Top rushing prevention device for discharging pipe of crown block
By combining proximity sensors and mechanical structures, the problems of inaccurate position monitoring and insufficient protection of the overhead crane's feed pipe during the lifting process are solved, achieving highly reliable anti-overhead protection, improving equipment safety and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2026-03-10
AI Technical Summary
The existing overhead crane's unloading pipe is prone to overshooting accidents during lifting due to malfunctions of the limit device or failure of the control system. Furthermore, it lacks protection after the wire rope breaks, resulting in equipment damage and high maintenance costs.
Non-contact position detection is achieved using proximity sensors, combined with mechanical structures such as guide wheels, contact plates, and hooks, to provide dual protection for the feed tube, ensuring accurate position monitoring and mechanical locking to prevent the feed tube from falling in extreme cases.
It enables real-time and accurate monitoring of the material feed pipe position, reduces the risk of top-impact accidents, improves equipment safety and service life, and reduces maintenance costs.
Smart Images
Figure CN223983396U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to industrial processing technical field, concretely is a kind of overhead crane discharging pipe anti-impact device. BACKGROUND
[0002] In the metallurgical, chemical industry and other industrial fields, overhead crane discharging pipe as the key component of material conveying, its stable operation is important to production efficiency and equipment safety, especially in the conveying process of alumina and other powdery materials, discharging pipe needs to be lifted frequently to adapt to different working conditions requirements, however, in the prior art, if control system fails or limit device malfunctions during lifting, it is easy to cause impact accident, leading to steel wire rope breakage, pipe deformation and even causing equipment failure, which seriously threatens production safety and increases maintenance cost;
[0003] At present, the industry generally sets limit switch on the upper part of lifting track, prevents pipe from rising excessively through electrical signal feedback, but such scheme has obvious defects: traditional limit switch relies on contact type or photoelectric trigger, signal delay or misjudgment may occur due to dust accumulation and component wear, cannot real-time accurately monitor the position of discharging pipe, and the reliability of protection mechanism still needs to be improved, in addition, the existing device lacks protection structure for pipe after pipe impact, and once the connecting rope of pipe breaks, it will cause pipe to fall down and damage equipment.
[0004] Therefore, it is a technical problem to be solved in the field to design an anti-impact device with high-precision position detection and multi-stage protection, realize double protection of discharging pipe lifting process, effectively avoid dangerous situations such as steel wire rope breakage, pipe falling and pipe impact, prolong equipment service life and reduce maintenance cost. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing an overhead crane discharging pipe anti-impact device to solve the problems of pipe falling and pipe impact caused by steel wire rope breakage in the above background technology.
[0006] To achieve the above object, the utility model provides the following technical scheme: an overhead crane discharging pipe anti-impact device, including stock bin, the lower end of stock bin is fixedly connected with guide pipe, and the lower end inside of guide pipe is installed with sliding discharging pipe, the lower end outside surface of stock bin is fixedly provided with side mounting plate, and the side surface of side mounting plate is fixedly installed with lifting motor, the output shaft one end of lifting motor penetrates the inside surface of side mounting plate, and the output shaft of lifting motor is fixedly connected with winding drum, the outer surface of winding drum is wound with steel wire rope, and one end of steel wire rope penetrates the inside surface of guide pipe, and one end of steel wire rope inside guide pipe is fixedly connected with the upper end of discharging pipe, the upper end side surface of guide pipe is installed with rotating guide wheel, and the upper end inside surface of guide pipe is fixedly provided with proximity sensor;
[0007] The inner side surface of the upper end of the guide pipe is fixedly provided with a resisting plate and a resisting block, and the lower end side surface of the resisting plate is installed with a rotating hook.
[0008] Preferably, the inner side surface of the guide pipe is in close contact with the outer side surface of the blanking pipe, and the upper end of the guide pipe penetrates through the lower end of the stock bin.
