13results about How to "Small inner diameter" patented technology

The utility model discloses a cooling assembly for thread machining of a pen container, which comprises a thread machining mechanism, an outer cover is arranged in the thread machining mechanism, a cooling assembly is arranged on the outer cover, the cooling assembly comprises a cooling seat and an adjusting part, a mounting area is formed in the middle of the adjusting part, the cooling seat is arranged in the mounting area, and a fixing part is arranged on the cooling seat. A threaded hole is formed in the middle of the fixing part, a bolt is arranged in the threaded hole, a through hole is formed in the cooling seat, the adjusting part is arranged in the through hole, and the bolt is rotated to push the adjusting part in the through hole. According to the cooling assembly for thread machining of the pen container, the adjusting part can be extruded by rotating the bolt, so that a hose for conveying cooling liquid is pressed through the adjusting part, the hose is stressed to deform, the inner diameter of the hose is reduced, the drainage speed of the cooling liquid is reduced, and a tapping tool is convenient to cool and lubricate; and the use amount of cooling liquid is saved, and adjustment is convenient.

This invention discloses a method for forming hollow tubes based on low-shrinkage PEKK to achieve high-fidelity replication of the inner wall, belonging to the field of precision molding technology for high-performance thermoplastic polymers. The method includes the following steps: material selection, melt contact molding, inner wall morphology replication, shrinkage attachment control, rapid cooling and freezing, and demolding to obtain the finished product. This invention, through a series of structures and precise control of material shrinkage behavior, allows the inner wall morphology of the tube to directly replicate the surface of the mandrel. The roughness difference ΔRa between the inner wall of the tube and the surface of the mandrel is ≤0.3μm, truly achieving high-fidelity replication of the inner wall morphology and fundamentally solving the problem of large replication deviations in traditional molding processes.

The utility model provides a pushing tube, a guide wire and a guide wire system.The pushing tube is of a hollow and slender structure and comprises multiple sections distributed in the length direction of the pushing tube, the multiple sections comprise the pushing section and the detection section, the detection section is connected to the far end of the pushing section, the inner diameter of the detection section is larger than that of the pushing section, the detection section is used for containing a detector, and the detection section is connected to the far end of the pushing section. A detection window is arranged on the side wall of the detection section; the pushing section is provided with a far-end part which extends from the far end to the near end of the pushing section by a preset length, and the far-end part has a reduced outer diameter in the direction towards the far end. Compared with the change of the inner diameter of the pushing pipe, the change of the outer diameter of the pushing pipe has greater influence on the rigidity of the pushing pipe, the required performance of the pushing pipe can be achieved only with less processing amount, and the processing is more convenient.

The utility model relates to a high-strength fastening screw with a pressure-bearing structure, which is characterized in that the top of a mounting screw rod is movably sleeved with a bearing nut, the outer side of the bottom of the mounting screw rod is screwed with a transmission screw cylinder through threads, the outer side of the middle of the mounting screw rod is screwed with a fixed screw cylinder through threads, and the top of the mounting screw rod is movably sleeved with a reinforcing mechanism; after the top of the bearing nut is overlarge in pressure provided by the outer side, the bearing nut drives the rotating screw barrel and the sleeving screw barrel to vertically move on the outer side of the mounting screw, and the rotating screw barrel and the sleeving screw barrel are continuously subjected to abutting force abutting against the inner wall of the screw barrel in the downward moving process; further, the inner side walls of the rotating screw cylinder and the sleeving screw cylinder are tightly attached to the outer side wall of the mounting screw rod, the contact friction force of the outer side wall of the mounting screw rod to the inner side walls of the rotating screw cylinder and the sleeving screw cylinder is increased, the bearing nut cannot continuously move at will, and the stability of the whole mounting screw rod in the inserting and using process is improved from the top of the mounting screw rod.

The diversion tunnel flood discharge structure comprises a diversion tunnel, a flood discharge pipe, a pressurizing pipe and an air compressor, the flood discharge pipe is fixedly arranged, one end of the flood discharge pipe is connected with the water outlet end of the diversion tunnel, the other end of the flood discharge pipe is connected with a river channel, one end of the pressurizing pipe is connected with the flood discharge pipe, and the other end of the pressurizing pipe is connected with the air compressor. The inner diameter of the pressurizing pipe is smaller than that of the flood discharge pipe. The diversion tunnel flood discharge structure is simple in overall structure, high in flood discharge efficiency and low in construction difficulty and cost.

