Drainage bottle protection device for wheelchair

The drainage bottle protection device comprises a box A, a box B, a fixing device, a sliding rod, a hook and a lock catch, the face, facing the wheelchair, of the box A and the box B serves as the front face, the box B extends into the box A and is in sliding connection with the box A, the sliding rod is arranged on the front face of the box A and the front face of the box B, the sliding rod is in a circular arc shape, and the sliding rod is in sliding connection with the fixing device. Hooks are arranged on the side faces of the box A and the box B, holes are formed in the front face and the back face of the box A, a lock catch is arranged on the upper portion of the end, extending into the box A, of the box B, openings are correspondingly formed in the bottom faces of the box A and the box B, and the box A, the box B and the hooks are made of stainless steel. The size of the containing cavity can be changed according to drainage bottles of different sizes or numbers, it is guaranteed that the drainage bottl