Construction method for concrete shaft wall module masonry

The present invention relates to a masonry construction method of the wall modules of a concrete shaft wall. The method includes eight steps: (1) the excavation of earth: according to location dimension, the excavation of earth is carried out; (2) the casting of foundation cushion concrete: according to positioning sidelines and an elevation, the foundation cushion concrete is casted; (3) the casting of foundation mat concrete; (4) the masonry of the wall modules: according to the sizes of the arranged blocks, the wall modules are piled up and the masonry matches holes, so that upper-lower and left-right tongue-and-grooves are aligned with one another; (5) the infusion of concrete: the concrete is compacted by a vibrating rod or a steel reinforcement; (6) the installation of precast lintels and cover slabs: slab joints are caulked; (7) the masonry of an inspection well; (8) the backfilling of earth: unbackfilled trenches around the wall body are backfilled at the same time. Because the ...

PVC water-proof coiled material

The invention relates to a PVC waterproof coil material which mainly comprises a buffer layer, a PVC material layer and a protective layer. The buffer layer and the PVC material layer are welded and jointed by PVC gaskets; and the protective layer is fixedly adhered to the PVC material layer in a point mode. The PVC waterproof coiled material has the characteristics of high tensile strength, large elongation, good weather resistance, wide range of the service temperature, and the like and the advantages of cold operation, simple and convenient construction, the reduction of environment pollution, the improvement on the labor conditions, and the like, not only makes up the defects of the yield and the performance of paper base asphalt felt, but also can effectively reinforce the impermeable performance of a waterproof layer of the coiled materials, prolong the waterproof durable time of the coiled materials, improve the integral quality of the waterproof layer, ensure that the waterproof ...

Florfenicol microcapsule and preparation method thereof

The invention discloses a florfenicol microcapsule which is prepared by the following method: (1) preparing a gelatin solution from gelatin, glycerin and distilled water; (2) adding the gelatin solution prepared in the step (1) in florfenicol, grinding and dripping an acetate solution and a sodium sulfate solution; (3) cooling and then adding a formaldehyde solution and a sodium hydroxide solution; (4) standing for delamination, removing supernatant liquid, performing suction filtration, washing with water, and finally drying in reduced pressure vacuum at 50 DEG C to 60 DEG C. A simple coacervation method is adopted to prepare the florfenicol microcapsule and the method has the advantages of simple process, high encapsulation rate reaching 80 percent to 85 percent, and strong operability.The florfenicol microcapsule prepared by the method can cover the bitter taste of florfenicol drugs, improve the stability of drugs and reduce the stimulation to animal stomaches, thereby being better applied ...

Florfenicol microcapsule and preparation method thereof

The invention discloses a florfenicol microcapsule which is prepared by the following method: (1) preparing a gelatin solution from gelatin, glycerin and distilled water; (2) adding the gelatin solution prepared in the step (1) in florfenicol, grinding and dripping an acetate solution and a sodium sulfate solution; (3) cooling and then adding a formaldehyde solution and a sodium hydroxide solution; (4) standing for delamination, removing supernatant liquid, performing suction filtration, washing with water, and finally drying in reduced pressure vacuum at 50 DEG C to 60 DEG C. A simple coacervation method is adopted to prepare the florfenicol microcapsule and the method has the advantages of simple process, high encapsulation rate reaching 80 percent to 85 percent, and strong operability.The florfenicol microcapsule prepared by the method can cover the bitter taste of florfenicol drugs, improve the stability of drugs and reduce the stimulation to animal stomaches, thereby being betterapplied ...

Concrete well wall module

The invention relates to a concrete well wall module which comprises a left side frame, a right side frame and connecting arrises, and the upper datum plane, the lower datum plane, the front datum plane and the rear datum plane of the left side frame and the right side frame are respectively and correspondingly provided with grooves and convex arrises. The concrete well wall module is characterized in that a middle groove is arranged in the middle part of the upper datum plane of each connecting arris, and a middle convex arris is arranged in the middle part of the lower datum plane; and the middle convex arris is in arc connection with the left side frame and the right side frame. The connecting plane of the middle groove and the left side frame and the connecting plane of the middle groove and the right side frame are respectively provided with two grooves. The middle groove and the middle convex arris are arranged, so the invention enhances the shearing resistant performance. Meanwhile ...

Automatic braid-cutting device and working method for sewing of overedging machine

The invention relates to an automatic braid-cutting device and a working method for sewing of an overedging machine. The prior industrial overedging machine basically completes the process of cutting remained thread-braids by a manually cutting mode; even if an automatic braid-cutting device is arranged, the machine is not suitable to be applied in large scale because of complicated structure, difficult operation, high cost, and the like. The automatic braid-cutting device comprises a controller, an inductor, a main shaft, an electromagnetic drive device and a cutting mechanism, wherein a stitching counter is arranged inside the controller; a speed regulator is arranged below a bedplate; the stitching counter and the main shaft are in electrical connection; the speed regulator and the inductor are connected into the controller in parallel; the controller is connected with the electromagnetic drive device; and the cutting of remained thread-braids can be realized by counting delay through ...

Florfenicol acetic ester and preparation method thereof

The invention discloses florfenicol acetic ester. A preparation method of the florfenicol acetic ester comprises the following steps: adding acetic anhydride to florfenicol acetic ester and mixing, and then adding perchloric acid and stirring for dissolving, heating to 45 DEG C-50 DEG C and stirring for fully reacting for 3-4 hours; putting reaction products in an icewater bath for crystallizationafter the reaction is ended; carrying out suction filtration; then carrying out recrystallization in ethanol; carrying out suction filtration; washing crystal by ethane, then drying at the temperature of 60-80 DEG C, and finally obtaining florfenicol acetic ester. The florfenicol acetic ester increases water solubility and has low loss during the physiological disposition after being taken orallyand injected; the florfenicol acetic ester releases ester and florfenicol after being metabolized by in vivo biological enzyme, wherein ester overcomes the drug resistance of bacteria, and meanwhile,florfenicol ...

Construction method for concrete shaft wall module masonry