5results about How to "Reduce cracking damage" patented technology

This utility model relates to the field of civil engineering technology, specifically to a large-diameter prestressed pipe pile with bending resistance, including a prestressed pipe pile mechanism. The prestressed pipe pile mechanism includes a pipe pile body one and a pipe pile body two. The bottom end of the pipe pile body one is provided with the pipe pile body two. During use, the pipe pile body one, the pipe pile body two, and the clamping mechanism are disassembled for transportation. After arriving at the site, the pipe pile body one and the pipe pile body two are connected together by the clamping mechanism and then put into use. During use, a connecting buffer plate is clamped at the connection between the pipe pile body one and the pipe pile body two.

The invention discloses a negative spacing photovoltaic module which comprises a battery layer which comprises battery strings connected in series in sequence, each battery string comprises battery pieces connected in series in sequence, and the battery pieces are in lap joint in sequence; the two adhesive film layers are stacked on the two faces of the battery layer respectively and comprise adhesive film bodies, the adhesive film bodies are integrally connected with protruding strips, the protruding strips are adjacently distributed in the length direction of the adhesive film layers and extend in the length-width direction of the adhesive film layers, and the protruding strips abut against the battery layer; and the two glass plates are in one-to-one correspondence with the two adhesive film layers and are laminated on the surfaces, far away from the battery layer, of the corresponding adhesive film layers. According to the negative spacing photovoltaic module, the convex strips are arranged on the adhesive film layers on the upper and lower sides of the battery layer, and the convex strips are in contact with the battery layer, so that the stress contact area of the battery pieces is increased, the stress uniformity of the battery pieces during lamination is improved, the possibility of hidden crack damage of the battery pieces is reduced, and the production quality of the module is guaranteed.

The frost crack prevention water mixer comprises a water mixing channel shell and a frost crack prevention mechanism, the water mixing channel shell is provided with a cold water inlet, a hot water inlet, a water mixing cavity, a pressure relief opening and a plurality of water outlets, and the cold water inlet, the hot water inlet, the pressure relief opening and the water outlets are all communicated with the water mixing cavity; the frost crack prevention mechanism comprises a fixing block, a diaphragm and an elastic piece, the fixing block and the diaphragm are fixedly connected to the pressure relief opening, the diaphragm seals the pressure relief opening, one end of the elastic piece abuts against the fixing block, the other end of the elastic piece is fixedly connected with a cushion block, and the elastic piece is used for driving the cushion block to move in the direction away from the fixing block so that the cushion block can abut against the diaphragm. According to the frost crack prevention water mixer, the expansion volume of ice can be absorbed, and the possibility that the water mixing channel shell and the valve are cracked and damaged is reduced.

The utility model discloses a kind of anti-crack oil exploitation drill bits, including the drill bit main body of metal material, the installation handle is fixedly installed on drill bit main body upper end, and the installation handle outside is equipped with installation thread, the diamond drill bit of high-strength alloy material is installed in the drill bit main body lower surface, and the drill bit main body lower surface is equipped with water outlet, and the drill bit main body and installation handle are set to hollow structure, the installation ring is installed in the installation handle lower end outside, and the fixed plate is fixedly installed in the installation ring outer surface.This anti-crack oil exploitation drill bit adopts novel structure design, drill bit main body is connected with drilling equipment by the installation thread outside installation handle, installation ring is installed in the installation handle outside in this process, stable roller is set in the outside of installation ring, stable roller is supported in the borehole inner wall in the process of drill bit drilling, reduce the overall shaking of drill bit, reduce the crack damage of drill bit main body due to shaking impact.

The application provides a light-emitting angle adjusting device and a lighting device. The light-emitting angle adjusting device comprises a shell, a sliding piece and an assembling piece. The shell is provided with a receiving groove for accommodating a light-emitting piece and an optical piece. One end of the sliding piece is connected to the outer wall of the light-emitting piece or the outer wall of the optical piece. The assembling piece is arranged around the peripheral wall of the receiving groove, is accommodated in the receiving groove and is connected to the shell. The side of the assembling piece close to the groove bottom of the receiving groove is provided with a wedge-shaped notch, and the wedge-shaped notch and the groove bottom of the receiving groove together enclose a threaded slide. When the assembling piece is connected to the shell, the other end of the sliding piece slides into the wedge-shaped notch and is clamped at the threaded slide, and the sliding piece is slidingly connected at the threaded slide. The light-emitting angle adjusting device can improve the assembly yield, reduce the assembly difficulty and improve the adjustment stability of the light-emitting angle of the lamp.