337 results about "Mechanical design" patented technology

The invention discloses a precision clamp device for machining special-shaped workpieces in mechanical design, and relates to the technical field of mechanical manufacturing, the precision clamp device comprises a base main body, a reference bottom plate, a plurality of rotating shafts and corresponding elastic clamping blocks, the reference bottom plate is arranged on the base main body, and positioning slots are formed for the rotating shafts to be rotatably mounted; the rotating shafts can independently rotate and drive the elastic clamping blocks to deflect to adapt to the irregular surface of the special-shaped workpiece, the rotating shafts comprise rotating blocks matched with the inserting grooves and adjusting sliding grooves extending along the shaft length, and the rotating shafts are evenly distributed on the circumference of the reference bottom plate; an elastic clamping block is connected with a transmission screw and an adjusting nut, a linear sliding block is arranged to be matched with an adjusting sliding groove, a self-adaptive contact is arranged on the side, facing the clamping center, of the elastic clamping block, the contact is provided with an elastic protection contact end cover, and a stress sensing connecting rod and an elastic buffering spring are installed in the contact. A movable rod penetrates through the base body, one end of the movable rod is connected with a control handle, the other end of the movable rod is connected with a self-adaptive pressing plate, the movable rod is sleeved with a reset spring, the pressing plate is provided with a profiling abutting block, and the clamping stability is improved.

A bathroom lock structure is provided, which includes an outdoor handle and an indoor handle. The indoor handle is provided with a knob with a spiral groove, a deblocking button in the indoor handle can be slid to cause a column on the deblocking button to be clamped in the spiral groove, a safety rod located in a first square hole within in the knob is driven to rotate. A locking cam in a shielding cover on the outdoor handle is driven to rotate by a rotation of the safety rod, thereby achieving locking or unlocking function. This bathroom lock structure achieves reliable locking and unlocking functions through exquisite mechanical design, thereby improving flexibility and convenience of use. The state of the lock can be observed through a display hole on the outdoor handle, allowing a user to clearly understand a current state of the lock.

The utility model discloses an accessory, relates to the technical field of AVG forklifts, and aims to solve the problems that in the prior art, related clamping accessories or other machines are adopted by the AVG forklifts, the design is complex, a vehicle body is greatly influenced, the structural weight of the whole vehicle and the structure of the accessories are influenced, and meanwhile application scenes are easily limited. The AVG forklift body comprises a main support, two plug pins are fixedly connected to one side of the main support, first electromagnets are arranged on the upper surfaces of the two plug pins, second electromagnets are arranged at the ends, close to the main support, of the plug pins, and the first electromagnets and the second electromagnets are installed in a submerged mode; the AVG forklift body comprises a driving main machine, a traveling system used for traveling, a hydraulic system used for lifting and an electric power system used for supplying power are arranged in the driving main machine, a radar range finder is arranged below the driving main machine, and an anti-collision head is arranged at one end of each pin.

The invention provides a hydraulic closed-loop tilling depth control system based on multi-sensor fusion in order to solve the problems that traditional tilling depth control is low in precision, poor in stability and the like. The system collects data through an inclination angle sensor, a displacement sensor, a posture sensor and the like, and after fusion processing, a hydraulic cylinder drives a parallel four-bar mechanism to adjust the tilling depth of the subsoiler. The system has three innovations: firstly, a dynamic model is constructed by using multi-source sensor cooperation and sliding mode variable structure control, the anti-interference capability is improved by combining a control strategy, and accurate tilling depth control is dynamically realized according to soil conditions; 2, a parallel four-bar mechanism is mechanically designed to be combined with hydraulic drive, terrain interference is eliminated by utilizing mechanism characteristics, and the control precision and unbalance loading resistance are enhanced; and thirdly, a bidirectional hydraulic lock and a manual-electric dual-mode oil way are adopted for hydraulic pressure, so that reliable tilling depth control and continuous operation are guaranteed. The three innovations are fused, and a high-precision, strong-stability and ultra-reliable tilling depth control solution is provided for saline-alkali soil agriculture.

