154results about How to "With overload protection function" patented technology

The invention relates to an unmanned aerial vehicle type automatic sampling system at fixed points of the water surface. The unmanned aerial vehicle type automatic sampling system comprises a water sampler, a lifting mechanism and a control circuit, wherein the water sampler comprises a barrel body and a periphery component, a large conical horn mouth is designed at the lower end of the barrel body, and an end cover exhaust device is arranged at the upper end of the barrel body; a buoyancy ring and a heavy ring are arranged at the outer side of the barrel body, the buoyancy ring is arranged at the lower end of an end cover, and the heavy ring is arranged at the lower end of the buoyancy ring; and a valve cover is arranged at the bottom of the inner side of the barrel body; the integrity is connected by a flying ring, the lifting mechanism is connected at the upper part of the flying ring, and is controlled by the control circuit. The lifting mechanism adopts a winding and distributing mechanism, the winding mechanism is composed of a power motor, a worm-gear speed reducer and a speed ratio guide wire wheel set, the speed ratio guide wire wheel set is connected with the flying ring by a connecting wire, the speed ratio guide wire wheel set is connected with the worm-gear speed reducer which is connected with the power motor; while the twisting force is increased, self locking can be achieved; and the system adopts the unmanned aerial vehicle system to realize sampling, the traditional manual sampling mode can be replaced completely, and rapid, intelligent and high-efficiency water sampling can be achieved.

The invention discloses a six-drop individual section bottle-making machine and pressing and blowing production technology thereof, belongs to the field of bottle-making machines, in particular to a multi-drop bottle-making machine and bottle-making technology thereof. The bottle-making machine comprises a frame, a parison mold molding mechanism, a molding mold molding mechanism and a bottle poking mechanism, and is characterized in that: a molding device of the parison mold molding mechanism is an integral multi-cavity stamping device which comprises a driving cylinder, a combined cylinder, a punch, a piston push-pull plate and a piston, wherein the piston is connected with the piston push-pull plate; six punches are arranged at the upper end of the piston push-pull plate; mold switching devices of the parison mold molding mechanism and the molding mold molding mechanism adopt a parallel switching mode in a horizontal plane; the bottle poking mechanism is driven by two stepping motors; and the two stepping motors drive a rotating disc and bottle poking arms of the bottle poking mechanism through a synchronous belt. The technology comprises six steps of separating materials, producing parison, turning, molding, clamping bottles and poking the bottles. The bottle-making machine has the advantages of high bottle-making yield, good molding quality and capacity of manufacturing high-grade glass bottles in multiple specifications.

The invention relates to a conical-surface friction type overrunning clutch, belonging to mechanical transmission basic parts. A first intermediate ring and a second intermediate ring are respectively connected with an inner ring and an outer ring, which can rotate around a same axis, in a matching manner through a boosting transmission mechanism and a conical-face friction pair. The conical-surface friction type overrunning clutch is remarkably characterized in that both the boosting transmission mechanism and the conical-face friction pair work in a parameter range in which the boosting transmission mechanism and the conical-face friction pair cannot be locked independently by self, the boosting transmission mechanism is located in a normally-meshed state, and the conical-face friction pair applies initial pressure through an elastic pre-tightening assembly; and when tangential outer forces in different directions exist between the inner ring and the outer ring, the conical-face friction pair is made slide and rotate or keep a static state through the effect of the boosting transmission mechanism, so that the overrunning function and the self-locking function of the overrunning clutch are realized. According to the invention, by means of adjusting design parameters, the overload trackslip protection function of the overrunning clutch is realized conveniently.

The invention is concerned with permanent-magnet clutch equipment, relating to main axis and driven axis, connecting with main and driven turntables, main and driven springs, axis-joining wheel, operate perch and wheel, bearing frame, main and driven inside and outside magnetism blocks. When the main axis is moving, the main and driven inner and outside magnetism blocks work through gas-gap magnetism induction action, and the magnetizations direction to south and north poles of the main and driven inner and outside magnetism blocks is the radial, the amount is same even and the south and north poles are opposite located towards to the middle to produce the attracting and excluding shear around the movement direction of axes between the main and driven magnetism blocks that moves in synchronous according to shear. The radial suction face and excluding power face is same between the main and driven magnetism blocks to balance the attracting and excluding shear along the movement direction of axes. The main and driven magnetism blocks do not drive the revolving and driving force, so the revolving and driving force can joint and separate with each other between the main and driven axes.

