Chain protection device for automatic cutting and conveying of bars

Abstract

The utility model relates to a chain protection device for automatic cutting and conveying of bars. Comprising two main discharging frames, a support, at least four sets of supports, a first driving mechanism used for driving the head ends and the tail ends of the two main discharging frames to synchronously ascend and descend, auxiliary discharging frames matched with the main discharging frames and a second driving mechanism used for driving the head ends of the two auxiliary discharging frames to synchronously ascend and descend. The single auxiliary discharging frame is located between the two frame bodies. The tail end of the auxiliary discharging frame is hinged to the tail end of the main discharging frame, and a material stopping block is fixedly installed at the tail end of the main discharging frame. Before bars fall onto a transmission chain of a chain conveyor, the chain protection device for automatic cutting and conveying of the bars can protect the transmission chain of the chain conveyor, and the protection effect is good; and the bars falling onto the chain protection device can be automatically rectified and densely arranged, and the implementation effect is good.

Description

Technical Field

[0001] The utility model relates to a chain protection device for automatic cutting and conveying of bars, belonging to the technical field of automatic cutting and conveying of bars. Background Art

[0002] In automatic bar cutting equipment, bars dozens of meters long usually need to be cut into several standard bars, and cutting is usually carried out using a cutting machine; the bars are usually conveyed by a chain conveyor, and the bars fall onto the driving chain of the chain conveyor, and the friction force is used to drive the bars forward.

[0003] However, for current bars, especially bars after smelting, the upper end of the bar is usually clamped by a fixture using a gantry crane and hoisted. After the vertically placed bar is slowly placed into a horizontal state, for convenient operation, it is usually directly placed onto the driving chain of the chain conveyor. The direct consequence of such an operation is that when the bar completely falls onto the driving chain, since the driving chain is flexible, after the fixture is suddenly removed, the bar will vibrate up and down on the driving chain, which will bring a huge load to the driving chain and may even cause damage to the driving chain in severe cases. Additionally, the bar is not strictly perpendicular to the advancing direction of the driving chain on the driving chain. For bars with a very large self-weight, how to correct the deviation is also a difficult problem.

[0004] Based on this, the present utility model is proposed. Content of the Utility Model

[0005] Aiming at the deficiencies existing in the prior art, the utility model provides a chain protection device for automatic cutting and conveying of bars, and the specific technical solution is as follows:

[0006] A chain protection device for automatic cutting and conveying of bars includes two main feeding frames, a bracket, at least four groups of supports, a first driving mechanism for driving the head and tail ends of the two main feeding frames to synchronously lift, a secondary feeding frame adapted to the main feeding frame, and a second driving mechanism for driving the head ends of the two secondary feeding frames to synchronously lift. The main feeding frame is composed of two frame bodies, and a single secondary feeding frame is located between the two frame bodies; the tail end of the secondary feeding frame is hinged to the tail end of the main feeding frame, and a baffle block is fixedly installed at the tail end of the main feeding frame.

[0007] Further improvement: The first driving mechanism includes a first hydraulic cylinder, two first rotating shafts respectively under the head and tail ends of the main material rack, and a connecting rod located between the two first rotating shafts. The end of the first rotating shaft is rotatably connected to the top of the support. The cylinder block of the first hydraulic cylinder is fixedly connected with a first mounting seat. The piston rod end of the first hydraulic cylinder is hinged with a first crankshaft. The first crankshaft is fixedly connected with the first rotating shaft. The end of the connecting rod is hinged with a second crankshaft. The second crankshaft is fixedly connected with the first rotating shaft. The two ends of the first rotating shaft are respectively connected with a third crankshaft. A first hinge hinged with the third crankshaft is fixedly installed at the lower part of the main material rack.

[0008] Further improvement: One side of the third crankshaft is provided with a first shaft hole connected to the first rotating shaft, and the other side of the third crankshaft is provided with a second shaft hole adapted to the chain shaft of the first hinge. The upper part of the third crankshaft is of a V-shaped structure. A jacking part for jacking up the main material rack is arranged on the side of the upper part of the third crankshaft close to the first shaft hole. A anti-retreat part adapted to the upper end of the support is arranged at the lower part of the third crankshaft.

[0009] Further improvement: The second driving mechanism includes second hydraulic cylinders corresponding to the auxiliary material racks one by one. A second mounting seat adapted to the second hydraulic cylinder is arranged at the lower part of the main material rack. The cylinder block of the second hydraulic cylinder is hinged with the second mounting seat. A third mounting seat adapted to the second hydraulic cylinder is fixedly installed at the lower part of the auxiliary material rack. The third mounting seat is hinged with the piston rod end of the second hydraulic cylinder.

