Linkage ladder capable of controlling pitching position of steel structure

Abstract

The invention belongs to the technical field of stacker-reclaimers, and particularly relates to a linkage ladder capable of controlling the pitching position of a steel structure, which is arranged between a cantilever frame and a cantilever frame platform of a stacker-reclaimer, a track is arranged on the upper side of the rear end of the cantilever frame, a ladder frame is hinged to the rear side of the cantilever frame platform, a ladder is arranged on the ladder frame, and rollers are arranged at the lower end of the ladder frame. The rollers are matched with the rails; an approaching position detection device is arranged on the ladder frame, induction supports are arranged on one sides of the two ends of the rail, each induction support comprises a vertical frame, and the approaching position detection device is matched with the induction supports to achieve starting and stopping control of the hydraulic oil cylinder. The upper end of the step is hinged to the side portion of the cantilever support platform, the lower end of the step is provided with the roller which is slidably arranged in the rail on the upper side of the tail end of the cantilever support, and therefore the step can conduct self-adaptive angle change along with pitching motion of the cantilever support, and workers can conveniently go up and down the cantilever support platform to observe or maintain and repair a cantilever belt conveyor and other equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of stacker-reclaimers, and in particular relates to a linkage ladder capable of controlling the pitch position of a steel structure. Background Art

[0002] When the stacker and reclaimer is in use, a belt conveyor is arranged on the cantilever to transport and stack materials. At the same time, in order to achieve adjustable height of the cantilever belt conveyor's dropping point, ensure the dropping effect, and increase the storage volume, the stacker and reclaimer cantilever is hinged and the cantilever is driven to pitch by a hydraulic cylinder. In the process of stacking, it is necessary to observe and maintain the operating condition of the cantilever belt conveyor of the stacker and reclaimer, and perform emergency repairs in case of blockage or other conditions. At present, most of them are fixed with steps on the side of the cantilever platform, and the steps correspond to the upper and lower ends of the cantilever tail ends, so that the staff can get on and off the cantilever platform. However, due to the influence of the cantilever pitch stroke, the lower end of the steps is suspended. If the suspended height is high, it is very inconvenient for the staff to go up and down. If the suspended height of the steps is low, during the cantilever pitch process, the cantilever tail end will interfere with the lower end of the steps when it is raised. Summary of the invention

[0003] The present invention solves the problem that the existing stacker and reclaimer capable of realizing the pitching action of the cantilever belt conveyor is provided with a step fixedly arranged on the side of the cantilever frame platform. If the hanging height of the lower end of the step is high, it is very inconvenient for personnel to go up and down. If the hanging height of the step is low, the tail end of the cantilever and the lower end of the step will interfere with each other during the pitching process of the cantilever. The present invention provides a linkage ladder capable of controlling the pitching position of the steel structure. The upper end of the ladder is hinged to the side of the cantilever frame platform, and a roller is arranged at the lower end to slide in the upper track of the tail end of the cantilever frame. Therefore, the angle of the ladder can change with the pitching of the cantilever frame, and different cantilever pitching angles can be used. At the same time, the lower end of the ladder frame is always located on the cantilever frame, which is convenient for personnel to go up and down the cantilever frame platform to observe or maintain and repair the cantilever belt conveyor and other equipment.

[0004] In order to achieve the above object, the technical solution of the present invention is: A linkage ladder capable of controlling the pitch position of a steel structure is arranged between a cantilever frame and a cantilever frame platform of a stacker and reclaimer. When the cantilever frame pitches, a track is arranged on the upper side of the rear end of the cantilever frame, and a ladder frame is hingedly arranged on the rear side of the cantilever frame platform. A ladder is arranged on the ladder frame, and the ladder comprises a plurality of step plates, each of which has an arc-shaped upper side and an anti-slip structure. A roller is arranged at the lower end of the ladder frame, and the roller matches the track. The angle of the ladder frame changes accordingly with the pitch movement of the cantilever frame, so that the staff can conveniently go up and down the cantilever frame platform to observe and maintain the cantilever belt conveyor at different pitch angles of the cantilever frame.

