Emergency device for short stroke electromagnet brake release failure

Abstract

An emergency device for short-stroke electromagnetic brake release failure. This invention relates to the field of gate hoist technology. It includes a frame, a nut, and a screw. The frame is rectangular with an opening at one end. Lugs are formed at both ends of the frame at the opening, and a pair of lugs connect to the two ends of an electromagnetic coil in the release mechanism. The release mechanism also includes iron cores and electromagnetic armatures located on both sides of the electromagnetic coil. The release mechanism is located on one side of the brake's upright frame. The nut is connected to the middle of the other end of the frame. The frame has a central hole communicating with the nut. The screw is movably connected to the nut and passes through the central hole. One end of the screw inside the frame is connected to a tray, and the other end outside the frame is connected to a handwheel. The electromagnetic armature is located inside the frame, and the tray is used to contact the electromagnetic armature. This invention can effectively solve the problem of electromagnetic brake release failure.

Description

Technical Field

[0001] This utility model relates to the field of gate hoisting technology, and in particular to an emergency device for short-stroke electromagnet brake release failure. Background Technology

[0002] Sluice gates are crucial control structures in water conservancy projects, serving as a primary means of scientifically managing and regulating floods and ensuring water resource supply. Among numerous sluice gate projects, winch-type gate hoists are the most widely used opening and closing machinery. During years of operation and management, staff have observed that winch-type gate hoists are prone to brake seizure and release failure during prolonged periods of disuse and initial commissioning. This can lead to abnormal gate slippage, gate shoe seizure, and inability to open and close normally. In particular, AC short-stroke electromagnetic brakes fail to activate during the release process after power is applied, posing a risk of damage and hazard to mechanical and electrical equipment, thus affecting the safe and efficient operation of the sluice gate.

[0003] Currently, the brakes equipped on winch-type gate hoists mainly include various types such as electromagnet drum brakes, electro-hydraulic drum brakes, and pneumatic caliper disc brakes. Among them, the electromagnet drum brake is the most widely used due to its large braking torque, sensitive braking, reliable operation, and simple structure.

[0004] Taking the coaxial main and auxiliary drum fixed winch type gate hoist of the Wanfu Gate Project in the Huaihe River-Yangtze River Waterway as an example, this type of gate hoist adopts an AC short-stroke electromagnetic drum brake (hereinafter referred to as electromagnetic brake), model TJ2--200, equipped with an AC single-phase braking electromagnetic armature, model MZD1--200, and the brake adopts an open electromagnetic actuation mechanism. During the process of releasing the electromagnetic brake, the actuator is often affected by various factors such as approaching the service life, harsh on-site environment, inadequate maintenance, and human error. Insufficient attraction of the electromagnetic armature can lead to failure to properly engage with the iron core. If the operator does not handle the fault in time, the electromagnetic coil is prone to overheating or even burning out, which may even cause damage to the electromechanical equipment and affect the safety of gate opening and closing.

[0005] How to handle safety accidents caused by electromagnetic brake release failure in a timely and effective manner is an urgent problem that engineering managers need to solve in the safe operation of sluice gates. Utility Model Content

[0006] To address the above problems, this utility model provides an emergency device for short-stroke electromagnetic brake release failure that is simple in structure, easy to operate, and has improved reliability.

[0007] The technical solution of this utility model is: an emergency device for short-stroke electromagnet brake release failure, comprising a frame, a nut, and a screw.

[0008] The frame is rectangular and has an opening at one end. Lugs are formed at both ends of the frame at the opening. A pair of lugs are connected to the two ends of the electromagnetic coil in the brake release device. The brake release device also includes an iron core and an electromagnetic armature located on both sides of the electromagnetic coil. The brake release device is located on one side of the upright plate frame in the brake.

[0009] The nut is connected to the middle of the other end of the frame, and the frame has a central hole communicating with the nut. The screw is movably connected to the nut and passes through the central hole.

[0010] The screw is connected to the tray at one end inside the frame and to the handwheel at the other end outside the frame.

[0011] The electromagnetic armature is located within the frame, and the tray is used to contact the electromagnetic armature.

[0012] It also includes a rubber pad, which is placed on the tray; the rubber pad is used to contact the electromagnetic armature.

[0013] The frame is made of stainless steel flat steel.

