971 results about "Conical surface" patented technology

The present application relates to a kind of rocket engine injector thin-wall milling self-positioning fixture and assembly method, it mainly includes upper positioning tire body component, conical surface expansion ring, tire unloading bottom plate, pressing cover plate, tire unloading lifting ring, pressing bolt, expansion screw, lower positioning bottom plate component, locking bolt, long fixed bolt, lower positioning bottom plate component is fixed in machine tool workbench by locking bolt long-term, always not disassembled.Product is positioned and clamped and supported by conical surface expansion ring, tire unloading bottom plate, pressing cover plate, pressing bolt, expansion screw before milling injector thin-wall and positioning tire body component, limit the radial and axial movement of injector thin-wall;Injector thin-wall is positioned and clamped and supported by conical surface expansion ring, tire unloading bottom plate, pressing cover plate, pressing bolt, expansion screw before milling injector thin-wall and positioning tire body component, limit the radial and axial movement of injector thin-wall;Injector thin-wall is positioned and clamped and supported by conical surface expansion ring, tire unloading bottom plate, pressing cover plate, pressing bolt, expansion sleeve before milling injector thin-wall and positioning tire body component, limit the radial and axial movement of injector thinn

The invention relates to the technical field of hydraulic valves, and discloses an integrated safety hydraulic control one-way valve integrated with a tail beam telescopic cylinder, which comprises a valve body, a through main channel arranged in the valve body and a valve core assembly arranged in the main channel, the valve core assembly comprises a joint valve sleeve, a valve core spring, a valve core, a valve seat, a liquid inlet valve sleeve, an ejector rod spring and an ejector rod, the valve seat is arranged between the connector valve sleeve and the liquid inlet valve sleeve, the valve element is arranged in an inner cavity of the connector valve sleeve in a sliding mode, and the ejector rod is arranged on the axis extension line of the valve element. The valve element is of a primary-secondary valve structure and comprises a main valve element and a pilot valve element coaxially arranged in the main valve element, an axial guide inner cavity is formed in the center of the interior of the main valve element and comprises a damping cavity and a conical surface plugging cavity, and a pilot valve channel is formed in the wall of the damping cavity. The problem that a valve element of a traditional hydraulic control one-way valve rapidly moves at the hydraulic control opening moment to generate severe mechanical impact is solved, and the service life of a valve set is prolonged.

The invention discloses an anti-loose structure nut and a using method thereof, and the anti-loose structure nut is composed of an upper nut and a lower nut; one end of the upper nut is of a conical surface structure, and the inclined angle of the conical surface structure relative to the central axis of the upper nut is 16 degrees; a groove is formed in the conical surface structure; the upper portion of the lower nut is an inner taper hole, the lower portion of the lower nut is a straight hole, and the included angle between inclined generatrixes on the two sides of the inner wall of the inner taper hole is 16 degrees. The diameter of the inner taper hole is smaller than that of the conical surface structure. The using method comprises the following steps that (1) the lower nut is screwed into the bolt penetrating into the interlayer; and (2) screwing the upper nut into the inner taper hole of the lower nut by adopting a hexagonal wrench. The device is simple in structure and easy to process and manufacture; common carbon steel or stainless steel materials are adopted, so that the manufacturing cost is low; the locking torque is large and stable, and the anti-loosening performance is excellent; during installation, the locking torque can be adjusted according to actual requirements; and the locking torque is stable and reliable, and can be repeatedly disassembled and used.

The utility model relates to the technical field of pneumatic heatproof ground test equipment for aerospace crafts, in particular to a conical spray pipe which comprises an inner shell, a transition shell layer and an outer shell, the transition shell layer is sleeved on the outer side of the inner shell, and the outer shell is sleeved on the outer side of the transition shell layer. The inner shell is divided into three sections in the axial direction, and a plurality of reinforcing ribs are evenly arranged on the outer side conical surfaces of the first section, the second section and the third section at intervals in the circumferential direction. The number of the reinforcing ribs at the second section is smaller than that of the reinforcing ribs at the first section and the third section, and a cooling liquid channel is formed between every two adjacent reinforcing ribs in the circumferential direction. According to the conical spray pipe, the reinforcing ribs are arranged in the axial direction of the spray pipe in a segmented mode, the number of the reinforcing ribs in the circumferential direction of the throat is smaller than that of the reinforcing ribs arranged on the contraction section and the expansion section, and the reinforcing ribs serve as structural reinforcing structures of the inner shell and serve as wall bodies of the cooling channels at the same time, so that passing of cooling liquid at the throat is guaranteed; the cooling effect at the throat is improved, and sufficient strength of the inner wall of the spray pipe is ensured.