[0005] A support is provided on the step frame, and a proximity position detection device is provided on the support. Induction brackets are provided on one side of both ends of the track, and each of the induction brackets includes a vertical frame. When the proximity position detection device approaches the vertical frame, the cantilever frame stops the pitching movement, and the pitching stroke limit start and stop of the cantilever frame is achieved by cooperating with the proximity position detection device and the vertical frame.

[0006] Preferably, the track includes a track plate and a track groove, the track plate is fixedly arranged on the upper side of the rear end of the cantilever frame, two track grooves are arranged above the track plate, the rollers are respectively located in the corresponding track grooves, the rollers are moved, guided and limited by the track grooves, and the lateral direction of the ladder frame is limited by the cooperation of the track grooves and the rollers, so as to avoid the ladder frame from swinging and ensure the stability of people when going up and down.

[0007] Preferably, the pitch angle range of the front end of the cantilever frame is -13° to 6°, that is, with the cooperation of the stand and the proximity position detection device, the maximum pitch angle of the cantilever frame from the horizontal state is 13°, and the maximum pitch angle from the horizontal state is 6°.

[0008] Preferably, two supports are provided on the step frame, and the two supports are respectively located on one side of the middle and lower part of the step frame; each of the supports is also provided with a locking position detection device, and the two locking position detection devices are respectively located on the side close to the two proximity position detection devices; each of the sensing brackets also includes a locking bracket, and the two locking brackets are respectively located on the side away from the two vertical frames, and the locking brackets are located on the motion trajectory of the corresponding locking position detection device; when the proximity position detection device passes the corresponding vertical frame, the locking position detection device contacts the locking bracket, and the cantilever frame stops the pitching movement, and the locking position detection device cooperates with the locking bracket to ensure that when the contact unknown detection device is damaged, the travel limit of the pitch angle of the cantilever frame can also be achieved.

[0009] Preferably, the pitch angle range of the front end of the cantilever is -14° to 7°, that is, under the cooperation of the locking position detection device and the locking bracket, the maximum pitch angle of the cantilever from the horizontal state is 14°, and the maximum pitch angle from the horizontal state is 7°.

[0010] Preferably, the locking bracket includes a vertical plate, a horizontal plate and a sensing plate. The lower end of the vertical plate is fixedly connected to the cantilever frame, and the upper end is fixedly connected to the horizontal plate. The end of the horizontal plate close to the step frame is fixedly connected to the sensing plate. The sensing plate is tilted downward away from the end of the horizontal plate and forms an obtuse angle with the horizontal plate. When the locking position detection device contacts the locking bracket, the cantilever frame stops pitching.

[0011] Preferably, the step plate adopts an anti-slip tread plate, and the upper side of the step plate is set as an arc surface with an arc-shaped protrusion facing upward, to ensure that the step plate does not affect the convenience of people going up and down when the ladder frame is at different inclination angles, while ensuring the friction between the feet of people and the step plate when going up and down, thereby ensuring safety.

[0012] A stacker-reclaimer comprises the above-mentioned linkage ladder with controllable pitch position of steel structure, the lower part of the cantilever frame platform is fixedly connected to the lower rotating platform, the cantilever frame is hingedly arranged on the lower rotating platform, a hydraulic cylinder is hingedly arranged between the cantilever frame and the lower rotating platform, and the cantilever frame is driven by the hydraulic cylinder to rotate along the lower rotating platform to realize the pitching action of the cantilever frame.

[0013] Through the above technical solution, the beneficial effects of the present invention are: 1. When the cantilever frame of the present invention performs a pitching action, the ladder frame is hinged at the upper end and slidably arranged at the lower end of the cantilever frame. Therefore, the ladder frame adapts to the rotation of the cantilever frame as the hinge position changes, so that the cantilever frame platform and the cantilever frame are always connected with the ladder frame. Then, the staff can go up and down the cantilever frame platform through the steps on the ladder frame without being affected by the pitch angle of the cantilever frame, which is convenient and effective.

[0014] 2. The lower end of the ladder frame of the present invention is provided with a roller, and the roller matches the track provided on the upper side of the tail end of the cantilever frame, and then the lateral swing of the ladder frame is limited by the track to ensure the stability of the ladder frame and the upper steps thereof.

