19results about How to "Guaranteed preload" patented technology

The invention provides an adjustable rotating hinge water seal device and an adjusting method, the adjustable rotating hinge water seal device comprises a water seal seat, a rotating hinge body is arranged on the water seal seat, and the rotating hinge body is rotatably connected with the water seal seat through a hinge shaft; a spring pre-tightening mechanism is arranged between the top end of the rotating hinge body and the water seal base and used for providing pre-tightening force for the rotating hinge body. A water seal rubber and a water seal pressing plate are arranged between the other end of the rotating hinge body and the gate panel, and the water seal pressing plate, the water seal rubber and the rotating hinge body are fixed through bolts and nuts. The adjustable rotating hinge water seal device is installed on a lintel of a gate groove of an arc-shaped gate and makes contact with a gate panel to form a sealing body, the reliable water sealing effect is achieved, the water jetting phenomenon in the gate opening and closing operation process is avoided, a vibration source enabling the gate to vibrate is reduced, the operation environment of equipment is improved, and the service life of the equipment is prolonged. And the reliability and the safety of equipment operation are improved.

The invention discloses a station conversion driving mechanism for water ice content detection of a lunar soil water molecule analyzer. The station conversion driving mechanism comprises a worm assembly, a worm gear, a worm gear case, a first flat key, a rotating shaft, a first bearing pressing ring, a first bearing, a worm gear fixing ring, a screw, a second flat key, a second bearing, an encoder, a second bearing pressing ring and an encoder seat. Worm gear and worm meshing transmission is utilized, the rotating shaft is driven to rotate by means of the supporting effect of the first bearing and the second bearing, and driving force is provided for station conversion of a sample support assembly with a hole shaft matched on the transmission shaft by means of radial limiting of the first flat key on the transmission shaft. The mechanism is compact in structure, light in weight, wide in use temperature range and large in output torque, and can be used as a driving mechanism for multi-sample support station conversion of the lunar soil water molecule analyzer.

The invention discloses a root locking mechanism applied to a spatial extension arm, which is used for locking a supporting disc and a sleeve of the spatial extension arm, the supporting disc is perpendicular to the axial direction of the sleeve, and the root locking mechanism is characterized by comprising a locking mechanism unit, an anti-overturning mechanism assembly and a structural locking groove in the inner wall of the sleeve, wherein the four anti-overturning mechanism assemblies are installed on the four locking mechanism units in a one-to-one correspondence mode, one ends of the four anti-overturning mechanism assemblies make contact with the inner wall of the sleeve, and a supporting effect is provided for the root locking mechanism; the bottom ends of the four locking mechanism units and the four corners of the supporting disc are installed in a one-to-one correspondence mode. Four structure locking grooves are evenly distributed in the inner wall of the sleeve and matched with the upper ends of the four locking mechanism units for locking. The locking device has the advantages of being compact in structure, stable and reliable in the working process, high in locking rigidity, convenient to unlock, capable of being repeatedly used and the like.

The invention relates to the technical field of bolt fastening, in particular to a bolt fastening tool and method.The bolt fastening tool comprises a framework unit, a bolt unit horizontally moving along the framework unit, a nut unit, an alignment unit and a tensioning unit; the alignment unit is arranged between the bolt unit and the nut unit. The tool has the beneficial effects that firstly, the tool can flexibly linearly move and circumferentially rotate through the cooperation of the three-petal-shaped overall structure and the opening and closing function of the hydraulic cylinder, and the tool can adapt to different working environments and position requirements; secondly, the locking piece ensures the stability of the bolt in the connecting process, and the connecting precision and reliability are improved; and finally, through cooperative work of the tensioner and the claw mechanism, the pre-tightening force of the bolt is ensured, correct fixing of the flange is also ensured, and therefore the efficiency and safety of the whole fastening process are improved.

The invention discloses an electric three-way valve which comprises a driving device and a valve body, the driving device comprises a stepping motor and a reduction gearbox, the reduction gearbox is provided with an output planet carrier, a ball core is arranged in the valve body, an output shaft of the output planet carrier is connected with the ball core, the valve body is provided with three connectors, the three connectors are a port B, a port C and a port A respectively, the port A is an inlet, and the port B is an outlet. A channel a, a channel b and a channel c are arranged in the ball core, the stepping motor controls the ball core to be in a boundary state when the ball core rotates by 90 degrees through the reduction gearbox so that the ball core can be in the four boundary states of 0 degree, 90 degrees, 180 degrees and 270 degrees, the angle between the two boundary states of the ball core is in a transition state, and the ball core is used for adjusting fluid flow when in the transition state. Continuous flow adjustment can be achieved, the phenomenon of shock cooling and shock heating is avoided, opening and closing of the port B and the port C can be independently controlled, and optimal control over the system is achieved.