[0009] The above technical solution can provide stable guiding effect for the lifting of the blanking pipe, ensure the vertical sliding of the blanking pipe along the inner wall of the guide pipe, avoid deviation or shaking during lifting, and realize the penetration of the stock bin and the internal space of the guide pipe.
[0010] Preferably, one end of the steel wire rope connected with the blanking pipe is in close contact with the outer side surface of the guide wheel, and the guide wheel is designed as a rod with thick ends and a thin middle.
[0011] The above technical solution can guide the movement track of the steel wire rope through the guide wheel, and the design of thick ends and a thin middle can ensure that the steel wire rope always contacts the middle surface of the guide wheel during winding and unwinding, reduce the friction loss between the steel wire rope and the port of the guide pipe, and ensure uniform force on the steel wire rope, thereby improving the stability and reliability of the transmission process.
[0012] Preferably, the guide wheel is located on the outer side surface of the guide pipe on the side away from the center of the guide pipe, and the lower ends of the resisting plate and the resisting block are lower than the lower end surface of the proximity sensor.
[0013] The lower ends of the resisting plate and the resisting block are lower than the lower end surface of the proximity sensor, which can ensure that when the proximity sensor fails, the upward movement of the blanking pipe first triggers the mechanical limit to prevent the proximity sensor from being damaged due to excessive collision, thereby realizing the orderly cooperation of electrical protection and mechanical protection.
[0014] Preferably, the upper ends of the resisting plate and the resisting block are designed as slopes, and the upper end slopes of the resisting plate and the resisting block are upwardly arranged towards the upper opening of the guide pipe.
[0015] The above technical solution can avoid the accumulation of falling materials on the upper ends of the resisting plate and the resisting block.
[0016] Preferably, the hook is located directly above the protective plate, and one end of the protective plate towards the center of the blanking pipe is designed as a downward slope.
[0017] The above technical solution can accurately align the clamping area of the protective plate, and ensure that when the blanking pipe falls due to gravity under extreme conditions such as breakage of the steel wire rope, the protective plate can be clamped with the hook to form a mechanical locking structure, thereby avoiding damage to the equipment or leakage of materials due to connection failure.
[0018] Compared with the prior art, the beneficial effects of this utility model are: the anti-collision device for the overhead crane feed pipe:
[0019] 1. By setting a proximity sensor on the inner side of the upper end of the guide tube, a non-contact detection method is adopted, which is more sensitive than the traditional contact switch. At the same time, with the contact plate blocking the proximity sensor, the signal delay or misjudgment caused by dust accumulation and component wear can be effectively avoided, realizing real-time and accurate monitoring of the rising position of the feed tube, providing the first layer of protection from the electrical control level, and significantly improving the reliability of the anti-collision protection mechanism.
[0020] 2. The proximity sensor monitors the position of the feed pipe in real time. When abnormal upward movement is detected, the control signal can be triggered in advance to stop the lifting motor. If the electrical control fails, the contact plate and contact block in the guide tube serve as a mechanical limiting structure. The inclined upper end of the contact plate can cooperate with the protective plate at the upper end of the feed pipe to limit the excessive upward movement of the feed pipe through physical contact, thereby avoiding the wire rope breakage or deformation of the feed pipe caused by the top impact. This forms a double protection and greatly reduces the risk of top impact accidents.
[0021] 3. In extreme situations such as wire rope breakage, the rotating hook below the contact plate can engage with the protective plate, using a mechanical connection structure to prevent the feed pipe from falling due to gravity, thus avoiding damage to the equipment below or material leakage. This design fills the gap in the lack of protection in existing devices after wire rope breakage, improves system safety through mechanical redundancy structure, and reduces equipment damage and maintenance costs caused by sudden failures. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;
[0023] Figure 2 This is a three-dimensional structural diagram of the connection between the side mounting plate, the lifting motor, and the drum of this utility model.
[0024] Figure 3 This is a schematic diagram of the overall cross-sectional three-dimensional structure of this utility model;
[0025] Figure 4 This is a three-dimensional structural diagram of the cross-sectional view of the connection between the feed pipe and the protective plate of this utility model;
[0026] Figure 5 This is a three-dimensional structural diagram of the connection between the contact plate and the hook of this utility model;
[0027] Figure 6 This is a three-dimensional cross-sectional view of the overall working state of this utility model.