[0015] 3. The angle of the step frame of the present invention changes accordingly with the pitching movement of the cantilever frame, and the angle change of the cantilever frame during pitching can be detected by detecting the angle of the step frame. Therefore, the detection device can be directly installed at the step frame position. Compared with the traditional method of installing the angle detection device at the pitching position of the cantilever frame, the installation is convenient and quick.

[0016] 4. The present invention sets switch structures for controlling the pitching action of the cantilever frame at both ends of the travel of the step frame, and then detects the travel of the step frame. When the step frame reaches the end or starting point of the travel, the cantilever frame stops pitching down or pitching up through contact or induction, thereby avoiding damage to the equipment due to excessive pitching travel angle of the cantilever frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 For the present invention Figure 1 Schematic diagram of the AA section.

[0019] Figure 3 This is a structural schematic diagram of the installation of the sensing bracket of the present invention.

[0020] Figure 4For the present invention Figure 1 Enlarged view of point A in the middle.

[0021] Figure 5 It is a schematic structural diagram of the ladder rack of the present invention.

[0022] Figure 6 It is a schematic diagram of the structure of the cantilever frame of the present invention when the front end is bent down.

[0023] Figure 7 It is a schematic diagram of the structure when the front end of the cantilever frame of the present invention is tilted upward.

[0024] The numbers in the accompanying drawings are: 1 is a cantilever frame, 2 is a cantilever frame platform, 3 is a lower rotating platform, 4 is a hydraulic cylinder, 5 is a track, 6 is a step frame, 7 is a step plate, 8 is a roller, 9 is a support, 10 is a sensing plate, 11 is a locking position detection device, 12 is a proximity position detection device, 13 is a sensing bracket, 14 is a track plate, 15 is a track groove, 16 is a vertical frame, 17 is a vertical plate, and 18 is a horizontal plate. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments: like Figure 1 to Figure 7 As shown, the present embodiment provides a linkage ladder which can control the pitch position of the steel structure, which is arranged between the cantilever frame 1 and the cantilever frame platform 2 of the stacker and reclaimer. The cantilever frame 1 pitches, and a ladder frame 6 is hingedly arranged on the rear side of the cantilever frame platform 2. A ladder is arranged on the ladder frame 6. The staff goes up and down the cantilever frame platform 2 through the ladder frame 6 and the ladder on it to observe, maintain and repair the cantilever belt conveyor. The ladder includes a plurality of step plates 7, each of which has an arc-shaped upper side and is provided with an anti-skid structure. By setting the upper side of the step plate 7 to an arc and making the arc-shaped protrusion upward, when the angle of the step frame 6 changes, the step plate 7 still does not affect the personnel going up and down, and the friction force on the upper side of the step plate 7 is ensured by the anti-skid structure. The step plate 7 adopts an anti-skid tread plate, and its upper side is set to an arc surface with an arc-shaped protrusion facing upward. The anti-skid tread plate as the step plate 7 can effectively increase the friction force on the upper side of the step plate 7, and effectively prevent the personnel from slipping when going up and down the stairs.

[0026] As an implementable embodiment, the step plate 7 includes a plurality of vertically arranged upright plates, adjacent upright plates are fixedly connected, and the upper ends of the plurality of upright plates are successively lowered from the middle to both sides to form an upper side surface of the step plate 7 which is an arc as a whole, thereby ensuring the friction when people go up and down the stairs, and when the angle changes, the curvature of the arc-shaped upper side surface facing upward is basically the same.

[0027] As an implementable embodiment, the step plate 7 is in a rectangular parallelepiped structure and its upper side is arranged in an arc-shaped surface. The upper arc surface of the step plate 7 is provided with a plurality of strip grooves or a plurality of anti-slip protrusions.

