Radiator Tube Expanding Machine, Radiator Tube Expander, Hydraulic Tube Expansion Machine
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Pneumatic-hydraulic tube expander consists of three parts, electric control part, air-driven booster system, and expander. Electric control adopts PLC control. The gas-driven booster system uses two sets of Sucente high-pressure liquid boosters. It can boost the pressure quickly, and the boost time within a pipe diameter of 25mm and a length of 5m reaches the predetermined pressure within tens of seconds. It includes three parts: supercharger host, high-pressure rubber hose, and expansion head ferrule tooling. The high-pressure tube expander is divided into radiator tube expander and heat exchanger tube expander. The heat exchanger tube expander has low labor intensity and high production efficiency; the expansion joint quality is uniform and reliable; the expansion medium has no pollution to the joint; The residual stress of the rear tube is low; the heat exchanger with any thickness of the tube sheet can be expanded in the whole process; the hydraulic expansion can not only ensure the quality of the expansion joint, prolong the life of the heat exchanger, but also improve the work efficiency and reduce the labor cost. In the maintenance and installation of the heat exchanger, the pneumatic hydraulic tube expander solves the problems of long construction period and high labor cost, which makes the high hydraulic tube expander more and more popular in these enterprises.
Radiator Tube Expansion Machine, Hydraulic Expansion Machine for Radiator Tube, Tube Expander Machine, Tube Expander, Hydraulic Tube/Pipe Expanding Machine
The hydraulic tube expander is mainly composed of three components: the expansion shell (maintainer), the expansion ball (steel ball), and the expansion rod (mandrel). The expansion ball and expansion rod are made of Gcr15 bearing steel, and the expansion shell is made of 45# medium carbon steel through heat treatment process, which improves the angle (HRC55°～60°) and toughness. The inner eight-character trapezoidal chute is opened on the expansion shell to prevent the expansion beads from falling. Rod (the tube expander should be used as the energy source for batch expanding tubes), the expanding rod drives the expanding bead, and the expanding bead then drives the expanding shell. The axis of the expansion rod is promoted; with the gradual expansion of the expansion rod with a taper, the inner hole and outer diameter of the expanded child are gradually expanded, so that it is closely combined with the tube sheet to reach the means of connection.
Before expanding the adjustable tube expander, the positioning sleeve must be adjusted to the proper position through the adjusting nut according to the requirements of the expansion joint length, and the positioning screw must be tightened, and then used according to the above four operating methods of the tube expander.
Steel shell-and-tube heat exchangers are widely used in chemical production. Whether it is a fixed tube sheet, a floating head tube sheet, or a U-shaped shell-and-tube heat exchanger, the connection between the tube and the tube sheet is a very important structure in the heat exchanger. and links.
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The quality of the expansion mainly depends on the radial residual compressive stress on the pipe end, and its value is the same as whether the material and size of the pipe and the tube sheet are grooved, the expansion rate, the radial gap between the pipe and the tube sheet, and the surface roughness, etc. factors. In order to obtain good and stable expansion performance, in addition to strictly controlling the machining accuracy of the tube sheet and ensuring the appropriate hardness difference between the tube sheet material and the tube material, it is also necessary to correctly select the tube expander, tube expander power and control means to ensure proper expansion. Degree and take a reasonable expansion sequence.
The tube expansion operation can be divided into two types: forward type and backward type. The forward type is to insert the frame into the tube, rotate the mandrel, advance and squeeze, and after reaching the predetermined tightening degree, the motor reverses and pulls out from the tube to complete the tube expansion process.
The complete configuration of the pneumatic tube expander includes:
Operation steps of hydraulic tube expander:
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