38results about How to "Reasonable space arrangement" patented technology

The invention provides a tibia-astragalus-calcaneus joint fusion outer side dissection locking steel plate, which comprises a plate-shaped tibia fixing part, an astragalus fixing part and a calcaneus fixing part, wherein the tibia fixing part, the astragalus fixing part and the calcaneus fixing part are fixedly connected in sequence; the astragalus fixing part and the calcaneus fixing part are bent into arc forms along the width direction of the tibia fixing part; an angle of 125-135 degrees is formed between the calcaneus fixing part and the tibia fixing part; the length of the astragalus fixing part is 2.5-3 centimeters; the length of the calcaneus fixing part is 4-5 centimeters; and the tibia fixing part, the astragalus fixing part and the calcaneus fixing part are provided with at least one steel nail fixing hole. The tibia-astragalus-calcaneus joint fusion outer side dissection locking steel plate provided by the invention is more consistent with the outer side dissection state of a tibia-astragalus-calcaneus joint, and is jointed with the distal end of the tibia as well as the surfaces of outer side skeletons of the astragalus and calcaneus; moreover, the space arrangement of screw holes is more reasonable, the steel plate is easier and more convenient to use, and the fixing strength is higher; and the steel plate has the advantages of convenience in surgical operation, reliable fixing strength, reduction in local soft tissue tension and the like.

The invention relates to a learning table convenient to lift. The learning table convenient to lift comprises table legs, a storage box, a table top and an air feeding device. The pair of table legs comprise supporting plates, screw tubes, inserting rods and driving nuts; supporting rods are arranged on the ground in the front direction and the back direction; the inserting rods are inserted into the screw tubes in a sliding mode; the driving nuts comprise front shells and back shells; the storage box is fixed at the upper portions, close to the end faces, of the pair of screw tubes; the lower end face of the table top is respectively hinged to a pair of rotating shafts; the air feeding device comprises a drawing air bellow, an air feeding tube and a draught fan. An application method of the learning table includes the steps that 1, the height of the table top is rapidly adjusted; 1.1 the two driving nuts located on the same screw tube are pre-adjusted; 1.2, the two driving nuts on the other screw tube are adjusted in the mode in the step 1.1. By means of the learning table convenient to lift, the height of the leaning table can be conveniently adjusted, and two modes of rapidly adjusting and finely adjusting can be selected; the table top can be lifted to further conveniently take and place books between the table top and the storage box.

The invention relates to a gas distribution device and a gas water heater using the device, wherein the gas distribution device includes a housing, a rotating drum and a stepping drive mechanism, the housing is provided with a first air inlet and a nozzle, the rotating drum and the stepping The driving mechanism constitutes the blocking mechanism for blocking the nozzles. The rotating drum is located in the inner cavity of the housing and extends axially along the direction in which the nozzles are spaced apart. On the side wall of the rotating drum, there are at least two Each strip-shaped through-hole extends along the circumference of the drum and corresponds to a nozzle; the stepping drive mechanism drives the drum to rotate step by step, so that the strip-shaped through-holes rotate intermittently to the corresponding nozzle. In the present invention, a rotating drum is provided, and a strip-shaped through hole is opened on the rotating drum. Each nozzle corresponds to a strip-shaped through-hole. With the rotation of the rotating drum, different positions and different numbers of nozzles communicate with the strip-shaped through-hole correspondingly, so that Multiple nozzles can be opened at one time without opening one by one, and the gas flow adjustment method is convenient, quick and flexible.

A full-automatic preparation method of pre-blended dry-mixed mortar comprises the following steps that raw materials needed for preparing a pre-blended material are conveyed and stored for use; sand is conveyed into a sand drying device to be dried; the dried sand is conveyed to a sand particle separator through a lifting device, and fine sand and rough sand are separated out; the separated fine sand and rough sand are stored in corresponding sand tanks; the raw materials, which are stored for use, except the sand and the dried and separated sand are conveyed into a metering instrument in a sealed manner; a mixture is output by the metering instrument at a set raw material ratio; the mixture is lifted into a stirring device to be stirred to form the pre-blended material; the pre-blended material is output, and components of the pre-blended material are detected; the detected pre-blended material is stored for use, and then a pre-blended material finished product is obtained. The full-automatic preparation method of the pre-blended dry-mixed mortar has the advantages that the sand used as the raw material is dried and screened first of all, and therefore the pre-blended material product higher in quality is produced beneficially; the adopted metering device can adjust the weight of each component of the pre-blended material, so that the precision of ingredients is improved, andtherefore the mixed material meeting the set ratio requirement is obtained.