[0028] A track 5 is arranged on the upper side of the rear end of the cantilever frame 1, and the track 5 includes a track plate 14 and a track groove 15. The track plate 14 is fixedly arranged on the upper side of the rear end of the cantilever frame 1, and two track grooves 15 are arranged above the track plate 14. A roller 8 is arranged on the lower end of the step frame 6, and the roller 8 matches the track 5. The rollers 8 are respectively located in the corresponding track grooves 15, and the rollers 8 are moved, guided and limited by the track grooves 15, so as to avoid the step frame 6 from shaking when people go up and down the step frame 6, and the travel of the lower end of the step frame 6 is limited by setting the length of the track groove 15.

[0029] The step frame 6 is provided with a support 9, and a proximity position detection device 12 is provided on the support 9. One side of both ends of the track 5 is provided with an induction bracket 13, and the roller 8 is located between the two induction brackets 13. The proximity position detection switch 12 adopts a proximity switch with a model of NBN40-U1K-N0-V1 + V1-W-2M-PUR. Two supports 9 are provided on the step frame 6, and the two supports 9 are respectively located on one side of the middle and lower part of the step frame 6. Each of the supports 9 is provided with a proximity position detection device 12, and each of the supports 9 is also provided with a locking position detection device 11. The two locking position detection devices 11 are respectively located on the side close to the two proximity position detection devices 12, and the locking position detection device 11 adopts a model of EX-T4V7H 335-11Y-RMS+ The mechanical switch of ACC-CGLD-M20-MS, the proximity position detection switch 12 and the locking position detection device 11 can realize the start and stop control of the hydraulic cylinder 4 by cooperating with the stand, that is, the pitch action control of the cantilever frame 1, wherein the locking position detection device 11 serves as a guarantee when the proximity position detection device 12 fails or is damaged; Therefore, under the cooperation of the two approach position detection devices 12, the pitch angle range of the front end of the cantilever frame 1 is -13 to 6°, that is, the maximum downward pitch angle of the front end of the cantilever frame 1 and the horizontal direction are 13°, and the maximum upward pitch angle of the front end of the cantilever frame 1 and the horizontal direction are 6°; When the approach position detection device 12 fails or is damaged, with the cooperation of the two locking position detection devices 11, the pitch angle range of the front end of the cantilever frame 1 is -14° to 7°, that is, the maximum downward pitch angle of the front end of the cantilever frame 1 and the horizontal direction are 14°, and the maximum upward pitch angle of the front end of the cantilever frame 1 and the horizontal direction are 7°.

[0030] Each of the sensing brackets 13 includes a stand 16. When the proximity position detection device 12 approaches the stand 16, the cantilever frame 1 stops the pitching movement. The proximity position detection device 12 is also used to detect the pitching angle of the cantilever frame 1, that is, when the cantilever frame 1 stops the pitching movement under the action of the proximity position detection device 12, if the cantilever frame 1 is in an upward state, the upward angle is 6°, and if the cantilever frame 1 is in a downward state, the downward angle is 13°.

[0031] Each of the sensing brackets 13 also includes a locking bracket, and the two locking brackets are respectively located on the side away from the two vertical frames 16, and the locking brackets are located on the movement trajectory of the corresponding locking position detection device 11; when the approach position detection device 12 passes over the corresponding vertical frame 16, the locking position detection device 11 contacts the locking bracket, and the cantilever frame 1 stops the pitch movement, and the maximum stroke of the pitch movement of the cantilever frame 1 is further limited by the locking position detection device 11.

[0032] The locking bracket includes a vertical plate 17, a horizontal plate 18 and a sensing plate 10. The lower end of the vertical plate 17 is fixedly connected to the cantilever frame 1, and the upper end is fixedly connected to the horizontal plate 18. The end of the horizontal plate 18 close to the step frame 6 is fixedly connected to the sensing plate 10. The end of the sensing plate 10 away from the horizontal plate 18 is tilted downward and forms an obtuse angle with the horizontal plate 18. When the locking position detection device 11 contacts the locking bracket, the cantilever frame 1 stops the pitching movement.

