41results about How to "Avoid local stress" patented technology

The invention discloses a book block flattening machine. The book block flattening machine comprises a rack, a rotary table rotationally installed on the rack, a hydraulic cylinder fixedly connected with the rotary table, a pressing assembly rotationally installed at the output end of the hydraulic cylinder and an adjusting assembly driving the rotary table to rotate, wherein the output end of thehydraulic cylinder is arranged downwards; the pressing assembly comprises a pressing plate horizontally and rotationally installed at the output end of the hydraulic cylinder, pressure equalizing rods evenly arranged on the hydraulic cylinder and pressing wheels installed on the pressure equalizing rods at intervals along the axes of the pressure equalizing rods, wherein the pressing wheels abutagainst the pressing plate; and each pressing wheel comprises a U-shaped mounting plate, a roller rotationally installed in the mounting plate and a supporting shaft vertically and fixedly connected with the outer wall of the bent position of the mounting plate, and a corresponding mounting hole is formed in the side, facing the pressing plate, of each pressure equalizing rod. According to the book block flattening machine, stress can be more uniform in the book block flattening process, and the flattening effect is improved.

A segmented protection device for a drill pipe comprises: a cylindrical body (1), wherein multiple annular grooves are arranged on the cylindrical body (1), the annular grooves divide the cylindrical body (1) into multiple rigid portions, and flexible portions (2) are arranged in the annular grooves; the flexible portion (2), comprising a leather layer (4), wherein multiple fixed rings (15) are arranged on both a top portion and a bottom portion of the leather layer (4); multiple bolts (16) and nuts (17) matching the bolts (16); an annular filling chamber, wherein the annular filling chamber is filled with multiple first balls (5) and multiple second balls (6), and the diameter of the first ball (5) is 8 to 15 times the diameter of the second ball (6); and multiple protection mechanisms (3), wherein at least one bolt (16) and at least one nut (17) are disposed in the protection mechanisms (3). The compressive strength at different points of the cylindrical body (1) is different, and the addition of the lower-cost flexible portion (2) not only reduces production costs of the cylindrical body (1), but also facilitates transportation and storage steps of the cylindrical body (1). The cylindrical body (1) can be adapted for a variety of soil environments, thereby improving the universality of a protective sleeve.

The utility model relates to a non-contact liquid-jet grinding head for gas-sealed liquid pumping for numerical control polishing, which belongs to the liquid-jet grinding head involved in the technical field of optical cold processing. The technical problem to be solved is to provide a non-contact liquid jet grinding head for gas-sealed liquid pumping for numerical control polishing. The technical solutions to be solved include hollow grinding head, polishing liquid outlet hole, collecting plate connecting frame, polishing liquid collecting plate, air inlet hole, air curtain groove, liquid pumping hole, liquid collecting tank, etc.; the polishing liquid collecting plate connects with the collecting plate connecting frame The shaft sleeve of the grinding head is fixedly connected and set on the hollow grinding head; the first air inlet hole of the polishing liquid collecting plate communicates with the first air curtain groove, and the first air curtain groove communicates with the gap between the hollow grinding head and the polishing liquid collecting plate; The second air inlet hole of the polishing liquid collecting plate communicates with the second air curtain groove, and the second air curtain groove communicates with the lower working surface of the polishing liquid collecting plate; The liquid pumping hole communicates with the space outside the polishing liquid collection plate; the polishing liquid outlet holes are distributed on the working surface of the hollow grinding head.

The invention provides a treating and repairing method for antique calligraphy and painting folds. Physical means and chemical means are matched to eliminate the folds. The method includes the first step of carrying out deacidifying treatment on centers of the antique calligraphy and paintings needing to be repaired; the second step of additionally attaching snake-shaped strips to disconnected folds with centers which are deacidified and cleaned, wherein in the deacidifying treatment step, magnesium bicarbonate solutions are uniformly sprayed to the centers and remain at the surfaces of the centers for 5-15 minutes, and the centers are cleaned for standby application. The method further includes the third step of restoring the centers through heating stress and additionally attaching the snake-shaped strips; the fourth step of smoothening and attaching the centers and arranging the centers on silk materials. Due to the fact that the centers of the antique calligraphy and paintings are acid after being oxidized and corroded in air for a long time, acid accumulation occurs, original natures of center paper are changed, the folds are continuously produced, the deacidifying treatment is carried out on the centers, internal factors are solved from the perspective of the centers, heat reduction and silk material covering for strengthening are matched, the folds can be eliminated fundamentally, time is saved, and repair efficiency is high.

