Views: 0 Author: Site Editor Publish Time: 2022-09-26 Origin: Site
The flat car is widely used in the production of coal mines. It is the main transport device of the mine transport pump station, mobile transformer, switch, etc., and moves forward with the advance of the mining face. Due to the special working conditions of the underground working face, if the flat car does not have a reliable braking device when it is pushed to the inclined mining face, it may move on its own on the track, causing potential safety hazards. In this case, a screw type braking device can be used. The braking device has reliable performance and good use effect. With the spiral braking device, reliable braking can be achieved only by turning the handle of the braking device, which can solve the problem of slip of the mining flat car in the process of advancing the inclined mining face. This device is only applicable to the braking of flatbed truck in static state, not applicable to the braking during traveling.
The braking device adopts the screw transmission principle. The main screw is fixed on the flatbed truck, clamped by the screw, and the main part of the braking is moved downward by rotating the screw. The rail surface is compressed from the upper side, the left and right brake arms clamp the rail web, and the three opposite rails are clamped to prevent the flatbed truck from sliding by itself. When the flatbed truck needs to move, the screw drive is used to open the brake arms on the left and right sides, and the main part of the brake is lifted up along the slideways on both sides to avoid hindering the normal travel of the wheels. According to the service conditions, special attention shall be paid to the reliability and practicability of the braking device, and the matching installation with the main flat car shall be taken into account.
The main body of the braking device is composed of a screw rod, a nut, an upper connecting rod, a lower connecting rod, a brake arm and a connecting pin. The screw rod drives the nut up and down by means of a thread drive to generate a compression force; The nut simultaneously plays the role of preventing the transmission pressure of the connecting rod from rotating when it is matched with the chute; The upper connecting rod mainly connects the nut with the brake arm and transmits the pressure; The lower connecting rod is used to twist the two brake booms and ensure that the clamping position is the rail center, so as to prevent the left and right offset of the compression center; The brake arm effectively clamps the webs on both sides of the track by lever action.
Recently, the Jining High-tech Zone General Trade Union and the Human Resources Department of Jining High-tech Zone jointly announced the 2024 'High-tech Craftsman' list. Li Zhenbo, General Manager of Information Technology at China Coal Group and General Manager of Zhongyun Group, was awarded the title of 'High-tech Craftsman' for his outstanding contributions and innovative spirit.
On September 30th, China Coal Group held a grand cultural performance to celebrate the 75th anniversary of the founding of the People's Republic of China with the theme of 'Forging Ahead to Celebrate the Birthday of the People's Republic of China' in the conference center. The chairman of China Coal Group, Mr. Qiu Qing, the general manager of China Coal Group, Mr. Han Yong, and all the members of the leadership team of China Coal Group attended the event and witnessed the grand celebration together with more than 1,000 employees on the spot. The cultural performance was conducted in the way of 'on-site + webcast', aiming to show the spirit of the cadres and workers of China Coal Group and express the love and blessing to the great motherland through colorful cultural programs.
On September 29th, in this season of autumn and fruitfulness, China Coal Group, full of joy and pride, participated in the ‘Harvest Celebration and National Day’, which was jointly organized by Jining Hi-Tech District Federation of Trade Unions and Jiezhuang Street to welcome the 75th anniversary of the founding of New China and the Farmer's Harvest Festival.