[0028] In the figure: 1, stock bin; 2, guide pipe; 3, discharging pipe; 4, side mounting plate; 5, lifting motor; 6, winding drum; 7, steel wire rope; 8, guide wheel; 9, proximity sensor; 10, abutting plate; 11, abutting block; 12, hook; 13, protective plate. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0030] Please refer to Figures 1-6 The utility model provides a kind of technical scheme: a crown block discharging pipe anti-collision device.
[0031] Embodiment one: in this embodiment, it is disclosed: stock bin 1, the lower end of stock bin 1 is fixedly connected with guide pipe 2, and the lower end inside guide pipe 2 is installed with the sliding discharging pipe 3, the lower end outside surface of stock bin 1 is fixedly provided with side mounting plate 4, and the side surface of side mounting plate 4 is fixedly installed with lifting motor 5, the output shaft one end of lifting motor 5 penetrates the inside surface of side mounting plate 4, and the output shaft of lifting motor 5 is fixedly connected with winding drum 6, the outer surface of winding drum 6 is wound with steel wire rope 7, and one end of steel wire rope 7 penetrates the inside surface of guide pipe 2, and the end of steel wire rope 7 inside guide pipe 2 is fixedly connected with the upper end of discharging pipe 3, the upper end side surface of guide pipe 2 is installed with the rotating guide wheel 8, and the upper end inside surface of guide pipe 2 is fixedly provided with proximity sensor 9;
[0032] The inside surface of guide pipe 2 and the outside surface of discharging pipe 3 are fitted, and the upper end of guide pipe 2 penetrates the lower end of stock bin 1;
[0033] One end of steel wire rope 7 connected with discharging pipe 3 and the outside surface of guide wheel 8 are fitted, and guide wheel 8 is the rod design of two ends thick and middle thin;
[0034] Lifting motor 5 installed on side mounting plate 4 drives winding drum 6 to rotate through output shaft, realizes the take-up and release of steel wire rope 7, thereby driving discharging pipe 3 to slide up and down in guide pipe 2, the inside of guide pipe 2 and the outside of discharging pipe 3 are fitted, provide stable lifting guide, avoid discharging pipe 3 to deviate, guide wheel 8 is the rod design of two ends thick and middle thin, guide steel wire rope 7 to move on its surface, reduce friction and ensure that steel wire rope 7 is stressed evenly;
[0035] The proximity sensor 9 is installed on the inner side of the upper end of the guide tube 2. It uses a non-contact detection method to monitor the rising position of the feed tube 3 in real time. When the feed tube 3 rises to near the preset upper limit, the proximity sensor 9 detects the feed tube 3 and immediately sends a signal to the control system to trigger the lifting motor 5 to stop. This prevents the feed tube 3 from rising excessively relative to the hopper 1 from an electrical perspective, thus avoiding overshooting. This design avoids the signal delay or misjudgment problems caused by dust accumulation and component wear of traditional contact switches, and achieves accurate monitoring.
[0036] Example 2: This example is based on Example 1: The upper inner surface of the guide tube 2 is fixedly provided with a contact plate 10 and a contact block 11, and the lower inner surface of the contact plate 10 is provided with a rotating hook 12. The upper inner surface of the feed tube 3 is fixedly provided with a protective plate 13.
[0037] The guide wheel 8 is located on the outer surface of the guide tube 2 on the side of the contact plate 10 away from the center of the guide tube 2, and the lower ends of the contact plate 10 and the contact block 11 are both lower than the lower end surface of the proximity sensor 9.
[0038] The upper ends of both the contact plate 10 and the contact block 11 are designed to be angled, and the upper angled surfaces of both the contact plate 10 and the contact block 11 are set upward toward the upper opening of the guide tube 2.