The invention relates to a non-contact double-layer self-diversion efficient waterproof electric spindle special for an aluminum plate machine, which comprises a machine body, a stator coil and a rotor shaft are arranged in the machine body, and the front end and the rear end of the rotor shaft are rotationally arranged in the machine body through a front bearing pack and a rear bearing pack respectively; the outer side of an inner ring of the front bearing pack is locked through a locking nut, and the outer side of an outer ring is connected with the front cover; an inner ring of the rear bearing pack is installed on the rotor shaft through a gland, and the rear bearing pack is further connected with an elastic pre-tightening structure. A complex contact type sealing structure is abandoned, non-contact type sealing is adopted, and friction is avoided; a double-layer sealing structure is arranged, so that water mist generated by an external complex environment during machining of the aluminum plate machine can be effectively prevented from invading, the machining precision is ensured, and the service life is prolonged; the rotor shaft expands and contracts slightly due to thermal expansion and contraction caused by temperature change in the operation process, and the elastic pre-tightening structure ensures that the bearing can keep a certain pre-tightening force in the thermal expansion and contraction process of the rotor shaft.

The invention belongs to the technical field of processing and manufacturing of sandwich composite material pressure-resistant shells, and particularly relates to a sandwich composite material pressure-resistant shell trepanning reinforcing structure and an assembling method thereof. Comprising a built-in reinforcing ring, an inner bushing, an outer bushing, an outer threaded sleeve and a composite material insulating filling layer, the built-in reinforcing ring is nested in the opening of the sandwich composite material pressure-resistant shell; the inner bushing is inserted into the built-in reinforcing ring from the inner side; the outer bushing is inserted into the built-in reinforcing ring from the outer side; the outer threaded sleeve is sequentially inserted into the inner bushing and the outer bushing from outside to inside; according to the invention, the built-in reinforcing ring, the inner bushing, the outer bushing, the outer threaded sleeve and other strength reinforcing structures are arranged at the opening of the sandwich composite material pressure-resistant shell, so that the pre-tightening force of the reinforcing structures on the sandwich composite material can be ensured, and the composite material insulating filling layers are arranged between the metal piece and the upper and lower surface layers of the sandwich structure; and the problem of electrochemical corrosion of the reinforcing structure in a marine environment can be avoided.

The application provides a radial sealing structure and mounting method, which comprises the following steps: preparing for sealing, placing the sealing cover and the sealing cylinder in the vacuum box after aligning, vacuumizing and pressure-keeping of the vacuum box, inflating the vacuum box to mount the sealing cover in place, and mounting and tightening the connecting screw. The application adopts a special mounting method, which can effectively reduce the mounting difficulty of the sealing structure, ensure the mounting of the sealing structure in place, maintain the pre-tightening force of the mounting screw, and prevent the sealing structure from losing sealing effect due to the reduction of the pre-tightening force.

The invention relates to a high-water-content safflower root cutting feeding type end effector, a robot and a harvesting method. The high-water-content safflower root cutting feeding type end effector comprises a shell, a motor, a sensor, a feeding mechanism, a root cutting mechanism and a sliding rail mechanism. Three groups of high-water-content safflower root cutting feeding type end effectors which are symmetrically arranged on the left, the middle and the right form a filament picking device, and the filament picking device, a movable rack and a safflower filament collecting system mounted on the rack jointly form a robot; in the picking process, the high-water-content safflower root cutting feeding type end effector winds the safflower into an air expansion roller shaft, a motor and a sensor control the gap of the roller shaft in a self-adaptive mode, filaments enter the roller shaft and have certain pre-tightening force, and under the condition that the filament structure is not damaged, the root cutting mechanism conducts high-water-content safflower root cutting; the safflower silk collecting system comprises a silk collecting device, an information collecting device and an automatic control device. Safflower recognition and positioning are completed through the information acquisition device, the automatic control device coordinates with the actuator to achieve simultaneous harvesting of multiple safflowers, and the filament harvesting efficiency is improved.

The invention belongs to the technical field of oil field wellhead operation equipment, and particularly relates to a linkage pressing type tong head reversing mechanism and a pair of power tongs. The pressing rod intermittently abuts against a pressing plate located at the end of the power piece, the guide piston slides in an inner cavity of the shell, the plug pin alternately slides in an arc groove of the tong head, and a linkage mechanism is formed by a connecting rod, the guide piston and the pressing rod, and the connecting rod is hinged to the lower end of the shell and slides on the outer side of the guide piston in a hinged mode. The problem of inaccuracy or instability of bolt transposition is solved, the number of quick-wear parts is reduced, operation is more convenient, the failure rate and the maintenance cost caused by a complex structure are reduced, manual operation of the bolt or a reset knob is not needed, and therefore the operation time and the labor cost are remarkably reduced, and the working efficiency is improved. The production efficiency of oil field wellhead operation is improved, and the actual requirement for diversification of the oil field wellhead operation is met.

