The purpose of the invention is to overcome the shortcomings of the prior art and develop a new centrifugal pipe casting machine with higher production efficiency, better quality, greater economic benefits, easier operation and mastery by workers and less environmental pollution.
The key point of the invention is to separate the speed regulating mechanism from the braking mechanism and increase the mechanical braking, that is, an independent speed regulating device and an independent braking device are composed of an electromagnetic speed regulating motor, an eddy current brake and a mechanical braking brake. Due to the proper power and configuration (electromagnetic braking and mechanical braking are combined into one, this machine is 22KW, which is 25HP compared with similar machines in the United States), the starting acceleration performance of this machine (from 100 rpm to 100 rpm, only 3.5s) is twice that of SPK——6A centrifugal pipe casting machine in the United States. This advantage is mainly reflected in the fact that the radial wall thickness of the cast pipe can be very uniform and the casting is compact. On the other hand, the braking performance of this machine (only 2 seconds from 1 100 to zero rotation) is more than twice as fast as that of the above-mentioned American machine (because the eddy current braking is slow at low speed, but the combined braking of this machine is fast, and there is no high-speed friction heating), which is mainly conducive to improving productivity; At the same time, both sides of the center of gravity of the whole combination, including rollers and pulleys, are supported by double bearings, so it is very stable and vibration-free at high speed, ensuring the high quality of the produced pipes.
The machine is also equipped with an automatic quantitative and automatic pouring device consisting of a moving ladle and a computer. The errors of the automatic quantitative device for pouring molten iron are all within the standard range of the outlet pipe (such as φ 4 ″× 6 ′-22kg, with the error not greater than1kg). The invention has the advantages of reasonable structure, easy manufacture and remarkable economic benefit, and the productivity of the machine can reach at least 30 pieces per hour.
The whole device is safe and reliable, and the operation and management are convenient. It is suitable for pipe casting plants and engineering machinery plants as the main equipment for producing cast iron sewage pipes, and also suitable for continuous production of pipes with hot blast stoves and hot metal in small and medium-sized iron and steel plants.
The attached drawing is a schematic plan of the horizontal centrifugal pipe casting machine designed according to the present invention, in which [1] is an electromagnetic speed regulating motor, [2] is a mechanical brake, [3] is a belt (and a pair of pulleys), [4] is an eddy current brake, [5] is a gear coupling (with a bearing bracket beside it), [6]. [9] refers to the pipeline guide rail and limiting device, [10] refers to the mold [1 1] refers to the roller and double-clamp bearing bracket, [12] refers to the pouring trough, and [13] refers to the pouring truck.
claim of right
1. A centrifugal casting machine for cast iron sewage pipes consists of speed regulating and braking devices, a pouring trolley, a spraying trolley and a metal mold. It is characterized in that the machine has independent speed regulating and braking devices, and is equipped with an automatic metering device for molten iron and a double bearing bracket.
2. According to the claim
1 centrifugal casting cast iron sewage pipe machine, which is characterized by an independent braking device consisting of eddy current brakes and mechanical brakes.
3. According to the claim
1 2 centrifugal casting machine for cast iron sewage pipe is characterized in that the automatic quantitative automatic pouring device for molten iron consists of a movable ladle and an electronic computer.
4. According to the claim
1 2 centrifugal casting machine for cast iron sewage pipe is characterized in that the focus of the whole assembly (including rollers and pulleys) is supported by double bearings to bear radial load and prevent radial jump.
Patent abstract
The invention relates to a machine for centrifugally casting cast iron sewage pipes, belonging to the technical field of special casting centrifugal casting.
. Characterized in that the independent speed regulating device and the independent braking device are composed of an electromagnetic speed regulating motor, an eddy current brake and a mechanical brake, and are equipped with an automatic hot metal metering device and a double bearing bracket. The cast iron pipe produced by this machine has good quality and high production efficiency. This machine is not only used to produce high-quality sewage pipes in pipe casting plants and construction machinery plants, but also used to continuously produce pipes from hot blast stoves in small and medium-sized iron and steel plants.