[0014] The upright frame includes a pair of brake arms, with a lead screw between the pair of brake arms.

[0015] The brake release device is located on the outside of a brake arm.

[0016] It also includes a stainless steel scale, which is mounted on the brake arm and located on one side of the lead screw.

[0017] The diameter of the central hole is slightly larger than the diameter of the screw.

[0018] In operation, after the frame is securely fastened to the electromagnetic coil, the handwheel is rotated clockwise. The screw and nut generate a helical drive, and the tray at the top of the screw firmly supports the electromagnetic armature. The handwheel is rotated continuously until the electromagnetic armature is attracted to the iron core, effectively solving the problem of electromagnetic brake release failure. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In the drawings, the parts are not necessarily drawn to scale.

[0020] Fig. 1 This is a structural schematic diagram of the present invention.

[0021] Fig. 2 This is a diagram showing the usage status of the emergency device in this utility model;

[0022] Fig. 3 This is a structural diagram of the lead screw and stainless steel scale.

[0023] In the diagram, 1 is the frame, 2 is the nut, 3 is the screw, 4 is the tray, 5 is the rubber pad, 6 is the handwheel, 7 is the iron core, 8 is the lead screw, 9 is the brake arm, 10 is the brake shoe, 11 is the brake wheel, 12 is the motor drive shaft, 13 is the electromagnetic armature, 14 is the iron core coil, 15 is the stainless steel ruler, 16 is the opening, and 17 is the lug. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] This utility model is as follows Figs. 1-3 As shown, the emergency device for short-stroke electromagnet brake release failure includes a frame 1, a nut 2, and a screw 3.

[0028] The frame 1 is rectangular and has an opening 16 at one end. Lugs 17 are formed at both ends of the opening on the frame. A pair of lugs are connected to the two ends of the electromagnetic coil in the brake release device. The brake release device also includes an iron core and an electromagnetic armature located on both sides of the electromagnetic coil. The brake release device is located on one side of the upright plate frame in the brake.

[0029] The nut 2 is connected to the middle of the other end of the frame. The frame has a central hole that communicates with the nut. The screw is movably connected to the nut and passes through the central hole.

[0030] The screw 3 is connected to the tray 4 at one end inside the frame and to the handwheel 6 at the other end outside the frame.

[0031] The electromagnetic armature 13 is located inside the frame 1, and the tray is used to contact the electromagnetic armature.

[0032] The upright frame includes a pair of brake arms (i.e., left and right brake arms), the brake includes left and right brake arms 9, and a main spring, a secondary spring and a lead screw 8 are provided above the left and right brake arms. The electromagnetic armature 13 is connected to one side above the right brake arm through a pair of support plates.

[0033] The emergency device in use includes a hot-rolled stainless steel flat steel frame 1, an M12 screw 3, a nut 2, a round head tray 4, and a stainless steel handwheel 6;

[0034] Hot-rolled stainless steel flat steel frame: Selected hot-rolled stainless steel flat steel with 4mm wall thickness, which has good plasticity. Processed by bending process, the flat steel frame is a whole, and the structural strength meets the operation requirements of the equipment.

[0035] M12 screw and nut, drill a hole in the center of the rear facade of the flat steel frame. The diameter of the hole is slightly larger than the diameter of the screw. Use an electric welding machine to weld the M12 nut to the flat steel frame so that the screw can pass through the nut for helical drive.

[0036] A round-headed tray 4 is a steel round-headed tray installed at the top of the screw, serving as the component that directly contacts the electromagnetic armature. Considering the long-term, high-frequency operation of the device for pushing and engaging, irreversible damage to the armature surface is inevitable between the steel round-headed tray and the electromagnetic armature. Therefore, a rubber pad 5 is installed at the front end of the tray to cushion the contact between the two steel components.

[0037] Stainless steel handwheel 6: A Φ60mm stainless steel handwheel is installed at the rear end of the screw to control and adjust the screw propulsion process of the emergency device;

[0038] A stainless steel scale 15 is installed on the right side of the lead screw to measure whether the working stroke of the lead screw is within the acceptable range during the brake release and engagement process. Based on the electromagnetic armature engagement stroke of 3.8mm, the working stroke of the brake lead screw is planned to be between 2mm and 4mm, with 3mm being the optimal value based on working experience.