A quick-connect casing head relates to the technical field of wellhead devices, including a casing head body and a casing hanger, the casing hanger is suspended in the casing head body, the casing hanger and the casing head body are matched through a conical surface seal, and is characterized in that: a clamping ring is arranged above the casing hanger, the clamping ring and the casing head body are connected by threads, a thrust bearing is arranged between the clamping ring and the casing hanger, a ratchet is arranged at the upper end of the clamping ring, the ratchet is hinged on the clamping ring, a torsion spring is arranged at the hinge, under the torsion of the torsion spring, the free end of the ratchet has a movement tendency against the inner wall of the casing head body, a ratchet matching the ratchet is arranged on the inner wall of the casing head body at a height aligned with the ratchet, and the limiting effect of the ratchet on the ratchet makes the clamping ring rotate only in one direction. The present invention can realize the quick sealing connection between the casing hanger and the casing head body, and improve the construction operation rate.

The invention discloses a stop valve for preventing backflow of raw oil transportation for needle coke production, and relates to the technical field of stop valves. The stop valve for preventing backflow of raw oil transportation for needle coke production comprises a valve body and a valve cover arranged on a stop valve body, wherein a valve disc is slidably connected in the valve body, and a bracket is fixedly connected to the top of the valve cover, a valve stem is threadedly connected to the top of the bracket, and a handle is fixedly connected to the upper end of the valve stem. The stop valve for preventing backflow of raw oil transportation for needle coke production can provide a pre-tightening force to the valve disc after the valve disc is closed, which can not only improve the sealing effect of the stop valve body, but also reduce vibration and noise, and extend the service life of the stop valve body; it is convenient to adjust the pre-tightening force of the valve disc and the valve seat, and has stronger applicability; it can automatically clean the surface of the valve stem again to avoid the accumulation of dust and foreign matter, reduce the friction and wear of the valve stem, make the rotation of the valve stem smoother, and improve its use effect and life.

The invention relates to the technical field of wiring terminals, in particular to a wiring terminal assembly which comprises a shell, first conductive metal and second conductive metal are fixedly installed in the shell, the second conductive metal is located below the first conductive metal, metal gaskets are arranged at the two ends of the first conductive metal and the two ends of the second conductive metal, and a plurality of reinforcing screws are arranged on the metal gaskets. The shell is provided with the rotating plate anti-loosening assembly, when the anti-loosening assembly is closed, the anti-loosening block on the rotating plate can be aligned with the reinforcing screw, the anti-loosening block can apply pressure to the reinforcing screw, and then rotation of the reinforcing screw is limited, so that the situation that the reinforcing screw rotates due to continuous vibration during equipment operation is avoided through the design, and the service life of the reinforcing screw is prolonged. According to the wiring terminal assembly, the pre-tightening force of the reinforcing screws is further ensured, the lead is prevented from loosening under long-term vibration, the safety of the wiring terminal assembly is improved, the anti-loosening assembly can prevent the screws from loosening, the cost is reduced, and the working efficiency of workers is also improved.

The utility model relates to the technical field of steel bar sleeves. The utility model discloses a self-adaptive reducing steel bar sleeve spring pre-tightening mechanism which comprises a reducing sleeve, the inner side of the reducing sleeve is rotatably connected with a pre-tightening assembly, the outer side of the reducing sleeve is fixedly connected with a limiting assembly, the pre-tightening assembly further comprises a rotating ring, the outer side of the rotating ring is fixedly connected with an extension spring, and the outer side of the extension spring is fixedly connected with a limiting assembly. According to the mechanism, the pre-tightening assembly is arranged, the pre-tightening sleeve is rotated, a threaded groove in the inner side of the pre-tightening sleeve is meshed with a thread on the outer side of a steel bar, the pre-tightening sleeve gradually slides out of the variable-diameter sleeve in the rotating process, and at the moment, the extension spring is in a stretched state; when the steel bar is pre-tightened, a tensile force close to the variable-diameter sleeve is applied to the pre-tightening sleeve, so that the steel bar is pre-tightened preliminarily, the steel bar and the variable-diameter sleeve are connected more tightly, the position of the steel bar is fixed preliminarily, and the steel bar is prevented from being loosened easily in the subsequent construction or use process.