A heavy-duty diesel engine split type rocker arm brake mechanism for a commercial vehicle comprises a rocker arm body, a swing mechanism and a hydraulic drive system; the rocker arm body is mounted on a rocker arm shaft through a main mounting hole, the swing mechanism comprises a swing head, a first adjusting bolt and a rolling column, the swing head is mounted on the rocker arm body, a sheet-shaped spring is arranged at the bottom of the swing head, and is pressed on the bottom of the rocker arm body, a ball head of the first adjusting bolt is mounted in a ball socket in an elephant foot shape, the hydraulic drive system comprises a hydraulic plunger with a return spring sleeved, a second adjusting bolt in contact with the hydraulic plunger and a rocker arm cam in threaded connection with the hydraulic plunger, the hydraulic plunger is mounted in a drive cavity of the rocker arm body, the rocker arm cam makes contact with the rolling column, a brake hydraulic oil way communicated with the main mounting hole, the drive cavity and a swing arm shaft hydraulic oil hole is arranged in the rocker arm body, and the heavy-duty diesel engine split type rocker arm brake mechanism is high in reliability, low in cost, high in lightweight degree, simple in structure, convenient to assemble and maintain and good in brake effect.

A shaft housing for a heavy vehicle equalizing suspension and a bus leaf spring suspension comprises metal core shafts, a spacer bush, a shell, baffle rings and two layers of elastic rubber bodies, wherein the spacer bush is positioned between the two layers of elastic rubber bodies; the metal core shafts, the spacer bush, the shell and the elastic rubber bodies are integrally vulcanized; and the elastic rubber body of the inner layer is longer than that of the outer layer in an axial direction so as to ensure that the stressed surfaces of the elastic rubber bodies of the two layers are equal and that stress applied to the elastic rubber bodies of the two layers is equal. The shaft housing is characterized in that: the shell, the spacer bush and the elastic rubber bodies are circumferentially disconnected, namely, nicks are reserved on the spacer bush and the elastic rubber bodies, and the nicks reserved on the shell, the spacer shell and the elastic rubber bodies are open C-shaped groove nicks; the baffle rings are arranged on the core shafts on the two sides of the axial direction of an elastic body formed by the spacer bush and the elastic rubber bodies; the inner circles of the baffle rings are tightly sleeved on the core shafts, while periphery is arranged in the shell; and a certain gap is reserved between each baffle ring and the shell.

The invention relates to an electric inner swing door mechanism system of a double-leaf swing door of a passenger car, comprising a car body, a left swing door, a right swing door, a transmission mechanism, a car door swing mechanism, an emergency door-opening mechanism and a coordinating mechanism; the mechanism system is characterized in that a novel physical design is carried out for the transmission mechanism, the emergency door-opening mechanism and the coordinating mechanism; the complicated caging mechanism of the car door in the prior art is omitted, thereby having simple structure; the coordinating mechanism designed by the invention is capable of realizing the open-close of the left swing door and the right swing door in a required order and the open-close in dislocation or staggering time, thereby enhancing the security of the open-close of the car door and humanization level.

A constant-pressure and -power control system for pressing abrasive disc downward to grind steel bellite is composed of a loading unit with a master motor for driving abrasive disc, a hydraulic unit for controlling the pressing down of abrasive disc and with a motor having the frequency-varying speed regulation, and a control unit for controlling the output power of master motor. The pressing-down force of abrasive disc is controlled by three-way proportional valve to release pressure.

The invention discloses a robot for cleaning attached marine organisms of a large tunnel. The cleaning robot comprises a vehicle body, a distance sensing device, a cleaning mechanical arm and cleaning devices, wherein the cleaning devices comprises the disc type cleaning device used for cleaning the top wall of the tunnel and the drum type cleaning device used for cleaning the side wall of the tunnel. The disc type cleaning device and the drum type cleaning device can be connected to a compatible connecting opening of the cleaning mechanical arm correspondingly and can be detached and replaced. The robot for cleaning the attached marine organisms of the large tunnel can sense the self-posture and ambient environment information in real time and can adaptively adjust the self-posture under the condition of high frequency and micro change; the contact force of the cleaning devices with the inner wall of the tunnel is controlled accurately, the overloading protecting function is achieved; and the cleaning devices is wide in adaptability, and safe, reliable, visual monitoring and efficient cleaning can be realized.