The invention relates to the field of ship deck mechanical design, and discloses a lightweight design method of an anchor and mooring equipment winding drum device, which comprises the following steps: S1, establishing a finite element model: establishing an initial three-dimensional model of the anchor and mooring equipment winding drum device, and carrying out regional division on the initial three-dimensional model to obtain a design domain and a non-design domain, applying a preset load condition and a boundary condition to the initial three-dimensional model so as to establish a finite element model; and S2, generating a conceptual configuration: based on the finite element model, carrying out topological optimization in the design domain to generate a material space distribution scheme representing an optimal force transmission path, and the scheme is the conceptual configuration. According to the method, the innovative structural configuration representing the optimal force transmission path is generated through the topological optimization technology, and the limitation of a traditional design method on structural innovation and optimization efficiency is systematically solved in combination with a parameterized multi-objective optimization process.

The invention relates to a negative pressure quantitative adjustment and fine adjustment system for vacuum sizing of a drip tape production line, and belongs to the field of mechano-electronics. By adopting a mode of combining a mechanical design technology, a microelectronic technology, a communication technology, a pneumatic technology and the like, quantitative adjustment and fine adjustment of the vacuum degree in the vacuum sizing box are realized through independent work or matched and combined work of the air inlet nozzles with different calibers; and the combination mode of the air inlet nozzles stored in the EEPROM storage chip is called according to the production requirements of different pipe diameters and wall thicknesses, so that the production efficiency is effectively improved, and the purposes of accurately determining the diameter and the pipe wall thickness of the drip irrigation belt production line are achieved. The whole system has the advantages of high precision, low cost, convenience in use, high efficiency and the like, and has a wide market prospect.

The invention belongs to the technical field of mechanical design, and particularly relates to a method and device for optimizing structural parameters of a sliding shoe bearing oil cavity of a mill. The method comprises the steps that firstly, the influence degree of each to-be-optimized oil cavity structure parameter of the mill sliding shoe bearing on the oil film bearing characteristic is analyzed, and all the oil cavity structure parameters are divided into two types according to the influence degree, namely driving change parameters and driven change parameters; then establishing a regression model between the oil film bearing characteristic parameters and the active change parameters and a regression model between the driven change parameters and the active change parameters; and finally, solving to obtain optimal oil cavity structure parameters by combining all the established regression models with the goal that the oil film bearing characteristic parameters meet the requirements. The regression model established by the invention can reflect the mutual influence relationship among the oil cavity structure parameters, and the influence relationship is considered to optimize the oil cavity structure parameters, so that the optimization performance of the oil cavity structure parameters is improved.

The invention discloses a cylindrical material conveying device based on a horizontal linear motor, and belongs to the field of mechanical design and manufacture, the device comprises a magnetic flux switching linear motor, a stator supporting device, a material supporting device, a material pushing device and a sensor device, and the magnetic flux switching linear motor is a driving source and is of a horizontal bilateral structure; the reinforcing ribs in the stator supporting structure adopt a dual-function coupling design, so that the cost can be reduced and the efficiency can be improved; the material supporting device is fixedly connected with the stator supporting structure and is in linear contact with the cylindrical material; the pushing device is fixedly connected with the linear motor rotor and is connected with the stator supporting structure through a linear guide rail sliding block; the sensor device is located on one side of the linear motor, and a signal line is of a spring coil structure. The rotor is simple in structure, easy to maintain, good in natural heat dissipation effect, compact in overall structure and high in space utilization rate, and the problems that an existing same-type cylindrical material conveying device is complex in rotor structure, poor in natural heat dissipation effect and low in overall structure space utilization rate are solved.

The invention belongs to the field of mechanical design, and relates to a rotary blowout preventer for a coal mine drilling machine. The core structure comprises a transition four-way joint which is provided with a deflation valve and a water drain valve which are respectively used for discharging gas and drilling slag and water; the rotary sealing device comprises a shell, a front end cover, a rear end cover, a rotary inner sleeve and a sealing rubber sleeve, the sealing rubber sleeve is in an inverted cone shape, self-sealing is achieved through the pressure of media returning out of a hole, and the holding force on the drill rod is enhanced. In addition, the device is further provided with an axial limiting structure, various sealing pieces, a nylon supporting ring, a lubricating nipple and other auxiliary components. In some embodiments, an auxiliary sealing ring is additionally arranged on the inner side of the large end of the sealing rubber sleeve, and double-sealing guarantee is formed. The device can effectively solve the problems that an existing coal mine drilling gas leakage-proof device is rapid in sealing abrasion, poor in high-pressure sealing performance and the like, and safe production of a coal mine is guaranteed.

