Mandril trolley cooling device for seamless steel tube puncher

Abstract

The invention discloses a mandril trolley cooling device for a seamless steel tube puncher. The mandril trolley cooling device comprises a mandril trolley inner cooling water pipe fixed on a mandril trolley, a mandril inner cooling water pipe arranged in a mandril, a cylinder, a connecting pipe, a cooling source water pipe and a cooling water hose, wherein the tail end of the mandril inner cooling water pipe is connected with the front end of the mandril trolley inner cooling water pipe, a piston rod of the cylinder is a hollow pipe and is provided with a first end and a second end, and the first end and the second end respectively stretch out a cylinder body; one end of the connecting pipe is connected with the tail end of the mandril trolley inner cooling water pipe, the other end of the connecting pipe is matched with the first end of the piston rod of the cylinder; and one end of the cooling water pipe is connected with the second end of the piston rod of the cylinder, and the other end of the cooling water hose is connected with one end of the cooling source water pipe. According to the invention, on / off of a cooling water pipeline is controlled by virtue of the cylinder, thus an external cooling water pipe drag chain and a long external cooling water pipe do not need to be arranged, manufacturing cost and maintenance cost are reduced, and production efficiency is improved.

Description

technical field [0001] The invention relates to a seamless steel pipe piercing equipment, in particular to a cooling device for a push rod trolley of a seamless steel pipe piercing machine. Background technique [0002] Tube blank piercing is one of the important processes in the production of hot-rolled seamless steel pipes. This process is to wear and roll solid tube blanks into hollow capillary tubes. It is the first process of metal deformation. The main equipment used in this process is a piercer. [0003] During the piercing process, the main motor drives the rollers to rotate, the ejector pin moves to the working position with the ejector trolley, the pre-rotation mechanism of the ejector trolley drives the ejector pin to rotate, and the billet pusher pushes the tube blank to the piercing position for piercing. In the production process of hot-rolled seamless steel pipes, the perforated plug at the front end of the ejector rod is used as an internal deformation tool, ...

AI Technical Summary

Problems solved by technology

During the capillary tube production process, the ejector trolley 1 needs to reciprocate at high speed and frequently between the piercing position and the ejector pole position, and the external cooling water pipe 5 and the external cooling water pipe drag chain 6 also move frequently along with the ejector trolley 1. Therefore, it is prone to wear and aging, and frequent maintenance and replacement are required during use, which increases maintenance costs and replacement costs, and reduces production efficiency; at the same time, the stroke of the ejector trolley running forward and backward is related to the length of the capillary after perforation , when the capillary length of production is larger, the required external cooling water pipe 5 and the external cooling water pipe drag chain 6 length will be very long, thereby increasing the manufacturing cost; in addition, the external cooling water pipe 5 and the external cooling water pipe drag chain 6 are arranged on the top The side of the rod trolley 1, so that the entire seamless steel pipe piercing machine ejector trolley cooling device occupies a large area

[0006] Therefore, the traditional cooling device for the ejector trolley of the seamless steel pipe piercing machine has high cost and low production efficiency

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