The utility model relates to the technical field of medical instruments, and particularly discloses a water jet pressurizing device which comprises a pump body, a liquid inlet connector, a liquid outlet connector, a first one-way pre-tightening valve and a second one-way pre-tightening valve. The pump body is provided with a piston cavity, one end of the pump body is provided with a first cavity and a second cavity, a liquid inlet channel is communicated between the first cavity and the piston cavity, and a liquid outlet channel is communicated between the second cavity and the piston cavity; one end of the liquid inlet connector is installed in the first cavity, and a first conical surface is arranged on the inner wall of the end, close to the liquid inlet channel, of the liquid inlet connector. The first one-way pre-tightening valve is arranged between the first conical surface and the pump body; one end of the liquid outlet connector is installed in the second cavity, and a second conical surface is arranged at the end, close to the liquid outlet connector, of the liquid outlet channel. And the second one-way pre-tightening valve piece is arranged between the second conical surface and the liquid outlet connector. According to the secondary emptying device, secondary emptying of the pump body can be effectively achieved, the emptying efficiency is high, and the operation risk and the operation cost are reduced.

The utility model relates to a composite photovoltaic inhaul cable, which comprises a composite anti-corrosion cable body, two ends of the composite anti-corrosion cable body are respectively wrapped in a variable cross-section extrusion sleeve of an inner cavity structure, one end of the variable cross-section extrusion sleeve is open, and the opening is sealed by an arc-shaped gland. The variable cross-section extrusion sleeve is divided into a guide arc-shaped conical surface, a first extrusion surface, an excessive pressure relief section, a second extrusion surface and a non-extrusion surface which are sequentially arranged backwards from an opening, the composite anti-corrosion cable body comprises a zinc-aluminum alloy steel strand or an epoxy coating steel strand, and the surface of the steel strand is wrapped with an extrusion bond-wrapping type polyurea layer. Due to the design of a brand-new anchoring mode and the improvement of anti-corrosion measures, the corrosion resistance of the inhaul cable is achieved, and the inhaul cable has the advantages of being high in stress fatigue resistance, good in shock resistance, reliable in anchoring performance, compact in anchorage device structure, convenient to manufacture, install and replace and the like.

The invention relates to the technical field of submerged pumps, and discloses a magnetic drive submerged pump which comprises a pump shell, an impeller is installed in the pump shell and driven by a motor in a magnetic coupling mode, a filter flow cylinder is installed at the bottom of the pump shell, the bottom of the filter flow cylinder is of a closed structure, the filter flow cylinder and the impeller are coaxially arranged, and the filter flow cylinder and the pump shell are rotationally assembled. The impeller drives the filter flow cylinder to rotate synchronously when rotating, the device forms a basic guiding mechanism of'centrifugal force guiding and side water inlet anti-blocking 'depending on the special conical structure of the filter flow cylinder, the filter flow cylinder adopts the design that the bottom is closed and the side part is provided with a water inlet channel, and when the filter flow cylinder rotates along with the transmission main shaft, centrifugal force can directly act on a side water inlet area; and meanwhile, due to the conical shrinkage structural form, fluid in the cylinder naturally forms the upward flowing trend along the conical surface, and the problem that a dead water area is easily formed at the bottom of a traditional flat-bottom filter cylinder, and impurity vortex accumulation is caused is thoroughly solved.

The invention relates to a single-person installation tool for a conical surface product microstrip antenna, and solves the problems of low efficiency and insufficient reliability of the existing tool and method. The tool comprises a tool main body block, the tool main body block is provided with a positioning pin, one side of the tool main body block is fixedly connected with an elastic bridle, the two sides of the elastic bridle are respectively provided with a non-elastic bridle fixedly connected to the tool main body block, and a buckle matched with the elastic bridle and a ratchet tensioner matched with the non-elastic bridle are fixedly connected to the other side of the tool main body block. A wave-absorbing sponge is fixed on the surface of the tool main body block, and the tool main body block is provided with a signal line interface which is respectively connected with the microstrip antenna and the signal simulator. The front end and the rear end of the tool are fixed through the inelastic bridle and the ratchet tensioner, the consistency of installation of the test tool every time is improved, the stability of installation is improved, interference of human factors is reduced, the possibility of electromagnetic leakage is reduced, and the testing accuracy of the radio altimeter is improved.