[0039] The hook 12 is located directly above the protective plate 13, and the end of the protective plate 13 facing the center of the feed tube 3 is set with a downward slope;
[0040] If the proximity sensor 9 fails, the feed pipe 3 continues to rise. The upper protective plate 13 will first contact the abutment plate 10 and the abutment block 11 and be blocked from running. At the same time, when the inclined surface of the protective plate 13 moves upward, it squeezes the lower end of the hook 12, causing the hook 12 to rotate. The lower ends of the abutment plate 10 and the abutment block 11 are lower than the lower end surface of the proximity sensor 9, ensuring that the mechanical limit takes effect immediately after the electrical protection fails, and avoiding the proximity sensor 9 being damaged by impact.
[0041] When the wire rope 7 breaks due to impact, the feed pipe 3 loses tension and is at risk of falling under gravity. At this time, the lower end of the hook 12 below the contact plate 10 flips downward after it is no longer in contact with the inclined surface of the protective plate 13. After the protective plate 13 falls downward with the feed pipe 3, it engages with the lower end of the hook 12 to prevent the feed pipe 3 from falling. This structure fills the defect of the existing device that lacks protection after the wire rope 7 breaks, avoids damage to the equipment below or leakage of materials, and improves safety.
[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A crown block blanking pipe anti-collision device, comprising a stock bin (1), the lower end of the stock bin (1) is fixedly connected with a guide pipe (2), and the lower end of the guide pipe (2) is internally provided with a sliding blanking pipe (3), characterized in that: The lower end outer surface of the silo (1) is fixedly provided with a side mounting plate (4), and the side surface of the side mounting plate (4) is fixedly installed with a lifting motor (5), one end of the output shaft of the lifting motor (5) penetrates the inner side surface of the side mounting plate (4), and the output shaft of the lifting motor (5) is fixedly connected with a winding drum (6), the outer surface of the winding drum (6) is wound with a steel wire rope (7), one end of the steel wire rope (7) penetrates the inner side surface of the guide pipe (2), and the end of the steel wire rope (7) inside the guide pipe (2) is fixedly connected with the upper end of the discharging pipe (3), the upper end side surface of the guide pipe (2) is installed with a rotating guide wheel (8), and the upper end inner side surface of the guide pipe (2) is fixedly provided with a proximity sensor (9).
2. The overhead traveling crane top-piercing-preventing device of claim 1, wherein: The upper end inner side surface of the guide pipe (2) is fixedly provided with a contact plate (10) and a contact block (11), and the lower end side surface of the contact plate (10) is installed with a rotating hook (12), the upper end inner side surface of the discharging pipe (3) is fixedly provided with a protective plate (13).
3. The overhead traveling crane top-piercing-preventing device of claim 1, wherein: The inner side surface of the guide pipe (2) is attached to the outer side surface of the discharging pipe (3), and the upper end of the guide pipe (2) penetrates the lower end of the silo (1).
4. The overhead traveling crane downcomer anti-collision device of claim 1, wherein: One end of the steel wire rope (7) connected with the discharging pipe (3) is attached to the outer side surface of the guide wheel (8), and the guide wheel (8) is designed as a rod with thick ends and a thin middle.
5. The overhead traveling crane downcomer anti-collision device of claim 2, wherein: The guide wheel (8) is located on the outer side surface of the guide pipe (2) away from the center of the guide pipe (2) on the side of the contact plate (10), and the lower ends of the contact plate (10) and the contact block (11) are lower than the lower end surface of the proximity sensor (9).
6. The overhead traveling crane top-piercing-preventing device of claim 2, wherein: The upper ends of the contact plate (10) and the contact block (11) are designed as inclined surfaces, and the inclined surfaces of the upper ends of the contact plate (10) and the contact block (11) are upwardly arranged towards the upper end opening of the guide pipe (2).
7. The overhead traveling crane top-piercing-preventing device of claim 2, wherein: The hook (12) is located directly above the protective plate (13), and one end of the protective plate (13) towards the center of the discharging pipe (3) is arranged as a downward inclined surface.