[0039] The specific structure and operation process of the brake are conventional technical means. For details, please refer to the article "Application Analysis of Short-Stroke Electromagnetic Slab Brake for Sluice Gate Hoist", published on the Science and Technology Forum, article number: 1671-5659(2018)3-0306-02.

[0040] In operation, after the stainless steel flat steel frame is securely clamped onto the electromagnetic coil 14, the handwheel is rotated clockwise. The screw and nut generate a helical drive, and the round plate at the top of the screw firmly presses against the electromagnetic armature. The handwheel is rotated until the electromagnetic armature 13 is attracted to the iron core 7. At this time, the armature presses against the lead screw through the stop, forcing the lead screw to move axially. The brake shoe separates from the brake wheel, thereby completing the brake release action and effectively solving the problem of electromagnetic brake release failure. Fig. 2 The middle arrows represent the rotation of the stainless steel handwheel and the direction of screw movement, respectively.

[0041] When it is necessary to restore the brake, rotate the handwheel counterclockwise. The round-headed tray retracts until it is fully released. At this time, the electromagnetic armature separates from the iron core, and the electromagnetic armature is pulled back to its initial position. The brake shoe 10 grips the brake wheel 11, achieving the braking effect. When the brake wheel 11 moves, it is driven by the motor drive shaft 12.

[0042] This invention has been successfully applied to the AC short-stroke electromagnetic brake of the Wanfu Gate hoist. On-site demonstration shows that the device installation and the release action of the faulty brake can be completed in only about 20-30 seconds, without any damage to the brake body, and the stroke of the device's spiral propulsion can be accurately measured and adjusted.

[0043] This emergency device is characterized by its reliability, low failure rate, and economic applicability. It is suitable for emergency handling and maintenance of hoist-type gate openers using similar electromagnet brakes, greatly improving the emergency response capabilities of employees and effectively ensuring the safe and reliable operation of the project.

[0044] In practical applications, in addition to being used in winch-type gate hoists, emergency devices can also be applied to lifting machinery equipped with electromagnet brakes, such as gantry cranes, overhead cranes, and hydrological cableway winches, and have wide applicability and promotional value.

[0045] Regarding the information disclosed in this case, the following points need to be clarified:

[0046] (1) The accompanying drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case. Other structures can refer to the general design.

[0047] (2) Where there is no conflict, the embodiments and features disclosed in this case can be combined with each other to obtain new embodiments;

[0048] The above are merely specific embodiments disclosed in this case, but the scope of protection of this disclosure is not limited thereto. The scope of protection disclosed in this case shall be determined by the scope of protection of the claims.

Claims

1. An emergency device for short-stroke electromagnet brake release failure, characterized in that, Includes frame, nuts, and screws. The frame is rectangular and has an opening at one end. Lugs are formed at both ends of the frame at the opening. A pair of lugs are connected to the two ends of the electromagnetic coil in the brake release device. The brake release device also includes an iron core and an electromagnetic armature located on both sides of the electromagnetic coil. The brake release device is located on one side of the upright plate frame in the brake. The nut is connected to the middle of the other end of the frame, and the frame has a central hole communicating with the nut. The screw is movably connected to the nut and passes through the central hole. The screw is connected to the tray at one end inside the frame and to the handwheel at the other end outside the frame. The electromagnetic armature is located within the frame, and the tray is used to contact the electromagnetic armature.

2. The emergency device for short-stroke electromagnet brake release failure according to claim 1, characterized in that, It also includes a rubber pad, which is placed on the tray; the rubber pad is used to contact the electromagnetic armature.

3. The emergency device for short-stroke electromagnet brake release failure according to claim 1, characterized in that, The frame is made of stainless steel flat steel.

4. The emergency device for short-stroke electromagnet brake release failure according to claim 1, characterized in that, The upright frame includes a pair of brake arms, with a lead screw between the pair of brake arms. The brake release device is located on the outside of a brake arm.

5. The emergency device for short-stroke electromagnet brake release failure according to claim 4, characterized in that, It also includes a stainless steel scale, which is mounted on the brake arm and located on one side of the lead screw.

6. The emergency device for short-stroke electromagnet brake release failure according to claim 1, characterized in that, The diameter of the central hole is slightly larger than the diameter of the screw.

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