Hot melting connecting method of plastic composite pipe and connecting device used by same

一种塑料复合管的热熔连接方法及所使用的连接装置

Abstract

本发明涉及一种塑料复合管的热熔连接方法及所使用的连接装置,连接方法采用热熔承插连接方式,即:预先设置相连接端的一节塑料复合管的管口内径与另一节塑料复合管的管口外径相当,连接时,分别将上述两节复合管连接端的小口径管口外表面和大口径管口内表面用模具加热至熔融状态,然后去掉加热装置,迅速将两节管子的加热表面插接到一起,冷却后完成两节管的连接;连接装置,在夹持塑料复合管道的同一轴线方向上依次设置有一定夹具组、内表面热熔器、外表面热熔器、一动夹具组,其中,定夹具组和动夹具组分别固定在一液压柱塞系统的柱塞连架和油缸连架上,内表面热熔器和外表面热熔器分别固定在一加热板的正反面上,并一起固定在一悬置活动支架上。有益效果:通过扩口、热熔插接连接,操作方便,连接可靠,易于加工,连接成本低,适用于埋地等长管路的连接,尤其符合1.6MPa以下压力的钢丝网骨架塑料复合管道的连接要求。
The invention relates to a hot melting connecting method of a plastic composite pipe and a connecting device used by the same. The hot melting connecting method adopts a hot melting socket connectingmode, and comprises the following steps: presetting the pipe mouth inside diameter of one section of plastic composite pipe at a connected end to be equivalent to the pipe mouth outside diameter of the other section of plastic composite pipe; when in connection, heating the outer surface of a minor-caliber pipe mouth and the inner surface of a major-caliber pipe mouth at the connecting end of twosections of composite pipes to be in a fusing state; and removing a heating device, socketing heating surfaces of two sections of composite pipes together and connecting two sections of composite pipes after cooling. The connecting device is sequentially provided with a fixed clamp group, an inner surface hot melter, an outer surface hot melter and a movable clamp group in the same axial directionof clamping the plastic composite pipeline, wherein the fixed clamp group and the movable clamp group are respectively fixed on a plunger piston connecting rack of a hydraulic plunger piston system and an oil cylinder connecting rack, and the inner surface hot melter and the outer surface hot melter are respectively fixed on front side and the back side of a heating plate and fixed together on asuspended movable bracket together. The hot melting connecting method and the connecting device have the advantages of realizing the connection in the flaring and hot melting socket modes, having convenient operation, reliable connection, easy processing and low connecting cost, being suitable for connection of buried pipelines and other long pipelines and particularly according with the connecting requirements of plastic composite pipelines of steel wire frames with the pressure less than 1.6Mpa.

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