The present invention discloses a pruning machine. Its transmission mechanism is composed of input gear, output gear and eccentric block component. The described eccentric block component includes eccentric block, eccentric block case shell, brake block mounted in the eccentric block case shell and torsion spring. The eccentric block case shell is connected together with said eccentric block and formed into one body by means of brake block and torsion spring. Besides, said invention also provides the working principle of said pruning machine, and also provides its concrete operation method.

The invention relates to a vehicle-mounted constant-tension hydraulic capstan. The vehicle-mounted constant-tension hydraulic capstan comprises a stander, a rope storage roller, a rear roller and a front roller, wherein the right side on the rear part of the stander is provided with a reducer, a power input shaft of the reducer is connected with a power output shaft of a hydraulic motor in a transmission way, a power output shaft of the reducer is connected with the right end of a rear roller shaft in a transmission way, the axis of the rear roller shaft is arranged in the transverse horizontal direction, the rear roller is fixedly sleeved on the middle part of the rear roller shaft, a driving gear is sleeved on the left side of the rear roller shaft, the left end of the rear roller shaft is rotatably installed on the stander, the driving gear is engaged with a reversing gear, the reversing gear is fixedly sleeved on a reversing shaft, two ends of the reversing shaft are rotatably installed on the stander, the reversing gear is engaged with a driven gear, the driven gear is fixedly sleeved on the left side of a front roller shaft, and two ends of the front roller shaft are rotatably installed on the stander. The invention aims at providing the vehicle-mounted constant-tension hydraulic capstan with a compact structure, stable traction torque, reliable working performance and an overloading protection function.

The invention provides a magnetic rotation conversion straight-moving mechanism. A magnetic wheel consists of a cylindrical permanent magnet and a non-magnetic cylinder that are fixedly connected on a rotation shaft; the cylindrical permanent magnet is filled with the magnetism in the vertical direction; alternatively, the cylindrical permanent magnet is assembled by two semi-cylinders; the magnetic wheel can also consist of a plurality of tile-shaped permanent magnets, magnetic-conductive cylinders and non-magnetic cylinders that are fixedly arranged on the rotation shaft and are alternatively filled with the magnetism in the radial direction with polarity; wherein the tile-shaped permanent magnet can be also replaced by a whole permanent magnetic ring divided into areas in the circumferential direction and alternatively filled with the magnetism in the radial direction with polarity; the rotation shaft is arranged on a frame by a bearing; a permanent magnet filled with the magnetism in the vertical direction is arranged below the magnetic wheel; the bottom surface of the permanent magnet is fixed with a magnetic-conductive plate; the center of the bottom surface of the magnetic-conductive plate is fixedly connected with a connecting rod; and the other end of the connecting rod is connected with a linear movement part. The magnetic rotation conversion straight-moving mechanism has no dead points, no friction, thus having the advantages of high efficiency, lubrication-free, energy-saving and environment-protection, long service life and low cost.

The invention relates to a gear ring rotation limiting mechanism and belongs to the technical field of mechanical engineering. The gear ring rotation limiting mechanism comprises a driving gear, a rotary flange, a fixed flange, a middle idler wheel and a gear ring. The driving gear and the middle idler wheel are installed on the fixed flange which is fixed; the driving gear drives the gear ring to rotate via the middle idler wheel; the gear ring is installed in the rotary flange which is driven to rotate by the gear ring. The gear ring rotation limiting mechanism is scientific in design, convenient to use, safe and reliable and can be widely applied to rotation limiting devices with a driving shaft and a driven shaft installed coaxially.

The invention discloses a cable cleaning and winding device. The cable cleaning and winding device comprises a rack, a cable winding drum and a winding drum driving assembly used for driving the winding drum to rotate. The winding drum driving assembly is arranged at the rear end of the rack, the two ends of a rotating shaft of the winding drum are detachably connected with the winding drum driving assembly, and a linear unit is horizontally arranged at the front end of the rack. The linear unit is parallel to the axis of the winding drum, and a cleaning part is arranged on a sliding block ofthe linear unit, so that the cable cleaning device can move in a horizontal direction along with the linear unit sliding block when cleans the cable, and plays a role in guiding winding, integrates the cleaning and guiding functions, and a winding guiding mechanism does not need to be additionally arranged, so that the equipment redundancy degree is reduced, and the winding and cleaning efficiencyis improved. Meanwhile the cleaning part moves in the horizontal direction and applies the force in the horizontal direction to the cable, so that the cleaning effect is improved.