A mobility impaired rehabilitation wheelchair having both a manual mode of operation and a motorized mode of operation for use by a wheelchair occupant in providing efficient and reliable leg exercising for improving circulation and providing muscular stimulation. The mobility impaired rehabilitation wheelchair has an electrical motor and shaft movement that is compact in nature for enabling the motorized mode of operation and the mechanical design provides the wheelchair occupant with a leaver to control movement and the ability to disconnect motion in the manual mode of operation.

The invention discloses a fabric detection device, and belongs to the technical field of fabric performance detection.The fabric detection device comprises a supporting seat, a detection control cabinet is fixedly connected to the side face of the supporting seat, a supporting guide mechanism is fixedly connected to the supporting seat, and two guide blocks are slidably connected into the supporting guide mechanism; and an upper rubbing plate is fixedly connected below the guide block on the upper side. According to the cloth rubbing device, the upper rubbing plate, the lower rubbing plate, the contact plate, the clamping plate and the first elastic assembly are adopted, when the upper rubbing plate and the lower rubbing plate are far away from the middle plate, cloth is automatically clamped and limited, and when the distance between the upper rubbing plate and the middle plate and the distance between the lower rubbing plate and the middle plate are minimum, clamping and limiting are automatically relieved, so that rubbing treatment of the cloth is more sufficient and comprehensive; the fabric detection device provided by the invention not only improves the comprehensiveness and accuracy of the detection of the crease resistance of the fabric, but also remarkably improves the detection efficiency and reliability through the innovative mechanical design and the automatic operation process of the fabric detection device.

The utility model relates to the field of mechanical design, and discloses a gravel crushing device with a protective structure, which comprises a base, the inner wall of the base is fixedly connected with a connecting shell, the outer walls of the front side and the rear side of the left end of the connecting shell are fixedly connected with fixed discs, and the opposite ends of the two fixed discs are fixedly connected with a fixed rod together; the outer wall of the bottom end of the fixing rod is rotationally connected to the left side of the top end of the connecting shell, the outer wall of the fixing rod is rotationally connected with a protection semicircular shell, the protection semicircular shell and the connecting shell are connected through a clamping assembly, and a motor is installed on the outer wall of the rear end of the connecting shell. And the driving end of the motor penetrates through the connecting shell and is fixedly connected with a rotating rod. According to the utility model, the protection structure can be closed or opened as required through the clamping assembly, so that an operator can be effectively prevented from accidentally contacting with a rotating part of the crusher during sandstone crushing operation, and the risk of accidents is greatly reduced.

The utility model relates to the technical field of mechanical design, and discloses a cross-shaped sliding table structure workbench for fixing rough machining drilling of a petroleum fracturing valve box, which comprises a supporting platform, a positioning baffle plate is arranged at the top of the supporting platform, a fixing clamp is arranged on the side surface of the positioning baffle plate, and a scrap collecting device is arranged on the front side of the positioning baffle plate. According to the workbench of the cross-shaped sliding table structure for rough machining and drilling of the fixed petroleum fracturing valve box, the supporting platform can flexibly move in the horizontal direction through the cross-shaped sliding table structure below the supporting platform, and an operator can conveniently and rapidly adjust the relative position of the petroleum fracturing valve box and a drill bit of a drilling machine; the fixing device and the positioning baffle can be flexibly adjusted according to the shape and the size of the petroleum fracturing valve box. Compared with a traditional workbench with a fixed layout, when petroleum fracturing valve boxes of different specifications are machined, accurate positioning and clamping can be achieved, machining errors caused by the adaptation problem are avoided, the machining quality is guaranteed, and the machining efficiency is improved.

