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Prestress high intensity concrete square pile and its production method and moulding die

The invention belongs to the architecture field, which relates to an improvement with the foundation pile shape and the structure and the manufacturing method of the foundation pile and the foundation pile shaper in the architecture field, in particular the invention is a prestressing force high strength concrete square pile and the manufacturing method thereof and the shaping device. In the invention a square terminal plate is disposed on the two ends of the square pile, and the four sides of the terminal plate is provided with a groove, while the center is equipped with a circular hole, and between the circular hole and the four sides, a strain hole and a threading hole are arranged symmetrically; a stirrp of a reinforcement cage in a twist is welded on the principal reinforcement continuously, wherein the principal reinforcement is the steel strand or the steel bar; the concrete square pile and the four-side corners of the terminal plate are in a stress elimination arc, and the pile core is a columnar mid level outlet having the same diameter with the terminal plate central circular hole. The manufacturing method is characterized in that, the principal reinforcement has the fix ed length and blanking, and the stirrp of the reinforcement cage is welded in the seam welder with the high degree of mechanisation; the principal reinforcement is stretched in a group of a whole pile fixed value, wherein the stretching performance is good and the balance is consistent; the disposable high pressure has short shaping time, low energy consumption, high product grade; the die design meets with the shaping requirement of the shape, which is convenient to use.
Owner:SHANGHAI ZHONGJI PILE IND

Method for making coal fine into form coke by microwave energy

The invention relates to a method for producing formed coke, in particular to a method for preparing coal powder into the formed coke by microwave. The method adopts coal powder as raw material and comprises the following steps: sieving the coal powder for preparing fine coal powder, sending the fine coal powder into a first microwave heating device for dehydration until the water content of the heated fine coal powder is below 1 percent, and sending the heated fine coal powder into a second microwave heating device by a conveying device for dry distillation; performing the dry distillation to the fine coal powder by the second microwave heating device to analyze other materials in the coal powder, preparing carbocoal after the dry distillation, sending the carbocoal into a mixer by the conveying device to prepare the mixture after adding bonding material; sending the mixture to a forming machine by a conveyer for forming so as to prepare a formed coke semi-finished product; sending the reformed coke semi-finished product into a third microwave heating device for being heated and carbonized to prepare red coke, and sending the carbonized red coke into a coke car to prepare a formed coke product. The invention has low production cost, high production efficiency, cleanness and environment protection because coke powder and waste are not produced during the production.
Owner:唐山金强恒业压力型焦有限公司

Electric pressure cooker cover opening and closing signal feedback device

The invention discloses an electric pressure cooker cover opening and closing signal feedback device. When a cover body of the electric pressure cooker is in a closed position, a conductive ball is in a switched-on position, and a first conductor and a second conductor are switched on by the conductive ball; when the cover body of the electric pressure cooker is in an opened position, the conductive ball is in a switched-off position, the first conductor and the second conductor are switched off. According to the electric pressure cooker cover opening and closing signal feedback device, an electronic switch in the prior art is replaced by a mechanical switch; the structure is simple; the electric pressure cooker cover opening and closing signal feedback does not need to rely on the switching on and off of electric, magnetic and optical control switches; the position of the conductive ball is changed by means of the self gravity of the conductive ball by only changing the position of the cover body; the switching on or off of the first conductor and the second conductor is used as a signal for controlling the heating of the electric pressure cooker; when the position of the cover body is changed, the opening and closing of the cover body are directly related to the heating; the reliability is higher; the control switch is unlikely to damage even when the control switch is used in the high-temperature and high-humidity environment for a long time; the use safety can be ensured; the manufacture and maintenance costs are low.
Owner:GUANGDONG LUBY ELECTRONICS
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