Filter membrane locking device for low-concentration sampling head

The utility model provides a low-concentration sampling head filter membrane locking device, which relates to the technical field of samplers and comprises a locking shell, an adaptive end is integrally formed at the bottom of the locking shell, mounting grooves are formed in the left side surface and the right side surface of the adaptive end in a penetrating manner, and locking components are mounted in the mounting grooves. The clamping assembly is installed on the side end surface of the locking assembly, through cooperation of the locking assembly, during use, force is applied to the lifting frames on the two sides, so that the stress rods move on the two sides of the stress frames, under the action of the return springs, the lock heads are inserted into the insertion grooves, and then the low-concentration sampling head filter membrane is fixed and locked; according to the sampling device, the situation that when the sampling head is replaced, a filter membrane of the sampling head is loosened, reinstal