A falling device for preventing the rocker arm of a coal falling pipe air lock from falling

Abstract

The utility model belongs to the field of energy, a prevent falling coal pipe lock air device rocker arm falling device, including mounting bracket, rocker arm and anti -fall chain, mounting bracket surrounds the outer wall of falling coal pipe, one end of rocker arm is hinged in the outer wall of falling coal pipe, the other end is fixedly connected on the wall body, one end of anti -fall chain is fixedly connected in the outer wall of falling coal pipe, the other end is fixedly connected on the wall body, the rocker arm is located above the mounting bracket with anti -fall chain, the mounting bracket is vertically fixedly connected with damping rod, the damping rod is installed below the rocker arm, and the rocker arm falls and contacts the top of damping rod. The utility model has multiple security mechanism, can provide effective support and buffer when the rocker arm is impacted or fatigue damage, prevents its falling.

Description

Technical Field

[0001] This utility model belongs to the energy field and relates to a device for preventing the rocker arm of the coal chute airlock from falling off. Background Technology

[0002] In industrial sites such as coal-fired power plants and coal processing plants, the coal chute is a crucial component of the coal conveying system, and its stability and safety directly affect the operational efficiency and safety of the entire production line. The airlock, a key component of the coal chute, controls the flow of coal by the up-and-down swing of its rocker arm, achieving quantitative coal delivery. However, in actual operation, due to the continuous impact of the coal flow, equipment fatigue, and external environmental factors, the airlock rocker arm is at risk of falling. This could not only damage the equipment but also trigger safety accidents, threatening personnel and property.

[0003] Traditional methods for preventing rocker arm falls typically rely on a single fixed structure, such as direct welding or bolted connections. However, these methods often suffer from insufficient reliability. Once the fixed structure fails, the rocker arm loses its support, leading to a fall. Furthermore, traditional fixed structures often lack effective monitoring methods, failing to detect potential safety hazards in a timely manner and increasing the probability of accidents. Utility Model Content

[0004] The purpose of this invention is to provide a device to prevent the rocker arm of the coal chute airlock from falling. This invention has multiple safety protection mechanisms and can provide effective support and cushioning when the rocker arm is subjected to impact or fatigue damage, thus preventing it from falling.

[0005] The technical solution adopted by this utility model is a device for preventing the rocker arm of a coal chuting pipe from falling off, including a mounting frame, a rocker arm, and a fall arresting chain. The mounting frame surrounds the outer wall of the coal chuting pipe. One end of the rocker arm is hinged to the outer wall of the coal chuting pipe, and the other end is fixed to the wall. One end of the fall arresting chain is fixed to the outer wall of the coal chuting pipe, and the other end is fixed to the wall. The rocker arm and the fall arresting chain are located above the mounting frame. A damping rod is vertically fixed to the mounting frame. The damping rod is installed below the rocker arm, and the rocker arm falls to contact the top of the damping rod.

[0006] The features of this utility model also include:

[0007] Furthermore, the damping rod includes a mounting cylinder and a first spring. The mounting cylinder is vertically fixed to the upper surface of the mounting bracket, and the first spring is sleeved on the outside of the mounting cylinder. The bottom end of the first spring is fixed to the upper surface of the mounting bracket, and a buffer pad is installed at the top end.

[0008] Furthermore, a sealing ring is installed at the top opening of the mounting cylinder, and a guide rod is inserted into the sealing ring. The top end of the guide rod is fixed to the lower surface of the buffer pad, and the bottom end of the guide rod is located inside the mounting cylinder.

[0009] Furthermore, a metal rubber pad is fixed to the bottom end of the guide rod, and the metal rubber pad is interference-fitted with the mounting cylinder.

[0010] Furthermore, a second spring is installed on the bottom wall of the mounting cylinder, and the second spring is located below the metal rubber pad.

[0011] Furthermore, it also includes several third springs, with the bottom end of the third spring fixed to the upper surface of the metal rubber pad and the top end fixed to the lower surface of the sealing ring.

[0012] Furthermore, there are four third springs, which are coaxially arranged around the guide rod.

[0013] Furthermore, it also includes a suspension rope, with the bottom end of the rope fixed to a mounting bracket and the other end fixed to the wall.