The utility model discloses an internal arteriovenous fistula internal diameter monitoring and protecting device which comprises a controller and a multifunctional cuff, and the controller is composed of a bandage, a hook-and-loop fastener, a plastic shell, a power button, a touch display screen, a charging interface, an air path interface, a circuit interface, a lithium battery, a single-chip microcomputer, an audio output module, a linear motor, a miniature air pump and a miniature electromagnetic valve. The multifunctional oversleeve is composed of an oversleeve body, a hook-and-loop fastener, an air channel connecting pipe, a circuit connecting pipe, an air bag, an MEMS ultrasonic patch, a flexible film temperature sensor and a graphene far infrared patch, and the circuit connecting pipe and the air channel connecting pipe of the multifunctional cuff are connected with a circuit interface and an air channel interface of the controller respectively. The pressure applied to the internal arteriovenous fistula is adjusted by detecting the inner diameter of the internal arteriovenous fistula, and meanwhile, the internal arteriovenous fistula is irradiated by infrared rays, so that the internal arteriovenous fistula can be monitored and maintained for a long time, and the formation of internal arteriovenous fistula aneurysm is prevented and treated.

This utility model relates to the technical field of conductive connection devices, specifically to a connector and its shielding cover and crimping sleeve. The connector includes a shielding cover and a crimping sleeve. The tail end of the shielding cover has at least one set of spring claws extending outwards from the head of the shielding cover. The crimping sleeve has a contact section and a crimping section for crimping the cable shielding layer. The contact section is fitted onto each of the spring claws in the same set. The side of the spring claws facing away from the center of the area enclosed by the same set of spring claws has a portion that abuts against the inner circumferential surface of the contact section of the crimping sleeve. Because the spring claws of the shielding cover are covered by the crimping sleeve, the gaps between the spring claws are blocked by the crimping sleeve. This allows the crimping sleeve to enclose the same set of spring claws, improving the tightness of the shielding enclosure and reducing the likelihood of electromagnetic leakage at the spring claw gaps affecting the shielding performance.

The utility model discloses a high-temperature-resistant and high-pressure-resistant sealing stop valve, and relates to the technical field of valves. The check valve comprises a valve body, a valve cover is arranged above the middle of the valve body, a valve rod is arranged in the valve cover, and the top end of the valve rod is connected with a hand wheel. A stop plate is arranged in the valve body, a valve clack assembly is arranged at the bottom of the valve rod and comprises a valve clack body rotationally connected with the valve rod, positioning rods are arranged at the four corners of the valve clack body, a sealing assembly is arranged at the upper end of the valve deck and comprises a sealing ring fixed in the upper side wall of the valve deck, and the upper side wall of the sealing ring is in threaded connection with a ring cover. A pressurizing ring is bonded to the inner wall of the sealing ring, and an inner cavity of the sealing ring communicates with the pressurizing ring. According to the utility model, the tightness of connection between the valve cover and the valve rod can be increased through the sealing assembly, the sealing performance between the valve cover and the valve rod is improved, and the valve clack assembly not only ensures that the valve clack body does not move when the valve rod rotates, but also ensures the stability when the valve clack body closes a medium channel.

This invention provides a heat exchange structure, an air conditioner, and a defrosting control method for the outdoor unit of an air conditioner. The heat exchange structure includes: a heat exchange pipe comprising a first pipe, a second pipe, and a third pipe connected in series, wherein the second pipe is located between the first pipe and the third pipe, the inner diameter of the second pipe is smaller than that of the first pipe, and the inner diameter of the second pipe is smaller than that of the third pipe; an air inlet is formed on the side of the first pipe away from the second pipe, and an air outlet is formed on the side of the third pipe away from the second pipe; a heat exchanger disposed in the second pipe; and a fan disposed on the side of the heat exchange pipe near the air inlet and the side of the heat exchange pipe near the air outlet. This invention solves the problems of increased costs due to the need to increase raw materials when improving the heat exchange capacity of the outdoor unit heat exchanger, and the inability of the indoor unit to continue heating during defrosting of the outdoor unit heat exchanger.