The invention discloses a converter and a converting device for reducing the effect of a zero-sequence current on a transformer. The converter comprises three primary windings and three secondary windings. The number of turns of winding of the primary windings is equal to the number of turns of winding of the secondary windings. The input ends of the three primary windings are connected with N-phase wires of the output side of a low-voltage distribution transformer, and the output ends of the primary windings are connected with the input ends of the secondary windings in a cross mode. The converting device comprises a first breaker, the converter, a second breaker, a protection control circuit, a surge protector, an open-phase safeguard, an air switch used for protecting the open-phase safeguard, a current transformer used for collecting current values of N-phase wires of the input end of a zero-sequence current converter, an ampere meter used for displaying current values collected by the current transformer, and a time relay. The proportion of the zero-sequence current flowing back to the distribution transformer is reduced, wherein the zero-sequence current is produced by an unbalance three-phase load in a low-voltage distribution network, the unbalance degree of the three-phase current can be effectively reduced, and the damage to the transformer from the zero-sequence current is reduced.

The invention discloses a shield cutter disk drive hydraulic system, which relates to a multi-pump-control multi-motor system and aims to provide a hydraulic control system which can realize stepless speed change and has the advantages of saving energy sources and flexibly reversing, along with high synchronicity, simple structure and the like. The shield cutter disk drive hydraulic system comprises at least two hydraulic pump stations, a plurality of bidirectional hydraulic motors and three-position four-way change valves which have the same quantity as the hydraulic pump stations, wherein the oil suction ports S of the hydraulic pump stations are communicated with an oil tank respectively; the oil inlets P1 of the three-position four-way change valves are communicated with the oil outlets A of the hydraulic pump stations respectively; the working oil ports A1 of the three-position four-way change valves are communicated with the working oil ports R of all the bidirectional hydraulic motors; the working oil ports B1 of the three-position four-way change valves are communicated with the working oil ports L of all the bidirectional hydraulic motors; the oil return ports T1 of the three-position four-way change valves are communicated with the oil tank; each hydraulic pump station comprises a pump station motor and a plunger type electrohydraulic proportion variable pump; and the plunger type electrohydraulic proportion variable pumps are constant-power variable pumps with pressure cutting-off functions.

The invention provides a magnetic straight-moving driving rotation mechanism. A magnetic wheel consists of a plurality of permanent magnetic plates and a nonmagnetic cylinder that are fixedly connected on a rotation shaft; the permanent magnetic plates are respectively filled with the magnetism in the radial direction; all permanent magnetic plates have consistent polarity sorting directions; the neutral surface of the permanent magnetic plate passes by the axis line of the rotation shaft; the rotation shaft is arranged on the frame by a bearing; a permanent magnet filled with the magnetism in the vertical direction is arranged below the magnetic wheel; the bottom surface of the permanent magnet is fixed with a magnetic-conductive plate; the center of the bottom surface of the magnetic-conductive plate is fixedly connected with a connecting rod; and the other end of the connecting rod is connected with a linear movement part. The magnetic straight-moving driving rotation mechanism has no dead points, no friction, thus having the advantages of high efficiency, lubrication-free, energy-saving and environment-protection, long service life and low cost.

The invention relates to a film disc coupler with an overload protection function. The film disc coupler can be applied to power transmission devices in aero-engines and marine engines. The film disccoupler comprises symmetrically-distributed connecting shafts (1), an integrated knuckle bearing (2), a flange plate (3), a switching section (5), a connecting bolt (6), an interval shaft (7), an adjusting mat (8), an inner shaft (9), a gland nut (10), a locking sheet (11), a protection outer cover (12), a bearing ring (13), a clamp set (14), a self-locking nut (15), an outer installing shaft (16), a connecting screw (17) and a locking sheet (18). On the basis that the common working condition of the film disc coupler is met, a bearing supporting structure is designed, a certain axial force load can be borne, a protection structure is designed for torque overload and deflection angle compensation overload conditions during work of the film disc coupler, the overload protection function isachieved, and the film disc overload damage can be effectively avoided.