[0010] Further improvement: The two ends of the bracket are fixedly connected to the middle parts of the two main material racks. An opening groove for the connecting rod to move is arranged at the lower part of the bracket.

[0011] Further improvement: The included angle between the length direction of the first hydraulic cylinder and the horizontal plane is an acute angle.

[0012] Further improvement: The included angle between the length direction of the first hydraulic cylinder and the horizontal plane is λ, and 20° ≤ λ ≤ 35°.

[0013] Further improvement: The included angle between the length direction of the second hydraulic cylinder and the length direction of the main material rack is an acute angle.

[0014] Further improvement: The included angle between the length direction of the second hydraulic cylinder and the length direction of the main material rack is θ, and 30° ≤ θ ≤ 45°.

[0015] Further improvement: An inclined surface is arranged at the upper end of the side of the material blocking block close to the main material rack.

[0016] The beneficial effects of the present utility model:

[0017] 1. Before the bar falls onto the driving chain of the chain conveyor, the chain protection device for automatic cutting and conveying of bars can protect the driving chain of the chain conveyor, and the protection effect is good.

[0018] 2. It can also automatically correct the deviation and closely arrange the bars falling on the chain protection device, and the implementation effect is good. Brief Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the chain protection device for automatic cutting and conveying of bars of the present utility model;

[0020] Figure 2 It is a schematic structural diagram of the first driving mechanism of the present utility model;

[0021] Figure 3 It is a schematic structural diagram of the second driving mechanism of the present utility model;

[0022] Figure 4 It is a schematic diagram when the chain protection device for automatic cutting and conveying of bars of the present utility model is viewed from below;

[0023] Figure 5 It is a schematic structural diagram of the third crankshaft of the present utility model. Detailed Description of the Embodiment

[0024] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] In the description of the present utility model, it should be noted that unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Embodiment 1

[0028] As Figures 1 to 5 shown, the chain protection device for automatic cutting and conveying of bars includes two main feeding racks 101, a bracket 104, at least four groups of supports 103, a first driving mechanism for driving the head and tail ends of the two main feeding racks 101 to lift synchronously, a secondary feeding rack 102 adapted to the main feeding rack 101, and a second driving mechanism for driving the head ends of the two secondary feeding racks 102 to lift synchronously. The main feeding rack 101 is composed of two frames, and a single secondary feeding rack 102 is located between the two frames; the tail end of the secondary feeding rack 102 is hinged to the tail end of the main feeding rack 101, and a baffle block 1010 is fixedly installed at the tail end of the main feeding rack 101.

[0029] The first driving mechanism includes a first hydraulic cylinder 105, two first rotating shafts 107 respectively below the head and tail ends of the main feeding rack 101, and a connecting rod 109 located between the two first rotating shafts 107. The end of the first rotating shaft 107 is rotatably connected to the top of the support 103. The cylinder block of the first hydraulic cylinder 105 is fixedly connected with a first mounting seat 1051, the piston rod end of the first hydraulic cylinder 105 is hinged with a first crankshaft 106, the first crankshaft 106 is fixedly connected with the first rotating shaft 107, the end of the connecting rod 109 is hinged with a second crankshaft 108, the second crankshaft 108 is fixedly connected with the first rotating shaft 107, both ends of the first rotating shaft 107 are respectively connected with a third crankshaft 1013, and a first hinge 1012 hinged with the third crankshaft 1013 is fixedly installed at the lower part of the main feeding rack 101.

[0030] On one side of the third crankshaft 1013, there is a first shaft hole 10131 connected to the first rotating shaft 107. On one side of the third crankshaft 1013, there is a second shaft hole 10132 adapted to the chain shaft of the first hinge 1012. The upper part of the third crankshaft 1013 is a V-shaped structure. On the side of the upper part of the third crankshaft 1013 close to the first shaft hole 10131, there is a jacking part 10133 for jacking up the main feeding rack 101. The lower part of the third crankshaft 1013 is provided with a retaining part 10134 adapted to the upper end of the support 103.

[0031] The second driving mechanism includes second hydraulic cylinders 1011 corresponding to the secondary material racks 102 one by one. A second mounting seat 10111 adapted to the second hydraulic cylinders 1011 is provided at the lower part of the main material rack 101. The cylinder block of the second hydraulic cylinder 1011 is hinged to the second mounting seat 10111. A third mounting seat 1021 adapted to the second hydraulic cylinder 1011 is fixedly installed at the lower part of the secondary material rack 102. The third mounting seat 1021 is hinged to the end of the piston rod of the second hydraulic cylinder 1011.