The invention discloses an aerostatic bearing rotation error modeling method based on bidirectional fluid-solid coupling, belongs to the technical field of ultra-precision mechanical design and performance simulation, and aims to solve the problems of insufficient model applicability and low calculation efficiency in the existing aerostatic spindle analysis technology. The method comprises the following steps: establishing a five-degree-of-freedom mechanical model of the gas static pressure main shaft; constructing a thrust gas film initial model and a neck gas film initial model containing comprehensive manufacturing errors, and recording unbalanced torque; calculating the total unbalanced torque of the system, carrying out iterative circulation until the total torque, the axial force and the radial force of the system reach convergence conditions, traversing all angle positions of the main shaft rotating 360 degrees for a circle, integrating main shaft balance attitude coordinates obtained by calculation under all angles, generating a mass center trajectory diagram and an axis space inclination trajectory diagram of the main shaft, and calculating the balance attitude of the main shaft. And an accurate rotation error model is obtained.

The invention discloses a robot feeding and clamping device, and relates to the technical field of mechanical design and manufacturing, the robot feeding and clamping device comprises a mechanical arm, one end of the mechanical arm is fixedly connected with a fixed outer frame, and the surface of the fixed outer frame is slidably connected with a pressing frame for clamping an object; a power circular plate for adjusting the clamping state of materials is arranged in the fixed outer frame, a fourth spring for preventing the clamped materials from being separated is arranged in the pressing frame, a dough pressing block for conducting secondary clamping on the materials so as to improve the conveying stability of the materials is arranged in the pressing frame, and an extending block at one end of a seventh groove synchronously slides along with the pressing block. The pressing block is arranged in the pressure groove and drives the sealing block to slide in the pressure groove, the sealing block makes contact with the inclined face of the pressure groove, the sealing block is pushed by the inclined face of the pressure groove to slide towards the material along the lower surface of the pressing block, then a baffle is formed below the material, and the purpose of preventing the clamped material from falling off is achieved.

The utility model relates to mechanical design manufacturing technical field discloses a kind of film stretching machine for film production, including operation platform, the inside fixed connection of operation platform has electric push rod one, the drive end fixed connection of electric push rod one has connecting block, the right side fixed connection of connecting block has one rack, the inside wall sliding connection of operation platform has another rack, the inside rotation connection of operation platform has gear, the rack is meshed connection with the gear, the far side of two rack is fixedly connected with connecting plate, and the inside installation of two stretching rollers has outer support component. In the utility model, the key parameter of real-time adjustment stretching ratio, tension distribution is completed, and the production demand of different material and thickness specification film is adapted, and avoid the problem of insufficient stretching or overstretching due to fixed parameter.

The utility model discloses an anti-winding steel wire winding wheel disc, and belongs to the technical field of mechanical design and manufacturing. The steel wire winding wheel disc comprises a supporting frame, a winding wheel disc body rotationally installed on the supporting frame, a control box, a limiting block and a guide mechanism, wherein the control box and the limiting block are arranged above the supporting frame, and the guide mechanism is arranged in the control box and the limiting block and used for guiding a steel wire. The guide mechanism comprises a threaded rod rotationally mounted between the control box and the limiting block, a limiting rod fixedly mounted between the control box and the limiting block, and a control groove formed in the threaded rod; through cooperative use of the devices and arrangement of the guide mechanism, the multiple guide pieces can reciprocate in the direction of the winding wheel disc body at the same time when the winding wheel disc body winds the steel wires, so that the situation that the steel wires are mutually wound is reduced, use in the future is facilitated, and meanwhile the probability that the steel wires are damaged is reduced.

The application discloses a kind of collaborative design method and device of gear transmission system for marine environment, it is related to mechanical design field, comprising: the depth that gear transmission system works in marine environment is obtained, based on depth and first relationship, the environmental parameter of marine is calculated;According to environmental parameter and second relationship, the state parameter of lubricating oil used in gear transmission system is calculated;According to the state parameter of lubricating oil and the environmental parameter of marine, select initial gear material in material performance parameter database;According to the design requirement of gear transmission system, select initial configuration in configuration database;Initial gear material and initial configuration are used as initial condition, gear material and configuration are input to coupling performance prediction model to obtain performance index, under constraint condition, target function is solved iteratively using multi-objective optimization algorithm, to obtain the best gear material and configuration.The application overcomes the limitation of traditional separation type design, and can capture complex coupling relationship.

