Semi-automatic anti-reverse mechanism
By designing a semi-automatic anti-reverse mechanism, the equipment shaft is automatically separated by an anti-rotation wheel and a support structure, solving the problem of equipment reverse rotation control and achieving rapid and safe anti-reverse rotation of the equipment and improving maintenance efficiency.
Patent Information
- Application Number
- CN202520268720.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-02-19
AI Technical Summary
In production equipment, when the equipment stops running, the pressure difference before and after the impeller changes, causing it to reverse. This makes it impossible to close the inlet and outlet valves in time, leading to equipment failure, wear and tear, and difficulty in starting up. This is especially true for equipment without valves or that is not easy to close.
Design a semi-automatic anti-reverse mechanism, including an anti-rotation wheel, a shaft, a support, and a safety bar. Utilizing the inclined surface of the support and the elastic force of the spring, the anti-rotation wheel is automatically separated from the equipment shaft to prevent reverse rotation, and the mechanism automatically resumes normal operation when the equipment is started.
It enables rapid and safe anti-reverse operation of the equipment, protects the equipment, improves maintenance efficiency and safety, and avoids equipment wear and start-up difficulties.
Smart Images
Figure CN223662409U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to mechanical equipment technical field, and specifically relates to a kind of semi-automatic anti-reverse mechanism. BACKGROUND
[0002] In production device, there is often pump, fan and other equipment when stopping running due to the pressure difference change of impeller front and rear occurs reverse situation, this situation is closed in time import and export valve to eliminate reverse. Some equipment has no import and export valve, or import and export valve is not suitable to close, equipment reverse will not be controlled. Equipment reverse can bring fault, such as: some fastening nut when equipment reverse rotation can be loose;Equipment always reverse causes unnecessary wear and tear to equipment;The reverse speed of equipment usually cannot reach normal operating speed, for the bearing box of splash lubrication mode, lubricating oil cannot reach the delivery effect of normal operating time, and bearing damage can occur due to lack of oil or poor lubrication;Equipment restart will increase starting torque, and it is difficult to start for the second time without controlling reverse. SUMMARY
[0003] The utility model provides a kind of semi-automatic anti-reverse mechanism, the purpose is to prevent equipment reverse quickly and safely, and anti-reverse mechanism is automatically separated safely when equipment starts, to ensure that equipment is normally operated.
[0004] A kind of semi-automatic anti-reverse mechanism is arranged on equipment shaft, and it is characterized by: including anti-reverse wheel, pivot, support and bumper, anti-reverse wheel is arranged on the outer edge of equipment shaft, anti-reverse wheel is equipped with circular arc side and straight line side on both sides of circular arc side, support is L type, pivot is arranged at corner, and pivot is installed on pivot frame, the top surface outer side of support bottom cross brace is inclined downward to form inclined surface, the rear side of support is equipped with U-shaped rod frame, bumper is installed on rod frame, the end of bumper close to support is round head, and spring is arranged on the part of bumper in rod frame.
[0005] The utility model has the beneficial effect that when the speed of equipment reduces to 0, the bumper is pulled to right, at the same time, the support of anti-reverse mechanism is close to anti-reverse wheel, so that the support is pressed against anti-reverse wheel, and equipment stops reverse rotation, so that the purpose of preventing reverse is achieved. When equipment starts, equipment rotates forward, the rotation of anti-reverse wheel makes the support rotate to right, the cross brace of support is downward, the round head of bumper enters the inclined surface of cross brace of support, and the support vertical brace is further moved to right under the action of spring force, so that the support is completely separated from equipment pivot, and the purpose of automatic separation is achieved. Bumper prevents the support from rotating to left, and eliminates the danger that the support is close to equipment pivot. The mechanism solves the problem of equipment reverse control, and equipment is protected. If equipment fails and needs to be repaired, semi-automatic anti-reverse mechanism can make the fault be treated in time, improve the repair efficiency, and ensure the safety of repair. BRIEF DESCRIPTION OF DRAWINGS
[0006] Figure 1 is a semi-automatic anti-reverse mechanism forward rotation state diagram.
[0007] Figure 2 is a semi-automatic anti-reverse mechanism anti-reverse state diagram.
[0008] Wherein: 1 - equipment shaft, 2 - anti-rotation wheel, 3 - support, 4 - rotating shaft, 5 - rotating shaft bracket, 6 - pole bracket, 7 - bumper, 8 - spring. DETAILED DESCRIPTION
[0009] Example 1: a semi-automatic anti-reverse mechanism, provided on the equipment shaft 1, the mechanism includes an anti-rotation wheel 2, a rotating shaft 4, a support 3 and a bumper 7, the anti-rotation wheel 2 is provided on the outer edge of the equipment shaft 1, the anti-rotation wheel 2 is provided with a circular arc side and a straight side on both sides of the circular arc side, the support 3 is L-shaped, the rotating shaft 4 is provided at the corner, and the rotating shaft 4 is installed on the rotating shaft bracket 5, the bottom of the support 3 is inclined downward to form an inclined surface on the top surface of the cross brace, the rear side of the support 3 is provided with a U-shaped pole bracket 6, the bumper 7 is installed on the pole bracket 6, the end of the bumper 7 close to the support is a round head, and the bumper 7 is provided with a spring 8 outside the part located in the pole bracket 6.
[0010] In a company's ammonia synthesis device cooling tower fan, the speed slows down during shutdown, and the fan does not stop after the speed is 0, but rotates in the opposite direction and continuously accelerates, the speed can reach 220 revolutions per minute. This situation causes the equipment cannot be overhauled; if the fan is standby, the semi-automatic anti-reverse mechanism is installed on the equipment shaft 1 of the fan, when the speed of the fan decreases to about 0, the bumper 7 is pulled to the right, and the support 3 is close to the anti-rotation wheel 2, so that the support abuts against the straight side of the anti-rotation wheel 2, the fan stops rotating in the opposite direction, thereby achieving the purpose of anti-reverse. When the fan starts, the equipment rotates forward, the circular arc side of the anti-rotation wheel pushes the support 3 to the right, the cross brace of the support 3 is downward, the round head of the bumper 7 enters the inclined surface of the cross brace of the support 3, and the spring 8 further moves the vertical support of the support to the right under the action of the spring force, completely separates from the rotating shaft of the fan, and achieves the purpose of automatic separation. The bumper 7 prevents the support 3 from rotating to the left, and prevents the support 3 from being close to the equipment shaft 1 of the fan.
Claims
1. A semi-automatic anti-reverse mechanism, mounted on a machine shaft, characterized in that: It includes an anti-spinning wheel, a rotating shaft, a support, and a safety bar. The anti-spinning wheel is located on the outer edge of the equipment shaft and has a rounded edge and straight edges on both sides of the rounded edge. The support is L-shaped, with a rotating shaft at the corner and the rotating shaft is mounted on a rotating shaft frame. The outer side of the top surface of the bottom cross brace of the support slopes downward to form a slope. A U-shaped frame is set on the rear side of the support, and a safety bar is installed on the frame. The end of the safety bar near the support has a rounded head, and a spring is sleeved on the part of the safety bar located inside the frame.