-change electrodes and 65-conductive copper strips.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The utility model will be described in detail below with reference to the drawings in conjunction with embodiments.

Example 1

A section steel bundling machine comprises a bundling belt 1, a bundling belt reel 2, a belt storage device 3, a belt conveying device 4, a belt trough device 5, a beam device 6, a cutting device 7, a welding device 8, a portal frame 9, a base 10, a hydraulic system and a control system. The bundling belt 1 is obtained by uncoiling a coiled disc-shaped bundling belt disc 2 which is curled after slitting hot-rolled narrow strip steel with the thickness of 2.5-3.0 mm, the belt feeding device 4, the belt trough device 5, the cutting device 7 and the welding device 8 are all installed and fixed on a beam device 6, and the beam device 6 is matched with vertical guide rails 11 on two sides of a door frame 9 through guide wheels of four groups of guide mechanisms 32 on two sides. See fig. 1, 2 and 3.

The tape storage device 3 is composed of a tape storage bracket 12, a transmission mechanism 13 and a tape box 14 which can store a plurality of tape reels 2. See fig. 4.

The belt feeding device 4 consists of a guiding mechanism 15, a clamping and feeding mechanism 16, a straightening mechanism 17, a measurement and control mechanism 18 and a trimming mechanism 19, wherein the mechanisms are arranged according to the technological requirements and are jointly installed in an installation base plate 20, an installation cover plate 21 and a fixed installation plate 63 in an integrated structure mode. The belt feeding device 4 receives the bundling belt 1 output by the belt storing device 5 through an inlet roller 22 of a guiding mechanism 15 at an inlet end, and the belt feeding device 4 is fixedly connected with the inlet end of the belt groove device 5 through an outlet end. The tape feeding device 4 is provided with at least two sets of tape head position detection switches 56. See fig. 7, 8 and 9.

The trimming mechanism 19 comprises a strap surface trimming mechanism and a strap four-corner chamfering mechanism, wherein the surface trimming mechanism consists of a trimming bracket 50, a miniature electric grinding head 51 and a screw adjusting mechanism 52, and the four-corner chamfering mechanism consists of the trimming bracket 50, two groups of chamfering rollers 55 and the screw adjusting mechanism 52. The straightening mechanism 17 consists of a straightening support 53, a screw adjusting mechanism 52 and a plurality of groups of straightening roller groups 54. The pinch mechanism 16 is composed of a fixed pinch roller 57, a pinch roller 58, a pinch bracket 59, a pinch cylinder 60 and a driving motor. The measurement and control mechanism 18 consists of an encoder 61, a pair of measurement and control roller sets 62 and a mounting bracket.

The belt trough device 5 consists of an inner belt trough 23, an outer belt trough 24 and a belt trough translation mechanism, wherein the inner belt trough 23 is of a closed ring shape (O-shaped or U-shaped), the outer belt trough 24 is slightly larger than the inner belt trough 23 in size, the inner belt trough 23 and the outer belt trough 24 are matched to form a closed ring-shaped slideway 25, the belt trough translation mechanism consists of a belt trough hydraulic cylinder 26, a crank connecting rod mechanism 27 and a return spring 28, and a sliding rod 29 of the crank connecting rod mechanism 27 is fixedly connected with the inner belt trough 23 and is in sliding fit with a sliding sleeve 30 of the outer belt trough 24. See fig. 5 and 6.

The beam device 6 consists of a lifting beam 31, a guide mechanism 32 and a driving mechanism 33. See fig. 7.

The cutting device 7 consists of a cutting hydraulic cylinder 34, an upper cutter mechanism 35, a lower cutter mechanism 36 and a cutting bracket 37, wherein the cutting device 7 is fixedly arranged on the base of the lifting cross beam 4 through the cutting bracket 37, and the lower cutter mechanism 36 is fixedly arranged on the belt conveying device 4. See fig. 7;

The welding device 8 consists of a welding bracket 38, a welding power supply 39, a water-cooled upper electrode 40, a water-cooled lower electrode 41, a spot welding hydraulic cylinder 42 and a transposition hydraulic cylinder 43, and the welding device 8 is fixed on the lifting beam 31 through the welding bracket 38. See fig. 7.