The application discloses a freezing device and a construction method for liquid nitrogen freezing water blocking construction in a tunnel. The freezing device comprises a freezing device main body, a driving mechanism and a guide rail. The guide rail is fixedly installed on the freezing device main body. The driving mechanism comprises a gear, the gear is engaged with the gear teeth arranged on the guide rail and forms a transmission pair. During construction, the freezing part is put into the tunnel to be constructed when the freezing device is in a folded state. Then, the freezing device is converted from the folded state to an unfolded state. Finally, liquid nitrogen is continuously poured into the left and right freezing pipes until the water in the tunnel to be constructed is frozen. Through the foldable double-fan structure, the guide rail-gear driving, the waterproof power system and the heat insulation design, the freezing range adaptability of the traditional freezing device is improved, the unfolding stability is improved, and the reliability in a humid environment is improved. The freezing device has the advantages of high construction efficiency, high reliability and strong adaptability.

This invention discloses a reactor and method for cultivating denitrifying granular sludge. The reactor includes a denitrification stirred tank and an aerobic aeration tank. Pre-granulated seed sludge is added to both the denitrification stirred tank and the aerobic aeration tank. The denitrification stirred tank is equipped with a stirring device and has an inlet on its top side. The bottom of the denitrification stirred tank is connected to the bottom of the aerobic aeration tank via a sludge-water circulation pipe. The bottom of the aerobic aeration tank is connected to a sludge discharge pipe, and the top side has an outlet. An aeration device is located at the bottom of the aerobic aeration tank and is connected to an air pump. An air-lift sludge device is located above the aeration device. The air-lift sludge device includes an air collection hood and an upflow pipe connected to the center of the top of the air collection hood. The top of the upflow pipe is connected to the top of the denitrification stirred tank via an upper sludge-water circulation pipe. The reactor and method for cultivating denitrifying granular sludge of this invention create suitable environmental conditions for the rapid cultivation of denitrifying AGS in a continuous flow process.

The utility model provides a valve positioner, and belongs to the technical field of explosion suppression of valve positioners. The valve positioner comprises a shell and a feedback shaft assembly, the feedback shaft assembly comprises a bearing mechanism, a first main shaft and a second main shaft, the first main shaft and the second main shaft can be kept static relatively, the first main shaft and the second main shaft are configured to be of independent forming structures respectively, the bearing mechanism is connected with the shell, and the second main shaft is connected to the bearing mechanism. The first main shaft is provided with a feedback part protruding out of the first main shaft in the radial direction, the feedback part is used for feeding back the position of the feedback shaft assembly, and the end, deviating from the first main shaft in the axial direction, of the second main shaft is connected with an actuator matched with the valve positioner so that the feedback part can feed back the position of the actuator. According to the valve positioner, the production cost of the valve positioner can be reduced, and the explosion-proof performance of the valve positioner can be improved.

The utility model relates to battery technical field discloses battery pack and electrical equipment, cooling device includes: transfusion subassembly, including liquid inlet pipe and liquid outlet pipe, a plurality of cooling components, cooling component includes heat exchange part and connecting seat, and the inside of heat exchange part has the cooling channel for the circulation of cooling liquid, and connecting seat has liquid inlet part and liquid outlet part, and at least one connecting seat still has input part, and at least another connecting seat still has output part, and liquid inlet part communicates with the liquid inlet of cooling channel, and liquid outlet part communicates with the liquid outlet of cooling channel, and liquid inlet part communicates with liquid inlet pipe through input part, and liquid outlet part communicates with liquid outlet pipe through output part, and electric core, the utility model will liquid inlet part, liquid outlet part, input part and output part be integrated to corresponding connecting seat respectively, and through single component can realize multiple connection functions simultaneously, and heat exchange part can be connected with adjacent heat exchange part or corresponding pipeline through a connecting seat, can reduce the quantity of connecting structure, and the structure is simplified also reduced the risk of liquid leakage.