The utility model discloses an airfoil locking structure which is arranged on an aircraft. The structure comprises a power mechanism and a fixing mechanism, wherein the power mechanism is arranged between the folding wing and the fuselage and is used for driving the folding wing to unfold; the fixing mechanism comprises an in-place block, a mounting block, a limiting pin, a first compression spring, a limiting plate, a contact rod and a second compression spring, a vertical first mounting hole is formed in one side of the bottom of the mounting block and matched with a machine body limiting hole, and the limiting pin is movably mounted in the hole and connected through the first compression spring; a mounting groove and a second mounting hole which are communicated are transversely formed in the other side of the mounting block, the limiting plate belt moves in the mounting groove through the hole, a plate body of the limiting plate belt can block the limiting pin, the limiting pin is released through the hole, and the contact rod is movably connected in the second mounting hole, fixedly connected with the limiting plate and connected through the second compression spring. According to the structure, the high-reliability unfolding and locking process is achieved through pure mechanical design, it is ensured that the folding wing is stably fixed under the aerodynamic load, and the overall structure is reasonable, small in size and light.

The utility model relates to mechanical design and manufacture, and discloses a torsion self-adaptive lifting mechanism with an anti-drop lock ring, which comprises a fixed seat, the top of the fixed seat is fixedly connected with a limiting shell, the inner wall of the limiting shell is rotatably connected with a rotating block, the top of the rotating block is fixedly connected with a fixed column, and the fixed column is fixedly connected with a locking ring. A threaded column is fixedly connected to the top of the fixing column, two fixing blocks are fixedly connected to the outer wall of the threaded column, buckles are rotatably connected to the outer walls of the two fixing blocks, a connecting shell is connected to the outer wall of the threaded column in a threaded mode, a connecting column is fixedly connected to the top of the connecting shell, and a buckle ring is rotatably connected to the inner wall of the connecting column. According to the utility model, by rotating the threaded column, the threaded column can drive the fixed column and the rotating block to rotate on the inner wall of the limiting shell, and meanwhile, the inner wall of the threaded column can be in threaded connection with the connecting shell, so that the connection of the structure is more stable and firmer.

The invention belongs to the technical field of mechanical design, and discloses a self-adaptive supporting clamp and method for chatter suppression and deformation monitoring in turning of a large rotary thin-walled workpiece. The self-adaptive supporting clamp comprises a base, a clamping unit, a positioning unit, an auxiliary supporting unit, a deformation monitoring unit, a vibration monitoring unit, a feedback unit and a control system. The self-adaptive supporting clamp is a supporting system which is more suitable for flutter suppression and deformation control in vertical turning of rotary workpieces in the machining positioning and layout mode. The inner supporting clamp for vertical turning of the outer surface of the rotary thin-wall part has the efficient vibration reduction characteristic, the good fitting degree and the large supporting adjusting range, and the supporting requirements of workpieces with different diameters and heights can be met. Through the deformation monitoring unit, the vibration monitoring unit and the feedback unit, the supporting state is self-adaptively adjusted in real time according to the deformation and chatter conditions in the machining process, the deformation and chatter phenomena in the machining process are reduced or avoided, the machining precision is guaranteed, and the rejection rate is reduced.

The invention relates to the field of ball valve control equipment, in particular to a PDS high-frequency ball valve structure based on three-valve-rod cooperative bearing and two-stage sealing, which comprises a main valve body, an auxiliary valve body, a ball body, a valve seat and an upper valve rod, the ball body is sleeved with a lower valve rod, the PDS high-frequency ball valve structure further comprises an outer valve rod, the upper valve rod is sleeved with the outer valve rod, and a step structure is arranged at the bottom of the outer valve rod. The outer valve rod is connected with a contact shaft sleeve on the inner wall of the ball body in a matched mode. The upper valve rod, the outer valve rod and the lower valve rod convert medium thrust into component force and bear the component force cooperatively. A separation structure for cooperative bearing of the three valve rods is arranged, medium thrust is efficiently converted into axial component force through the conical surface step structure mechanical design, in other words, the axial supporting structure of the outer valve rod and the pure torque transmission structure of the upper valve rod are separately stressed, and the outer valve rod and the lower valve rod form a pure axial bearing system. The upper valve rod purely transmits torque, the outer valve rod and the lower valve rod cooperatively bear axial force, are connected with the contact shaft sleeve in a matched mode and bear medium static pressure, the torque of the upper valve rod is reduced, the configuration specification of an actuator is reduced, and cost is reduced.