The invention relates to the technical field of crawler-type pushing equipment, and particularly discloses a special bottom plate protection device for crawler-type pushing equipment and a using method.The using method comprises the steps that rubber protection belts are installed on the upper surface and the lower surface of a crawler belt through support assemblies arranged on the two sides of the crawler-type pushing equipment; a closed transmission rubber protection belt is formed around the crawler belt; the pushing oil cylinder serves as power for driving the crawler belt to rotate to drive the crawler belt to act, and the distance sensors arranged at the upper end and the lower end of the pushing oil cylinder are used for measuring pushing distance signals of the pushing oil cylinder in real time. And the pushing distance signal is transmitted to a control system, the control system obtains the pushing speed of a pushing oil cylinder based on the pushing distance signal, and the rotating speed of a servo driving motor is adjusted according to the pushing speed so that the rubber protection belt can automatically follow a crawler belt to synchronously rotate. Automatic sensing and automatic following are achieved, the speed can be automatically changed according to the pushing speed, and external force on the rubber belt is reduced.

The application discloses a cell culture shaking device convenient to adjust, and relates to the technical field of cell culture.The cell culture shaking device convenient to adjust comprises a shaking plate, the shaking plate is obliquely arranged in a shell, a plurality of holes are formed in the surface of the shaking plate, a limiting assembly is fixedly connected to the inner side surface of the shaking plate, a driving assembly is fixedly connected to the bottom of the inner side surface of the shell, the side of the driving assembly close to an end cover is in surface spline connection with the limiting assembly, and a clamping assembly is fixedly connected to the inner wall of the hole of the shaking plate.Because the shaking plate is obliquely arranged, the culture bottle not only generates horizontal circular motion in the rotating process, but also generates up-down displacement along the inclined surface of the shaking plate.In the process of revolving around the driving assembly once, the culture bottle will experience a complete rising and falling process, three-dimensional composite oscillation effect is formed, the culture medium and the culture bottle generate complex relative movement, cell and nutrient substance contact can be more efficiently promoted, and gas exchange efficiency is enhanced.

The utility model relates to the field of distribution box discloses an easily detachable mounting seat of low -voltage comprehensive distribution box, including bearing plate, the bearing plate is fixed at the bottom surface of distribution box body, the bottom surface of bearing plate is provided with two mounting seat bodies, is equipped with two positioning holes on mounting seat body, the bottom surface of bearing plate is equipped with a plurality of accommodating grooves, mounting seat body is inserted in accommodating groove, the left and right sides of bearing plate all are equipped with two L -shaped grooves, L -shaped groove is linked together with accommodating groove, the inner wall left and right sides of L -shaped groove all are equipped with mounting groove. In the utility model, through the synergies of limiting block, L -shaped limiting rod and limiting frame, the multidirectional location and self -locking fixed function of mounting seat body are realized, make mounting seat body not need to help the tool and can conveniently dismouting, have saved the labor and time cost, further saved the land occupation of distribution box body and mounting seat body when transporting.

The utility model relates to the technical field of household appliances, and discloses refrigeration equipment which comprises a shell, an inner container pre-embedded box and an installation piece, an installation through hole is formed in an inner container, the pre-embedded box is provided with an opening opposite to the installation through hole, and the pre-embedded box abuts against the outer surface of the inner container; the installation part abuts against the inner surface of the inner container and is fixedly connected with the embedded box through a clamping structure. The clamping structure comprises a locking piece and a buckling piece, and the locking piece is provided with a locking part with a circular section; the buckling piece comprises two arc-shaped clamping parts which are oppositely arranged, and a clamping space is defined between the two arc-shaped clamping parts; the locking part is clamped and fixed in the clamping space; when the wall thickness of the inner container is increased, the arc-shaped clamping parts of the buckling pieces are stressed to be opened, and the inner stress of the arc-shaped clamping parts enables the installation pieces to press the outer surface of the inner container inwards. According to the refrigeration equipment, the clamping structure design can adapt to the change of the wall thickness of the inner container and keep a certain pre-tightening force. Meanwhile, the gap between the mounting piece and the inner surface of the inner container is kept small, and the overall appearance is not affected.

The invention relates to the technical field of transformers, in particular to an energy-saving dry-type transformer for an energy storage power station, which comprises a base, an iron core, a lower supporting plate, low-voltage windings, high-voltage windings, an upper supporting plate and a heat dissipation fan, the low-voltage windings are coaxially sleeved with the high-voltage windings, a heat dissipation gap is reserved between each low-voltage winding and the corresponding high-voltage winding, and the energy-saving dry-type transformer further comprises a locking disc, each iron core is sleeved with a locking disc, the locking discs are horizontally and fixedly installed on the lower supporting plate, the high-voltage winding and the low-voltage winding are both placed on the locking discs, and the locking discs are further provided with clamping assemblies used for locking the high-voltage winding and the low-voltage winding. By arranging the clamping assembly, the low-voltage winding and the high-voltage winding can be rapidly clamped to the locking disc during installation, rapid positioning and installation between the low-voltage winding and the high-voltage winding are facilitated, and compared with traditional bolt positioning and installation, the installation speed of the whole dry-type transformer is increased.