This invention provides a gun-shaped intraoperative instrument cleaning device, comprising a housing, a cover on the housing, a cleaning port on the cover, a drive motor fixedly mounted inside the housing, a mounting base mounted on the output shaft of the drive motor, a mounting plate slidably mounted on one end of the mounting base, an elastic element between the mounting base and the mounting plate, a cleaning cylinder rotatably mounted on the mounting plate, the cleaning cylinder being eccentrically arranged with the cleaning port, the middle section of the cleaning cylinder having an inverted conical surface, an annular brush disposed inside the cleaning cylinder, a spray gun facing the inverted conical surface mounted on the cover, and a drive mechanism connected to the cleaning cylinder disposed inside the housing. This device, under the action of the elastic element, allows the annular brush to exert different pressures on the instruments, thereby autonomously controlling the brushing force and effectively preventing damage to the ends of instruments made of fragile materials due to uncontrollable brushing force during cleaning, thus improving the practical value of the cleaning device.

The invention relates to a U-shaped metal sealing butterfly valve and a using method thereof.The U-shaped metal sealing butterfly valve comprises a valve body and a valve plate, the valve plate is located on the inner side of the valve body, the top of the valve body is fixedly connected with a worm gear assembly, a driving rod is installed on the front side of the worm gear assembly, the outer side of the driving rod is sleeved with a round pipe and a rocking wheel, and the inner side of the rocking wheel is fixedly connected with a limiting block; an annular pipe and a U-shaped metal sealing ring are fixedly connected to an inner cavity of the valve body, a plurality of water outlets are formed in the inner side of the annular pipe, a water conveying pipe is fixedly inserted into the front side of the valve body, a block valve matched with the water conveying pipe is arranged on the water conveying pipe, and a valve handle of the block valve is movably sleeved with a movable frame. The top of the movable frame is rotationally connected with a rotating shaft. The valve plate has the beneficial effects that residual impurity particles on the conical surface can be better removed, so that the conical surface is tightly attached to the U-shaped metal sealing ring, and the sealing performance of the valve plate is guaranteed.

The invention provides a blueberry substrate cultivation pH value detection device, and relates to the technical field of pH value detection devices. A leakage control part is arranged above the detection part; a material soaking part is arranged above the leakage control part; an external control part is arranged above the material soaking part; the inner plug block is matched with the conical surface of a conical groove in the top of the communicating leak hole, contact type sealing is achieved, an outer adjusting ring and an inner adjusting frame are of an integrated connecting structure, an operator can drive the inner adjusting frame and a top cover frame to synchronously move upwards only by shifting the outer adjusting ring upwards, the communicating leak hole is communicated, sample water is conveniently conveyed and treated, the detection process is simplified, and the detection efficiency is improved. The blueberry substrate cultivation pH value detection device has the advantages that the blueberry substrate cultivation pH value can be conveniently detected, and the problem that due to the fact that sampling, proportioning, mixing, detection and other processes need to be operated and treated in various containers, the number of tools needed in the detection process is large, the steps are tedious, and detection treatment is inconvenient is solved.

An accommodating cavity is formed in a central guide column, a through hole is formed in the side wall of the central guide column, and a locking pin is arranged in the through hole; the gear adjusting sleeve is arranged outside the center guide column in a sleeving mode. The side wall, close to the center guide column, of the gear adjusting sleeve is provided with multiple sets of gear grooves. The side wall, away from the center guide column, of the gear adjusting sleeve is a conical surface, and an inclined groove is formed in the conical surface in the generatrix direction. The magnetic steel is distributed in the circumferential direction of the gear adjusting sleeve. One end of the transmission slider is in sliding fit with the chute, the other end of the transmission slider is connected with the magnetic steel, and the gear adjusting sleeve drives the transmission slider and the magnetic steel to radially move through axial movement to adjust the radius of the disk; the moving block is arranged in the containing cavity, an unlocking groove is formed in the moving block, and the moving block pushes the locking pin to be clamped into the gear groove by moving to the locking position in the axial direction. And at the unlocking position, the gear adjusting sleeve pushes the locking pin to be clamped into the unlocking groove through axial movement. Multi-gear quick locking and unlocking are achieved through cooperation of the locking pin, the gear groove and the unlocking groove.