A non-contact liquid-spraying grinding head for the numerally controlled polishing is composed of a hollow drive shaft and a hollow grinding head with an internal cavity and several polishing liquid spraying-out holes. Its advantages are high polishing quality.

The invention relates to a modularly assembled copper alloy tension net cage and an assembly method thereof, comprising a vertically stressed high-strength polyester fiber ribbon, a main skeleton ribbon standard part and a horizontally secondary stressed high-strength polyester fiber ribbon The standard part of the sub-skeleton webbing is fixed at the intersection point of the cross to form a grid-shaped single-side cage box webbing skeleton with flexibility and elasticity; in each frame of the single-side cage box webbing skeleton, Through the assembly of pre-installed quick connectors and prefabricated copper alloy tensile mesh standard modules, a modular assembled net cage box side net is formed; both sides of the unilateral side net are connected by quick connectors or several sheets The side and side nets are equipped with corner flexible transfer standard parts and assembled with the bottom net to form a copper alloy tensile net cage body. The invention can be modularized and standardized for production, and is convenient for rapid installation at sea, and has the performance of well maintaining the marine culture net cages against marine fouling organisms, and maintaining good water exchange inside and outside the net cages.

The invention provides a PVC pipe tail head device, including a pipe body and a tail end head, the tail end head is installed at the tail of the pipe body, and the tail end head includes a pressure dividing ring outside the pipe, an annular slot, and a sealing ring pad The inner wall of the pressure dividing ring outside the pipe is socketed with the outer surface of the pipe body, and the surface of the pressure dividing ring outside the pipe is inserted into the inner wall of the annular slot, which relates to the field of PVC pipes. The plugging structure designed by the PVC pipe tail head device can act on the inside and outside of the pipeline at the same time, and the impact of water flow can be used to enhance the sealing effect and the tightness of the connection. The multi-stage partial pressure weakens the impact of the structure and prolongs the service life. The structure can be quickly disassembled in a simple way, which effectively solves the problem that the general head needs to bear a large impact force when it is used, the force-bearing part has poor ability to disperse pressure, and is prone to leakage. The damage has a great impact on the pipeline, and it is inconvenient to repackage.

The invention discloses a semitrailer shipment detection device. The semitrailer loading detection device comprises a car hopper, the car hopper comprises a bearing plate, a supporting assembly is arranged on the lower part of the bearing plate, the bearing plate is fixedly connected with the supporting assembly, the supporting assembly comprises transverse beams and longitudinal beams, the transverse beams and the longitudinal beams are set at 90 degrees, and the transverse beams and the longitudinal beams are all fixedly connected with the lower surface of the bearing plate; and protective plates are connected to the two sides of the bearing plate in a hinged mode, detection assemblies are arranged between the transverse beams and the longitudinal beams, display plates are arranged abovethe detection assemblies, limiting grooves are formed in the protective plates, and the display plates are slidably connected with the limiting grooves. The semitrailer shipment detection device is used for solving the problems one side of a semitrailer bears extremely high pressure and the probability of occurrence of danger further increases dramatically due to the fact that a weight differencebetween the left and right sides on the bearing plate provided in the background technology is too large.

A steel pipe concrete pouring exhaust device and its construction method, including a fixed frame, an exhaust pipe and a lower cone head; the fixed frame is T-shaped, including a horizontal bar and a vertical bar; Inserted in the steel pipe, the length of the exhaust pipe is adapted to the height of the concrete to be poured; the upper end of the exhaust pipe is sleeved on the vertical bar, and is connected with the vertical bar through the first bolt; on the wall of the exhaust pipe, There are exhaust holes spaced apart vertically, and the exhaust holes are inclined holes that gradually slope downward from the inside to the outside; the lower cone head is set at the bottom of the exhaust pipe and is conical; the tip of the lower cone head faces downward ; There is a connecting short rod in the middle of the top of the lower cone head; the connecting short rod is plugged into the lower end of the exhaust pipe and connected with the exhaust pipe through the second bolt. The invention solves the technical problems of cumbersome construction, uneven concrete pouring, uneven concrete pouring and uneven local stress at the vent hole of the steel column wall existing in the traditional construction method of pouring concrete.