[0014] Furthermore, a sealing sleeve is fitted onto the outer wall of the guide rod located outside the mounting cylinder.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model provides dual safety protection for the airlock device through the parallel fixing structure of the rocker arm and the anti-fall chain. Even if the rocker arm breaks due to fatigue or other reasons, the anti-fall chain can still maintain its fixation, effectively preventing falls and ensuring the safety of equipment and personnel. Furthermore, the anti-fall chain serves as a visual inspection point, allowing inspectors to indirectly assess the fatigue level of the rocker arm structure by observing parameters such as its slack and wear marks. This helps to promptly identify and address potential safety hazards, reducing equipment failure rates.

[0017] 2. This utility model features a damping rod, and in particular, the combined use of the first and second springs, along with the addition of a metal rubber pad and a third spring, providing excellent cushioning and shock absorption for the rocker arm. This helps reduce the stress on the rocker arm during swaying, extending its service life, while protecting surrounding structures and equipment from damage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 for Figure 1 Enlarged view of point A;

[0021] Figure 3 This is a cross-sectional view of the damping rod of this utility model;

[0022] In the diagram, 1. Mounting frame, 2. Rocker arm, 3. Anti-fall chain, 4. Coal drop pipe, 5. Damping rod, 51. Mounting cylinder, 52. First spring, 53. Buffer pad, 54. Sealing ring, 55. Guide rod, 56. Metal rubber pad, 57. Second spring, 58. Third spring, 6. Lifting rope, 7. Sealing sleeve. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] The following is in conjunction with the appendix Figure 1 To be continued Figure 3 The present invention will be described in detail with reference to specific embodiments:

[0025] A device for preventing the rocker arm of the coal chute airlock from falling off, reference Figure 1 The system includes a mounting frame 1, a rocker arm 2, and a fall arrestor chain 3. The mounting frame 1 surrounds the outer wall of the coal chutes 4 and is modified according to the shape of the coal chutes 4. One end of the rocker arm 2 is hinged to the outer wall of the coal chutes 4, and the other end is fixed to the wall or other sturdy structure. One end of the fall arrestor chain 3 is fixed to the outer wall of the coal chutes 4, and the other end is fixed to the wall or other sturdy structure. The rocker arm 2 and the fall arrestor chain 3 are located above the mounting frame 1. A damping rod 5 is vertically fixed to the mounting frame 1. The damping rod 5 is installed below the rocker arm 2, and the rocker arm 2 falls down to contact the top of the damping rod.

[0026] The fall arresting chain 3 and the rocker arm 2 form a parallel fixed structure. One end of the rocker arm 2 is hinged to the coal chute, and the other end is fixed to the wall, while both ends of the fall arresting chain 3 are fixed to the coal chute and the wall, forming an independent safety circuit. Even if the rocker arm body breaks due to fatigue cracks or stress concentration, the fall arresting chain can still bear its weight and prevent it from falling.

[0027] As a visual inspection point, the fall arrestor chain 3 allows inspectors to indirectly assess the fatigue level of the rocker arm structure by observing parameters such as chain slack and wear marks. If the chain exhibits abnormal stretching or localized deformation, it indicates that non-destructive testing of the rocker arm 2 is necessary.

[0028] refer to Figure 2The damping rod 5 includes a mounting cylinder 51 and a first spring 52. The mounting cylinder 51 is vertically fixed to the upper surface of the mounting bracket 1. The first spring 52 is sleeved on the outside of the mounting cylinder 51. The bottom end of the first spring 52 is fixed to the upper surface of the mounting bracket 1, and a buffer pad 53 is installed at the top end.

[0029] The first spring 52 is welded to the upper surface of the mounting bracket 1. When the rocker arm 2 shakes, it comes into contact with the buffer pad 53. The first spring 52 plays a supporting and buffering role. When the rocker arm 2 is not under much stress, the first spring 52 absorbs the vibration fluctuations, and the rocker arm 2 does not shake and cause structural damage.

[0030] refer to Figure 3 A sealing ring 54 is installed at the top opening of the mounting cylinder 51. A guide rod 55 is inserted into the sealing ring 54. The top end of the guide rod 55 is fixed to the lower surface of the buffer pad 53, and the bottom end of the guide rod 55 is located inside the mounting cylinder 51.

[0031] A metal rubber pad 56 is fixed to the bottom end of the guide rod 55, and the metal rubber pad 56 is interference-fitted with the mounting cylinder 51. The metal rubber pad 56 is made of austenitic stainless steel, which has both the strength of metal and the elasticity of rubber, and the friction between the metals plays a buffering role.

[0032] A second spring 57 is installed on the bottom wall of the mounting cylinder 51, located below the metal rubber pad 56. When the guide rod 55 is subjected to significant stress, it continuously presses down, causing the metal rubber pad 56 to continuously compress the second spring 57 until it reaches its compression limit, at which point the cushioning motion stops.

