Check valve without pin hole

The utility model provides a check valve with a pin hole. The check valve comprises a valve body, a valve clack, a spring, a pin shaft, a locating pin and a locating block, wherein a liquid inlet and a liquid outlet are formed in the valve body, the valve clack is arranged in an inner cavity between the liquid inlet and the liquid outlet and hinged on the pin shaft, the pin shaft and the locating pin are both installed on the locating block in the inner cavity of the valve body, the locating block is fixedly installed on the valve body, and the spring capable of guaranteeing elastic opening and closing of the valve clack is arranged between the valve clack and the pin shaft. The pin shaft and the locating pin are assembled through the movable locating block to be assembled on the valve body to be fixed through screws. Thus, holes directly drilled on the valve body are avoided, the leakage risk of the check valve is reduced, and the reliability of the check valve is improved.