The application discloses a ceramic-dot array metal core-aluminum alloy honeycomb composite protection structure based on a multi-scale mechanical design principle, and relates to the technical field of new energy automobile power battery safety protection. The composite protection structure comprises, in sequence from a front surface to a battery pack direction, a ceramic panel layer, a dot array metal core layer and a metal honeycomb buffer layer; and the ceramic panel layer, the dot array metal core layer and the metal honeycomb buffer layer are connected into an integral assembly through an integrated connection process. The sandwich type composite protection structure composed of the ceramic panel layer, the dot array metal core layer and the metal honeycomb buffer layer is constructed, so that the safety risk of the battery pack caused by the bottom impact is fundamentally reduced while the mass is significantly reduced, and the active passivation of the columnar obstacle impact, the high-efficiency energy absorption and the residual impact isolation are realized.

The utility model relates to the technical field of mechanical transmission structure design and automatic mechanical design, and discloses a gear structure. The first gear is arranged on an output shaft of the speed reducer in a sleeving manner; the second gear is meshed with the first gear; the grooved wheel box is rotationally connected with a rotating shaft, and the second gear is arranged on the rotating shaft in a sleeving mode; and the mounting seat is fixedly connected to the bottom of the grooved wheel box, a rotating space is arranged in the mounting seat, and an output shaft of the speed reducer is contained in the rotating space and rotationally connected to the mounting seat. According to the gear structure, the fixed installation base is arranged at the bottom of the grooved wheel box, the problem that the first gear and the second gear are not prone to being matched is solved, transmission precision and stability are improved, deformation of the output shaft of the speed reducer is reduced, the service life of the speed reducer is prolonged, vibration abrasion and noise are reduced, and assembling and maintaining are convenient.

The utility model discloses an inflator pump with a pressure relief protection structure. The inflator pump comprises a pump body, an upper cover, a buckling groove, a safety buckle and the pressure relief protection structure. The upper cover and the pump body form a sealed inflation chamber, and an inflation nozzle is arranged at the bottom; a buckling groove and a safety buckle enhance the connection strength of the upper cover and the pump body and prevent the upper cover from popping up due to overlarge air pressure; the pressure relief protection structure is composed of a pressure relief opening, a pressure relief nut, a pressure relief noise reduction sponge, a pressure relief spring and a pressure relief sealing plug, and safe pressure relief under abnormal air pressure is achieved through mechanical design. The method can effectively avoid the overhigh air pressure risk caused by the failure of ECU control logic, remarkably improves the safety and reliability of equipment, and is suitable for a massage air bag and other scenes needing to be inflated for a long time.

The utility model relates to the technical field of mechanical design and manufacture, and discloses an efficient energy-saving washing device for spinning, which comprises a box body structure, a conveying mechanism is assembled in the box body structure along the length direction, and a cleaning mechanism and a shifting mechanism are respectively arranged on two sides of the conveying mechanism. The cleaning mechanism comprises a double-sided scrubbing brush, a sliding base, convex blocks, a lead screw, a bearing seat, a rolling bearing, a rotating motor, a sliding rail, sliding grooves, a convex plate and a concave groove, the double-sided scrubbing brush is fixedly connected to the sliding base, the sliding base is in threaded connection to the lead screw, the convex blocks are fixedly connected to the two sides of the sliding base, the sliding grooves are formed in the two sides of the inner wall of the sliding rail, and the convex plate is arranged in the concave groove. According to the textile fabric cleaning device, due to the fact that the cleaning mechanism is arranged, the upper face and the lower face of a textile fabric can be cleaned at the same time, all-directional cleaning of the textile fabric can be achieved in the single cleaning process, and the textile fabric cleaning device has the advantages of being simple in structure, convenient to use and high in practicability. The cleaning effect is obviously enhanced, the working efficiency is improved, and the cleaning time is shortened.