[0032] The working principle of the chain protection device for automatic cutting and conveying of bars is as follows:

[0033] First, before the bar falls onto the driving chain of the chain conveyor, by starting the first hydraulic cylinder 105, the piston rod of the first hydraulic cylinder 105 extends, and the first rotating shaft 107 is rotated by a certain angle by using the first crankshaft 106. When the first rotating shaft 107 rotates, the third crankshaft 1013 will rotate around the first shaft hole 10131 as the rotation center, and the second shaft hole 10132 will be lifted. Thus, the ends of the two main material racks 101 are synchronously lifted through the cooperation of the first hinge 1012 and the third crankshaft 1013. During the above process, when the first rotating shaft 107 rotates by a certain angle, the other first rotating shaft 107 is also driven to rotate by a certain angle synchronously through the cooperation of the connecting rod 109 and the two second crankshafts 108. In this way, the heads of the two main material racks 101 will be synchronously lifted like their ends. That is to say, the head and tail ends of the two main material racks 101 will be lifted and lowered synchronously under the drive of the first driving mechanism, and the driving force for lifting and lowering only depends on a single first hydraulic cylinder 105, which not only saves costs but also has better synchronism.

[0034] After that, when the two main material racks 101 are lifted, the vertical bars are slowly transformed into a horizontal state and finally fall onto the two main material racks 101. The height at which the two main material racks 101 are lifted is higher than the height of the driving chain of the chain conveyor. In this way, the driving chain of the chain conveyor can be protected.

[0035] Finally, when the piston rod of the first hydraulic cylinder 105 retracts and the two main material racks 101 slowly descend and return to the initial position, the height of the initial position of the two main material racks 101 is lower than the height of the driving chain of the chain conveyor. In this way, the bars can fall onto the driving chain of the chain conveyor. By starting the chain conveyor, the bars can be conveyed through the driving chain. At the same time, the main material rack 101 at this time will not interfere with the conveying of the chain conveyor. During this process, it can avoid the bars hitting the driving chain violently and also avoid the damage caused by the excessive tension of the driving chain due to the violent shaking of the bars. The device has a good protection effect on the driving chain of the chain conveyor.

[0036] The bar can be conveyed to the next process by a chain conveyor, which facilitates the cutting operation of the bar by a cutting machine.

[0037] In addition, when the bar falls onto the driving chain, if the length direction of the bar is not perpendicular to the advancing direction of the driving chain, it is not conducive to conveying, accidents are likely to occur, and it is also not conducive to the subsequent equipment to accurately carry the bar. At this time, the second hydraulic cylinder 1011 needs to be started. The piston rod of the second hydraulic cylinder 1011 extends, and due to the installation position relationship between the third mounting seat 1021 and the second hydraulic cylinder 1011, the head end of the auxiliary discharging rack 102 is lifted. Since the tail end of the auxiliary discharging rack 102 is fixedly hinged, the auxiliary discharging rack 102 forms an inclined rack. Since the auxiliary discharging rack 102 is initially hidden between the two frame bodies, at the moment when the head end of the auxiliary discharging rack 102 is lifted, the bar can be made to return to the correct position and fall onto the baffle block 1010 under the action of gravity, and multiple bars can also be closely arranged.

[0038] To ensure safety and stability, when the main discharging rack 101 returns to the initial position, the anti-retreat part 10134 just falls onto the upper end of the support 103. At this time, the upper end of the support 103 supports the anti-retreat part 10134 to prevent it from falling further.

[0039] The upper part of the third crankshaft 1013 is a V-shaped structure to highlight the jacking part 10133 and avoid interference during the movement of the jacking part 10133. When the main discharging rack 101 is lifted to the highest point, the jacking part 10133 can just abut against the main discharging rack 101 to improve stability.

[0040] Embodiment 2

[0041] In Embodiment 1, to avoid interference when the connecting rod 109 moves back and forth and to facilitate the installation of the connecting rod 109; both ends of the bracket 104 are fixedly connected to the middle parts of the two main discharging racks 101, and an opening groove 1041 for the connecting rod 109 to move is provided at the lower part of the bracket 104.

[0042] Embodiment 3

[0043] In Embodiment 1, the included angle between the length direction of the first hydraulic cylinder 105 and the horizontal plane is an acute angle. Preferably, the included angle between the length direction of the first hydraulic cylinder 105 and the horizontal plane is λ, and 20° ≤ λ ≤ 35°. At this angle, the first hydraulic cylinder 105 can drive the main discharging rack 101 to lift with a sufficiently short stroke; because it is a crankshaft structure, if the rotation angle is too large, the synchronism between the two main discharging racks 101 will be very poor, and the transmission resistance will increase significantly.