The water-cooled upper electrode 40 and the water-cooled lower electrode 41 adopt quick-change electrodes 64 and are respectively connected with the welding power supply 39 through conductive copper strips 65. See fig. 10.

The portal 9 adopts a rectangular frame structure, vertical guide rails 11 are arranged on upright posts on two sides of the portal 9, a sliding table mechanism is arranged on a lower cross beam, and a driving mechanism of the cross beam device is arranged on an upper cross beam of the portal 9. The base 10 is fixedly arranged on a foundation, a sliding seat is arranged at the upper part of the base, and a sliding table mechanism of the door frame 9 forms sliding fit.

The sliding seat transmission device between the portal 9 and the base 10 adopts hydraulic or electric drive and is provided with a locking mechanism.

The trimming mechanism 19 in the tape feeder 4 adopts a chamfering mechanism or a grinding mechanism.

The working process of the utility model comprises the following steps:

Before working, the bundling machine is in a standby state, at the moment, the beam device 6 and the belt trough device 5 arranged on the bundling machine are in an upper working position, and other devices are also in a normal standby position, namely, the belt trough device 5 is closed, the upper cutter mechanism 35, the upper electrode and the lower electrode are retracted, and the belt storage device 3 is in a standby state;

When the automatic bundling machine is used for bundling, a field detection control or an operator sends out a bundling command according to the bundle state of the section steel, and the bundling machine finishes the automatic bundling according to a PLC program. The specific action steps are as follows:

Step 1: the section steel bundles 44 formed by stacking section steel are conveyed into a bundling passage formed by the portal 9, the beam device 6 and the belt trough device 5 through the field conveying roller way, and stay at a bundling position, and an automatic bundling procedure is started. Firstly, the original hydraulic pressing device and the vertical roller on site squeeze the side surface of the steel bundle and fix the side surface.

Step 2: the beam device 6 descends, the belt trough device 5 is driven to descend, when the lower surface of the lifting beam 31 touches and presses the steel bundles 44, the steel bundles 44 are completely pressed and formed at the moment, the driving device 33 of the beam device 6 continues to move downwards, the water-cooled lower electrode 41 is driven to rotate to a working position, and then the driving device 33 stops.

Step 3: the strapping tape 1 on the tape storage device 3 is fed from the upper part of the steel bundle 44 in a nearly horizontal direction through the tape feeding device 4 into the annular slideway 25 formed by the inner and outer grooves of the groove device 5, and forms a lap joint closed annular strapping tape 45 around the steel bundle 44 along the annular slideway 25.

Step 4: the crank linkage 27 of the grooved device 5 drives the inner belt groove 23 to move in the conveying direction of the steel bundle 44 to open the annular slide 25 between the inner and outer belt grooves.

Step 5: the first bending mechanism 46 fixedly installed at the input side of the belt trough device 5 presses the strapping tape 1 to the side of the section steel bundle 44 to bend and fix the strapping tape 1, then the pinch mechanism 16 reverses to gradually tighten the strapping tape 1, the second bending mechanism 47 and the third bending mechanism 48 fixedly installed on the door frame 9 while the strapping tape 1 is tightened, and the fourth bending mechanism 49 fixedly installed at the outer side of the belt trough device 5 sequentially presses the strapping tape 1 to the side of the section steel bundle 44 in a clockwise reverse time sequence, and presses the strapping tape 1 in an approximately annular state to the left and right surfaces and the lower surface of the section steel bundle 44 to form a U shape for the strapping tape 1, and at the moment, the two end parts of the strapping tape 1 are not overlapped and a cutting and overlapping interface position is left.

Step 6: the upper cutter mechanism 35 of the cutting device 7 is moved down to the cutting position and then retracted immediately, at which time the two end portions of the strap 1 overlap and form a welded overlap joint.

