Cooling jacket for double-wall corrugated pipe

Abstract

The invention provides a cooling jacket for a double-wall corrugated pipe. The cooling jacket comprises an inner jacket, an outer jacket coaxially sleeved on the outer side of the inner jacket, a distributor located at one end part of the inner jacket, a cooling liquid inlet pipe mounted on the distributor, and a cooling liquid outlet pipe mounted at the other end part of the inner jacket. A cooling cavity for a cooling liquid to flow is formed between the outer jacket and the inner jacket. A first annular groove and a second annular groove are arranged along the circumference of the distributor. The first annular groove is communicated with the cooling liquid inlet pipe. The distributor is further provided with a plurality of primary liquid outlets which are communicated with the first annular groove and the second annular groove, and with a plurality of secondary liquid outlets which are communicated with the second annular groove and the cooling cavity. The primary liquid outlets and the secondary liquid outlets are separately and uniformly distributed on the distributor along the circumference of the distributor.

Description

technical field [0001] The invention relates to a cooling jacket of a double-wall corrugated pipe, which is used for cooling the inner wall of the corrugated pipe during the forming process of the double-wall corrugated pipe. Background technique [0002] During the production process of the double-wall corrugated pipe, the shape of the outer wall is determined by the crest shape and distribution position of the inner wall of the forming module. The inner surface of the inner wall is formed on the outer surface of the cooling jacket, and the outer surface of the inner wall is extruded and bonded with the trough of the inner surface of the outer wall of the forming module to form the inner and outer walls of the double-wall bellows. The existing inner wall cooling method is to adopt a simple water cooling method for cooling, wherein the water cooling jacket usually includes an outer jacket and an inner jacket, an annular water cooling chamber is formed between the inner jacke...

AI Technical Summary

Problems solved by technology

However, since there is only one coolant inlet, researchers often find that the cooling speed of the inner wall near the coolant inlet is fast, while the cooling speed is slow at the place far away from the coolant inlet. The cooling rate is not uniform, so the ring stiffness and ring compliance of the bellows are poor

[0003]In order to overcome the above-mentioned uneven cooling problem, the traditional technology mainly improves the uniformity problem by increasing the flow rate of cooling water and increasing the effective contact area, but it still exists Disadvantages, the increase of coolant flow rate will cause waste of coolant on the one hand, and on the other hand, with the increase of liquid pressure, it will lead to the need to improve the sealing performance of the system, and the high-demand sealing equipment not only increases the equipment cost but also makes it difficult to realize

Therefore, the traditional cooling method has the disadvantages of poor effect and low efficiency, and the inner surface quality of the product is not uniform, which seriously affects the ring stiffness and ring flexibility of the product.

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