This utility model discloses a high-voltage resistant electrical insulator connection device, including an outer sleeve, an inner liner sleeved inside the outer sleeve, several mounting brackets connected to the inner wall of the inner liner, a busbar passing through the mounting brackets and laid inside the inner liner, a first ring plate installed at one end of the inner liner for driving the inner liner to rotate along its axis inside the outer sleeve, an outer conical surface opened at the end of the inner liner away from the first ring plate, and a positioning component adapted to the outer conical surface. This utility model, by providing an outer sleeve and an inner liner, allows the busbar installed inside the inner liner to freely adjust its angle as the inner liner rotates, and the positioning component can achieve friction locking of the inner liner. This enables the busbar to adapt to environmental requirements when connecting the electrical insulator to external equipment, facilitating installation by workers and greatly improving the installation efficiency of the electrical insulator.

The utility model discloses a hole depth measuring device capable of adapting to various hole diameters, and belongs to the technical field of mechanical cold machining. Comprising a cylindrical body and a cylindrical body arranged on the cylindrical body in a sliding and sleeving mode. A graduated scale is arranged on the outer circumferential face of the cylindrical body in the axial direction of the cylindrical body, a first conical face is arranged at the left end of the cylindrical body, a second conical face is arranged at the left end of the cylindrical body, and a third conical face is arranged at the right end of the cylindrical body. A boss is arranged at the right end of the cylindrical body, and the diameter of the boss is larger than that of the cylindrical body. And the inclination of the conical surface II is greater than that of the conical surface III. The hole depth measuring tool can be suitable for measuring hole depths of various hole diameters, the measuring efficiency is high, one-time measurement needs about 30 seconds, the measuring accuracy is high, the measuring error is smaller than 0.1 mm, the measuring accuracy is not affected by skills of users, and the problem that an existing measuring tool is large in measuring error is solved.

The invention relates to a collet chuck and a collet chuck assembly with an axially displaceable, sleeve-like collet head 1 on which clamping elements with inclined surfaces 4, inclined radially inwards to the longitudinal axis 5 of the collet head 1, are arranged. These inclined surfaces bear against a conical surface 8 of a drawbolt 7, which is inclined accordingly to the longitudinal axis 5. When the collet head 1 and drawbolt 7 move relative to each other, the clamping elements slide along the conical surface 8 against a spring force, expanding radially outwards from a relaxed position in the region of the smaller diameter of the conical surface 8 to a clamped position in the region of the larger diameter of the conical surface 8. The clamping elements are several clamping jaws 3 distributed around the circumference of the collet head 1, each of which is guided radially displaceably in radial guide openings 2 in the collet head 1 against the radially inward spring force of one or more spring elements.

The invention discloses a coarse powder pre-separation device which comprises a vertical barrel, a feeding pipe and an air inlet pipe, the upper end of the barrel is closed, the air inlet pipe is a bent pipe with the constant diameter, one end of the air inlet pipe is communicated with the lower end of the barrel, a coarse powder collecting hopper is installed at the low point position of the air inlet pipe in a communicated mode, and the position of the coarse powder collecting hopper deviates from the air inlet side of the air inlet pipe. The feeding end of the feeding pipe is located outside the barrel, the discharging end of the feeding pipe extends into the barrel, a pipe opening of the feeding pipe is in a vertical state, the pipe opening of the discharging end, extending into the barrel, of the feeding pipe is provided with a distribution plate, the distribution plate is a cone with an upward cone top, and the distribution plate and the pipe opening of the discharging end, extending into the barrel, of the feeding pipe are coaxial. A gap is formed between the conical surface of the distribution plate and the horizontal plane of the discharge end pipe orifice. The cylindrical flow can naturally form an umbrella-shaped material curtain, the umbrella-shaped material curtain is scattered in all directions, the material curtain can be very thin, the operation is stable and reliable, and the difficulty is avoided when the equipment is large.