The invention discloses a hydraulic driving device for a thickener. The hydraulic driving device for the thickener comprises a driving device formed by a power source, a speed reducer and an output shaft, wherein the power source is connected with the speed reducer. The hydraulic driving device for the thickener is further provided with a hydraulic lifting device formed by a hydraulic oil cylinder and a guiding shaft, the hydraulic oil cylinder and the guiding shaft are connected through a piston rod, the hydraulic oil cylinder is arranged above a connecting plate, and the guiding shaft is arranged below the connecting plate. An advanced and reliable electrohydraulic combined control system is adopted, pressure of a hydraulic system serves as control signals, the hydraulic driving device for the thickener can automatically lift a rake according to the resistance which a rake arm is subjected to, signal detection is comprehensive and accurate, motions are safe and reliable, and rake pressing is avoided.

The invention discloses a method for testing feeding quantity of bellows of combined harvester, a device and a feeding quantity sensor. The bellows (composed of a diaphragm and a sensor base) is internally collocated with an electric turbulent flow sensor or weighting transducer to form a bellows feeding quantity sensor. The bellows feeding quantity sensor is installed on the base at the gap bridge outlet of combined harvester to form a bellows feeding quantity testing device for bearing the extrusion pressure of gap bridge conveying and crop feeding. The extrusion pressure (diaphragm displacement amount and diaphragm displacement force) signals are converted to electric signals and are transmitted to a feeding quantity observing and controlling instrument for testing the feeding quantity of combined harvester and facilitating the production efficiency control of combined harvester. The bellows feeding quantity sensor of the invention has the advantages of simple installation, convenient use, high sensitivity, accurate test, rain resistance, humidity resistance and strong practicability.

The invention relates to a multi-functional liquid filling system, and is suitable for places where liquid materials need to be accurately filled. The multi-functional liquid filling system comprises a liquid pipeline system and a computer control system. The multi-functional liquid filling system is characterized in that the liquid pipeline system comprises a liquid storing tank, a standby liquid storing tank, a storing tank of a liquid transporting vehicle, a pump body, a filling device, a filling measurement pipeline, a liquid supplement measurement pipeline and a liquid drainage measurement pipeline. The multi-functional liquid filling system disclosed by the invention integrates a function of accurately filling of liquid, a function of self liquid supplement measurement of the liquid storing tank, and a function of self liquid drainage measurement of the liquid transporting vehicle.

The invention relates to a preparing and molding method for concrete in-situ direct shear test specimens, which comprises the following steps: a. on-site lofting, arranging specimens on the testing site according to technical requirements, marking the sizes of the specimens, and fixing the location of a cutting line according to technical parameters; b. concrete cutting, carrying out nondestructive cutting on concrete according to the cutting line ensured by lofting; and c. periphery concrete rejecting, rejecting the periphery concrete on the periphery of the specimens by utilizing small-sized machines and tools to prepare the concrete in-situ direct shear test specimens. The invention overcomes the defects of the traditional manual method and greatly enhances the preparation quality of the concrete in-situ direct shear test specimens. The prepared specimens have smooth and flat surfaces and can be directly tested to ensure the reality and the accuracy of test results, increase the efficiency of specimen preparation and reduce construction cost.

The invention discloses a full automatic chain saw type pipe pile cutting machine which comprises a base. A hydraulic working station is arranged at the rear end of the base and communicated with a hydraulic control system through a pipeline, a circuit control system is connected with one side of the hydraulic control system in a controlling mode, the hydraulic control system is connected with a feeding hydraulic cylinder through a pipeline, the end of a piston rod of the feeding hydraulic cylinder is fixedly connected with a hydraulic motor support. The full automatic chain saw type pipe pile cutting machine is easy to use, fast in adjusting and installing and easy to operate and learn and can conduct cutting operation by installing a pulley yoke and a chain and connecting a power supply and a driving system.

The invention relates to a multi-path-output low-voltage-difference over-current protector comprising an input interface, an auxiliary power supply, a fault resetting and reporting circuit, a fault reporting interface, a differential current sampling circuit, an electronic switch, an error amplifier, a differential voltage comparator, and an output interface and the like. According to the invention, a P channel power MOS tube is used as an electronic switch; a low-voltage-difference shunt is used for carrying out sampling of a small current signal and then a differential amplifier is used foramplifying the small current signal; and the amplified signal and a current reference are sent to the error amplifier to carry out error amplification to control the opening degree of the power MOS tube. A constant-current state is realized under the condition of being larger than a rated current reference; and complete opening is carried out under the condition of being lower than the rated current reference. The differential voltage comparator is used for comparison between the voltage difference of the power MOS tube and the voltage reference to determine whether a fault exits.