The utility model relates to the technical field of mechanical design, in particular to a valve core of an electromagnetic pilot operated valve, which comprises a valve core main body, two groups of buffer layers are fixed at the upper end of the valve core main body, the diameter length of the upper group of buffer layers is larger than that of the lower group of buffer layers, lantern rings are fixed at the upper ends of the two groups of buffer layers, and the lantern rings are fixed at the lower ends of the two groups of buffer layers. And a limiting disc is fixed at the upper end of the buffer layer. The buffer layers and the lantern rings are used in cooperation, when equipment is used, the two sets of buffer layers and lantern rings are connected with the valve body, through the buffer layers and the lantern rings of different layers and sizes, high-pressure fluid firstly rushes into the positions of the small set of buffer layers and lantern rings, preliminary throttling and pressure reduction are generated, and the high-pressure fluid continuously moves upwards along with the valve element; when the fluid enters the buffer layer and the lantern ring which are wider and deeper, the pressure is further released step by step, so that the high-speed fluid is prevented from directly washing the surface of equipment, and the service life of the equipment is prolonged.

The invention discloses a stirring device with a locking function, and relates to the technical field of mechanical design and manufacturing, the stirring device with the locking function comprises a base, a stirring mechanism arranged in a stirring tank and used for stirring food, and a clamping mechanism arranged in a top cover and used for controlling the connection state of the top cover and the stirring tank, a releasing mechanism for releasing the clamping state of the top cover and the stirring tank is arranged in the top cover, a detection mechanism is arranged in the top cover, a noodle pressing block abuts against a clamping groove in a center rotating rod to achieve buckling sound, and the clamping feeling not only improves the stability of connection between the top cover and the stirring tank, but also improves the stability of the stirring tank. The prompt sound also prompts a worker that the connection between the top cover and the stirring tank is in a non-loose and non-tight state at the moment, and then the top cover stops rotating, so that the problem that the top cover is broken open due to internal pressure during operation due to too loose screwing by a user, or the top cover is difficult to disassemble due to too tight screwing by the user is avoided.

The projectile motion law demonstration teaching aid comprises a base, a sliding rod, a locking mechanism, a manual trigger, a first small ball and a second small ball, the sliding rod can be installed above the base in a front-back moving mode, a first magnetic block and a push block are fixed to the bottom of the sliding rod and arranged below the base respectively, and the first magnetic block and the push block are connected with the locking mechanism. A check block and a second magnetic block are fixed to the bottom of the base, the first magnetic block is used for magnetically attracting the first small ball, the second magnetic block is used for magnetically attracting the second small ball, the check block is used for making contact with the front end of the magnetically-attracted first small ball for limiting, the push block is used for making contact with the rear end of the magnetically-attracted second small ball for limiting, and the locking mechanism is used for locking the sliding rod to the base. And the manual trigger is used for unlocking the sliding rod by the locking mechanism and driving the sliding rod. The teaching aid adopts pure mechanical design, is simple and ingenious in structure, does not need a power supply, is green and environment-friendly, is excellent in operability, practicability, heuristic and interestingness, is low in manufacturing cost, is convenient to carry, and can be flexibly applied to various indoor and outdoor demonstration scenes.

The invention belongs to the technical field of engineering quality detection, and discloses a low-disturbance combined ground breaking drilling tool for engineering quality detection, which comprises a connector connected with a power end, the connector is connected with a sampling mechanism, the sampling mechanism is connected with a ground breaking mechanism, and in the engineering quality detection, low-disturbance sampling is the key to guarantee the accuracy of detection data; in engineering quality detection, low-disturbance sampling is the key of accuracy of detection data; an existing drilling tool depends on redundant assemblies, is complex in structure, high in machining and maintenance cost and large in assembly error, stress is concentrated during rotation, large-amplitude swing is prone to occurring, hole walls and soil samples are squeezed and rubbed, and the original structure of the drilling tool is damaged. According to the drilling tool, modular pure mechanical design is adopted, the structure is simplified, and cost is reduced; spiral ribs and a soil unloading groove prevent soil from being gathered and extruded, and disturbance is reduced; an air eliminating hole balances pressure, and a hinged baffle and a baffle ring are automatically closed to keep a soil sample complete; the magnetic connector and the convenient soil sampling structure improve efficiency, low-disturbance sampling is achieved in the whole process, and it is ensured that detection data are reliable.