This utility model relates to the field of pilot-operated relay valves, specifically a pilot-operated relay valve for a control system. The utility model includes a valve body with a first through-hole. A sealing cap is provided at one end of the first through-hole. A first inlet and a second inlet are connected to one side of the first through-hole, and an outlet is connected to the side of the first through-hole away from the first inlet. A control chamber is provided at the end of the first through-hole away from the sealing cap. A piston plate is slidably connected to the control chamber, and a valve core is fixedly connected to the piston plate, extending into the first through-hole. A first locking block is provided within the first through-hole, and a second elastic element is fixedly connected to the sealing cap. A steel ball is provided on the second elastic element, and a second through-hole is provided on the first locking block. A second locking block is provided within the first through-hole, and a third through-hole is provided on the first locking block. A first conical surface is provided within the third through-hole, and a second conical surface is provided on the middle section of the valve core. The technical solution of this utility model can improve the problem of damage to Y-type gaskets after long-term use.

The utility model discloses a quick-release threaded pipe, belongs to the technical field of pipeline structures, and provides a threaded pipe which can be directly and quickly disassembled and assembled without using tools, and comprises a splicing pipe and a push-pull handle, the main body part of the splicing pipe is a main pipe body, the middle part of the main pipe body is provided with an outer convex conical ring, and the end part of the main pipe body is provided with a connecting end; external threads are arranged on the outer side face of the connecting end, the two push-pull handles are fixedly connected through the connecting piece, the outer convex conical ring is located between the two push-pull handles and provided with a pair of symmetrical circular truncated cones, the axes of the two circular truncated cones are collinear with the axis of the main pipe body, each push-pull handle comprises a force application disc, and the inner wall of each force application disc is provided with an inner concave conical surface. The push-pull handle structure for rotation constraint is designed in the middle of the splicing pipe with the threaded structures at the two ends, and when the threaded pipe is disassembled and assembled, component force in the tangential direction of the spiral line is provided, so that operation can be achieved without using a wrench tool, the disassembly and assembly operation is simplified, and the disassembly and assembly efficiency is improved.

The utility model provides a kind of nozzle (10) for cavitation surface treatment, the nozzle (10) for cavitation surface treatment has nozzle head (13), the nozzle head (13) has: first plane (13a), it sprays liquid, and with jet axis (1) vertical;Second plane (13b), it is vertical with jet axis (1), is the opposite side of first plane (13a);Nozzle hole (21), the nozzle hole (21) has: semicylindrical discharge groove (23), it is configured in first plane (13a), extends in the first direction with jet axis (1) vertical;Ejection hole (25), it extends along jet axis (1), and is connected with discharge groove (23), and for the straight elliptical cylinder with long diameter in the first direction extending ellipse-shaped section;Import portion (27), it has straight conical surface (27a) with jet axis (1) as central axis, and is connected to ejection hole (25).

The utility model relates to a saliva suction tube which comprises a tube body, the tube body comprises a fixed straight flow section, a saliva suction front end and a bent folding section, and the two ends of the bent folding section are connected with the fixed straight flow section and the saliva suction front end respectively. The saliva suction front end is of a conical structure, a plurality of suction holes are formed in the conical surface of the saliva suction front end, and the suction holes are uniformly distributed in the saliva suction front end; a filter screen is arranged in the bent folding section, a tongue protector is arranged on the fixed straight flow section, and the tongue protector is detachably installed on the fixed straight flow section. Compared with the prior art, the device has the advantages of simple structure, flexibility in operation and the like.

The application belongs to the technical field of electromagnetic materials, and provides a design method and system of a conical surface tunable frequency selective surface with stable performance. According to the performance evolution law of the FSS under the conical surface conformal transformation, the FSS period shape and arrangement mode are determined. Whether the geometric parameter value of the optimized conical surface tunable frequency selective surface structure meets the set target IL value is judged. If the geometric parameter value of the optimized conical surface tunable frequency selective surface structure does not meet the set target IL value, the geometric parameter value of the conical surface tunable frequency selective surface structure is redesigned according to the insertion loss improvement strategy. The proposed curved surface TFSS design process has low IL, high conformality and wide angle domain stability.

