6results about How to "High compression force" patented technology

The utility model discloses a compression mechanism hydraulic system of a garbage collection vehicle and a working method of the compression mechanism hydraulic system in the field of hydraulic systems, which comprises a push plate oil cylinder, a scraper oil cylinder and a sliding plate oil cylinder, and a compression valve block, a back pressure valve block and a plurality of reversing valves are arranged corresponding to the push plate oil cylinder, the scraper oil cylinder and the sliding plate oil cylinder. The hydraulic oil tank supplies oil to the push plate oil cylinder, the scraper oil cylinder and the sliding plate oil cylinder through the duplex hydraulic pump, the reversing valves, the compression valve block and the back pressure valve block. The garbage compression device can improve the garbage compression rate and compression efficiency, plays a role in protecting the compression mechanism, and is convenient for personnel to maintain.

This invention relates to wood-plastic composite (WPC) production technology, and more particularly to a micro-foaming molding equipment and method for WPC door panels. The WPC door panel micro-foaming molding equipment includes an extruder and an extrusion die. The extrusion die includes a flow-collecting module, within which a mandrel is disposed. Vertical baffles are arranged between the mandrels, and the upper and lower end faces of the baffles are fixedly connected to the flow-collecting module. This invention features a novel structure. The baffles divide the WPC material into several material units, ensuring that each material unit does not interfere with others and that cross-flow does not occur between material units. This guarantees balanced material flow and consistent material pressure in each material unit, and maintains stable friction between the material units and the mandrels.

A precise forming and manufacturing method for a spatial arc-shaped thin-wall structure relates to the field of precise forming of high-precision arc-shaped thin-wall structures, and comprises an upper female die, a lower female die, a left male die, a right male die and a positioning pin, the upper female die and the lower female die are consistent in structure and are symmetrical about an XOY plane, and the left male die and the right male die are consistent in structure and are symmetrical about a YOZ plane. A locating pin special hole is formed in the symmetric line of the upper female die and the lower female die, a thin-wall forming structure blank is installed between the upper female die and the lower female die, a locating pin penetrates through the locating pin special hole and a locating pin hole, and the upper female die and the lower female die are fixed through a fixing assembly. The inner arc surfaces of the upper female die and the lower female die are respectively designed according to upper and lower theoretical curved surfaces of the arc-shaped thin-wall structure; the left male die and the right male die are connected to the two sides of the upper female die through fixing assemblies, the left male die and the right male die are connected with the lower female die through fixing assemblies, and the die inner cambered surfaces of the left male die and the right male die are designed according to the left theoretical curved surface and the right theoretical curved surface of the arc-shaped thin-wall structure respectively. And high-precision manufacturing of the unit arc-shaped thin-wall structure is achieved.

The present invention provides a plunger type pressure limiting valve, comprising a valve body, a plunger, a spring, a sealing ring, and a screw plug; the valve body is provided with a valve hole, and a first oil inlet hole, an oil drain hole, and a second oil inlet hole communicated with the valve hole; the plunger comprises a large diameter section and a small diameter section, the large diameter section and the valve hole are in clearance fit, the small diameter section is inserted into the sealing ring after passing through the spring, and is in clearance fit with the inner hole of the sealing ring, and the outer peripheral surface of the sealing ring and the valve hole are in transition fit; the screw plug comprises an outer section and an inner section, the outer section is provided with an external thread, the inner section is provided with a radial oil through hole, the end face of the inner end of the screw plug is provided with an axial blind hole, and the blind hole intersects with the oil through hole; the first oil inlet hole is communicated with the inner end of the valve hole, the oil drain hole corresponds to the peripheral surface of the large diameter section of the plunger, the second oil inlet hole corresponds to the inner section of the screw plug, and there is a gap between the inner section and the inner wall of the valve hole; the first oil inlet hole and the second oil inlet hole are both used to access high-pressure oil. The present invention can prevent the pressure limiting valve from opening prematurely at high speed.

The application discloses a kind of abdominal belts comprising: waist support part is set to be located in the waist area of user and extend to the both sides of user when wearing;First abdominal compression part is connected with the first side of waist support part, is set to extend along the abdomen when wearing;Second abdominal compression part is connected with the second side of waist support part, is set to extend along the abdomen when wearing;First abdominal compression part and second abdominal compression part are detachably connected, and provide compression force to the abdomen of user when being connected;And back support, arranged on waist support part, back support includes at least one support strip, support strip extends along the height direction of user when abdominal belt is worn, support strip is gradually curved and extends along the direction close to the back of user from both ends to middle when abdominal belt is worn.Such as above, the application can improve the support degree and comfort of the back support of abdominal belt.

The invention relates to the technical field of choke valves, and discloses a puncture outfit choke valve which comprises a choke valve body mounted in a puncture outfit body, the choke valve body comprises a mounting ring mounted with the puncture outfit body, an annular valve is fixedly connected to the inner side wall of the mounting ring, and the annular valve is integrally in a wide-end-down form. Two symmetrical V-shaped first notches are formed in the side face of the end, away from the mounting ring, of the annular valve, a V-shaped second notch is formed in the end, away from the mounting ring, of the annular valve, and a kerf is formed in the position of the second notch. According to the choke valve, the whole annular valve is in the shape with the wide upper portion and the narrow lower portion, the first notch and the second notch which are in the V shape are matched, the inward extrusion compression force of the end, away from the mounting ring, of the annular valve is increased, and the effect that the choke valve body can be closed under the condition that the pressure difference is small is achieved.