The invention discloses a feeding device applicable to a folder, comprising a bracket, wherein a rotating shaft is fixed at the upper part of the bracket, one end of the rotating shaft is provided with a rotating shaft belt wheel; one side of the bracket is provided with a driving device, an output end of the driving device is provided with a driving belt wheel and in transmission connection with the rotating shaft belt wheel through a belt. According to the belt wheel disclosed by the invention, the load impact can be eased; the operation is stable, noise and vibration are low; the transmission structure of the belt wheel is simple and convenient to adjust; specific to the manufacturing and the installing precisions of the belt wheel, the belt wheel transmission is not as strict as a meshing transmission; the belt wheel transmission has the function of overload protection; the adjusting scale of a center distance between two shafts of the belt wheel transmission is relatively large.

The invention provides a turning cover type washing device and a driving assembly thereof. The washing device comprises a main body and a cover body, and the cover body is rotatably arranged on the main body. The driving assembly comprises a motor, a speed reducing mechanism and a clutch mechanism which are connected in sequence; the speed reducing mechanism is connected with the motor to reduce the output speed and increase the torque, and the speed reducing mechanism at least comprises a primary planet gear train; the clutch mechanism is connected between the cover body and the speed reducing mechanism for overload protection. The clutch mechanism comprises a tolerance ring and a follower, and the tolerance ring is clamped along the radial direction between the follower and a driving part of the speed reducing mechanism for outputting power. The washing device can automatically turn the cover body of the washing device to open or close. The driving assembly comprises the speed reducing mechanism and the clutch mechanism so as to stably and effectively drive the cover body, and the driving assembly also comprises the function of overload protection that the cover body and the motor are prevented from damaging.

The invention discloses a thin film extraction tank transmission device which comprises an extraction tank, wherein an upper row of roll shaft and a lower row of roll shaft are arranged in the extraction tank in a staggered manner; each row of roll shaft is driven to rotate through a motor and reducer, a T-shaped reverser and magnetic drivers; the magnetic drivers are an inner magnetic driver and an outer magnetic driver; the outer magnetic driver is mounted on the T-shaped reverser; the T-shaped reverser is in transmission connection with the motor and reducer; the inner magnetic driver is mounted on the output end of the row of roll shaft; and a spacer sleeve is arranged between the inner magnetic driver and the outer magnetic driver, and is fixed on the tank body of the extraction tank. As the magnetic drivers are adopted for transmitting power, and the upper row of roll shaft and the lower row of roll shaft are both driving rolls and rotate synchronously, microscopic deformation in diaphragm pore-forming is avoided during a conveying process, and the performance of a diaphragm is guaranteed; and as the magnetic drivers are adopted, the sealing effect is good, and phenomena such as evaporating, emitting, dripping and leaking of an extracting agent can be avoided during the normal production process.

The invention discloses an electric hydraulic setting device. The electric hydraulic setting device comprises a downhole electric hydraulic setting tool and a ground control box. The electric hydraulic setting tool comprises a vibration reduction electronic short joint, a hydraulic balance short joint, a hydraulic power short joint and an execution short joint. The vibration reduction electronic short joint and the hydraulic balance short joint are connected through a screw ring, the other end of the hydraulic balance short joint is connected with the hydraulic power short joint through a screw ring, and the other end of the hydraulic power short joint is connected with the execution short joint through a screw ring. The hydraulic balance short joint provides hydraulic oil, and hydraulic energy is converted into setting force through the hydraulic power short joint. A piston rod, a setting connecting shaft, a clamp key and a sliding sleeve short joint are arranged in the execution short joint. The end of the piston rod is connected with the setting connecting shaft. The setting connecting shaft is connected with the interior of a bridge plug by arranging a rod so as to generate setting action. According to the electric hydraulic setting device, an electronic short joint of a conventional instrument and the vibration reduction short joint are combined to the instrument, anti-vibration performance is improved, the length of the instrument is reduced, by means of modular split sealing design, the maintenance process is simplified, and the reliability of the instrument is improved.