This utility model discloses an incense burner with a cylindrical tube. The bottom of the cylindrical tube has a threaded base plate, and the top has a threaded incense insert. Several ventilation holes are arranged around the cylindrical tube. The incense insert has a through-hole, pressable incense tube that passes through a cavity inside the incense insert. The incense tube has a ring of several incense beads that press against the conical surface at the top of the cavity. A fixed handle is located at the top of the incense tube, and a hanging ring is located at the top of the handle. There are three incense beads that can slide through the wall of the incense tube. The advantages of this utility model are: the incense is lit at the bottom and inserted into the cylindrical tube; the ventilation holes allow for air circulation and fragrance dispersal; the ash falls into the cylindrical tube; and the ash can be poured out by opening the threaded base plate. When used indoors, the ash is automatically collected to prevent scattering; when used outdoors, the cylindrical tube covers the incense to prevent it from being blown out by the wind.

The utility model relates to the technical field of oil well liquid drainage, in particular to a negative pressure liquid drainage device. Comprising an upper connector, a sealing conical surface is formed in the upper connector, the lower end of the upper connector is fixedly and hermetically connected with an outer cylinder, the lower end of the outer cylinder is fixedly and hermetically connected with a lower connector, a piston blind plate is arranged in the lower connector, connected with the lower connector through a shear pin and in sealed contact with the upper connector, and a screen pipe is fixedly and hermetically connected in the lower end of the piston blind plate. The lower end of the screen pipe extends to the position below the lower connector and is blocked. The screen pipe and the piston blind plate are automatically released through fracture of the shear pin, external power or manual intervention is not needed, instant communication of a shaft and an oil pipe column is achieved, and the liquid drainage starting time is remarkably shortened.

This utility model relates to the field of sensor technology, and more particularly to a transmission cable, comprising a cable, a cable conduit, a first connector, an inner joint, a sealing ring, and a union nut. The cable conduit surrounds the cable. The first connector is connected to one end of the cable. The inner joint is connected to one end of the cable conduit and is located outside the first connector. A first conical surface is formed on the outer peripheral surface of the inner joint, and a sealing ring groove is formed on the first conical surface. The sealing ring is disposed in the sealing ring groove and partially extends out of the sealing ring groove. The union nut is disposed outside the inner joint for threaded connection with a sensor. A connection structure between a sensor and a transmission cable is also provided. Compared with the prior art, the transmission cable and the connection structure between the sensor and the transmission cable of this utility model are simple to assemble and disassemble, reducing assembly and disassembly time, and also have good sealing performance.

The utility model relates to the technical field of rotational molding box raw material mixing, and discloses a rotational molding box raw material mixing device which comprises a mixing bin and an upper cover, the bottom wall of the mixing bin is a conical surface, the upper cover is arranged at an opening in the upper portion of the mixing bin, and a rapid mixing assembly is arranged on the upper cover. The rapid mixing assembly is used for evenly mixing raw materials used before production of the rotational molding box, by reversely starting the motor, an output shaft of the motor can drive the spiral blade to reversely rotate through a series of mechanisms, and when the spiral blade rotates, acting force close to a discharging valve is applied to plastic powder in the mixing bin; the plastic powder can be effectively discharged from the mixing bin, and the problem that in a traditional mode, after being mixed, the plastic powder is fine in particles, has certain viscosity, can be attached into the mixing bin and is not prone to being completely leaked out, so that discharging of the mixed plastic powder is not smooth, and follow-up machining of a rotational molding box is affected is solved.

The high-precision hydraulic rock drill rapping rod limiting structure comprises a hydraulic cylinder body and a hydraulic cylinder rear end cover connected to the tail end of the hydraulic cylinder body, a rapping rod is arranged at the axis position in the hydraulic cylinder body, the tail end of the rapping rod is a conical surface, and the inner side of the hydraulic cylinder rear end cover is connected with a main limiting seat; a guide hole is formed in the axis position of the main limiting seat, an annular oil storage cavity is formed in the bottom in the main limiting seat, the aperture of the guide hole is matched with the outer diameter of the tail end of the rapping rod, a conical damping cavity matched with the tail of the rapping rod is formed in the bottom of the guide hole, and a miniature radial damping hole is formed in the top of a cone of the conical damping cavity. And the miniature radial damping holes are communicated with the annular oil storage cavity. According to the design, the conical buffer head is matched with the conical damping cavity, so that gradually-increased hydraulic damping force is formed, and stable speed reduction is achieved. The limiting shoulder is used for making contact with and compressing the disc spring set, nonlinear and high-rigidity buffering force is provided, stable output of impact energy is guaranteed, and noise and harmful vibration are remarkably reduced.