Step 7: the welding device 8 adopts two-point sequential welding to firmly spot-weld the lap joint of the bundling belt 1.

Step 8: the driving mechanism 33 of the beam device 6 ascends, the lower electrode is firstly rotated to open, then the beam device 6 is driven to ascend to a waiting machine position, meanwhile, the bundling equipment and the field clamping equipment are reset, and the section steel bundle 44 is conveyed forwards by the field roller way.

The bundling steps 1-8 are a section steel bundling operation cycle, and the steps 1-8 are repeated to finish a plurality of section steel bundling operations.

The tape storage device 3 is provided with a plurality of tape reels each time, and the bundling machine is installed into the initial tape head of the bundling tape by adopting hydraulic transposition and manual assistance.

The strap storage device 3 is provided with tension control to tighten the strap 1 when the strap reel 2 is tightened in the reverse direction, preventing the strap 1 from loosening from the strap storage device.

When the device works normally, the sliding transmission device between the portal 9 and the base 10 is in a locking state, the locking is released when the device fails, the sliding seat of the portal 9 moves along the sliding table on the base 10, the whole frame and the bundling mechanism arranged on the whole frame are moved out, and the maintenance or the whole replacement is convenient.

The section steel bundling machine in the embodiment adopts a bundling machine to bundle one bundling belt at a time around the section steel bundle 44.

Example 2

Embodiment 2 of the present utility model is a bundling machine that bundles two straps at a time around the outer periphery of the steel bundle 44. In this embodiment (see fig. 11), one set of bundling machine employs one portal 9, a base 10 and a beam device 6, and the same bundling strap 1 and bundling strap 1 ', bundling strap reel 2 and bundling strap reel 2 ', strap storage device 3 and strap storage device 3 ', strap feeding device 4 and strap feeding device 4 ', strap slot device 5 and strap slot device 5 ', cutting device 7 and cutting device 7 ', welding device 8 and welding device 8 ' are respectively arranged on both sides of portal 9. The two identical bundling devices act synchronously.

In this embodiment, under the condition that the bundling period allows, two identical bundling devices sharing one portal 9, base 10 and beam device 6 sequentially act step by step, i.e. the identical bundling devices are staggered for a certain action time, so that the electrical and hydraulic loading capacity of the whole equipment can be reduced, and the working efficiency of the section steel bundling machine can be remarkably improved.

The foregoing description is only of the preferred embodiment of the utility model and is not intended to limit the utility model, but any modification, equivalent replacement, improvement or the like of the structure of the device by the bundling method of the utility model is included in the scope of the utility model.

Claims

1. The utility model provides a shaped steel bundling machine, includes bundling belt (1), bundling tape reel (2), stores up area device (3), send area device (4), trough of belt device (5), crossbeam device (6), portal (9), base (10), hydraulic system and control system, its characterized in that: a bundling belt (1) is arranged in a bundling belt disc (2) of the belt storage device (3), and a guide mechanism (15), a clamping and conveying mechanism (16), a straightening mechanism (17), a measurement and control mechanism (18) and a trimming mechanism (19) of the belt conveying device (4) are arranged in an installation bottom plate (20) and an installation cover plate (21); the transverse beam device (6) is provided with a belt conveying device (4), a belt trough device (5), a cutting device (7) and a welding device (8), the belt conveying device (4) receives the bundling belt (1) output by the belt storage device (3) through an inlet roller (22) of a guide mechanism (15) at an inlet end, and the belt conveying device (4) is fixedly connected with the inlet end of the belt trough device (5) through an outlet end; the inner belt groove (23) and the outer belt groove (24) of the belt groove device (5) are of closed ring shapes, the diameter of the outer belt groove (24) is slightly larger than that of the inner belt groove (23), the inner belt groove (23) and the outer belt groove (24) are matched to form a closed ring-shaped slideway (25), a belt groove translation mechanism of the belt groove device (5) consists of a belt groove hydraulic cylinder (26), a crank connecting rod mechanism (27) and a return spring (28), and a sliding rod (29) of the crank connecting rod mechanism (27) is fixedly connected with the inner belt groove (23) and is in sliding fit with a sliding sleeve (30) of the outer belt groove (24); the beam device (6) is matched with the vertical guide rails (11) on two sides of the door frame (9) through guide wheels of four groups of guide mechanisms (32) on two sides.