[0033] A stacker and reclaimer comprises the above-mentioned linkage ladder with controllable pitch position of steel structure, the lower part of the cantilever frame platform 2 is fixedly connected to the lower rotating platform 3, the cantilever frame 1 is hingedly arranged on the lower rotating platform 3, a cantilever belt conveyor is arranged at the front end of the cantilever frame 1 for conveying materials, and a counterweight is arranged at the rear end on the other side of the lower rotating platform 3, and a hydraulic cylinder 4 is hingedly arranged between the cantilever frame 1 and the lower rotating platform 3, and the cantilever frame 1 is driven to rotate along the lower rotating platform 3 by the hydraulic cylinder 4 to realize the pitching action of the cantilever frame 1, and the pitching angle of the cantilever frame 1 can be determined by the telescopic action or oil supply of the hydraulic cylinder 4, and then the cantilever frame angle when the hydraulic cylinder 4 drives the cantilever frame 1 to stop the pitching action is controlled by the proximity position detection device 12, as a verification of the pitching angle of the cantilever frame 1 determined by the telescopic action or oil supply of the hydraulic cylinder 4.

[0034] It should be noted that, it is also possible to install only one proximity position detection device 12 on one side of the lower end of the ladder frame 6, corresponding to the two vertical frames 16, to control the travel limit of the pitching action of the cantilever frame 1. However, when the proximity position detection device 12 fails or is damaged, the pitching action of the cantilever frame 1 cannot be effectively limited, and there is a lack of margin. Alternatively, the two locking position detection devices 11 are removed, that is, only two approach position detection devices 12 are used, which has the same problem as using only one approach position detection device 12; Alternatively, four proximity position detection devices 12 are used, that is, the two existing locking position detection devices 11 are replaced with proximity position detection devices 12. However, the problem is that the failure rate of the proximity position detection device 12 is higher than that of the locking position detection device 11. Or four locking position detection devices 11 are used, that is, the existing two proximity position detection devices 12 are replaced by the locking position detection device 11. Because the locking position detection device 11 is a mechanical contact switch, when the locking position detection device 11 cannot pass the corresponding locking bracket, the reserved margin cannot be achieved, that is, the effect of further ensuring the limit of the pitch action travel of the cantilever frame 1 cannot be achieved.

[0035] When in use, when the hydraulic cylinder 4 drives the cantilever frame 1 to perform a pitching movement, the pitching of the rear end of the cantilever frame 1 drives the lower end of the step frame 6 to rise and fall, and then the step frame 6 rotates around the hinge position between the upper end and the cantilever frame platform 2. During this process, the roller 8 at the lower end of the step frame 6 slides in the corresponding track groove 15, and the movement of the lower end of the ladder frame 6 is guided by the track groove 15 on the track 5, so that it moves along the extension direction of the cantilever frame 1, and the ladder frame 6 is limited to avoid it from shaking, thereby realizing the adaptive adjustment of the steps as the cantilever frame 1 pitches up and down, on the one hand avoiding the influence of the pitching movement of the cantilever frame 1, and on the other hand making it convenient for the staff to get on and off the cantilever frame platform 2.

[0036] At the same time, as the front end of the cantilever frame 1 is tilted up to 6° or tilted down to 13° from a horizontal state, the proximity position detection device 12 provided on the step frame 6 gradually approaches the vertical frame 16. At the same time, when the proximity position detection device 12 is directly opposite to the vertical frame 16, the proximity position detection device 12 (i.e., the proximity switch) turns off the telescopic action of the hydraulic cylinder 4 to ensure the upward or downward stroke of the cantilever frame 1. At this time, the pitch angle of the cantilever frame 1 is 6° upward or 13° downward. This data can be used to verify the pitch angle obtained by the hydraulic cylinder 4. If the proximity position detection device 12 fails or is damaged, then when the front end of the cantilever frame 1 continues to tilt up to 7° or tilt down to 14°, the lower end of the locking position detection device 11 contacts the sensing plate 10, and the locking position detection device 11 (i.e., the contact switch) turns off the telescopic action of the hydraulic cylinder 4 as a further guarantee for the stroke control of the cantilever frame 1.

[0037] It should be noted that the pitch angle range of the cantilever frame 1 is not limited to -14° to 7°, but is only optimal within this angle range. It can also be within the pitch angle range allowed by the equipment as needed. The same cantilever frame 1 pitch stroke start and stop adjustment effect can be achieved by simply adjusting the corresponding position of the sensing bracket 13.