This invention discloses an electric support rod. The bottom boss of the support rod nut undergoes axial elastic deformation due to the conical surface of the countersunk hole in the screw end cap, reducing the threaded clearance between the support rod nut and the screw. This reduces the radial force acting on the screw, thus creating a clamping braking force on the screw from the bottom boss of the support rod nut. The bottom boss, screw, screw end cap, and screw end cap retaining ring constitute the braking device. This invention provides reliable locking friction while allowing the screw to rotate flexibly and better control lifting and lowering with a relatively large threaded pair clearance, improving the locking performance of the threaded pair and resulting in a compact structure.

This invention provides a pressure testing device for vanadium redox flow batteries, relating to the field of flow energy storage testing equipment. It employs a push-pull sleeve and a threaded gas delivery pipe, with a compression ring and an expansion sleeve installed between the ends of the sleeve and the pipe. Rotating the push-pull sleeve causes it to move axially along the gas delivery pipe, driving a retaining ring to push the compression ring towards the expansion sleeve. The conical surface of the compression ring penetrates the expansion sleeve, applying radial pressure to cause it to expand outwards and tightly adhere to the inner wall of the tested pipe, forming a sealed structure. This eliminates the need for complex connections such as threads or plugs, achieving rapid sealing through mechanical deformation. A quick-connect fitting connects to a gas source, a control valve regulates the pressure, and a pressure gauge monitors the pressure inside the pipe, enabling sealing tests. Sectional testing can be performed without fully installing the pipeline system, avoiding the need for segmented troubleshooting after a leak and shortening testing time.

The invention provides an auxiliary device for replacing a carrier roller of a belt conveyor, relates to the technical field of belt conveyors, and aims to solve the problem that an existing auxiliary device is inconvenient for operators to operate when a belt is jacked up. Comprising a jacking module, the jacking module comprises a fixing base, a first mandrel, a second mandrel and a jacking assembly, the fixing base is provided with an adjusting screw hole with the axis extending in the horizontal direction and a containing cavity communicating with the adjusting screw hole, and the containing cavity is provided with a lateral opening and a top opening; the first mandrel comprises a threaded section and a transmission section, the threaded section is spirally connected to the adjusting screw hole, and the transmission section is located in the containing cavity; the second core shaft comprises a connecting section and a driving section, a circumferential limiting structure is arranged between the connecting section and the transmission section, and the driving section is rotationally installed on the fixing base and exposed out of the lateral opening; the jacking assembly is installed at the top opening in a vertically sliding mode, the transmission section and the driving section are each provided with a conical surface part, and the jacking assembly is provided with an inclined surface part in sliding fit with the conical surface parts. The method is convenient to operate.

The utility model discloses a motor rotor shaft turning clamp that can be self-adaptive and tightly hold and flexibly position, relates to the field of machining, and is composed of Morse taper, external thread connecting shaft, spring collet, threaded sleeve and adjusting sleeve and other components for connecting with the main shaft of machine tool. The sliding cavity of the front end of the external thread connecting shaft is provided with a sliding sleeve and a telescopic spring, and the sliding sleeve is fixedly connected with the spring collet. The sleeve sleeve of the front end of the threaded sleeve is sleeved outside the spring collet, and the inner wall of the front end is provided with a conical surface that is matched with the conical head of the spring collet. The adjusting sleeve is connected with the threaded sleeve through threads, and can drive the limiting sleeve to push the spring collet to move. During use, rotating the adjusting sleeve makes the spring collet move backward, and the spring collet is tightened under the action of the conical surface, the rotor shaft is self-adaptively and tightly held, and the telescopic spring realizes flexible positioning and compensates for the axial and angular deviation. The clamp can automatically adapt to the rotor shaft with a diameter tolerance within a certain range, has high self-centering precision, is suitable for high-precision turning machining of conventional rotor shafts, and has simple structure and convenient maintenance.