英语学习工具包

STRAIGHT FIN FOR DEVICE FOR RECOVERING AND REMOVING WASTE HEAT OF RAW COKE OVEN GAS IN RISER OF COKE OVEN, AND HEAT REMOVAL DEVICE

A straight fin for a device for recovering and removing waste heat of raw coke oven gas in a riser of a coke oven, comprising a straight fin body (1) and a group of V-shaped notches (2) disposed on the straight fin body (1). The depth h of the V-shaped notches (2) is less than the width H of the straight fin body (1). The distances between the adjacent V-shaped notches (2) increase from bottom to top in the longitudinal direction of the straight fin body (1). Also provided are a heat removal device and a power generation device both comprising the straight fin. The straight fin is simple in structure, low in cost, and convenient to use, and can enhance the heat transfer performance of a raw coke oven gas side, and increase the temperature of a wall surface. Moreover, the width, the angle and the distances in the height direction of the V-shaped notches (2) at the top of the straight fin are determined according to the temperature field distribution during use.

Efficient manual lossless soil column sampling device

The invention relates to an efficient manual lossless soil column sampling device. The device comprises a support frame; the propelling mechanism can move up and down; the sampling mechanism is connected with the propelling mechanism and comprises a sampling barrel upper section, a sampling barrel lower section, a sampling inner container and an elastic leather film, the sampling barrel upper section and the sampling barrel lower section are spliced with each other and are provided with a hollow channel which is through up and down, the sampling inner container is further fixedly arranged in the hollow channel, and the elastic leather film is arranged in the sampling inner container. The side wall of the sampling barrel upper section and the side wall of the sampling barrel lower section are further provided with communicated ventilation hole channels in the direction of the hollow channel, openings in the upper ends of the ventilation hole channels are further connected with an external ...

Box type non-negative pressure variable frequency water supply equipment

The invention discloses box type non-negative pressure variable frequency water supply equipment which comprises an equipment body, a filtering box body is connected to the equipment body, a power mechanism is arranged on the filtering box body, a vertical shaft is arranged on the power mechanism, a transmission mechanism is arranged on the vertical shaft and the inner top of the filtering box body, a sliding frame is arranged on the transmission mechanism, and the sliding frame is connected with the filtering box body. And a push-pull mechanism is installed at the top in the filtering box body, the sliding frame extends into the push-pull mechanism, a synchronous rod is arranged on the push-pull mechanism, and a bearing box is fixed to the bottom in the filtering box body. Force conversion can be achieved through the arrangement of paddles, corresponding structure operation can be rapidly adjusted through automatic parts, water can be filtered, impurities can be fully cleaned, meanwhile ...