[0044] Embodiment 4

[0045] In Embodiment 1, the included angle between the length direction of the second hydraulic cylinder 1011 and the length direction of the main material discharging rack 101 is an acute angle. Preferably, the included angle between the length direction of the second hydraulic cylinder 1011 and the length direction of the main material discharging rack 101 is θ, and 30° ≤ θ ≤ 45°. At this angle, the second hydraulic cylinder 1011 can drive the head end of the auxiliary material discharging rack 102 to be lifted within a sufficiently short stroke.

[0046] Embodiment 5

[0047] In Embodiment 1, for the convenience of the next process, a slope is provided at the upper end of the side of the material blocking block 1010 close to the main material discharging rack 101.

[0048] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A chain protection device for automatic cutting and conveying of bars, characterized in that: It includes two main material racks (101), a bracket (104), at least four groups of supports (103), a first driving mechanism for driving the head and tail ends of the two main material racks (101) to lift synchronously, a secondary material rack (102) adapted to the main material rack (101), and a second driving mechanism for driving the head ends of the two secondary material racks (102) to lift synchronously. The main material rack (101) consists of two frame bodies, and a single secondary material rack (102) is located between the two frame bodies; the tail end of the secondary material rack (102) is hinged to the tail end of the main material rack (101), and a stop block (1010) is fixedly installed at the tail end of the main material rack (101).

2. The chain protection device for automatic cutting and conveying of bars according to claim 1, wherein: The first driving mechanism includes a first hydraulic cylinder (105), two first rotating shafts (107) respectively below the head and tail ends of the main material rack (101), and a connecting rod (109) located between the two first rotating shafts (107). The end of the first rotating shaft (107) is rotatably connected to the top of the support (103). The cylinder seat of the first hydraulic cylinder (105) is fixedly connected with a first mounting seat (1051). The piston rod end of the first hydraulic cylinder (105) is hinged to a first crankshaft (106). The first crankshaft (106) is fixedly connected to the first rotating shaft (107). The end of the connecting rod (109) is hinged to a second crankshaft (108). The second crankshaft (108) is fixedly connected to the first rotating shaft (107). Both ends of the first rotating shaft (107) are respectively connected with a third crankshaft (1013). A first hinge (1012) hinged to the third crankshaft (1013) is fixedly installed at the lower part of the main material rack (101).

3. The chain protection device for automatic cutting and conveying of bars according to claim 2, characterized in that: On one side of the third crankshaft (1013), there is a first shaft hole (10131) connected to the first rotating shaft (107). On one side of the third crankshaft (1013), there is a second shaft hole (10132) adapted to the chain shaft of the first hinge (1012). The upper part of the third crankshaft (1013) is of a V-shaped structure. On the side of the upper part of the third crankshaft (1013) close to the first shaft hole (10131), there is a jacking part (10133) for jacking up the main material rack (101). A retaining part (10134) adapted to the upper end of the support (103) is provided at the lower part of the third crankshaft (1013).

4. The chain protection device for automatic cutting and conveying of bars according to claim 3, characterized in that: The second driving mechanism includes second hydraulic cylinders (1011) corresponding to the secondary material racks (102) one by one. A second mounting seat (10111) adapted to the second hydraulic cylinder (1011) is provided at the lower part of the main material rack (101). The cylinder seat of the second hydraulic cylinder (1011) is hinged to the second mounting seat (10111). A third mounting seat (1021) adapted to the second hydraulic cylinder (1011) is fixedly installed at the lower part of the secondary material rack (102). The third mounting seat (1021) is hinged to the piston rod end of the second hydraulic cylinder (1011).

5. A chain protection device for automatic cutting and conveying of bars according to claim 1, characterized in that: Both ends of the bracket (104) are fixedly connected to the middle parts of two main feeding racks (101), and an opening slot (1041) for the movement of the connecting rod (109) is provided at the lower part of the bracket (104).

6. The chain protection device for automatic cutting and conveying of bars according to claim 2, characterized in that: The included angle between the length direction of the first hydraulic cylinder (105) and the horizontal plane is an acute angle.

7. The chain protection device for automatic cutting and conveying of bars according to claim 6, characterized in that: The included angle between the length direction of the first hydraulic cylinder (105) and the horizontal plane is λ, where 20° ≤ λ ≤ 35°.

8. The chain protection device for automatic cutting and conveying of bars according to claim 4, characterized in that: The included angle between the length direction of the second hydraulic cylinder (1011) and the length direction of the main feeding rack (101) is an acute angle.

9. An automatic cutting and conveying chain protection device for bars according to claim 8, characterized in that: The included angle between the length direction of the second hydraulic cylinder (1011) and the length direction of the main feeding rack (101) is θ, where 30° ≤ θ ≤ 45°.

10. A chain protection device for automatic cutting and conveying of bars according to claim 1, characterized in that: A slope is provided at the upper end of the side of the material blocking block (1010) close to the main feeding rack (101).

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