Pipeline cooling system for high-modulus test bed and control method

The invention provides a pipeline cooling system for a high-modulus test bed and a control method.The pipeline cooling system comprises a water spraying system and a control system, the water spraying system comprises a peripheral water spraying system and a center water spraying system, the peripheral water spraying system is a water spraying opening formed in the circumferential inner side of the pipe wall of a diffusion injection device, and the center water spraying system is a water spraying opening formed in the circumferential inner side of the pipe wall of the diffusion injection device; the central water spraying system is a water pipe arranged in the radial direction of the diffusion injection device, the two ends of the water pipe are connected with the pipe wall, an injector is installed on the water pipe, the water spraying system is controlled by the control system, and electric signals are transmitted to the signal conditioning circuit through a thermocouple installed on the pipe wall of the di