2. The section steel baler of claim 1, wherein: the bundling belt (1) is a spiral disc-shaped bundling belt which is curled after hot-rolled narrow strip steel is longitudinally sheared and split, and the thickness of the bundling belt is 2.5-3.0 mm; the belt storage device (3) is fixed on a foundation by a belt storage bracket (12), and a driving shaft of a driving mechanism (13) is connected with a driving shaft of the bundling belt disc (2).

3. The section steel baler of claim 1, wherein: the belt conveying device (4) is formed by arranging and combining a plurality of mechanisms of a guide mechanism (15), a clamping mechanism (16), a straightening mechanism (17), a measurement and control mechanism (18) and a trimming mechanism (19), and adopts an integrated structure type, and shares the same mounting bottom plate (20), a mounting cover plate (21) and a fixed mounting plate (63); the belt feeding device (4) receives the bundling belt (1) output by the belt storage device (3) through an inlet roller (22) of a guide mechanism (15) at the inlet end, the belt feeding device (4) is fixedly connected with the inlet end of the belt trough device (5) through the outlet end, and the belt feeding device (4) is provided with at least two groups of belt head position detection switches (56).

4. A section steel baler according to claim 1 or 3, characterised in that: the trimming mechanism (19) comprises a strapping surface trimming mechanism and a strapping four-corner chamfering mechanism, wherein the surface trimming mechanism consists of a trimming bracket (50), a miniature electric grinding head (51) and a screw adjusting mechanism (52); the four-corner chamfering mechanism consists of a trimming bracket (50), two groups of chamfering rollers (55) and a screw adjusting mechanism (52); the straightening mechanism (17) consists of a straightening support (53), a screw adjusting mechanism (52) and a plurality of groups of straightening roller groups (54); the clamping mechanism (16) consists of a fixed pinch roll (57), a pressing pinch roll (58), a clamping bracket (59), a clamping cylinder (60) and a driving motor; the measurement and control mechanism (18) consists of an encoder (61), a pair of measurement and control roller sets (62) and a mounting bracket.

5. The section steel baler of claim 1, wherein: the beam device (6) consists of a lifting beam (31), a guide mechanism (32) and a driving mechanism (33).

6. The section steel baler of claim 5, wherein: the cutting device (7) consists of a cutting hydraulic cylinder (34), an upper cutter mechanism (35), a lower cutter mechanism (36) and a cutting support (37), wherein the cutting support (37) of the cutting device (7) is arranged on the lifting cross beam (31), and the lower cutter mechanism (36) is fixedly arranged on the belt conveying device (4).

7. The section steel baler of claim 1, wherein: the welding device (8) comprises a welding bracket (38), a welding power supply (39), a water-cooling upper electrode (40), a water-cooling lower electrode (41), a spot welding hydraulic cylinder (42) and a transposition hydraulic cylinder (43), and the welding device (8) is fixed on the lifting beam (31) through the welding bracket (38), wherein the water-cooling upper electrode (40) and the water-cooling lower electrode (41) adopt quick-change electrodes (64).

8. The section steel baler of claim 1, wherein: the portal (9) adopts a rectangular frame structure, vertical guide rails (11) are arranged on upright posts on two sides of the portal, a sliding table mechanism is arranged on a cross beam on the lower part of the portal, and a driving mechanism of the cross beam device is arranged on an upper cross beam of the portal (9).

9. The section steel baler of claim 1, wherein: the base (10) is fixedly arranged on the foundation, a sliding seat is arranged on the upper portion of the base, a sliding table mechanism of the door frame (9) is in sliding fit, a sliding seat transmission device between the door frame (9) and the base (10) is hydraulically or electrically operated, and a locking mechanism is arranged.