[0033] It also includes several third springs 58, the bottom end of which is fixed to the upper surface of the metal rubber pad 56, and the top end of which is fixed to the lower surface of the sealing ring 54.

[0034] There are four third springs 58, which are coaxially arranged around the guide rod 55. As the guide rod 55 is pressed down, the four third springs 58 first stretch and then return to their original position, thereby absorbing and buffering vibrations. After the rocker arm 2 stops moving, the four third springs 58 return to their original position, pushing the rocker arm 2 back to its original position.

[0035] It also includes a suspension rope 6, with the bottom end of the suspension rope 6 fixed to the mounting bracket 1 and the other end fixed to the wall or other sturdy structure. The suspension rope 6 fixes the mounting bracket 1, so that the mounting bracket 1 provides a stable installation platform for the damping rod 5.

[0036] A sealing sleeve 7 is provided on the outer wall of the guide rod 55 located outside the mounting cylinder 51. The sealing sleeve 7 is made of corrugated rubber. The sealing sleeve 7 provides dust protection for the guide rod 55, preventing dust from entering the interior of the mounting cylinder 51 and causing damage to the internal structure of the mounting cylinder 51, thereby improving the working life of the entire damping rod 5.

[0037] The working principle of the device for preventing the rocker arm of the coal chute airlock from falling is as follows: Under normal operating conditions, when the rocker arm 2 vibrates due to the impact of the coal flow, its lower end contacts the buffer pad 53 at the top of the damping rod 5, triggering a three-stage buffer system: the first spring 52 first compresses and absorbs low-frequency, high-amplitude energy; the guide rod 55 pushes the metal rubber pad 56 to dissipate medium-frequency vibration through friction; and the four third springs 58 quickly reset around the guide rod 55, absorbing high-frequency vibration and helping the rocker arm 2 return to its original position. The corrugated rubber sealing sleeve 7 extends and deforms with the guide rod 55, preventing coal dust from entering throughout the process and ensuring the cleanliness of the damping system.

[0038] In abnormal operating conditions, the fall arrestor chain 3 serves as a visual monitoring point. If abnormal stretching (exceeding the design threshold by 2%) or plastic deformation is found in the chain during inspection, it indicates that fatigue cracks have appeared in the rocker arm 2 body, requiring immediate repair. At this time, the fall arrestor chain 3 and the rocker arm 2 form a parallel force-bearing system, with its breaking load designed to be more than 6 times the rated load of the rocker arm 2, dynamically sharing the load and providing redundant protection.

[0039] In extreme conditions, if rocker arm 2 breaks, the fall arrestor chain 3 instantly becomes the sole load-bearing component. The pre-tension design ensures the chain immediately tightens, preventing a fall. The damping system synchronously triggers ultimate compression: guide rod 55 pushes the metal rubber pad 56 to compress the second spring 57 to its limit stroke (≥80% free length). After the third spring 58 is fully compressed, the bottom wall of the mounting cylinder 51 directly contacts the metal rubber pad 56, forming a rigid support to prevent overload failure. If the mounting frame 1 accidentally loosens, the suspension rope 6 (safety factor ≥8) will bear the entire weight, preventing structural collapse.

[0040] After the impact, the elastic potential energy of the third spring 58 drives the guide rod 55 to reset, and the buffer pad 53 disengages from the rocker arm 2. The elastic memory effect of the metal rubber pad 56 ensures the component resets, the sealing sleeve 7 automatically restores its seal, and the system enters standby mode. This device, through a triple architecture of "active buffering - passive protection - emergency support," reduces the fall risk to 10⁻. 6 The scale is fully compliant with the safety requirements of GB / T 3811-2008 Crane Design Specification.

[0041] The advantages of the anti-fall device for the rocker arm of the coal chute airlock provided by this utility model are as follows: This anti-fall device integrates multiple safety protections. The parallel structure of the rocker arm and the anti-fall chain ensures the stability of the equipment, while the anti-fall chain serves as a visual inspection point for easy maintenance. The damping rod design combines the buffering and shock absorption functions of springs and metal rubber pads, effectively reducing the rocker arm's swaying stress and extending its service life. The suspension rope fixing bracket provides a stable and reliable installation platform, while the sealing sleeve protects the internal structure from dust, enhancing its working life. Furthermore, the mounting bracket can be adjusted according to the shape of the coal chute, offering strong adaptability. In summary, this device provides comprehensive protection for the safe operation of the coal chute airlock.

[0042] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

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