[0038] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A linkage ladder capable of controlling the pitch position of a steel structure, arranged between a cantilever frame (1) and a cantilever frame platform (2) of a stacker / reclaimer, wherein the cantilever frame (1) has a pitching motion, characterized in that: A track (5) is arranged on the upper side of the rear end of the cantilever frame (1); a ladder frame (6) is hingedly arranged on the rear side of the cantilever frame platform (2); a ladder is arranged on the ladder frame (6); the ladder comprises a plurality of ladder plates (7); the upper side of each ladder plate (7) is arc-shaped and is provided with an anti-slip structure; a roller (8) is arranged on the lower end of the ladder frame (6); the roller (8) matches the track (5); A support (9) is provided on the step frame (6), and a proximity position detection device (12) is provided on the support (9). Induction brackets (13) are provided on one side of both ends of the track (5), and each of the induction brackets (13) includes a stand (16). When the proximity position detection device (12) approaches the stand (16), the cantilever frame (1) stops its pitching motion.

2. The linkage ladder capable of controlling the pitch position of a steel structure according to claim 1, characterized in that: The track (5) comprises a track plate (14) and a track groove (15); the track plate (14) is fixedly arranged on the upper side of the rear end of the cantilever frame (1); two track grooves (15) are arranged above the track plate (14); the rollers (8) are respectively located in corresponding track grooves (15); and the rollers (8) are moved, guided and limited by the track grooves (15).

3. The linkage ladder capable of controlling the pitch position of a steel structure according to claim 1, characterized in that: The pitch angle range of the front end of the cantilever frame (1) is -13° to 6°.

4. The linkage ladder capable of controlling the pitch position of a steel structure according to claim 1, characterized in that: Two supports (9) are provided on the step frame (6), and the two supports (9) are respectively located on one side of the middle and lower part of the step frame (6); each of the supports (9) is also provided with a locking position detection device (11), and the two locking position detection devices (11) are respectively located on the side close to the two approaching position detection devices (12); each of the sensing brackets (13) also includes a locking bracket, and the two locking brackets are respectively located on the side away from the two vertical frames (16), and the locking brackets are located on the movement trajectory of the corresponding locking position detection device (11); When the approach position detection device (12) passes over the corresponding stand (16), the locking position detection device (11) contacts the locking bracket, and the cantilever frame (1) stops the pitching movement.

5. The linkage ladder capable of controlling the pitch position of a steel structure according to claim 4, characterized in that: The pitch angle range of the front end of the cantilever frame (1) is -14° to 7°.

6. The linkage ladder capable of controlling the pitch position of a steel structure according to claim 4, characterized in that: The locking bracket comprises a vertical plate (17), a horizontal plate (18) and a sensing plate (10); the lower end of the vertical plate (17) is fixedly connected to the cantilever frame (1), and the upper end is fixedly connected to the horizontal plate (18); the end of the horizontal plate (18) close to the step frame (6) is fixedly connected to the sensing plate (10); the end of the sensing plate (10) away from the horizontal plate (18) is tilted downward and forms an obtuse angle with the horizontal plate (18); when the locking position detection device (11) contacts the locking bracket, the cantilever frame (1) stops pitching.

7. The linkage ladder capable of controlling the pitch position of a steel structure according to claim 1, characterized in that: The step plate (7) is a non-slip tread plate, and the upper side thereof is arranged as an arc-shaped surface with an arc-shaped protrusion facing upward.

8. A stacker-reclaimer, characterized in that: The invention comprises a linkage ladder capable of controlling the pitch position of a steel structure as claimed in any one of claims 1 to 7, wherein the cantilever frame platform (2) is fixedly connected to a lower rotating platform (3) below, the cantilever frame (1) is hingedly arranged on the lower rotating platform (3), and a hydraulic cylinder (4) is hingedly arranged between the cantilever frame (1) and the lower rotating platform (3), and the cantilever frame (1) is driven to rotate along the lower rotating platform (3) by the hydraulic cylinder (4) to realize the pitch movement of the cantilever frame (1).

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